diff --git a/blog/2014/10/17/README.md b/blog/2014/10/17/README.md index bed33aef5..3d46e0e8e 100644 --- a/blog/2014/10/17/README.md +++ b/blog/2014/10/17/README.md @@ -16,7 +16,7 @@ when the keyboard's "clock" line is toggled (see *set8042CmdData()* in [chipset. a 40-track diskette). + The BIOS Diskette Reset function does something odd after resetting the Floppy Disk Controller: it issues not one but *four* "SENSE INTERRUPT STATUS" commands to the FDC, and expects each response to -return an incrementally larger drive number. I found this a bit mystifying, considering that the IBM's +return an incrementally larger drive number. I found this a bit mystifying, considering that IBM's own FDC/HDC "combo card" supports a maximum of *two* diskette drives. But, there's no point in arguing with a BIOS that's almost 30 years old. + The BIOS attempts to detect what its authors must have considered a common problem: failure to run SETUP @@ -28,22 +28,22 @@ to discover that the ATC had this behavior, and now I'm wondering how many other immediate "STATUS" register updates. This PCjs release also fixes a problem reported by a user: if you disable **localStorage** support in your -browser, previous versions would fault. I knew that every browser that supports PCjs also supports -**localStorage**, but I didn't consider what might happen if a user had decided to turn it off. +browser, previous versions of PCjs would fault. While every browser that supports PCjs also supports +**localStorage**, I didn't consider what might happen if a user decided to turn it off. The only downside to turning off **localStorage** is that none of your PCjs machines will be able save/restore -their state when you leave/return to the page, so they will always reboot. +their state when you leave/return to the page; they will always reboot. Browser's don't always refer to the **localStorage** feature by its actual name, either. For example, in Chrome, the setting that enables/disables **localStorage** is hidden under "Advanced Settings" => "Privacy" => -"Content Settings" => "Cookies" => "Allow local data to be set (recommended)". Which is a little misleading -and annoying, because **localStorage** != **cookie**. +"Content Settings" => "Cookies" => "Allow local data to be set (recommended)". Which is somewhat misleading +and a little annoying, because **localStorage** is *not* a **cookie**. PCjs *never* sets any cookies. Cookies are bits of data that your browser saves and then automatically sends -off to the server every time you make a request. **localStorage** is nothing more than local storage. Granted, -a JavaScript application could certainly abuse it and send it around like a cookie, but PCjs doesn't do that. -The only exception is when PCjs detects a problem, and even then, you must first agree to submit your machine's -state as part of the bug report. +off to the server every time you make a request. **localStorage** is nothing more than local storage; it is +*not* automatically sent anywhere. Granted, a JavaScript application could abuse it and send it around like a +cookie, but PCjs does *not* do that; the only exception is when PCjs detects a problem, and even then, you must +first agree to submit your machine's state as part of the bug report. *[@jeffpar](http://twitter.com/jeffpar)* *October 17, 2014* diff --git a/docs/about/pcjs/README.md b/docs/about/pcjs/README.md index 2111f0a2a..a7033b2b1 100644 --- a/docs/about/pcjs/README.md +++ b/docs/about/pcjs/README.md @@ -45,8 +45,8 @@ The following features are targeted for version 1.16: ### History -+ v1.15 introduced PC AT (Model 5170) emulation, as discussed on our [Blog](/blog/2014/09/13/). -+ v1.14 introduced limited EGA emulation, as discussed on our [Blog](/blog/2014/07/30/). ++ v1.15 introduced PC AT (Model 5170) emulation, as discussed in the [blog](/blog/2014/09/13/). ++ v1.14 introduced limited EGA emulation, as discussed in the [blog](/blog/2014/07/30/). + v1.13 introduced manifest files that describe software packages that can be used with PCjs. More information on software manifests is available [here](/apps/). + v1.12.1 coincided with the first release of the new PCjs web server running on [Node.js](http://nodejs.org). diff --git a/my_modules/diskdump/lib/diskdump.js b/my_modules/diskdump/lib/diskdump.js index 4d9850771..f094e014a 100644 --- a/my_modules/diskdump/lib/diskdump.js +++ b/my_modules/diskdump/lib/diskdump.js @@ -36,17 +36,17 @@ "use strict"; -var fs = require("fs"); -var path = require("path"); -var http = require("http"); -var mkdirp = require("mkdirp"); -var crypto = require("crypto"); -var net = require("../../shared/lib/netlib"); -var proc = require("../../shared/lib/proclib"); -var str = require("../../shared/lib/strlib"); -var usr = require("../../shared/lib/usrlib"); +var fs = require("fs"); +var path = require("path"); +var http = require("http"); +var mkdirp = require("mkdirp"); +var crypto = require("crypto"); +var net = require("../../shared/lib/netlib"); +var proc = require("../../shared/lib/proclib"); +var str = require("../../shared/lib/strlib"); +var usr = require("../../shared/lib/usrlib"); var DumpAPI = require("../../shared/lib/dumpapi"); -var X86 = require("../../pcjs-client/lib/x86"); +var X86 = require("../../pcjs-client/lib/x86"); /** * @class exports @@ -73,7 +73,7 @@ var fNormalize = true; * * TODO: Honor the caller's mbHD size. At the moment, any hard disk build request translates to 10Mb, * since we rely on a "canned" BPB in aDefaultBPBs. - * + * * TODO: If sServerRoot is set, make sure the final sDiskPath refers to something in either /apps/ or /disks/, * to prevent random enumeration of other server resources. * @@ -114,7 +114,7 @@ function DiskDump(sDiskPath, asExclude, sFormat, fComments, mbHD, sServerRoot, s /* * If we have to enumerate one or more files during the buildImage() process, this array * will save them, in case the caller wants to query that information later, in updateManifest(). - * + * * Originally, I thought each saved entry would be a subset of what the fileInfo objects contain, * but it turns out I pretty much need everything. This, in turn, means that some of the original * buildImage() functions could simply use this.aManifestInfo, instead of their own aFiles array, @@ -196,7 +196,7 @@ DiskDump.MY_OEM_STRING = "PCJS.ORG"; /** * The BPBs that buildImage() currently supports; these BPBs should be in order of smallest to largest capacity, - * to help insure we don't select a disk format larger than necessary. + * to help insure we don't select a disk format larger than necessary. */ DiskDump.aDefaultBPBs = [ [ // define BPB for 160Kb diskette @@ -279,7 +279,7 @@ DiskDump.aDefaultBPBs = [ * diskdump --dir={directory} [--format=json|data|hex|bytes|img] [--comments] [--output={file}] * diskdump --disk={disk image} [--format=json|data|hex|bytes|img] [--comments] [--output={file}] * diskdump --path={file[;file]...} [--format=json|data|hex|bytes|img] [--comments] [--output={file}] - * + * * NOTE: --img is permitted as an alias for --disk * * Arguments @@ -290,9 +290,9 @@ DiskDump.aDefaultBPBs = [ * * Note that command-line arguments, if any, are not validated. For example, argv['comments'] may be any of * boolean, string, or undefined, since the user may have typed "--comments" or "--comments=foo" or nothing at all. - * + * * Additional command-line arguments include: - * + * * --mbhd={number}: requests a hard disk image with the given number of megabytes (eg, 10 for a 10mb image) * --exclude={filename}: specifies a filename that should be excluded from the image; repeat as often as needed * --overwrite: allows the --output option to overwrite an existing file; default is to NOT overwrite @@ -320,7 +320,7 @@ DiskDump.CLI = function() var sDiskPath = null, sServerRoot = ""; var sDir = argv['dir'], sDisk = (argv['disk'] || argv['img']), sPath = argv['path']; - + if (typeof sDir == "string") { sDiskPath = sDir; } @@ -345,7 +345,7 @@ DiskDump.CLI = function() if (sManifestFile && sManifestFile.charAt(0) != '/') { sManifestFile = path.join(process.cwd(), sManifestFile); } - + var sOutput = ""; var sOutputFile = argv['output']; if (typeof sOutputFile == "string" && !str.endsWith(sOutputFile, ".img") && !str.endsWith(sOutputFile, ".json")) { @@ -362,14 +362,14 @@ DiskDump.CLI = function() } } else { sOutput = "disk"; - } + } sOutputFile = sOutput + '.' + argv['format']; } if (sOutputFile && sOutputFile.charAt(0) != '/') sOutputFile = path.join(process.cwd(), sOutputFile); var fOverwrite = argv['overwrite']; var sManifestTitle = argv['title']; - + if (sDiskPath) { var disk = new DiskDump(sDiskPath, asExclude, argv['format'], argv['comments'], argv['mbhd'], sServerRoot, sManifestFile); if (sDir) { @@ -394,7 +394,7 @@ DiskDump.CLI = function() else { console.log("usage: diskdump --dir={dir}|--disk={disk}|--path={file}[;{file}...] [--format=json|data|hex|bytes|img] [--comments] [--output={file}] [--manifest={file}]"); } - + if (err) { DiskDump.logError(err); process.exit(1); @@ -432,9 +432,9 @@ DiskDump.outputDisk = function(err, disk, sDiskPath, sOutputFile, fOverwrite, sM } } if (data) { - + var cbDisk = (disk.bufDisk? disk.bufDisk.length : data.length); - + if (sOutputFile) { var fUnchanged; @@ -448,7 +448,7 @@ DiskDump.outputDisk = function(err, disk, sDiskPath, sOutputFile, fOverwrite, sM } fUnchanged = DiskDump.updateManifest(disk, disk.sManifestFile, sDiskPath, sOutputFile, true, sManifestTitle, md5Disk, md5JSON); } - + try { if (fUnchanged) { console.log(sOutputFile + " unchanged"); @@ -468,7 +468,7 @@ DiskDump.outputDisk = function(err, disk, sDiskPath, sOutputFile, fOverwrite, sM } else { /* * We'll dump JSON to the console, but not a raw disk buffer; we could add an option to - * "stringify" buffers, but if that's what the caller wants, they should use "--format=json". + * "stringify" buffers, but if that's what the caller wants, they should use "--format=json". */ if (typeof data == "string") { console.log(data); @@ -480,7 +480,7 @@ DiskDump.outputDisk = function(err, disk, sDiskPath, sOutputFile, fOverwrite, sM err = new Error("unable to convert " + disk.sDiskPath); } } - + if (err) { DiskDump.logError(err); process.exit(1); @@ -489,7 +489,7 @@ DiskDump.outputDisk = function(err, disk, sDiskPath, sOutputFile, fOverwrite, sM /** * getManifestAttr(sID, sTag) - * + * * @param sID * @param sTag * @return {string|null} @@ -503,14 +503,14 @@ DiskDump.getManifestAttr = function(sID, sTag) /** * updateManifest(disk, sManifestFile, sDiskPath, sOutputFile, fOverwrite, sTitle, md5Disk, md5JSON) - * + * * This function reports a change if EITHER the md5Disk value does not match the original * "md5" value recorded in the manifest OR the manifest itself has changed. If md5JSON is * also provided, we require that to match as well. - * + * * Since this function is for command-line use only, we use *Sync functions, so that we can * return the results immediately. - * + * * @param {DiskDump} disk * @param {string} sManifestFile * @param {string} sDiskPath @@ -523,9 +523,9 @@ DiskDump.getManifestAttr = function(sID, sTag) */ DiskDump.updateManifest = function(disk, sManifestFile, sDiskPath, sOutputFile, fOverwrite, sTitle, md5Disk, md5JSON) { - var fUnchanged, fExists = false, sXML, err = null; + var fUnchanged, fExists = false, sXML, err = null; var sMatchDisk = null, sIDDisk = null, sMD5Disk = null, sMD5JSON = null; - + try { sXML = fs.readFileSync(sManifestFile, {encoding: "utf8"}); fExists = true; @@ -544,7 +544,7 @@ DiskDump.updateManifest = function(disk, sManifestFile, sDiskPath, sOutputFile, sXML += '\t' + sTitle + '\n'; sXML += ''; } - + var i = sOutputFile.indexOf("/disks/"); if (i > 0) { sOutputFile = sOutputFile.substr(i); @@ -562,7 +562,7 @@ DiskDump.updateManifest = function(disk, sManifestFile, sDiskPath, sOutputFile, sMD5Disk = DiskDump.getManifestAttr("md5", match[1]); sMD5JSON = DiskDump.getManifestAttr("md5json", match[1]); } - + if (!sIDDisk) { for (i = 1; i < 1000; i++) { sIDDisk = i.toString(); @@ -574,7 +574,7 @@ DiskDump.updateManifest = function(disk, sManifestFile, sDiskPath, sOutputFile, err = new Error("manifest already contains " + i + " disks"); } } - + if (!err) { /* * Thanks to buildImage(), fDir is true if a "dir" parameter was provided, false if a "path" parameter was provided, @@ -586,10 +586,10 @@ DiskDump.updateManifest = function(disk, sManifestFile, sDiskPath, sOutputFile, } else if (disk.fDir === undefined) { sParm = "img"; } - + /* * Build a "size" attribute with the total disk size in bytes and a "chs" attribute that describes the disk geometry; eg: - * + * * size="368640" chs="40:2:9" */ var size = 0, sCHS = ""; @@ -598,7 +598,7 @@ DiskDump.updateManifest = function(disk, sManifestFile, sDiskPath, sOutputFile, size = disk.dataDisk.length * disk.dataDisk[0].length * disk.dataDisk[0][0].length * disk.dataDisk[0][0][0].length; } var sXMLDisk = '\t\n'; - + var sName = ""; if (sMatchDisk && (match = sMatchDisk.match(/([^>]*)<\/name>/))) { sName = match[1]; @@ -618,7 +618,7 @@ DiskDump.updateManifest = function(disk, sManifestFile, sDiskPath, sOutputFile, var fileInfo = disk.aManifestInfo[i]; if (fileInfo.FILE_SIZE < 0) continue; // ignore non-file entries var sDir = path.dirname(fileInfo.FILE_PATH) + '/'; - if (sBaseDir === null) sBaseDir = sDir; + if (sBaseDir === null) sBaseDir = sDir; sAttrs += ' size="' + fileInfo.FILE_SIZE + '"'; sAttrs += ' time="' + usr.formatDate("Y-m-d H:i:s", fileInfo.FILE_TIME) + '"'; sAttrs += ' attr="0x' + fileInfo.FILE_ATTR.toString(16) + '"'; @@ -713,7 +713,7 @@ DiskDump.getStat = function(sPath, done) /** * readFile(sPath, sEncoding, done) - * + * * An alternative to fs.readFile() that handles supported remote files, in addition to local files * * @param {string} sPath @@ -753,7 +753,7 @@ DiskDump.readFile = function(sPath, sEncoding, done) * * @this {DiskDump} * @param {string} sName is the basename of a file under consideration - * @return {boolean} is true if the file should be excluded, false if not + * @return {boolean} is true if the file should be excluded, false if not */ DiskDump.prototype.isExcluded = function(sName) { @@ -818,7 +818,7 @@ DiskDump.prototype.setData = function(err, buf, done) * with comments, so if the caller has requested comments, we immediately convert the * JSON to a Buffer and throw the JSON away. The next convertToJSON() call will take care * of the rest. - * + * * We could also move this functionality into its own function, or wait until the * caller actually calls convertToJSON() -- although if the caller inadvertently calls * convertToJSON() multiple times, you don't want to be regenerating the JSON every time. @@ -1049,7 +1049,7 @@ DiskDump.ATTR_ARCHIVE = 0x20; * * @this {DiskDump} * @param {Date} dateTime - * @return {boolean} true if date/time modified, false if not + * @return {boolean} true if date/time modified, false if not */ DiskDump.prototype.validateTime = function(dateTime) { @@ -1067,7 +1067,7 @@ DiskDump.prototype.validateTime = function(dateTime) * nothing that in PC-DOS 2.0, I observed a date with the largest possible year value (127) displayed as * "12-31-:7" (an ASCII ':' is the next highest character after '0'). While that DOES distinguish the year * 2007 from the year 2107, we probably shouldn't allow any year > 2099, to eliminate confusion. - * + * * In fact, it might be worth setting the upper limit to 2079, otherwise a date like "12-31-81" is ambiguous * (it could mean 1981 or 2081). But I'll stick to a limit of 2099 for now. */ @@ -1168,19 +1168,19 @@ DiskDump.prototype.readDir = function(sDir, fRoot, done) done(err, null); return; } - + /* * Sorting file names now (since they're just strings) is easier/faster than sorting the filtered * aFiles array later (which would require the use of a compare function), so we do the sort now; it * has no bearing on the outcome. Note that the lack of a stable sort in JavaScript also has no * bearing, because we're sorting on name, and every name is different. - * + * * However, it's not entirely clear whether this is strictly necessary. I think the variations in * file name order that I was originally seeing may have simply been due to out-of-order fs.stat() * calls, because I used to call addManifestInfo() in the callback. */ // if (fNormalize) asFiles.sort(); - + for (iFile = 0; iFile < asFiles.length; iFile++) { var sFileName = asFiles[iFile]; /* @@ -1201,7 +1201,7 @@ DiskDump.prototype.readDir = function(sDir, fRoot, done) fileInfo.FILE_NAME = obj.buildName(sFileName); fileInfo.FILE_PATH = sFilePath; aFiles.push(fileInfo); - + /* * We add the fileInfo objects to the aManifestInfo array NOW, because the fs.stat() callbacks may * occur out-of-order. The only downside is that non-file entries can now appear in the array, which @@ -1209,7 +1209,7 @@ DiskDump.prototype.readDir = function(sDir, fRoot, done) */ obj.addManifestInfo(fileInfo); } - + var errSave = null; for (iFile = 0; iFile < aFiles.length; iFile++) { if (!aFiles[iFile].FILE_PATH) continue; @@ -1332,7 +1332,7 @@ DiskDump.prototype.readPath = function(sPath, done) var obj = this; var cCallbacks = 0; var errSave = null; - + for (iFile = 0; iFile < aFiles.length; iFile++) { if (!aFiles[iFile].FILE_PATH) continue; (function readPathEntry(fileInfo) { @@ -1341,7 +1341,7 @@ DiskDump.prototype.readPath = function(sPath, done) /* * TODO: See if we can eliminate some of the unfortunate redundancy between the code * below and the very similar code in readDir(), such as the "README.md" pre-processing. - * + * * However, in this case, because we want readPath() to support both local and remote * paths, we call DiskDump.readFile() instead of fs.readFile(). */ @@ -1897,15 +1897,15 @@ DiskDump.prototype.buildImageFromFiles = function(aFiles, done) */ var cbMax = (this.mbHD? this.mbHD * 1024 * 1024 : 1440 * 1024); var cbTotal = this.calcFileSizes(aFiles); - + if (fDebug) console.log("total calculated size for " + aFiles.length + " files/folders: " + cbTotal + " bytes (0x" + str.toHex(cbTotal) + ")"); - + if (cbTotal >= cbMax) { err = new Error("file(s) too large (" + cbTotal + " bytes total, " + cbMax + " bytes maximum)"); done(err); return false; } - + var abBoot, cbSector, cSectorsPerCluster, cbCluster, cFATs, cFATSectors; var cRootEntries, cRootSectors, cTotalSectors, cSectorsPerTrack, cHeads, cDataSectors, cbAvail; @@ -2027,7 +2027,7 @@ DiskDump.prototype.buildImageFromFiles = function(aFiles, done) offDisk += cClusters * cSectorsPerCluster * cbSector; if (fDebug) console.log(offDisk + " bytes written, " + cbDisk + " bytes available"); - + if (offDisk > cbDisk) { err = new Error("too much data for disk image (" + cClusters + " clusters required)"); done(err); @@ -2064,17 +2064,17 @@ DiskDump.prototype.convertToJSON = function() try { var cbDiskData = this.bufDisk.length; // console.log("length of buffer: " + cbDiskData); - + var nHeads = 0; var nCylinders = 0; var nSectorsPerTrack = 0; - + var aTracks = []; // track array (used only for disk images with track tables) var iTrack, cbTrack, offTrack, bufTrack, bufSector; - + var cbSector = 512; // default sector size var offBootSector = 0; - + if (cbDiskData >= 3000000) { // arbitrary threshold between diskette image sizes and hard disk image sizes /* * In this case, the first sector should be an MBR; find the active partition entry, @@ -2093,10 +2093,10 @@ DiskDump.prototype.convertToJSON = function() * other reserved sectors. */ } - + var bByte0 = this.bufDisk.readUInt8(offBootSector + DiskDump.BPB.JMP_OPCODE); var cbSectorBPB = this.bufDisk.readUInt16LE(offBootSector + DiskDump.BPB.SECTOR_BYTES); - + /* * These checks are not only necessary for DOS 1.x diskette images (and other pre-BPB images), * but also non-DOS diskette images (eg, CPM-86 diskettes). @@ -2134,7 +2134,7 @@ DiskDump.prototype.convertToJSON = function() } } } - + if (!nHeads) { /* * Next, check for a DSK header (an old private format I used to use, which begins with either 0x00 (read-write) or 0x01 (write-protected), @@ -2180,7 +2180,7 @@ DiskDump.prototype.convertToJSON = function() } } } - + if (nHeads) { /* * Output the disk data as an array of cylinders, each containing an array of tracks (one track per head), @@ -2194,9 +2194,9 @@ DiskDump.prototype.convertToJSON = function() json = this.dumpLine(2, "[", "DiskDump of " + this.sDiskPath + " via " + DiskDump.sNotice); } for (var iCylinder=0; iCylinder < nCylinders; iCylinder++) { - + // if (fDebug) console.log("dumping cylinder " + iCylinder); - + var aHeads; if (this.fJSONNative) { aHeads = new Array(nHeads); @@ -2206,9 +2206,9 @@ DiskDump.prototype.convertToJSON = function() } var offHead = 0; for (var iHead=0; iHead < nHeads; iHead++) { - + // if (fDebug) console.log(" dumping head " + iHead); - + if (aTracks.length) { var aTrack = aTracks[iTrack++]; nSectorsPerTrack = aTrack[0]; @@ -2218,9 +2218,9 @@ DiskDump.prototype.convertToJSON = function() } else { bufTrack = this.bufDisk.slice(offTrack + offHead, offTrack + offHead + cbTrack); } - + // if (fDebug) console.log(" track buffer length: " + bufTrack.length); - + var aSectors; if (this.fJSONNative) { aSectors = new Array(nSectorsPerTrack); @@ -2228,13 +2228,13 @@ DiskDump.prototype.convertToJSON = function() } else { json += this.dumpLine(2, "[", "head:" + this.sJSONWhitespace + iHead + ", track:" + this.sJSONWhitespace + iCylinder); } - + for (var iSector=1, offSector=0; offSector < cbTrack; iSector++, offSector += cbSector) { - + var sector = {}; - + // if (fDebug) console.log(" dumping sector " + iSector); - + bufSector = bufTrack.slice(offSector, offSector + cbSector); if (this.fJSONNative) { sector['sector'] = iSector; @@ -2304,7 +2304,7 @@ DiskDump.prototype.convertToJSON = function() /** * convertOSIDiskToJSON() - * + * * This is called when we detect a "CW" signature at offset 0x900 of bufDisk, so we'll try parsing the data * as an OSI disk image, and output the data in JSON as an array of heads, each containing an array of tracks, * like so: @@ -2344,7 +2344,7 @@ DiskDump.prototype.convertOSIDiskToJSON = function() var iTrack = 0; var offTrack = 0; var cbTrack = 0x900; // this is the raw track length for a 40-track 5.25-inch disk image - + if (this.fJSONNative) { json = ""; } else { @@ -2352,7 +2352,7 @@ DiskDump.prototype.convertOSIDiskToJSON = function() } json += this.dumpLine(2, "["); json += this.dumpLine(2, "["); // begin array of heads - + while (true) { var bufSector; var bufTrack = this.bufDisk.slice(offTrack, offTrack + cbTrack); @@ -2449,7 +2449,7 @@ DiskDump.prototype.convertOSIDiskToJSON = function() * convertToIMG() * * Converts the disk image data to a Buffer. - * + * * TODO: Consider creating a caching mechanism for these requests (ie, stash a limited number of these * disk images under /tmp, using a name based on a hash of the source path). * @@ -2507,7 +2507,7 @@ DiskDump.prototype.convertToIMG = function() * sectors per track, etc). */ var buf = null; - + try { /* * We need to be prepared for any number of errors due to malformed data; in fact, it's entirely @@ -2518,10 +2518,10 @@ DiskDump.prototype.convertToIMG = function() var nHeads = this.dataDisk[0].length; var nSectorsPerTrack = this.dataDisk[0][0].length; var cbDisk = nCylinders * nHeads * nSectorsPerTrack * 512; - + var off = 0; buf = new Buffer(cbDisk); - + /* * WARNING: Buffers are NOT zero-initialized, so we need explicitly fill it with zeros (this seems to * be a reversal in the trend to zero buffers, when security concerns used to trump performance concerns). @@ -2596,7 +2596,7 @@ DiskDump.prototype.convertToIMG = function() } if (buf.length < 3000000) { // arbitrary threshold between diskette image sizes and hard disk image sizes /* - * Mimic the BPB test in convertToJSON(), because we don't want to blast an OEM string into non-DOS diskette images + * Mimic the BPB test in convertToJSON(), because we don't want to blast an OEM string into non-DOS diskette images */ var bByte0 = buf.readUInt8(DiskDump.BPB.JMP_OPCODE); var cbSectorBPB = buf.readUInt16LE(DiskDump.BPB.SECTOR_BYTES); @@ -2611,7 +2611,7 @@ DiskDump.prototype.convertToIMG = function() DiskDump.logError(err); return null; } - + this.bufDisk = buf; } return this.bufDisk; diff --git a/my_modules/filedump/lib/filedump.js b/my_modules/filedump/lib/filedump.js index c5e4f2afd..762e4a4dc 100644 --- a/my_modules/filedump/lib/filedump.js +++ b/my_modules/filedump/lib/filedump.js @@ -32,12 +32,12 @@ "use strict"; -var fs = require("fs"); -var path = require("path"); -var mkdirp = require("mkdirp"); -var net = require("../../shared/lib/netlib"); -var proc = require("../../shared/lib/proclib"); -var str = require("../../shared/lib/strlib"); +var fs = require("fs"); +var path = require("path"); +var mkdirp = require("mkdirp"); +var net = require("../../shared/lib/netlib"); +var proc = require("../../shared/lib/proclib"); +var str = require("../../shared/lib/strlib"); var DumpAPI = require("../../shared/lib/dumpapi"); /** @@ -661,7 +661,7 @@ FileDump.prototype.outputFile = function(sOutputFile, fOverwrite) } else { /* * We'll dump JSON to the console, but not a raw file buffer; we could add an option to - * "stringify" buffers, but if that's what the caller wants, they should use "--format=json". + * "stringify" buffers, but if that's what the caller wants, they should use "--format=json". */ if (typeof data == "string") { console.log(data); diff --git a/my_modules/htmlout/lib/htmlout.js b/my_modules/htmlout/lib/htmlout.js index 425d94215..964c4f5b5 100644 --- a/my_modules/htmlout/lib/htmlout.js +++ b/my_modules/htmlout/lib/htmlout.js @@ -41,10 +41,10 @@ var glob = require("glob"); var HTTPAPI = require("./httpapi"); var DumpAPI = require("../../shared/lib/dumpapi"); var MarkOut = require("../../markout"); -var net = require("../../shared/lib/netlib"); -var proc = require("../../shared/lib/proclib"); -var str = require("../../shared/lib/strlib"); -var usr = require("../../shared/lib/usrlib"); +var net = require("../../shared/lib/netlib"); +var proc = require("../../shared/lib/proclib"); +var str = require("../../shared/lib/strlib"); +var usr = require("../../shared/lib/usrlib"); /** * @class exports diff --git a/my_modules/htmlout/lib/httpapi.js b/my_modules/htmlout/lib/httpapi.js index aba7cdeb5..9ff72a277 100644 --- a/my_modules/htmlout/lib/httpapi.js +++ b/my_modules/htmlout/lib/httpapi.js @@ -32,24 +32,24 @@ "use strict"; -var fs = require("fs"); -var path = require("path"); +var fs = require("fs"); +var path = require("path"); /** * @class exports * @property {function(string)} sync */ -var mkdirp = require("mkdirp"); +var mkdirp = require("mkdirp"); -var DiskAPI = require("../../shared/lib/diskapi"); -var DumpAPI = require("../../shared/lib/dumpapi"); -var DiskDump = require("../../diskdump"); -var FileDump = require("../../filedump"); -var UserAPI = require("../../shared/lib/userapi"); -var ReportAPI = require("../../shared/lib/reportapi"); -var net = require("../../shared/lib/netlib"); -var str = require("../../shared/lib/strlib"); -var usr = require("../../shared/lib/usrlib"); +var DiskAPI = require("../../shared/lib/diskapi"); +var DumpAPI = require("../../shared/lib/dumpapi"); +var UserAPI = require("../../shared/lib/userapi"); +var ReportAPI = require("../../shared/lib/reportapi"); +var net = require("../../shared/lib/netlib"); +var str = require("../../shared/lib/strlib"); +var usr = require("../../shared/lib/usrlib"); +var DiskDump = require("../../diskdump"); +var FileDump = require("../../filedump"); /** * @type {HTMLOut} @@ -59,7 +59,7 @@ var HTMLOut; /** * sServerRoot is the root directory of the web server; it can (and should) be overridden using by the Express * web server using setRoot(). - * + * * @type {string} */ var sServerRoot = ""; @@ -70,7 +70,7 @@ var sServerRoot = ""; * the entries on the left-hand side should contain trailing slashes. * * FYI, here's what the jsmachines.net .htaccess contained before we retired its Apache webserver: - * + * * Redirect permanent /c1p /docs/c1pjs/ * Redirect permanent /c1pjs /docs/c1pjs/ * Redirect permanent /pc /docs/pcjs/ @@ -118,10 +118,10 @@ var externalRedirects = { * and continue until a match is found, at which point the okens =cement is performed and comparisons stop; * we could make the replacement process "additive", by continuing comparisons/replacements until the * end is reached, but let's not, unless there's an actual need. - * + * * In fact, until I find a compelling need for any of these redirects, I'm going to disable them, so that we * don't waste time running RegExp tests on every server request. - * + * * Feel free to use subgroups on the left-hand side, and references to them (eg, $1, $2, etc) on the right. */ var internalRedirects = { @@ -238,7 +238,7 @@ HTTPAPI.filterAPI = function(req, res, next) /** * hasAPICommand(req, asCommands) - * + * * @param {Object} req * @param {Array.} asCommands (eg, DumpAPI.asDiskCommands or DumpAPI.asFileCommands) * @returns {Array|null} @@ -256,7 +256,7 @@ HTTPAPI.hasAPICommand = function(req, asCommands) /** * initUserVolume(vol, fd, cbInit) - * + * * @param {Object} vol * @param {number} fd * @param {number} cbInit @@ -326,7 +326,7 @@ HTTPAPI.openUserVolume = function(sPath, sMachine, sUser, sMode, cbInit, done) * and return DiskAPI.FAIL.REVOKED; otherwise, there's no real protection of volume * integrity here. One of the challenges will be ensuring the list of revoked machine * IDs doesn't grow without bound. - * + * * When revoking, we should also be able to reuse the current vol by simply updating its * machine ID; there's no need to close and re-open the file (although assuming revocation * is a rare occurrence, it shouldn't much matter). @@ -338,17 +338,17 @@ HTTPAPI.openUserVolume = function(sPath, sMachine, sUser, sMode, cbInit, done) return; } } - + if (!vol) { vol = {fd: null, mode: sMode, path: sPath, machine: sMachine}; userVolumes[sUser] = vol; } - + var nResponse = 200; var sResponse = null; if (!vol.fd) { - + HTMLOut.logDebug('HTMLOut.openUserVolume("' + sPath + '")'); fs.open(sPath, "r+", function(err, fd) { @@ -406,9 +406,9 @@ HTTPAPI.readUserVolume = function(sPath, fd, aCHS, aAddr, done) { var pos = (aAddr[0] * (aCHS[1] * aCHS[2] * aCHS[3])) + (aAddr[1] * (aCHS[2] * aCHS[3])) + ((aAddr[2] - 1) * aCHS[3]); var len = (aAddr[3] * aCHS[3]); - + HTMLOut.logDebug('HTMLOut.readUserVolume("' + sPath + '"): pos: ' + pos + ', len: ' + len); - + var buf = new Buffer(len); fs.read(fd, buf, 0, len, pos, function(err, cbRead, buffer) { var nResponse = 200; @@ -423,7 +423,7 @@ HTTPAPI.readUserVolume = function(sPath, fd, aCHS, aAddr, done) /* * Replace the preceding line with this if you want to test how well the client deals with long I/O delays (eg, 10 seconds) * - setTimeout(function() { + setTimeout(function() { HTMLOut.logDebug("HTTPAPI.readUserVolume(): responding after 10000ms delay"); done(nResponse, sResponse); }, 10000); @@ -519,7 +519,7 @@ HTTPAPI.closeUserVolume = function(sPath, sMachine, sUser, done) /** * parseDiskValues(s, aDefaults) - * + * * @param {string} s * @param {Array.} a * @returns {Array.} @@ -546,7 +546,7 @@ HTTPAPI.parseDiskValues = function(s, a) HTTPAPI.processDiskAPI = function(req, res) { /* - * For every volume, we must maintain the active machine+user that currently has access. + * For every volume, we must maintain the active machine+user that currently has access. */ var nResponse = 400; // default to "Bad Request" var reqParms = req.method == "GET"? req.query : req.body; @@ -598,7 +598,7 @@ HTTPAPI.processDiskAPI = function(req, res) * Without the addition of "no-store", Chrome will assume that a previous response to * a previously seen URL can be re-used without hitting the server again, which would be * bad if the requested sector(s) had been written in the meantime. - * + * * Perhaps I should be using different HTTP verbs, or perhaps I should switch to sockets, * but in the meantime, this is absolutely necessary. */ @@ -642,7 +642,7 @@ HTTPAPI.processDiskAPI = function(req, res) }); return true; } - + res.status(nResponse).send(DiskAPI.FAIL.BADVOL); return true; }; @@ -659,7 +659,7 @@ HTTPAPI.processDumpAPI = function(req, res) var aCommand; var nResponse = 400; // default to "Bad Request" var sDisk, sFile, sFormat, fComments; - + if ((aCommand = HTTPAPI.hasAPICommand(req, DumpAPI.asDiskCommands))) { sDisk = aCommand[1]; @@ -669,11 +669,11 @@ HTTPAPI.processDumpAPI = function(req, res) * Allowing ".." in a path component is risky, unless we're running locally... */ if (sDisk.indexOf("..") < 0 || req.app.settings.port == 8088) { - + sFormat = req.query[DumpAPI.QUERY.FORMAT] || DumpAPI.FORMAT.JSON; fComments = (req.query[DumpAPI.QUERY.COMMENTS]? true : false); var mbHD = req.query[DumpAPI.QUERY.MBHD]; - + /* * TODO: Consider adding support for DiskDump's "exclusion" option to the API interface * (the command-line interface supports it). @@ -692,7 +692,7 @@ HTTPAPI.processDumpAPI = function(req, res) } } else if ((aCommand = HTTPAPI.hasAPICommand(req, DumpAPI.asFileCommands))) { - + sFile = aCommand[1]; HTMLOut.logDebug('HTTPAPI.processDumpAPI("' + sFile + '"): type=' + aCommand[0]); @@ -700,7 +700,7 @@ HTTPAPI.processDumpAPI = function(req, res) * Allowing ".." in a path component is too risky, unless we're running locally. */ if (sFile.indexOf("..") < 0 || req.app.settings.port == 8088) { - + sFormat = req.query[DumpAPI.QUERY.FORMAT] || DumpAPI.FORMAT.JSON; fComments = (req.query[DumpAPI.QUERY.COMMENTS]? true : false); var fDecimal; @@ -730,7 +730,7 @@ HTTPAPI.processDumpAPI = function(req, res) /** * dumpDisk(err, disk, res) - * + * * @param {Error} err * @param {DiskDump} disk * @param {Object} res @@ -794,7 +794,7 @@ HTTPAPI.processReportAPI = function(req, res) var sUser = req.body[ReportAPI.QUERY.USER]; var sType = req.body[ReportAPI.QUERY.TYPE]; var sData = req.body[ReportAPI.QUERY.DATA]; - + HTMLOut.logDebug('HTTPAPI.processReportAPI("' + sApp + '"): ver=' + sVer + ', url=' + sURL + ', type=' + sType); if (sApp && sVer && sType == ReportAPI.TYPE.BUG && sData) { @@ -879,7 +879,7 @@ HTTPAPI.createUserID = function(sUser, res) */ if (iVerified == 1 || iVerified <= 0 && asUsers[0] == net.GORT_COMMAND) { HTTPAPI.verifyUserID(asUsers[1], res, function doneVerifyUserID(iVerified, resultSecond, res) { - + HTMLOut.logDebug('HTTPAPI.doneVerifyUserID("' + asUsers[1] + '"): ' + iVerified); if (iVerified <= 0) { @@ -906,15 +906,15 @@ HTTPAPI.createUserID = function(sUser, res) /** * verifyUserID(sUser, res, done) - * + * * If a done() handler is specified, the first parameter it receives is iVerified, which * will be -1 if the "users.log" file hasn't been initialized yet, 0 if the key doesn't exist, * or a positive number representing the line number at which the key appears. - * + * * Moreover, when a done() handler is provided, it simply passes the response object (res) to * done(), which must actually send the response, based on the provided result; this function sends * a response only if done() is NOT provided. - * + * * @param {string} sUser * @param {Object} res is an Express response object (http://expressjs.com/api.html#res.status) * @param {function(number, Object, Object)} [done] @@ -923,7 +923,7 @@ HTTPAPI.createUserID = function(sUser, res) HTTPAPI.verifyUserID = function(sUser, res, done) { HTMLOut.logDebug('HTTPAPI.verifyUserID("' + sUser + '")'); - + /* * If a colon separator is present, this is an implicit REQ.CREATE call * (in fact, at present, PCjs does not issue any explicit REQ.CREATE calls). @@ -934,7 +934,7 @@ HTTPAPI.verifyUserID = function(sUser, res, done) var iVerified = -1; var sUserFile = path.join(sServerRoot, "/logs/users.log"); fs.readFile(sUserFile, {encoding: "utf8"}, function doneReadUserIDs(err, sData) { - + var sResCode = UserAPI.CODE.FAIL; var sResData = UserAPI.FAIL.VERIFY; if (err) { @@ -975,8 +975,8 @@ HTTPAPI.getUserDir = function(sUser) /** * createUserDir(sUser) - * - * TODO: Creation is relatively rare, so I'm lazy and use synchronous calls, but fix this someday. + * + * TODO: Creation is relatively rare, so I'm lazy and use synchronous calls, but fix this someday. * * @param {string} sUser * @return {boolean} true if successful, false if not @@ -1054,7 +1054,7 @@ HTTPAPI.loadUserData = function(sUser, sState, res) * Without the addition of "no-store", Chrome (and perhaps other browsers) will assume that * a previous response to a previously seen URL can be re-used without hitting the server * again, which would be bad if the requested state has been modified in the meantime. - * + * * Here's the scenario: the user loads a web page with a machine that uses server-side state, * the user changes the state of that machine and switches away from the machine (eg, clicks * a link to a different page), which causes the state to be updated on the server; then they diff --git a/my_modules/markout/lib/markout.js b/my_modules/markout/lib/markout.js index ee74bb5c7..93c9c953a 100644 --- a/my_modules/markout/lib/markout.js +++ b/my_modules/markout/lib/markout.js @@ -35,30 +35,30 @@ * * TODO: Consider adding support for GFM-style tables, as described [here](https://help.github.com/articles/github-flavored-markdown#tables); * this would be nice for a Markdown-based ASCII table, for example. - * + * * TODO: Consider adding support for GFM-style strike-through, as described [here](https://help.github.com/articles/github-flavored-markdown#strikethrough) - * + * * TODO: Consider adding support for anything in the Markdown spec that we don't currently support (but only features that I might actually want to use). */ "use strict"; -var path = require("path"); -var net = require("../../shared/lib/netlib"); -var proc = require("../../shared/lib/proclib"); -var str = require("../../shared/lib/strlib"); +var path = require("path"); +var net = require("../../shared/lib/netlib"); +var proc = require("../../shared/lib/proclib"); +var str = require("../../shared/lib/strlib"); /** * @class exports * @property {string} name * @property {string} version */ -var pkg = require("../../../package.json"); +var pkg = require("../../../package.json"); /** * fConsole controls diagnostic messages; it is false by default and can be overridden using the * setOptions() 'console' property. - * + * * @type {boolean} */ var fConsole = false; @@ -123,7 +123,7 @@ function MarkOut(sMD, sIndent, req, aParms, fDebug) /** * CLI() - * + * * Provides a command-line interface for the markout module * * Usage: @@ -147,7 +147,7 @@ MarkOut.CLI = function() { var fs = require("fs"); var path = require("path"); - + var fDebug = false; var args = proc.getArgs(); @@ -261,7 +261,7 @@ MarkOut.prototype.getMachines = function() /** * generateID(sText) - * + * * Generate an ID from the given text, by basically converting it to lower case, converting anything * that's not a letter or a digit to a hyphen (-), and stripping all leading and trailing hyphens from * the result. Furthermore, if the generated ID is not unique (among the set of ALL generated IDs), @@ -315,7 +315,7 @@ MarkOut.prototype.convertMD = function(sIndent) * to replace any \r\n sequences with \n. */ sMD = str.replaceArray(MarkOut.aHTMLEntities, sMD).replace(/\r\n/g, "\n").replace(/\r/g, "\n"); - + /* * Before performing the original comment-elimination step, a new step has been added that * allows blocks of Markdown to be excluded from the Markout process (eg, build instructions @@ -399,7 +399,7 @@ MarkOut.prototype.convertMD = function(sIndent) * Ready to convert all blocks now. */ sMD = this.convertMDBlocks(sMD, sIndent); - + /* * Post-processing hacks go here. First off, we would like all 
...
...
sequences * to become one single (unified) 
 sequence.
@@ -435,13 +435,13 @@ MarkOut.prototype.convertMDBlocks = function(sMD, sIndent)
 
     sMD = str.replaceArray({"":"h6>", "h#####>":"h5>", "h####>":"h4>", "h###>":"h3>", "h##>":"h2>", "h#>":"h1>"}, sMD);
-    
+
     /*
      * Convert all "Setext-style headers" (ie, series of equal-signs or dashes) to their  equivalents.
      */
     sMD = sMD.replace(/([^\n]+)\n([=-])[=-]*(\n|$)/g, "$1\n\n");
     sMD = str.replaceArray({"h=>":"h1>", "h->":"h2>"}, sMD);
-    
+
     /*
      * Auto-generate IDs for headings
      */
@@ -710,20 +710,20 @@ MarkOut.prototype.convertMDLines = function(s)
  * we strip the '#' and use the remainder of the link as the name of the anchor.  To reference a named
  * anchor from another link, you have to specify a path with '#' and the anchor name appended, in order
  * to distinguish an anchor name from an anchor reference.
- * 
+ *
  * Note that the need for named anchors is somewhat diminished now that I automatically generate IDs for
  * all heading tags (eg, 
); refer to the generateID() function that's used in convertMDBlocks().
- * 
+ *
  * Another extension to Markdown that I've added is detecting empty parentheses alongside a likely URL,
  * and automatically converting it to a link; eg:
- * 
+ *
  *      [http://www.ascii-code.com/]()
- *      
+ *
  * Also, if a URL contains any asterisks, we replace them with the current version number from "package.json".
  *
  * I prefer this solution over GFM's "autolinking" solution, which is too "loosey-goosey" for my taste
  * (see https://help.github.com/articles/github-flavored-markdown#url-autolinking).
- * 
+ *
  * TODO: Consider adding support for "reference"-style Markdown links.
  *
  * @this {MarkOut}
@@ -794,11 +794,11 @@ MarkOut.prototype.convertMDImageLinks = function(sBlock, sIndent)
              *      link:url[:width[:height]]
              *
              * If "link:" is specified, a URL is required, but image width and height are optional.
-             * 
+             *
              * Alternatively:
-             * 
+             *
              *      link:url:nogallery[:width[:height]]
-             *      
+             *
              * to disable the automatic "gallery-ification" of image links (an optional width and height
              * can still follow).
              */
@@ -814,11 +814,11 @@ MarkOut.prototype.convertMDImageLinks = function(sBlock, sIndent)
                  * If the image link (aMatch[2]) contains "static/" but the sURL is external, AND we're in
                  * "reveal mode", then transform sURL into a "static/" URL as well; encodeURL() will take care
                  * of the rest of the transformation.
-                 * 
+                 *
                  * This feature is used with READMEs like /pubs/pc/programming/README.md, where normally we
                  * want to link to documents stored on sites like archive.org, minuszerodegrees.net or bitsavers,
                  * unless you're in "reveal mode", in which case we'll serve up our own "backup copies".
-                 * 
+                 *
                  * The assumption here is that if we have "static" thumbs, then we should also have full "static"
                  * copies as well.
                  */
@@ -908,7 +908,7 @@ MarkOut.prototype.convertMDMachineLinks = function(sBlock)
      * We don't have the XML file open here, and I don't think it's worth the hit to open it.
      * Besides, the XML config file isn't necessarily on the same server (although whenever this
      * script is being used, it very likely is).
-     * 
+     *
      * TODO: Consider cracking open the XML file anyway, even though the Markdown module is supposed
      * to be non-blocking; I'd like to be smarter about defaults (eg, specifying "debugger" when the
      * XML file clearly needs it).
@@ -926,7 +926,7 @@ MarkOut.prototype.convertMDMachineLinks = function(sBlock)
         var sMachineFunc = "embed" + sMachine;
         var sMachineClass = sMachine.toLowerCase();
         var aMachineParms = aMatch[4].split(':');
-        var sMachineMessage = "(If you see this message, " + sMachine + "js may still be loading)";
+        var sMachineMessage = "(If you see this message, " + sMachine + "js is still loading, or JavaScript has been disabled)";
 
         var sMachineID = aMachineParms[0];
         var sMachineXSLFile = aMachineParms[1] || "";
@@ -957,11 +957,11 @@ MarkOut.prototype.convertMDMachineLinks = function(sBlock)
 
         /*
          * Now that we're providing all of the following machine information to addMachine(), we don't
-         * need to install the machine embed code here; processMachines() in HTMLOut will take care of that now. 
+         * need to install the machine embed code here; processMachines() in HTMLOut will take care of that now.
          *
         sReplacement += this.sIndent + '';
          */
-        
+
         sBlock = sBlock.replace(aMatch[0], sReplacement);
         reMachines.lastIndex = 0;       // reset lastIndex, since we just modified the string that reMachines is iterating over
         cMatches++;
@@ -987,17 +987,17 @@ MarkOut.prototype.convertMDMachineLinks = function(sBlock)
 
 /**
  * convertMDEmphasis(sBlock)
- * 
+ *
  * We look for sequences like **strength**, __strength__, *emphasis* and _emphasis_;
  * we convert the stronger (double-character) forms first, followed by the weaker
  * (single-character) forms, since we don't want to misconstrue the former as containing
  * the latter.
- * 
+ *
  * Also, standard Markdown says that "if you surround an * or _ with spaces, it’ll be
  * treated as a literal asterisk or underscore."  Well, we don't.  You can already escape
  * special characters with a backslash to make them literal, so I don't feel like
  * complicating the RegExps below to accommodate a syntax I don't use or want to support.
- * 
+ *
  * Also, for reasons noted in the code below, we don't support emphasis in the middle
  * of words.
  *
@@ -1009,17 +1009,17 @@ MarkOut.prototype.convertMDEmphasis = function(sBlock)
 {
     /*
      * Standard Markdown allows * or _ in the middle of a word, as in:
-     * 
+     *
      *      un*frigging*believable
-     *      
+     *
      * but we do not.  That's because a Markdown link like:
-     * 
+     *
      *      [my_modules](/my_modules/)
-     *      
+     *
      * would otherwise be misconstrued as containing emphasis (and it doesn't
      * matter whether we process emphasis BEFORE or AFTER links -- an HTML link
      * poses the same problem as a Markdown link).
-     * 
+     *
      * To resolve this, I require something non-alphanumeric to both precede AND
      * follow the emphasis characters.  I would expect that "something" to normally
      * be whitespace, but we make it a bit more flexible, so that you can do things
@@ -1103,4 +1103,4 @@ MarkOut.prototype.encodeWhitespace = function(sText)
 };
  */
 
-module.exports = MarkOut;
\ No newline at end of file
+module.exports = MarkOut;
diff --git a/my_modules/pcjs-client/lib/bus.js b/my_modules/pcjs-client/lib/bus.js
index a76fde17e..7f698ea92 100644
--- a/my_modules/pcjs-client/lib/bus.js
+++ b/my_modules/pcjs-client/lib/bus.js
@@ -34,15 +34,15 @@
 "use strict";
 
 if (typeof module !== 'undefined') {
-    var str = require("../../shared/lib/strlib");
-    var Component = require("../../shared/lib/component");
-    var Memory = require("./mem");
-    var State = require("./state");
+    var str         = require("../../shared/lib/strlib");
+    var Component   = require("../../shared/lib/component");
+    var Memory      = require("./mem");
+    var State       = require("./state");
 }
 
 /**
  * Bus(cpu, dbg)
- * 
+ *
  * The Bus component manages "physical" memory and I/O address spaces.
  *
  * The Bus component has no UI elements, so it does not require an init() handler,
@@ -81,7 +81,7 @@ function Bus(parmsBus, cpu, dbg)
 
     /*
      * Compute all the Bus memory block addressing values that we rely on, based on the width of the bus.
-     * 
+     *
      * Regarding this.blockTotal, we want to avoid address-overflow-detection expressions like:
      *
      *      iBlock < this.blockTotal? iBlock : 0
@@ -106,12 +106,12 @@ function Bus(parmsBus, cpu, dbg)
      *      this.blockLimit     Bus.BLOCK.LIMIT     0xfff
      *      this.blockTotal     Bus.BLOCK.TOTAL     ((this.addrLimit + this.blockSize) / this.blockSize) | 0
      *      this.blockMask      Bus.BLOCK.MASK      (this.blockTotal - 1)   (ie, 0xff)
-     *      
+     *
      * Note that the blockShift calculation below chooses a 4Kb physical memory block size for a 20-bit bus
      * (1Mb address space) and a 16Kb physical memory block for a 24-bit bus (16Mb address space).  This yields
      * a 256-block array for the smaller bus and a 1024-block array for the larger bus.  If we left the block
      * size at 4Kb in all cases, we'd end up with a 4096-block array for an 80286, which seems a bit excessive.
-     * 
+     *
      * I can't think of any reason why a coarser block granularity (of 16Kb) should hurt anything, other than
      * wasting a little memory for ROMs smaller than the block size.  Realize that this is strictly a physical
      * memory implementation detail, which should have no bearing on segment or page granularity of any future
@@ -138,11 +138,11 @@ function Bus(parmsBus, cpu, dbg)
      * WARNING: Unlike the (old) read and write memory notification functions, these support only one
      * pair of input/output functions per port.  A more sophisticated architecture could support a list
      * of chained functions across multiple components, but I doubt that will be necessary here.
-     * 
+     *
      * UPDATE: The Debugger now piggy-backs on these arrays to indicate ports for which it wants notification
      * of I/O.  In those cases, the registered component/function elements may or may not be set, but the following
      * additional element will be set:
-     * 
+     *
      *      [2]: true to break on I/O, false to ignore I/O
      *
      * The false case is important if fPortInputBreakAll and/or fPortOutputBreakAll is set, because it allows the
@@ -163,7 +163,7 @@ Component.subclass(Component, Bus);
 
 /**
  * initMemory()
- * 
+ *
  * Allocate enough (empty) Memory blocks to span the entire physical address space.
  *
  * @this {Bus}
@@ -192,7 +192,7 @@ Bus.prototype.reset = function()
 
 /**
  * addMemory(addr, size, fReadOnly, controller)
- * 
+ *
  * Adds new Memory blocks to the specified address range.  Any Memory blocks previously
  * added to that range must first be removed via removeMemory(); otherwise, you'll get
  * an allocation conflict error.  Moreover, the address range must start at a block-granular
@@ -228,7 +228,7 @@ Bus.prototype.addMemory = function(addr, size, fReadOnly, controller)
 
 /**
  * cleanMemory(addr, size)
- * 
+ *
  * @this {Bus}
  * @param {number} addr
  * @param {number} size
@@ -318,7 +318,7 @@ Bus.prototype.setMemoryAccess = function(addr, size, afn)
  * removeMemory(addr, size)
  *
  * Replaces every block in the specified address range with empty Memory blocks that will ignore all reads/writes.
- * 
+ *
  * @this {Bus}
  * @param {number} addr
  * @param {number} size
@@ -410,7 +410,7 @@ Bus.prototype.setWordDirect = function(addr, w)
  * All dirty blocks will be stored in a single array, as pairs of block numbers and data arrays, like so:
  *
  *      [iBlock0, [dw0, dw1, ...], iBlock1, [dw0, dw1, ...], ...]
- *      
+ *
  * In a normal 4Kb block, there will be 1K DWORD values in the data array.  Remember that each DWORD is a signed 32-bit
  * integer (because they are formed using bit-wise operator rather than floating-point math operators), so don't be
  * surprised to see negative numbers in the data.
@@ -459,7 +459,7 @@ Bus.prototype.saveMemory = function()
  * component to be restored, all those blocks (and their attributes) should be in place now.
  *
  * See saveMemory() for a description of how the memory block contents are saved.
- * 
+ *
  * @this {Bus}
  * @param {Array} a
  * @return {boolean} true if successful, false if not
@@ -490,7 +490,7 @@ Bus.prototype.restoreMemory = function(a)
 
 /**
  * addMemoryBreakpoint(addr, fWrite)
- * 
+ *
  * @this {Bus}
  * @param {number} addr
  * @param {boolean} fWrite is true for a memory write breakpoint, false for a memory read breakpoint
@@ -505,7 +505,7 @@ Bus.prototype.addMemoryBreakpoint = function(addr, fWrite)
 
 /**
  * removeMemoryBreakpoint(addr, fWrite)
- * 
+ *
  * @this {Bus}
  * @param {number} addr
  * @param {boolean} fWrite is true for a memory write breakpoint, false for a memory read breakpoint
@@ -540,7 +540,7 @@ Bus.prototype.addPortInputBreak = function(port)
 
 /**
  * addPortInputNotify(start, end, component, fn)
- * 
+ *
  * Add a port input-notification handler to the list of such handlers.
  *
  * @this {Bus}
@@ -565,7 +565,7 @@ Bus.prototype.addPortInputNotify = function(start, end, component, fn)
 
 /**
  * addPortInputTable(component, table, offset)
- * 
+ *
  * Add port input-notification handlers from the specified table (a batch version of addPortInputNotify)
  *
  * @this {Bus}
@@ -578,7 +578,7 @@ Bus.prototype.addPortInputTable = function(component, table, offset)
     if (offset === undefined) offset = 0;
     for (var port in table) {
         /*
-         * JavaScript coerces property keys to strings, so we use parseInt() to coerce them back to numbers. 
+         * JavaScript coerces property keys to strings, so we use parseInt() to coerce them back to numbers.
          */
         port = parseInt(port, 10);
         this.addPortInputNotify(port + offset, port + offset, component, table[port]);
@@ -587,7 +587,7 @@ Bus.prototype.addPortInputTable = function(component, table, offset)
 
 /**
  * checkPortInputNotify(port, addrFrom)
- * 
+ *
  * @this {Bus}
  * @param {number} port
  * @param {number} [addrFrom] is the EIP value at the time of the input
@@ -619,7 +619,7 @@ Bus.prototype.checkPortInputNotify = function(port, addrFrom)
 
 /**
  * removePortInputNotify(start, end, component, fn)
- * 
+ *
  * Remove a port input-notification handler from the list of such handlers (to be ENABLED later if needed)
  *
  * @this {Bus}
@@ -660,7 +660,7 @@ Bus.prototype.addPortOutputBreak = function(port)
 
 /**
  * addPortOutputNotify(start, end, component, fn)
- * 
+ *
  * Add a port output-notification handler to the list of such handlers.
  *
  * @this {Bus}
@@ -685,7 +685,7 @@ Bus.prototype.addPortOutputNotify = function(start, end, component, fn)
 
 /**
  * addPortOutputTable(component, table, offset)
- * 
+ *
  * Add port output-notification handlers from the specified table (a batch version of addPortOutputNotify)
  *
  * @this {Bus}
@@ -698,7 +698,7 @@ Bus.prototype.addPortOutputTable = function(component, table, offset)
     if (offset === undefined) offset = 0;
     for (var port in table) {
         /*
-         * JavaScript converts property keys to strings (brilliant), so we use parseInt() to convert them back to numbers. 
+         * JavaScript converts property keys to strings (brilliant), so we use parseInt() to convert them back to numbers.
          */
         port = parseInt(port, 10);
         this.addPortOutputNotify(port + offset, port + offset, component, table[port]);
@@ -707,7 +707,7 @@ Bus.prototype.addPortOutputTable = function(component, table, offset)
 
 /**
  * checkPortOutputNotify(port, bOut, addrFrom)
- * 
+ *
  * @this {Bus}
  * @param {number} port
  * @param {number} bOut
@@ -734,7 +734,7 @@ Bus.prototype.checkPortOutputNotify = function(port, bOut, addrFrom)
 
 /**
  * removePortOutputNotify(start, end, component, fn)
- * 
+ *
  * Remove a port output-notification handler from the list of such handlers (to be ENABLED later if needed)
  *
  * @this {Bus}
diff --git a/my_modules/pcjs-client/lib/chipset.js b/my_modules/pcjs-client/lib/chipset.js
index dc596aa84..dbaa8fe36 100644
--- a/my_modules/pcjs-client/lib/chipset.js
+++ b/my_modules/pcjs-client/lib/chipset.js
@@ -34,11 +34,11 @@
 "use strict";
 
 if (typeof module !== 'undefined') {
-    var str = require("../../shared/lib/strlib");
-    var usr = require("../../shared/lib/usrlib");
-    var web = require("../../shared/lib/weblib");
-    var Component = require("../../shared/lib/component");
-    var State = require("./state");
+    var str         = require("../../shared/lib/strlib");
+    var usr         = require("../../shared/lib/usrlib");
+    var web         = require("../../shared/lib/weblib");
+    var Component   = require("../../shared/lib/component");
+    var State       = require("./state");
 }
 
 /**
@@ -52,12 +52,12 @@ if (typeof module !== 'undefined') {
  *      sound:          true to enable (experimental) sound support (default); false to disable
  *      scaleTimers:    true to divide timer cycle counts by the CPU's cycle multiplier (default is false)
  *      fdrives:        0-4 floppy drives (default is 2 if no sw1 value provided)
- *      monitor:        none|tv|color|mono (default is mono if no sw1 value provided) 
+ *      monitor:        none|tv|color|mono (default is mono if no sw1 value provided)
  *      rtcDate:        optional RTC date to be used on resets; use the ISO 8601 format; eg: "2014-10-01T08:00:00-0700"
  *
  * The conventions used for the sw1 and sw2 strings are that the left-most character represents DIP switch [1],
  * the right-most character represents DIP switch [8], and "1" means the DIP switch is ON and "0" means it is OFF.
- * 
+ *
  * Internally, we convert the above strings into binary values that the 8255A PPI returns, where DIP switch [1]
  * is bit 0 and DIP switch [8] is bit 7, and 0 indicates the switch is ON and 1 indicates it is OFF.
  *
@@ -68,7 +68,7 @@ if (typeof module !== 'undefined') {
  *      SW1[3,4]  (bits 3-2)  "xx11xxxx" (00): 16Kb, "xx01xxxx" (01): 32Kb,  "xx10xxxx" (10): 48Kb,  "xx00xxxx" (11): 64Kb
  *      SW1[5,6]  (bits 5-4)  "xxxx11xx" (00): none, "xxxx01xx" (01): tv,    "xxxx10xx" (10): color, "xxxx00xx" (11): mono
  *      SW1[7,8]  (bits 7-6)  "xxxxxx11" (00): 1 FD, "xxxxxx01" (01): 2 FD,  "xxxxxx10" (10): 3 FD,  "xxxxxx00" (11): 4 FD
- *      
+ *
  * Note: FD refers to floppy drive, and IPL refers to an "Initial Program Load" floppy drive.
  *
  *      SW2[1-4]    (bits 3-0)  "NNNNxxxx": number of 32Kb blocks of I/O expansion RAM present
@@ -127,7 +127,7 @@ if (typeof module !== 'undefined') {
  * NMI Mask Register or the state that the BIOS "POST" (Power-On Self-Test) sets.
  *
  * [2] These devices cannot be used together since their port addresses overlap.
- * 
+ *
  *      MODEL_5170      Description
  *      ----------      -----------
  *          070 [3]     CMOS Address                                    ChipSet.CMOS.ADDR.PORT
@@ -135,7 +135,7 @@ if (typeof module !== 'undefined') {
  *          0F0         Coprocessor Clear Busy (output 0x00)
  *          0F1         Coprocessor Reset (output 0x00)
  *      1F0-1F7         Hard Drive Controller (ATC)                     [see the HDC component]
- *          
+ *
  * [3] Port 0x70 doubles as the NMI Mask Register: output a CMOS address with bit 7 clear to enable NMI
  * or with bit 7 set to disable NMI (apparently the inverse of the older NMI Mask Register at port 0xA0).
  * Also, apparently unlike previous models, the MODEL_5170 POST leaves NMI enabled.  And fortunately, the
@@ -151,12 +151,12 @@ function ChipSet(parmsChipSet)
 
     this.model = parmsChipSet['model'];
     this.model = (this.model !== undefined? parseInt(this.model, 10) : ChipSet.MODEL_5150);
-    
+
     /*
      * SW1 describes the number of floppy drives, the amount of base memory, the primary monitor type,
      * and (on the MODEL_5160) whether or not a coprocessor is installed.  If no SW1 settings are provided,
      * we look for individual 'fdrives' and 'monitor' settings and build a default SW1 value.
-     * 
+     *
      * The defaults below select max memory, monochrome monitor (EGA monitor for MODEL_5170), and two floppies.
      * Don't get too excited about "max memory" either: on a MODEL_5150, the max was 64Kb, and on a MODEL_5160,
      * the max was 256Kb.  However, the RAM component is free to install as much base memory as it likes,
@@ -166,7 +166,7 @@ function ChipSet(parmsChipSet)
      * required to boot is therefore 32Kb.  Whether that's actually enough to run any or all versions of PC-DOS is
      * a separate question.  FYI, with only 16Kb, the ROM BIOS will still try to boot, and fail miserably.
      */
-    this.sw1Init = 0; 
+    this.sw1Init = 0;
     var sw1 = parmsChipSet['sw1'];
     if (sw1) {
         this.sw1Init = this.parseSwitches(sw1, ChipSet.PPI_SW.MEMORY.X4 | ChipSet.PPI_SW.MONITOR.MONO);
@@ -182,12 +182,12 @@ function ChipSet(parmsChipSet)
             this.sw1Init |= (ChipSet.aMonitorSwitches[sMonitor] << ChipSet.PPI_SW.MONITOR.SHIFT);
         }
     }
-                
+
     /*
      * SW2 describes the number of 32Kb blocks of I/O expansion RAM that's present in the system. The MODEL_5150 ROM BIOS
      * only checked/supported the first four switches, so the maximum amount of additional RAM specifiable was 15 * 32Kb,
      * or 480Kb.  With a maximum of 64Kb on the motherboard, the MODEL_5150 ROM BIOS could support a grand total of 544Kb.
-     * 
+     *
      * For MODEL_5160 (PC XT) and up, memory expansion cards had their own configuration switches, and the motherboard SW2
      * switches for I/O expansion RAM were eliminated.  Instead, the ROM BIOS scans the entire address space (up to 0xA0000)
      * looking for additional memory.  As a result, the only mechanism we provide for adding RAM (above the maximum of 256Kb
@@ -205,20 +205,20 @@ function ChipSet(parmsChipSet)
     if (this.model >= ChipSet.MODEL_5170) {
         this.cDMACs = this.cPICs = 2;
     }
-    
+
     this.fScaleTimers = parmsChipSet['scaleTimers'] || false;
     this.sRTCDate = parmsChipSet['rtcDate'];
 
     /*
      * Here, I'm finally getting around to trying the Web Audio API.  Fortunately, based on what little I know about
      * sound generation, using the API to make the same noises as the IBM PC speaker should be straightforward.
-     * 
+     *
      * To start, we create an audio context, unless the 'sound' parameter has been explicitly set to false.
-     * 
+     *
      * From:
-     * 
+     *
      *      http://developer.apple.com/library/safari/#documentation/AudioVideo/Conceptual/Using_HTML5_Audio_Video/PlayingandSynthesizingSounds/PlayingandSynthesizingSounds.html
-     *      
+     *
      * "Similar to how HTML5 canvas requires a context on which lines and curves are drawn, Web Audio requires an audio context
      *  on which sounds are played and manipulated. This context will be the parent object of further audio objects to come....
      *  Your audio context is typically created when your page initializes and should be long-lived. You can play multiple sounds
@@ -233,7 +233,7 @@ function ChipSet(parmsChipSet)
             if (DEBUG) this.log("webkitAudioContext not available");
         }
     }
-    
+
     /*
      * I used to defer ChipSet's reset() to powerUp(), which then gave us the option of doing either
      * reset() OR restore(), instead of both.  However, on MODEL_5170 machines, the initial CMOS data
@@ -241,7 +241,7 @@ function ChipSet(parmsChipSet)
      * HDC calls setCMOSDriveType() or RAM calls addCMOSMemory()), the CMOS will be ready to take their calls.
      */
     this.reset();
-    
+
     this.setReady();
 }
 
@@ -249,7 +249,7 @@ Component.subclass(Component, ChipSet);
 
 /*
  * Supported Models
- * 
+ *
  * Unless otherwise noted, all BIOS references refer to the *original* BIOS released with each model
  */
 ChipSet.MODEL_5150      = 5150;         // used in reference to the 1st 5150 BIOS, dated Apr 24, 1981
@@ -287,14 +287,14 @@ ChipSet.aMonitorSwitches = {
 
 /*
  *  8237A DMA Controller (DMAC) I/O ports
- * 
+ *
  *  MODEL_5150 and up uses DMA channel 0 for memory refresh cycles and channel 2 for the FDC
  *  MODEL_5160 and up uses DMA channel 3 for HDC transfers (XTC only)
  *  MODEL_5170 and up contain *two* DMA Controllers, which we refer to as DMA0 and DMA1; channel 4
- *  on DMA1 is used to "cascade" channels 0-3 from DMA0, so only channels 5-7 are available on DMA1 
- *  
+ *  on DMA1 is used to "cascade" channels 0-3 from DMA0, so only channels 5-7 are available on DMA1
+ *
  *  QUESTION: Why does the MODEL_5150 ROM BIOS set the page register for channel 1 (port 0x83) to zero?
- * 
+ *
  *  For FDC DMA notes, refer to:        http://wiki.osdev.org/ISA_DMA
  *  For general DMA notes, refer to:    http://www.freebsd.org/doc/en/books/developers-handbook/dma.html
  */
@@ -322,7 +322,7 @@ ChipSet.DMA0 = {
         CH1_PAGE:       0x83,   // OUT: DMA channel 1 page register
         CH0_PAGE:       0x87    // OUT: DMA channel 0 page register (unusable; See "The Inside Out" book, p.246)
     }
-};    
+};
 ChipSet.DMA1 = {
     INDEX:              1,
     PORT: {
@@ -385,9 +385,9 @@ ChipSet.DMA_HDC       = 0x03;   // DMA channel assigned to the Hard Drive Contro
 
 /*
  * 8259A Programmable Interrupt Controller (PIC) I/O ports
- * 
+ *
  * Internal registers:
- * 
+ *
  *      ICW1    Initialization Command Word 1 (sent to port ChipSet.PIC_LO)
  *      ICW2    Initialization Command Word 2 (sent to port ChipSet.PIC_HI)
  *      ICW3    Initialization Command Word 3 (sent to port ChipSet.PIC_HI)
@@ -396,18 +396,18 @@ ChipSet.DMA_HDC       = 0x03;   // DMA channel assigned to the Hard Drive Contro
  *      IRR     Interrupt Request Register
  *      ISR     Interrupt Service Register
  *      IRLow   (IR having lowest priority; IR+1 will have highest priority; default is 7)
- *      
+ *
  * Note that ICW2 effectively contains the starting IDT vector number (ie, for IRQ 0),
  * which must be multiplied by 4 to calculate the vector offset, since every vector is 4 bytes long.
- *  
+ *
  * Also, since the low 3 bits of ICW2 are ignored in 8086/8088 mode (ie, they are effectively
  * treated as zeros), this means that the starting IDT vector can only be a multiple of 8.
  *
  * So, if ICW2 is set to 0x08, the starting vector number (ie, for IRQ 0) will be 0x08, and the
  * 4-byte address for the corresponding ISR will be located at offset 0x20 in the real-mode IDT.
- *  
+ *
  * ICW4 is typically set to 0x09, indicating 8086 mode, non-automatic EOI, buffered/slave mode.
- *  
+ *
  * QUESTION: Why did the original ROM BIOS choose buffered/slave over buffered/master?  Did it simply
  * not matter in pre-AT systems with only one PIC, or am I misreading something?
  *
@@ -465,16 +465,16 @@ ChipSet.PIC_HI = {              // ChipSet.PIC1.PORT_HI or ChipSet.PIC2.PORT_HI
 /*
  * The priorities of IRQs 0-7 are normally high to low, unless the master PIC has been reprogrammed.
  * Also, if a slave PIC is present, the priorities of IRQs 8-15 fall between the priorities of IRQs 1 and 3.
- * 
+ *
  * As the MODEL_5170 TechRef states:
- * 
+ *
  *      "Interrupt requests are prioritized, with IRQ9 through IRQ12 and IRQ14 through IRQ15 having the
  *      highest priority (IRQ9 is the highest) and IRQ3 through IRQ7 having the lowest priority (IRQ7 is
  *      the lowest).
- *      
+ *
  *      Interrupt 13 (IRQ.COPROC) is used on the system board and is not available on the I/O channel.
  *      Interrupt 8 (IRQ.RTC) is used for the real-time clock."
- *      
+ *
  * This priority scheme is a byproduct of IRQ8 through IRQ15 (slave PIC interrupts) being tied to IRQ2 of
  * the master PIC.  As a result, the two other system board interrupts, IRQ0 and IRQ1, continue to have the
  * highest priority, by default.
@@ -495,7 +495,7 @@ ChipSet.IRQ = {
 };
 
 /*
- * 8253 Programmable Interval Timer (PIT) I/O ports 
+ * 8253 Programmable Interval Timer (PIT) I/O ports
  */
 ChipSet.TIMER0 = {
     INDEX:              0,
@@ -538,10 +538,10 @@ ChipSet.TIMER_TICKS_PER_SEC = 1193181;
 
 /*
  * 8255A Programmable Peripheral Interface (PPI) I/O ports, for Cassette/Speaker/Keyboard/SW1/etc
- * 
+ *
  * Normally, 0x99 is written to PPI_CTRL.PORT, indicating that PPI_A.PORT and PPI_C.PORT are INPUT ports
  * and PPI_B.PORT is an OUTPUT port.
- * 
+ *
  * However, the MODEL_5160 ROM BIOS initially writes 0x89 instead, making PPI_A.PORT an OUTPUT port.
  * I'm guessing that's just part of some "diagnostic mode", because all it writes to PPI_A.PORT are a series
  * of "checkpoint" values (ie, 0x01, 0x02, and 0x03) before updating PPI_CTRL.PORT with the usual 0x99.
@@ -584,7 +584,7 @@ ChipSet.PPI_CTRL = {            // this.bPPICtrl
 
 /*
  * On the MODEL_5150, the following PPI_SW bits are exposed through PPI_A.
- * 
+ *
  * On the MODEL_5160, either the low or high 4 bits are exposed through PPI_C.SW, if PPI_B.ENABLE_SW_HI is clear or set.
  */
 ChipSet.PPI_SW = {
@@ -617,27 +617,27 @@ ChipSet.PPI_SW = {
 
 /*
  * 8042 Keyboard Controller I/O ports (MODEL_5170)
- * 
+ *
  * On the MODEL_5170, port 0x60 is designated KBC.DATA rather than PPI_A, although the BIOS also refers to it
  * as "PORT_A: 8042 KEYBOARD SCAN/DIAG OUTPUTS").  This is the 8042's output buffer and should be read only when
  * KBC.STATUS.OUTBUFF_FULL is set.
- * 
+ *
  * Similarly, port 0x61 is designated KBC.RWREG rather than PPI_B; the BIOS also refers to it as "PORT_B: 8042
  * READ WRITE REGISTER", but it is not otherwise discussed in the MODEL_5170 TechRef's 8042 documentation.
  * There are brief references to bits 0 and 1 (KBC.RWREG.CLK_TIMER2 and KBC.RWREG.SPK_TIMER2), and the BIOS sets
  * bits 2-7 to "DISABLE PARITY CHECKERS" (principally KBC.RWREG.DISABLE_CHK, which are bits 2 and 3); why the BIOS
  * also sets bits 4-7 (or if those bits are even settable) is unclear, since it uses 11111100B rather than defined
  * constants.
- * 
+ *
  * The bottom line: on a MODEL_5170, port 0x61 is still used for speaker control and parity checking, so we use
  * the same register (bPPIB) but install different I/O handlers.  It's also bi-directional: at one point, the BIOS
  * reads KBC.RWREG.REFRESH_BIT (bit 4) to verify that it's alternating.
- * 
+ *
  * PPI_C and PPI_CTRL don't seem to be documented or used by the MODEL_5170 BIOS, so I'm assuming they're obsolete.
- * 
+ *
  * NOTE: For more information on the 8042 Controller, including information on undocumented commands, refer to the
  * documents in /devices/pc/keyboard/, as well as the following websites:
- * 
+ *
  *      http://halicery.com/8042/8042_INTERN_TXT.htm
  *      http://www.os2museum.com/wp/?p=589 ("IBM PC/AT 8042 Keyboard Controller Commands")
  */
@@ -649,7 +649,7 @@ ChipSet.KBC = {
             PC_MODE:    0x20,
             NO_CLOCK:   0x10,   // disable keyboard by driving "clock" line low
             NO_INHIBIT: 0x08,   // disable inhibit function
-            SYS_FLAG:   0x04,   // this value is propagated to ChipSet.KBC.STATUS.SYS_FLAG 
+            SYS_FLAG:   0x04,   // this value is propagated to ChipSet.KBC.STATUS.SYS_FLAG
             INT_ENABLE: 0x01    // generate an interrupt when the controller places data in the output buffer
         },
         SELF_TEST: {            // result of ChipSet.KBC.CMD.SELF_TEST command (0xAA)
@@ -695,7 +695,7 @@ ChipSet.KBC = {
     CMD: {                      // this.b8042InBuff (on write to port 0x64, interpret this as a CMD)
         PORT:           0x64,
         READ_CMD:       0x20,
-        WRITE_CMD:      0x60,   // followed by a command byte written to KBC.DATA.PORT (see KBC.DATA.CMD) 
+        WRITE_CMD:      0x60,   // followed by a command byte written to KBC.DATA.PORT (see KBC.DATA.CMD)
         SELF_TEST:      0xAA,   // self-test (KBC.DATA.SELF_TEST.OK is placed in the output buffer if no errors)
         INTF_TEST:      0xAB,   // interface test
         DIAG_DUMP:      0xAC,   // diagnostic dump
@@ -723,9 +723,9 @@ ChipSet.KBC = {
 
 /*
  * MC146818A RTC/CMOS Ports (MODEL_5170)
- * 
+ *
  * Write a CMOS address to ChipSet.CMOS.ADDR.PORT, then read/write data from/to ChipSet.CMOS.DATA.PORT.
- * 
+ *
  * The ADDR port also controls NMI: write an address with bit 7 clear to enable NMI or set to disable NMI.
  */
 ChipSet.CMOS = {
@@ -759,7 +759,7 @@ ChipSet.CMOS = {
         EXTMEM2_LO:     0x30,
         EXTMEM2_HI:     0x31,
         CENTURY_DATE:   0x32,   // BCD value for the current century (eg, 0x19 for 20th century, 0x20 for 21st century)
-        BOOT_INFO:      0x33,   // 0x80 if 128Kb expansion memory installed, 0x40 if Setup Utility wants an initial setup message 
+        BOOT_INFO:      0x33,   // 0x80 if 128Kb expansion memory installed, 0x40 if Setup Utility wants an initial setup message
         MASK:           0x3F,
         TOTAL:          0x40,
         NMI_DISABLE:    0x80
@@ -810,7 +810,7 @@ ChipSet.CMOS = {
         DSHD:           2       // double-sided high-density drive (96 TPI, 80 tracks, 1.2Mb max)
     },
     /*
-     * HDRIVE types are defined by table in the HDC component, which uses setCMOSDriveType() to update the CMOS 
+     * HDRIVE types are defined by table in the HDC component, which uses setCMOSDriveType() to update the CMOS
      */
     HDRIVE: {                   // abCMOSData[ChipSet.CMOS.ADDR.HDRIVE]
         D0_MASK:        0xF0,   // Drive 0 type in high nibble
@@ -831,10 +831,10 @@ ChipSet.CMOS = {
  *
  * The MODEL_5170 TechRef lists 0x80-0x9F as the range for DMA page registers, but that seems a bit
  * overbroad; at one point, it says:
- * 
+ *
  *      "I/O address hex 080 is used as a diagnostic-checkpoint port or register.
  *      This port corresponds to a read/write register in the DMA page register (74LS6I2)."
- * 
+ *
  * 0x80 is the neighborhood, but that particular port is not documented as a DMA page register.
  * We'll refer to it as manufacturing port (see bMFGData).  Be aware that the MODEL_5170 BIOS is littered
  * with manufacturing test ("MFG_TST") code which, if enabled, writes to other DMA page registers,
@@ -910,7 +910,7 @@ ChipSet.prototype.setBinding = function(sHTMLClass, sHTMLType, sBinding, control
 
 /**
  * initBus(cmp, bus, cpu, dbg)
- * 
+ *
  * @this {ChipSet}
  * @param {Computer} cmp
  * @param {Bus} bus
@@ -928,7 +928,7 @@ ChipSet.prototype.initBus = function(cmp, bus, cpu, dbg)
      * This divisor is invariant, so we calculate it as soon as we're able to query the CPU's base speed.
      */
     this.nTicksDivisor = Math.round(cpu.getCyclesPerSecond() / ChipSet.TIMER_TICKS_PER_SEC);
-    
+
     bus.addPortInputTable(this, ChipSet.aPortInput);
     bus.addPortOutputTable(this, ChipSet.aPortOutput);
     if (this.model < ChipSet.MODEL_5170) {
@@ -961,7 +961,7 @@ ChipSet.prototype.initBus = function(cmp, bus, cpu, dbg)
 
 /**
  * powerUp(data, fRepower)
- * 
+ *
  * @this {ChipSet}
  * @param {Object|null} data
  * @param {boolean} [fRepower]
@@ -981,7 +981,7 @@ ChipSet.prototype.powerUp = function(data, fRepower)
 
 /**
  * powerDown(fSave)
- * 
+ *
  * @this {ChipSet}
  * @param {boolean} fSave
  * @return {Object|boolean}
@@ -993,7 +993,7 @@ ChipSet.prototype.powerDown = function(fSave)
 
 /**
  * reset(fSoft)
- * 
+ *
  * @this {ChipSet}
  * @param {boolean} [fSoft] is true if "soft" reset, otherwise "hard" reset (see below for details)
  */
@@ -1038,7 +1038,7 @@ ChipSet.prototype.reset = function(fSoft)
     this.bPPIC = undefined;         // tracks writes to port 0x62, in case PPI_CTRL.C_IN_LO or PPI_CTRL.C_IN_HI is not set
     this.bPPICtrl = undefined;      // tracks writes to port 0x63 (eg, 0x99); read-only
     this.bNMI = ChipSet.NMI.DISABLE;// tracks writes to the NMI Mask Register
-    
+
     /*
      * ChipSet state introduced by the MODEL_5170
      */
@@ -1050,13 +1050,13 @@ ChipSet.prototype.reset = function(fSoft)
          * the subsequent data byte is saved in b8042OutPort.
          *
          * TODO: Consider a UI for the Keyboard INHIBIT switch.  By default, our keyboard is never inhibited
-         * (ie, locked).  Also, note that the hardware changes this bit only when new data is sent to b8042OutBuff. 
+         * (ie, locked).  Also, note that the hardware changes this bit only when new data is sent to b8042OutBuff.
          */
         this.b8042Status = ChipSet.KBC.STATUS.NO_INHIBIT;
         this.b8042InBuff = 0;
         this.b8042CmdData = ChipSet.KBC.DATA.CMD.NO_CLOCK;
         this.b8042OutBuff = 0;
-        
+
         /*
          * TODO: Provide more control over these 8042 "Input Port" bits (eg, the keyboard lock)
          */
@@ -1068,7 +1068,7 @@ ChipSet.prototype.reset = function(fSoft)
 
         this.bMFGData = 0;
         this.abDMAPageSpare = new Array(7);
-        
+
         this.bCMOSAddr = 0;         // NMI is enabled, since the ChipSet.CMOS.ADDR.NMI_DISABLE bit is not set in bCMOSAddr
 
         /*
@@ -1080,10 +1080,10 @@ ChipSet.prototype.reset = function(fSoft)
         if (!fSoft) this.abCMOSData = new Array(ChipSet.CMOS.ADDR.TOTAL);
 
         this.initRTCDate(this.sRTCDate);
-        
+
         /*
          * initCMOSData() will initialize a variety of "legacy" CMOS bytes, but it will NOT overwrite any memory
-         * size or hard drive type information that might have been set, via addCMOSMemory() or setCMOSDriveType(). 
+         * size or hard drive type information that might have been set, via addCMOSMemory() or setCMOSDriveType().
          */
         this.initCMOSData();
     }
@@ -1100,22 +1100,22 @@ ChipSet.prototype.reset = function(fSoft)
 
 /**
  * initRTCDate(sDate)
- * 
+ *
  * Initialize the RTC portion of the CMOS registers to match the specified date/time (or if none is specified,
  * the current date/time).  The date/time should be expressed in the ISO 8601 format; eg: "2011-10-10T14:48:00".
- * 
+ *
  * NOTE: There are two approaches we could take here: always store the RTC bytes in binary, and convert them
  * to/from BCD on-demand (ie, as the simulation reads/writes the CMOS RTC registers); or init/update them in the
  * format specified by CMOS_STATUSB.BINARY (1 for binary, 0 for BCD).  Both approaches require BCD conversion
  * functions, but the former seems more efficient, in part because the periodic calls to updateRTCDate() won't
  * require any conversions.
- * 
+ *
  * We take the same approach with the CMOS_STATUSB.HOUR24 setting: internally, we always operate in 24-hour mode,
  * but externally, we convert the RTC hour values to the 12-hour format as needed.
- * 
+ *
  * Thus, all I/O to the RTC bytes must be routed through the getRTCByte() and setRTCByte() functions, to ensure
  * that all the necessary on-demand conversions occur.
- * 
+ *
  * @this {ChipSet}
  * @param {string} [sDate]
  */
@@ -1125,10 +1125,10 @@ ChipSet.prototype.initRTCDate = function(sDate)
      * NOTE: I've already been burned once by a JavaScript library function that did NOT treat an undefined
      * parameter (ie, a parameter === undefined) the same as an omitted parameter (eg, the async parameter in
      * xmlHTTP.open() in IE), so I'm taking no chances here: if sDate is undefined, then explicitly call Date()
-     * with no parameters. 
+     * with no parameters.
      */
     var date = sDate? new Date(sDate) : new Date();
-    
+
     /*
      * Example of a valid Date string:
      *
@@ -1147,7 +1147,7 @@ ChipSet.prototype.initRTCDate = function(sDate)
     } else if (sDate) {
         this.println("CMOS date: " + date);
     }
-    
+
     this.abCMOSData[ChipSet.CMOS.ADDR.RTC_SEC] = date.getSeconds();
     this.abCMOSData[ChipSet.CMOS.ADDR.RTC_SEC_ALRM] = 0;
     this.abCMOSData[ChipSet.CMOS.ADDR.RTC_MIN] = date.getMinutes();
@@ -1160,9 +1160,9 @@ ChipSet.prototype.initRTCDate = function(sDate)
     var nYear = date.getFullYear();
     this.abCMOSData[ChipSet.CMOS.ADDR.RTC_YEAR] = nYear % 100;
     var nCentury = (nYear / 100);
-    this.abCMOSData[ChipSet.CMOS.ADDR.CENTURY_DATE] = (nCentury % 10) | ((nCentury / 10) << 4); 
+    this.abCMOSData[ChipSet.CMOS.ADDR.CENTURY_DATE] = (nCentury % 10) | ((nCentury / 10) << 4);
     this.nCyclesCMOSLastUpdate = -1;
-    
+
     this.abCMOSData[ChipSet.CMOS.ADDR.RTC_STATUSA] = 0x26;                          // hard-coded default; refer to ChipSet.CMOS.STATUSA.DV and ChipSet.CMOS.STATUSA.RS
     this.abCMOSData[ChipSet.CMOS.ADDR.RTC_STATUSB] = ChipSet.CMOS.STATUSB.HOUR24;   // default to BCD mode (ChipSet.CMOS.STATUSB.BINARY not set)
     this.abCMOSData[ChipSet.CMOS.ADDR.RTC_STATUSC] = 0x00;
@@ -1171,16 +1171,16 @@ ChipSet.prototype.initRTCDate = function(sDate)
 
 /**
  * getRTCByte(iRTC)
- * 
+ *
  * @param {number} iRTC
  * @return {number} b
  */
 ChipSet.prototype.getRTCByte = function(iRTC)
 {
     Component.assert(iRTC >= 0 && iRTC <= ChipSet.CMOS.ADDR.RTC_STATUSD);
-    
+
     var b = this.abCMOSData[iRTC];
-    
+
     if (iRTC < ChipSet.CMOS.ADDR.RTC_STATUSA) {
         var f12HourValue = false;
         if (iRTC == ChipSet.CMOS.ADDR.RTC_HOUR || iRTC == ChipSet.CMOS.ADDR.RTC_HOUR_ALRM) {
@@ -1197,10 +1197,10 @@ ChipSet.prototype.getRTCByte = function(iRTC)
         if (!(this.abCMOSData[ChipSet.CMOS.ADDR.RTC_STATUSB] & ChipSet.CMOS.STATUSB.BINARY)) {
             /*
              * We're in BCD mode, so we must convert b from BINARY to BCD.  But first:
-             * 
+             *
              *      If b is a 12-hour value (ie, we're in 12-hour mode) AND the hour is a PM value
              *      (ie, in the range 0x81-0x8C), then it must be adjusted to yield 81-92 in BCD.
-             * 
+             *
              *      AM hour values (0x01-0x0C) need no adjustment; they naturally convert to 01-12 in BCD.
              */
             if (f12HourValue && b > 0x80) {
@@ -1216,7 +1216,7 @@ ChipSet.prototype.getRTCByte = function(iRTC)
              */
             this.abCMOSData[iRTC] ^= ChipSet.CMOS.STATUSA.UIP;
         }
-    }    
+    }
     return b;
 };
 
@@ -1237,7 +1237,7 @@ ChipSet.prototype.setRTCByte = function(iRTC, b)
             /*
              * We're in BCD mode, so we must convert b from BCD to BINARY (we assume it's valid
              * BCD; ie, that both nibbles contain only 0-9, not A-F).
-             */ 
+             */
             b = (b >> 4) * 10 + (b & 0xf);
             fBCD = true;
         }
@@ -1245,7 +1245,7 @@ ChipSet.prototype.setRTCByte = function(iRTC, b)
             if (fBCD) {
                 /*
                  * If the original BCD hour was 0x81-0x92, then the previous BINARY-to-BCD conversion
-                 * transformed it to 0x51-0x5C, so we must add 0x30. 
+                 * transformed it to 0x51-0x5C, so we must add 0x30.
                  */
                 if (b > 12) {
                     Component.assert(b >= 0x51 && b <= 0x5c);
@@ -1275,10 +1275,10 @@ ChipSet.prototype.updateRTCDate = function()
     var nCyclesDelta = 0;
     var nCyclesPerSecond = this.cpu.getCyclesPerSecond();
     var nCyclesUpdate = this.cpu.getCycles(this.fScaleTimers);
-    
+
     /*
      * If nCyclesCMOSLastUpdate hasn't been set yet (ie, if this is our first updateRTCDate() call),
-     * then do nothing except initialize nCyclesCMOSLastUpdate. 
+     * then do nothing except initialize nCyclesCMOSLastUpdate.
      */
     if (this.nCyclesCMOSLastUpdate >= 0) {
         nCyclesDelta = nCyclesUpdate - this.nCyclesCMOSLastUpdate;
@@ -1400,7 +1400,7 @@ ChipSet.prototype.addCMOSMemory = function(addr, size)
  * setCMOSDriveType(iDrive, bType)
  *
  * For use by the HDC component, to update the CMOS drive configuration to match HDC's internal configuration.
- * 
+ *
  * TODO: Extend this to support FDC drive updates, so that FDC can eventually specify diskette drive types
  * (ie, DSDD or DSHD) in the same way that HDC does; currently, MODEL_5170 diskette drives always default to DSHD
  * (see getSWFloppyDriveType()).
@@ -1428,13 +1428,13 @@ ChipSet.prototype.setCMOSDriveType = function(iDrive, bType)
 
 /**
  * updateCMOSChecksum()
- * 
+ *
  * This sums all the CMOS bytes from 0x10-0x2D, creating a 16-bit checksum.  That's a total of 30 (unsigned) 8-bit
  * values which could sum to at most 30*255 or 7650 (0x1DE2).  Since there's no way that can overflow 16 bits, we don't
  * worry about masking it with 0xffff.
- * 
+ *
  * WARNING: The IBM PC AT TechRef, p.1-53 (p.75) claims that the checksum is on bytes 0x10-0x20, but that's simply wrong.
- * 
+ *
  * @this {ChipSet}
  */
 ChipSet.prototype.updateCMOSChecksum = function()
@@ -1449,7 +1449,7 @@ ChipSet.prototype.updateCMOSChecksum = function()
 
 /**
  * save()
- * 
+ *
  * @this {ChipSet}
  * @return {Object}
  *
@@ -1473,7 +1473,7 @@ ChipSet.prototype.save = function()
 
 /**
  * restore(data)
- * 
+ *
  * @this {ChipSet}
  * @param {Object} data
  * @return {boolean} true if successful, false if failure
@@ -1494,27 +1494,27 @@ ChipSet.prototype.restore = function(data)
     for (i = 0; i < this.cDMACs; i++) {
         this.initDMAController(i, a.length == 1? a[0][i] : a);
     }
-    
+
     a = data[2];
     this.aPICs = new Array(this.cPICs);
     for (i = 0; i < this.cPICs; i++) {
         this.initPIC(i, i === 0? ChipSet.PIC0.PORT_LO : ChipSet.PIC1.PORT_LO, a[0][i]);
     }
-    
+
     a = data[3];
     this.bTimerCtrl = a[0];
     this.aTimers = new Array(3);
     for (i = 0; i < this.aTimers.length; i++) {
         this.initTimer(i, a[1][i]);
     }
-    
+
     a = data[4];
     this.bPPIA = a[0];
     this.bPPIB = a[1];
     this.bPPIC = a[2];
     this.bPPICtrl = a[3];
     this.bNMI  = a[4];
-    
+
     a = data[5];
     if (a) {
         Component.assert(this.model >= ChipSet.MODEL_5170);
@@ -1537,7 +1537,7 @@ ChipSet.prototype.restore = function(data)
         /*
          * TODO: Decide whether restore() should faithfully preserve the RTC date/time that save() saved,
          * or always reinitialize the date/time, or give the user (or the machine configuration) the option.
-         * 
+         *
          * For now, we're always reinitializing the RTC date.  Alternatively, we could selectively update
          * the CMOS bytes above, instead of overwriting them all, in which case this extra call to initRTCDate()
          * could be avoided.
@@ -1571,7 +1571,7 @@ ChipSet.prototype.initDMAController = function(iDMAC, aState)
 
 /**
  * initDMAChannel(controller, iChannel, aState)
- * 
+ *
  * @this {ChipSet}
  * @param {Object} controller
  * @param {number} iChannel
@@ -1598,7 +1598,7 @@ ChipSet.prototype.initDMAChannel = function(controller, iChannel, aState)
 
 /**
  * initDMAFunction(channel)
- * 
+ *
  * @param {Object} channel
  * @param {Component|string} component
  * @param {string} sFunction
@@ -1623,7 +1623,7 @@ ChipSet.prototype.initDMAFunction = function(channel, component, sFunction, obj)
 
 /**
  * saveDMAControllers()
- * 
+ *
  * @this {ChipSet}
  * @return {Array}
  */
@@ -1645,7 +1645,7 @@ ChipSet.prototype.saveDMAControllers = function()
 
 /**
  * saveDMAChannels(controller)
- * 
+ *
  * @this {ChipSet}
  * @param {Object} controller
  * @return {Array}
@@ -1672,7 +1672,7 @@ ChipSet.prototype.saveDMAChannels = function(controller)
 
 /**
  * initPIC(iPIC, aState)
- * 
+ *
  * @this {ChipSet}
  * @param {number} iPIC
  * @param {number} port
@@ -1696,7 +1696,7 @@ ChipSet.prototype.initPIC = function(iPIC, port, aState)
 
 /**
  * savePICs()
- * 
+ *
  * @this {ChipSet}
  * @return {Array}
  */
@@ -1721,7 +1721,7 @@ ChipSet.prototype.savePICs = function()
 
 /**
  * initTimer(iTimer, aState)
- * 
+ *
  * @this {ChipSet}
  * @param {number} iTimer
  * @param {Array} [aState]
@@ -1749,7 +1749,7 @@ ChipSet.prototype.initTimer = function(iTimer, aState)
 
 /**
  * saveTimers()
- * 
+ *
  * @this {ChipSet}
  * @return {Array}
  */
@@ -1779,7 +1779,7 @@ ChipSet.prototype.saveTimers = function()
 
 /**
  * getSWMemorySize(fInit)
- * 
+ *
  * @this {ChipSet}
  * @param {boolean|undefined} [fInit] is true for init switch value(s) only, current value(s) otherwise
  * @return {number} number of Kb of specified memory (NOT necessarily the same as installed memory; see RAM component)
@@ -1793,7 +1793,7 @@ ChipSet.prototype.getSWMemorySize = function(fInit)
 
 /**
  * getSWFloppyDrives(fInit)
- * 
+ *
  * @this {ChipSet}
  * @param {boolean|undefined} [fInit] is true for init switch value(s) only, current value(s) otherwise
  * @return {number} number of floppy drives specified by SW1 (range is 0 to 4)
@@ -1809,7 +1809,7 @@ ChipSet.prototype.getSWFloppyDrives = function(fInit)
  *
  * @this {ChipSet}
  * @param {number} iDrive (0-based)
- * @return {number} one of the ChipSet.CMOS.FDRIVE values (ie, NONE: 0, DSDD: 1, DSHD: 2) 
+ * @return {number} one of the ChipSet.CMOS.FDRIVE values (ie, NONE: 0, DSDD: 1, DSHD: 2)
  */
 ChipSet.prototype.getSWFloppyDriveType = function(iDrive)
 {
@@ -1824,7 +1824,7 @@ ChipSet.prototype.getSWFloppyDriveType = function(iDrive)
 
 /**
  * getSWVideoMonitor(fInit)
- * 
+ *
  * @this {ChipSet}
  * @param {boolean|undefined} [fInit] is true for init switch value(s) only, current value(s) otherwise
  * @return {number} one of ChipSet.MONITOR.*
@@ -1837,7 +1837,7 @@ ChipSet.prototype.getSWVideoMonitor = function(fInit)
 
 /**
  * addSwitches(s, control, n, v, oTips)
- * 
+ *
  * @this {ChipSet}
  * @param {string} s is the name of the control
  * @param {Object} control is the HTML control DOM object
@@ -1880,7 +1880,7 @@ ChipSet.prototype.addSwitches = function(s, control, n, v, oTips)
 
 /**
  * getSwitch(control)
- * 
+ *
  * @this {ChipSet}
  * @param {Object} control is an HTML control DOM object
  * @return {boolean} true if the switch represented by e is "on", false if "off"
@@ -1892,7 +1892,7 @@ ChipSet.prototype.getSwitch = function(control)
 
 /**
  * setSwitch(control, f)
- * 
+ *
  * @this {ChipSet}
  * @param {Object} control is an HTML control DOM object
  * @param {boolean} f is true if the switch represented by e should be "on", false if "off"
@@ -1906,7 +1906,7 @@ ChipSet.prototype.setSwitch = function(control, f)
 
 /**
  * toggleSwitch(control)
- * 
+ *
  * @this {ChipSet}
  * @param {Object} control is an HTML control DOM object
  */
@@ -1932,7 +1932,7 @@ ChipSet.prototype.toggleSwitch = function(control)
 
 /**
  * updateSwitchDesc()
- * 
+ *
  * @this {ChipSet}
  */
 ChipSet.prototype.updateSwitchDesc = function()
@@ -1963,7 +1963,7 @@ ChipSet.prototype.updateSwitchDesc = function()
 
 /**
  * dumpPIC()
- * 
+ *
  * @this {ChipSet}
  */
 ChipSet.prototype.dumpPIC = function()
@@ -1984,7 +1984,7 @@ ChipSet.prototype.dumpPIC = function()
 
 /**
  * dumpTimer()
- * 
+ *
  * @this {ChipSet}
  */
 ChipSet.prototype.dumpTimer = function()
@@ -2026,7 +2026,7 @@ ChipSet.prototype.dumpCMOS = function()
 
 /**
  * inDMAChannelAddr(iDMAC, iChannel, port, addrFrom)
- * 
+ *
  * @this {ChipSet}
  * @param {number} iDMAC
  * @param {number} iChannel
@@ -2046,7 +2046,7 @@ ChipSet.prototype.inDMAChannelAddr = function(iDMAC, iChannel, port, addrFrom)
 
 /**
  * outDMAChannelAddr(iDMAC, iChannel, port, bOut, addrFrom)
- * 
+ *
  * @this {ChipSet}
  * @param {number} iDMAC
  * @param {number} iChannel
@@ -2065,7 +2065,7 @@ ChipSet.prototype.outDMAChannelAddr = function outDMAChannelAddr(iDMAC, iChannel
 
 /**
  * inDMAChannelCount(iDMAC, iChannel, port, addrFrom)
- * 
+ *
  * @this {ChipSet}
  * @param {number} iDMAC
  * @param {number} iChannel
@@ -2085,7 +2085,7 @@ ChipSet.prototype.inDMAChannelCount = function(iDMAC, iChannel, port, addrFrom)
 
 /**
  * outDMAChannelCount(iDMAC, iChannel, port, bOut, addrFrom)
- * 
+ *
  * @this {ChipSet}
  * @param {number} iDMAC
  * @param {number} iChannel (ports 0x01, 0x03, 0x05, 0x07)
@@ -2104,7 +2104,7 @@ ChipSet.prototype.outDMAChannelCount = function(iDMAC, iChannel, port, bOut, add
 
 /**
  * inDMAStatus(iDMAC, port, addrFrom)
- * 
+ *
  * @this {ChipSet}
  * @param {number} iDMAC
  * @param {number} port
@@ -2132,7 +2132,7 @@ ChipSet.prototype.inDMAStatus = function(iDMAC, port, addrFrom)
      * HACK: Unlike the MODEL_5150, the MODEL_5160 ROM BIOS checks DMA channel 0 for TC (@F000:E4DF)
      * after running a number of unrelated tests, since enough time would have passed for channel 0 to
      * have reached TC at least once.  So I simply OR in a hard-coded TC bit for channel 0 every time
-     * status is read.  
+     * status is read.
      */
     var controller = this.aDMACs[iDMAC];
     var b = controller.bStatus | 0x1;
@@ -2143,7 +2143,7 @@ ChipSet.prototype.inDMAStatus = function(iDMAC, port, addrFrom)
 
 /**
  * outDMACmd(iDMAC, port, bOut, addrFrom)
- * 
+ *
  * @this {ChipSet}
  * @param {number} iDMAC
  * @param {number} port
@@ -2158,7 +2158,7 @@ ChipSet.prototype.outDMACmd = function(iDMAC, port, bOut, addrFrom)
 
 /**
  * outDMAReq(iDMAC, port, bOut, addrFrom)
- * 
+ *
  * @this {ChipSet}
  * @param {number} iDMAC
  * @param {number} port
@@ -2184,7 +2184,7 @@ ChipSet.prototype.outDMAReq = function(iDMAC, port, bOut, addrFrom)
      */
     var iChannel = (bOut & 0x3);
     /*
-     * Bit 2 is the request bit (0 to reset, 1 to set), which must be propagated to the corresponding bit (4-7) in the status register 
+     * Bit 2 is the request bit (0 to reset, 1 to set), which must be propagated to the corresponding bit (4-7) in the status register
      */
     var iChannelBit = ((bOut & 0x4) << (iChannel + 2));
     controller.bStatus = (controller.bStatus & ~(0x10 << iChannel)) | iChannelBit;
@@ -2193,7 +2193,7 @@ ChipSet.prototype.outDMAReq = function(iDMAC, port, bOut, addrFrom)
 
 /**
  * outDMAMask(iDMAC, port, bOut, addrFrom)
- * 
+ *
  * @this {ChipSet}
  * @param {number} iDMAC
  * @param {number} port
@@ -2212,7 +2212,7 @@ ChipSet.prototype.outDMAMask = function(iDMAC, port, bOut, addrFrom)
 
 /**
  * outDMAMode(iDMAC, port, bOut, addrFrom)
- * 
+ *
  * @this {ChipSet}
  * @param {number} iDMAC
  * @param {number} port
@@ -2228,7 +2228,7 @@ ChipSet.prototype.outDMAMode = function(iDMAC, port, bOut, addrFrom)
 
 /**
  * outDMAIndex(iDMAC, port, bOut, addrFrom)
- * 
+ *
  * @this {ChipSet}
  * @param {number} iDMAC
  * @param {number} port
@@ -2246,7 +2246,7 @@ ChipSet.prototype.outDMAIndex = function(iDMAC, port, bOut, addrFrom)
 
 /**
  * outDMAClear(iDMAC, port, bOut, addrFrom)
- * 
+ *
  * @this {ChipSet}
  * @param {number} iDMAC
  * @param {number} port
@@ -2284,7 +2284,7 @@ ChipSet.prototype.inDMAPageReg = function(iDMAC, iChannel, port, addrFrom)
 
 /**
  * outDMAPageReg(iDMAC, iChannel, port, bOut, addrFrom)
- * 
+ *
  * @this {ChipSet}
  * @param {number} iDMAC
  * @param {number} iChannel
@@ -2333,8 +2333,8 @@ ChipSet.prototype.outDMAPageSpare = function(iSpare, port, bOut, addrFrom)
  * checkDMA()
  *
  * Called by the CPU whenever INTR.DMA is set.
- * 
- * @return {boolean} true if one or more async DMA channels are still active (unmasked), false to reset INTR.DMA 
+ *
+ * @return {boolean} true if one or more async DMA channels are still active (unmasked), false to reset INTR.DMA
  */
 ChipSet.prototype.checkDMA = function()
 {
@@ -2388,7 +2388,7 @@ ChipSet.prototype.requestDMA = function(iDMAChannel, done)
 {
     var iDMAC = iDMAChannel >> 2;
     var controller = this.aDMACs[iDMAC];
-    
+
     var iChannel = iDMAChannel & 0x3;
     var channel = controller.aChannels[iChannel];
 
@@ -2402,7 +2402,7 @@ ChipSet.prototype.requestDMA = function(iDMAChannel, done)
      * We can't simply slam done into channel.done; that would be fine if requestDMA() was called only by functions
      * like HDC.doRead() and HDC.doWrite(), but we're also called whenever a DMA channel is unmasked, and in those cases,
      * we need to preserve whatever handler may have been previously set.
-     * 
+     *
      * However, in an effort to ensure we don't end up with stale done handlers, connectDMA() will reset channel.done.
      */
     if (done) channel.done = done;
@@ -2422,7 +2422,7 @@ ChipSet.prototype.requestDMA = function(iDMAChannel, done)
 
 /**
  * advanceDMA(channel, fInit)
- * 
+ *
  * @param {Object} channel
  * @param {boolean} [fInit]
  */
@@ -2442,7 +2442,7 @@ ChipSet.prototype.advanceDMA = function(channel, fInit)
      * the data transfer functions provide an fAsync parameter to their callbacks; fAsync must be true if the callback was
      * truly asynchronous (ie, it had to wait for a remote I/O request to finish), or false if the data was already available
      * and the callback was performed synchronously.
-     * 
+     *
      * Whenever a callback is issued asynchronously, we will immediately daisy-chain another pair of updateDMA()/advanceDMA()
      * calls, which will either finish the DMA operation if no more remote I/O requests are required, or will queue up another
      * I/O request, which will in turn trigger another async callback.  Thus, the DMA request keeps itself going without
@@ -2482,7 +2482,7 @@ ChipSet.prototype.advanceDMA = function(channel, fInit)
                             /*
                              * While it makes sense to call bus.setByteDirect(), since DMA deals with physical memory,
                              * we lose the ability to trap accesses with write breakpoints by not using obj.cpu.setByte().
-                             * 
+                             *
                              * TODO: Consider providing a Bus memory interface that honors write breakpoints.
                              */
                             obj.bus.setByteDirect(addrCur, b);
@@ -2502,7 +2502,7 @@ ChipSet.prototype.advanceDMA = function(channel, fInit)
                 /*
                  * While it makes sense to call bus.getByteDirect(), since DMA deals with physical memory,
                  * we lose the ability to trap accesses with read breakpoints by not using obj.cpu.getByte().
-                 * 
+                 *
                  * TODO: Determine whether we should support async dmaWrite() functions (currently not required),
                  * and consider providing a Bus memory interface that honors read breakpoints.
                  */
@@ -2511,7 +2511,7 @@ ChipSet.prototype.advanceDMA = function(channel, fInit)
                     /*
                      * In this case, I think I have no choice but to terminate the DMA operation in response to a failure,
                      * because the ROM BIOS FDC.REG_DATA.CMD.FORMAT_TRACK command specifies a count that is MUCH too large (a side-effect
-                     * of the ROM BIOS using the same "DMA_SETUP" code for reads, writes AND formats). 
+                     * of the ROM BIOS using the same "DMA_SETUP" code for reads, writes AND formats).
                      */
                     channel.fError = true;
                 }
@@ -2551,7 +2551,7 @@ ChipSet.prototype.updateDMA = function(channel)
         }
         /*
          * In situations where an HDC DMA operation took too long, the Fixed Disk BIOS would give up, but the DMA operation would continue.
-         * 
+         *
          * TODO: Verify that the Fixed Disk BIOS shuts down (ie, re-masks) a DMA channel for failed requests, and that this handles those failures.
          */
         if (!channel.masked) return false;
@@ -2562,7 +2562,7 @@ ChipSet.prototype.updateDMA = function(channel)
     controller.bStatus = (controller.bStatus & ~(0x10 << channel.iChannel)) | (0x1 << channel.iChannel);
 
     /*
-     * EOP is supposed to automatically (re)mask the channel, unless it's set for auto-initialize. 
+     * EOP is supposed to automatically (re)mask the channel, unless it's set for auto-initialize.
      */
     if (!(channel.mode & ChipSet.DMA_MODE.AUTOINIT)) {
         channel.masked = true;
@@ -2578,7 +2578,7 @@ ChipSet.prototype.updateDMA = function(channel)
         channel.done(!channel.fError);
         channel.done = null;
     }
-    
+
     /*
      * While it might make sense to call cpu.setDMA() here, it's simpler to let the CPU issue one more call
      * to chipset.checkDMA() and let the CPU update INTR.DMA on its own, based on the return value from checkDMA().
@@ -2588,7 +2588,7 @@ ChipSet.prototype.updateDMA = function(channel)
 
 /**
  * inPICLo(iPIC, addrFrom)
- * 
+ *
  * @this {ChipSet}
  * @param {number} iPIC
  * @param {number} [addrFrom] (not defined if the Debugger is trying to read the specified port)
@@ -2617,7 +2617,7 @@ ChipSet.prototype.inPICLo = function(iPIC, addrFrom)
 
 /**
  * outPICLo(iPIC, bOut, addrFrom)
- * 
+ *
  * @this {ChipSet}
  * @param {number} iPIC
  * @param {number} bOut
@@ -2636,10 +2636,10 @@ ChipSet.prototype.outPICLo = function(iPIC, bOut, addrFrom)
         /*
          * I used to do the rest of this initialization in outPICHi(), once all the ICW commands had been received,
          * but a closer reading of the 8259A spec indicates that that should happen now, on receipt on ICW1.
-         * 
+         *
          * Also, on p.10 of that spec, it says "The Interrupt Mask Register is cleared".  I originally took that to
          * mean that all interrupts were masked, but based on what MS-DOS 4.0M expects to happen after this code runs:
-         * 
+         *
          *      0070:44C6 B013          MOV      AL,13
          *      0070:44C8 E620          OUT      20,AL
          *      0070:44CA B050          MOV      AL,50
@@ -2658,12 +2658,12 @@ ChipSet.prototype.outPICLo = function(iPIC, bOut, addrFrom)
          * sequence, because they need to be (re)initialized at some point.  However, if some component is currently
          * requesting an interrupt, what should I do about that?  Originally, I had decided to clear them ONLY if they
          * were still undefined, but that change appeared to break the ROM BIOS handling of CTRL-ALT-DEL, so I'm back
-         * to unconditionally zeroing them. 
+         * to unconditionally zeroing them.
          */
         pic.bIRR = pic.bISR = 0;
         /*
          * The spec also says that "Special Mask Mode is cleared and Status Read is set to IRR".  I attempt to insure
-         * the latter, but as for special mask mode... well, that mode isn't supported yet. 
+         * the latter, but as for special mask mode... well, that mode isn't supported yet.
          */
         pic.bOCW3 = ChipSet.PIC_LO.OCW3 | ChipSet.PIC_LO.OCW3_READ_IRR;
     }
@@ -2688,7 +2688,7 @@ ChipSet.prototype.outPICLo = function(iPIC, bOut, addrFrom)
                  * Less "specifically", a non-specific EOI command.  The search for the highest priority in-service
                  * interrupt must start with whichever interrupt is opposite the lowest priority interrupt (normally 7,
                  * but technically whatever bIRLow is currently set to).  For example:
-                 * 
+                 *
                  *      If bIRLow is 7, then the priority order is: 0, 1, 2, 3, 4, 5, 6, 7.
                  *      If bIRLow is 6, then the priority order is: 7, 0, 1, 2, 3, 4, 5, 6.
                  *      If bIRLow is 5, then the priority order is: 6, 7, 0, 1, 2, 3, 4, 5.
@@ -2732,7 +2732,7 @@ ChipSet.prototype.outPICLo = function(iPIC, bOut, addrFrom)
         }
     } else {
         /*
-         * This must be an OCW3 request. If it's a "Read Register" command (PIC_LO.OCW3_READ_CMD), inPICLo() will take care it. 
+         * This must be an OCW3 request. If it's a "Read Register" command (PIC_LO.OCW3_READ_CMD), inPICLo() will take care it.
          *
          * TODO: If OCW3 specified a "Poll" command (PIC_LO.OCW3_POLL_CMD) or a "Special Mask Mode" command (PIC_LO.OCW3_SMM_CMD),
          * that's unfortunate, because I don't support them yet.
@@ -2746,7 +2746,7 @@ ChipSet.prototype.outPICLo = function(iPIC, bOut, addrFrom)
 
 /**
  * inPICHi(iPIC, addrFrom)
- * 
+ *
  * @this {ChipSet}
  * @param {number} iPIC
  * @param {number} [addrFrom] (not defined if the Debugger is trying to read the specified port)
@@ -2762,7 +2762,7 @@ ChipSet.prototype.inPICHi = function(iPIC, addrFrom)
 
 /**
  * outPICHi(iPIC, bOut, addrFrom)
- * 
+ *
  * @this {ChipSet}
  * @param {number} iPIC
  * @param {number} bOut
@@ -2800,7 +2800,7 @@ ChipSet.prototype.outPICHi = function(iPIC, bOut, addrFrom)
 
 /**
  * checkIRR(iPIC, nDelay)
- * 
+ *
  * @this {ChipSet}
  * @param {number} iPIC
  * @param {number} [nDelay] is an optional number of instructions to delay acknowledgment of the IRQ (see getIRRVector)
@@ -2818,7 +2818,7 @@ ChipSet.prototype.checkIRR = function(iPIC, nDelay)
 
 /**
  * setIRR(nIRQ, nDelay)
- * 
+ *
  * @this {ChipSet}
  * @param {number} nIRQ (IRQ 0-7 implies iPIC 0, and IRQ 8-15 implies iPIC 1)
  * @param {number} [nDelay] is an optional number of instructions to delay acknowledgment of the IRQ (see getIRRVector)
@@ -2832,7 +2832,7 @@ ChipSet.prototype.setIRR = function(nIRQ, nDelay)
     if (DEBUG) this.messageDebugger("setIRR(" + nIRQ + ")", ChipSet.MESSAGE_PIC, nIRQ);
     pic.nDelay = nDelay || 0;
     /*
-     * When any slave IRR goes high, I'm assuming that the master's slave IRR line should go high as well 
+     * When any slave IRR goes high, I'm assuming that the master's slave IRR line should go high as well
      */
     if (iPIC == 1) this.aPICs[0].bIRR |= 0x4;
     this.checkIRR(iPIC);
@@ -2840,7 +2840,7 @@ ChipSet.prototype.setIRR = function(nIRQ, nDelay)
 
 /**
  * clearIRR(nIRQ)
- * 
+ *
  * @this {ChipSet}
  * @param {number} nIRQ (IRQ 0-7 implies iPIC 0, which is all we currently support anyway)
  */
@@ -2854,7 +2854,7 @@ ChipSet.prototype.clearIRR = function(nIRQ)
         pic.bIRR &= ~bIRR;
         if (DEBUG) this.messageDebugger("clearIRR(" + nIRQ + ")", ChipSet.MESSAGE_PIC, nIRQ);
         /*
-         * When all slave IRRs go low, I'm assuming that the master's slave IRR line should go low as well 
+         * When all slave IRRs go low, I'm assuming that the master's slave IRR line should go low as well
          */
         if (iPIC == 1 && !pic.bIRR) this.aPICs[0].bIRR &= ~0x4;
         /*
@@ -2869,7 +2869,7 @@ ChipSet.prototype.clearIRR = function(nIRQ)
 
 /**
  * checkIMR(nIRQ)
- * 
+ *
  * @this {ChipSet}
  * @param {number} nIRQ
  * @return {boolean} true if the specified IRQ is masked, false if not
@@ -2884,7 +2884,7 @@ ChipSet.prototype.checkIMR = function(nIRQ)
 
 /**
  * getIRRVector()
- * 
+ *
  * getIRRVector() is called by the CPU whenever PS_IF is set and OP_NOINTR is clear.  Ordinarily, an immediate
  * response would seem perfectly reasonable, but unfortunately, there are places in the original ROM BIOS like
  * "KBD_RESET" (F000:E688) that enable interrupts but still expect nothing to happen for several more instructions.
@@ -2893,7 +2893,7 @@ ChipSet.prototype.checkIMR = function(nIRQ)
  * support a third response (-2) that basically means: don't change the CPU interrupt state, just keep calling until
  * we return one of the first two responses.  The number of times we delay our normal response is determined by the
  * component that originally called setIRR with an optional delay parameter.
- * 
+ *
  * @this {ChipSet}
  * @param {number} [iPIC]
  * @return {number} IDT vector # of the next highest-priority interrupt, -1 if none, or -2 for "please try your call again later"
@@ -2910,7 +2910,7 @@ ChipSet.prototype.getIRRVector = function(iPIC)
     if (!pic.nDelay) {
         var bIR = pic.bIRR & ((pic.bISR | pic.bIMR) ^ 0xff);
         /*
-         * The search for the next highest priority requested interrupt (that's also not in-service and not masked) 
+         * The search for the next highest priority requested interrupt (that's also not in-service and not masked)
          * must start with whichever interrupt is opposite the lowest priority interrupt (normally 7, but technically
          * whatever bIRLow is currently set to).  For example:
          *
@@ -2929,7 +2929,7 @@ ChipSet.prototype.getIRRVector = function(iPIC)
 
             var bIRNext = 1 << nIRL;
             if (bIR & bIRNext) {
-                
+
                 if (!iPIC && nIRL == 2) {
                     /*
                      * Slave interrupts are tied to the master PIC on IRQ2; query the slave PIC for the vector #
@@ -2941,12 +2941,12 @@ ChipSet.prototype.getIRRVector = function(iPIC)
                      */
                     nIDT = pic.aICW[1] + nIRL;
                 }
-                
+
                 if (nIDT >= 0) {
                     pic.bISR |= bIRNext;
                     pic.bIRR &= ~bIRNext;
                 }
-                
+
                 var nIRQ = pic.nIRQBase + nIRL;
                 if (DEBUG) this.messageDebugger("getIRRVector(): IRQ " + nIRQ + " going into service", ChipSet.MESSAGE_PIC, nIRQ);
                 if (MAXDEBUG && DEBUGGER) {
@@ -2954,7 +2954,7 @@ ChipSet.prototype.getIRRVector = function(iPIC)
                 }
                 break;
             }
-            
+
             if (nIRL++ == pic.bIRLow) break;
         }
     } else {
@@ -2966,7 +2966,7 @@ ChipSet.prototype.getIRRVector = function(iPIC)
 
 /**
  * inTimer(iTimer, addrFrom)
- * 
+ *
  * @this {ChipSet}
  * @param {number} iTimer (ports 0x40, 0x41, 0x42)
  * @param {number} [addrFrom] (not defined if the Debugger is trying to read the specified port)
@@ -2988,7 +2988,7 @@ ChipSet.prototype.inTimer = function(iTimer, addrFrom)
 
 /**
  * outTimer(iTimer, bOut, addrFrom)
- * 
+ *
  * @this {ChipSet}
  * @param {number} iTimer (ports 0x40, 0x41, 0x42)
  * @param {number} bOut
@@ -2997,7 +2997,7 @@ ChipSet.prototype.inTimer = function(iTimer, addrFrom)
 ChipSet.prototype.outTimer = function(iTimer, bOut, addrFrom)
 {
     this.messagePort(ChipSet.TIMER0.PORT + iTimer, bOut, addrFrom, "TIMER" + iTimer, ChipSet.MESSAGE_TIMER);
-    
+
     var timer = this.aTimers[iTimer];
     if (timer.countIndex == timer.countBytes) this.resetTimerIndex(iTimer);
     timer.countInit[timer.countIndex++] = bOut;
@@ -3024,11 +3024,11 @@ ChipSet.prototype.outTimer = function(iTimer, bOut, addrFrom)
              */
             if (iTimer == ChipSet.TIMER0.INDEX) this.clearIRR(ChipSet.IRQ.TIMER0);
         }
-        
+
         if (iTimer == ChipSet.TIMER2.INDEX) {
             this.setSpeaker();
         }
-        
+
         /*
          * HACK to detect lower-than-normal initial timer counts and reduce the length of CPU bursts, using
          * cpu.setBurstDivisor().  Alternatively, the CPU could ask us for a cycle limit, via getTimerCycleLimit(),
@@ -3044,7 +3044,7 @@ ChipSet.prototype.outTimer = function(iTimer, bOut, addrFrom)
                 this.cpu.setBurstDivisor(Math.round(0x10000 / countInit));
             }
         }
-        
+
         if (iTimer == ChipSet.TIMER0.INDEX && timer.mode == ChipSet.TIMER_CTRL.MODE0 && timer.rw == ChipSet.TIMER_CTRL.RW_LSB) {
             /*
              * HACK to satisfy the quick h/w interrupt turn-around expected by the ROM BIOS when it sets TIMER0 to a
@@ -3053,11 +3053,11 @@ ChipSet.prototype.outTimer = function(iTimer, bOut, addrFrom)
              * same time a timer interrupt is expected.  Note that in some cases, if the number of cycles remaining
              * in the current burst is less than the target, this will have the effect of *lengthening* the current
              * burst instead of shortening it, but stepCPU() should be OK with that.
-             * 
+             *
              * Notice how this complements the setBurstDivisor() HACK above: while that code is concerned with how
              * to deal with low timer counts prior to starting new bursts, here we're concerned with low timer counts
              * (in particular, single-byte LSB counts) programmed in the middle of a burst.
-             * 
+             *
              * The MODEL_5170 BIOS performs a virtually identical test ("TEST.18"), although unsurprisingly, it uses an
              * initial timer count that is explicitly twice that other of earlier models (0x16 * 2 = 0x2C).  Fortunately,
              * it still uses an LSB-only count; however, the original hack calculated the burst-cycle threshold using a
@@ -3071,7 +3071,7 @@ ChipSet.prototype.outTimer = function(iTimer, bOut, addrFrom)
 
 /**
  * inTimerCtrl(port, addrFrom)
- * 
+ *
  * @this {ChipSet}
  * @param {number} port (0x43)
  * @param {number} [addrFrom] (not defined if the Debugger is trying to read the specified port)
@@ -3086,7 +3086,7 @@ ChipSet.prototype.inTimerCtrl = function(port, addrFrom)
 
 /**
  * outTimerCtrl(port, bOut, addrFrom)
- * 
+ *
  * @this {ChipSet}
  * @param {number} port (0x43)
  * @param {number} bOut
@@ -3114,26 +3114,26 @@ ChipSet.prototype.outTimerCtrl = function(port, bOut, addrFrom)
         this.latchTimer(iTimer);
     } else {
         this.setTimerMode(iTimer, bcd, mode, rw);
-        
+
         /*
          * The 5150 ROM BIOS code @F000:E285 ("TEST.7") would fail after a warm boot (eg, after a CTRL-ALT-DEL) because
          * it assumed that no TIMER0 interrupt would occur between the point it unmasked the TIMER0 interrupt and the
          * point it started reprogramming TIMER0.
-         * 
+         *
          * Similarly, the 5160 ROM BIOS @F000:E35D ("8253 TIMER CHECKOUT") would fail after initializing the EGA BIOS,
          * because the EGA BIOS uses TIMER0 during its diagnostics; as in the previous example, by the time the 8253
          * test code runs later, there's now a pending TIMER0 interrupt, which triggers an interrupt as soon as IRQ0 is
          * unmasked @F000:E364.
-         * 
+         *
          * After looking at this problem at bit more closely the second time around (while debugging the EGA BIOS),
          * it turns out I missed an important 8253 feature: whenever a new MODE0 control word OR a new MODE0 count
          * is written, fOUT (which is what drives IRQ0) goes low.  So, by simply adding an appropriate clearIRR() call
          * both here and in outTimer(), this annoying problem seems to be gone.
-         * 
+         *
          * TODO: Determine if there are situations/modes where I should NOT automatically clear IRQ0 on behalf of TIMER0.
          */
         if (iTimer == ChipSet.TIMER0.INDEX) this.clearIRR(ChipSet.IRQ.TIMER0);
-        
+
         /*
          * Another TIMER0 HACK: The "CASSETTE DATA WRAP TEST" @F000:E51E occasionally reports an error when the second of
          * two TIMER0 counts it latches is greater than the first.  You would think the ROM BIOS would expect this, since
@@ -3141,7 +3141,7 @@ ChipSet.prototype.outTimerCtrl = function(port, bOut, addrFrom)
          * recently that this should never happen?  I'm not sure, but for now, let's try resetting TIMER0's count immediately
          * after TIMER2 has been reprogrammed for the test in question (ie, when interrupts are masked and PPIB is set as
          * shown below).
-         * 
+         *
          * FWIW, I believe the cassette hardware was discontinued after MODEL_5150, and even if the test fails, it's non-fatal;
          * the ROM BIOS displays an error (131) and moves on.
          */
@@ -3160,7 +3160,7 @@ ChipSet.prototype.outTimerCtrl = function(port, bOut, addrFrom)
 
 /**
  * getTimerInit(iTimer)
- * 
+ *
  * @this {ChipSet}
  * @param {number} iTimer
  * @return {number} initial timer count
@@ -3175,7 +3175,7 @@ ChipSet.prototype.getTimerInit = function(iTimer)
 
 /**
  * getTimerStart(iTimer)
- * 
+ *
  * @this {ChipSet}
  * @param {number} iTimer
  * @return {number} starting timer count (from the initial timer count for the current countdown)
@@ -3204,7 +3204,7 @@ ChipSet.prototype.getTimerCycleLimit = function(iTimer)
 
 /**
  * latchTimer(iTimer)
- * 
+ *
  * @this {ChipSet}
  * @param {number} iTimer
  */
@@ -3214,7 +3214,7 @@ ChipSet.prototype.latchTimer = function(iTimer)
      * Update the timer's current count
      */
     this.updateTimer(iTimer);
-    
+
     /*
      * Now we can latch it
      */
@@ -3222,7 +3222,7 @@ ChipSet.prototype.latchTimer = function(iTimer)
     timer.countLatched[0] = timer.countCurrent[0];
     timer.countLatched[1] = timer.countCurrent[1];
     timer.fLatched = true;
-    
+
     /*
      * VERIFY: That a latch request resets the timer index
      */
@@ -3234,7 +3234,7 @@ ChipSet.prototype.latchTimer = function(iTimer)
  *
  * FYI: After setting a timer's mode, the CPU must set the timer's count before it becomes operational;
  * ie, before fCounting becomes true.
- * 
+ *
  * @this {ChipSet}
  * @param {number} iTimer
  * @param {number} bcd
@@ -3258,7 +3258,7 @@ ChipSet.prototype.setTimerMode = function(iTimer, bcd, mode, rw)
 
 /**
  * resetTimerIndex(iTimer)
- * 
+ *
  * @this {ChipSet}
  * @param {number} iTimer
  */
@@ -3271,7 +3271,7 @@ ChipSet.prototype.resetTimerIndex = function(iTimer)
 
 /**
  * updateTimer(iTimer, fCycleReset)
- * 
+ *
  * updateTimer() calculates and updates a timer's current count purely on an "on-demand" basis; we don't actually
  * adjust timer counters every 4 CPU cycles, since updating timers that frequently would be prohibitively slow.  If
  * you're single-stepping the CPU, then yes, updateTimer() will be called after every stepCPU(), via updateAllTimers(),
@@ -3302,10 +3302,10 @@ ChipSet.prototype.updateTimer = function(iTimer, fCycleReset)
          * We determine the current timer count based on how many instruction cycles have elapsed since we started
          * the timer.  Timers are supposed to be "ticking" at a rate of 1193181.8181 times per second, which is
          * the system clock of 14.31818Mhz, divided by 12.
-         * 
+         *
          * Similarly, for an 8088, there are supposed to be 4.77Mhz instruction cycles per second, which comes from
          * the system clock of 14.31818Mhz, divided by 3.
-         * 
+         *
          * If we divide 4,772,727 CPU cycles per second by 1,193,181 ticks per second, we get 4 cycles per tick,
          * which agrees with the ratio of the clock divisors: 12 / 3 == 4.
          *
@@ -3314,11 +3314,11 @@ ChipSet.prototype.updateTimer = function(iTimer, fCycleReset)
          * so that the timers fire with the same real-world frequency that the user expects.  However, that will
          * break any code (eg, the ROM BIOS diagnostics) that assumes that the timers are ticking once every 4 cycles
          * (or more like every 5 cycles on a 6Mhz 80286).
-         * 
+         *
          * So, when using a machine with the ChipSet "scaletimers" property set, make sure you reset the machine's
          * speed prior to rebooting, otherwise you're likely to see ROM BIOS errors.  Ditto for any application code
          * that makes similar assumptions about the relationship between CPU and timer speeds.
-         * 
+         *
          * In general, you're probably better off NOT using the "scaletimers" property, and simply allowing the timers
          * to tick faster as you increase CPU speed (which is why fScaleTimers defaults to false).
          */
@@ -3329,7 +3329,7 @@ ChipSet.prototype.updateTimer = function(iTimer, fCycleReset)
          * time we're called, using the cycle count recorded when the timer was initialized.  countStart is set
          * to countInit when fCounting is first set, and then it is refreshed from countInit at the expiration of
          * every count, so that if someone loaded a new countInit in the meantime (eg, BASICA), we'll pick it up.
-         * 
+         *
          * For the original MODEL_5170, the number of cycles per tick is approximately 6,000,000 / 1,193,181,
          * or 5.028575, so we can no longer always divide cycles by 4 with a simple right-shift by 2.  The proper
          * divisor (eg, 4 for MODEL_5150 and MODEL_5160, 5 for MODEL_5170, etc) is nTicksDivisor, which initBus()
@@ -3345,10 +3345,10 @@ ChipSet.prototype.updateTimer = function(iTimer, fCycleReset)
 
         var countInit = this.getTimerInit(iTimer);
         var countStart = this.getTimerStart(iTimer);
-        
+
         var fFired = false;
         var count = countStart - ticks;
-        
+
         /*
          * NOTE: This mode is used by ROM BIOS test code that wants to verify timer interrupts are arriving
          * neither too slowly nor too quickly.  As a result, I've had to add some corresponding trickery
@@ -3372,20 +3372,20 @@ ChipSet.prototype.updateTimer = function(iTimer, fCycleReset)
          * to see the count changing; it wasn't looking for interrupts.  See ROM BIOS "TEST.03" code @F000:E0DE,
          * where TIMER1 is programmed for MODE2, LSB (the same settings, incidentally, used immediately afterward
          * for TIMER1 in conjunction with DMA channel 0 memory refreshes).
-         * 
+         *
          * Now this mode generates interrupts.  Note that "OUT" goes "low" when the count reaches 1, then "high"
          * one tick later, at which point the count is reloaded and counting continues.
-         * 
+         *
          * Chances are, we will often miss the exact point at which the count becomes 1 (or more importantly, one
          * tick later, when the count *would* become 0, since that's when "OUT" transitions from "low" to "high"),
          * but as with MODE3, hopefully no one will mind.
-         * 
+         *
          * FYI, technically, it appears that the count is never supposed to reach 0, and that an initial count of 1
          * is "illegal", whatever that means.
          */
         else
         if (timer.mode == ChipSet.TIMER_CTRL.MODE2) {
-            timer.fOUT = (count != 1);          // yes, this line does seem rather pointless.... 
+            timer.fOUT = (count != 1);          // yes, this line does seem rather pointless....
             if (count <= 0) {
                 count = countInit + count;
                 if (count <= 0) {
@@ -3452,7 +3452,7 @@ ChipSet.prototype.updateTimer = function(iTimer, fCycleReset)
 
 /**
  * updateAllTimers(fCycleReset)
- * 
+ *
  * @this {ChipSet}
  * @param {boolean|undefined} [fCycleReset] is true if a cycle-count reset is about to occur
  */
@@ -3466,7 +3466,7 @@ ChipSet.prototype.updateAllTimers = function(fCycleReset)
 
 /**
  * inPPIA(port, addrFrom)
- * 
+ *
  * @this {ChipSet}
  * @param {number} port (0x60)
  * @param {number} [addrFrom] (not defined if the Debugger is trying to read the specified port)
@@ -3489,7 +3489,7 @@ ChipSet.prototype.inPPIA = function(port, addrFrom)
 
 /**
  * outPPIA(port, bOut, addrFrom)
- * 
+ *
  * @this {ChipSet}
  * @param {number} port (0x60)
  * @param {number} bOut
@@ -3533,7 +3533,7 @@ ChipSet.prototype.outPPIB = function(port, bOut, addrFrom)
 
 /**
  * updatePPIB(bOut)
- * 
+ *
  * On MODEL_5170 and up, this updates the "simulated" PPI_B.  The only common (and well-documented) PPI_B bits
  * across all models are PPI_B.CLK_TIMER2 and PPI_B.SPK_TIMER2, so its possible that this function may need to
  * limit its updates to just those bits, and move any model-specific requirements back into the appropriate I/O
@@ -3551,7 +3551,7 @@ ChipSet.prototype.updatePPIB = function(bOut)
         /*
          * Originally, this code didn't catch the "ERROR_BEEP" case @F000:EC34, which first turns both PPI_B.CLK_TIMER2 (0x01)
          * and PPI_B.SPK_TIMER2 (0x02) off, then turns on only PPI_B.SPK_TIMER2 (0x02), then restores the original port value.
-         * 
+         *
          * So, when the ROM BIOS keyboard buffer got full, we didn't issue a BEEP alert.  I've fixed that by limiting the test
          * to PPI_B.SPK_TIMER2 and ignoring PPI_B.CLK_TIMER2.
          */
@@ -3561,7 +3561,7 @@ ChipSet.prototype.updatePPIB = function(bOut)
 
 /**
  * inPPIC(port, addrFrom)
- * 
+ *
  * @this {ChipSet}
  * @param {number} port (0x62)
  * @param {number} [addrFrom] (not defined if the Debugger is trying to read the specified port)
@@ -3609,7 +3609,7 @@ ChipSet.prototype.inPPIC = function(port, addrFrom)
 
 /**
  * outPPIC(port, bOut, addrFrom)
- * 
+ *
  * @this {ChipSet}
  * @param {number} port (0x62)
  * @param {number} bOut
@@ -3623,7 +3623,7 @@ ChipSet.prototype.outPPIC = function(port, bOut, addrFrom)
 
 /**
  * inPPICtrl(port, addrFrom)
- * 
+ *
  * @this {ChipSet}
  * @param {number} port (0x63)
  * @param {number} [addrFrom] (not defined if the Debugger is trying to read the specified port)
@@ -3638,7 +3638,7 @@ ChipSet.prototype.inPPICtrl = function(port, addrFrom)
 
 /**
  * outPPICtrl(port, bOut, addrFrom)
- * 
+ *
  * @this {ChipSet}
  * @param {number} port (0x63)
  * @param {number} bOut
@@ -3670,7 +3670,7 @@ ChipSet.prototype.in8042OutBuff = function(port, addrFrom)
 
 /**
  * out8042InBuffData(port, bOut, addrFrom)
- * 
+ *
  * This writes to the 8042's input buffer; using this port (ie, 0x60 instead of 0x64) designates the
  * the byte as a KBC.DATA.CMD "data byte".  Before clearing KBC.STATUS.CMD_FLAG, however, we see if it's set,
  * and then based on the previous KBC.CMD "command byte", we do whatever needs to be done with this "data byte".
@@ -3683,10 +3683,10 @@ ChipSet.prototype.in8042OutBuff = function(port, addrFrom)
 ChipSet.prototype.out8042InBuffData = function(port, bOut, addrFrom)
 {
     this.messagePort(port, bOut, addrFrom, "8042_INBUF.DATA", ChipSet.MESSAGE_8042);
-    
+
     if (this.b8042Status & ChipSet.KBC.STATUS.CMD_FLAG) {
         switch (this.b8042InBuff) {
-        
+
         case ChipSet.KBC.CMD.WRITE_CMD:
             this.set8042CmdData(bOut);
             break;
@@ -3694,17 +3694,17 @@ ChipSet.prototype.out8042InBuffData = function(port, bOut, addrFrom)
         case ChipSet.KBC.CMD.WRITE_OUTPORT:
             this.set8042OutPort(bOut);
             break;
-        
+
         /*
          * This case is reserved for command bytes that the 8042 is not expecting, which should therefore be passed on
          * to the Keyboard itself.
-         * 
+         *
          * Here's some relevant MODEL_5170 ROM BIOS code, "XMIT_8042" (missing from the original MODEL_5170 ROM BIOS listing),
          * which sends a command code in AL to the Keyboard and waits for a response, returning it in AL.  Note that
          * the only "success" exit path from this function involves LOOPing 64K times before finally reading the Keyboard's
          * response; either the hardware and/or this code seems a bit brain-damaged if that's REALLY what you had to do to ensure
          * a valid response....
-         * 
+         *
          *      F000:1B25 86E0          XCHG     AH,AL
          *      F000:1B27 2BC9          SUB      CX,CX
          *      F000:1B29 E464          IN       AL,64
@@ -3737,11 +3737,11 @@ ChipSet.prototype.out8042InBuffData = function(port, bOut, addrFrom)
          *      F000:1B60 E460          IN       AL,60
          *      F000:1B62 83E901        SUB      CX,0001    ; EXIT WITH SUCCESS (CX != 0)
          *      F000:1B65 C3            RET
-         *      
+         *
          * But WAIT, the FUN doesn't end there.  After this function returns, "KBD_RESET" waits for a Keyboard interrupt
          * to occur, hoping for scan code 0xAA as the Keyboard's final response.  "KBD_RESET" also returns CX to the caller,
          * and the caller ("TEST.21") assumes there was no interrupt if CX is zero.
-         * 
+         *
          *              MOV     AL,0FDH
          *              OUT     INTA01,AL
          *              MOV     INTR_FLAG,0
@@ -3754,7 +3754,7 @@ ChipSet.prototype.out8042InBuffData = function(port, bOut, addrFrom)
          *              DEC     BL
          *              JNZ     G11
          *              ...
-         *              
+         *
          * However, if [INTR_FLAG] is set immediately, the above code will exit immediately, without ever decrementing CX.
          * CX can be zero not only if the loop exhausted it, but also if no looping was required; the latter is not an
          * error, but "TEST.21" assumes that it is.
@@ -3786,21 +3786,21 @@ ChipSet.prototype.in8042RWReg = function(port, addrFrom)
      *
      * Also, "TEST.09" of the MODEL_5170 BIOS expects the REFRESH_BIT to alternate, so we used to
      * do this:
-     * 
+     *
      *      this.bPPIB ^= ChipSet.KBC.RWREG.REFRESH_BIT;
      *
      * However, the MODEL_5170_REV3 BIOS not only checks REFRESH_BIT in "TEST.09", but includes
      * an additional test right before "TEST.11A", which requires the bit change "a bit less"
      * frequently.  This new test sets CX to zero, and at the end of the test (@F000:05B8), CX
      * must be in the narrow range of 0xF600 through 0xF9FD.
-     * 
+     *
      * In fact, the new "WAITF" function @F000:1A3A tells us exactly how frequently REFRESH_BIT
      * is expected to change now.  That function performs a "FIXED TIME WAIT", where CX is a
      * "COUNT OF 15.085737us INTERVALS TO WAIT".
-     * 
+     *
      * So we now tie the state of the REFRESH_BIT to bit 6 of the current CPU cycle count,
      * effectively toggling the bit after every 64 cycles.  On an 8Mhz CPU that can do 8 cycles
-     * in 1us, 64 cycles represents 8us, so that might be a bit fast for "WAITF", but bit 6 
+     * in 1us, 64 cycles represents 8us, so that might be a bit fast for "WAITF", but bit 6
      * is the only choice that also satisfies the pre-"TEST.11A" test as well.
      */
     var b = this.bPPIB & ~(ChipSet.KBC.RWREG.PARITY_ERR | ChipSet.KBC.RWREG.REFRESH_BIT) | ((this.cpu.getCycles() & 0x40)? ChipSet.KBC.RWREG.REFRESH_BIT : 0);
@@ -3844,11 +3844,11 @@ ChipSet.prototype.in8042Status = function(port, addrFrom)
      * immediately), then checks KBC.STATUS.OUTBUFF_FULL and performs a "flush" on port 0x60 if
      * it's set, then waits for KBC.STATUS.OUTBUFF_FULL *again*.  Unfortunately, the "flush" throws
      * away our response if we respond immediately.
-     * 
+     *
      * So now when out8042InBuffCmd() has a response, it sets KBC.STATUS.OUTBUFF_DELAY instead
      * (which is outside the 0xff range of bits we return); when we see KBC.STATUS.OUTBUFF_DELAY,
      * we clear it and set KBC.STATUS.OUTBUFF_FULL, which will be returned on the next read.
-     * 
+     *
      * This provides a single poll delay, so that the aforementioned "flush" won't toss our response.
      * If longer delays are needed down the road, we may need to set a delay count in the upper (hidden)
      * bits of b8042Status, instead of using a single "OUTBUFF_DELAY" bit.
@@ -3877,18 +3877,18 @@ ChipSet.prototype.out8042InBuffCmd = function(port, bOut, addrFrom)
     this.messagePort(port, bOut, addrFrom, "8042_INBUFF.CMD", ChipSet.MESSAGE_8042);
     Component.assert(!(this.b8042Status & ChipSet.KBC.STATUS.INBUFF_FULL));
     this.b8042InBuff = bOut;
-    
+
     this.b8042Status |= ChipSet.KBC.STATUS.CMD_FLAG;
-    
+
     var bPulseBits = 0;
     if (this.b8042InBuff >= ChipSet.KBC.CMD.PULSE_OUTPORT) {
         bPulseBits = (this.b8042InBuff ^ 0xf);
         /*
-         * Now that we have isolated the bit(s) to pulse, map all pulse commands to KBC.CMD.PULSE_OUTPORT 
+         * Now that we have isolated the bit(s) to pulse, map all pulse commands to KBC.CMD.PULSE_OUTPORT
          */
         this.b8042InBuff = ChipSet.KBC.CMD.PULSE_OUTPORT;
     }
-    
+
     switch (this.b8042InBuff) {
     case ChipSet.KBC.CMD.WRITE_CMD:         // 0x60
     case ChipSet.KBC.CMD.WRITE_OUTPORT:     // 0xD1
@@ -3900,7 +3900,7 @@ ChipSet.prototype.out8042InBuffCmd = function(port, bOut, addrFrom)
     case ChipSet.KBC.CMD.READ_INPORT:       // 0xC0
         this.set8042OutBuff(this.b8042InPort);
         break;
-    
+
     case ChipSet.KBC.CMD.DISABLE_KBD:       // 0xAD
         this.set8042CmdData(this.b8042CmdData | ChipSet.KBC.DATA.CMD.NO_CLOCK);
         if (DEBUG) this.messageDebugger("keyboard disabled", ChipSet.MESSAGE_KBD);
@@ -3927,7 +3927,7 @@ ChipSet.prototype.out8042InBuffCmd = function(port, bOut, addrFrom)
     case ChipSet.KBC.CMD.READ_TEST:         // 0xE0
         this.set8042OutBuff((this.b8042CmdData & ChipSet.KBC.DATA.CMD.NO_CLOCK)? 0 : ChipSet.KBC.TESTPORT.KBD_CLOCK);
         break;
-        
+
     case ChipSet.KBC.CMD.PULSE_OUTPORT:     // 0xF0-0xFF
         if (bPulseBits & 0x1) {
             /*
@@ -3938,7 +3938,7 @@ ChipSet.prototype.out8042InBuffCmd = function(port, bOut, addrFrom)
             this.cpu.resetRegs();
         }
         break;
-    
+
     default:
         if (DEBUG && DEBUGGER && this.dbg) {
             this.dbg.message("unrecognized 8042 command: " + str.toHexByte(this.b8042InBuff));
@@ -3965,11 +3965,11 @@ ChipSet.prototype.set8042CmdData = function(b)
          * sends ChipSet.KBC.CMD.WRITE_CMD to port 0x64, followed by 0x4D to port 0x60, which clears NO_CLOCK
          * and enables the keyboard.  The BIOS then waits for OUTBUFF_FULL to be set, at which point it seems
          * to be anticipating an 0xAA response in the output buffer.
-         * 
+         *
          * And indeed, if we call the original MODEL_5150/MODEL_5160 setEnable() Keyboard interface here,
          * and both the data and clock lines have transitioned high (ie, both parameters are true), then it
          * will call resetDevice(), generating a Keyboard.CMDRES.BATSUCCESS response.
-         * 
+         *
          * This agrees with my understanding of what happens when the 8042 toggles the clock line high
          * (ie, clears NO_CLOCK): the TechRef's "Basic Assurance Test" section says that when the Keyboard is
          * powered on, it performs the BAT, and then when the clock and data lines go high, the keyboard sends
@@ -4110,9 +4110,9 @@ ChipSet.prototype.outMFGData = function(port, bOut, addrFrom)
 
 /**
  * outNMI(port, bOut, addrFrom)
- * 
+ *
  * This handler is installed only for models before MODEL_5170.
- * 
+ *
  * @this {ChipSet}
  * @param {number} port (0xA0)
  * @param {number} bOut
@@ -4131,7 +4131,7 @@ ChipSet.prototype.outNMI = function(port, bOut, addrFrom)
  *
  *      AH
  *      ----
- *      0x00    Get current clock count in CX:DX 
+ *      0x00    Get current clock count in CX:DX
  *      0x01    Set current clock count from CX:DX
  *      0x02    Get real-time clock using BCD (CH=hours, CL=minutes, DH=seconds)
  *      0x03    Set real-time clock using BCD (CH=hours, CL=minutes, DH=seconds, DL=1 if Daylight Savings Time option)
@@ -4162,7 +4162,7 @@ ChipSet.prototype.intBIOSRTC = function(addr)
                         sResult = " CH(hour)=" + str.toHexWord(CH) + " CL(min)=" + str.toHexByte(CL) + " DH(sec)=" + str.toHexByte(DH);
                     } else if (AH == 0x04 || AH == 0x05) {
                         sResult = " CX(year)=" + str.toHexWord(chipset.cpu.regCX) + " DH(month)=" + str.toHexByte(DH) + " DL(day)=" + str.toHexByte(DL);
-                    } 
+                    }
                     chipset.dbg.messageIntReturn(ChipSet.BIOS.INT_RTC, nLevel, nCycles, sResult);
                 };
             }(this, this.cpu.getCycles()));
@@ -4173,7 +4173,7 @@ ChipSet.prototype.intBIOSRTC = function(addr)
 
 /**
  * parseSwitches(s, def)
- * 
+ *
  * @this {ChipSet}
  * @param {string|undefined} s describing switch settings (can't simply use parseInt() with a base of 2, because the bit order is reversed, as well as the bit sense)
  * @param {number} def is a default value to use if s is undefined
@@ -4192,7 +4192,7 @@ ChipSet.prototype.parseSwitches = function(s, def)
 
 /**
  * setSpeaker(fOn)
- * 
+ *
  * @this {ChipSet}
  * @param {boolean} [fOn] true to turn speaker on, false to turn off, otherwise update as appropriate
  */
@@ -4238,7 +4238,7 @@ ChipSet.prototype.setSpeaker = function(fOn)
 
 /**
  * messageDebugger(sMessage, bitsMessage, nIRQ)
- * 
+ *
  * @this {ChipSet}
  * @param {string} sMessage is any caller-defined message string
  * @param {number} [bitsMessage] is one or more Debugger MESSAGE_* category flag(s)
@@ -4266,7 +4266,7 @@ ChipSet.prototype.messageDebugger = function(sMessage, bitsMessage, nIRQ)
 
 /**
  * messagePort(port, bOut, addrFrom, name, bitsMessage, bIn)
- * 
+ *
  * @this {ChipSet}
  * @param {number} port
  * @param {number|null} bOut if an output operation
diff --git a/my_modules/pcjs-client/lib/computer.js b/my_modules/pcjs-client/lib/computer.js
index 0c974a790..37e284a90 100644
--- a/my_modules/pcjs-client/lib/computer.js
+++ b/my_modules/pcjs-client/lib/computer.js
@@ -53,11 +53,11 @@
  * The PCjs JavaScript files do have some initialization-order dependencies.
  * If you load the files individually, it's recommended that you load them in
  * the same order that they're compiled.
- * 
+ *
  * Generally speaking, component.js should be first, computer.js should be
  * last (of the files based on component.js), and panel.js should be listed
  * early so that the Control Panel is ready as soon as possible.
- * 
+ *
  * Another recent ordering requirement is that rom.js must be loaded before
  * ram.js; this was true before, but now it's required, because I'm starting
  * to add ROM BIOS Data Area definitions to rom.js, and since the data area
@@ -67,19 +67,19 @@
 "use strict";
 
 if (typeof module !== 'undefined') {
-    var str = require("../../shared/lib/strlib");
-    var usr = require("../../shared/lib/usrlib");
-    var web = require("../../shared/lib/weblib");
-    var UserAPI = require("../../shared/lib/userapi");
-    var ReportAPI = require("../../shared/lib/reportapi");
-    var Component = require("../../shared/lib/component");
-    var Bus = require("./bus");
-    var State = require("./state");
+    var str         = require("../../shared/lib/strlib");
+    var usr         = require("../../shared/lib/usrlib");
+    var web         = require("../../shared/lib/weblib");
+    var UserAPI     = require("../../shared/lib/userapi");
+    var ReportAPI   = require("../../shared/lib/reportapi");
+    var Component   = require("../../shared/lib/component");
+    var Bus         = require("./bus");
+    var State       = require("./state");
 }
 
 /**
  * Computer(parmsComputer, parmsMachine, fSuspended)
- * 
+ *
  * @constructor
  * @extends Component
  * @param {Object} parmsComputer
@@ -93,7 +93,7 @@ if (typeof module !== 'undefined') {
  *      20 is the minimum (and the default), which implies 8086/8088 real-mode addressing,
  *      while 24 is required for 80286 protected-mode addressing.  This value is passed
  *      directly through to the Bus component; see that component for more details.
- *      
+ *
  *      resume: one of the Computer.RESUME constants, which are as follows:
  *          '0' if resume disabled (default)
  *          '1' if enabled without prompting
@@ -102,7 +102,7 @@ if (typeof module !== 'undefined') {
  *          or a string containing the path of a predefined JSON-encoded state
  *
  *      state: the path to JSON-encoded state file (see details regarding 'state' below)
- *      
+ *
  * If a predefined state is supplied AND it's successfully loaded, then resume behavior
  * defaults to '1' (ie, resume enabled without prompting).
  *
@@ -154,12 +154,12 @@ function Computer(parmsComputer, parmsMachine, fSuspended) {
     this.bus = new Bus({'id': this.idMachine + '.bus', 'buswidth': this.nBusWidth}, this.cpu, this.dbg);
 
     /*
-     * Iterate through all the components and connect them to the Control Panel, if any 
+     * Iterate through all the components and connect them to the Control Panel, if any
      */
     var iComponent, component;
     var aComponents = Component.getComponents(this.id);
     this.panel = Component.getComponentByType("Panel", this.id);
-    
+
     if (this.panel && this.panel.controlPrint) {
         for (iComponent = 0; iComponent < aComponents.length; iComponent++) {
             component = aComponents[iComponent];
@@ -198,7 +198,7 @@ function Computer(parmsComputer, parmsMachine, fSuspended) {
      * The Computer 'state' property allows a state file to be specified independent of the 'resume' feature;
      * previously, you could only use 'resume' to load a state file -- which we still support, but loading a state
      * file that way prevents the machine's state from being saved, since we always resume from the 'resume' file.
-     * 
+     *
      * The other wrinkle is on the restore side: we need to IGNORE the 'state' property if a saved state now exists.
      * So we have to peek at localStorage, and unfortunately, the only way to "peek" is to actually load the data,
      * but we're not ready to use it yet, so powerUp() has been changed to use any existing stateComputer that we've
@@ -210,7 +210,7 @@ function Computer(parmsComputer, parmsMachine, fSuspended) {
      */
     var fAllowResume;
     var sState = Component.parmsURL && Component.parmsURL['state'] || (fAllowResume = true) && parmsComputer['state'];
-    
+
     if (sState) {
         sStatePath = this.sStatePath = sState;
         if (!fAllowResume) {
@@ -229,7 +229,7 @@ function Computer(parmsComputer, parmsMachine, fSuspended) {
 
     /*
      * If sStatePath is set, we must use it.  But if there's no sStatePath AND resume is set,
-     * then we have the option of resuming from a server-side state, assuming a valid USERID. 
+     * then we have the option of resuming from a server-side state, assuming a valid USERID.
      */
     if (!sStatePath && this.resume) {
         sStatePath = this.getServerStatePath();
@@ -241,7 +241,7 @@ function Computer(parmsComputer, parmsMachine, fSuspended) {
     } else {
         web.loadResource(sStatePath, true, null, this, this.onLoadSetReady);
     }
-    
+
     if (!fSuspended) {
         /*
          * Power "up" the computer, giving every component the opportunity to reset or restore itself.
@@ -317,7 +317,7 @@ Computer.prototype.getUserID = function()
 
 /**
  * onLoadSetReady(sStateFile, sStateData, nErrorCode)
- * 
+ *
  * @this {Computer}
  * @param {string} sStateFile
  * @param {string} sStateData
@@ -327,7 +327,7 @@ Computer.prototype.onLoadSetReady = function(sStateFile, sStateData, nErrorCode)
 {
     if (!nErrorCode) {
         this.sStateData = sStateData;
-        if (DEBUG) this.messageDebugger("loaded state file " + sStateFile.replace(this.sUserID || "xxx", "xxx")); 
+        if (DEBUG) this.messageDebugger("loaded state file " + sStateFile.replace(this.sUserID || "xxx", "xxx"));
     } else {
         this.sResumePath = null;
         this.fServerState = false;
@@ -338,7 +338,7 @@ Computer.prototype.onLoadSetReady = function(sStateFile, sStateData, nErrorCode)
 
 /**
  * wait(fn, parms)
- * 
+ *
  * wait() waits until every component is ready (including ourselves, the last component we check),
  * then calls the specified Computer method.
  *
@@ -376,7 +376,7 @@ Computer.prototype.wait = function(fn, parms)
  * validateState(stateComputer)
  *
  * NOTE: We clear() stateValidate only when there's no stateComputer.
- * 
+ *
  * @this {Computer}
  * @param {State|null} [stateComputer]
  * @return {boolean} true if state passes validation, false if not
@@ -403,7 +403,7 @@ Computer.prototype.validateState = function(stateComputer)
  * powerOn(resume)
  *
  * Power every component "up", applying any previously available state information.
- * 
+ *
  * @this {Computer}
  * @param {number} [resume] is a valid RESUME value; default is this.resume
  */
@@ -455,7 +455,7 @@ Computer.prototype.powerOn = function(resume)
                             stateComputer.load(sData);
                         } else {
                             /*
-                             * A missing (or not yet created) state file is no cause for alarm, but other errors might be 
+                             * A missing (or not yet created) state file is no cause for alarm, but other errors might be
                              */
                             if (sCode == UserAPI.CODE.FAIL && sData != UserAPI.FAIL.NOSTATE) {
                                 this.notice("Error: " + sData);
@@ -529,7 +529,7 @@ Computer.prototype.powerOn = function(resume)
 
 /**
  * powerRestore(component, stateComputer, fRepower, fRestore)
- * 
+ *
  * @this {Computer}
  * @param {Component} component
  * @param {State} stateComputer
@@ -550,7 +550,7 @@ Computer.prototype.powerRestore = function(component, stateComputer, fRepower, f
                      * This is a hack that makes it possible for a machine whose ID has been
                      * supplemented with a suffix (a single letter or digit) to find object IDs
                      * in states created from a machine without the suffix.
-                     * 
+                     *
                      * For example, if a state file was created from a machine with ID "ibm5160"
                      * but the current machine is "ibm5160a", this attempts a second lookup with
                      * "ibm5160", enabling us to find objects that match the original machine ID
@@ -565,7 +565,7 @@ Computer.prototype.powerRestore = function(component, stateComputer, fRepower, f
              * string comes back, something went wrong.  By explicitly eliminating "string" data,
              * the Closure Compiler stops complaining that we might be passing strings to our
              * powerUp() functions (even though we know we're not).
-             * 
+             *
              * TODO: Determine if there's some way to coerce the Closure Compiler into treating
              * data as Object or null, without having to include this runtime check.  An assert
              * would be a good idea, but this is overkill.
@@ -629,7 +629,7 @@ Computer.prototype.powerRestore = function(component, stateComputer, fRepower, f
  * powerFinish(aParms)
  *
  * This is nothing more than a continuation of powerOn(), giving us the option of calling wait() one more time.
- * 
+ *
  * @this {Computer}
  * @param {Array} aParms containing [stateComputer, resume, fRestore]
  */
@@ -676,7 +676,7 @@ Computer.prototype.powerFinish = function(aParms)
 
 /**
  * powerReport(stateComputer)
- * 
+ *
  * @this {Computer}
  * @param {State} stateComputer
  */
@@ -712,7 +712,7 @@ Computer.prototype.powerReport = function(stateComputer)
  *
  * As it stands, the worst that happens is any manually mounted disk images might have to be manually remounted,
  * which doesn't seem like a huge problem.
- * 
+ *
  * @this {Computer}
  * @param {boolean} fSave
  * @param {boolean} [fShutdown] is true if the machine is being shut down
@@ -809,9 +809,9 @@ Computer.prototype.powerOff = function(fSave, fShutdown)
             sState = stateComputer.toString();
         }
     }
-    
+
     if (fShutdown) this.fPowered = false;
-    
+
     return sState;
 };
 
@@ -819,11 +819,11 @@ Computer.prototype.powerOff = function(fSave, fShutdown)
  * reset()
  *
  * Notify all (other) components with a reset() method that the Computer is being reset.
- * 
+ *
  * NOTE: We'd like to reset the Bus first (due to the importance of the A20 line), but since we
  * allocated the Bus object ourselves, after all the other components were allocated, it ends
  * up near the end of Component's list of components.  Hence the special case for this.bus below.
- * 
+ *
  * @this {Computer}
  */
 Computer.prototype.reset = function()
@@ -846,10 +846,10 @@ Computer.prototype.reset = function()
  * start(ms, nCycles)
  *
  * Notify all (other) components with a start() method that the CPU has started.
- * 
+ *
  * Note that we're called by runCPU(), which is why we exclude the CPU component,
  * as well as ourselves.
- * 
+ *
  * @this {Computer}
  * @param {number} ms
  * @param {number} nCycles
@@ -892,7 +892,7 @@ Computer.prototype.stop = function(ms, nCycles)
 
 /**
  * setBinding(sHTMLClass, sHTMLType, sBinding, control)
- * 
+ *
  * @this {Computer}
  * @param {string|null} sHTMLClass is the class of the HTML control (eg, "input", "output")
  * @param {string|null} sHTMLType is the type of the HTML control (eg, "button", "list", "text", "submit", "textarea", "canvas")
@@ -942,7 +942,7 @@ Computer.prototype.resetUserID = function()
 
 /**
  * queryUserID(fPrompt)
- * 
+ *
  * @param {boolean} [fPrompt]
  * @returns {string|null|undefined}
  */
@@ -968,7 +968,7 @@ Computer.prototype.queryUserID = function(fPrompt)
 
 /**
  * verifyUserID(sUserID)
- * 
+ *
  * @this {Computer}
  * @param {string} sUserID
  * @return {string} validated user ID, or null if error
@@ -1002,7 +1002,7 @@ Computer.prototype.verifyUserID = function(sUserID)
 
 /**
  * getServerStatePath()
- * 
+ *
  * @this {Computer}
  * @return {string|null} sStatePath (null if no localStorage or no USERID stored in localStorage)
  */
@@ -1020,7 +1020,7 @@ Computer.prototype.getServerStatePath = function()
 
 /**
  * saveServerState(sUserID, sState)
- * 
+ *
  * @param {string} sUserID
  * @param {string|null} sState
  */
@@ -1054,7 +1054,7 @@ Computer.prototype.saveServerState = function(sUserID, sState)
 
 /**
  * storeServerState(sUserID, sState, fSync)
- * 
+ *
  * @this {Computer}
  * @param {string} sUserID
  * @param {string} sState
@@ -1095,7 +1095,7 @@ Computer.prototype.storeServerState = function(sUserID, sState, fSync)
 
 /**
  * onReset()
- * 
+ *
  * @this {Computer}
  */
 Computer.prototype.onReset = function()
@@ -1117,7 +1117,7 @@ Computer.prototype.onReset = function()
          * and rely on all the components to reset themselves to their default state.  The components with
          * the greatest burden here are FDC and HDC, which must rely on the fReload flag to determine whether
          * or not to unload/reload all their original auto-mounted disk images.
-         * 
+         *
          * However, if we started with a predefined state (ie, sStatePath is set), we take this shortcut, because
          * we don't (yet) have code in place to gracefully reload the initial state (requires calling loadResource()
          * again); alternatively, we could avoid throwing that state away, but it seems better to save the memory.
@@ -1139,7 +1139,7 @@ Computer.prototype.onReset = function()
 
 /**
  * getComponentByType(sType, componentPrev)
- * 
+ *
  * @this {Computer}
  * @param {string} sType
  * @param {Component} [componentPrev] of previously returned component, if any
@@ -1188,19 +1188,19 @@ Computer.prototype.messageDebugger = function(sMessage, fForce)
 Computer.init = function()
 {
     var aeMachines = Component.getElementsByClass(window.document, PCJSCLASS + "-machine");
-    
+
     for (var iMachine = 0; iMachine < aeMachines.length; iMachine++) {
-        
+
         var eMachine = aeMachines[iMachine];
         var parmsMachine = Component.getComponentParms(eMachine);
 
         var aeComputers = Component.getElementsByClass(eMachine, PCJSCLASS, "computer");
-    
+
         for (var iComputer = 0; iComputer < aeComputers.length; iComputer++) {
-            
+
             var eComputer = aeComputers[iComputer];
             var parmsComputer = Component.getComponentParms(eComputer);
-            
+
             /*
              * We set fSuspended in the Computer constructor because we want to "power up" the
              * computer ourselves, after any/all bindings are in place.
@@ -1208,7 +1208,7 @@ Computer.init = function()
             var computer = new Computer(parmsComputer, parmsMachine, true);
 
             if (DEBUG) computer.messageDebugger("onInit(" + computer.fPowered + ")");
-            
+
             /*
              * For now, all we support are "reset" and "save" buttons. We may eventually add a "power"
              * button to manually suspend/resume the machine.  An "erase" button was also considered, but
@@ -1216,7 +1216,7 @@ Computer.init = function()
              * might be redundant now.
              */
             Component.bindComponentControls(computer, eComputer, PCJSCLASS);
-    
+
             /*
              * Power "up" the computer, giving every component the opportunity to reset or restore itself.
              */
@@ -1238,7 +1238,7 @@ Computer.show = function()
         if (computer) {
 
             if (DEBUG) computer.messageDebugger("onShow(" + computer.fInitialized + "," + computer.fPowered + ")");
-            
+
             if (computer.fInitialized && !computer.fPowered) {
                 /**
                  * Repower the computer, notifying every component to continue running as-is.
@@ -1285,7 +1285,7 @@ Computer.exit = function()
         if (computer) {
 
             if (DEBUG) computer.messageDebugger("onExit(" + computer.fPowered + ")");
-            
+
             if (computer.fPowered) {
                 /**
                  * Power "down" the computer, giving every component an opportunity to save its state,
diff --git a/my_modules/pcjs-client/lib/cpu.js b/my_modules/pcjs-client/lib/cpu.js
index 4efdf2f08..9f1c0ec77 100644
--- a/my_modules/pcjs-client/lib/cpu.js
+++ b/my_modules/pcjs-client/lib/cpu.js
@@ -34,9 +34,9 @@
 "use strict";
 
 if (typeof module !== 'undefined') {
-    var str = require("../../shared/lib/strlib");
-    var usr = require("../../shared/lib/usrlib");
-    var Component = require("../../shared/lib/component");
+    var str         = require("../../shared/lib/strlib");
+    var usr         = require("../../shared/lib/usrlib");
+    var Component   = require("../../shared/lib/component");
 }
 
 /**
@@ -46,9 +46,9 @@ if (typeof module !== 'undefined') {
  *
  *      cycles: the machine's base cycles per second; the X86CPU constructor will
  *      provide us with a default (based on the CPU model) to use as a fallback
- *      
+ *
  *      multiplier: base cycle multiplier; default is 1
- *      
+ *
  *      autoStart: true to automatically start, false to not, or null (default)
  *      to make the autoStart decision based on whether or not a Debugger is
  *      installed (if there's no Debugger AND no "Run" button, then auto-start,
@@ -82,7 +82,7 @@ function CPU(parmsCPU, nCyclesDefault)
     var nMultiplier = parmsCPU['multiplier'] || 1;
 
     this.nCyclesPerSecond = nCycles;
-    
+
     /*
      * nCyclesMultiplier replaces the old "speed" variable (0, 1, 2) and eliminates the need for
      * the constants (SPEED_SLOW, SPEED_FAST and SPEED_MAX).  The UI simply doubles the multiplier
@@ -113,7 +113,7 @@ function CPU(parmsCPU, nCyclesDefault)
      * Get checksum parameters, if any. runCPU() behavior is not affected until fChecksum
      * is true, which won't happen until resetChecksum() is called with nCyclesChecksumInterval
      * ("csInterval") set to a positive value.
-     * 
+     *
      * As above, any of these parameters can also be set with the Debugger's execution options
      * command ("x"); for example, "x cs int 5000" will set nCyclesChecksumInterval to 5000
      * and call resetChecksum().
@@ -126,7 +126,7 @@ function CPU(parmsCPU, nCyclesDefault)
 
     var cpu = this;
     this.onRunTimeout = function() { cpu.runCPU(); };
-    
+
     this.setReady();
 }
 
@@ -156,7 +156,7 @@ CPU.STATUS_UPDATES_PER_SECOND = 2;
 
 /**
  * initBus(cmp, bus, cpu, dbg)
- * 
+ *
  * @this {CPU}
  * @param {Computer} cmp
  * @param {Bus} bus
@@ -170,7 +170,7 @@ CPU.prototype.initBus = function(cmp, bus, cpu, dbg)
     this.cmp = cmp;
     /*
      * Attach the Video component to the CPU, so that the CPU can periodically update
-     * the video display via displayVideo(), as cycles permit. 
+     * the video display via displayVideo(), as cycles permit.
      */
     var video = cmp.getComponentByType("Video");
     if (video) {
@@ -184,7 +184,7 @@ CPU.prototype.initBus = function(cmp, bus, cpu, dbg)
     /*
      * Attach the ChipSet component to the CPU, so that it can obtain the IDT vector number of
      * pending hardware interrupts, in response to ChipSet's updateINTR() notifications.
-     * 
+     *
      * We must also call chipset.updateAllTimers() periodically; stepCPU() takes care of that.
      */
     this.chipset = cmp.getComponentByType("ChipSet");
@@ -195,7 +195,7 @@ CPU.prototype.initBus = function(cmp, bus, cpu, dbg)
  * reset()
  *
  * This is a placeholder for reset (overridden by the X86CPU component).
- * 
+ *
  * @this {CPU}
  */
 CPU.prototype.reset = function()
@@ -206,7 +206,7 @@ CPU.prototype.reset = function()
  * save()
  *
  * This is a placeholder for save support (overridden by the X86CPU component).
- * 
+ *
  * @this {CPU}
  * @return {Object|null}
  */
@@ -219,7 +219,7 @@ CPU.prototype.save = function()
  * restore(data)
  *
  * This is a placeholder for restore support (overridden by the X86CPU component).
- * 
+ *
  * @this {CPU}
  * @param {Object} data
  * @return {boolean} true if restore successful, false if not
@@ -258,7 +258,7 @@ CPU.prototype.powerUp = function(data, fRepower)
              * knows if there's a "print" control (this.cmp.panel.controlPrint), and if there IS a "print" control
              * but no debugger, the machine is probably misconfigured (most likely, the page simply neglected to
              * load the Debugger component).
-             * 
+             *
              * However, we don't actually need to check all that; it's always safe use println(), regardless whether
              * a Control Panel with a "print" control is present or not.
              */
@@ -273,7 +273,7 @@ CPU.prototype.powerUp = function(data, fRepower)
 
 /**
  * powerDown(fSave)
- * 
+ *
  * @this {CPU}
  * @param {boolean} fSave
  * @return {Object|boolean}
@@ -286,7 +286,7 @@ CPU.prototype.powerDown = function(fSave)
 
 /**
  * autoStart()
- * 
+ *
  * @this {CPU}
  * @return {boolean} true if started, false if not
  */
@@ -335,9 +335,9 @@ CPU.prototype.isRunning = function()
 
 /**
  * getChecksum()
- * 
+ *
  * This will be implemented by the X86CPU component.
- * 
+ *
  * @this {CPU}
  * @return {number} a 32-bit summation of key elements of the current CPU state (used by the CPU checksum code)
  */
@@ -352,7 +352,7 @@ CPU.prototype.getChecksum = function()
  * If checksum generation is enabled (fChecksum is true), this resets the running 32-bit checksum and the
  * cycle counter that will trigger the next displayChecksum(); called by resetCycles(), which is called whenever
  * the CPU is reset or restored.
- * 
+ *
  * @this {CPU}
  * @return {boolean} true if checksum generation enabled, false if not
  */
@@ -378,7 +378,7 @@ CPU.prototype.resetChecksum = function()
  * number of cycles (1), effectively limiting execution to a single instruction, and then we're called with
  * the exact number cycles that were actually executed.  This should give us instruction-granular checksums
  * at precise intervals that are 100% repeatable.
- * 
+ *
  * @this {CPU}
  * @param {number} nCycles
  */
@@ -409,11 +409,11 @@ CPU.prototype.updateChecksum = function(nCycles)
 
 /**
  * displayChecksum()
- * 
+ *
  * When checksum generation is enabled (fChecksum is true), this is called to provide a crude log of all
  * checksums generated at the specified cycle intervals, as specified by the "csStart" and "csInterval" parmsCPU
  * properties).
- * 
+ *
  * @this {CPU}
  */
 CPU.prototype.displayChecksum = function()
@@ -473,7 +473,7 @@ CPU.prototype.displayVideo = function()
 
 /**
  * setBinding(sHTMLClass, sHTMLType, sBinding, control)
- * 
+ *
  * @this {CPU}
  * @param {string|null} sHTMLClass is the class of the HTML control (eg, "input", "output")
  * @param {string|null} sHTMLType is the type of the HTML control (eg, "button", "list", "text", "submit", "textarea", "canvas")
@@ -539,7 +539,7 @@ CPU.prototype.setBinding = function(sHTMLClass, sHTMLType, sBinding, control)
  * A divisor greater than 1 (the default) does NOT require us to yield more frequently or update the screen
  * more frequently; it only means that stepCPU() must be called more frequently, with correspondingly smaller burst
  * cycles, because stepCPU() is responsible for updating all the timers ONCE, each time it's called.
- * 
+ *
  * @this {CPU}
  * @param {number} nDivisor
  */
@@ -652,12 +652,12 @@ CPU.prototype.getCycles = function(fScaled)
          *
          * but that speed will fluctuate somewhat: large fluctuations at first, but increasingly smaller
          * fluctuations after each burst of instructions that runCPU() executes.
-         * 
+         *
          * Alternatively, we can scale the cycle count by the multiplier, which is good in that the
          * multiplier doesn't vary once the user changes it, but a potential downside is that the
          * multiplier might be set too high, resulting in a target speed that's higher than the effective
          * speed is able to reach.
-         * 
+         *
          * Also, if multipliers were always limited to a power-of-two, then this could be calculated
          * with a simple shift.  However, only the "setSpeed" UI binding limits it that way; the Debugger
          * interface allows any value, as does the CPU "multiplier" parmsCPU property (from the machine's
@@ -717,9 +717,9 @@ CPU.prototype.getSpeed = function() {
  */
 CPU.prototype.getSpeedCurrent = function() {
     /*
-     * TODO: Has toFixed() been "fixed" in all browsers (eg, IE) to return a rounded value now? 
+     * TODO: Has toFixed() been "fixed" in all browsers (eg, IE) to return a rounded value now?
      */
-    return ((this.fRunning && this.mhz)? (this.mhz.toFixed(2) + "Mhz") : "Stopped"); 
+    return ((this.fRunning && this.mhz)? (this.mhz.toFixed(2) + "Mhz") : "Stopped");
 };
 
 /**
@@ -730,14 +730,14 @@ CPU.prototype.getSpeedCurrent = function() {
  */
 CPU.prototype.getSpeedTarget = function() {
     /*
-     * TODO: Has toFixed() been "fixed" in all browsers (eg, IE) to return a rounded value now? 
+     * TODO: Has toFixed() been "fixed" in all browsers (eg, IE) to return a rounded value now?
      */
     return this.mhzTarget.toFixed(2) + "Mhz";
 };
 
 /**
  * setSpeed(nMultiplier, fOnClick)
- * 
+ *
  * @this {CPU}
  * @param {number} [nMultiplier] is the new proposed multiplier (reverts to 1 if the target was too high)
  * @param {boolean} [fOnClick] is true if called from a click handler that might have stolen focus
@@ -774,7 +774,7 @@ CPU.prototype.setSpeed = function(nMultiplier, fOnClick)
 
 /**
  * calcSpeed(nCycles, msElapsed)
- * 
+ *
  * @this {CPU}
  * @param {number} nCycles
  * @param {number} msElapsed
@@ -793,7 +793,7 @@ CPU.prototype.calcSpeed = function(nCycles, msElapsed)
 
 /**
  * calcStartTime()
- * 
+ *
  * @this {CPU}
  */
 CPU.prototype.calcStartTime = function()
@@ -808,22 +808,22 @@ CPU.prototype.calcStartTime = function()
      * Try to detect situations where the browser may have throttled us, such as when the user switches
      * to a different tab; in those situations, Chrome and Safari may restrict setTimeout() callbacks
      * to roughly one per second.
-     * 
+     *
      * Another scenario: the user resizes the browser window.  setTimeout() callbacks are not throttled,
      * but there can still be enough of a lag between the callbacks that CPU speed will be noticeably
      * erratic if we don't compensate for it here.
-     * 
+     *
      * We can detect throttling/lagging by verifying that msEndThisRun (which was set at the end of the
      * previous run and includes any requested sleep time) is comparable to the current msStartThisRun;
      * if the delta is significant, we compensate by bumping msRunStart forward by that delta.
-     * 
+     *
      * This shouldn't be triggered when the Debugger halts the CPU, because setSpeed() -- which is called
      * whenever the CPU starts running again -- zeroes msEndThisRun.
-     * 
+     *
      * This also won't do anything about other internal delays; for example, Debugger message() calls.
      * By the time the message() function has called yieldCPU(), the cost of the message has already been
      * incurred, so it will be end up being charged against the instruction(s) that triggered them.
-     * 
+     *
      * TODO: Consider calling yieldCPU() sooner from message(), so that it can arrange for the msEndThisRun
      * "snapshot" to occur sooner; it's unclear, however, whether that will really improve the CPU's ability
      * to hit its target speed, since you would expect any instruction that displays a message to be an
@@ -849,14 +849,14 @@ CPU.prototype.calcStartTime = function()
 
 /**
  * calcRemainingTime()
- * 
+ *
  * @this {CPU}
  * @return {number}
  */
 CPU.prototype.calcRemainingTime = function()
 {
     this.msEndThisRun = usr.getTime();
-    
+
     var msYield = this.msPerYield;
     if (this.nCyclesThisRun) {
         /*
@@ -906,7 +906,7 @@ CPU.prototype.calcRemainingTime = function()
 
     /*
      * Last but not least, update nRecalcCycles, so that when runCPU() starts up again and calls calcStartTime(),
-     * it'll be ready to decide if calcCycles() should be called again.  
+     * it'll be ready to decide if calcCycles() should be called again.
      */
     this.nRecalcCycles += this.nCyclesThisRun;
 
@@ -920,7 +920,7 @@ CPU.prototype.calcRemainingTime = function()
 
 /**
  * runCPU(fOnClick)
- * 
+ *
  * @this {CPU}
  * @param {boolean} [fOnClick] is true if called from a click handler that might have stolen focus
  */
@@ -953,7 +953,7 @@ CPU.prototype.runCPU = function(fOnClick)
     try {
         do {
             var nCyclesPerBurst = this.fChecksum? 1 : Math.round(this.nCyclesPerBurst / this.nBurstDivisor);
-            
+
             /*
              * This is an alternative to ChipSet calling setBurstDivisor().  Unfortunately, this doesn't seem
              * to work as well as setBurstDivisor(); for some reason, the smaller bursts that the burst divisor
@@ -965,7 +965,7 @@ CPU.prototype.runCPU = function(fOnClick)
              *      nCyclesPerBurst = nCyclesTimer0;
              *  }
              */
-            
+
             /*
              * nCyclesPerBurst is how many cycles we WANT to run on each iteration of stepCPU(), but it may run
              * significantly less (or slightly more, since we can't execute partial instructions).
@@ -1015,7 +1015,7 @@ CPU.prototype.runCPU = function(fOnClick)
 
 /**
  * setBurstCycles(nCycles)
- * 
+ *
  * This function is used by the ChipSet component whenever a very low timer count is set,
  * in anticipation of the timer requiring an update sooner than the normal nCyclesPerYield
  * period in runCPU() would normally provide.
@@ -1046,7 +1046,7 @@ CPU.prototype.setBurstCycles = function(nCycles)
  *
  * This similar to yieldCPU(), but it doesn't need to zero nCyclesNextYield to break out of runCPU();
  * it simply needs to clear fRunning (well, "simply" may be oversimplifying a bit....)
- * 
+ *
  * @this {CPU}
  * @param {boolean} [fComplete]
  */
@@ -1067,7 +1067,7 @@ CPU.prototype.haltCPU = function(fComplete)
 
 /**
  * stepCPU(nMinCycles)
- * 
+ *
  * This will be implemented by the X86CPU component.
  *
  * @this {CPU}
@@ -1086,7 +1086,7 @@ CPU.prototype.stepCPU = function(nMinCycles)
  * stepCPU() -- needed to have more control over when these updates are performed.  However, for
  * other callers of stepCPU(), such as the Debugger, the combination of stepCPU() + updateCPU()
  * provides the old behavior.
- * 
+ *
  * @this {CPU}
  */
 CPU.prototype.updateCPU = function()
@@ -1097,7 +1097,7 @@ CPU.prototype.updateCPU = function()
 
 /**
  * yieldCPU()
- * 
+ *
  * Similar to haltCPU() with regard to how it resets various cycle countdown values, but the CPU
  * remains in a "running" state.
  *
diff --git a/my_modules/pcjs-client/lib/debugger.js b/my_modules/pcjs-client/lib/debugger.js
index fc8bab5af..f91620ff4 100644
--- a/my_modules/pcjs-client/lib/debugger.js
+++ b/my_modules/pcjs-client/lib/debugger.js
@@ -35,15 +35,15 @@
 
 if (DEBUGGER) {
     if (typeof module !== 'undefined') {
-        var str = require("../../shared/lib/strlib");
-        var usr = require("../../shared/lib/usrlib");
-        var web = require("../../shared/lib/weblib");
-        var Component = require("../../shared/lib/component");
-        var Bus = require("./bus");
-        var State = require("./state");
-        var CPU = require("./cpu");
-        var X86 = require("./x86");
-        var X86Seg = require("./x86seg");
+        var str         = require("../../shared/lib/strlib");
+        var usr         = require("../../shared/lib/usrlib");
+        var web         = require("../../shared/lib/weblib");
+        var Component   = require("../../shared/lib/component");
+        var Bus         = require("./bus");
+        var State       = require("./state");
+        var CPU         = require("./cpu");
+        var X86         = require("./x86");
+        var X86Seg      = require("./x86seg");
     }
 }
 
diff --git a/my_modules/pcjs-client/lib/disk.js b/my_modules/pcjs-client/lib/disk.js
index 00b26ac88..134ac2383 100644
--- a/my_modules/pcjs-client/lib/disk.js
+++ b/my_modules/pcjs-client/lib/disk.js
@@ -51,19 +51,19 @@
 
 /*
  * Client/Server Disk I/O
- *  
+ *
  * To support large disks without consuming large amounts of client-side memory, and to push
  * client-side disk changes back the server, we need a DiskIO API that can be used in place of
  * the DiskDump API.
- *  
+ *
  * Use of the DiskIO API and any associated disk images must be tightly coupled to per-user
  * storage and specific machine configurations, to prevent the disk images from being corrupted
  * by inconsistent I/O operations.  Our basic User API (userapi.js) already provides some
  * per-user storage that we can use to get the design rolling.
- * 
+ *
  * The DiskIO API must also provide the ability to create new (empty) hard disk images in per-user
  * storage and automatically associate them with the machine configurations that requested them.
- * 
+ *
  * Principles
  * ---
  * Originally, when the Disk class was given a disk image to load and mount, it would request the
@@ -71,84 +71,84 @@
  * for larger disks -- let's just say anything stored on the server as an IMG file -- we'd prefer
  * to interact with that disk using "On-Demand I/O".  Any IMG file on the same server as the PCjs
  * application should be a candidate for on-demand access.
- * 
+ *
  * On-Demand I/O means that nothing is initially transferred from the server.  As sectors are
  * requested by the PCjs machine, PCjs requests them from the server, and maintains an MRU cache
  * of sectors, periodically discarding the least-used clean sectors above a certain memory limit.
  * Dirty sectors (ie, those that the PCjs machine has written to) must be periodically sent
  * back to the server and then marked as clean, so that they can be discarded like any other
  * sector.
- * 
+ *
  * We also support "local" init-only disk images, which means that dirty sectors are never sent
  * back to the server and are instead retained by the client for the lifetime of the app; such
  * images are "read-only" as far as the server is concerned, but "read-write" as far as the client
  * is concerned.  Reloading/restarting an app with an "local" disk will return the disk to its
- * initial state. 
- * 
+ * initial state.
+ *
  * Practice
  * ---
  * Let's first look at what we *already* do for the HDC component:
- * 
+ *
  *  1) Creating new (empty) disk images
  *  2) Pre-loading pre-built JSON-encoded disk images (converting them to JSON on the fly as needed)
- *  
+ *
  * An example of #1 is in /configs/pc/machines/5160/cga/256kb/demo/machine.xml:
- * 
+ *
  *      
- *      
+ *
  * and an example of #2 is in /configs/pc/disks/fixed/win101.xml:
- * 
+ *
  *      
  *
  * The HDC component expects an array of drive entries.  Array position determines drive numbering
  * (the first entry is drive 0, the second is drive 1, etc), and each entry contains the following
  * properties:
- * 
+ *
  *      'name': user-friendly name for the disk, if any
  *      'path': URL of the disk image, if any
  *      'type': a drive type
- * 
+ *
  * Of those properties, only 'type' is required, which provides an index into an HDC "Drive Type"
  * table that determines disk geometry and therefore disk size.  As we add support for larger disks and
  * newer disk controllers, the 'type' parameter will be superseded by either a user-defined 'geometry'
  * parameter that will define number of heads, cylinders, tracks, sectors per track, and (max) bytes per
  * sector, or perhaps a generic 'size' parameter that leaves geometry choices to the HDC component,
  * which will then pass those decisions on to the Disk component.
- * 
+ *
  * We will enable on-demand I/O for a disk image with a new 'mode' parameter that looks like:
- * 
+ *
  *      'mode': one of "local", "preload", "demandrw", "demandro"
- * 
+ *
  * "preload" means the disk image will be completely preloaded, exactly as before; "demandrw" enables
  * full on-demand I/O support; and "demandro" enables on-demand I/O for reads only (all writes are retained
  * and never written back to the server).
- * 
+ *
  * "ro" will be the fallback for "rw" unless TWO other important criteria are met: 1) the user has a
  * private user key, and therefore per-user storage; and 2) the disk image 'path' contains an asterisk (*)
  * that the server can internally remap to a directory in the user's storage; eg:
- * 
+ *
  *      'path': /10mb.img (path components following the asterisk are optional)
- *      
+ *
  * If the disk image does not already exist, it will be created (but not formatted).
- * 
+ *
  * This preserves the promise that EVERYTHING a user does within a PCjs machine is private (ie, not
  * visible to any other PCjs users).  I don't want to be in the business of saving any user machine
  * states or disk changes, but at least those operations are limited to users who have asked for (and
  * received) a private user key.
- * 
+ *
  * Another important consideration at this stage is dealing with multiple machines writing to the same
  * disk image; even though we're limiting the "demandrw" mode to per-user images, a single user may still
  * inadvertently start up multiple machines that refer to the same disk image.
- * 
+ *
  * So, every PCjs machine needs to generate a unique token and include that token with every Disk I/O API
  * operation, so that the server can revoke a previous machine's "rw" access to a disk image when a new
  * machine requests "rw" access to the same disk image.
- * 
+ *
  * From the client's perspective, revocation can be quietly dealt with by reverting to "demandro" mode;
  * that client becomes stuck with all their dirty sectors until they can reclaim "rw" access, which should
  * only happen if no intervening writes to the disk image on the server have occurred (if I bother allowing
  * reclamation at all).
- * 
+ *
  * The real challenge here is avoiding revocation of a machine that still has critical changes to commit,
  * but since we can't even solve the problem of a user closing their browser at an inopportune time
  * and potentially leaving a disk image in an inconsistent state, premature revocation is the least of
@@ -159,12 +159,12 @@
 "use strict";
 
 if (typeof module !== 'undefined') {
-    var str = require("../../shared/lib/strlib");
-    var usr = require("../../shared/lib/usrlib");
-    var web = require("../../shared/lib/weblib");
-    var DiskAPI = require("../../shared/lib/diskapi");
-    var DumpAPI = require("../../shared/lib/dumpapi");
-    var Component = require("../../shared/lib/component");
+    var str         = require("../../shared/lib/strlib");
+    var usr         = require("../../shared/lib/usrlib");
+    var web         = require("../../shared/lib/weblib");
+    var DiskAPI     = require("../../shared/lib/diskapi");
+    var DumpAPI     = require("../../shared/lib/dumpapi");
+    var Component   = require("../../shared/lib/component");
 }
 
 /**
@@ -177,7 +177,7 @@ if (typeof module !== 'undefined') {
  * @property {number} iHead
  * @property {number} iModify
  * @property {number} cModify
- * 
+ *
  * Every Sector object (once loaded and fully parsed) should have ALL of the following named properties:
  *
  *      'sector':   sector number
@@ -186,7 +186,7 @@ if (typeof module !== 'undefined') {
  *      'pattern':  dword pattern to use for empty or partial sectors (or null if sector still needs to be loaded)
  *
  * initSector() also sets the following properties, to help us quickly identify its location within aDiskData:
- * 
+ *
  *      iCylinder
  *      iHead
  *
@@ -195,7 +195,7 @@ if (typeof module !== 'undefined') {
  *      iModify:    index of first modified dword in sector
  *      cModify:    number of modified dwords in sector
  *      fDirty:     true if sector is dirty, false if clean (or cleaning in progress)
- *      
+ *
  * fDirty is used in conjunction with "demandrw" disks; it is set to true whenever the sector is modified, and is
  * set to false whenever the sector has been sent to the server.  If the server write succeeds and fDirty is still
  * false, then the sector modifications are removed (cModify is set to zero).  If the write succeeds but fDirty was
@@ -203,7 +203,7 @@ if (typeof module !== 'undefined') {
  * in place (since we don't keep track of more than one modification range within a sector).  And if the write failed,
  * then fDirty is set back to true and again all modifications remain in place; the best we can do is schedule another
  * write attempt.
- * 
+ *
  * TODO: Perhaps we should also maintain a failure count and stop trying to write sectors that reach a certain
  * threshold.  Error-handling, as usual, is the thorniest problem.
  */
@@ -223,7 +223,7 @@ if (typeof module !== 'undefined') {
  *
  * This means, for example, that all references to "track[iSector].data" must actually appear as
  * "track[iSector]['data']".
- * 
+ *
  * @constructor
  * @extends Component
  * @param {HDC|FDC} controller
@@ -233,13 +233,13 @@ if (typeof module !== 'undefined') {
 function Disk(controller, drive, mode)
 {
     Component.call(this, "Disk", {'id': controller.idMachine + ".disk" + Disk.nDisks++}, Disk);
-    
+
     this.controller = controller;
     this.cmp = controller.cmp;
     this.dbg = controller.dbg;
     this.drive = drive;
     this.mode = mode;
-    
+
     /*
      * We pull out a number of drive properties that we may or may not need as defaults
      */
@@ -258,11 +258,11 @@ function Disk(controller, drive, mode)
 
     /*
      * The following dirty sector and timer properties are used only with fOnDemand disks,
-     * assuming fRemote was successfully set. 
+     * assuming fRemote was successfully set.
      */
     this.aDirtySectors = [];
     this.aDirtyTimestamps = [];         // this array is parallel to aDirtySectors
-    this.timerWrite = null;             // REMOTE_WRITE_DELAY timer in effect, if any 
+    this.timerWrite = null;             // REMOTE_WRITE_DELAY timer in effect, if any
     this.msTimerWrite = 0;              // the time that the write timer, if any, is set to fire
     this.fWriteInProgress = false;
 
@@ -276,12 +276,12 @@ function Disk(controller, drive, mode)
  * @property {number} 2 contains iSector
  * @property {number} 3 contains nSectors
  * @property {boolean} 4 contains fAsync
- * @property {function(nErrorCode:number,fAsync:boolean)} 5 contains done  
+ * @property {function(nErrorCode:number,fAsync:boolean)} 5 contains done
  */
 
 /**
  * The default number of milliseconds to wait before writing a dirty sector back to a remote disk image
- * 
+ *
  * @const {number}
  */
 Disk.REMOTE_WRITE_DELAY = 2000;         // 2-second delay
@@ -295,7 +295,7 @@ Component.subclass(Component, Disk);
 
 /**
  * initBus(cmp, bus, cpu, dbg)
- * 
+ *
  * We have no real interest in this notification, other than to obtain a reference to the Debugger
  * for every disk loaded BEFORE the initBus() phase; any disk loaded AFTER that point will get its Debugger
  * reference, if any, from the disk controller passed to the Disk() constructor.
@@ -315,7 +315,7 @@ Disk.prototype.initBus = function(cmp, bus, cpu, dbg) {
  *
  * As with powerDown(), our sole concern here is for REMOTE disks: if a powerDown() call disconnected an
  * "on-demand" disk, we need to get reconnected.  Calling our own load() function should get the job done.
- * 
+ *
  * The HDC component could have triggered this as well, but its powerUp() function only calls autoMount()
  * in case of page (ie, application) reload, which is fine for local disks but insufficient for remote disks,
  * which have a server connection that must re-established.
@@ -339,14 +339,14 @@ Disk.prototype.powerUp = function(data, fRepower) {
  *
  * Our sole concern here is for REMOTE disks, making sure any unwritten changes get flushed to
  * the server during a shutdown.  No local state is ever returned, so fSave is ignored.
- * 
+ *
  * Local disks are managed by the controller (ie, FDC or HDC) that mounted them; the controller's
  * powerDown() handler will take care of calling save() as needed.
- * 
+ *
  * TODO: Consider taking responsibility for saving the state of local disks as well; the only reason
  * the controllers still take care of them is historical, because this component originally didn't
  * exist, and even after it was created, it didn't originally receive powerDown() notifications.
- * 
+ *
  * @this {Disk}
  * @param {boolean} fSave
  * @param {boolean} [fShutdown]
@@ -385,7 +385,7 @@ Disk.prototype.powerDown = function(fSave, fShutdown)
 
 /**
  * create()
- * 
+ *
  * Initializes the disk contents according to the current drive mode and parameters.
  */
 Disk.prototype.create = function()
@@ -407,7 +407,7 @@ Disk.prototype.create = function()
                      * Now that our read() and write() functions can deal with unallocated data
                      * arrays, and can read/write the specified pattern on-the-fly, we no longer need
                      * to pre-allocate and pre-initialize the 'data' array.
-                     * 
+                     *
                      * For "local" disks, we can assume a 'pattern' of 0, but for "demandrw" and "demandro"
                      * disks, 'pattern' is set to null, as yet another indication that I/O is required to load
                      * the sector from the server (or to write it back to the server).
@@ -429,12 +429,12 @@ Disk.prototype.create = function()
  * TODO: Figure out how we can strongly type fnNotify, because the Closure Compiler has issues with:
  *
  *      param {function(Component,Object,Disk,string,string)} fnNotify
- *      
+ *
  * Also, while we're at it, learn if there are ways to:
- * 
+ *
  *      1) declare a function taking NO parameters (ie, generate a warning if any parameters are specified)
  *      2) declare a type for a function's return value
- * 
+ *
  * @this {Disk}
  * @param {string} sDiskName
  * @param {string} sDiskPath
@@ -443,7 +443,7 @@ Disk.prototype.create = function()
 Disk.prototype.load = function(sDiskName, sDiskPath, fnNotify)
 {
     var sDiskURL = sDiskPath;
-    
+
     /*
      * We could use this.log() as well, but it wouldn't also log which component initiated the load.
      */
@@ -452,7 +452,7 @@ Disk.prototype.load = function(sDiskName, sDiskPath, fnNotify)
         this.controller.log(sMessage);
         this.messageDebugger(sMessage);
     }
-    
+
     this.sDiskName = sDiskName;
     this.sDiskPath = sDiskPath;
     this.fnNotify = fnNotify;
@@ -484,16 +484,16 @@ Disk.prototype.load = function(sDiskName, sDiskPath, fnNotify)
                  * disk BPBs, you'll always get a standard PC XT 10mb disk image, so if the 'file' or 'dir' contains
                  * more than 10mb of data, the request will fail.  Ultimately, I want to honor the controller's
                  * driveConfig 'size' parm, or to match the capacity required by the driveConfig 'type' parameter.
-                 * 
+                 *
                  * If a 'disk' is specified, we pass mbhd=0, because the actual size will depend on the image.
                  * However, I don't currently have any .DSK or .IMG files containing hard disk images; those formats
                  * were really intended for floppy disk images.  If I never create any hard disk image files, then
                  * we can simply eliminate sSizeParm in the 'disk' case.
-                 * 
+                 *
                  * Added more extensions to the list of paths-treated-as-disk-images, so that URLs to files located here:
-                 * 
+                 *
                  *      ftp://ftp.oldskool.org/pub/TOPBENCH/dskimage/
-                 *      
+                 *
                  * can be used as-is.  TODO: There's a TODO in netlib.getFile() regarding remote support that needs
                  * to be resolved first; DiskDump relies on that function for its remote requests, and it currently
                  * supports only HTTP.
@@ -513,10 +513,10 @@ Disk.prototype.load = function(sDiskName, sDiskPath, fnNotify)
 
 /**
  * onLoadDisk(sDiskFile, sDiskData, nErrorCode, sDiskPath)
- * 
+ *
  * This function was originally called mount().  If the mount is successful, we pass the Disk object to the
  * caller's fnNotify handler; otherwise, we pass null.
- * 
+ *
  * @this {Disk}
  * @param {string} sDiskFile
  * @param {string} sDiskData
@@ -578,18 +578,18 @@ Disk.prototype.onLoadDisk = function(sDiskFile, sDiskData, nErrorCode, sDiskPath
              * eval().  In particular, the 10Mb disk image we use for the Windows 1.01 demo config fails in
              * IE9 with an "Out of memory" exception.  One work-around would be to chop the data into chunks
              * (perhaps one track per chunk, using regular expressions) and then manually re-assemble it.
-             * 
+             *
              * However, it turns out that using JSON.parse(sDiskData) instead of eval("(" + sDiskData + ")")
              * is a much easier fix. The only drawback is that we must first quote any unquoted property names
              * and remove any comments, because while eval() was cool with them, JSON.parse() is more particular;
              * the following RegExp replacements take care of those requirements.
-             * 
+             *
              * The use of hex values is something else that eval() was OK with, but JSON.parse() is not, and
              * while I've stopped using hex values in DumpAPI responses (at least when "format=json" is specified),
              * I can't guarantee they won't show up in "legacy" images, and there's no simple RegExp replacement
              * for transforming hex values into decimal values, so I cop out and fall back to eval() if I detect
              * any hex prefixes ("0x") in the sequence.  Ditto for error messages, which appear like so:
-             * 
+             *
              *      ["unrecognized disk path: test.img"]
              */
             var aDiskData;
@@ -622,18 +622,18 @@ Disk.prototype.onLoadDisk = function(sDiskFile, sDiskData, nErrorCode, sDiskPath
              * aDiskData is an array of cylinders, each of which is an array of heads, each of which
              * is an array of sector objects.  The format does not impose any limitations on number of
              * cylinders, number of heads, or number of bytes in any of the sector object byte-arrays.
-             * 
+             *
              * WARNING: All accesses to sector object properties must be via their string names, not their
              * "dot" names, otherwise code will break after it's been processed by the Closure Compiler.
-             * 
+             *
              * Sector object properties include:
-             * 
+             *
              *      'sector'    the sector number (1-based, not required to be sequential)
              *      'length'    the byte-length (ie, formatted length) of the sector
              *      'data'      the dword-array containing the sector data
              *      'pattern'   if the dword-array length is less than 'length'/4, this value must be used
              *                  to pad out the sector; if no 'pattern' is specified, it's assumed to be zero
-             *                  
+             *
              * We still support the older JSON encoding, where sector data was encoded as an array of 'bytes'
              * rather than a dword 'data' array.  However, our support is strictly limited to an on-the-fly
              * conversion to a forward-compatible 'data' array.
@@ -698,27 +698,27 @@ Disk.prototype.onLoadDisk = function(sDiskFile, sDiskData, nErrorCode, sDiskPath
                             }
                             /*
                              * The current sector should now have ALL the properties of a proper Sector object; ie:
-                             * 
+                             *
                              *      'sector':   sector number
                              *      'length':   size of the sector, in bytes
                              *      'data':     array of dwords
                              *      'pattern':  dword pattern to use for empty or partial sectors
-                             *      
+                             *
                              * In addition, we will maintain the following information on a per-sector basis,
                              * as sectors are modified:
-                             * 
+                             *
                              *      iModify:    index of first modified dword in sector
                              *      cModify:    number of modified dwords in sector
                              *      fDirty:     true if sector is dirty, false if clean (or cleaning in progress)
-                             *      
+                             *
                              * And for the disk as a whole, we maintain a checksum of the original unmodified data:
-                             * 
+                             *
                              *      dwChecksum: summation of all dwords in all non-empty sectors
                              */
                             this.initSector(sector, iCylinder, iHead);
                             /*
                              * Pattern-filling of sectors is deferred until absolutely necessary (eg, when a sector is
-                             * being written).  So all we need to do at this point is checksum all the initial sector data. 
+                             * being written).  So all we need to do at this point is checksum all the initial sector data.
                              */
                             for (var idw = 0; idw < adw.length; idw++) {
                                 dwChecksum = (dwChecksum + adw[idw]) & 0xffffffff;
@@ -741,7 +741,7 @@ Disk.prototype.onLoadDisk = function(sDiskFile, sDiskData, nErrorCode, sDiskPath
 
 /**
  * initSector(sector, iCylinder, iHead, iSector, cbSector, dwPattern)
- * 
+ *
  * @param {Object} sector
  * @param {number} iCylinder
  * @param {number} iHead
@@ -779,7 +779,7 @@ Disk.prototype.onLoadParseSectors = function(sURLName, sURLData, nErrorCode, sec
         var iSector = sectorInfo[2];
         var nSectors = sectorInfo[3];
         fAsync = sectorInfo[4];
-        
+
         if (DEBUG) this.messageDebugger("Disk.onLoadParseSectors(" + iCylinder + ":" + iHead + ":" + iSector + ":" + nSectors + ")");
 
         var abData = JSON.parse(sURLData);
@@ -788,10 +788,10 @@ Disk.prototype.onLoadParseSectors = function(sURLName, sURLData, nErrorCode, sec
             /*
              * We call seek with fWrite == true to prevent seek() from triggering another call
              * to readRemoteSectors() and endlessly recursing.  That also forces seek() to:
-             * 
+             *
              *  1) zero the sector's 'pattern'
              *  2) disable warning about reading an uninitialized sector
-             *  
+             *
              * We KNOW this is an uninitialized sector, because we're about to initialize it.
              */
             var sector = this.seek(iCylinder, iHead, iSector, true);
@@ -814,11 +814,11 @@ Disk.prototype.onLoadParseSectors = function(sURLName, sURLData, nErrorCode, sec
 
 /**
  * connectRemoteDisk(sDiskPath)
- * 
+ *
  * Unlike disconnect(), we don't issue the connect request ourselves; instead, we piggyback on the existing
  * preload code in load() to establish the connection.  That, in turn, will trigger a call to mount(), which
  * will check fOnDemand and set fRemote if the connection was successful.
- * 
+ *
  * @this {Disk}
  * @param {string} sDiskPath
  * @return {string} is the URL connection string required to connect to sDiskPath
@@ -836,7 +836,7 @@ Disk.prototype.connectRemoteDisk = function(sDiskPath)
 
 /**
  * readRemoteSectors(iCylinder, iHead, iSector, nSectors, done)
- * 
+ *
  * @param {number} iCylinder
  * @param {number} iHead
  * @param {number} iSector
@@ -847,7 +847,7 @@ Disk.prototype.connectRemoteDisk = function(sDiskPath)
 Disk.prototype.readRemoteSectors = function(iCylinder, iHead, iSector, cbSector, nSectors, done)
 {
     if (DEBUG) this.messageDebugger("Disk.readRemoteSectors(" + iCylinder + ":" + iHead + ":" + iSector + ":" + nSectors + "," + cbSector + ")");
-    
+
     if (this.fRemote) {
         var sParms = DiskAPI.QUERY.ACTION + '=' + DiskAPI.ACTION.READ;
         sParms += '&' + DiskAPI.QUERY.VOLUME + '=' + this.sDiskPath;
@@ -868,12 +868,12 @@ Disk.prototype.readRemoteSectors = function(iCylinder, iHead, iSector, cbSector,
  * Writes to a remote disk are performed on a timer-driven basis.  When a sector is modified for the first time,
  * a reference to that sector is "pushed" onto (ie, appended to the end of) aDirtySectors, and if aDirtySectors was
  * originally empty, then a REMOTE_WRITE_DELAY timer is set.
- * 
+ *
  * When the timer fires, the first batch of contiguous sectors is sent off the server, and when the server responds
  * (ie, when cleanDirtySectors() is called), if the response indicates success, every sector that was sent is marked
  * clean -- unless one or more writes to the sector occurred in the meantime, which we track through a per-sector
- * fDirty flag. 
- * 
+ * fDirty flag.
+ *
  * @param {number} iCylinder
  * @param {number} iHead
  * @param {number} iSector
@@ -885,7 +885,7 @@ Disk.prototype.readRemoteSectors = function(iCylinder, iHead, iSector, cbSector,
 Disk.prototype.writeRemoteSectors = function(iCylinder, iHead, iSector, nSectors, abSectors, fAsync)
 {
     if (DEBUG) this.messageDebugger("Disk.writeRemoteSectors(" + iCylinder + ":" + iHead + ":" + iSector + ":" + nSectors + ")");
-    
+
     if (this.fRemote) {
         var data = {};
         this.fWriteInProgress = true;
@@ -904,7 +904,7 @@ Disk.prototype.writeRemoteSectors = function(iCylinder, iHead, iSector, nSectors
 
 /**
  * disconnectRemoteDisk()
- * 
+ *
  * This is called by our powerDown() notification handler.  If fRemote is true, we issue the disconnect request and
  * then immediately set fRemote to false; we don't wait for (or test) the response.
  *
@@ -928,7 +928,7 @@ Disk.prototype.disconnectRemoteDisk = function()
  *
  * Mark the specified sector as dirty, add it to the queue (aDirtySectors) if not already added,
  * and establish a timeout handler (findDirtySectors) if not already established.
- * 
+ *
  * A freshly dirtied sector should sit in the queue for a short period of time (eg, 2 seconds)
  * before we attempt to write it; that is, a REMOTE_WRITE_DELAY timer should start ticking again
  * for any sector that is rewritten.  However, there will be exceptions; for example, when a sector
@@ -961,7 +961,7 @@ Disk.prototype.queueDirtySector = function(sector, fAsync)
  *
  * If a timer is already active, make sure it's still valid (ie, the time the timer is scheduled to fire is
  * >= the timestamp of the next dirty sector + REMOTE_WRITE_DELAY); if not, cancel the timer and start a new one.
- * 
+ *
  * @return {boolean} true if write timer set, false if not
  */
 Disk.prototype.updateWriteTimer = function()
@@ -1050,7 +1050,7 @@ Disk.prototype.onWriteCleanSectors = function(sURLName, sURLData, nErrorCode, se
     var nSectors = sectorInfo[3];
     var fAsync = sectorInfo[4];
     this.fWriteInProgress = false;
-    
+
     if (iCylinder >= 0 && iCylinder < this.aDiskData.length && iHead >= 0 && iHead < this.aDiskData[iCylinder].length) {
         for (var i = iSector - 1; nSectors-- > 0 && i >= 0 && i < this.aDiskData[iCylinder][iHead].length; i++) {
             var sector = this.aDiskData[iCylinder][iHead][i];
@@ -1071,7 +1071,7 @@ Disk.prototype.onWriteCleanSectors = function(sURLName, sURLData, nErrorCode, se
 
 /**
  * info()
- * 
+ *
  * @this {Disk}
  * @return {Array} containing: [nCylinders, nHeads, nSectorsPerTrack, nBytesPerSector]
  */
@@ -1079,7 +1079,7 @@ Disk.prototype.info = function()
 {
     if (!this.aDiskData.length) {
         return [0, 0, 0, 0];
-    } 
+    }
     return [this.aDiskData.length, this.aDiskData[0].length, this.aDiskData[0][0].length, this.aDiskData[0][0][0]['length']];
 };
 
@@ -1091,7 +1091,7 @@ Disk.prototype.info = function()
  * Sectors that were initially compressed should remain compressed unless/until they were modified.
  *
  * TODO: Check sectors (or at least modified sectors) to see if they can be recompressed.
- * 
+ *
  * @this {Disk}
  * @return {string} containing the entire disk image as JSON-encoded data
  */
@@ -1104,7 +1104,7 @@ Disk.prototype.dump = function()
      * back again during mount() -- or whenever JSON.parse() is used instead of eval().  But I still remove
      * them temporarily, so that any remaining property names (eg, "iModify", "cModify", "fDirty") can
      * easily be stripped out, by virtue of their being the only quoted properties left.  We then "requote"
-     * all the property names that remain. 
+     * all the property names that remain.
      */
     s = s.replace(/"(sector|length|data|pattern)":/gm, "$1:");
     /*
@@ -1124,17 +1124,17 @@ Disk.prototype.dump = function()
  * properties.  That code used to be in the FDC component, where it was perfectly reasonable
  * to access those properties.  We need a cleaner interface back to the drive, similar to the
  * info() interface we provide to the controller.
- * 
+ *
  * Whether or not the "dynamic reconfiguration" feature itself is perfectly reasonable is,
  * of course, a separate question.
- * 
+ *
  * @this {Disk}
  * @param {number} iCylinder
  * @param {number} iHead
  * @param {number} iSector
  * @param {boolean} [fWrite]
  * @param {function(Object,boolean)} [done]
- * @return {Object|null} is the requested sector, or null if not found (or not available yet) 
+ * @return {Object|null} is the requested sector, or null if not found (or not available yet)
  */
 Disk.prototype.seek = function(iCylinder, iHead, iSector, fWrite, done)
 {
@@ -1181,7 +1181,7 @@ Disk.prototype.seek = function(iCylinder, iHead, iSector, fWrite, done)
                             this.readRemoteSectors(iCylinder, iHead, iSector, drive.cbSector, nSectors, function onReadRemoteComplete(err, fAsync) {
                                 if (err) sector = null;
                                 // noinspection JSReferencingMutableVariableFromClosure
-                                done(sector, fAsync);           
+                                done(sector, fAsync);
                             });
                             return null;
                         } else {
@@ -1205,7 +1205,7 @@ Disk.prototype.seek = function(iCylinder, iHead, iSector, fWrite, done)
 
 /**
  * fill(sector, ab, off)
- * 
+ *
  * @param {Object} sector
  * @param {*} ab (technically, this should be typed as Array. but I'm having trouble coercing JSON.parse() to that)
  * @param {number} off
@@ -1251,7 +1251,7 @@ Disk.prototype.toBytes = function(sector)
 
 /**
  * read(sector, ibSector, fCompare)
- * 
+ *
  * @this {Disk}
  * @param {Object} sector (returned from a previous seek)
  * @param {number} ibSector a byte index within the given sector
@@ -1261,7 +1261,7 @@ Disk.prototype.toBytes = function(sector)
 Disk.prototype.read = function(sector, ibSector, fCompare)
 {
     var b = -1;
-    
+
     if (DEBUG && !ibSector && !fCompare) this.messageDebugger("Disk.read(" + this.controller.id + ":" + this.drive.iDrive + "," + sector.iCylinder + ":" + sector.iHead + ":" + sector['sector'] + ")");
 
     if (ibSector < sector['length']) {
@@ -1275,7 +1275,7 @@ Disk.prototype.read = function(sector, ibSector, fCompare)
 
 /**
  * write(sector, ibSector, b)
- * 
+ *
  * @this {Disk}
  * @param {Object} sector (returned from a previous seek)
  * @param {number} ibSector a byte index within the given sector
@@ -1286,7 +1286,7 @@ Disk.prototype.write = function(sector, ibSector, b)
 {
     if (this.fWriteProtected)
         return false;
-    
+
     if (DEBUG && !ibSector) this.messageDebugger("Disk.write(" + this.controller.id + ":" + this.drive.iDrive + "," + sector.iCylinder + ":" + sector.iHead + ":" + sector['sector'] + ")");
 
     if (ibSector < sector['length']) {
@@ -1299,7 +1299,7 @@ Disk.prototype.write = function(sector, ibSector, b)
              * Ensure every byte up to the specified byte is properly initialized.
              */
             for (var i = adw.length; i <= idw; i++) adw[i] = dwPattern;
-            
+
             if (!sector.cModify) {
                 sector.iModify = idw;
                 sector.cModify = 1;
@@ -1330,7 +1330,7 @@ Disk.prototype.write = function(sector, ibSector, b)
  *      [iCylinder, iHead, iSector, iModify, [...]]
  *
  * where [...] is an array of modified dword(s) in the corresponding sector.
- * 
+ *
  * @this {Disk}
  * @return {Array} of modified sectors
  */
@@ -1373,7 +1373,7 @@ Disk.prototype.save = function()
  *      [iCylinder, iHead, iSector, iModify, [...]]
  *
  * where [...] is an array of modified dword(s) in the corresponding sector.
- * 
+ *
  * @this {Disk}
  * @param {Array} deltas
  * @return {number} 0 if no changes applied, -1 if an error occurred, otherwise the number of sectors modified
@@ -1382,7 +1382,7 @@ Disk.prototype.restore = function(deltas)
 {
     /*
      * If deltas is undefined, that's not necessarily an error;  the controller may simply be (re)initializing
-     * itself (although neither controller should be calling restore() under those conditions anymore). 
+     * itself (although neither controller should be calling restore() under those conditions anymore).
      */
     var nChanges = 0;
     var sReason = "unsupported restore format";
@@ -1426,7 +1426,7 @@ Disk.prototype.restore = function(deltas)
              * Note the buried test for write-protection.  Yes, an invariant condition should be tested
              * outside the loop, not inside, but (a) it's a trivial test, (b) the test should never fail
              * because save() should never generate any mods for a write-protected disk, and (c) it
-             * centralizes all the failure conditions we're currently checking (which, admittedly, ain't much).  
+             * centralizes all the failure conditions we're currently checking (which, admittedly, ain't much).
              */
             if (iCylinder >= this.aDiskData.length || iHead >= this.aDiskData[iCylinder].length || iSector >= this.aDiskData[iCylinder][iHead].length) {
                 sReason = "sector " + iCylinder + ":" + iHead + ":" + iSector + " out of range (" + nChanges + " changes applied)";
@@ -1471,7 +1471,7 @@ Disk.prototype.restore = function(deltas)
  * messageDebugger(sMessage)
  *
  * This is a combination of the Debugger's messageEnabled(MESSAGE_DISK) and message() functions, for convenience.
- * 
+ *
  * @this {Disk}
  * @param {string} sMessage is any caller-defined message string
  */
diff --git a/my_modules/pcjs-client/lib/fdc.js b/my_modules/pcjs-client/lib/fdc.js
index d66dba83d..423a5f3ed 100644
--- a/my_modules/pcjs-client/lib/fdc.js
+++ b/my_modules/pcjs-client/lib/fdc.js
@@ -34,14 +34,14 @@
 "use strict";
 
 if (typeof module !== 'undefined') {
-    var str = require("../../shared/lib/strlib");
-    var web = require("../../shared/lib/weblib");
-    var DiskAPI = require("../../shared/lib/diskapi");
-    var Component = require("../../shared/lib/component");
-    var ChipSet = require("./chipset");
-    var Disk = require("./disk");
-    var Computer = require("./computer");
-    var State = require("./state");
+    var str         = require("../../shared/lib/strlib");
+    var web         = require("../../shared/lib/weblib");
+    var DiskAPI     = require("../../shared/lib/diskapi");
+    var Component   = require("../../shared/lib/component");
+    var ChipSet     = require("./chipset");
+    var Disk        = require("./disk");
+    var Computer    = require("./computer");
+    var State       = require("./state");
 }
 
 /*
@@ -738,6 +738,13 @@ FDC.prototype.initController = function(data)
     for (iDrive = 0; iDrive < this.aDrives.length; iDrive++) {
         var drive = this.aDrives[iDrive];
         if (drive === undefined) {
+            /*
+             * The first time each drive is initialized, obtain its type (from switches or CMOS) and the physical limits
+             * of the drive (ie, max tracks and max sectors/track).  As for max heads, initDrive() assumes that all drives
+             * have two heads, and in any case, there's no way to configure/specify a single-sided floppy drive.
+             *
+             * TODO: Provide a configuration option for single-sided drives, in case someone really wants to simulate that.
+             */
             drive = this.aDrives[iDrive] = {};
             drive.bType = this.chipset.getSWFloppyDriveType(iDrive);
             drive.nCylinders = 40;
@@ -823,7 +830,7 @@ FDC.prototype.initDrive = function(drive, iDrive, data)
         /*
          * Note that when no data is provided (eg, when the controller is being reinitialized), we now take
          * care to preserve any drive defaults that initController() already obtained for us, falling back to
-         * bare minimums only when all else has failed.
+         * bare minimums only when all else fails.
          */
         data[1] = [FDC.DEFAULT_DRIVE_NAME, drive.nCylinders || 40, drive.nHeads || data[3], drive.nSectors || 9, drive.cbSector || 512, data[1]];
     }
@@ -845,6 +852,18 @@ FDC.prototype.initDrive = function(drive, iDrive, data)
     drive.nSectors = data[i][3];            // sectors/track
     drive.cbSector = data[i][4];            // bytes/sector
     drive.fRemovable = data[i][5];
+    /*
+     * If we have current media parameters, restore them; otherwise, default to the drive's physical parameters.
+     */
+    if (drive.nDiskCylinders = data[i][6]) {
+        drive.nDiskHeads = data[i][7];
+        drive.nDiskSectors = data[i][8];
+    } else {
+        drive.nDiskCylinders = drive.nCylinders;
+        drive.nDiskHeads = drive.nHeads;
+        drive.nDiskSectors = drive.nSectors;
+
+    }
     i++;
 
     /*
@@ -888,11 +907,7 @@ FDC.prototype.initDrive = function(drive, iDrive, data)
     drive.nBytes = data[i++];
 
     /*
-     * The next group of properties are set by user requests to load/unload diskette images.
-     *
-     * NOTE: I now avoid reinitializing drive.disk in order to retain any previously mounted diskette across resets.
-     *
-     *    drive.disk = null;                // when a "disk" is "inserted" into the "drive", this is a Disk object
+     * We no longer reinitialize drive.disk, in order to retain previously mounted diskette across resets.
      */
 
     /*
@@ -971,7 +986,7 @@ FDC.prototype.saveDrive = function(drive)
     var i = 0;
     var data = [];
     data[i++] = drive.resCode;
-    data[i++] = [drive.name, drive.nCylinders, drive.nHeads, drive.nSectors, drive.cbSector, drive.fRemovable];
+    data[i++] = [drive.name, drive.nCylinders, drive.nHeads, drive.nSectors, drive.cbSector, drive.fRemovable, drive.nDiskCylinders, drive.nDiskHeads, drive.nDiskSectors];
     data[i++] = drive.bHead;
     /*
      * We used to store drive.nHeads in the next slot, but now we store bCylinderSeek,
@@ -1170,15 +1185,20 @@ FDC.prototype.loadDiskette = function(iDrive, sDisketteName, sDiskettePath, fAut
  */
 FDC.prototype.mountDiskette = function(drive, disk, sDisketteName, sDiskettePath)
 {
+    var aDiskInfo;
+
     drive.fBusy = false;
 
-    /*
-     * We shouldn't mount the diskette unless the drive is able to handle it; for example, DSDD (40-track)
-     * drives cannot read DSHD (80-track) diskettes.
-     */
-    if (disk && disk.aDiskData.length > drive.nCylinders) {
-        this.notice("Diskette \"" + sDisketteName + "\" too large for drive " + String.fromCharCode(0x41 + drive.iDrive));
-        disk = null;
+    if (disk) {
+        /*
+         * We shouldn't mount the diskette unless the drive is able to handle it; for example, DSDD (40-track)
+         * drives cannot read DSHD (80-track) diskettes.
+         */
+        aDiskInfo = disk.info();
+        if (disk && aDiskInfo[0] > drive.nCylinders || aDiskInfo[1] > drive.nHeads || aDiskInfo[2] > drive.nSectors) {
+            this.notice("Diskette \"" + sDisketteName + "\" too large for drive " + String.fromCharCode(0x41 + drive.iDrive));
+            disk = null;
+        }
     }
 
     if (disk) {
@@ -1205,6 +1225,13 @@ FDC.prototype.mountDiskette = function(drive, disk, sDisketteName, sDiskettePath
          * and will not match the drive mappings that DOS ultimately uses (ie, for drives beyond B:).
          */
         this.notice("Mounted diskette \"" + sDisketteName + "\" in drive " + String.fromCharCode(0x41 + drive.iDrive), drive.fAutoMount);
+
+        /*
+         * Update the drive's current media parameters to match the disk's.
+         */
+        drive.nDiskCylinders = aDiskInfo[0];
+        drive.nDiskHeads = aDiskInfo[1];
+        drive.nDiskSectors = aDiskInfo[2];
     }
 
     if (drive.fAutoMount) {
@@ -2141,8 +2168,8 @@ FDC.prototype.writeByte = function(drive, b)
 /**
  * advanceSector(drive)
  *
- * This increments the sector number; when the sector number reaches drive.nSectors on the current track, we
- * increment drive.bHead and reset drive.bSector, and when drive.bHead reaches drive.nHeads, we reset drive.bHead
+ * This increments the sector number; when the sector number reaches drive.nDiskSectors on the current track, we
+ * increment drive.bHead and reset drive.bSector, and when drive.bHead reaches drive.nDiskHeads, we reset drive.bHead
  * and increment drive.bCylinder.
  *
  * @this {FDC}
@@ -2150,13 +2177,13 @@ FDC.prototype.writeByte = function(drive, b)
  */
 FDC.prototype.advanceSector = function(drive)
 {
-    Component.assert(drive.bCylinder < drive.nCylinders);
+    Component.assert(drive.bCylinder < drive.nDiskCylinders);
     drive.bSector++;
     var bSectorStart = 1;
-    if (drive.bSector >= drive.nSectors + bSectorStart) {
+    if (drive.bSector >= drive.nDiskSectors + bSectorStart) {
         drive.bSector = bSectorStart;
         drive.bHead++;
-        if (drive.bHead >= drive.nHeads) {
+        if (drive.bHead >= drive.nDiskHeads) {
             drive.bHead = 0;
             drive.bCylinder++;
         }
diff --git a/my_modules/pcjs-client/lib/hdc.js b/my_modules/pcjs-client/lib/hdc.js
index a2dbc96ec..5d435cb90 100644
--- a/my_modules/pcjs-client/lib/hdc.js
+++ b/my_modules/pcjs-client/lib/hdc.js
@@ -34,13 +34,13 @@
 "use strict";
 
 if (typeof module !== 'undefined') {
-    var str = require("../../shared/lib/strlib");
-    var web = require("../../shared/lib/weblib");
-    var DiskAPI = require("../../shared/lib/diskapi");
-    var Component = require("../../shared/lib/component");
-    var ChipSet = require("./chipset");
-    var Disk = require("./disk");
-    var State = require("./state");
+    var str         = require("../../shared/lib/strlib");
+    var web         = require("../../shared/lib/weblib");
+    var DiskAPI     = require("../../shared/lib/diskapi");
+    var Component   = require("../../shared/lib/component");
+    var ChipSet     = require("./chipset");
+    var Disk        = require("./disk");
+    var State       = require("./state");
 }
 
 /**
@@ -145,7 +145,7 @@ HDC.aDriveTypes = [
      * so aDriveTypes must first be indexed by a controller index (this.iHDC).
      *
      * The following is a more complete description of the drive types supported by the MODEL_5170, where C is
-     * Cylinders, H is Heads, WP is Write Pre-Comp, and LZ is Landing Zone (in practice, we don't need WP or LZ).  
+     * Cylinders, H is Heads, WP is Write Pre-Comp, and LZ is Landing Zone (in practice, we don't need WP or LZ).
      *
      * Type    C    H   WP   LZ
      * ----  ---   --  ---  ---
@@ -457,7 +457,7 @@ HDC.BIOS = {
 };
 
 /*
- * NOTE: These are useful values for reference, but they're not actually used for anything at the moment. 
+ * NOTE: These are useful values for reference, but they're not actually used for anything at the moment.
  */
 HDC.BIOS.DISK_CMD = {
     RESET:          0x00,
@@ -865,7 +865,7 @@ HDC.prototype.initDrive = function(iDrive, drive, driveConfig, data, fReset)
     /*
      * The next group of properties are set by user requests to load/unload disk images.
      *
-     * NOTE: I now avoid reinitializing drive.disk in order to retain any previously mounted disk across resets.
+     * We no longer reinitialize drive.disk, in order to retain previously mounted disk across resets.
      */
     if (drive.disk === undefined) {
         drive.disk = null;
@@ -1235,7 +1235,7 @@ HDC.prototype.outXTCData = function(port, bOut, addrFrom)
     }
     if (this.regDataTotal >= cbCmd) {
         /*
-         * It's essential that XTC.STATUS.IOMODE be set here, at least after the final 8-byte HDC.XTC.DATA.CMD.INIT_DRIVE sequence.  
+         * It's essential that XTC.STATUS.IOMODE be set here, at least after the final 8-byte HDC.XTC.DATA.CMD.INIT_DRIVE sequence.
          */
         this.regStatus |= HDC.XTC.STATUS.IOMODE;
         this.regStatus &= ~HDC.XTC.STATUS.REQ;
@@ -1650,13 +1650,13 @@ HDC.prototype.outATCDrvHd = function(port, bOut, addrFrom)
      * of configured hard drives is something other than 2, using INT 0x13/AH=0x10.  This in turn calls the
      * BIOS "TST_RDY" function, which selects the drive in this register (see DRIVE_MASK), and then immediately
      * expects regStatus to reflect success or failure.
-     * 
+     *
      * We were always returning success, because no ATC command was actually issued, and so the user would
      * always get a spurious CMOS configuration error: "System Options Not Set-(Run SETUP)".
-     * 
+     *
      * So now we update regStatus here.  I'm not sure which status bits are normally set to indicate failure,
      * but it should be sufficient to set or clear the READY bit according to whether the drive exists or not.
-     * 
+     *
      * TODO: Dig into the ATC documentation some more, and determine what other situations, if any, regStatus
      * needs to be updated.
      */
diff --git a/my_modules/pcjs-client/lib/keyboard.js b/my_modules/pcjs-client/lib/keyboard.js
index 77c144b40..7a19f7410 100644
--- a/my_modules/pcjs-client/lib/keyboard.js
+++ b/my_modules/pcjs-client/lib/keyboard.js
@@ -34,12 +34,12 @@
 "use strict";
 
 if (typeof module !== 'undefined') {
-    var str = require("../../shared/lib/strlib");
-    var web = require("../../shared/lib/weblib");
-    var Component = require("../../shared/lib/component");
-    var ChipSet = require("./chipset");
-    var State = require("./state");
-    var CPU = require("./cpu");
+    var str         = require("../../shared/lib/strlib");
+    var web         = require("../../shared/lib/weblib");
+    var Component   = require("../../shared/lib/component");
+    var ChipSet     = require("./chipset");
+    var State       = require("./state");
+    var CPU         = require("./cpu");
 }
 
 /**
@@ -57,7 +57,7 @@ if (typeof module !== 'undefined') {
  *
  * Its main purpose is to receive binding requests for various keyboard events,
  * and to use those events to simulate the PC's keyboard hardware.
- * 
+ *
  * @constructor
  * @extends Component
  * @param {Object} parmsKbd
@@ -119,11 +119,11 @@ Keyboard.CMD.SETLEDS        = 0xED;
 Keyboard.CMDRES = {};
 Keyboard.CMDRES.OVERRUN     = 0x00;
 Keyboard.CMDRES.LOADTEST    = 0x65;     // this is an undocumented "LOAD MANUFACTURING TEST REQUEST" response code
-Keyboard.CMDRES.BATSUCCESS  = 0xAA;     // Basic Assurance Test (BAT) completed successfully 
+Keyboard.CMDRES.BATSUCCESS  = 0xAA;     // Basic Assurance Test (BAT) completed successfully
 Keyboard.CMDRES.ECHO        = 0xEE;
 Keyboard.CMDRES.BREAKPREFIX = 0xF0;
 Keyboard.CMDRES.ACK         = 0xFA;
-Keyboard.CMDRES.BATFAIL     = 0xFC;     // Basic Assurance Test (BAT) failed 
+Keyboard.CMDRES.BATFAIL     = 0xFC;     // Basic Assurance Test (BAT) failed
 Keyboard.CMDRES.DIAGFAIL    = 0xFD;
 Keyboard.CMDRES.RESEND      = 0xFE;
 
@@ -280,7 +280,7 @@ Keyboard.aButtonCodes = {
  * For example, Safari on iOS devices will not generate up/down events for shift keys, and for other keys,
  * the up/down events are usually generated after the actual press is complete, and in rapid succession,
  * which doesn't always give the simulation enough time to detect the key.
- * 
+ *
  * The other problem (which is more of a problem with keyboards like the C1P than any IBM keyboards) is
  * that the shift/modifier state for a character on the "source" keyboard may not match the shift/modifier
  * state for the same character on the "target" keyboard.  And since this code is inherited from C1Pjs,
@@ -424,7 +424,7 @@ Keyboard.aCharCodes[Keyboard.CHARCODE.CTRLALTDEL]=0x53 + (Keyboard.CHARCODE.CTRL
 
 /**
  * setBinding(sHTMLClass, sHTMLType, sBinding, control)
- * 
+ *
  * @this {Keyboard}
  * @param {string|null} sHTMLClass is the class of the HTML control (eg, "input", "output")
  * @param {string|null} sHTMLType is the type of the HTML control (eg, "button", "list", "text", "submit", "textarea", "canvas")
@@ -444,7 +444,7 @@ Keyboard.prototype.setBinding = function(sHTMLClass, sHTMLType, sBinding, contro
      *
      * However, it's also possible for the keyboard XML definition to define a control that serves
      * a similar purpose; eg:
-     * 
+     *
      *      Kbd
      *
      * The latter is purely experimental, while we work on finding ways to trigger the soft keyboard on
@@ -508,7 +508,7 @@ Keyboard.prototype.setBinding = function(sHTMLClass, sHTMLType, sBinding, contro
 
 /**
  * findBinding(bKey, t, fDown)
- * 
+ *
  * @this {Keyboard}
  * @param {number} bKey
  * @param {string} t is the type of control (eg, "button" or "key")
@@ -533,7 +533,7 @@ Keyboard.prototype.findBinding = function(bKey, t, fDown)
 
 /**
  * initBus(cmp, bus, cpu, dbg)
- * 
+ *
  * @this {Keyboard}
  * @param {Computer} cmp
  * @param {Bus} bus
@@ -551,7 +551,7 @@ Keyboard.prototype.initBus = function(cmp, bus, cpu, dbg)
 
 /**
  * setModel(nModel)
- * 
+ *
  * @this {Keyboard}
  * @param {number} nModel
  */
@@ -561,7 +561,7 @@ Keyboard.prototype.setModel = function(nModel)
 
 /**
  * setReady()
- * 
+ *
  * @this {Keyboard}
  */
 Keyboard.prototype.setReady = function()
@@ -574,7 +574,7 @@ Keyboard.prototype.setReady = function()
 
 /**
  * resetDevice()
- * 
+ *
  * @this {Keyboard}
  */
 Keyboard.prototype.resetDevice = function()
@@ -589,12 +589,12 @@ Keyboard.prototype.resetDevice = function()
 
 /**
  * setEnable(fData, fClock)
- * 
+ *
  * This is the ChipSet's primary interface for toggling keyboard "data" and "clock" lines.
  * For MODEL_5150 and MODEL_5160 machines, this function is called from the ChipSet's PPI_B
  * output handler.  For MODEL_5170 machines, this function is called when selected KBC.CMD
  * "data bytes" have been written.
- * 
+ *
  * @this {Keyboard}
  * @param {boolean} fData is true if the keyboard simulated data line should be enabled
  * @param {boolean} fClock is true if the keyboard's simulated clock line should be enabled
@@ -635,7 +635,7 @@ Keyboard.prototype.setEnable = function(fData, fClock)
  *
  * This is the ChipSet's primary interface for controlling "Model M" keyboards (ie, those used
  * with MODEL_5170 machines).  Commands are delivered through the ChipSet's 8042 Keyboard Controller.
- * 
+ *
  * @this {Keyboard}
  * @param {number} bCmd should be one of the Keyboard.CMD.* command codes (Model M keyboards only)
  * @return {number} response should be one of the Keyboard.CMDRES.* response codes, or -1 if unrecognized
@@ -656,7 +656,7 @@ Keyboard.prototype.sendCmd = function(bCmd)
 
 /**
  * readScanCode(fShift)
- * 
+ *
  * This is the ChipSet's interface for reading scan codes.
  *
  * @this {Keyboard}
@@ -676,9 +676,9 @@ Keyboard.prototype.readScanCode = function(fShift)
 
 /**
  * shiftScanCode(fFlush)
- * 
+ *
  * This is the ChipSet's interface to advance (or flush) scan codes.
- * 
+ *
  * @this {Keyboard}
  * @param {boolean} [fFlush] is true to completely flush the keyboard buffer
  */
@@ -736,7 +736,7 @@ Keyboard.prototype.powerUp = function(data, fRepower)
 
 /**
  * powerDown(fSave)
- * 
+ *
  * @this {Keyboard}
  * @param {boolean} fSave
  * @return {Object|boolean}
@@ -748,7 +748,7 @@ Keyboard.prototype.powerDown = function(fSave)
 
 /**
  * reset()
- * 
+ *
  * @this {Keyboard}
  */
 Keyboard.prototype.reset = function()
@@ -801,7 +801,7 @@ Keyboard.prototype.reset = function()
  * save()
  *
  * This implements save support for the Keyboard component.
- * 
+ *
  * @this {Keyboard}
  * @return {Object}
  */
@@ -816,7 +816,7 @@ Keyboard.prototype.save = function()
  * restore(data)
  *
  * This implements restore support for the Keyboard component.
- * 
+ *
  * @this {Keyboard}
  * @param {Object} data
  * @return {boolean} true if successful, false if failure
@@ -828,7 +828,7 @@ Keyboard.prototype.restore = function(data)
 
 /**
  * initState(data)
- * 
+ *
  * @this {Keyboard}
  * @param {Array} [data]
  * @return {boolean} true if successful, false if failure
@@ -844,7 +844,7 @@ Keyboard.prototype.initState = function(data)
 
 /**
  * saveState()
- * 
+ *
  * @this {Keyboard}
  * @return {Array}
  */
@@ -859,7 +859,7 @@ Keyboard.prototype.saveState = function()
 
 /**
  * setSoftKeyState(control, f)
- * 
+ *
  * @this {Keyboard}
  * @param {Object} control is an HTML control DOM object
  * @param {boolean} f is true if the key represented by e should be "on", false if "off"
@@ -877,7 +877,7 @@ Keyboard.prototype.setSoftKeyState = function(control, f)
  *
  * Just as 0xAA is a special scan code response to a software reset, 0xFF is a special scan code response
  * to an internal buffer overrun.  I try to simulate both.
- * 
+ *
  * @this {Keyboard}
  * @param {number} bScan
  * @param {boolean} [fRepeat]
@@ -917,7 +917,7 @@ Keyboard.prototype.addScanCode = function(bScan, fRepeat)
 
 /**
  * calcReleaseDelay(fRepeat)
- * 
+ *
  * Attempts to scale our default "release" delay appropriately for the current CPU speed.
  *
  * Note that if the effective CPU speed exceeds 16Mhz, it becomes very difficult to rely on timer-driven key events
@@ -947,7 +947,7 @@ Keyboard.prototype.calcReleaseDelay = function(fRepeat)
 
 /**
  * autoClear(notCharCode)
- * 
+ *
  * @this {Keyboard}
  * @param {number} [notCharCode]
  */
@@ -963,7 +963,7 @@ Keyboard.prototype.autoClear = function(notCharCode)
 
 /**
  * injectKeys(sKeyCodes, msDelay)
- * 
+ *
  * @this {Keyboard}
  * @param {string} sKeyCodes
  * @param {number|undefined} [msDelay] is an optional injection delay (default is msInjectDelay)
@@ -977,7 +977,7 @@ Keyboard.prototype.injectKeys = function(sKeyCodes, msDelay)
 
 /**
  * injectKeysFromBuffer(msDelay)
- * 
+ *
  * @this {Keyboard}
  * @param {number} msDelay is the delay between injected keys
  */
@@ -1004,7 +1004,7 @@ Keyboard.prototype.injectKeysFromBuffer = function(msDelay)
 
 /**
  * keyEvent(event, fDown)
- * 
+ *
  * @this {Keyboard}
  * @param {Object} event
  * @param {boolean} fDown is true if called for a keyDown event, false if called for a keyUp event
@@ -1070,7 +1070,7 @@ Keyboard.prototype.keyEvent = function(event, fDown)
          * which also generates "down" and "up" events (LOTS of "down" events for that matter),
          * but no "press" event.  The C1P has no TAB key, so it's safe to completely ignore,
          * hence the code below, but a PC does, so I need to simulate it.
-         * 
+         *
          *      fPass = fAutoClear = false;
          *
          * I don't get keyPress events for ESC (why?) and I never want the browser to act on DELETE
@@ -1117,10 +1117,10 @@ Keyboard.prototype.keyEvent = function(event, fDown)
              * "up" events, so that keys will repeat immediately when released/pressed repeatedly (most
              * noticeable with the Enter key), or set fAutoClear to false to ensure that polling apps have
              * enough time to see every key press.
-             * 
+             *
              * I've decided that the former is more important than the latter, so if polling apps are still
              * missing keystrokes, then perhaps nCyclesThreshold needs to be supplemented in some way.
-             * 
+             *
              *      fAutoClear = false;
              */
         }
@@ -1161,7 +1161,7 @@ Keyboard.prototype.keyEvent = function(event, fDown)
  *
  * We've stopped relying on keyPress for keyboard emulation purposes, but it's still handy to hook and monitor
  * when debugging.
- * 
+ *
  * @this {Keyboard}
  * @param {Object} event
  * @return {boolean} true to pass the event along, false to consume it
@@ -1184,12 +1184,12 @@ Keyboard.prototype.keyPress = function(event)
         /*
          * Unlike Safari and Chrome, Firefox doesn't seem to honor our "consume" request for the "down" DELETE keyEvent,
          * so we must ALSO check for the DELETE key here, and again "consume" it.  Ditto for TAB.
-         * 
+         *
          * In fact, this is just one example of a larger Firefox problem (see https://bugzilla.mozilla.org/show_bug.cgi?id=501496).
          * Basically, Firefox is not honoring our consumption of keyDown events, and generates keyPress events anyway.
          * This causes us grief for various CTRL and ALT combinations, resulting in duplicate key presses.
          * So, I'm going to try to fix this below, by setting fPass to true if either of those modifier keys is currently down;
-         * if they're not, then we'll continue with the original code that sets fPass based on the return value from keyPressSimulate(). 
+         * if they're not, then we'll continue with the original code that sets fPass based on the return value from keyPressSimulate().
          */
         fPass = false;
     } else {
@@ -1210,7 +1210,7 @@ Keyboard.prototype.keyPress = function(event)
 
 /**
  * keyPressSimulate(charCode)
- * 
+ *
  * @this {Keyboard}
  * @param {number} charCode
  * @param {boolean} [fQuickRelease] is true to simulate the press and release immediately
@@ -1232,10 +1232,10 @@ Keyboard.prototype.keyPressSimulate = function(charCode, fQuickRelease)
          * and execute a LOT of instructions between delivery of the keyPress event and the "keyTimeout"
          * event, and since JavaScript events (including timeouts) are delivered synchronously, it might
          * take too long for the "keyTimeout" event to arrive.
-         * 
+         *
          * Why don't we ALWAYS do this?  Because at normal CPU speeds, we want to faithfully simulate how
          * long a key is held, so that features like auto-repeat work properly.
-         * 
+         *
          * TODO: The above is probably more true for C1Pjs (where some of this code came from) than PCjs,
          * so revisit these assumptions.  The fact that I had to add the fQuickRelease parameter suggests
          * that it's time to review/overhaul this code.
@@ -1265,7 +1265,7 @@ Keyboard.prototype.keyPressSimulate = function(charCode, fQuickRelease)
 
 /**
  * keyEventSimulate(charCode, fDown, simCode)
- * 
+ *
  * @this {Keyboard}
  * @param {number} charCode
  * @param {boolean} fDown
@@ -1353,7 +1353,7 @@ Keyboard.prototype.keyEventSimulate = function(charCode, fDown, simCode)
  * messageDebugger(sMessage, fPort)
  *
  * This is a combination of the Debugger's messageEnabled(MESSAGE_KBD) and message() functions, for convenience.
- * 
+ *
  * @this {Keyboard}
  * @param {string} sMessage is any caller-defined message string
  * @param {boolean} [fPort] is true if the message is port-related, false if not
diff --git a/my_modules/pcjs-client/lib/mem.js b/my_modules/pcjs-client/lib/mem.js
index 638800d51..b56b33ebf 100644
--- a/my_modules/pcjs-client/lib/mem.js
+++ b/my_modules/pcjs-client/lib/mem.js
@@ -50,8 +50,8 @@
 "use strict";
 
 if (typeof module !== 'undefined') {
-    var str = require("../../shared/lib/strlib");
-    var Component = require("../../shared/lib/component");
+    var str         = require("../../shared/lib/strlib");
+    var Component   = require("../../shared/lib/component");
 }
 /**
  * @class DataView
@@ -70,7 +70,7 @@ if (typeof module !== 'undefined') {
  * block-granular starting address and an address range equal to bus.blockSize; however,
  * the size of any given Memory object's underlying buffer can be either zero or bus.blockSize;
  * memory read/write functions for empty (buffer-less) blocks are mapped to readNone/writeNone.
- * 
+ *
  * The Bus allocates empty blocks for the entire address space during initialization, so that
  * any reads/writes to undefined addresses will have no effect.  Later, the ROM and RAM
  * components will ask the Bus to allocate memory for specific ranges, and the Bus will allocate
@@ -90,7 +90,7 @@ if (typeof module !== 'undefined') {
  * consumption.  Using TYPEDARRAYS is probably best, although not all JavaScript implementations
  * support them (IE9 is probably the only real outlier: it lacks typed arrays but otherwise has
  * all the necessary HTML5 support).
- * 
+ *
  * @constructor
  * @param {number} addr of block (must be some multiple of bus.blockSize)
  * @param {number} [size] of block's buffer in bytes (0 for none); must be a multiple of 4
@@ -107,13 +107,13 @@ function Memory(addr, size, fReadOnly, controller) {
 
     /*
      * For empty memory blocks, all we need to do is ensure all access functions
-     * are mapped to "none" handlers. 
+     * are mapped to "none" handlers.
      */
     if (!size) {
         this.setAccess();
         return;
     }
-    
+
     /*
      * When a controller is specified, the controller must provide a buffer,
      * via getMemoryBuffer(), and memory access functions, via getMemoryAccess().
@@ -126,7 +126,7 @@ function Memory(addr, size, fReadOnly, controller) {
         this.setAccess(controller.getMemoryAccess());
         return;
     }
-    
+
     /*
      * This is the normal case: allocate a buffer that provides 8 bits of data per address;
      * no controller is required because our default memory access functions (see afnMemory)
@@ -161,7 +161,7 @@ Memory.prototype = {
     constructor: Memory,
     /**
      * readNone(off)
-     * 
+     *
      * @this {Memory}
      * @param {number} off
      * @return {number}
@@ -174,7 +174,7 @@ Memory.prototype = {
     },
     /**
      * writeNone(off, v)
-     * 
+     *
      * @this {Memory}
      * @param {number} off
      * @param {number} v (could be either a byte or word value, since we use the same handler for both kinds of accesses)
@@ -186,7 +186,7 @@ Memory.prototype = {
     },
     /**
      * readByteTypedArray(off)
-     * 
+     *
      * @this {Memory}
      * @param {number} off
      * @return {number}
@@ -197,7 +197,7 @@ Memory.prototype = {
     },
     /**
      * readWordTypedArray(off)
-     * 
+     *
      * @this {Memory}
      * @param {number} off
      * @return {number}
@@ -208,7 +208,7 @@ Memory.prototype = {
     },
     /**
      * writeByteTypedArray(off, b)
-     * 
+     *
      * @this {Memory}
      * @param {number} off
      * @param {number} b
@@ -220,7 +220,7 @@ Memory.prototype = {
     },
     /**
      * writeWordTypedArray(off, w)
-     * 
+     *
      * @this {Memory}
      * @param {number} off
      * @param {number} w
@@ -232,7 +232,7 @@ Memory.prototype = {
     },
     /**
      * readByteMemory(off)
-     * 
+     *
      * @this {Memory}
      * @param {number} off
      * @return {number}
@@ -246,7 +246,7 @@ Memory.prototype = {
     },
     /**
      * readWordMemory(off)
-     * 
+     *
      * @this {Memory}
      * @param {number} off
      * @return {number}
@@ -269,7 +269,7 @@ Memory.prototype = {
     },
     /**
      * writeByteMemory(off, b)
-     * 
+     *
      * @this {Memory}
      * @param {number} off
      * @param {number} b
@@ -287,7 +287,7 @@ Memory.prototype = {
     },
     /**
      * writeWordMemory(off, w)
-     * 
+     *
      * @this {Memory}
      * @param {number} off
      * @param {number} w
@@ -312,7 +312,7 @@ Memory.prototype = {
     },
     /**
      * readByteVerify(off)
-     * 
+     *
      * @this {Memory}
      * @param {number} off
      * @return {number}
@@ -323,7 +323,7 @@ Memory.prototype = {
     },
     /**
      * readWordVerify(off)
-     * 
+     *
      * @this {Memory}
      * @param {number} off
      * @return {number}
@@ -336,7 +336,7 @@ Memory.prototype = {
     },
     /**
      * writeByteVerify(off, b)
-     * 
+     *
      * @this {Memory}
      * @param {number} off
      * @param {number} b
@@ -347,7 +347,7 @@ Memory.prototype = {
     },
     /**
      * writeWordVerify(off, w)
-     * 
+     *
      * @this {Memory}
      * @param {number} off
      * @param {number} w
@@ -366,7 +366,7 @@ Memory.prototype = {
      *
      * Memory blocks with custom memory controllers do NOT save their contents;
      * that's the responsibility of the controller component.
-     * 
+     *
      * @this {Memory}
      * @return {Array|Int32Array|null}
      */
@@ -389,7 +389,7 @@ Memory.prototype = {
              * but we can't be sure of the "endianness" of an Int32Array -- which would be OK if the array
              * was always saved/restored on the same machine, but there's no guarantee of that, either.
              * So we use getInt32() and require little-endian values.
-             * 
+             *
              * Moreover, an Int32Array isn't treated by JSON.stringify() and JSON.parse() exactly like
              * a normal array; it's serialized as an Object rather than an Array, so it lacks a "length"
              * property and causes problems for State.store() and State.parse().
@@ -411,7 +411,7 @@ Memory.prototype = {
      * used by Bus.restoreMemory(), which is called by X86CPU.restore(), after all other
      * components have been restored and thus all Memory blocks have been allocated
      * by their respective components.
-     * 
+     *
      * @this {Memory}
      * @param {Array|null} adw
      * @return {boolean} true if successful, false if block size mismatch
@@ -445,7 +445,7 @@ Memory.prototype = {
     },
     /**
      * setAccess(afn)
-     * 
+     *
      * @this {Memory}
      * @param {Array.} [afn]
      * @param {boolean} [fDirect]
@@ -458,7 +458,7 @@ Memory.prototype = {
     },
     /**
      * setReadAccess(afn, fDirect)
-     * 
+     *
      * @this {Memory}
      * @param {Array.} afn
      * @param {boolean} [fDirect]
@@ -473,7 +473,7 @@ Memory.prototype = {
     },
     /**
      * setWriteAccess(afn, fDirect)
-     * 
+     *
      * @this {Memory}
      * @param {Array.} afn
      * @param {boolean} [fDirect]
@@ -488,7 +488,7 @@ Memory.prototype = {
     },
     /**
      * resetReadAccess()
-     * 
+     *
      * @this {Memory}
      */
     resetReadAccess: function() {
@@ -497,7 +497,7 @@ Memory.prototype = {
     },
     /**
      * resetWriteAccess()
-     * 
+     *
      * @this {Memory}
      */
     resetWriteAccess: function() {
@@ -506,7 +506,7 @@ Memory.prototype = {
     },
     /**
      * setDebugInfo(cpu, dbg, addr, size)
-     * 
+     *
      * @this {Memory}
      * @param {X86CPU|Component} cpu
      * @param {Debugger|Component} dbg
@@ -524,7 +524,7 @@ Memory.prototype = {
     },
     /**
      * addBreakpoint(off, fWrite)
-     * 
+     *
      * @this {Memory}
      * @param {number} off
      * @param {boolean} fWrite
@@ -547,7 +547,7 @@ Memory.prototype = {
     },
     /**
      * removeBreakpoint(off, fWrite)
-     * 
+     *
      * @this {Memory}
      * @param {number} off
      * @param {boolean} fWrite
diff --git a/my_modules/pcjs-client/lib/mouse.js b/my_modules/pcjs-client/lib/mouse.js
index 3dac0db5c..6561e3154 100644
--- a/my_modules/pcjs-client/lib/mouse.js
+++ b/my_modules/pcjs-client/lib/mouse.js
@@ -34,11 +34,11 @@
 "use strict";
 
 if (typeof module !== 'undefined') {
-    var str = require("../../shared/lib/strlib");
-    var web = require("../../shared/lib/weblib");
-    var Component = require("../../shared/lib/component");
-    var SerialPort = require("./serial");
-    var State = require("./state");
+    var str         = require("../../shared/lib/strlib");
+    var web         = require("../../shared/lib/weblib");
+    var Component   = require("../../shared/lib/component");
+    var SerialPort  = require("./serial");
+    var State       = require("./state");
 }
 
 /**
@@ -64,7 +64,7 @@ if (typeof module !== 'undefined') {
  * TODO: Just out of curiosity, verify that the Microsoft Bus Mouse used ports 0x23D and 0x23F,
  * because I saw Windows v1.01 probing those ports immediately prior to probing COM2 (and then COM1)
  * for a serial mouse.
- * 
+ *
  * @constructor
  * @extends Component
  * @param {Object} parmsMouse
@@ -83,14 +83,14 @@ function Mouse(parmsMouse) {
 
 /*
  * From http://paulbourke.net/dataformats/serialmouse:
- * 
+ *
  *      The old MicroSoft serial mouse, while no longer in general use, can be employed to provide a low cost input device,
  *      for example, coupling the internal mechanism to other moving objects. The serial protocol for the mouse is:
  *
  *          1200 baud, 7 bit, 1 stop bit, no parity.
  *
  *      The pinout of the connector follows the standard serial interface, as shown below:
- *      
+ *
  *          Pin     Abbr    Description
  *          1       DCD     Data Carrier Detect
  *          2       RD      Receive Data            [serial data from mouse to host]
@@ -101,7 +101,7 @@ function Mouse(parmsMouse) {
  *          7       RTS     Request To Send         [used to provide positive voltage to mouse]
  *          8       CTS     Clear To Send
  *          9       RI      Ring
- *          
+ *
  *      Every time the mouse changes state (moved or button pressed) a three byte "packet" is sent to the serial interface.
  *      For reasons known only to the engineers, the data is arranged as follows, most notably the two high order bits for the
  *      x and y coordinates share the first byte with the button status.
@@ -110,16 +110,16 @@ function Mouse(parmsMouse) {
  *          1st byte    1   LB  RB  Y7  Y6  X7  X6
  *          2nd byte    0   X5  X4  X3  X2  X1  X0
  *          3rd byte    0   Y5  Y4  Y3  Y2  Y1  Y0
- *          
+ *
  *      where:
- *      
+ *
  *          LB is the state of the left button, 1 = pressed, 0 = released.
  *          RB is the state of the right button, 1 = pressed, 0 = released
  *          X0-7 is movement of the mouse in the X direction since the last packet. Positive movement is toward the right.
  *          Y0-7 is movement of the mouse in the Y direction since the last packet. Positive movement is back, toward the user.
- *          
+ *
  * From http://www.kryslix.com/nsfaq/Q.12.html:
- * 
+ *
  *      The Microsoft serial mouse is the most popular 2-button mouse. It is supported by all major operating systems.
  *      The maximum tracking rate for a Microsoft mouse is 40 reports/second * 127 counts per report, in other words, 5080 counts
  *      per second. The most common range for mice is is 100 to 400 CPI (counts per inch) but can be up to 1000 CPI. A 100 CPI mouse
@@ -141,12 +141,12 @@ function Mouse(parmsMouse) {
  *      (0x4D, ASCII 'M').
  *
  *      Serial data parameters: 1200bps, 7 data bits, 1 stop bit
- *      
+ *
  *      Data is sent in 3 byte packets for each event (a button is pressed or released, or the mouse moves):
- *      
+ *
  *                  D7  D6  D5  D4  D3  D2  D1  D0
  *          Byte 1  X   1   LB  RB  Y7  Y6  X7  X6
- *          Byte 2  X   0   X5  X4  X3  X2  X1  X0      
+ *          Byte 2  X   0   X5  X4  X3  X2  X1  X0
  *          Byte 3  X   0   Y5  Y4  Y3  Y2  Y1  Y0
  *
  *      LB is the state of the left button (1 means down).
@@ -161,7 +161,7 @@ Component.subclass(Component, Mouse);
 
 /**
  * initBus(cmp, bus, cpu, dbg)
- * 
+ *
  * @this {Mouse}
  * @param {Computer} cmp
  * @param {Bus} bus
@@ -180,7 +180,7 @@ Mouse.prototype.initBus = function(cmp, bus, cpu, dbg) {
 
 /**
  * isActive()
- * 
+ *
  * @this {Mouse}
  * @return {boolean} true if active, false if not
  */
@@ -214,10 +214,10 @@ Mouse.prototype.powerUp = function(data, fRepower) {
                          * on the adapter's state, which is why I envisioned a subsequent syncMouse() call.  And you would want
                          * to do that as a separate call, not as part of attachMouse(), because componentAdapter isn't
                          * set until attachMouse() returns.
-                         * 
+                         *
                          * However, syncMouse() seems unnecessary, given that SerialPort initializes its MCR to an "inactive"
                          * state, and even when restoring a previous state, if we've done our job properly, both SerialPort and Mouse
-                         * should be restored in sync, making any explicit attempt at sync'ing unnecessary (or so I hope). 
+                         * should be restored in sync, making any explicit attempt at sync'ing unnecessary (or so I hope).
                          */
                         // this.componentAdapter.syncMouse();
                         break;
@@ -242,7 +242,7 @@ Mouse.prototype.powerUp = function(data, fRepower) {
 
 /**
  * powerDown(fSave)
- * 
+ *
  * @this {Mouse}
  * @param {boolean} fSave
  * @return {Object|boolean}
@@ -253,7 +253,7 @@ Mouse.prototype.powerDown = function(fSave) {
 
 /**
  * reset()
- * 
+ *
  * @this {Mouse}
  */
 Mouse.prototype.reset = function() {
@@ -264,7 +264,7 @@ Mouse.prototype.reset = function() {
  * save()
  *
  * This implements save support for the Mouse component.
- * 
+ *
  * @this {Mouse}
  * @return {Object}
  */
@@ -278,7 +278,7 @@ Mouse.prototype.save = function() {
  * restore(data)
  *
  * This implements restore support for the Mouse component.
- * 
+ *
  * @this {Mouse}
  * @param {Object} data
  * @return {boolean} true if successful, false if failure
@@ -289,7 +289,7 @@ Mouse.prototype.restore = function(data) {
 
 /**
  * initState(data)
- * 
+ *
  * @this {Mouse}
  * @param {Array} [data]
  * @return {boolean} true if successful, false if failure
@@ -310,7 +310,7 @@ Mouse.prototype.initState = function(data) {
 
 /**
  * saveState()
- * 
+ *
  * @this {Mouse}
  * @return {Array}
  */
@@ -333,7 +333,7 @@ Mouse.prototype.saveState = function() {
  *
  * NOTE: addEventListener() wasn't supported in IE until IE9, but that's OK, because IE9 is the
  * oldest IE we support anyway (since older versions of IE lacked complete HTML5/canvas support).
- * 
+ *
  * @this {Mouse}
  * @param {Object} control from the HTML DOM (eg, the canvas for the simulated screen)
  */
@@ -365,13 +365,13 @@ Mouse.prototype.captureMouse = function(control) {
             this.fCaptured = true;
         }
         /*
-         * None of these tricks seemed to work for IE10, so I'm giving up hiding the browser's mouse pointer in IE for now.  
+         * None of these tricks seemed to work for IE10, so I'm giving up hiding the browser's mouse pointer in IE for now.
          *
          *      control['style']['cursor'] = "url('data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAAZdEVYdFNvZnR3YXJlAFBhaW50Lk5FVCB2My41LjbQg61aAAAADUlEQVQYV2P4//8/IwAI/QL/+TZZdwAAAABJRU5ErkJggg=='), url('/versions/images/current/blank.cur'), none";
-         *      
+         *
          * Setting the cursor style to "none" may not be a standard, but it works in Safari, Firefox and Chrome, so that's pretty
          * good for a non-standard!
-         * 
+         *
          * TODO: The reference to '/versions/images/current/blank.cur' is also problematic for anyone who might want
          * to run this app from a different server, so think about that as well.
          */
@@ -385,7 +385,7 @@ Mouse.prototype.captureMouse = function(control) {
  * TODO: Use removeEventListener() if fCaptured, to clean up our handlers; since I'm currently using
  * anonymous functions, and since I'm not seeing any compelling reason to remove the handlers once they've
  * been established, it's less code to leave them in place.
- * 
+ *
  * @this {Mouse}
  * @param {Object} control from the HTML DOM
  */
@@ -408,7 +408,7 @@ Mouse.prototype.releaseMouse = function(control) {
  * but I don't think they're available in all browsers.  screenX and screenY would work as well.
  *
  * Anyway, all I care about are deltas.  For now.
- * 
+ *
  * @this {Mouse}
  * @param {Object} event object from a 'mousemove' event (specifically, a MouseEvent object)
  */
@@ -430,7 +430,7 @@ Mouse.prototype.moveMouse = function(event) {
 
 /**
  * clickMouse(iButton, fDown)
- * 
+ *
  * @this {Mouse}
  * @param {number} iButton is 0 for fButton1 (the LEFT button), 2 for fButton2 (the RIGHT button)
  * @param {boolean} fDown
@@ -470,7 +470,7 @@ Mouse.prototype.clickMouse = function(iButton, fDown) {
  *      Byte 1  X   1   LB  RB  Y7  Y6  X7  X6
  *      Byte 2  X   0   X5  X4  X3  X2  X1  X0
  *      Byte 3  X   0   Y5  Y4  Y3  Y2  Y1  Y0
- * 
+ *
  * @this {Mouse}
  * @param {string|null} [sDiag] diagnostic message
  * @param {number} [xDiag] original x-coordinate (optional; for diagnostic use only)
@@ -499,7 +499,7 @@ Mouse.prototype.sendPacket = function(sDiag, xDiag, yDiag) {
  * sitting in the RBR), and then writes 0x0B to the MCR (DTR on, RTS on).  This last step is consistent with making
  * the mouse "active", but it is NOT consistent with "toggling DTR", so I conclude that a reset is ALSO sufficient
  * for sending the identification byte.  Right or wrong, this gets the ball rolling for Windows v1.01.
- * 
+ *
  * @this {Mouse}
  * @param {number} bMCR
  */
@@ -532,7 +532,7 @@ Mouse.prototype.notifyMCR = function(bMCR) {
              * At the very least, Windows will have (re)masked the serial port's IRQ, so what does it matter?  Not much,
              * I just would have preferred that fActive properly reflect whether we should continue dispatching mouse
              * events, displaying MESSAGE_MOUSE messages, etc.
-             * 
+             *
              * We could ask the ChipSet component to notify the SerialPort component whenever its IRQ is masked/unmasked,
              * and then have the SerialPort pass that notification on to us, but I'm assuming that in the real world,
              * a mouse device that's still powered may still send event data to the serial port, and if there was software
@@ -550,7 +550,7 @@ Mouse.prototype.notifyMCR = function(bMCR) {
  * messageDebugger(sMessage)
  *
  * This is a combination of the Debugger's messageEnabled(MESSAGE_MOUSE) and message() functions, for convenience.
- * 
+ *
  * @this {Mouse}
  * @param {string} sMessage is any caller-defined message string
  */
diff --git a/my_modules/pcjs-client/lib/panel.js b/my_modules/pcjs-client/lib/panel.js
index 6297eb620..689e0278a 100644
--- a/my_modules/pcjs-client/lib/panel.js
+++ b/my_modules/pcjs-client/lib/panel.js
@@ -4,7 +4,7 @@
  * @version 1.0
  * @suppress {missingProperties}
  * Created 2012-Jun-19
- * 
+ *
  * Copyright © 2012-2014 Jeff Parsons 
  *
  * This file is part of PCjs, which is part of the JavaScript Machines Project (aka JSMachines)
@@ -34,15 +34,15 @@
 "use strict";
 
 if (typeof module !== 'undefined') {
-    var web = require("../../shared/lib/weblib");
-    var Component = require("../../shared/lib/component");
+    var web         = require("../../shared/lib/weblib");
+    var Component   = require("../../shared/lib/component");
 }
 
 /**
  * Panel(parmsPanel)
  *
  * The Panel component has no required (parmsPanel) properties.
- * 
+ *
  * @constructor
  * @extends Component
  * @param {Object} parmsPanel
@@ -55,7 +55,7 @@ Component.subclass(Component, Panel);
 
 /**
  * setBinding(sHTMLClass, sHTMLType, sBinding, control)
- * 
+ *
  * The Panel doesn't have any bindings of its own; it passes along all binding requests to
  * the Computer, CPU, Keyboard and Debugger components. The order shouldn't matter, since any
  * component that doesn't recognize the specified binding should simply ignore it.
@@ -95,7 +95,7 @@ Panel.prototype.initBus = function(cmp, bus, cpu, dbg)
 
 /**
  * powerUp(data, fRepower)
- * 
+ *
  * @this {Panel}
  * @param {Object|null} data
  * @param {boolean} [fRepower]
@@ -111,7 +111,7 @@ Panel.prototype.powerUp = function(data, fRepower)
 
 /**
  * powerDown(fSave)
- * 
+ *
  * @this {Panel}
  * @param {boolean} fSave
  * @return {Object|boolean}
@@ -123,19 +123,19 @@ Panel.prototype.powerDown = function(fSave)
 
 /**
  * Panel.init()
- *  
+ *
  * This function operates on every element (e) of class "panel", and initializes
  * all the necessary HTML to construct the Panel module(s) as spec'ed.
  *
  * Note that each element (e) of class "panel" is expected to have a "data-value"
  * attribute containing the same JSON-encoded parameters that the Panel constructor
  * expects.
- *  
+ *
  * NOTE: Unlike most other component init() functions, this one is designed to be
  * called multiple times: once at load time, so that we can binding our print()
  * function to the panel's output control ASAP, and again when the Computer component
  * is verifying that all components are ready and invoking their setPower() functions.
- *  
+ *
  * Our setPower() method gives us a second opportunity to notify any components that
  * that might care (eg, CPU, Keyboard, and Debugger) that we have some controls they
  * might want to use.
diff --git a/my_modules/pcjs-client/lib/ram.js b/my_modules/pcjs-client/lib/ram.js
index 785a7b27c..f6c9dcd09 100644
--- a/my_modules/pcjs-client/lib/ram.js
+++ b/my_modules/pcjs-client/lib/ram.js
@@ -34,9 +34,9 @@
 "use strict";
 
 if (typeof module !== 'undefined') {
-    var web = require("../../shared/lib/weblib");
-    var Component = require("../../shared/lib/component");
-    var ROM = require("./rom");
+    var web         = require("../../shared/lib/weblib");
+    var Component   = require("../../shared/lib/component");
+    var ROM         = require("./rom");
 }
 
 /**
@@ -49,7 +49,7 @@ if (typeof module !== 'undefined') {
  *
  * NOTE: We make a note of the specified size, but no memory is initially allocated
  * for the RAM until the Computer component calls setPower().
- * 
+ *
  * @constructor
  * @extends Component
  * @param {Object} parmsRAM
@@ -69,7 +69,7 @@ Component.subclass(Component, RAM);
 
 /**
  * initBus(cmp, bus, cpu, dbg)
- * 
+ *
  * @this {RAM}
  * @param {Computer} cmp
  * @param {Bus} bus
@@ -113,7 +113,7 @@ RAM.prototype.powerUp = function(data, fRepower) {
 
 /**
  * powerDown(fSave)
- * 
+ *
  * @this {RAM}
  * @param {boolean} fSave
  * @return {Object|boolean}
@@ -146,7 +146,7 @@ RAM.prototype.powerDown = function(fSave) {
  * object was not given a specific size (see fInstalled).  If there are other RAM objects in the system,
  * they must necessarily specify a non-conflicting, non-zero start address, in which case their sizeRAM
  * value will never be affected by the ChipSet settings.
- * 
+ *
  * @this {RAM}
  */
 RAM.prototype.reset = function() {
diff --git a/my_modules/pcjs-client/lib/rom.js b/my_modules/pcjs-client/lib/rom.js
index 1717bdfc1..2d055adcb 100644
--- a/my_modules/pcjs-client/lib/rom.js
+++ b/my_modules/pcjs-client/lib/rom.js
@@ -34,10 +34,10 @@
 "use strict";
 
 if (typeof module !== 'undefined') {
-    var str = require("../../shared/lib/strlib");
-    var web = require("../../shared/lib/weblib");
-    var DumpAPI = require("../../shared/lib/dumpapi");
-    var Component = require("../../shared/lib/component");
+    var str         = require("../../shared/lib/strlib");
+    var web         = require("../../shared/lib/weblib");
+    var DumpAPI     = require("../../shared/lib/dumpapi");
+    var Component   = require("../../shared/lib/component");
 }
 
 /**
@@ -56,7 +56,7 @@ if (typeof module !== 'undefined') {
  *
  * Also, while the size parameter may seem redundant, I consider it useful to confirm that the ROM you received
  * is the ROM you expected.
- * 
+ *
  * @constructor
  * @extends Component
  * @param {Object} parmsROM
@@ -109,11 +109,11 @@ ROM.BIOS.RESET_FLAG_WARMBOOT = 0x1234;  // value stored at ROM.BIOS.RESET_FLAG t
 /*
  * NOTE: There's currently no need for this component to have a reset() function, since
  * once the ROM data is loaded, it can't be changed, so there's nothing to reinitialize.
- * 
+ *
  * OK, well, I take that back, because the Debugger, if installed, has the ability to modify
  * ROM contents, so in that case, having a reset() function that restores the original ROM data
  * might be useful; then again, it might not, depending on what you're trying to debug.
- * 
+ *
  * If we do add reset(), then we'll want to change copyROM() to hang onto the original
  * ROM data; currently, we release it after copying it into the read-only memory allocated
  * via bus.addMemory().
@@ -121,7 +121,7 @@ ROM.BIOS.RESET_FLAG_WARMBOOT = 0x1234;  // value stored at ROM.BIOS.RESET_FLAG t
 
 /**
  * initBus(cmp, bus, cpu, dbg)
- * 
+ *
  * @this {ROM}
  * @param {Computer} cmp
  * @param {Bus} bus
@@ -166,7 +166,7 @@ ROM.prototype.powerUp = function(data, fRepower)
  * this function.  But it doesn't hurt anything, and maybe we'll use our state to save something
  * useful down the road, like user-defined symbols (ie, symbols that the Debugger may have
  * created, above and beyond those symbols we automatically loaded, if any, along with the ROM).
- * 
+ *
  * @this {ROM}
  * @param {boolean} fSave
  * @return {Object|boolean}
@@ -178,7 +178,7 @@ ROM.prototype.powerDown = function(fSave)
 
 /**
  * onLoadROM(sROMFile, sROMData, nErrorCode)
- * 
+ *
  * @this {ROM}
  * @param {string} sROMFile
  * @param {string} sROMData
@@ -198,7 +198,7 @@ ROM.prototype.onLoadROM = function(sROMFile, sROMData, nErrorCode)
             var rom = eval("(" + sROMData + ")");
             var ab = rom['bytes'];
             var adw = rom['data'];
-            
+
             if (ab) {
                 this.abROM = ab;
             }
@@ -304,7 +304,7 @@ ROM.prototype.copyROM = function()
 
 /**
  * addROM(addr)
- * 
+ *
  * If addr is null or undefined, then it's presumably an unused addrROMAlias, which we simply ignore (it's not
  * considered a failure condition).
  *
diff --git a/my_modules/pcjs-client/lib/serial.js b/my_modules/pcjs-client/lib/serial.js
index a337794c8..00c894703 100644
--- a/my_modules/pcjs-client/lib/serial.js
+++ b/my_modules/pcjs-client/lib/serial.js
@@ -34,10 +34,10 @@
 "use strict";
 
 if (typeof module !== 'undefined') {
-    var web = require("../../shared/lib/weblib");
-    var Component = require("../../shared/lib/component");
-    var ChipSet = require("./chipset");
-    var State = require("./state");
+    var web         = require("../../shared/lib/weblib");
+    var Component   = require("../../shared/lib/component");
+    var ChipSet     = require("./chipset");
+    var State       = require("./state");
 }
 
 /**
@@ -57,7 +57,7 @@ if (typeof module !== 'undefined') {
  *
  * DOS typically names the Primary adapter "COM1" and the Secondary adapter "COM2", but I prefer
  * to stick to adapter numbers, since not all operating systems follow those naming conventions.
- * 
+ *
  * @constructor
  * @extends Component
  * @param {Object} parmsSerial
@@ -82,7 +82,7 @@ function SerialPort(parmsSerial) {
 
     /**
      * controlIOBuffer is a DOM element, if any, bound to the port (currently for output purposes only; see echoByte())
-     * 
+     *
      * @type {Object}
      */
     this.controlIOBuffer = null;
@@ -98,12 +98,12 @@ function SerialPort(parmsSerial) {
  * property {number} portBase
  * property {number} nIRQ
  * property {Object} controlIOBuffer is a DOM element, if any, bound to the port (for rudimentary output; see echoByte())
- * 
+ *
  * NOTE: This class declaration started as a way of informing the code inspector of the controlIOBuffer property,
  * which remained undefined until a setBinding() call set it later, but I've since decided that explicitly
  * initializing such properties in the constructor is a better way to go -- even though it's more code -- because
  * JavaScript compilers are supposed to be happier when the underlying object structures aren't constantly changing.
- * 
+ *
  * Besides, I'm not sure I want to get into documenting every property this way, for this or any/every other class,
  * let alone getting into which ones should be considered private or protected, because PCjs isn't really a library
  * for third-party apps.
@@ -113,10 +113,10 @@ Component.subclass(Component, SerialPort);
 
 /*
  * Internal name used for the I/O buffer control, if any, that we bind to the SerialPort.
- * 
+ *
  * Alternatively, if SerialPort wants to use another component's control (eg, the Panel's
  * "print" control), it can specify the name of that control with the 'binding' property.
- * 
+ *
  * For that binding to succeed, we also need to know the target component; for now, that's
  * been hard-coded to "Panel", in part because that's one of the few components we can rely
  * upon initializing before we do, but it would be a simple matter to include a component type
@@ -126,11 +126,11 @@ SerialPort.sIOBuffer = "buffer";
 
 /*
  * 8250 I/O register offsets (add these to a I/O base address to obtain an I/O port address)
- * 
+ *
  * NOTE: DLL.REG and DLM.REG form a 16-bit divisor into a clock input frequency of 1.8432Mhz.  The following
  * values should be used for the corresponding baud rates.  Rates above 9600 are discouraged by the IBM Tech Ref,
  * but rates as high as 128000 are listed on the NS8250A data sheet.
- * 
+ *
  *      Divisor     Rate        Percent Error
  *      0x0900      50
  *      0x0600      75
@@ -142,7 +142,7 @@ SerialPort.sIOBuffer = "buffer";
  *      0x0060      1200
  *      0x0040      1800
  *      0x003A      2000        0.69%
- *      0x0030      2400 
+ *      0x0030      2400
  *      0x0020      3600
  *      0x0018      4800
  *      0x0010      7200
@@ -173,7 +173,7 @@ SerialPort.IER.UNUSED       = 0xF0;     // always zero
 
 /*
  * Interrupt ID Register (IIR.REG, offset 2)
- * 
+ *
  * All interrupt conditions cleared by reading the corresponding register (or, in the case of IRR_INT_THR, writing a new value to THR.REG)
  */
 SerialPort.IIR = {};
@@ -216,7 +216,7 @@ SerialPort.MCR.UNUSED       = 0xE0;     // always zero
 
 /*
  * Line Status Register (LSR.REG, offset 5)
- * 
+ *
  * NOTE: I've seen different specs for the LSR_TSRE.  I'm following the IBM Tech Ref's lead here, but the data sheet I have calls it TEMT
  * instead of TSRE, and claims that it is set whenever BOTH the THR and TSR are empty, and clear whenever EITHER the THR or TSR contain data.
  */
@@ -247,7 +247,7 @@ SerialPort.MSR.RLSD         = 0x80;     // complement of the RLSD (Received Line
 
 /**
  * attachMouse(id, mouse)
- * 
+ *
  * @this {SerialPort}
  * @param {string} id
  * @param {Mouse} mouse component
@@ -265,7 +265,7 @@ SerialPort.prototype.attachMouse = function(id, mouse) {
  * syncMouse()
  *
  * NOTE: This is probably obsolete, but the Mouse component still might discover a need for it.  See Mouse.powerUp().
- * 
+ *
  * @this {SerialPort}
  *
 SerialPort.prototype.syncMouse = function() {
@@ -275,7 +275,7 @@ SerialPort.prototype.syncMouse = function() {
 
 /**
  * setBinding(sHTMLClass, sHTMLType, sBinding, control)
- * 
+ *
  * @this {SerialPort}
  * @param {string|null} sHTMLClass is the class of the HTML control (eg, "input", "output")
  * @param {string|null} sHTMLType is the type of the HTML control (eg, "button", "list", "text", "submit", "textarea", "canvas")
@@ -291,7 +291,7 @@ SerialPort.prototype.setBinding = function(sHTMLClass, sHTMLType, sBinding, cont
         /*
          * By establishing an onkeypress handler here, we make it possible for DOS commands like
          * "CTTY COM1" to more or less work (use "CTTY CON" to restore control to the DOS console).
-         * 
+         *
          * WARNING: This isn't really a supported feature yet; very much a work-in-progress.
          */
         control.onkeydown = function onKeyDownSerial(event) {
@@ -316,7 +316,7 @@ SerialPort.prototype.setBinding = function(sHTMLClass, sHTMLType, sBinding, cont
             serial.sendRBR([charCode]);
         };
         return true;
-    
+
     default:
         break;
     }
@@ -325,7 +325,7 @@ SerialPort.prototype.setBinding = function(sHTMLClass, sHTMLType, sBinding, cont
 
 /**
  * initBus(cmp, bus, cpu, dbg)
- * 
+ *
  * @this {SerialPort}
  * @param {Computer} cmp
  * @param {Bus} bus
@@ -347,7 +347,7 @@ SerialPort.prototype.initBus = function(cmp, bus, cpu, dbg) {
 
 /**
  * powerUp(data, fRepower)
- * 
+ *
  * @this {SerialPort}
  * @param {Object|null} data
  * @param {boolean} [fRepower]
@@ -366,7 +366,7 @@ SerialPort.prototype.powerUp = function(data, fRepower) {
 
 /**
  * powerDown(fSave)
- * 
+ *
  * @this {SerialPort}
  * @param {boolean} fSave
  * @return {Object|boolean}
@@ -377,7 +377,7 @@ SerialPort.prototype.powerDown = function(fSave) {
 
 /**
  * reset()
- * 
+ *
  * @this {SerialPort}
  */
 SerialPort.prototype.reset = function() {
@@ -388,7 +388,7 @@ SerialPort.prototype.reset = function() {
  * save()
  *
  * This implements save support for the SerialPort component.
- * 
+ *
  * @this {SerialPort}
  * @return {Object}
  */
@@ -402,7 +402,7 @@ SerialPort.prototype.save = function() {
  * restore(data)
  *
  * This implements restore support for the SerialPort component.
- * 
+ *
  * @this {SerialPort}
  * @param {Object} data
  * @return {boolean} true if successful, false if failure
@@ -413,7 +413,7 @@ SerialPort.prototype.restore = function(data) {
 
 /**
  * initState(data)
- * 
+ *
  * @this {SerialPort}
  * @param {Array} [data]
  * @return {boolean} true if successful, false if failure
@@ -454,7 +454,7 @@ SerialPort.prototype.initState = function(data) {
 
 /**
  * saveRegisters()
- * 
+ *
  * @this {SerialPort}
  * @return {Array}
  */
@@ -476,7 +476,7 @@ SerialPort.prototype.saveRegisters = function() {
 
 /**
  * sendRBR(ab)
- * 
+ *
  * @this {SerialPort}
  * @param {Array} ab is an array of bytes to propagate to the bRBR (Receiver Buffer Register)
  */
@@ -487,7 +487,7 @@ SerialPort.prototype.sendRBR = function(ab) {
 
 /**
  * advanceRBR()
- * 
+ *
  * @this {SerialPort}
  */
 SerialPort.prototype.advanceRBR = function() {
@@ -500,7 +500,7 @@ SerialPort.prototype.advanceRBR = function() {
 
 /**
  * inRBR(port, addrFrom)
- * 
+ *
  * @this {SerialPort}
  * @param {number} port (0x3F8 or 0x2F8)
  * @param {number} [addrFrom] (not defined whenever the Debugger tries to read the specified port)
@@ -516,7 +516,7 @@ SerialPort.prototype.inRBR = function(port, addrFrom) {
 
 /**
  * inIER(port, addrFrom)
- * 
+ *
  * @this {SerialPort}
  * @param {number} port (0x3F9 or 0x2F9)
  * @param {number} [addrFrom] (not defined whenever the Debugger tries to read the specified port)
@@ -530,7 +530,7 @@ SerialPort.prototype.inIER = function(port, addrFrom) {
 
 /**
  * inIIR(port, addrFrom)
- * 
+ *
  * @this {SerialPort}
  * @param {number} port (0x3FA or 0x2FA)
  * @param {number} [addrFrom] (not defined whenever the Debugger tries to read the specified port)
@@ -544,7 +544,7 @@ SerialPort.prototype.inIIR = function(port, addrFrom) {
 
 /**
  * inLCR(port, addrFrom)
- * 
+ *
  * @this {SerialPort}
  * @param {number} port (0x3FB or 0x2FB)
  * @param {number} [addrFrom] (not defined whenever the Debugger tries to read the specified port)
@@ -558,7 +558,7 @@ SerialPort.prototype.inLCR = function(port, addrFrom) {
 
 /**
  * inMCR(port, addrFrom)
- * 
+ *
  * @this {SerialPort}
  * @param {number} port (0x3FC or 0x2FC)
  * @param {number} [addrFrom] (not defined whenever the Debugger tries to read the specified port)
@@ -572,7 +572,7 @@ SerialPort.prototype.inMCR = function(port, addrFrom) {
 
 /**
  * inLSR(port, addrFrom)
- * 
+ *
  * @this {SerialPort}
  * @param {number} port (0x3FD or 0x2FD)
  * @param {number} [addrFrom] (not defined whenever the Debugger tries to read the specified port)
@@ -586,7 +586,7 @@ SerialPort.prototype.inLSR = function(port, addrFrom) {
 
 /**
  * inMSR(port, addrFrom)
- * 
+ *
  * @this {SerialPort}
  * @param {number} port (0x3FE or 0x2FE)
  * @param {number} [addrFrom] (not defined whenever the Debugger tries to read the specified port)
@@ -600,7 +600,7 @@ SerialPort.prototype.inMSR = function(port, addrFrom) {
 
 /**
  * outTHR(port, bOut, addrFrom)
- * 
+ *
  * @this {SerialPort}
  * @param {number} port (0x3F8 or 0x2F8)
  * @param {number} bOut
@@ -624,7 +624,7 @@ SerialPort.prototype.outTHR = function(port, bOut, addrFrom) {
 
 /**
  * outIER(port, bOut, addrFrom)
- * 
+ *
  * @this {SerialPort}
  * @param {number} port (0x3F9 or 0x2F9)
  * @param {number} bOut
@@ -641,7 +641,7 @@ SerialPort.prototype.outIER = function(port, bOut, addrFrom) {
 
 /**
  * outLCR(port, bOut, addrFrom)
- * 
+ *
  * @this {SerialPort}
  * @param {number} port (0x3FB or 0x2FB)
  * @param {number} bOut
@@ -654,7 +654,7 @@ SerialPort.prototype.outLCR = function(port, bOut, addrFrom) {
 
 /**
  * outMCR(port, bOut, addrFrom)
- * 
+ *
  * @this {SerialPort}
  * @param {number} port (0x3FC or 0x2FC)
  * @param {number} bOut
@@ -671,7 +671,7 @@ SerialPort.prototype.outMCR = function(port, bOut, addrFrom) {
 
 /**
  * updateIRR()
- * 
+ *
  * @this {SerialPort}
  */
 SerialPort.prototype.updateIRR = function() {
@@ -691,7 +691,7 @@ SerialPort.prototype.updateIRR = function() {
 
 /**
  * echoByte(b)
- * 
+ *
  * @this {SerialPort}
  * @param {number} b
  * @return {boolean} true if echoed, false if not
@@ -715,7 +715,7 @@ SerialPort.prototype.echoByte = function(b) {
  * messageDebugger(sMessage)
  *
  * This is a combination of the Debugger's messageEnabled(MESSAGE_SERIAL) and message() functions, for convenience.
- * 
+ *
  * @this {SerialPort}
  * @param {string} sMessage is any caller-defined message string
  */
@@ -731,7 +731,7 @@ SerialPort.prototype.messageDebugger = function(sMessage) {
  * messagePort(port, bOut, addrFrom, name, bIn)
  *
  * This is an internal version of the Debugger's messagePort() function, for convenience.
- * 
+ *
  * @this {SerialPort}
  * @param {number} port
  * @param {number|null} bOut if an output operation
diff --git a/my_modules/pcjs-client/lib/video.js b/my_modules/pcjs-client/lib/video.js
index 41c15e35c..f00ebfc02 100644
--- a/my_modules/pcjs-client/lib/video.js
+++ b/my_modules/pcjs-client/lib/video.js
@@ -96,13 +96,13 @@
 "use strict";
 
 if (typeof module !== 'undefined') {
-    var str = require("../../shared/lib/strlib");
-    var web = require("../../shared/lib/weblib");
-    var DumpAPI = require("../../shared/lib/dumpapi");
-    var Component = require("../../shared/lib/component");
-    var ChipSet = require("./chipset");
-    var Keyboard = require("./keyboard");
-    var State = require("./state");
+    var str         = require("../../shared/lib/strlib");
+    var web         = require("../../shared/lib/weblib");
+    var DumpAPI     = require("../../shared/lib/dumpapi");
+    var Component   = require("../../shared/lib/component");
+    var ChipSet     = require("./chipset");
+    var Keyboard    = require("./keyboard");
+    var State       = require("./state");
 }
 
 /**
@@ -130,9 +130,9 @@ if (typeof module !== 'undefined') {
  *      charRows: number of character rows
  *      fontROM: path to .rom file (or a JSON representation) that defines the character set
  *      screenColor: background color of the screen window (default is black)
- *      
+ *
  * An EGA may specify the following additional properties:
- * 
+ *
  *      switches: string representing EGA switches (see "SW1-SW4" documentation below)
  *      memory: the size of the EGA's on-board memory (overrides EGA's Video.cardSpecs)
  *
@@ -175,7 +175,7 @@ function Video(parmsVideo, canvas, context, textarea)
      */
     this.model = parmsVideo['model'];
     this.cbMemory = 0;
-    
+
     if (this.model == "ega") {
         this.sEGASW = parmsVideo['switches'];
         this.cbMemory = parmsVideo['memory'] || 0;      // zero means fallback to the cardSpec's default size
@@ -215,7 +215,7 @@ function Video(parmsVideo, canvas, context, textarea)
     this.fDoubleFont = Math.round(this.cxScreen / this.nDefaultCols) >= 12;
 
     this.fTouchScreen = parmsVideo['touchScreen'];
-    
+
     this.canvasScreen = canvas;
     this.contextScreen = context;
     this.textareaScreen = textarea;
@@ -229,13 +229,13 @@ function Video(parmsVideo, canvas, context, textarea)
      */
     this.addrBuffer = this.sizeBuffer = 0;
 
-    /* 
+    /*
      * aFonts is an array of font objects (ie, arrays) indexed by FONT ID.  Font characters are
      * arranged in 16x16 grids, with one grid per canvas object in the aCanvas array of each font object.
-     * 
+     *
      * Each element is a Font object that describes the font size and provides bitmaps for all the font
      * color permutations.  aFonts.length will be non-zero if ANY fonts are loaded, but do NOT assume
-     * that EVERY font has been loaded; check for the existence of a font by checking for its unique ID 
+     * that EVERY font has been loaded; check for the existence of a font by checking for its unique ID
      * within this sparse array.
      */
     this.aFonts = [];
@@ -249,10 +249,10 @@ function Video(parmsVideo, canvas, context, textarea)
     /*
      * Since I've not found clear documentation on a reliable way to check whether a particular DOM element
      * (other than the BODY element) has focus at any given time, I've added onfocus() and onblur() handlers
-     * to the canvas to maintain my own focus state. 
+     * to the canvas to maintain my own focus state.
      */
     this.fHasFocus = false;
-    
+
     var video = this;
     if (this.canvasScreen) {
         this.canvasScreen.onfocus = function onFocusCanvas() {
@@ -298,11 +298,11 @@ function Video(parmsVideo, canvas, context, textarea)
 
 Component.subclass(Component, Video);
 
-Video.TRAPALL = true;           // monitor all I/O by default (not just deltas) 
+Video.TRAPALL = true;           // monitor all I/O by default (not just deltas)
 
 /*
  * Supported Cards
- * 
+ *
  * Note that we choose IDs that match the default font ID for each card as well, just for consistency.
  */
 Video.CARDS = {};
@@ -312,22 +312,22 @@ Video.CARDS.EGA = 5;
 
 /*
  * Supported Monitors
- * 
+ *
  * The MDA monitor displays 350 lines of vertical resolution, 720 lines of horizontal resolution, and refreshes
  * at ~50Hz.  The CGA monitor displays 200 lines vertically, 640 horizontally, and refreshes at ~60Hz.
- * 
+ *
  * Based on actual MDA timings (see http://diylab.atwebpages.com/pressureDev.htm), the total horizontal
  * period (drawing a line and retracing) is ~54.25uSec (1000000uSec / 18432) and the horizontal retrace interval
  * is about 15% of that, or ~8.14uSec.  Vertical sync occurs once every 370 horizontal periods.  Of those 370,
  * only 354 represent actively drawn lines (and of those, only 350 are visible); the remaining 16 horizontal
- * periods, or 4% of the 370 total, represent the vertical retrace interval. 
- * 
+ * periods, or 4% of the 370 total, represent the vertical retrace interval.
+ *
  * I don't have similar numbers for the CGA or EGA, so for now, I assume similar percentages; ie, 15% of
  * the horizontal period will represent horizontal retrace, and 4% of the vertical pixel maximum (262) will
  * represent vertical retrace.  However, 24% of the CGA's 262 vertical maximum represents non-visible lines,
  * whereas only 5% of the MDA's 370 maximum represents non-visible lines; is there really that much "overscan"
  * on the CGA?
- * 
+ *
  * For each monitor type, there's a Video.monitorSpecs object that describes the horizontal and vertical
  * timings, along with my assumptions about the percentage of time that drawing is "active" within those periods,
  * and then based on the selected monitor type, I compute the number of CPU cycles that each period lasts,
@@ -335,7 +335,7 @@ Video.CARDS.EGA = 5;
  * retrace status flags can be quickly calculated.
  *
  * For reference, here are some important numbers to know (from https://github.com/reenigne/reenigne/blob/master/8088/cga/register_values.txt):
- * 
+ *
  *              CGA          MDA
  *  Pixel clock 14.318 MHz   16.257 MHz (aka "maximum video bandwidth", as IBM Tech Refs sometimes call it)
  *  Horizontal  15.700 KHz   18.432 KHz (aka "horizontal drive", as IBM Tech Refs sometimes call it)
@@ -405,22 +405,22 @@ Video.monitorSpecs[ChipSet.MONITOR.EGACOLOR] = {
 
 /*
  * EGA Miscellaneous ports and SW1-Sw4
- * 
+ *
  * The Card.MISC.CLK_SELECT bits determine which of the EGA board's 4 configuration switches are
  * returned via Card.STATUS0.SWSENSE (when SWSENSE is zero, the switch is closed):
- * 
+ *
  *      0xC: return SW1
  *      0x8: return SW2
  *      0x4: return SW3
  *      0x0: return SW4
- *      
+ *
  * These 4 bits are also copied to the byte at 40:88h by the EGA BIOS, where bit 0 is SW1, bit 1 is SW2,
  * bit 2 is SW3 and bit 3 is SW4.  Our switch settings come from bEGASW, which in turn comes from sEGASW,
  * which in turn comes from the "switches" property passed to the Video component, if any.
- * 
+ *
  * As usual, the switch settings are reversed in both direction and sense from the switch settings; the
  * good news, however, is that we can use the parseSwitches() method in the ChipSet component to parse them.
- * 
+ *
  * The set of valid EGA switch values, after conversion, is stored in the table below.  For each value,
  * there is an array that defines the corresponding monitor type(s) for the EGA adapter and any secondary
  * adapter.  The third value is a boolean indicating whether the EGA is the primary adapter.
@@ -442,7 +442,7 @@ Video.aEGAMonitorSwitches = {
 
 /*
  * Supported Modes
- * 
+ *
  * Although this component is designed to be a video hardware emulation, not a "BIOS simulation", we DO
  * look for changes to the hardware state that correspond to standard BIOS mode settings, so our internal
  * mode setting will normally match the current BIOS mode.  Since 99.9% of applications use only standard
@@ -450,7 +450,7 @@ Video.aEGAMonitorSwitches = {
  * we simply use common, familiar values wherever it makes sense to do so.  We do have some "BIOS awareness",
  * (eg, when we look for a ROM-based font, or when we're trying to ensure all the BIOS diagnostics pass),
  * but for the most part, we are treating the BIOS as just another (ROM-based) application.
- * 
+ *
  * As we expand support to include more programmable cards like the EGA, it becomes quite easy for the card
  * to enter a "mode" that has no BIOS counterpart (eg, non-standard combinations of frame buffer address,
  * memory access modes, fonts, display regions, etc).  Our hardware emulation routines will cope with those
@@ -475,23 +475,23 @@ Video.MODES.UNKNOWN          = 0xFF;
 
 /*
  * Supported Fonts
- * 
+ *
  * Once we've finished loading the standard 8K font file, aFonts[] should contain one or more of the
  * fonts listed below.  For the standard MDA/CGA font ROM, the first (MDA) font resides in the first 4K,
  * and the second and third (CGA) fonts reside in the two 2K halves of the second 4K.
- * 
+ *
  * It may seem odd that the cell size for FONT_CGAD is *larger* than the cell size for FONT_CGA,
  * since 40-column mode is actually lower resolution, but since we don't shrink the window when we shrink
  * the mode, the characters must be drawn larger, and they look better if we don't have to scale them.
- * 
+ *
  * From the IBM EGA Manual (p.5):
- * 
+ *
  *     "In alphanumeric modes, characters are formed from one of two ROM (Read Only Memory) character
  *      generators on the adapter. One character generator defines 7x9 characters in a 9x14 character box.
  *      For Enhanced Color Display support, the 9x14 character set is modified to provide an 8x14 character set.
  *      The second character generator defines 7x7 characters in an 8x8 character box. These generators contain
  *      dot patterns for 256 different characters. The character sets are identical to those provided by the
- *      IBM Monochrome Display Adapter and the IBM Color/Graphics Monitor Adapter." 
+ *      IBM Monochrome Display Adapter and the IBM Color/Graphics Monitor Adapter."
  */
 Video.FONTS = {};
 Video.FONTS.MDA     = 1;        // 9x14 monochrome font
@@ -503,19 +503,19 @@ Video.FONTS.EGAD    = 10;       // 18x28 color font (this is the 9x14 EGA font d
 
 /*
  * For each video mode, we need to know the following pieces of information:
- * 
+ *
  *      0: # of columns (nCols)
  *      1: # of rows (nRows)
  *      2: # cells per word (nCellsPerWord: # of characters or pixels per word)
  *      3: # bytes of visible screen padding, if any (used for CGA graphics modes only)
  *      4: font ID (nFont: undefined if graphics mode)
- *      
+ *
  * By calculating ([0] * [1]) / [2], we obtain the number of 16-bit words that mode actively displays;
  * for example, the amount of visible memory used by mode 0x04 is (320 * 200) / 4, or 16000.
- *      
+ *
  * The MODES.CGA_40X25 modes specify FONT_CGA instead of FONT_CGAD because we don't automatically
  * load the FONT_CGAD unless the screen is large enough to accommodate it (see the fDoubleFont calculation).
- * 
+ *
  * To compensate, we have code in setDimensions() that automatically switches to FONT_CGAD if it's loaded AND
  * the cell size warrants the larger font.  We could hard-code FONT_CGAD here, but then we'd always load it,
  * and it might not always be the best fit.
@@ -527,8 +527,8 @@ Video.aModeParms[Video.MODES.CGA_320X200]       = [320, 200,  8, 192];
 Video.aModeParms[Video.MODES.CGA_640X200]       = [640, 200, 16, 192];                              // 0x06
 Video.aModeParms[Video.MODES.MDA_80X25]         = [ 80,  25,  1,   0, Video.FONTS.MDA];             // 0x07
 Video.aModeParms[Video.MODES.EGA_320X200]       = [320, 200, 16];                                   // 0x0D
-Video.aModeParms[Video.MODES.EGA_640X200]       = [640, 200, 16];                                   // 0x0E 
-Video.aModeParms[Video.MODES.EGA_640X350_MONO]  = [640, 350, 16];                                   // 0x0F 
+Video.aModeParms[Video.MODES.EGA_640X200]       = [640, 200, 16];                                   // 0x0E
+Video.aModeParms[Video.MODES.EGA_640X350_MONO]  = [640, 350, 16];                                   // 0x0F
 Video.aModeParms[Video.MODES.EGA_640X350]       = [640, 350, 16];                                   // 0x10
 
 Video.aModeParms[Video.MODES.CGA_40X25_BW]      = Video.aModeParms[Video.MODES.CGA_40X25];          // 0x01
@@ -537,13 +537,13 @@ Video.aModeParms[Video.MODES.CGA_320X200_BW]    = Video.aModeParms[Video.MODES.C
 
 /*
  * MDA attribute byte definitions
- * 
+ *
  * For MDA, only the following group of ATTR definitions are supported; any FGND/BGND value combinations
  * outside this group will be treated as "normal" (ATTR_FGND_WHITE | ATTR_BGND_BLACK).
- * 
+ *
  * NOTE: Assuming MDA.MODE.BLINK_ENABLE is set (which the ROM BIOS sets by default), ATTR_BGND_BLINK will
  * cause the *foreground* element of the cell to blink, even though it is part of the *background* attribute bits.
- * 
+ *
  * Regarding blink rate, characters are supposed to blink every 16 vertical frames, which amounts to .26667 blinks
  * per second, assuming a 60Hz vertical refresh rate.  So roughly every 267ms, we need to take care of any blinking
  * characters.  updateScreen() maintains a global count (cBlinkVisible) of blinking characters, to simplify the
@@ -564,7 +564,7 @@ Video.ATTRS.DRAW_CURSOR = 0x200;        // this is an internal attribute bit, in
 /*
  * Here's a "cheat sheet" for attribute byte combinations that the IBM MDA could have supported.  The original (Aug 1981)
  * IBM Tech Ref is very terse and implies that only those marked with * are actually supported.
- * 
+ *
  *     *0x00: non-display                       ATTR_FGND_BLACK |                    ATTR_BGND_BLACK
  *     *0x01: underline                         ATTR_FGND_ULINE |                    ATTR_BGND_BLACK
  *     *0x07: normal (white on black)           ATTR_FGND_WHITE |                    ATTR_BGND_BLACK
@@ -576,29 +576,29 @@ Video.ATTRS.DRAW_CURSOR = 0x200;        // this is an internal attribute bit, in
  *      0x89: blinking bright underline         ATTR_FGND_ULINE | ATTR_FGND_BRIGHT | ATTR_BGND_BLINK (or dim background if blink disabled)
  *    **0x8F: blinking bold                     ATTR_FGND_WHITE | ATTR_FGND_BRIGHT | ATTR_BGND_BLINK (or dim background if blink disabled)
  *    **0xF0: blinking reverse                  ATTR_FGND_WHITE | ATTR_FGND_BRIGHT | ATTR_BGND_BLINK (or bright background if blink disabled)
- *  
+ *
  * Unsupported attributes reportedly display as "normal" (ATTR_FGND_WHITE | ATTR_BGND_BLACK).  However, precisely which
  * attributes are unsupported on the MDA varies depending on the source. Some sources (eg, the IBM Tech Ref) imply that
  * only those marked by * are supported, while others (eg, some--but not all--Peter Norton guides) include those marked
  * by **, and still others include ALL the combinations listed above.
- * 
+ *
  * Furthermore, according to http://www.seasip.info/VintagePC/mda.html:
- * 
+ *
  *      Attributes 0x00, 0x08, 0x80 and 0x88 display as black space;
  *      Attribute 0x78 displays as dark green on green; depending on the monitor, there may be a green "halo" where the dark and bright bits meet;
  *      Attribute 0xF0 displays as a blinking version of 0x70 if blink enabled, and black on bright green otherwise;
  *      Attribute 0xF8 displays as a blinking version of 0x78 if blink enabled, and as dark green on bright green otherwise.
- * 
+ *
  * However, I'm rather skeptical about supporting 0x78 and 0xF8, until I see some evidence that "bright black" actually
  * produced dark green on IBM equipment; it also doesn't sound like a combination many people would have used.  I'll probably
  * treat all of 0x08, 0x80 and 0x88 the same as 0x00, only because it seems logical (they're all "black on black" combinations
  * with only BRIGHT and/or BLINK bits set). Beyond that, I'll likely treat any other combination not listed in the above cheat
  * sheet as "normal".
- * 
+ *
  * All the discrepancies/disagreements I've found are probably due in part to the proliferation of IBM and non-IBM MDA
  * cards, combined with IBM and non-IBM monochrome monitors, and people assuming that their non-IBM card and/or monitor
  * behaved exactly like the original IBM equipment, which probably wasn't true in all cases.
- * 
+ *
  * I would like to limit my MDA display support to EXACTLY everything that the IBM MDA supported and nothing more, but
  * since there will be combinations that will logically "fall out" unless I specifically exclude them, it's very likely
  * this implementation will end up being a superset.
@@ -697,9 +697,9 @@ Video.aEGADWToByte[0x80808080] = 0xf;
  *
  * Creates an object representing an initial video card state;
  * can also restore a video card from state data created by saveCard().
- * 
+ *
  * See new Card().
- * 
+ *
  * @constructor
  * @param {Video} [video]
  * @param {number} [iCard] (see Video.CARDS.*)
@@ -713,14 +713,14 @@ function Card(video, iCard, data, cbMemory)
      * so we need to detect that case and continue indicating that the card is not present.
      */
     if (iCard !== undefined && (!data || data.length)) {
-        
+
         var specs = Video.cardSpecs[iCard];
         var nMonitorType = video.nMonitorType || specs[5];
 
         if (!data || data.length < 6) {
             data = [false, 0, null, null, 0, new Array(Card.CRTC.TOTAL_REGS)];
         }
-        
+
         /*
          * If a Debugger is present, we want to stash a bit more info in each Card.
          */
@@ -729,11 +729,11 @@ function Card(video, iCard, data, cbMemory)
             this.type = specs[0];
             this.port = specs[1];
         }
-        
+
         this.iCard = iCard;
         this.addrBuffer = specs[2];     // default (physical) frame buffer address
         this.sizeBuffer = specs[3];     // default frame buffer length (this is the total size, not the current visible size; this.cbScreen is calculated on the fly to reflect the latter)
-        
+
         /*
          * If no memory size is specified, then setMode() will use addMemory() to automatically add enough
          * memory blocks to cover the frame buffer specified above; otherwise, it instructs addMemory() to call
@@ -742,16 +742,16 @@ function Card(video, iCard, data, cbMemory)
          * the underlying memory.
          */
         this.cbMemory = cbMemory || specs[4];
-        
+
         /*
          * All of our cardSpec frame buffer sizes are based on the default text mode (eg, 4Kb for an MDA, 16Kb for
          * a CGA), but for a card with 64Kb or more of memory (ie, any EGA card), the default text mode frame buffer
-         * size should be dynamically recalculated as the smaller of: cbMemory divided by 4, or 32Kb. 
+         * size should be dynamically recalculated as the smaller of: cbMemory divided by 4, or 32Kb.
          */
         if (this.cbMemory >= 0x10000 && this.addrBuffer >= 0xB0000) {
             this.sizeBuffer = Math.min(this.cbMemory >> 2, 0x8000);
         }
-        
+
         this.fActive   = data[0];
         this.modeReg   = data[1];       // see MDA.MODE* or CGA.MODE_* (use (MDA.MODE.HIRES | MDA.MODE.VIDEO_ENABLE | MDA.MODE.BLINK_ENABLE) if you want to test blinking immediately after the initial power-on reset)
         this.colorReg  = data[2];       // see CGA.COLOR.* (undefined on MDA)
@@ -761,15 +761,15 @@ function Card(video, iCard, data, cbMemory)
         this.aCRTCRegs = data[5];
         this.nCRTCRegs = Card.CRTC.TOTAL_REGS;
         this.asCRTCRegs = DEBUGGER? Card.CRTC.REGS : [];
-        
+
         if (iCard == Video.CARDS.EGA) {
             this.nCRTCRegs = Card.CRTC.EGA.TOTAL_REGS;
             this.asCRTCRegs = DEBUGGER? Card.CRTC.EGA_REGS : [];
             this.initEGA(data[6], nMonitorType);
         }
-        
+
         var monitorSpecs = Video.monitorSpecs[nMonitorType] || Video.monitorSpecs[ChipSet.MONITOR.MONO];
-        
+
         var nCyclesPerSecond = video.cpu.getCyclesPerSecond();      // eg, 4772727
         this.nCyclesHorzPeriod = (nCyclesPerSecond / monitorSpecs.nHorzPeriodsPerSec) | 0;
         this.nCyclesHorzActive = (this.nCyclesHorzPeriod * monitorSpecs.percentHorzActive / 100) | 0;
@@ -850,12 +850,12 @@ Card.CGA.PRESET_PEN.PORT    = 0x3DC;
 
 /*
  * Common CRT hardware registers, accessed via Card.XXA.CRTC.INDX.PORT and Card.XXA.CRTC.DATA.PORT
- * 
+ *
  * NOTE: In this implementation, because we have to make at least two of the registers readable (CURSOR_ADDR_HI and CURSOR_ADDR_LO),
  * we end up making ALL the registers readable, otherwise we would have to explicitly block any register marked write-only.  I don't
  * think making the CRT registers fully readable presents any serious compatibility issues, and it actually offers some benefits
  * (eg, improved debugging).
- * 
+ *
  * However, some things are broken: the (readable) light pen registers on the EGA are overloaded as (writable) vertical retrace
  * registers, so the vertical retrace registers cannot actually be read that way.  I'm sure the VGA solved that problem, but I haven't
  * looked into it yet.
@@ -877,7 +877,7 @@ Card.CRTC.CURSOR_START.INDX     = 0x0A;
 Card.CRTC.CURSOR_START.MASK     = 0x1F;
 /*
  * I don't entirely understand these cursor blink control bits.  Here's what the MC6845 datasheet says:
- * 
+ *
  *      Bit 5 is the blink timing control.  When bit 5 is low, the blink frequency is 1/16 of the vertical field rate,
  *      and when bit 5 is high, the blink frequency is 1/32 of the vertical field rate.  Bit 6 is used to enable a blink.
  */
@@ -902,12 +902,12 @@ Card.CRTC.EGA.VERT_BLANK_START  = 0x15;
 Card.CRTC.EGA.VERT_BLANK_END    = 0x16;
 Card.CRTC.EGA.MODE_CTRL = {};
 Card.CRTC.EGA.MODE_CTRL.INDX    = 0x17;
-Card.CRTC.EGA.MODE_CTRL.CMS     = 0x01;     // Compatibility Mode Support (CGA A13 control) 
+Card.CRTC.EGA.MODE_CTRL.CMS     = 0x01;     // Compatibility Mode Support (CGA A13 control)
 Card.CRTC.EGA.MODE_CTRL.SRSC    = 0x02;     // Select Row Scan Counter
 Card.CRTC.EGA.MODE_CTRL.HRS     = 0x04;     // Horizontal Retrace Select
 Card.CRTC.EGA.MODE_CTRL.CBT     = 0x08;     // Count By Two
 Card.CRTC.EGA.MODE_CTRL.OC      = 0x10;     // Output Control
-Card.CRTC.EGA.MODE_CTRL.AW      = 0x20;     // Address Wrap (in Word mode, 1 maps A15 to A0 and 0 maps A13; use the latter when only 64Kb is installed)   
+Card.CRTC.EGA.MODE_CTRL.AW      = 0x20;     // Address Wrap (in Word mode, 1 maps A15 to A0 and 0 maps A13; use the latter when only 64Kb is installed)
 Card.CRTC.EGA.MODE_CTRL.BM      = 0x40;     // Byte Mode (1 selects Byte Mode; 0 selects Word Mode)
 Card.CRTC.EGA.MODE_CTRL.HR      = 0x80;     // Hardware Reset
 Card.CRTC.EGA.LINE_COMPARE      = 0x18;
@@ -933,7 +933,7 @@ Card.STATUS1 = {};
 Card.STATUS1.PORT           = 0x3DA;
 /*
  * STATUS1 diagnostic bits 5 and 4 are set according to the Card.ATC.PLANES.MUX bits:
- * 
+ *
  *      MUX     Bit 5   Bit 4
  *      ---     ----    ----
  *      00:     Red     Blue
@@ -945,12 +945,12 @@ Card.STATUS1.DIAGNOSTIC     = 0x30;     // these bits are controlled by the Card
 
 /*
  * EGA Attribute Controller (ATC) ports
- * 
+ *
  * The current ATC INDX value is stored in cardEGA.iATCReg (including the Card.ATC.INDX_ENABLE bit), and the
  * ATC DATA values are stored in cardEGA.aATCRegs.  Also, the state of the ATC INDX/DATA flip-flop is stored in fATCData.
- * 
+ *
  * Note that the ATC palette registers (0x0-0xf) all use the following 6 bit assignments, with bits 6 and 7 unused:
- * 
+ *
  *      0: Blue
  *      1: Green
  *      2: Red
@@ -1003,7 +1003,7 @@ Card.MISC.VERT_POLARITY     = 0x80;     // 0 selects positive vertical retrace
 /*
  * The EGA BIOS writes 0x1 to Card.FEAT_CTRL.BITS and reads Card.STATUS0.FEAT, then writes 0x2 to
  * Card.FEAT_CTRL.BITS and reads Card.STATUS0.FEAT.  The bits from the first and second reads are shifted
- * into the high nibble of the byte at 40:88h. 
+ * into the high nibble of the byte at 40:88h.
  */
 Card.FEAT_CTRL = {};
 Card.FEAT_CTRL.PORT         = 0x3DA;    // or 0x3BA; write-only (other than the two bits below, the rest are reserved and/or unused)
@@ -1098,7 +1098,7 @@ Card.GRC.MODE.EVENODD       = 0x10;
 Card.GRC.MODE.SHIFT         = 0x20;
 Card.GRC.MISC = {};
 Card.GRC.MISC.INDX          = 0x06;     // MISCELLANEOUS
-Card.GRC.MISC.GRAPHICS      = 0x01;     // set for graphics mode addressing, clear for text mode addressing 
+Card.GRC.MISC.GRAPHICS      = 0x01;     // set for graphics mode addressing, clear for text mode addressing
 Card.GRC.MISC.CHAIN         = 0x02;     // set for odd/even planes selected with odd/even values of the processor AO bit
 Card.GRC.MISC.MAPMEM        = 0x0C;     //
 Card.GRC.MISC.MAPA0128      = 0x00;     //
@@ -1115,18 +1115,18 @@ if (DEBUGGER) Card.GRC.REGS = ["SRESET","ESRESET","COLRCMP","DATAROT","READMAP",
 
 /*
  * EGA Memory Access Functions
- * 
+ *
  * Here's where we define all the getMemoryAccess() functions that know how to deal with "planar" EGA memory,
  * which consists of 32-bit values for every byte of address space, allowing us to internally store plane 0
- * bytes in bits 0-7, plane 1 bytes in bits 8-15, plane 2 bytes in bits 16-23, and plane 3 bytes in bits 24-31. 
- * 
+ * bytes in bits 0-7, plane 1 bytes in bits 8-15, plane 2 bytes in bits 16-23, and plane 3 bytes in bits 24-31.
+ *
  * All our functions have slightly more overhead than the standard Bus memory access functions, because the
  * offset (off) parameter is block-relative, which we must transform into a buffer-relative offset.  Fortunately,
  * all our Memory objects know this and have already recorded their buffer-relative offset in "this.offset".
  *
  * Also, the EGA includes a set of latches, one for each plane, which must be updated on most reads/writes;
  * we rely on the Memory object's "this.controller" property to give us access to the Card's state.
- * 
+ *
  * And we take a little extra time to conditionally set fDirty on writes, meaning if a write did not actually
  * change the value of the memory, we will not set fDirty.  The default write functions in mem.js don't take that
  * performance hit, but here, it may be worthwhile, because if it results in fewer dirty blocks, display updates
@@ -1135,10 +1135,10 @@ if (DEBUGGER) Card.GRC.REGS = ["SRESET","ESRESET","COLRCMP","DATAROT","READMAP",
  * Note that we don't have to worry about dealing with word accesses that straddle block boundaries, because
  * the Bus component automatically breaks those accesses into separate byte requests.  Similarly, byte and word
  * values for the write functions have already been pre-masked by the Bus component to 8 and 16 bits, respectively.
- * 
+ *
  * My motto: Be paranoid, but also be careful not to do any more work than you absolutely have to.
  *
- * 
+ *
  * CGA Emulation on the EGA
  *
  * Modes 4/5 (320x200 low-res graphics) emulate the same buffer format that the CGA uses.  To recap: 1 byte contains
@@ -1146,27 +1146,27 @@ if (DEBUGGER) Card.GRC.REGS = ["SRESET","ESRESET","COLRCMP","DATAROT","READMAP",
  * Moreover, all even rows are stored in the first 8K of the frame buffer (at 0xB8000), and all odd rows are stored
  * in the second 8K (at 0xBA000).  Of each 8K, only 8000 (0x1F40) bytes are used (80 bytes X 100 rows); the remaining
  * 192 bytes of each 8K are unused.
- * 
+ *
  * For these modes, the EGA's GRC.MODE is programmed with 0x30: Card.GRC.MODE.EVENODD and Card.GRC.MODE.SHIFT.
  * The latter claims to work by forming each 2-bit pixel with even bits from plane 0 and odd bits from plane 1;
  * however, I'm unclear how that works if even bytes are only written to plane 0 and odd bytes are only written to
  * plane 1, as Card.GRC.MODE.EVENODD implies, because plane 0 would never have any bits for the odd bytes, and
  * plane 1 would never have any bits for the even bytes.  Clearly, I'm missing something.
  *
- *  
+ *
  * Even/Odd Memory Access Functions
- * 
+ *
  * The "EVENODD" functions deal with the EGA's default text-mode addressing, where every EVEN address is mapped to
  * plane 0 (and plane 2) and every ODD address is mapped to plane 1 (and plane 3).  This occurs when SEQ.MODE.SEQUENTIAL
  * is clear (and GRC.MODE.EVENODD is set), turning address bit 0 (A0) into a "plane select" bit.  Whether A0 is
  * also used as a memory address bit depends on CRTC.MODE_CTRL.BM: if it's set, then we're in "Byte Mode" and A0 is
  * used as-is; if it's clear, then we're in "Word Mode", and either A15 (when CRTC.MODE_CTRL.AW is set) or A13
  * (when CRTC.MODE_CTRL.AW is clear, typically when only 64Kb of EGA memory is installed) is substituted for A0.
- * 
+ *
  * Note that A13 remains clear until addresses reach 8K, at which point we've spanned 32Kb of EGA memory, so it makes
  * sense to propagate A13 to A0 at that point, so that the next 8K of addresses start using ODD instead of EVEN bytes,
  * and no memory is wasted on a 64Kb EGA card.
- * 
+ *
  * These functions, however, don't yet deal with all those subtleties: A0 is currently used only as a "plane select"
  * bit and set to zero for addressing purposes, meaning that only the EVEN bytes in EGA memory will ever be used.
  */
@@ -1251,7 +1251,7 @@ Card.ACCESS.readByteMode0EvenOdd = function readByteMode0EvenOdd(off)
 
 /**
  * readByteMode1(off)
- * 
+ *
  * @this {Memory}
  * @param {number} off
  * @return {number}
@@ -1531,25 +1531,25 @@ Card.ACCESS.afn[Card.ACCESS.WRITE.MODE2XOR] = Card.ACCESS.writeByteMode2Xor;
 
 /**
  * initEGA(data)
- * 
+ *
  * Another one of my frustrations with JSON is that it encodes empty arrays with non-zero lengths as
  * arrays of nulls, which means that any uninitialized register arrays whose elements were all originally
  * undefined come back via the JSON round-trip as *initialized* arrays whose elements are now all null.
- * 
+ *
  * I'm a bit surprised, because Crockford would want us to always use the '===' operator to determine whether
  * an element is initialized (eg, 'aReg[i] === undefined'), but because of this JSON stupidity, I would have
- * to change all such tests to 'aReg[i] === undefined || aReg[i] === null'.  Great.  
- * 
+ * to change all such tests to 'aReg[i] === undefined || aReg[i] === null'.  Great.
+ *
  * The solution is to change such comparisons to 'aReg[i] == null' because undefined is coerced to null but
  * numeric values are not.  Crockford refers to '==' as an "evil" operator, but yet it's OK for JSON to
  * effectively treat 'undefined' the same as 'null'?  Give me a break!
- * 
+ *
  * [What do I mean by "another" frustration?  Let me talk to you some day about disallowing hex constants,
  * or insisting that property names be quoted, for starters.  I think it's fine for JSON.stringify() to
  * produce output that adheres to those rules by default -- although some stringify() options to control
  * how "portable" the output is would be nice -- but refusing to let JSON.parse() parse objects that are,
  * in fact, perfectly parseable, is just JSON being a dick.]
- * 
+ *
  * @this {Card}
  * @param {Array|undefined} data
  * @param {number} nMonitorType
@@ -1596,7 +1596,7 @@ Card.prototype.initEGA = function(data, nMonitorType)
     this.asATCRegs  = DEBUGGER? Card.ATC.REGS : [];
     this.status0    = data[3];      // aka STATUS0 (not to be confused with this.statusReg, which the EGA refers to as STATUS1)
     this.miscReg    = data[4];
-    this.featReg    = data[5];      // for feature control bits, see Card.FEAT_CTRL.BITS; for feature status bits, see Card.STATUS0.FEAT 
+    this.featReg    = data[5];      // for feature control bits, see Card.FEAT_CTRL.BITS; for feature status bits, see Card.STATUS0.FEAT
     this.iSEQReg    = data[6];
     this.aSEQRegs   = data[7];
     this.asSEQRegs  = DEBUGGER? Card.SEQ.REGS : [];
@@ -1613,14 +1613,14 @@ Card.prototype.initEGA = function(data, nMonitorType)
         this.adwMemory = State.decompressEvenOdd(this.adwMemory, cdw);
     }
     this.setMemoryAccess(data[15]);
-    
+
     /*
      * nReadMapShift must perfectly track how the GRC.READMAP register is programmed, so that Card.ACCESS.READ.MODE0
      * memory read functions read the appropriate plane.  This default is not terribly critical, unless Card.ACCESS.WRITE.MODE0
      * is chosen as our default AND you want the screen randomizer to work.
      */
     this.nReadMapShift  = data[16];
-    
+
     /*
      * Similarly, nWriteMapMask must perfectly track how the SEQ.MAPMASK register is programmed, so that memory write
      * functions write the appropriate plane(s).  Again, this default is not terribly critical, unless Card.ACCESS.WRITE.MODE0
@@ -1638,7 +1638,7 @@ Card.prototype.initEGA = function(data, nMonitorType)
 
 /**
  * saveCard()
- * 
+ *
  * @this {Card}
  * @return {Array}
  */
@@ -1662,7 +1662,7 @@ Card.prototype.saveCard = function()
 
 /**
  * saveEGA()
- * 
+ *
  * @this {Card}
  * @return {Array}
  */
@@ -1709,16 +1709,16 @@ Card.prototype.dumpCard = function()
          * Start with registers that are common to all cards....
          */
         this.dumpRegs("CRTC", this.iCRTCReg, this.aCRTCRegs, this.asCRTCRegs);
-    
+
         if (this.iCard == Video.CARDS.MDA || this.iCard == Video.CARDS.CGA) {
             this.dumpRegs(" MODEREG", this.modeReg);
             this.dumpRegs(" STATUS1", this.statusReg);
         }
-    
+
         if (this.iCard == Video.CARDS.CGA) {
             this.dumpRegs("   COLOR", this.colorReg);
         }
-    
+
         if (this.iCard == Video.CARDS.EGA) {
             this.dbg.message(" ATCDATA: " + this.fATCData);
             this.dumpRegs(" ATC", this.iATCReg, this.aATCRegs, this.asATCRegs);
@@ -1773,7 +1773,7 @@ Card.prototype.dumpBuffer = function(sParm)
  *
  * Since we don't pre-allocate the register arrays (eg, ATC, CRTC, GRC, etc) on a Card, we can't
  * rely on their array length, so we instead rely on the number of register names supplied in asRegs.
- * 
+ *
  * @this {Card}
  * @param {string} sName
  * @param {number} iReg
@@ -1819,7 +1819,7 @@ Card.prototype.getMemoryBuffer = function(addr)
  * getMemoryAccess()
  *
  * Return the last set of memory access functions recorded by setMemoryAccess().
- * 
+ *
  * @this {Card}
  * @return {Array.}
  */
@@ -1834,7 +1834,7 @@ Card.prototype.getMemoryAccess = function()
  * This transforms the memory access value that getAccess() returns into the best available set of
  * memory access functions, which are then returned via getMemoryAccess() to any memory blocks we allocate
  * or modify.
- * 
+ *
  * @this {Card}
  * @param {number|undefined} nAccess
  */
@@ -1869,26 +1869,26 @@ Card.prototype.setMemoryAccess = function(nAccess)
 
 /*
  * Card Specifications
- * 
+ *
  * We support dynamically switching between MDA and CGA cards by simply flipping switches on
  * the virtual SW1 switch block and resetting the machine.  However, I'm not sure I'll support
  * dynamically switching the EGA card the same way; there's certainly no UI for it at this point.
- * 
+ *
  * For each supported card, there is a cardSpec array that the Card class uses to initialize the
  * card's defaults:
- * 
+ *
  *      [0]: card descriptor
  *      [1]: default CRTC port address
  *      [2]: default frame buffer address
  *      [3]: default frame buffer size
  *      [4]: total on-board memory (if no "memory" parm was specified)
  *      [5]: default monitor type
- *      
+ *
  * If total on-board memory is zero, then addMemory() will simply add the specified frame buffer
  * to the address space; otherwise, we will allocate an internal buffer (adwMemory) and tell addMemory()
  * to map it to the frame buffer address.  The latter approach gives us total control over the buffer;
  * refer to getMemoryAccess().
- * 
+ *
  * TODO: Consider allocating our own buffer for all video cards, not just EGA.  For MDA/CGA, I'm not sure
  * it would offer any benefits, other than allowing our internal update functions, like updateScreen(),
  * to access the buffer directly, instead of going through the Bus memory interface.
@@ -1907,10 +1907,10 @@ Video.BIOS = {
 
 /**
  * initBus(cmp, bus, cpu, dbg)
- * 
+ *
  * This is a notification issued by the Computer component, after all the other components (notably the CPU)
  * have had a chance to initialize.
- * 
+ *
  * @this {Video}
  * @param {Computer} cmp
  * @param {Bus} bus
@@ -1922,15 +1922,15 @@ Video.prototype.initBus = function(cmp, bus, cpu, dbg)
     this.bus = bus;
     this.cpu = cpu;
     this.dbg = dbg;
-    
+
     bus.addPortInputTable(this, Video.aPortInput);
     bus.addPortOutputTable(this, Video.aPortOutput);
-    
+
     if (this.model == "ega") {
         bus.addPortInputTable(this, Video.aEGAPortInput);
         bus.addPortOutputTable(this, Video.aEGAPortOutput);
     }
-    
+
     if (DEBUGGER && dbg) {
         var video = this;
         this.cpu.addIntNotify(Video.BIOS.INT_VIDEO, this, this.intBIOSVideo);
@@ -1938,7 +1938,7 @@ Video.prototype.initBus = function(cmp, bus, cpu, dbg)
             video.dumpVideo(sParm);
         });
     }
-    
+
     /*
      * If we have an associated keyboard, then ensure that the keyboard will be notified whenever
      * the canvas gets focus and receives input.
@@ -1947,13 +1947,13 @@ Video.prototype.initBus = function(cmp, bus, cpu, dbg)
     if (this.kbd && this.canvasScreen) {
         this.kbd.setBinding("input", this.textareaScreen? "textarea" : "canvas", "kbd", this.textareaScreen || this.canvasScreen);
     }
-    
+
     this.bEGASW = 0x9;          // our default "switches" setting (see aEGAMonitorSwitches)
     this.chipset = cmp.getComponentByType("ChipSet");
     if (this.chipset && this.sEGASW) {
         this.bEGASW = this.chipset.parseSwitches(this.sEGASW, this.bEGASW);
     }
-    
+
     if (this.kbd && this.fTouchScreen) this.captureTouch();
 };
 
@@ -2018,9 +2018,9 @@ Video.prototype.setFocus = function()
 
 /**
  * getCanvas()
- * 
+ *
  * This is an interface used by the Mouse component, so that it can invoke capture/release mouse events from the screen element.
- * 
+ *
  * @this {Video}
  * @return {Object|undefined}
  */
@@ -2031,7 +2031,7 @@ Video.prototype.getCanvas = function()
 
 /**
  * captureTouch()
- * 
+ *
  * @this {Video}
  */
 Video.prototype.captureTouch = function()
@@ -2080,7 +2080,7 @@ Video.prototype.captureTouch = function()
 
 /**
  * onFocusChange(fFocus)
- * 
+ *
  * @this {Video}
  * @param {boolean} fFocus is true if gaining focus, false if losing it
  */
@@ -2098,7 +2098,7 @@ Video.prototype.releaseTouch = function()
 
 /**
  * onTouchStart(event)
- * 
+ *
  * @this {Video}
  * @param {Event} event object from a 'touch' event
  */
@@ -2110,7 +2110,7 @@ Video.prototype.onTouchStart = function(event)
 
 /**
  * onTouchMove(event)
- * 
+ *
  * @this {Video}
  * @param {Event} event object from a 'touch' event
  */
@@ -2122,7 +2122,7 @@ Video.prototype.onTouchMove = function(event)
 
 /**
  * onTouchEnd(event)
- * 
+ *
  * @this {Video}
  * @param {Event} event object from a 'touch' event
  */
@@ -2133,7 +2133,7 @@ Video.prototype.onTouchEnd = function(event)
 
 /**
  * processTouchEvent(event, fStart)
- * 
+ *
  * @this {Video}
  * @param {Event} event object from a 'touch' event
  * @param {boolean} fStart if this is a 'touchstart' event
@@ -2145,7 +2145,7 @@ Video.prototype.processTouchEvent = function(event, fStart)
      * My thinking here is that if the canvas does NOT yet have focus, then we should actually SKIP
      * the usual preventDefault() call, so that everything the user has come to expect (eg, activation of
      * the soft keyboard) will work as before.
-     * 
+     *
      * The process of touching the canvas means it should ultimately receive focus, and as long as it
      * retains focus, preventDefault() will always be called.
      */
@@ -2153,7 +2153,7 @@ Video.prototype.processTouchEvent = function(event, fStart)
     /*
      * Touch coordinates (that is, the pageX and pageY properties) are relative to the page, so to make
      * them relative to the canvas, we must subtract the canvas's left and top positions.  This Apple web page:
-     * 
+     *
      *      https://developer.apple.com/library/safari/documentation/AudioVideo/Conceptual/HTML-canvas-guide/AddingMouseandTouchControlstoCanvas/AddingMouseandTouchControlstoCanvas.html
      *
      * makes it sound simple, but it turns out we have to walk the canvas' entire "parentage" of DOM elements
@@ -2203,7 +2203,7 @@ Video.prototype.processTouchEvent = function(event, fStart)
 
 /**
  * powerUp(data, fRepower)
- * 
+ *
  * @this {Video}
  * @param {Object|null} data
  * @param {boolean} [fRepower]
@@ -2223,10 +2223,10 @@ Video.prototype.powerUp = function(data, fRepower)
 
 /**
  * powerDown(fSave)
- * 
+ *
  * This is where we might add some method of blanking the display, without the disturbing the video
  * buffer contents, and blocking all further updates to the display.
- * 
+ *
  * @this {Video}
  * @param {boolean} fSave
  * @return {Object|boolean}
@@ -2238,14 +2238,14 @@ Video.prototype.powerDown = function(fSave)
 
 /**
  * reset()
- * 
+ *
  * @this {Video}
  */
 Video.prototype.reset = function()
 {
     var fRandomize = true;
     var nMonitorType = ChipSet.MONITOR.NONE;
-    
+
     /*
      * We'll ask the ChipSet what SW1 indicates for monitor type, but we may override it if a specific
      * video card model is set.  For EGA, SW1 is supposed to be set to indicate NO monitor, and we rely
@@ -2302,7 +2302,7 @@ Video.prototype.reset = function()
      * We need to call buildFonts() *after* the card(s) are initialized but *before* setMode() is called.
      */
     this.buildFonts();
-    
+
     this.nMode = null;
     this.nModeDefault = (nMonitorType == ChipSet.MONITOR.MONO? Video.MODES.MDA_80X25 : Video.MODES.CGA_80X25);
 
@@ -2318,18 +2318,18 @@ Video.prototype.reset = function()
          * as a way of testing whether our font(s) were successfully loaded.  It's assumed
          * that our default display mode is a text mode, and that since this is a reset,
          * the CRTC.START_ADDR registers are zero as well.
-         * 
+         *
          * If this is an MDA device, then the buffer should reside at 0xB0000 through 0xB0FFF,
          * for a total length of 4Kb (0x1000), where every even byte contains a character code,
          * and every odd byte contains an attribute code.  See the ATTR bit definitions above for
          * applicable color, intensity, and blink values.  On a CGA device, the buffer resides
          * at 0xB8000 through 0xBBFFF, for a total length of 16Kb.
-         *      
+         *
          * Note that the only valid MDA display mode (7) is the 80x25 text mode, which uses 4000
          * bytes (2000 character bytes + 2000 attribute bytes), not all 4096 bytes; addrScreenLimit
          * reflects the visible limit, not the physical limit.  Also, as noted in updateScreen(),
          * this simplistic calculation of the extent of visible screen memory is valid only for
-         * text modes; in general, it's safer to use cardActive.sizeBuffer as the extent.  
+         * text modes; in general, it's safer to use cardActive.sizeBuffer as the extent.
          */
         var addrScreenLimit = this.cardActive.addrBuffer + this.cbScreen;
         for (var addrScreen = this.cardActive.addrBuffer; addrScreen < addrScreenLimit; addrScreen += 2) {
@@ -2365,7 +2365,7 @@ Video.prototype.enableEGA = function()
 {
     if (!(this.cardEGA.miscReg & Card.MISC.IO_SELECT)) {
         this.cardMono = this.cardEGA;
-        this.cardColor = this.cardCGA;  // this is done mainly to siphon away any CGA I/O 
+        this.cardColor = this.cardCGA;  // this is done mainly to siphon away any CGA I/O
     } else {
         this.cardMono = this.cardMDA;   // similarly, this is done to siphon away any MDA I/O
         this.cardColor = this.cardEGA;
@@ -2374,9 +2374,9 @@ Video.prototype.enableEGA = function()
 
 /**
  * save()
- * 
+ *
  * This implements save support for the Video component.
- * 
+ *
  * @this {Video}
  * @return {Object}
  */
@@ -2392,9 +2392,9 @@ Video.prototype.save = function()
 
 /**
  * restore(data)
- * 
+ *
  * This implements restore support for the Video component.
- * 
+ *
  * @this {Video}
  * @param {Object} data
  * @return {boolean} true if successful, false if failure
@@ -2409,7 +2409,7 @@ Video.prototype.restore = function(data)
     this.cardActive = null;
     this.cardMono = this.cardMDA = new Card(this, Video.CARDS.MDA, data[0]);
     this.cardColor = this.cardCGA = new Card(this, Video.CARDS.CGA, data[1]);
-    
+
     /*
      * If no EGA was originally initialized, then cardEGA will remain uninitialized.
      */
@@ -2426,10 +2426,10 @@ Video.prototype.restore = function(data)
      * setMode() will also take care of mapping the appropriate video buffer.  So, after restore() has
      * finished, we call checkMode(), because the current video mode (nMode) is determined by the
      * active card state.
-     * 
+     *
      * Unfortunately, that creates a chicken-and-egg problem, since I just said I didn't want to select
      * the active card here.
-     * 
+     *
      * So, we'll add some "cop-out" code to checkMode(): if there's no active card, then fall-back
      * to the last known video mode (nMode) and force a call to setMode().
      *
@@ -2476,7 +2476,7 @@ Video.prototype.onLoadSetFonts = function(sFontFile, sFontData, nErrorCode)
         if (abFontData.length == 8192) {
             /*
              * Here are the first few rows of MDA font data, at the 0K and 2K boundaries:
-             * 
+             *
              *      00000000  00 00 00 00 00 00 00 00  00 00 7e 81 a5 81 81 bd  |..........~.....|
              *      00000010  00 00 7e ff db ff ff c3  00 00 00 36 7f 7f 7f 7f  |..~........6....|
              *      ...
@@ -2485,7 +2485,7 @@ Video.prototype.onLoadSetFonts = function(sFontFile, sFontData, nErrorCode)
              *
              * 8 bytes of data from a row in each of the 2K chunks are combined to form a 8-bit wide character with
              * a maximum height of 16 bits.  Assembling the bits for character 0x01 (a happy face), we observe the following:
-             * 
+             *
              *      0 0 0 0 0 0 0 0  <== 00 from offset 0x0008
              *      0 0 0 0 0 0 0 0  <== 00 from offset 0x0009
              *      0 1 1 1 1 1 1 0  <== 7e from offset 0x000A
@@ -2505,24 +2505,24 @@ Video.prototype.onLoadSetFonts = function(sFontFile, sFontData, nErrorCode)
              *
              *  In the second 2K chunk, we observe that the last two bytes of every font cell definition are zero;
              *  this confirms our understanding that MDA font cell size is 8x14.
-             *  
+             *
              *  Finally, there's the issue of screen cell size, which is actually 9x14 on the MDA.  We compensate for that
              *  by building a 9x14 font, even though there's only 8x14 bits of data. As http://www.seasip.info/VintagePC/mda.html
              *  explains:
-             *  
+             *
              *      "For characters C0h-DFh, the ninth pixel column is a duplicate of the eighth; for others, it's blank."
-             *      
+             *
              *  This last point is confirmed by "The IBM Personal Computer From The Inside Out", p.295:
-             *  
+             *
              *      "Another unique feature of the monochrome adapter is a set of line-drawing and area-fill characters that give
              *      continuous lines and filled areas. This is unusual for a display with a 9x14 character box because the character
              *      generator provides a row only eight dots wide. On most displays, a blank 9th dot is then inserted between characters.
              *      On the monochrome display, there is circuitry that duplicates the 8th dot into the 9th dot position for characters
              *      whose ASCII codes are 0xB0 through 0xDF."
-             *      
+             *
              *  The only question is: is the range actually 0xC0-0xDF, or 0xB0-0xDF???  I'll assume the latter, since 0xB0 is where
              *  the line-drawing/area-fill characters appear to begin.
-             *  
+             *
              *  The CGA font is part of the same ROM.  In fact, there are TWO CGA fonts in the ROM: a thin 5x7 "single dot" font
              *  located at offset 0x1000, and a thick 7x7 "double dot" font at offset 0x1800.  The latter is the default font,
              *  unless overridden by a jumper setting on the CGA card, so it is our default CGA font as well (although someday we
@@ -2591,7 +2591,7 @@ Video.prototype.onROMLoad = function(abROM)
 
 /**
  * getCardColors(nBitsPerPixel)
- * 
+ *
  * @param {number} [nBitsPerPixel]
  * @returns {Array}
  */
@@ -2605,22 +2605,22 @@ Video.prototype.getCardColors = function(nBitsPerPixel)
         this.aRGB[1] = Video.aCGAColors[Video.ATTRS.FGND_WHITE];
         return this.aRGB;
     }
-    
+
     if (nBitsPerPixel == 2) {
         /*
          * Of the 4 colors returned, the first color comes from colorReg and the other 3 come from one of
          * the two hard-coded CGA color sets:
-         * 
+         *
          *      Color Set 1             Color Set 2
          *      -----------             -----------
          *      Background (0x00)       Background (0x00)
          *      Green      (0x12)       Cyan       (0x13)
          *      Red        (0x14)       Magenta    (0x15)
          *      Brown      (0x16)       White      (0x17)
-         *      
+         *
          * The numbers in parentheses are the EGA ATC palette register values that the EGA BIOS uses for each
          * color set; on an EGA, I synthesize a fake CGA colorReg value, until I figure out exactly how the EGA
-         * simulates the CGA color palette.  TODO: Figure it out. 
+         * simulates the CGA color palette.  TODO: Figure it out.
          */
         var colorReg = this.cardActive.colorReg;
         if (this.cardActive === this.cardEGA) {
@@ -2636,7 +2636,7 @@ Video.prototype.getCardColors = function(nBitsPerPixel)
         }
         return this.aRGB;
     }
-    
+
     if (this.cardColor === this.cardCGA) {
         /*
          * There's no need to update this.aRGB if we simply want to return a hard-coded set of 16 colors.
@@ -2645,7 +2645,7 @@ Video.prototype.getCardColors = function(nBitsPerPixel)
     }
 
     Component.assert(this.cardColor === this.cardEGA);
-    
+
     var aRegs = (this.cardEGA.aATCRegs[15] != null? this.cardEGA.aATCRegs : Video.aEGAPalDef);
     for (var i = 0; i < this.aRGB.length; i++) {
         var b = aRegs[i] || 0;
@@ -2662,11 +2662,11 @@ Video.prototype.getCardColors = function(nBitsPerPixel)
  *
  * To support partial font rebuilds (required for the EGA), we now preserve the original font data (abFontData),
  * font offsets (aFontOffsets), and font character width (8 for the EGA, undefined for the MDA/CGA).
- * 
+ *
  * TODO: Ultimately, we want to have exactly one dedicated font for the EGA, the data for which we'll read directly
  * from plane 2 of video memory, instead of relying on the original font data in ROM.  Relying on the ROM data was
  * originally just a crutch to help get EGA support bootstrapped.
- * 
+ *
  * Also, for the MDA/CGA, we should be discarding the font data after the first buildFonts() call, because we
  * should not need to ever rebuild the fonts for those cards (both their font patterns and colors were hard-coded).
  *
@@ -2684,57 +2684,57 @@ Video.prototype.setFontData = function(abFontData, aFontOffsets, cxFontChar)
 
 /**
  * buildFonts()
- * 
+ *
  * buildFonts() is called whenever the Video component is reset or restored; we used to build the fonts as soon
  * as the ROM containing them was loaded, and then throw away the underlying font data, but with the EGA's ability
  * to change the color of any font, font building must now be deferred until the reset or restore notifications,
  * ensuring we have access to all the colors the card is currently programmed to use.
- * 
+ *
  * We're also called whenever EGA palette registers are modified, since one or more fonts will likely need
  * to be rebuilt (this is because our fonts contain pre-rendered images of all glyphs for all 16 active colors).
  * Calls to buildFonts() should not be expensive though: the underlying createFont() function rebuilds a font only
  * if its color has actually changed.
- * 
+ *
  * TODO: We should avoid rebuilding fonts when palette registers change in graphics modes.  More importantly, our
  * font code is still written with the assumption that, like the MDA/CGA, the underlying font data never changes.
  * The EGA, however, stores its fonts in plane 2, which means fonts are dynamic; this needs to be fixed.
- * 
+ *
  * Supporting dynamic EGA fonts should not be hard though.  We can get rid of abFontData and simply build a
  * temporary snapshot of all the font bytes in plane 2 of the EGA's video buffer (adwMemory), and pass that on to
  * buildFont() instead.  We'll also need to either invalidate the existing font's color (to trigger a rebuild) or
  * pass a new "force rebuild" flag.
- * 
+ *
  * Once that's done, an added benefit will be that we can build just the font(s) that have been loaded into plane 2,
  * instead of the multitude of fonts that we now build on a just-in-case basis (eg, the MDA font, the 8x8 CGA font
  * for 43-line mode, and so on).
- * 
+ *
  * @this {Video}
  * @return {boolean} true if any or all fonts were (re)built, false if nothing changed
  */
 Video.prototype.buildFonts = function()
 {
     var fChanges = false;
-    
+
     /*
      * There's no point building any fonts if (a) we're in a non-windowed (eg, command-line) environment or
      * (b) no font data was loaded.
      */
     if (window && this.abFontData) {
-        
+
         var offSplit = this.cxFontChar? 0 : 0x0800;
         var cxChar = this.cxFontChar? this.cxFontChar : 9;
-        
+
         if (this.buildFont(Video.FONTS.MDA, this.aFontOffsets[0], offSplit, cxChar, 14, this.abFontData, Video.aMDAColors, Video.aMDAColorMap)) {
             fChanges = true;
         }
-        
+
         var aRGBColors = this.getCardColors();
         offSplit = 0x0000;
         cxChar = this.cxFontChar? this.cxFontChar : 8;
         if (this.buildFont(Video.FONTS.CGA, this.aFontOffsets[1], offSplit, cxChar, 8, this.abFontData, aRGBColors)) {
             fChanges = true;
         }
-        
+
         if (this.cxFontChar) {
             if (this.buildFont(Video.FONTS.EGA, this.aFontOffsets[0], 0, this.cxFontChar, 14, this.abFontData, aRGBColors)) {
                 fChanges = true;
@@ -2748,7 +2748,7 @@ Video.prototype.buildFonts = function()
  * buildFont(nFont, offData, offSplit, cxChar, cyChar, abFontData, aRGBColors, aColorMap)
  *
  * This is a wrapper for createFont() which also takes care loading double-size fonts when fDoubleFont is set.
- * 
+ *
  * @this {Video}
  * @param {number} nFont
  * @param {number} offData is the offset of the font data
@@ -2848,17 +2848,17 @@ Video.prototype.createFontColor = function(font, iColor, rgbColor, nDouble, offD
     /*
      * Now we're ready to create a 16x16 character grid for the specified color.  Note that all
      * the character bits are opaque (alpha=0xff) while all the surrounding bits are transparent
-     * (alpha=0x00, as specified in the 4th byte of rgbOff). 
+     * (alpha=0x00, as specified in the 4th byte of rgbOff).
      *
      * Originally, I created 256 ImageData objects, using context.createImageData(cxChar,cyChar),
      * then setting its pixels to match those of an individual character, and then drawing characters
      * with contextFont.putImageData().  But putImageData() is relatively slow....
-     * 
+     *
      * Now I create a new canvas, with dimensions that allow me to arrange all 256 characters in an
      * 16x16 grid -- much like the "chargen.png" bitmap used in the C1Pjs version of the Video component.
      * Then drawing becomes much the same as before, because it turns out that drawImage() accepts either
      * an image object OR a canvas object.
-     * 
+     *
      * This also yields better performance, since drawImage() is much faster than putImageData().
      * We still have to use putImageData() to build the font canvas, but that's a one-time operation.
      */
@@ -2927,7 +2927,7 @@ Video.prototype.createFontColor = function(font, iColor, rgbColor, nDouble, offD
         this.contextScreen.drawImage(canvasFont, 0, iColor*(font.cyCell<<4), canvasFont.width>>2, font.cyCell<<4, iColor*(font.cxCell<<2), 0, canvasFont.width>>2, font.cyCell<<4);
     }
      */
-    
+
     font.aCanvas[iColor] = canvasFont;
 };
 
@@ -2968,15 +2968,15 @@ Video.prototype.checkBlink = function()
              * At this point, we can either fire up our own timer (doBlink), or rely on updateScreen()
              * being called by the CPU at a regular rate (eg, CPU.VIDEO_UPDATES_PER_SECOND = 60) and advance
              * cBlinks at the start of updateScreen() accordingly.
-             * 
+             *
              * doBlink() wants to increment cBlinks every 266ms.  On the other hand, if updateScreen() is being
              * called 60 times per second, that's about once every 16ms, so if every 16th updateScreen() increments
              * cBlinks, cBlinks should advance at the same rate.
-             * 
+             *
              * The only downside to relying on the CPU driving our blink count is that whenever the CPU is halted
              * (eg, by the PCjs debugger) all blinking stops -- all characters with the blink attribute AND the cursor.
-             * 
-             * But we can simply say that when we halt, we mean "halt everything" (ie, call it a feature). 
+             *
+             * But we can simply say that when we halt, we mean "halt everything" (ie, call it a feature).
              *
              *      this.doBlink(true);
              */
@@ -3008,7 +3008,7 @@ Video.prototype.checkBlink = function()
 Video.prototype.checkCursor = function()
 {
     /*
-     * The "hardware cursor" is never visible in graphics modes. 
+     * The "hardware cursor" is never visible in graphics modes.
      */
     if (!this.nFont) return false;
 
@@ -3036,7 +3036,7 @@ Video.prototype.checkCursor = function()
      * One way of disabling the cursor is to set bit 5 (Card.CRTC.CURSOR_START.BLINKOFF) of the CRTC.CURSOR_START flags;
      * another way is setting bCursorStart > bCursorEnd (unless it's an EGA, in which case we must actually draw a
      * "split block" cursor instead).
-     * 
+     *
      * TODO: Verify whether the second test (bCursorStart > bCursorMax) should also result in a hidden cursor;
      * ThinkTank sets both start and end values to 0x0f, which doesn't make sense on a CGA, where the max is 0x07.
      */
@@ -3058,7 +3058,7 @@ Video.prototype.checkCursor = function()
     /*
      * yCursor and cyCursor are no longer scaled at this point, because the necessary scaling will depend on whether we're
      * drawing the cursor to the on-screen or off-screen buffer, and updateChar() is in the best position to determine that.
-     * 
+     *
      * We also record cyCursorCell, the hardware cell height, since we'll need to know what the yCursor and cyCursor values
      * are relative to when it's time to scale them.
      */
@@ -3193,11 +3193,11 @@ Video.prototype.setAccess = function(nAccess)
 {
     var card = this.cardActive;
     if (nAccess != null && card && nAccess != card.nAccess) {
-        
+
         if (DEBUG) this.messageDebugger("setAccess(0x" + str.toHexWord(nAccess) + ")");
-        
+
         card.setMemoryAccess(nAccess);
-        
+
         /*
          * Note that setMemoryAccess() can fail, in which case it will an report error, indicating either a
          * misconfiguration or some sort of internal inconsistency; in any case, there's not much we can do about
@@ -3211,7 +3211,7 @@ Video.prototype.setAccess = function(nAccess)
 
 /**
  * setDimensions()
- * 
+ *
  * @this {Video}
  */
 Video.prototype.setDimensions = function()
@@ -3234,9 +3234,9 @@ Video.prototype.setDimensions = function()
              * When an EGA is connected to a CGA monitor, the old aModeParms table is correct: we must
              * use the hard-coded 8x8 "CGA_80" font.  But when it's connected to an EGA monitor, we want
              * to use the 9x14 "EGA" color font instead.
-             * 
+             *
              * TODO: Can an EGA with a monochrome monitor be programmed for 43-line mode as well?  If so,
-             * then we'll need to load another MDA font variation, because we only load an 9x14 font for MDA.  
+             * then we'll need to load another MDA font variation, because we only load an 9x14 font for MDA.
              */
             if (this.cardActive === this.cardEGA && this.nFont == Video.FONTS.CGA) {
                 if (this.cardEGA.aCRTCRegs[Card.CRTC.MAX_SCAN_LINE] == 7) {
@@ -3269,7 +3269,7 @@ Video.prototype.setDimensions = function()
      * If no fonts were successfully loaded, there's no point in initializing the remaining drawing parameters.
      */
     if (!this.aFonts.length) return;
-    
+
     this.cxScreenCell = Math.floor(this.cxScreen / this.nCols);
     this.cyScreenCell = Math.floor(this.cyScreen / this.nRows);
 
@@ -3279,17 +3279,17 @@ Video.prototype.setDimensions = function()
      * fScaleFont setting: if it's false, we draw the characters as-is, with a border if the characters
      * are smaller than the cells; and if fScaleFont is true, we simply tell drawImage to draw the
      * characters to fit.
-     * 
+     *
      * WARNING: The only problem with fScaleFont is that any stretching or shrinking tends to be accompanied
      * by subpixel artifacts along the boundaries of the font images.  Definitely annoying, and apparently
      * there are no standard mechanisms for turning that behavior off. So, for now, I've "neutered" the
      * fScaleFont test slightly, by adding the "nCols == 80" test that prevents scaling from kicking in for
      * 40-column modes.
-     * 
+     *
      * Also, whether scaling or not, if it makes sense to use a "doubled" font, we'll switch the font as
      * well.  Note that the doubled font for any existing font also has an ID that is double the existing ID,
      * making it easy to check for the existence of a font's "double" (shift the ID left by 1).
-     * 
+     *
      * TODO: Since we now use an off-screen buffer for ALL modes, both text and graphics, we should
      * revisit changes that were made to work around subpixel artifacts; those should no longer be an issue.
      */
@@ -3318,12 +3318,12 @@ Video.prototype.setDimensions = function()
                 this.cyScreenCell = font.cyCell;
             }
         }
-        
+
         /*
          * In text modes, we have the option of setting all the *ScreenBuffer variables to null instead of
          * allocating them, because updateChar(), as currently written, is capable of writing characters to
          * either an off-screen or on-screen context.
-         * 
+         *
          *      this.imageScreenBuffer = this.canvasScreenBuffer = this.contextScreenBuffer = null;
          */
         this.cxBuffer = this.cyBuffer = 0;
@@ -3336,10 +3336,10 @@ Video.prototype.setDimensions = function()
          * CGA graphics modes have their "cells" (pixels) split evenly across two halves of the video buffer, with
          * EVEN scan lines in the first half and ODD scan lines in the second half, so unlike text modes, we can't set a
          * limit of what's visible on-screen to "columns * rows", so the screen limit is set to match the buffer limit.
-         * 
+         *
          * In addition, updateScreen() requires an off-screen imageData buffer that matches the size of the entire screen,
          * so that updateScreen() can set all pixels that have changed and then update the screen with a single drawImage().
-         * 
+         *
          * An alternative approach, with a smaller footprint, would be to allocate an off-screen buffer large enough for a
          * single scan line, and redraw one scan line at a time, but given how EVEN and ODD scan lines are spread across the
          * entire buffer, it's not clear there would be enough unchanged scan lines on average to make that approach faster.
@@ -3366,7 +3366,7 @@ Video.prototype.setDimensions = function()
     this.xScreenOffset = this.yScreenOffset = 0;
     this.cxScreenOffset = this.cxScreen;
     this.cyScreenOffset = this.cyScreen;
-    
+
     var cxBorder = this.cxScreen - (this.nCols * this.cxScreenCell);
     var cyBorder = this.cyScreen - (this.nRows * this.cyScreenCell);
     if (cxBorder > 0) {
@@ -3417,7 +3417,7 @@ Video.prototype.checkMode = function(fForce)
              * The sizeBuffer we choose reflects the amount of physical address space that all 4 planes
              * of EGA memory normally span, NOT the total amount of EGA memory.  So for a 64Kb EGA card,
              * we would set card.sizeBuffer to 16Kb (0x4000).
-             * 
+             *
              * TODO: Need to take into account modes that "chain" planes together (eg, mode 0x0F, and
              * presumably mode 0x10, on an EGA card with only 64Kb).
              */
@@ -3484,7 +3484,7 @@ Video.prototype.checkMode = function(fForce)
             /*
              * NOTE: For the CGA, we precondition any mode change on CGA.MODE.VIDEO_ENABLE being set, otherwise
              * we'll get spoofed by the ROM BIOS scroll code, which waits for vertical retrace and then turns CGA.MODE.VIDEO_ENABLE
-             * off, using a hard-coded mode value (0x25) that does NOT necessarily match the the CGA video mode currently in effect.   
+             * off, using a hard-coded mode value (0x25) that does NOT necessarily match the the CGA video mode currently in effect.
              */
             if (!(card.modeReg & Card.CGA.MODE.GRAPHIC_SEL)) {
                 nMode = ((card.modeReg & Card.CGA.MODE._80X25)? Video.MODES.CGA_80X25 : Video.MODES.CGA_40X25);
@@ -3502,7 +3502,7 @@ Video.prototype.checkMode = function(fForce)
      * changes will be moot until the setAccess() call that follows.  Basically, whenever both memory mapping AND access
      * functions are changing, the memory will be in an inconsistent state until both setMode() and setAccess() are
      * finished.
-     * 
+     *
      * The setMode() call takes precedence; if we called setAccess() first, it might attempt to modify memory access
      * functions based on the card's addrBuffer setting, and if that doesn't match what's currently mapped, assertions
      * will be triggered (probably not fatal, but it would defeat the point of the assertions).
@@ -3516,10 +3516,10 @@ Video.prototype.checkMode = function(fForce)
 
 /**
  * setMode(nMode, fForce)
- * 
+ *
  * Set fForce to true to update the mode regardless of previous mode, or false to perform a normal update
  * that bypasses updateScreen() but still calls initCellCache().
- * 
+ *
  * @this {Video}
  * @param {number|null} nMode
  * @param {boolean|undefined} [fForce] is set when checkMode() wants to force a mode update
@@ -3528,29 +3528,29 @@ Video.prototype.checkMode = function(fForce)
 Video.prototype.setMode = function(nMode, fForce)
 {
     if (nMode != null && (nMode != this.nMode || fForce)) {
-        
+
         if (DEBUG) this.messageDebugger("setMode(0x" + str.toHexWord(nMode) + (fForce? ",force" : "") + ")");
-    
+
         this.cUpdates = 0;      // count updateScreen() calls as a means of driving blink updates
         this.nMode = nMode;
-    
+
         /*
          * On an EGA, it's CRITICAL that a reset() invalidate cardActive, to ensure that the code below
          * releases the previous frame buffer and installs a new one, even if there was no change in the
          * frame buffer address or size, because otherwise the Memory blocks installed at the frame buffer
          * address may still be using blocks of the EGA's previous memory buffer.
-         * 
+         *
          * When the EGA is reinitialized, a new memory buffer (adwMemory) is allocated (see initEGA()), and
          * this is where the mapping of that EGA memory buffer to the frame buffer occurs.  Other cards
          * (MDA or CGA) don't allocate/manage their own memory buffer, but even then, it's still a good idea
          * to always force this operation (eg, in case a switch setting changed the active video card).
          */
         var card = this.cardActive || (nMode == Video.MODES.MDA_80X25? this.cardMono : this.cardColor);
-        
+
         if (card != this.cardActive || card.addrBuffer != this.addrBuffer || card.sizeBuffer != this.sizeBuffer) {
-            
+
             this.removeCursor();
-            
+
             if (this.addrBuffer) {
                 if (!this.bus.removeMemory(this.addrBuffer, this.sizeBuffer)) {
                     /*
@@ -3560,13 +3560,13 @@ Video.prototype.setMode = function(nMode, fForce)
                 }
                 if (this.cardActive) this.cardActive.fActive = false;
             }
-            
+
             this.cardActive = card;
             card.fActive = true;
-            
+
             this.addrBuffer = card.addrBuffer;
             this.sizeBuffer = card.sizeBuffer;
-            
+
             var controller = (card === this.cardEGA? card : null);
             if (!this.bus.addMemory(card.addrBuffer, card.sizeBuffer, false, controller)) {
                 /*
@@ -3575,9 +3575,9 @@ Video.prototype.setMode = function(nMode, fForce)
                 return false;
             }
         }
-        
+
         this.setDimensions();
-        
+
         if (fForce !== false) {
             this.updateScreen(true);
         } else {
@@ -3589,7 +3589,7 @@ Video.prototype.setMode = function(nMode, fForce)
 
 /**
  * setPixel(imageData, x, y, rgb)
- * 
+ *
  * Worker function used by createFontColor() and updateScreen() (graphics modes only).
  *
  * @this {Video}
@@ -3609,7 +3609,7 @@ Video.prototype.setPixel = function(imageData, x, y, rgb)
 
 /**
  * initCellCache(fNew)
- * 
+ *
  * Invalidates the contents of our internal cell cache.
  *
  * @this {Video}
@@ -3631,16 +3631,16 @@ Video.prototype.initCellCache = function(fNew)
     for (var iCell = 0; iCell < nCells; iCell++) {
         this.aCellCache[iCell] = -1;        // invalidate every cell of our internal cell cache (-1 is an invalid cell value)
     }
-    this.cBlinkVisible = -1;                // also invalidate the visible blinking character count, to force updateScreen() to recount  
+    this.cBlinkVisible = -1;                // also invalidate the visible blinking character count, to force updateScreen() to recount
 };
 
 /**
  * doBlink()
- * 
+ *
  * This function is obsolete, now that the checkBlink() function is called on every updateScreen()
  * and checkCursor() call.  updateScreen() is driven by the CPU timer, so piggy-backing on that to
- * drive blink updates seems preferable to having another active timer in the system. 
- * 
+ * drive blink updates seems preferable to having another active timer in the system.
+ *
  * @this {Video}
  * @param {boolean} [fStart]
  *
@@ -3686,7 +3686,7 @@ Video.prototype.initCellCache = function(fNew)
 Video.prototype.updateChar = function(col, row, data, context)
 {
     /*
-     * The caller MUST promise this.nFont is defined, and that the font in this.aFonts[this.nFont] has been loaded. 
+     * The caller MUST promise this.nFont is defined, and that the font in this.aFonts[this.nFont] has been loaded.
      */
     var bChar = data & 0xff;
     var bAttr = data >> 8;
@@ -3748,12 +3748,12 @@ Video.prototype.updateChar = function(col, row, data, context)
          *      this.contextScreen.moveTo(xDst, yDst + this.yCursor);
          *      this.contextScreen.lineTo(xDst + this.cxScreenCell, yDst + this.yCursor);
          *      this.contextScreen.stroke();
-         *      
+         *
          * Also, note that we're scaling the yCursor and cyCursor values here, instead of in checkCursor(), because
          * this is where we have all the required information: in the first case (off-screen buffer), the scaling must
          * be based on the font cell size (cxCell, cyCell), whereas in the second case (on-screen buffer), the scaling
          * must be based on the screen cell size (cxScreenCell,cyScreenCell).
-         * 
+         *
          * yCursor and cyCursor are actual hardware values, both relative to another hardware value: cyCursorCell.
          */
         var yCursor = this.yCursor;
@@ -3778,7 +3778,7 @@ Video.prototype.updateChar = function(col, row, data, context)
 
 /**
  * updateScreen(fForce)
- * 
+ *
  * Propagates the video buffer to the cell cache and updates the window with any changes.  Forced updates
  * are generally internal updates triggered by an I/O operation or other state change, while non-forced updates
  * are the periodic updates coming from the CPU.
@@ -3796,7 +3796,7 @@ Video.prototype.updateScreen = function(fForce)
      * The Computer component maintains an fPowered setting on our behalf, so we use it.
      */
     if (!this.fPowered) return;
-    
+
     /*
      * If the card's video signal is disabled (eg, during a mode change), then skip the update,
      * unless fForce is set.
@@ -3810,9 +3810,9 @@ Video.prototype.updateScreen = function(fForce)
             if (this.cardActive.modeReg & Card.CGA.MODE.VIDEO_ENABLE) fEnabled = true;
         }
     }
-    
+
     if (!fEnabled && !fForce) return;
-    
+
     if (fForce) {
         this.initCellCache(true);
     }
@@ -3827,7 +3827,7 @@ Video.prototype.updateScreen = function(fForce)
     /*
      * If cBlinks is "enabled" (ie, >= 0), then advance it once every 16 updateScreen() calls
      * (assuming an updateScreen() frequency of 60 per second; see CPU.VIDEO_UPDATES_PER_SECOND).
-     * 
+     *
      * We assume that the CPU is calling us whenever fForce is undefined.
      */
     var fBlinkUpdate = false;
@@ -3843,19 +3843,19 @@ Video.prototype.updateScreen = function(fForce)
      * Calculate the VISIBLE start of screen memory (addrScreen), not merely the PHYSICAL start,
      * as well as the extent of it (cbScreen) and use those values for all addressing operations
      * to follow.  FYI, in these calculations, offScreen does not refer to "off-screen" memory,
-     * but rather the "offset" of the start of visible screen memory. 
+     * but rather the "offset" of the start of visible screen memory.
      */
     var addrScreen = this.cardActive.addrBuffer;
     var addrScreenLimit = addrScreen + this.cardActive.sizeBuffer;
     var offScreen = (this.cardActive.aCRTCRegs[Card.CRTC.START_ADDR_HI] << 8) + this.cardActive.aCRTCRegs[Card.CRTC.START_ADDR_LO];
-    
+
     /*
      * Any screen (aka "page") offset must be doubled for text modes, due to the attribute bytes.
      *
      * TODO: Come up with a more robust method of deciding when any screen offset should be doubled.
      */
     if (this.nFont) offScreen <<= 1;
-    
+
     addrScreen += offScreen;
     var cbScreen = this.cbScreen;
     if (addrScreen + cbScreen > addrScreenLimit) {
@@ -3876,7 +3876,7 @@ Video.prototype.updateScreen = function(fForce)
      * AND there are no visible blinking characters (as of the last updateScreen) AND there is
      * no visible cursor, then we're done; simply return.  Otherwise, if there's only a blinking
      * cursor, then update JUST that one cell.
-     * 
+     *
      * When dealing with blinking characters, note that we need to run through the entire buffer
      * ONLY if the low bits of the blink count just transitioned to 2 or 0; hence, we could return if
      * the blink count was ODD.  But we'd still have to worry about the cursor, so it's simpler to blow
@@ -3893,7 +3893,7 @@ Video.prototype.updateScreen = function(fForce)
         }
         // else if (this.cBlinks & 0x1) return;
     }
-    
+
     if (this.nFont) {
         /*
          * This is the text-mode update case.  We're required to FIRST verify that the current font
@@ -3914,7 +3914,7 @@ Video.prototype.updateScreen = function(fForce)
 
 /**
  * updateScreenText(addrScreen, addrScreenLimit, iCell, nCells)
- * 
+ *
  * @param addrScreen
  * @param addrScreenLimit
  * @param iCell
@@ -3923,14 +3923,14 @@ Video.prototype.updateScreen = function(fForce)
 Video.prototype.updateScreenText = function(addrScreen, addrScreenLimit, iCell, nCells)
 {
     var addr, data, dataCache, cUpdated = 0;
-    
+
     /*
      * If MDA.MODE.BLINK_ENABLE is set and a cell's blink bit is set, then if (cBlinks & 0x2) != 0,
      * we want the foreground element of the cell to be drawn; otherwise we don't.  So every 16-bit
      * data word we pull from the video buffer will be supplemented with our own special attribute bit
      * (ATTRS.DRAW_FGND = 0x100) accordingly; and to simplify the drawing code, we will also mask the
      * blink bit from the cell's attribute bits.
-     * 
+     *
      * If MDA.MODE.BLINK_ENABLE is clear, then we always set ATTRS.DRAW_FGND and never mask the blink
      * bit in a cell's attributes bits, since it's actually an intensity bit in that case.
      */
@@ -3973,7 +3973,7 @@ Video.prototype.updateScreenText = function(addrScreen, addrScreenLimit, iCell,
 
 /**
  * updateScreenGraphicsCGA(addrScreen, addrScreenLimit)
- * 
+ *
  * @param addrScreen
  * @param addrScreenLimit
  */
@@ -3990,7 +3990,7 @@ Video.prototype.updateScreenGraphicsCGA = function(addrScreen, addrScreenLimit)
     var wPixelMask = (nPixelsPerCell == 16? 0x10000 : 0x30000);
     var nPixelShift = (nPixelsPerCell == 16? 1 : 2);
     var aPixelColors = this.getCardColors(nPixelShift);
-    
+
     var x = 0, y = 0;
     var xDirty = this.nCols, xMaxDirty = 0, yDirty = this.nRows, yMaxDirty = 0;
     while (addr < addrScreenLimit) {
@@ -4068,7 +4068,7 @@ Video.prototype.updateScreenGraphicsEGA = function(addrScreen, addrScreenLimit)
     var iCell = 0, nPixelsPerCell = 8;
     var aPixelColors = this.getCardColors();
     var adwMemory = this.cardActive.adwMemory;
-    
+
     var x = 0, y = 0;
     var xDirty = this.nCols, xMaxDirty = 0, yDirty = this.nRows, yMaxDirty = 0;
     while (addr < addrScreenLimit) {
@@ -4116,7 +4116,7 @@ Video.prototype.updateScreenGraphicsEGA = function(addrScreen, addrScreenLimit)
         }
     }
     /*
-     * For a fascinating discussion of the best way to update the screen canvas at this point, see updateScreenGraphicsCGA(). 
+     * For a fascinating discussion of the best way to update the screen canvas at this point, see updateScreenGraphicsCGA().
      */
     if (xDirty < this.nCols) {
         var cxDirty = xMaxDirty - xDirty;
@@ -4297,7 +4297,7 @@ Video.prototype.inStatus0 = function(port, addrFrom)
     var iBit = 3 - ((this.cardEGA.miscReg & Card.MISC.CLK_SELECT) >> 2);    // this is the desired SW # (0-3)
     var bSWBit = (this.bEGASW & (1 << iBit)) << (Card.STATUS0.SWSENSE_SHIFT - iBit);
     var b = ((this.cardEGA.status0 & ~Card.STATUS0.SWSENSE) | bSWBit);
-    /* 
+    /*
      * TODO: Figure out where Card.STATUS0.FEAT bits should come from....
      */
     this.cardEGA.status0 = b;
@@ -4529,7 +4529,7 @@ Video.prototype.outGRCData = function(port, bOut, addrFrom)
         break;
     case Card.GRC.MISC.INDX:
         this.checkMode(false);
-        break;  
+        break;
     case Card.GRC.COLRDC.INDX:
         this.cardEGA.nColorDontCare = Video.aEGAByteToDW[(bOut & 0xf) ^ 0xf] & 0x80808080;
         break;
@@ -4733,7 +4733,7 @@ Video.prototype.outCRTCData = function(card, bOut, addrFrom)
          * During mode changes on the EGA, all the CRTC regs are typically programmed in sequence,
          * and if that's all that's happening with Card.CRTC.MAX_SCAN_LINE, then we don't want to treat
          * it special; let the mode change be detected normally (eg, when the GRC regs are written later).
-         * 
+         *
          * On the other hand, if this was an out-of-sequence write to Card.CRTC.MAX_SCAN_LINE, then
          * yes, we want to force setMode() to call setDimensions(), which is key to setting the proper
          * number of screen rows.
@@ -4819,26 +4819,26 @@ Video.prototype.inCardStatus = function(card, addrFrom)
     if (card === this.cardEGA) {
         /*
          * STATUS1 diagnostic bits 5 and 4 are set according to the Card.ATC.PLANES.MUX bits:
-         * 
+         *
          *      MUX     Bit 5   Bit 4
          *      ---     ----    ----
          *      00:     Red     Blue
          *      01:     SecBlue Green
          *      10:     SecRed  SecGreen
          *      11:     unused  unused
-         *      
+         *
          * Depending on where we are in the horizontal and vertical periods (which can be inferred from the
          * same elapsed cycle count that we used to simulate the retrace bits above), we could extract 4 bits
          * from a corresponding region of the video buffer, "and" them with Card.ATC.PLANES.MASK, use
          * that to index into the palette registers (cardEGA.aATCRegs), and use the resulting palette register
          * bits to set these diagnostics bits.  However, that's all rather tedious, and the process of extracting
          * 4 appropriate bits from the video buffer varies depending on the video mode.
-         * 
+         *
          * Why are we even considering this?  Because the EGA BIOS diagnostic code draws a bright reverse-video
          * line of text blocks across the top of the screen, writes 0x3F to palette register 0x0f, and then
          * monitors the STATUS1 diagnostic bits, waiting for those palette bits to show up.  It turns out, however,
          * that we can easily fool the EGA BIOS by simply toggling the diagnostic bits.  So we take the easy way out.
-         * 
+         *
          * TODO: Faithful emulation of these bits is certainly doable, so consider doing it at some point.
          */
         b |= ((card.statusReg & Card.STATUS1.DIAGNOSTIC) ^ Card.STATUS1.DIAGNOSTIC);
@@ -4852,7 +4852,7 @@ Video.prototype.inCardStatus = function(card, addrFrom)
         /*
          * On the MDA/CGA, to satisfy ROM BIOS testing ("TEST.10"), it's sufficient to do a simple toggle of
          * bits 0 and 3 on every read.
-         * 
+         *
          * Also, according to http://www.seasip.info/VintagePC/mda.html, on an MDA, bits 7-4 are always ON and bits 2-1
          * are always OFF, hence the "OR" of 0xf0.
          */
@@ -4889,7 +4889,7 @@ Video.prototype.dumpVideo = function(sParm)
  * messageDebugger(sMessage)
  *
  * This is a combination of the Debugger's messageEnabled(MESSAGE_VIDEO) and message() functions, for convenience.
- * 
+ *
  * @this {Video}
  * @param {boolean} [fForce] to display the message regardless of the MESSAGE_VIDEO setting, provided the Debugger is loaded
  * @param {string} sMessage is any caller-defined message string
@@ -4907,7 +4907,7 @@ Video.prototype.messageDebugger = function(sMessage, fForce)
  * messagePort(port, bOut, addrFrom, name, bIn)
  *
  * This is an internal version of the Debugger's messagePort() function, for convenience.
- * 
+ *
  * @this {Video}
  * @param {number} port
  * @param {number|null} bOut if an output operation
@@ -4924,7 +4924,7 @@ Video.prototype.messagePort = function(port, bOut, addrFrom, name, bIn)
 
 /*
  * Port input/output notification tables
- * 
+ *
  * TODO: I added some "duplicate" entries for the MDA because, according to docs I'd read, MDA ports are
  * decoded at multiple addresses.  However, if this is important, then it should be verified and implemented
  * consistently (eg, for CGA as well).  For now, I'm decoding only the standard port addresses.
@@ -4975,7 +4975,7 @@ Video.aEGAPortInput = {
 Video.aEGAPortOutput = {
     0x3BA: Video.prototype.outFeat,
     0x3C0: Video.prototype.outATC,
-    0x3C1: Video.prototype.outATC,              // the EGA BIOS writes to this port (see C000:0416), implying that 0x3C0 and 0x3C1 both decode the same register 
+    0x3C1: Video.prototype.outATC,              // the EGA BIOS writes to this port (see C000:0416), implying that 0x3C0 and 0x3C1 both decode the same register
     0x3C2: Video.prototype.outMisc,             // FYI, since this overlaps with STATUS0.PORT, there's currently no way for the Debugger to read the Misc register
     0x3C4: Video.prototype.outSEQIndx,
     0x3C5: Video.prototype.outSEQData,
@@ -5002,17 +5002,17 @@ Video.init = function()
     for (var iVideo = 0; iVideo < aeVideo.length; iVideo++) {
         var eVideo = aeVideo[iVideo];
         var parmsVideo = Component.getComponentParms(eVideo);
-        
+
         var eCanvas = window.document.createElement("canvas");
         if (eCanvas === undefined) {
             eVideo.innerHTML = "
Missing <canvas> support; try a new web browser.";
             return;
         }
-        
+
         eCanvas.setAttribute("class", PCJSCLASS + "-canvas");
         eCanvas.setAttribute("width", parmsVideo['screenWidth']);
         eCanvas.setAttribute("height", parmsVideo['screenHeight']);
-        
+
         /*
          * As noted in keyboard.js, the keyboard on an iOS device pops up with the SHIFT key depressed,
          * which is not the initial keyboard state that the Keyboard component expects. I originally tried
@@ -5029,12 +5029,12 @@ Video.init = function()
          * HACK: A canvas style of "auto" provides for excellent responsive canvas scaling in EVERY browser
          * except IE9/IE10, so I recalculate the appropriate CSS height every time the parent DIV is resized;
          * IE11 works without this hack, so we take advantage of the fact that IE11 doesn't report itself as "MSIE".
-         * 
+         *
          * Also, make sure the parent DIV also has a style of "auto"; normally, it has no explicit height, but
          * sometimes we'll preset it to a height (eg, "350px") for design purposes.
          */
         eCanvas.style.height = eVideo.style.height = "auto";
-        
+
         if (web.getUserAgent().indexOf("MSIE") >= 0) {
             eCanvas.style.height = (((eVideo.clientWidth * parmsVideo['screenHeight']) / parmsVideo['screenWidth']) | 0) + "px";
             eVideo.onresize = function(eParent, eChild, cx, cy) {
@@ -5044,23 +5044,23 @@ Video.init = function()
             }(eVideo, eCanvas, parmsVideo['screenWidth'], parmsVideo['screenHeight']);      // jshint ignore:line
         }
         eVideo.appendChild(eCanvas);
-        
+
         /*
          * HACK: Android-based browsers (eg, the Kindle Fire browser, the Chrome browser) don't honor the
          * "contenteditable" attribute; that is, when the canvas receives focus, they don't activate the on-screen
          * keyboard.  So my fallback is to create a transparent textarea on top of the canvas.
-         * 
+         *
          * We depend upon the containing DIV (and/or its parent DIV) to have a style of "position:relative" (which
          * all elements of class "pcjs-container" should have) so that we can position the textarea using absolute
          * coordinates.  Also, we don't want the textarea to be visible, but we must use "opacity:0" instead of
          * "visibility:hidden", because the latter prevents the element from receiving events.
-         * 
+         *
          * UPDATE: Unfortunately, Android keyboards like to compose whole words before transmitting any of the
          * intervening characters; our textarea's keyDown/keyUp event handlers DO receive intervening key events,
          * but their keyCode and charCode properties are ZERO.  Virtually the only usable key event we receive is
          * the Enter key, which makes this hack useless.  Android users will have to use machines that display
          * their own on-screen keyboard, or use an external keyboard.
-         * 
+         *
          * See this Chromium issue for more information: https://code.google.com/p/chromium/issues/detail?id=118639
          *
         var eTextArea = window.document.createElement("textarea");
@@ -5069,13 +5069,13 @@ Video.init = function()
          *
          * The following test failed as well.  You can clearly see the overlaid semi-transparent password-enabled
          * input field, but none of the input characters are passed along, with the exception of the "Go" (Enter) key.
-         * 
+         *
         var eInput = window.document.createElement("input");
         eInput.setAttribute("type", "password");
         eInput.setAttribute("style", "position:absolute; left:0; top:0; width:100%; height:100%; opacity:0.5");
         eVideo.appendChild(eInput);
          */
-        
+
         /*
          * Now we can create the Video object, record it, and wire it up to the associated document elements.
          */
@@ -5084,7 +5084,7 @@ Video.init = function()
 
         /*
          * Bind any video-specific controls (eg, the Refresh button). There are no essential controls, however;
-         * even the "Refresh" button is just a diagnostic tool, to ensure that the screen contents are up-to-date. 
+         * even the "Refresh" button is just a diagnostic tool, to ensure that the screen contents are up-to-date.
          */
         Component.bindComponentControls(video, eVideo, PCJSCLASS);
     }
diff --git a/my_modules/pcjs-client/lib/x86cpu.js b/my_modules/pcjs-client/lib/x86cpu.js
index d5f710425..4facf0e0e 100644
--- a/my_modules/pcjs-client/lib/x86cpu.js
+++ b/my_modules/pcjs-client/lib/x86cpu.js
@@ -34,19 +34,19 @@
 "use strict";
 
 if (typeof module !== 'undefined') {
-    var str = require("../../shared/lib/strlib");
-    var web = require("../../shared/lib/weblib");
-    var Component = require("../../shared/lib/component");
-    var Bus = require("./bus");
-    var State = require("./state");
-    var CPU = require("./cpu");
-    var X86 = require("./x86");
-    var X86Seg = require("./x86seg");
-    var X86Grps = require("./x86grps");
-    var X86Help = require("./x86help");
-    var X86Mods = require("./x86mods");
-    var X86OpXX = require("./x86opxx");
-    var X86Op0F = require("./x86op0f");
+    var str         = require("../../shared/lib/strlib");
+    var web         = require("../../shared/lib/weblib");
+    var Component   = require("../../shared/lib/component");
+    var Bus         = require("./bus");
+    var State       = require("./state");
+    var CPU         = require("./cpu");
+    var X86         = require("./x86");
+    var X86Seg      = require("./x86seg");
+    var X86Grps     = require("./x86grps");
+    var X86Help     = require("./x86help");
+    var X86Mods     = require("./x86mods");
+    var X86OpXX     = require("./x86opxx");
+    var X86Op0F     = require("./x86op0f");
 }
 
 /**
diff --git a/my_modules/pcjs-client/lib/x86grps.js b/my_modules/pcjs-client/lib/x86grps.js
index 68e40f246..fd122ca27 100644
--- a/my_modules/pcjs-client/lib/x86grps.js
+++ b/my_modules/pcjs-client/lib/x86grps.js
@@ -34,9 +34,9 @@
 "use strict";
 
 if (typeof module !== 'undefined') {
-    var X86 = require("./x86");
-    var X86Help = require("./x86help");
-    var Debugger = require("./debugger");
+    var X86         = require("./x86");
+    var X86Help     = require("./x86help");
+    var Debugger    = require("./debugger");
 }
 
 var X86Grps = {
@@ -66,7 +66,7 @@ var X86Grps = {
     /**
      * NOTE: Notice that some of the simpler math functions could get away with updating resultSize before
      * the calculation, but here the calculation depends on the incoming carry value.
-     * 
+     *
      * @this {X86CPU}
      * @param {number} dst
      * @param {number} src
@@ -82,7 +82,7 @@ var X86Grps = {
     /**
      * NOTE: Notice that some of the simpler math functions could get away with updating resultSize before
      * the calculation, but here the calculation depends on the incoming carry value.
-     * 
+     *
      * @this {X86CPU}
      * @param {number} dst
      * @param {number} src
@@ -169,7 +169,7 @@ var X86Grps = {
     /**
      * NOTE: Notice that some of the simpler math functions could get away with updating resultSize before
      * the calculation, but here the calculation depends on the incoming carry value.
-     * 
+     *
      * @this {X86CPU}
      * @param {number} dst
      * @param {number} src
@@ -185,7 +185,7 @@ var X86Grps = {
     /**
      * NOTE: Notice that some of the simpler math functions could get away with updating resultSize before
      * the calculation, but here the calculation depends on the incoming carry value.
-     * 
+     *
      * @this {X86CPU}
      * @param {number} dst
      * @param {number} src
@@ -296,7 +296,7 @@ var X86Grps = {
      * operand size of the last operation.  And since only 2 of the 6 arithmetic flags need to change, that tips the scales
      * in favor of leaving resultSize alone.  However, the previous code that worked so hard to update resultSize is still
      * here, commented out; it works, but it's less efficient.
-     * 
+     *
      * @this {X86CPU}
      * @param {number} result (untruncated, so that we can inspect it for CARRY and OVERFLOW)
      * @param {number} size
@@ -497,7 +497,7 @@ var X86Grps = {
      * and/or code that depends on them, I'll continue setting PS_AF and PS_OF "normally".
      *
      * See also: AND, OR, TEST, and XOR (those instructions leave AUXCARRY "undefined" as well).
-     * 
+     *
      * @this {X86CPU}
      * @param {number} dst
      * @param {number} src (1 or CL, or an immediate byte for 80186/80188 and up)
@@ -522,7 +522,7 @@ var X86Grps = {
      * AUXCARRY (PS_AF), AUXCARRY isn't properly set on a real 8086/8088; its value is
      * documented as "undefined."  Similarly, OVERFLOW (PS_OF) is documented as "undefined"
      * for shifts > 1.  See opGrpSHLb() for more details.
-     * 
+     *
      * @this {X86CPU}
      * @param {number} dst
      * @param {number} src (1 or CL, or an immediate byte for 80186/80188 and up)
@@ -547,7 +547,7 @@ var X86Grps = {
      * AUXCARRY (PS_AF), AUXCARRY isn't properly set on a real 8086/8088; its value is
      * documented as "undefined."  Similarly, OVERFLOW (PS_OF) is documented as "undefined"
      * for shifts > 1.  See opGrpSHLb() for more details.
-     * 
+     *
      * @this {X86CPU}
      * @param {number} dst
      * @param {number} src (1 or CL, or an immediate byte for 80186/80188 and up)
@@ -572,7 +572,7 @@ var X86Grps = {
      * AUXCARRY (PS_AF), AUXCARRY isn't properly set on a real 8086/8088; its value is
      * documented as "undefined."  Similarly, OVERFLOW (PS_OF) is documented as "undefined"
      * for shifts > 1.  See opGrpSHLb() for more details.
-     * 
+     *
      * @this {X86CPU}
      * @param {number} dst
      * @param {number} src (1 or CL, or an immediate byte for 80186/80188 and up)
@@ -597,7 +597,7 @@ var X86Grps = {
      * AUXCARRY (PS_AF), AUXCARRY isn't properly set on a real 8086/8088; its value is
      * documented as "undefined."  Similarly, OVERFLOW (PS_OF) is documented as "undefined"
      * for shifts > 1.  See opGrpSHLb() for more details.
-     * 
+     *
      * @this {X86CPU}
      * @param {number} dst
      * @param {number} src (1 or CL, or an immediate byte for 80186/80188 and up)
@@ -623,7 +623,7 @@ var X86Grps = {
      * AUXCARRY (PS_AF), AUXCARRY isn't properly set on a real 8086/8088; its value is
      * documented as "undefined."  Similarly, OVERFLOW (PS_OF) is documented as "undefined"
      * for shifts > 1.  See opGrpSHLb() for more details.
-     * 
+     *
      * @this {X86CPU}
      * @param {number} dst
      * @param {number} src (1 or CL, or an immediate byte for 80186/80188 and up)
@@ -739,7 +739,7 @@ var X86Grps = {
         }
         /*
          * Multiply/divide instructions specify only a single operand, which the decoders pass to us
-         * via the dst parameter, so we set src to the other implied operand (either AX or DX:AX). 
+         * via the dst parameter, so we set src to the other implied operand (either AX or DX:AX).
          * However, src is technically an output, and dst is merely an input (which is why we must return
          * dst unchanged). So, to make traceLog() more consistent, we reverse the order of dst and src.
          */
@@ -783,7 +783,7 @@ var X86Grps = {
         }
         /*
          * Multiply/divide instructions specify only a single operand, which the decoders pass to us
-         * via the dst parameter, so we set src to the other implied operand (either AX or DX:AX). 
+         * via the dst parameter, so we set src to the other implied operand (either AX or DX:AX).
          * However, src is technically an output, and dst is merely an input (which is why we must return
          * dst unchanged). So, to make traceLog() more consistent, we reverse the order of dst and src.
          */
@@ -822,7 +822,7 @@ var X86Grps = {
         this.resultSize = X86.RESULT.SIZE_BYTE;
         /*
          * Multiply/divide instructions specify only a single operand, which the decoders pass to us
-         * via the dst parameter, so we set src to the other implied operand (either AX or DX:AX). 
+         * via the dst parameter, so we set src to the other implied operand (either AX or DX:AX).
          * However, src is technically an output, and dst is merely an input (which is why we must return
          * dst unchanged). So, to make traceLog() more consistent, we reverse the order of dst and src.
          */
@@ -836,7 +836,7 @@ var X86Grps = {
      * @param {number} dst
      * @param {number} src (null)
      * @return {number} (we return dst unchanged, since it's actually AX that's modified)
-     * 
+     *
      * TODO: Implement the following difference, from "AP-186: Introduction to the 80186 Microprocessor, March 1983":
      *
      *      "The 8086 will cause a divide error whenever the absolute value of the quotient is greater then 7FFFH
@@ -869,7 +869,7 @@ var X86Grps = {
         this.resultSize = X86.RESULT.SIZE_BYTE;
         /*
          * Multiply/divide instructions specify only a single operand, which the decoders pass to us
-         * via the dst parameter, so we set src to the other implied operand (either AX or DX:AX). 
+         * via the dst parameter, so we set src to the other implied operand (either AX or DX:AX).
          * However, src is technically an output, and dst is merely an input (which is why we must return
          * dst unchanged). So, to make traceLog() more consistent, we reverse the order of dst and src.
          */
@@ -900,7 +900,7 @@ var X86Grps = {
         }
         /*
          * Multiply/divide instructions specify only a single operand, which the decoders pass to us
-         * via the dst parameter, so we set src to the other implied operand (either AX or DX:AX). 
+         * via the dst parameter, so we set src to the other implied operand (either AX or DX:AX).
          * However, src is technically an output, and dst is merely an input (which is why we must return
          * dst unchanged). So, to make traceLog() more consistent, we reverse the order of dst and src.
          */
@@ -914,15 +914,15 @@ var X86Grps = {
      * lower 16 bits (carry clear) and when the upper 16 bits contain significant bits (carry set).  The latter
      * will occur whenever a positive result is > 32767 (0x00007fff) and whenever a negative result is < -32768
      * (0xffff8000).
-     * 
+     *
      * Example 1: 256 * 64 = 16384 (0x00004000): carry is clear
      * Example 2: 256 * 128 = 32768 (0x00008000): carry is set (the sign bit no longer fits in the lower 16 bits)
      * Example 3: 256 * -128 (0xff80) = -32768 (0xffff8000): carry is clear (the sign bit *still* fits in the lower 16 bits)
      * Example 4: 256 * -256 (0xff00) = -65536 (0xffff0000): carry is set (the sign bit no longer fits in the lower 16 bits)
-     * 
+     *
      * An earlier version of this function assumed it simply needed to check bit 15 of the result to determine carry,
      * which was completely broken.
-     * 
+     *
      * @this {X86CPU}
      * @param {number} dst
      * @param {number} src (null)
@@ -945,7 +945,7 @@ var X86Grps = {
         }
         /*
          * Multiply/divide instructions specify only a single operand, which the decoders pass to us
-         * via the dst parameter, so we set src to the other implied operand (either AX or DX:AX). 
+         * via the dst parameter, so we set src to the other implied operand (either AX or DX:AX).
          * However, src is technically an output, and dst is merely an input (which is why we must return
          * dst unchanged). So, to make traceLog() more consistent, we reverse the order of dst and src.
          */
@@ -970,7 +970,7 @@ var X86Grps = {
         }
         /*
          * Detect small divisor (quotient overflow)
-         * 
+         *
          * WARNING: We CANNOT simply do "src = (this.regDX << 16) | this.regAX", because if bit 15 of DX
          * is set, JavaScript will create a negative 32-bit number.  So we instead use non-bit-wise operators
          * to force JavaScript to create a floating-point value that won't suffer from 32-bit-math side-effects.
@@ -990,7 +990,7 @@ var X86Grps = {
         this.resultSize = X86.RESULT.SIZE_WORD;
         /*
          * Multiply/divide instructions specify only a single operand, which the decoders pass to us
-         * via the dst parameter, so we set src to the other implied operand (either AX or DX:AX). 
+         * via the dst parameter, so we set src to the other implied operand (either AX or DX:AX).
          * However, src is technically an output, and dst is merely an input (which is why we must return
          * dst unchanged). So, to make traceLog() more consistent, we reverse the order of dst and src.
          */
@@ -1040,7 +1040,7 @@ var X86Grps = {
         this.resultSize = X86.RESULT.SIZE_WORD;
         /*
          * Multiply/divide instructions specify only a single operand, which the decoders pass to us
-         * via the dst parameter, so we set src to the other implied operand (either AX or DX:AX). 
+         * via the dst parameter, so we set src to the other implied operand (either AX or DX:AX).
          * However, src is technically an output, and dst is merely an input (which is why we must return
          * dst unchanged). So, to make traceLog() more consistent, we reverse the order of dst and src.
          */
@@ -1258,7 +1258,7 @@ var X86Grps = {
 /*
  * A word (or two) on instruction groups (eg, GRP1, GRP2), which are groups of instructions that
  * use a mod/reg/rm byte, where the reg field of that byte selects a function rather than a register.
- * 
+ *
  * I start with the groupings used by Intel's "Pentium Processor User's Manual (Volume 3: Architecture
  * and Programming Manual)", but I deviate slightly, mostly by subdividing their groups with the use
  * of suffixes:
@@ -1275,7 +1275,7 @@ var X86Grps = {
  *      0x0F,0x01   Grp7        GRP7 (SGDT, SIDT, LGDT, LIDT, SMSW, LMSW, INVLPG)   Group G
  *      0x0F,0xBA   Grp8        GRP8 (BT, BTS, BTR, BTC)                            Group H
  *      0x0F,0xC7   Grp9        GRP9 (CMPXCH)                                       (N/A, 80386 and up?)
- *      
+ *
  * My only serious deviation is Grp5, which I refer to as GRP4w, because it contains word forms of
  * the INC and DEC instructions found in GRP4b.  Granted, GRP4w also contains versions of the CALL,
  * JMP and PUSH instructions, which are not in GRP4b, but there's nothing in GRP4b that conflicts with
diff --git a/my_modules/pcjs-client/lib/x86help.js b/my_modules/pcjs-client/lib/x86help.js
index 06793df3f..633849e69 100644
--- a/my_modules/pcjs-client/lib/x86help.js
+++ b/my_modules/pcjs-client/lib/x86help.js
@@ -34,8 +34,8 @@
 "use strict";
 
 if (typeof module !== 'undefined') {
-    var X86 = require("./x86");
-    var Debugger = require("./debugger");
+    var X86         = require("./x86");
+    var Debugger    = require("./debugger");
 }
 
 var X86Help = {
@@ -127,14 +127,14 @@ var X86Help = {
      * @param {number} dst
      * @param {number} src
      * @return {number}
-     * 
+     *
      * 80286_and_80287_Programmers_Reference_Manual_1987.pdf, p.B-44 (p.254) notes that:
-     * 
+     *
      *      "The low 16 bits of the product of a 16-bit signed multiply are the same as those of an
      *      unsigned multiply. The three operand IMUL instruction can be used for unsigned operands as well."
-     *      
+     *
      * However, we still sign-extend the operands before multiplying, making it easier to range-check the result.
-     * 
+     *
      * (80186/80188 and up)
      */
     opHelpIMUL16: function(dst, src) {
@@ -237,8 +237,8 @@ var X86Help = {
         if (wIndex < wLower || wIndex > wUpper) {
             /*
              * The INT 0x05 handler must be called with CS:IP pointing to the BOUND instruction.
-             * 
-             * TODO: Determine the cycle impact when a BOUND exception is triggered, over and above nOpCyclesBound. 
+             *
+             * TODO: Determine the cycle impact when a BOUND exception is triggered, over and above nOpCyclesBound.
              */
             this.setIP(this.opEA - this.segCS.base);
             X86Help.opHelpINT.call(this, X86.EXCEPTION.BOUND_ERR, null, 0);
@@ -273,7 +273,7 @@ var X86Help = {
         /*
          * Currently, segVER.load() will return an error only if the selector is beyond the bounds of the
          * descriptor table or the descriptor is not for a segment.
-         * 
+         *
          * TODO: This instruction's 80286 documentation does not discuss conforming code segments; determine
          * if we need a special check for them.
          */
@@ -297,7 +297,7 @@ var X86Help = {
         /*
          * Currently, segVER.load() will return an error only if the selector is beyond the bounds of the
          * descriptor table or the descriptor is not for a segment.
-         * 
+         *
          * TODO: LSL is explicitly documented as ALSO requiring a non-null selector, so we check X86.SEL.MASK;
          * are there any other instructions that were, um, less explicit but also require a non-null selector?
          */
diff --git a/my_modules/pcjs-client/lib/x86mods.js b/my_modules/pcjs-client/lib/x86mods.js
index 5c67b66c1..b980b0f8f 100644
--- a/my_modules/pcjs-client/lib/x86mods.js
+++ b/my_modules/pcjs-client/lib/x86mods.js
@@ -34,7 +34,7 @@
 "use strict";
 
 if (typeof module !== 'undefined') {
-    var X86 = require("./x86");
+    var X86         = require("./x86");
 }
 
 var X86Mods = {
@@ -15350,7 +15350,7 @@ var X86Mods = {
      * mod=11 (reg:dst)  reg=110 (afnGrp[6])  r/m=100 (SP)
      */
     opModGrpWordF4: function(afnGrp, fnSrc) {
-        this.opFlags |= X86.OPFLAG.PUSHSP;  // we limit this hack to the only ModRM function that calls opGrpPUSHw() with SP 
+        this.opFlags |= X86.OPFLAG.PUSHSP;  // we limit this hack to the only ModRM function that calls opGrpPUSHw() with SP
         this.regSP = afnGrp[6].call(this, this.regSP, fnSrc.call(this));
     },
     /**
diff --git a/my_modules/pcjs-client/lib/x86op0f.js b/my_modules/pcjs-client/lib/x86op0f.js
index 86160f68f..18516f613 100644
--- a/my_modules/pcjs-client/lib/x86op0f.js
+++ b/my_modules/pcjs-client/lib/x86op0f.js
@@ -34,10 +34,10 @@
 "use strict";
 
 if (typeof module !== 'undefined') {
-    var X86 = require("./x86");
-    var X86Grps = require("./x86grps");
-    var X86Help = require("./x86help");
-    var X86Mods = require("./x86mods");
+    var X86         = require("./x86");
+    var X86Grps     = require("./x86grps");
+    var X86Help     = require("./x86help");
+    var X86Mods     = require("./x86mods");
 }
 
 var X86Op0F = {
@@ -149,10 +149,10 @@ var X86Op0F = {
                 /*
                  * For VERR, if the code segment is readable and conforming, the descriptor privilege level
                  * (DPL) can be any value.
-                 * 
+                 *
                  * Otherwise, DPL must be greater than or equal to (have less or the same privilege as) both the
                  * current privilege level and the selector's RPL.
-                 * 
+                 *
                  * TODO: Consider making a CPL (current privilege level) variable that tracks segCS.sel, so that we
                  * don't have to mask segCS.sel every time.
                  */
@@ -187,7 +187,7 @@ var X86Op0F = {
                 /*
                  * DPL must be greater than or equal to (have less or the same privilege as) both the current
                  * privilege level and the selector's RPL.
-                 * 
+                 *
                  * TODO: Consider making a CPL (current privilege level) variable that tracks segCS.sel, so that we
                  * don't have to mask segCS.sel every time.
                  */
@@ -261,8 +261,8 @@ var X86Op0F = {
      * opLIDT(dst, src)
      *
      * The 80286 LIDT instruction expects a 40-bit operand: a 16-bit limit, followed by a 24-bit address;
-     * the ModRM decoder has already supplied the first word of the operand (in dst), which corresponds to the 
-     * limit, so we must fetch the remaining 24 bits ourselves. 
+     * the ModRM decoder has already supplied the first word of the operand (in dst), which corresponds to the
+     * limit, so we must fetch the remaining 24 bits ourselves.
      *
      * @this {X86CPU}
      * @param {number} dst
@@ -273,7 +273,7 @@ var X86Op0F = {
         if (this.regEA < 0) {
             X86Help.opInvalid.call(this);
         } else {
-            this.addrIDT = this.getWord(this.regEA + 2) | (this.getByte(this.regEA + 4) << 16); 
+            this.addrIDT = this.getWord(this.regEA + 2) | (this.getByte(this.regEA + 4) << 16);
             this.addrIDTLimit = this.addrIDT + dst;
             if (FASTDISABLE) this.setEAWord = this.setEAWordDisabled; else this.opFlags |= X86.OPFLAG.NOWRITE;
             this.nStepCycles -= 12;
@@ -389,7 +389,7 @@ X86Op0F.aOps0F = [
  * the instructions in GRP6 and GRP7 only read their dst operand (eg, LLDT), which means the ModRM helper function
  * must insure that setEAWord() is disabled, while others only write their dst operand (eg, SLDT), which means that
  * getEAWord() should be disabled *prior* to calling the ModRM helper function.  This latter case requires that
- * we decode the reg field of the ModRM byte before dispatching.  
+ * we decode the reg field of the ModRM byte before dispatching.
  */
 X86Op0F.aOpGRP6Prot = [
     X86Op0F.opSLDT,         X86Op0F.opSTR,          X86Op0F.opLLDT,         X86Op0F.opLTR,          // 0x0F,0x00(reg=0x0-0x3)
diff --git a/my_modules/pcjs-client/lib/x86opxx.js b/my_modules/pcjs-client/lib/x86opxx.js
index fff2720a5..4737f7277 100644
--- a/my_modules/pcjs-client/lib/x86opxx.js
+++ b/my_modules/pcjs-client/lib/x86opxx.js
@@ -34,12 +34,12 @@
 "use strict";
 
 if (typeof module !== 'undefined') {
-    var Component = require("../../shared/lib/component");
-    var X86 = require("./x86");
-    var X86Grps = require("./x86grps");
-    var X86Help = require("./x86help");
-    var X86Mods = require("./x86mods");
-    var X86Op0F = require("./x86op0f");
+    var Component   = require("../../shared/lib/component");
+    var X86         = require("./x86");
+    var X86Grps     = require("./x86grps");
+    var X86Help     = require("./x86help");
+    var X86Mods     = require("./x86mods");
+    var X86Op0F     = require("./x86op0f");
 }
 
 var X86OpXX = {
@@ -1194,14 +1194,14 @@ var X86OpXX = {
     opINSb: function() {
         var nReps = 1;
         var nDelta = 0;
-        
+
         /*
          * NOTE: 5 + 4n is the cycle time for the 80286; the 80186/80188 has different values: 14 cycles for
          * an unrepeated INS, and 8 + 8n for a repeated INS.  However, accurate cycle times for the 80186/80188 is
          * low priority.
          */
         var nCycles = 5;
-        
+
         /*
          * The (normal) REP prefix, if used, is REPNZ (0xf2), but either one works....
          */
@@ -1210,7 +1210,7 @@ var X86OpXX = {
             nDelta = 1;
             if (this.opPrefixes & X86.OPFLAG.REPEAT) nCycles = 4;
         }
-        
+
         if (nReps--) {
             var b = this.bus.checkPortInputNotify(this.regDX, this.regEIP - nDelta - 1);
             this.setSOByte(this.segES, this.regDI, b);
@@ -1240,7 +1240,7 @@ var X86OpXX = {
     opINSw: function() {
         var nReps = 1;
         var nDelta = 0;
-        
+
         /*
          * NOTE: 5 + 4n is the cycle time for the 80286; the 80186/80188 has different values: 14 cycles for
          * an unrepeated INS, and 8 + 8n for a repeated INS.  However, accurate cycle times for the 80186/80188 is
@@ -1278,13 +1278,13 @@ var X86OpXX = {
      * @this {X86CPU}
      *
      * NOTE: Segment overrides are ignored for this instruction, so we must use segDS instead of segData.
-     * 
+     *
      * op=0x6E (outsb) (80186/80188 and up)
      */
     opOUTSb: function() {
         var nReps = 1;
         var nDelta = 0;
-        
+
         /*
          * NOTE: 5 + 4n is the cycle time for the 80286; the 80186/80188 has different values: 14 cycles for
          * an unrepeated INS, and 8 + 8n for a repeated INS.  However, accurate cycle times for the 80186/80188 is
@@ -1327,7 +1327,7 @@ var X86OpXX = {
     opOUTSw: function() {
         var nReps = 1;
         var nDelta = 0;
-        
+
         /*
          * NOTE: 5 + 4n is the cycle time for the 80286; the 80186/80188 has different values: 14 cycles for
          * an unrepeated INS, and 8 + 8n for a repeated INS.  However, accurate cycle times for the 80186/80188 is
@@ -1647,15 +1647,15 @@ var X86OpXX = {
          * If the second operand is a register, then the ModeRegByte decoder must use separate "get" and
          * "set" assignments, otherwise instructions like "XCHG DH,DL" will end up using a stale DL instead of
          * our updated DL.
-         * 
+         *
          * To be clear, a single assignment like this will fail:
-         * 
+         *
          *      opModeRegByteF2: function(fn) {
          *          this.regDX = (this.regDX & 0xff) | (fn.call(this, this.regDX >> 8, this.regDX & 0xff) << 8);
          *      }
          *
          * which is why all affected decoders now use separate assignments; eg:
-         * 
+         *
          *      opModeRegByteF2: function(fn) {
          *          var b = fn.call(this, this.regDX >> 8, this.regDX & 0xff);
          *          this.regDX = (this.regDX & 0xff) | (b << 8);
@@ -1981,7 +1981,7 @@ var X86OpXX = {
     },
     /**
      * @this {X86CPU}
-     * 
+     *
      * op=0x9B (wait)
      */
     opWAIT: function() {
@@ -2019,7 +2019,7 @@ var X86OpXX = {
     opSAHF: function() {
         /*
          * NOTE: While it make LOOK more efficient to do this:
-         * 
+         *
          *      this.setPS((this.getPS() & ~X86.PS.SAHF) | ((this.regAX >> 8) & X86.PS.SAHF));
          *
          * the call to getPS() forces all the "indirect" flags to be resolved first, and then the call
@@ -2729,7 +2729,7 @@ var X86OpXX = {
      * @this {X86CPU}
      *
      * Here's the pseudo-code from http://www.pcjs.org/pubs/pc/reference/intel/80286/progref, p.B-40 (p.250):
-     * 
+     *
      *      LEVEL := LEVEL MOD 32
      *      Push BP
      *      Set a temporary value FRAME_PTR := SP
@@ -2742,7 +2742,7 @@ var X86OpXX = {
      *      End if
      *      BP := FRAME_PTR
      *      SP := SP - first operand
-     *      
+     *
      * TODO: Verify that this pseudo-code is identical on the 80186/80188 (eg, is LEVEL MOD 32 performed in both instances?)
      *
      * op=0xC8 (enter imm16,imm8) (80186/80188 and up)
@@ -2771,7 +2771,7 @@ var X86OpXX = {
     },
     /**
      * @this {X86CPU}
-     * 
+     *
      * Set SP to BP, then pop BP
      *
      * op=0xC9 (leave) (80186/80188 and up)
@@ -3359,7 +3359,7 @@ var X86OpXX = {
 
 /*
  * This 256-entry array of opcode functions is at the heart of the CPU engine: stepCPU(n).
- * 
+ *
  * It might be worth trying a switch() statement instead, to see how the performance compares,
  * but I suspect that would vary quite a bit across JavaScript engines; for now, I'm putting my
  * money on array lookup.
@@ -3405,7 +3405,7 @@ X86OpXX.aOps = [
     /*
      * On all processors, opcode groups 0x80 and 0x82 perform identically (0x82 opcodes sign-extend their
      * immediate data, but since both 0x80 and 0x82 are byte operations, the sign extension has no effect).
-     * 
+     *
      * WARNING: Intel's "Pentium Processor User's Manual (Volume 3: Architecture and Programming Manual)" refers
      * to opcode 0x82 as a "reserved" instruction, but also cryptically refers to it as "MOVB AL,imm".  This is
      * assumed to be an error in the manual, because as far as I know, 0x82 has always mirrored 0x80.
diff --git a/my_modules/pcjs-client/lib/x86seg.js b/my_modules/pcjs-client/lib/x86seg.js
index 145cac651..a92cff952 100644
--- a/my_modules/pcjs-client/lib/x86seg.js
+++ b/my_modules/pcjs-client/lib/x86seg.js
@@ -34,17 +34,17 @@
 "use strict";
 
 if (typeof module !== 'undefined') {
-    var X86 = require("./x86");
-    var X86Help = require("./x86help");
+    var X86         = require("./x86");
+    var X86Help     = require("./x86help");
 }
 
 /**
  * X86Seg(cpu, sName)
- * 
+ *
  * @constructor
  * @param {X86CPU} cpu
  * @param {string} [sName] segment name
- * @param {boolean} [fProt] true if segment register used exclusively in protected-mode 
+ * @param {boolean} [fProt] true if segment register used exclusively in protected-mode
  */
 function X86Seg(cpu, sName, fProt)
 {
@@ -64,7 +64,7 @@ function X86Seg(cpu, sName, fProt)
 
 /**
  * loadReal(sel, fSuppress)
- * 
+ *
  * This is the default real-mode load() function.
  *
  * @this {X86Seg}
@@ -84,7 +84,7 @@ X86Seg.loadReal = function loadReal(sel, fSuppress)
  *
  * This replaces the segment's default load() function whenever the segment is notified (eg, by the CPU's setProtMode()
  * function) the processor is now in protected-mode.
- * 
+ *
  * Segments in protected-mode are referenced by selectors, which are indexes into descriptor tables (GDT, LDT, IDT) whose
  * descriptors are 4-word (8-byte) entries:
  *
@@ -92,7 +92,7 @@ X86Seg.loadReal = function loadReal(sel, fSuppress)
  *      word 1: base address low
  *      word 2: base address high (0-7), segment type (8-11), descriptor type (12), DPL (13-14), present bit (15)
  *      word 3: used only on 80386 and up (should be set to zero for upward compatibility)
- *      
+ *
  * See X86.DESC for offset and bit definitions.
  *
  * @this {X86Seg}
@@ -115,23 +115,23 @@ X86Seg.loadProt = function loadProt(sel, fSuppress)
     if (offDT + 7 <= addrDTLimit) {
         this.checkRead = X86Seg.checkReadProtEnabled;
         this.checkWrite = X86Seg.checkWriteProtEnabled;
-        
+
         /*
          * TODO: This is only the first of many steps toward accurately counting cycles in protected mode;
          * I simply noted that "POP segreg" takes 5 cycles in real mode and 20 in protected mode, so I'm
          * starting with a 15-cycle difference.  Obviously the difference will be much greater when the load fails.
          */
         this.cpu.nStepCycles -= 15;
-        
+
         /*
          * TODO: Use (direct) Bus memory interfaces instead of (indirect) CPU memory interfaces here?
          */
         var limit = this.cpu.getWord(offDT + X86.DESC.LIMIT.OFFSET);
         var acc = this.cpu.getWord(offDT + X86.DESC.ACC.OFFSET);
         var base = this.cpu.getWord(offDT + X86.DESC.BASE.OFFSET) | ((acc & X86.DESC.ACC.BASE1623) << 16);
-        
+
         Component.assert(this.cpu.getWord(offDT + 0x06) == 0);
-        
+
         /*
          * For LSL (which uses fSuppress), we must support X86.DESC.ACC.TYPE.SEG as well as TSS and LDT.
          */
@@ -271,7 +271,7 @@ X86Seg.checkWriteProtDisabled = function checkWriteProtDisabled(off, cb, fSuppre
  *
  * Early versions of PCjs saved only segment selectors, since that's all that mattered in real-mode;
  * newer versions need to save/restore the entire segment object.
- * 
+ *
  * @this {X86Seg}
  * @return {Array}
  */
@@ -285,7 +285,7 @@ X86Seg.prototype.save = function()
  *
  * Early versions of PCjs saved only segment selectors, since that's all that mattered in real-mode;
  * newer versions need to save/restore the entire segment object.
- * 
+ *
  * @this {X86Seg}
  * @param {Array|number} a
  */
@@ -305,12 +305,12 @@ X86Seg.prototype.restore = function(a)
 
 /**
  * setBase(addr)
- * 
+ *
  * This is used in unusual situations where the base must be set independently; normally, the base
  * is set according to the selector provided to load(), but there are a few cases where setBase() is
  * required (eg, in resetRegs() where the 80286 wants the real-mode CS selector to be 0xF000 but the
  * CS base must be 0xFF0000, and LOADALL).
- * 
+ *
  * @this {X86Seg}
  * @param {number} addr
  */
diff --git a/versions/pcjs/1.15.5/pc-dbg.js b/versions/pcjs/1.15.5/pc-dbg.js
index 8002cd557..1aae29aaf 100644
--- a/versions/pcjs/1.15.5/pc-dbg.js
+++ b/versions/pcjs/1.15.5/pc-dbg.js
@@ -8,95 +8,95 @@ n.send(q)}else n.open("GET",a,b),n.send();a=[];b||(h=n.responseText,200!=n.statu
 function va(a){if(window){var b=window?window.navigator.userAgent:"";return"iOS"==a&&b.match(/(iPod|iPhone|iPad)/)&&b.match(/AppleWebKit/)||"MSIE"==a&&b.match(/(MSIE|Trident)/)||0<=b.indexOf(a)?!0:!1}return!1}function wa(a,b,c){function d(){a-=1;0<=a&&(b()||(a=0));0=this.cg?12:14;this.ec=1<>2;this.eb=this.ec-1;this.Zg=(this.ue+this.ec)/this.ec|0;this.ye=this.Zg-1;this.rd=[];this.sd=[];this.Zf=this.$f=!1;this.Li();this.Ta()}y(x,Va);
-Va.prototype.Li=function(){this.Aa=Array(this.Zg);for(var a=0;a>a.rb;0>this.rb;0>a.rb;0>a.rb].tg(b&a.eb)}
-function cb(a,b){var c=b&a.eb,d=(b&a.Ib)>>a.rb;return c!=a.eb?a.Aa[d].Oj(c):a.Aa[d++].tg(c)|a.Aa[d&a.ye].tg(0)<<8}function db(a,b,c){a.Aa[(b&a.Ib)>>a.rb].Bg(b&a.eb,c&255)}function eb(a,b,c){var d=b&a.eb;b=(b&a.Ib)>>a.rb;d!=a.eb?a.Aa[b].Xj(d,c&65535):(a.Aa[b++].Bg(d,c&255),a.Aa[b&a.ye].Bg(0,c>>8&255))}
-function fb(a){for(var b=0,c=[],d=0;d=this.cg?12:14;this.fc=1<>2;this.eb=this.fc-1;this.Zg=(this.ue+this.fc)/this.fc|0;this.ye=this.Zg-1;this.rd=[];this.sd=[];this.Zf=this.$f=!1;this.Ni();this.Ta()}y(x,Va);
+Va.prototype.Ni=function(){this.Aa=Array(this.Zg);for(var a=0;a>a.rb;0>this.rb;0>a.rb;0>a.rb].tg(b&a.eb)}
+function cb(a,b){var c=b&a.eb,d=(b&a.Ib)>>a.rb;return c!=a.eb?a.Aa[d].Rj(c):a.Aa[d++].tg(c)|a.Aa[d&a.ye].tg(0)<<8}function db(a,b,c){a.Aa[(b&a.Ib)>>a.rb].Bg(b&a.eb,c&255)}function eb(a,b,c){var d=b&a.eb;b=(b&a.Ib)>>a.rb;d!=a.eb?a.Aa[b].$j(d,c&65535):(a.Aa[b++].Bg(d,c&255),a.Aa[b&a.ye].Bg(0,c>>8&255))}
+function fb(a){for(var b=0,c=[],d=0;d>2);for(d=0;d>2]>>>((a&3)<<3)&255},hp:function(a){var b=a>>2;a=(a&3)<<3;var c=this.ra[b]>>>a;return 24>a?c&65535:c&255|(this.ra[b+1]&255)<<8},pp:function(a,b){var c=a>>
-2,d=(a&3)<<3;this.ra[c]=this.ra[c]&~(255<>2,d=(a&3)<<3;24>d?this.ra[c]=this.ra[c]&~(65535<>8);this.mb=!0},gp:function(a){qb(this.X,this.Wd+a);return this.tg(a)},ip:function(a){qb(this.X,this.Wd+a)||qb(this.X,this.Wd+a+1);return this.Oj(a)},qp:function(a,b){rb(this.X,this.Wd+a);this.Bg(a,b)},sp:function(a,b){rb(this.X,this.Wd+a)||rb(this.X,this.Wd+a+1);this.Xj(a,b)},save:function(){return this.ia?
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+function ge(){I(this,this.Hh-this.ua.Ua);ld.call(this,0,null,2)}function Yb(a,b){this.X&&E(this.X,this.X.qm)&&this.X.message("Fault 0x"+r(a)+(null!=b?" (0x"+u(b)+")":"")+" on opcode 0x"+r(bb(this.na,this.Ba))+" at "+da(this.qa,this.ua.oa));80186<=this.Fa&&(I(this,this.Hh-this.ua.Ua),ld.call(this,a,b,0))}function ac(){Yb.call(this,6);this.Ab()}function M(){I(this,this.Hh-this.ua.Ua);Sa(this,"Undefined opcode 0x"+r(bb(this.na,this.Ba))+" at "+da(this.qa,this.ua.oa));this.Ab()}
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