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Added --xdf option to DiskDump to enable (experimental) XDF support

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Without --xdf, DiskDump simply dumps an XDF disk image as a vanilla 80-track, 23-sectors-per-track disk image.
In addition, I regenerated all the PC-DOS 7.00 disk images without --xdf, to see if that works any better (it seems to work for VirtualBox)
This commit is contained in:
Jeff Parsons 2014-10-26 11:09:21 -07:00 • committed by jeffpar
commit 715e603ea2
6 changed files with 27 additions and 20 deletions
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31
my_modules/diskdump/lib/diskdump.js
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@ -79,14 +79,15 @@ var fNormalize = true;
*
* @constructor
* @param {string|Array} sDiskPath
* @param {Array|null|undefined} asExclude contains filename exclusions, if any
* @param {string|undefined} sFormat is the output format, one of "json"|"data"|"hex"|"bytes"|"img"
* @param {boolean|string|undefined} fComments enables comments and other readability enhancements in the JSON output
* @param {string|undefined} mbHD specifies a hard disk size, in megabytes, when building a new image
* @param {Array|null} [asExclude] contains filename exclusions, if any
* @param {string} [sFormat] is the output format, one of "json"|"data"|"hex"|"bytes"|"img"
* @param {boolean|string} [fComments] enables comments and other readability enhancements in the JSON output
* @param {string} [mbHD] specifies a hard disk size, in megabytes, when building a new image
* @param {string|null} [sServerRoot]
* @param {string} [sManifestFile]
* @param {Object} [argv] optional (experimental) arguments, if any
*/
function DiskDump(sDiskPath, asExclude, sFormat, fComments, mbHD, sServerRoot, sManifestFile)
function DiskDump(sDiskPath, asExclude, sFormat, fComments, mbHD, sServerRoot, sManifestFile, argv)
{
/*
* I used to set this.sServerRoot to "sServerRoot || process.cwd()", but in reality, the
@ -103,6 +104,7 @@ function DiskDump(sDiskPath, asExclude, sFormat, fComments, mbHD, sServerRoot, s
this.nJSONIndent = 0;
this.fJSONComments = fComments;
this.sJSONWhitespace = (this.fJSONComments? " " : "");
this.fXDFSupport = (argv && argv['xdf']);
/*
* The dump operation itself doesn't care about sManifestFile, but we DO need some indication
@ -296,6 +298,8 @@ DiskDump.aDefaultBPBs = [
* --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
* --manifest[={filename}]: update the specified manifest.xml file with details about the disk image
* --xdf: enable support for XDF-formatted disk images (experimental)
*
* Examples
* ---
@ -371,7 +375,7 @@ DiskDump.CLI = function()
var sManifestTitle = argv['title'];
if (sDiskPath) {
var disk = new DiskDump(sDiskPath, asExclude, argv['format'], argv['comments'], argv['mbhd'], sServerRoot, sManifestFile);
var disk = new DiskDump(sDiskPath, asExclude, argv['format'], argv['comments'], argv['mbhd'], sServerRoot, sManifestFile, argv);
if (sDir) {
disk.buildImage(true, function(err) {
DiskDump.outputDisk(err, disk, sDiskPath, sOutputFile, fOverwrite, sManifestTitle);
@ -2105,7 +2109,7 @@ DiskDump.prototype.convertToJSON = function()
* but at some point, we'll need to perform more general calculations to properly deal with ANY disk
* image whose logical format doesn't agree with its physical structure.
*/
var fXDF = false;
var fXDFOutput = false;
var oDisketteFormat = DiskDump.DisketteFormats[cbDiskData];
if (oDisketteFormat) {
nHeads = oDisketteFormat[0];
@ -2144,18 +2148,21 @@ DiskDump.prototype.convertToJSON = function()
* currently (try to) support.
*
* Moreover, the first two tracks (ie, the first cylinder) contain only 19 sectors each,
* rather than 23, but the XDF format still pads those tracks with 4 unused sectors.
* rather than 23, but XDF disk images still pads those tracks with 4 unused sectors.
*
* So, data for the first track contains 1 boot sector ending at 512 (0x200), 11 FAT sectors
* ending at 6144 (0x1800), and 7 "micro-disk" sectors ending at 9728 (0x2600). Then there's
* 4 sectors (presumably of "garbage") that end at 11776 (0x2E00).
* 4 (useless?) sectors that end at 11776 (0x2E00).
*
* Data for the second track contains 7 root directory sectors ending at 15360 (0x3C00), followed
* by disk data.
*
* For more details, check out this helpful article: http://www.os2museum.com/wp/the-xdf-diskette-format/
*/
if (nSectorsTotalBPB == 3680) fXDF = true;
if (nSectorsTotalBPB == 3680 && this.fXDFSupport) {
DiskDump.logWarning("XDF diskette detected, experimental XDF output enabled");
fXDFOutput = true;
}
}
}
}
@ -2294,14 +2301,14 @@ DiskDump.prototype.convertToJSON = function()
* 4 1 5 12
* 3 1 14 18
*/
if (fXDF) nSectorsThisTrack = (iCylinder? 4 : 19);
if (fXDFOutput) nSectorsThisTrack = (iCylinder? 4 : 19);
for (var iSector=1, offSector=0; iSector <= nSectorsThisTrack && offSector < cbTrack; iSector++, offSector += cbSectorThisTrack) {
var sector = {};
var nSector = iSector;
if (fXDF && iCylinder) {
if (fXDFOutput && iCylinder) {
if (!iHead) {
cbSectorThisTrack = (iSector == 1? 1024 : (iSector == 2? 512 : (iSector == 3? 2048 : 8192)));
} else {