From 829fb48bdce168513eae77def73a744dbd3dab3b Mon Sep 17 00:00:00 2001
From: Jeff Parsons <jeff@pcjs.org>
Date: Mon, 1 Aug 2016 16:22:22 -0700
Subject: [PATCH] First successful display of a VT100 test screen

---
 devices/pc8080/machine/vt100/README.md   |  16 +-
 devices/pc8080/machine/vt100/machine.xml |   2 +-
 modules/c1pjs/lib/defines.js             |   2 +-
 modules/pc8080/lib/computer.js           |   4 +
 modules/pc8080/lib/defines.js            |   2 +-
 modules/pc8080/lib/video.js              | 217 +++++++++---
 modules/pcx86/lib/defines.js             |   2 +-
 versions/pc8080/1.23.3/pc8080-dbg.js     | 411 +++++++++++------------
 versions/pc8080/1.23.3/pc8080.js         | 278 +++++++--------
 9 files changed, 522 insertions(+), 412 deletions(-)

diff --git a/devices/pc8080/machine/vt100/README.md b/devices/pc8080/machine/vt100/README.md
index 8eb8deaa7..4b3fec3ca 100644
--- a/devices/pc8080/machine/vt100/README.md
+++ b/devices/pc8080/machine/vt100/README.md
@@ -47,7 +47,7 @@ to "true", indicating that existing RAM should be used, and a new property, *buf
 enabling support for the VT100's line data format; eg:
 
 	<ram id="ram" addr="0x2000" size="0x0C00"/>
-	<video id="video" screenWidth="1600" screenHeight="800" bufferAddr="0x2000" bufferRAM="true" bufferFormat="vt100" bufferCols="80" bufferRows="24" ...>
+	<video id="video" screenWidth="1600" screenHeight="960" bufferAddr="0x2000" bufferRAM="true" bufferFormat="vt100" bufferCols="80" bufferRows="24" ...>
 
 Ordinarily, the VT100 screen displays 800 dots per horizontal scan, and a total of 240 horizontal scans, and by default,
 it uses a 10x10 character cell, for a total of 80 columns and 24 rows of characters.  However, in 132-column mode, it
@@ -56,14 +56,14 @@ for 14 rows of characters; this implies a total of 1188 dots displayed per horiz
 scans.  This means we will have to dynamically reallocate the buffer display context whenever the horizontal dimensions change
 (ie, from 800 to 1188, or from 1188 back to 800).
 
-For optimum scaling, I would normally define the virtual screen size using multiples of the VT100's "dot" dimensions;
-eg, 1600x960 (a horizontal multiplier of 2 and a vertical multiplier of 4).  However, that would give us a virtual screen
-aspect ratio of 1.67, which is less than the (apparent) 2.0 aspect ratio of a physical VT100 screen, so I've changed the
-test machine's screen dimensions to 1600x800.
+For optimum scaling, I define the virtual screen size using multiples of the VT100's default "dot" dimensions; eg, 1600x960
+(a horizontal multiplier of 2 and a vertical multiplier of 4).  However, that gives us a virtual screen aspect ratio of 1.67,
+which is less than the (apparent) 2.0 aspect ratio of a physical VT100 screen.  But I'm resisting changing the test machine's
+virtual screen dimensions (to, say, 1600x800) until I've done more "aspect ratio research".
 
-Regarding physical dimensions, a VT100 screen measures 12 inches diagonally, and in 80-column mode, characters measure
-2.0mm x 3.35mm (in 132-column mode, they measure 1.3mm x 3.35mm).  This means that the text area of the screen is roughly
-160mm x 80mm, implying a screen aspect ratio of 2.0.
+Here's what we know from the Technical Manual: a physical VT100 screen measures 12 inches diagonally, and in 80-column mode,
+characters measure 2.0mm x 3.35mm (in 132-column mode, they measure 1.3mm x 3.35mm).  This means that the text area of the
+screen is roughly 160mm x 80mm, implying a screen aspect ratio of 2.0.
 
 {% include machine.html id="vt100" %}
 
diff --git a/devices/pc8080/machine/vt100/machine.xml b/devices/pc8080/machine/vt100/machine.xml
index 647d2d089..24fe8ad2e 100644
--- a/devices/pc8080/machine/vt100/machine.xml
+++ b/devices/pc8080/machine/vt100/machine.xml
@@ -6,7 +6,7 @@
 	<cpu id="cpu8080" model="8080" cycles="2000000"/>
 	<rom id="rom" addr="0x0000" size="0x2000" file="/devices/pc8080/rom/vt100/VT100.json"/>
 	<ram id="ram" addr="0x2000" size="0x0C00"/>
-	<video id="video" screenWidth="1600" screenHeight="800" smoothing="false"
+	<video id="video" screenWidth="1600" screenHeight="960" smoothing="false"
 		   fontROM="/devices/pc8080/rom/vt100/23-018E2.json" fontColor="white" cellWidth="10" cellHeight="10"
 		   bufferAddr="0x2000" bufferRAM="true" bufferFormat="vt100" bufferCols="80" bufferRows="24" pos="left" padding="8px">
 		<menu>
diff --git a/modules/c1pjs/lib/defines.js b/modules/c1pjs/lib/defines.js
index e8ac6b205..9ebb2c260 100644
--- a/modules/c1pjs/lib/defines.js
+++ b/modules/c1pjs/lib/defines.js
@@ -72,4 +72,4 @@ var C1PJS = {
     PRIVATE:     PRIVATE,       // shared
     SITEHOST:    SITEHOST,      // shared
     XMLVERSION:  XMLVERSION     // shared
-}
+};
diff --git a/modules/pc8080/lib/computer.js b/modules/pc8080/lib/computer.js
index 9c9f05027..9f89c72cc 100644
--- a/modules/pc8080/lib/computer.js
+++ b/modules/pc8080/lib/computer.js
@@ -38,6 +38,10 @@ if (NODE) {
     var UserAPI     = require("../../shared/lib/userapi");
     var ReportAPI   = require("../../shared/lib/reportapi");
     var Component   = require("../../shared/lib/component");
+    /*
+     * TODO: I'm confused why WebStorm complains if the following require() is missing in THIS file but not other files.
+     */
+    var PC8080      = require("./defines");
     var Messages    = require("./messages");
     var Bus         = require("./bus");
     var State       = require("./state");
diff --git a/modules/pc8080/lib/defines.js b/modules/pc8080/lib/defines.js
index 8868ebcb5..c563c655f 100644
--- a/modules/pc8080/lib/defines.js
+++ b/modules/pc8080/lib/defines.js
@@ -92,7 +92,7 @@ var PC8080 = {
     TYPEDARRAYS: TYPEDARRAYS,
     SITEHOST:    SITEHOST,      // shared
     XMLVERSION:  XMLVERSION     // shared
-}
+};
 
 if (NODE) {
     global.APPCLASS    = APPCLASS;
diff --git a/modules/pc8080/lib/video.js b/modules/pc8080/lib/video.js
index dd0fa601b..0e517937e 100644
--- a/modules/pc8080/lib/video.js
+++ b/modules/pc8080/lib/video.js
@@ -131,8 +131,8 @@ function Video(parmsVideo, canvas, context, textarea, container)
         }
     }
 
-    this.interruptRate = parmsVideo['interruptRate'];
-    this.refreshRate = parmsVideo['refreshRate'] || 60;
+    this.rateInterrupt = parmsVideo['interruptRate'];
+    this.rateRefresh = parmsVideo['refreshRate'] || 60;
 
     this.canvasScreen = canvas;
     this.contextScreen = context;
@@ -267,13 +267,13 @@ Video.FORMATS = {
 Video.VT100 = {
     /*
      * The following font IDs are nothing more than all the possible LINEATTR values masked with FONTMASK;
-     * it's also worth noting that double-high implies double-wide; the VT100 doesn't support double-high single-wide.
+     * also, note that double-high implies double-wide; the VT100 doesn't support a double-high single-wide font.
      */
     FONT: {
-        NORML:      0x60,
-        DWIDE:      0x40,
-        DHIGH_TOP:  0x20,
-        DHIGH_BOT:  0x00
+        NORML:      0x60,       // normal font (eg, 10x10)
+        DWIDE:      0x40,       // double-wide, single-high font (eg, 20x10)
+        DHIGH:      0x20,       // technically, this means display only the TOP half of the double-high font (eg, 20x20)
+        DHIGH_BOT:  0x00        // technically, this means display only the BOTTOM half of the double-high font (eg, 20x20)
     },
     LINETERM:       0x7F,
     LINEATTR: {
@@ -325,19 +325,16 @@ Video.prototype.initBuffers = function()
     this.canvasBuffer.height = cyBuffer;
     this.contextBuffer = this.canvasBuffer.getContext("2d");
 
+    this.aFonts = {};
     this.initColors();
 
     if (this.nFormat == Video.FORMAT.VT100) {
-        this.aFonts = {};
-        this.aFonts[Video.VT100.FONT.NORML] = this.createFontVariation(this.cxCell, this.cyCell);
-        this.aFonts[Video.VT100.FONT.DWIDE] = this.createFontVariation(this.cxCell*2, this.cyCell);
-        this.aFonts[Video.VT100.FONT.DHIGH_TOP] = this.aFonts[Video.VT100.FONT.DHIGH_BOT] = this.createFontVariation(this.cxCell*2, this.cyCell*2);
         /*
          * Beyond fonts, VT100 support requires that we maintain a number of additional properties:
          *
-         *      nRefreshRate: must be either 50 or 60 (defaults to 60); we don't emulate any particular refresh rate,
-         *      but we do need to keep track of which rate has been selected, because that affects the number of "fill
-         *      lines" that are present at the top of the VT100's frame buffer: 2 lines for 60Hz, 5 lines for 50Hz.
+         *      rateMonitor: must be either 50 or 60 (defaults to 60); we don't emulate the monitor refresh rate,
+         *      but we do need to keep track of which rate has been selected, because that affects the number of
+         *      "fill lines" present at the top of the VT100's frame buffer: 2 lines for 60Hz, 5 lines for 50Hz.
          *
          *      The VT100 July 1982 Technical Manual, p. 4-89, shows the following sample frame buffer layout:
          *
@@ -358,15 +355,16 @@ Video.prototype.initBuffers = function()
          *
          *      ERRATA: The manual claims that if you change the byte at 0x2002 from 03 to 09, the number of "fill
          *      lines" will change from 2 to 5 (for 50Hz operation), but it shows 06 instead of 0C at location 0x200B;
-         *      if you follow the links, it's pretty clear that byte has to be 0C to yield a 5-line delay.  Since the
-         *      address following the terminator at 0x2006 points to itself, it only makes sense for that terminator
-         *      to be used at the end of the frame buffer.
+         *      if you follow the links, it's pretty clear that byte has to be 0C to yield 5 "fill lines".  Since the
+         *      address following the terminator at 0x2006 points to itself, it never makes sense for that terminator
+         *      to be used EXCEPT at the end of the frame buffer.
          *
-         *      As an alternative to tracking the refresh rate setting, we could hard-code some knowledge about how
-         *      the VT100's 8080 code uses memory, and simply ignore lines below address 0x22D0.  But that seems cheesy.
+         *      As an alternative to tracking the monitor refresh rate, we could hard-code some knowledge about how
+         *      the VT100's 8080 code uses memory, and simply ignore lines below address 0x22D0.  But the VT100 Video
+         *      Processor makes no such assumption, and it would also break our test code in createFonts(), which
+         *      builds a contiguous screen of test data starting at the default frame buffer address (0x2000).
          */
-        this.nRefreshRate = 60;
-
+        this.rateMonitor = 60;
         this.abLineBuffer = new Array(this.nColsBuffer);
     }
 };
@@ -395,7 +393,7 @@ Video.prototype.initBus = function(cmp, bus, cpu, dbg)
     }
 
     /*
-     * Allocate the frame buffer (as needed) along with all other buffers
+     * Allocate the frame buffer (as needed) along with all other buffers.
      */
     this.initBuffers();
 
@@ -430,29 +428,29 @@ Video.prototype.doneLoad = function(sURL, sFontData, nErrorCode)
 
     try {
         /*
-         * The most likely source of any exception will be right here, where we're parsing the JSON-encoded data.
+         * The most likely source of any exception will be here: parsing the JSON-encoded data.
          */
-        var abFontData = eval("(" + sFontData + ")");
+        var ab = eval("(" + sFontData + ")");
 
-        var ab = abFontData['bytes'] || abFontData;
+        var abFontData = ab['bytes'] || ab;
 
-        if (!ab.length) {
+        if (!abFontData || !abFontData.length) {
             Component.error("Empty font ROM: " + sURL);
             return;
         }
-        else if (ab.length == 1) {
-            Component.error(ab[0]);
+        else if (abFontData.length == 1) {
+            Component.error(abFontData[0]);
             return;
         }
 
         /*
          * Minimal font data validation, just to make sure we're not getting garbage from the server...
          */
-        if (ab.length == 2048) {
-            this.abFontdata = ab;
+        if (abFontData.length == 2048) {
+            this.createFonts(abFontData);
         }
         else {
-            this.notice("Unrecognized font data length (" + ab.length + ")");
+            this.notice("Unrecognized font data length (" + abFontData.length + ")");
             return;
         }
 
@@ -471,7 +469,24 @@ Video.prototype.doneLoad = function(sURL, sFontData, nErrorCode)
 };
 
 /**
- * createFontVariation(cxCell, cyCell, rgbOn, fUnderline, fReverse)
+ * createFonts(abFontData)
+ *
+ * @this {Video}
+ * @param {Array.<number>} abFontData
+ */
+Video.prototype.createFonts = function(abFontData)
+{
+    /*
+     * We retain abFontData in case we have to rebuild the fonts (eg, we switch from 80 to 132 columns)
+     */
+    this.abFontData = abFontData;
+    this.aFonts[Video.VT100.FONT.NORML] = this.createFontVariation(this.cxCell, this.cyCell);
+    this.aFonts[Video.VT100.FONT.DWIDE] = this.createFontVariation(this.cxCell*2, this.cyCell);
+    this.aFonts[Video.VT100.FONT.DHIGH] = this.aFonts[Video.VT100.FONT.DHIGH_BOT] = this.createFontVariation(this.cxCell*2, this.cyCell*2);
+};
+
+/**
+ * createFontVariation(cxCell, cyCell, rgbOn, fReverse, fUnderline)
  *
  * This creates a 16x16 character grid for the requested font variation.  Variations include:
  *
@@ -479,18 +494,18 @@ Video.prototype.doneLoad = function(sURL, sFontData, nErrorCode)
  *      2) double-wide characters (cell size is this.cxCell*2 x this.cyCell)
  *      3) double-high characters (cell size is this.cxCell x this.cyCell*2)
  *      4) double-both characters (cell size is this.cxCell*2 x this.cyCell*2)
- *      5) all of the above with underlining enabled
- *      6) all of the above with reverse video enabled
+ *      5) all of the above with reverse video enabled
+ *      6) all of the above with underlining enabled
  *
  * @this {Video}
  * @param {number} cxCell is the target width of each character in the grid
  * @param {number} cyCell is the target height of each character in the grid
  * @param {Array} [rgbOn] contains the RGB values for the font (default is white)
- * @param {boolean} [fUnderline]
  * @param {boolean} [fReverse]
+ * @param {boolean} [fUnderline]
  * @return {Object}
  */
-Video.prototype.createFontVariation = function(cxCell, cyCell, rgbOn, fUnderline, fReverse)
+Video.prototype.createFontVariation = function(cxCell, cyCell, rgbOn, fReverse, fUnderline)
 {
     /*
      * On a VT100, cxCell,cyCell is initially 10,10, but may change to 9,10 for 132-column mode.
@@ -541,21 +556,100 @@ Video.prototype.createFontVariation = function(cxCell, cyCell, rgbOn, fUnderline
          */
         font.context.putImageData(imageChar, (iChar & 0xf) * cxCell, (iChar >> 4) * cyCell);
     }
-
-    /*
-     * Enable this code if you want to see what the generated font looks like....
-     *
-    if (MAXDEBUG) {
-        var iSrcColor = (iColor == 15? 0 : iColor + 1);
-        this.contextScreen.fillStyle = aCSSColors[iSrcColor];
-        this.contextScreen.fillRect(iColor*(font.cxCell<<2), 0, font.canvas.width>>2, font.cyCell<<4);
-        this.contextScreen.drawImage(font.canvas, 0, iColor*(font.cyCell<<4), font.canvas.width>>2, font.cyCell<<4, iColor*(font.cxCell<<2), 0, font.canvas.width>>2, font.cyCell<<4);
-    }
-     */
-
     return font;
 };
 
+/**
+ * powerUp(data, fRepower)
+ *
+ * @this {Video}
+ * @param {Object|null} data
+ * @param {boolean} [fRepower]
+ * @return {boolean} true if successful, false if failure
+ */
+Video.prototype.powerUp = function(data, fRepower)
+{
+    /*
+     * Because the VT100 frame buffer can be located anywhere in RAM (above 0x2000), we must defer this
+     * test code until the powerUp() notification handler is called, when all RAM has (hopefully) been allocated.
+     */
+    if (DEBUG && this.nFormat == Video.FORMAT.VT100) {
+        /*
+         * Build a test screen in the VT100 frame buffer; we'll mimic the "SET-UP A" screen, since it uses
+         * all the font variations.
+         */
+        var aLineData = {
+             0: [Video.VT100.FONT.DHIGH, 'SET-UP A'],
+             2: [Video.VT100.FONT.DWIDE, 'TO EXIT PRESS "SET-UP"'],
+            /*
+             3: [Video.VT100.FONT.NORML, '4'],
+             4: [Video.VT100.FONT.NORML, '5'],
+             5: [Video.VT100.FONT.NORML, '6'],
+             6: [Video.VT100.FONT.NORML, '7'],
+             7: [Video.VT100.FONT.NORML, '8'],
+             8: [Video.VT100.FONT.NORML, '9'],
+             9: [Video.VT100.FONT.NORML, '10'],
+            10: [Video.VT100.FONT.NORML, '11'],
+            11: [Video.VT100.FONT.NORML, '12'],
+            12: [Video.VT100.FONT.NORML, '13'],
+            13: [Video.VT100.FONT.NORML, '14'],
+            14: [Video.VT100.FONT.NORML, '15'],
+            15: [Video.VT100.FONT.NORML, '16'],
+            16: [Video.VT100.FONT.NORML, '17'],
+            17: [Video.VT100.FONT.NORML, '18'],
+            18: [Video.VT100.FONT.NORML, '19'],
+            19: [Video.VT100.FONT.NORML, '20'],
+            20: [Video.VT100.FONT.NORML, '21'],
+            21: [Video.VT100.FONT.NORML, '22'],
+            */
+            22: [Video.VT100.FONT.NORML, '        T       T       T       T       T       T       T       T       T'],
+            23: [Video.VT100.FONT.NORML, '1234567890', '1234567890', '1234567890', '1234567890', '1234567890', '1234567890', '1234567890', '1234567890'],
+            24: []
+        };
+        var addr = this.addrBuffer;
+        var addrNext = -1, font = -1;
+        var b, nFill = (this.rateMonitor == 60? 2 : 5);
+        for (var iRow = -nFill; iRow < this.nRowsBuffer; iRow++) {
+            var lineData = aLineData[iRow];
+            if (addrNext >= 0) {
+                var fBreak = false;
+                addrNext = addr + 2;
+                if (!lineData) {
+                    if (font == Video.VT100.FONT.DHIGH) {
+                        lineData = aLineData[iRow-1];
+                        font = Video.VT100.FONT.DHIGH_BOT;
+                    }
+                }
+                else {
+                    if (lineData.length) {
+                        font = lineData[0];
+                    } else {
+                        addrNext = addr - 1;
+                        fBreak = true;
+                    }
+                }
+                b = (font & Video.VT100.LINEATTR.FONTMASK) | ((addrNext >> 8) & Video.VT100.LINEATTR.ADDRMASK);
+                this.bus.setByteDirect(addr++, b);
+                this.bus.setByteDirect(addr++, addrNext & 0xff);
+                if (fBreak) break;
+            }
+            if (lineData) {
+                var attr = 0;
+                for (var j = 1; j < lineData.length; j++) {
+                    var s = lineData[j];
+                    for (var k = 0; k < s.length; k++) {
+                        this.bus.setByteDirect(addr++, s.charCodeAt(k) | attr);
+                    }
+                    attr ^= 0x80;
+                }
+            }
+            this.bus.setByteDirect(addr++, Video.VT100.LINETERM);
+            addrNext = addr;
+        }
+    }
+    return true;
+};
+
 /**
  * setBinding(sHTMLType, sBinding, control, sValue)
  *
@@ -695,7 +789,7 @@ Video.prototype.setFocus = function()
  */
 Video.prototype.getRefreshRate = function()
 {
-    return Math.max(this.refreshRate, this.interruptRate);
+    return Math.max(this.rateRefresh, this.rateInterrupt);
 };
 
 /**
@@ -788,6 +882,7 @@ Video.prototype.updateChar = function(idFont, col, row, data, context)
 {
     var bChar = data & 0x7f;
     var font = this.aFonts[idFont];
+    if (!font) return;
 
     var xSrc = (bChar & 0xf) * font.cxCell;
     var ySrc = (bChar >> 4) * font.cyCell;
@@ -848,7 +943,7 @@ Video.prototype.updateVT100 = function()
     var addrNext = this.addrBuffer, fontNext = -1;
 
     var nRows = 0;
-    var nFill = (this.nRefreshRate == 60? 2 : 5);
+    var nFill = (this.rateMonitor == 60? 2 : 5);
     this.assert(this.abLineBuffer.length == this.nColsBuffer);
 
     var iCell = 0, cUpdated = 0;
@@ -859,7 +954,7 @@ Video.prototype.updateVT100 = function()
         var nCols = 0;
         var addr = addrNext;
         var font = fontNext;
-        while (nCols < this.abLineBuffer.length) {
+        while (true) {
             var data = this.bus.getByteDirect(addr++);
             if ((data & Video.VT100.LINETERM) == Video.VT100.LINETERM) {
                 var b = this.bus.getByteDirect(addr++);
@@ -867,7 +962,11 @@ Video.prototype.updateVT100 = function()
                 addrNext = this.addrBuffer | ((b & Video.VT100.LINEATTR.ADDRMASK) << 8) | this.bus.getByteDirect(addr);
                 break;
             }
-            this.abLineBuffer[nCols++] = data;
+            if (nCols < this.abLineBuffer.length) {
+                this.abLineBuffer[nCols++] = data;
+            } else {
+                break;                          // ideally, we would wait for a LINETERM byte, but it's not safe to loop without limit
+            }
         }
 
         /*
@@ -894,7 +993,11 @@ Video.prototype.updateVT100 = function()
         for (var iCol = 0; iCol < nCols; iCol++) {
             data = this.abLineBuffer[iCol];
             if (!this.fCellCacheValid || data !== this.aCellCache[iCell]) {
-                this.updateChar(font, iCol, nRows, data, this.contextBuffer);
+                /*
+                 * TODO: If bit 8 is set, we must select a different font variation, depending on which per-character
+                 * screen attribute is currently enabled (ie, reverse video or underline).
+                 */
+                this.updateChar(font, iCol, nRows, data & 0x7f, this.contextBuffer);
                 cUpdated++;
             }
             iCell++;
@@ -905,7 +1008,11 @@ Video.prototype.updateVT100 = function()
     this.fCellCacheValid = true;
 
     if (cUpdated && this.contextBuffer) {
-        this.contextScreen.drawImage(this.canvasBuffer, 0, 0, this.cxBuffer, this.cyBuffer, this.xScreenOffset, this.yScreenOffset, this.cxScreenOffset, this.cyScreenOffset);
+        /*
+         * NOTE: We must subtract cyCell from cyBuffer to avoid displaying the extra row that we normally buffer
+         * in support of smooth-scrolling.
+         */
+        this.contextScreen.drawImage(this.canvasBuffer, 0, 0, this.cxBuffer, this.cyBuffer - this.cyCell, this.xScreenOffset, this.yScreenOffset, this.cxScreenOffset, this.cyScreenOffset);
     }
 };
 
@@ -930,7 +1037,7 @@ Video.prototype.updateScreen = function(n)
 
     if (n >= 0) {
 
-        if (this.interruptRate) {
+        if (this.rateInterrupt) {
             if (!(n & 1)) {
                 /*
                  * On even updates, call cpu.requestINTR(1), and also update our copy of the screen.
diff --git a/modules/pcx86/lib/defines.js b/modules/pcx86/lib/defines.js
index 9f82ffdd0..2e3f8aa35 100644
--- a/modules/pcx86/lib/defines.js
+++ b/modules/pcx86/lib/defines.js
@@ -172,7 +172,7 @@ var PCX86 = {
     SITEHOST:    SITEHOST,      // shared
     SYMBOLS:     SYMBOLS,
     XMLVERSION:  XMLVERSION     // shared
-}
+};
 
 if (NODE) {
     global.APPCLASS    = APPCLASS;
diff --git a/versions/pc8080/1.23.3/pc8080-dbg.js b/versions/pc8080/1.23.3/pc8080-dbg.js
index 796634925..5a7377543 100644
--- a/versions/pc8080/1.23.3/pc8080-dbg.js
+++ b/versions/pc8080/1.23.3/pc8080-dbg.js
@@ -1,221 +1,220 @@
-(function(){var m;function aa(a,b){var c;if(a){b||(b=16);if("$"==a.charAt(0))b=16,a=a.substr(1);else if("0x"==a.substr(0,2))b=16,a=a.substr(2);else{var d=a.charAt(a.length-1).toLowerCase();"h"==d?(b=16,d=null):"."==d&&(b=10,d=null);null==d&&(a=a.substr(0,a.length-1))}var e,d=a,f=b;(f&&10!=f?16==f?null!==d.match(/^[0-9a-f]+$/i):2==f&&null!==d.match(/^[01]+$/i):null!==d.match(/^[0-9]+$/))&&!isNaN(e=parseInt(a,b))&&(c=e|0)}return c}
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+function Dd(a){y.call(this,"ROM",a,Dd);this.u=null;this.H=a.addr;this.C=a.size;this.I=a.writable;this.w=a.alias;this.F=a.file;this.J=ca(this.F);if(this.F){a=this.F;var b=da(this.J);"json"!=b&&"hex"!=b&&(a=pa()+"/api/v1/dump?file="+this.F+"&format=bytes&decimal=true");var c=this;oa(a,null,!0,function(a,b,f){Ed(c,a,b,f)})}}Wa(Dd);var Fd=[0,5];Dd.prototype.Ka=function(a,b,c,d){this.B=b;this.b=c;this.G=d;Gd(this)};
+Dd.prototype.Ea=function(){if(this.Ja){if(this.G){var a=this.G,b=this.id,c=this.H,d=this.C,e=this.Ja,f=[],h;for(h in e){var g=e[h];"number"==typeof g&&(e[h]=g={o:g});var l=g.o,k=g.a;if(void 0!==l){var n=f,l=[l>>>0,h],p=ja(n,l,a.Ma);0>p&&n.splice(-(p+1),0,l)}k&&(g.a=k.replace(/''/g,'"'))}a.I.push({Ac:b,D:c,lc:d,Ja:e,Nb:f})}delete this.Ja}return!0};Dd.prototype.Ha=function(){return!0};
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+function Gd(a){if(!jb(a))if(!a.F)C(a);else if(a.u&&a.B){a.C||(a.C=a.u.length);if(a.u.length!=a.C)kb(a,"ROM size (0x"+q(a.u.length)+") does not match specified size ("+("0x"+q(a.C))+")");else if(Hd(a,a.H)){var b=[];"number"==typeof a.w?b.push(a.w):null!=a.w&&a.w.length&&(b=a.w);for(var c=0;c<b.length;c++){for(var d=a,e=b[c],f=d.B,h=d.C,g=[],l=d.H>>>f.ga;0<h&&l<f.U.length;)g.push(f.U[l++]),h-=f.Aa;f=d.B;d=d.C;h=0;for(e>>>=f.ga;0<d&&e<f.U.length;){l=g[h++];if(!l)break;f.U[e++]=l;d-=f.Aa}}delete a.u}C(a)}}
+function Hd(a,b){if(sb(a.B,b,a.C,a.I?1:Sb)){var c;for(c=0;c<a.u.length;c++)xb(a.B,b+c,a.u[c]);if(a.I&&256==b){for(c=0;c<Fd.length;c++)xb(a.B,Fd[c],118);Ec(a.b,function(a){return function(b){if(0<=Fd.indexOf(b)){var c=!1,h=a.b,g=a.G;if(5==b)switch(c=!0,h.P){case 2:Id(a,String.fromCharCode(h.S));break;case 9:for(var l=Lc(h),k="",n=255;n--;){var p=a.b.W(l++);if(36==p)break;k+=String.fromCharCode(p)}Id(a,k);break;default:c=!1}c?wd.call(h):g&&(a.g("\nCP/M vector "+t(b)),F(h,b),g.ea());b=!0}else b=!1;return b}}(a));
+Gc(a.b,b)}return!0}return!1}function Id(a,b){b=b.replace(/\r/g,"");a.za&&(a.za.value+=b,a.za.scrollTop=a.za.scrollHeight)}Ja(function(){for(var a=B(document,"pc8080","rom"),b=0;b<a.length;b++){var c=a[b],d=A(c),d=new Dd(d);ab(d,c)}});function Jd(a){y.call(this,"RAM",a,Jd);this.w=a.addr;this.C=a.size;this.u=!1}Wa(Jd);m=Jd.prototype;m.Ka=function(a,b,c,d){this.B=b;this.b=c;this.G=d;C(this)};m.Ea=function(a,b){b||this.reset();return!0};m.Ha=function(a){return a?this.save():!0};
+m.reset=function(){!this.u&&this.C&&sb(this.B,this.w,this.C,1)&&(this.u=!0);this.u||w("No RAM allocated")};m.save=function(){return null};m.restore=function(){return!0};Ja(function(){for(var a=B(document,"pc8080","ram"),b=0;b<a.length;b++){var c=a[b],d=A(c),d=new Jd(d);ab(d,c)}});function Kd(a){y.call(this,"Keyboard",a,Kd,65536);this.reset();C(this)}Wa(Kd);var Ld={"1p":49,"2p":50,coin:51,left:37,right:39,fire:32},Md={65:37,68:39,76:32};Kd.prototype.reset=function(){this.b={}};
+Kd.prototype.oa=function(a,b,c){var d=this;a=a+"-"+b;if(void 0===this.L[a])switch(b){case "kbd":return c.onkeydown=function(a){return Nd(d,a,!0)},c.onkeyup=function(a){return Nd(d,a,!1)},!0;default:if(void 0!==Ld[b])return this.L[a]=c,a=function(a,b){return function(){Od(a,b,!0)}}(this,b),b=function(a,b){return function(){Od(a,b,!1)}}(this,b),"ontouchstart"in window?(c.ontouchstart=a,c.ontouchend=b):(c.onmousedown=a,c.onmouseup=c.onmouseout=b),!0}return!1};
+Kd.prototype.Ka=function(a,b,c,d){this.G=d;this.C=ob(a,"ChipSet")};function Nd(a,b,c){var d=!0,e;a:{e=b.keyCode;e=Md[e]||e;for(var f in Ld)if(Ld[f]===e){e=f;break a}e=null}e&&(d=Od(a,e,c));d||b.preventDefault();return d}function Od(a,b,c){a.b[b]=c;if(a.C)switch(b){case "1p":Cd(a.C,4,c);break;case "2p":Cd(a.C,2,c);break;case "coin":Cd(a.C,1,c);break;case "left":Cd(a.C,32,c);break;case "right":Cd(a.C,64,c);break;case "fire":Cd(a.C,16,c)}return!1}
+Ja(function(){for(var a=B(document,"pc8080","keyboard"),b=0;b<a.length;b++){var c=a[b],d=A(c),d=new Kd(d);ab(d,c)}});
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+this.pa={},this.Ca=1<<this.Ia,this.qa=Array(this.Ca+2),this.qa[0]=[0,0,0,255],this.qa[1]=[255,255,255,255],1==this.ca&&(this.qa[this.Ca+0]=[255,255,0,255],this.qa[this.Ca+1]=[0,255,0,255]),2==this.ca&&(this.xc=60,this.ta=Array(this.Ma));(this.ya=ob(a,"Keyboard"))&&this.N&&this.ya.oa(this.zc?"textarea":"canvas","kbd",this.xa);this.fa||C(this)};
+function Td(a,b,c,d){if(d)a.ha("Unable to load font ROM (error "+d+": "+b+")");else{Ya(a.Fb,b,c);try{var e=eval("("+c+")"),f=e.bytes||e;if(!f||!f.length){w("Empty font ROM: "+b);return}if(1==f.length){w(f[0]);return}if(2048==f.length)Vd(a,f);else{a.ha("Unrecognized font data length ("+f.length+")");return}}catch(h){a.ha("Font ROM data error: "+h.message);return}(a.H||a.G)&&C(a)}}function Vd(a,b){a.Va=b;a.pa[96]=Wd(a,a.ua,a.la);a.pa[64]=Wd(a,2*a.ua,a.la);a.pa[32]=a.pa[0]=Wd(a,2*a.ua,2*a.la)}
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+Ja(function(){for(var a=B(document,"pc8080","video"),b=0;b<a.length;b++){var c=a[b],d=A(c),e=document.createElement("canvas");if(void 0===e||!e.getContext){c.innerHTML="<br/>Missing &lt;canvas&gt; support. Please try a newer web browser.";break}e.setAttribute("class","pcjs-canvas");e.setAttribute("width",d.screenWidth);e.setAttribute("height",d.screenHeight);e.style.backgroundColor=d.screenColor;e.style.height="auto";0<=qa().indexOf("MSIE")&&(c.onresize=function(a,b,c,d){return function(){b.style.height=
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+function Yd(a){y.call(this,"Debugger",a,Yd);this.style=Zd;this.ca=this.ya=this.K=0;this.X=U();this.Na=U();this.F=-1;this.w=[];this.ia=!1;this.fa=U();this.I=[];this.pa={};this.C=this.Z=this.H=[];$d(this);this.va=0;ae(this);this.Ca=[];be(this,a.messages);this.Da=a.commands;var b=this;window?void 0===window.$&&(window.$=function(a){return sc(b,a)}):void 0===global.$&&(global.$=function(a){return sc(b,a)})}Wa(Yd);
+var ce={"?":"help/print","a [#]":"assemble","b [#]":"breakpoint",c:"clear output","d [#]":"dump memory","e [#]":"edit memory",f:"frequencies","g [#]":"go [to #]",h:"halt","i [#]":"input port #","if":"eval expression",k:"stack trace",ln:"list nearest symbol(s)",m:"messages","o [#]":"output port #",p:"step over",print:"print expression",r:"dump/set registers",reset:"reset machine",s:"set options","t [#]":"trace","u [#]":"unassemble",v:"print version","var":"assign variable"},Zd=8080,de="NONE ACI ADC ADD ADI ANA ANI CALL CC CM CNC CNZ CP CPE CPO CZ CMA CMC CMP CPI DAA DAD DCR DCX DI EI HLT IN INR INX JMP JC JM JNC JNZ JP JPE JPO JZ LDA LDAX LHLD LXI MOV MVI NOP ORA ORI OUT PCHL POP PUSH RAL RAR RET RC RM RNC RNZ RP RPE RPO RZ RLC RRC RST SBB SBI SHLD SPHL STA STAX STC SUB SUI XCHG XRA XRI XTHL".split(" "),
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+ta(function(){for(var a=D(document,"pc8080","video"),b=0;b<a.length;b++){var c=a[b],d=C(c),e=document.createElement("canvas");if(void 0===e||!e.getContext){c.innerHTML="<br/>Missing &lt;canvas&gt; support. Please try a newer web browser.";break}e.setAttribute("class","pcjs-canvas");e.setAttribute("width",d.screenWidth);e.setAttribute("height",d.screenHeight);e.style.backgroundColor=d.screenColor;e.style.height="auto";0<=(window?window.navigator.userAgent:"").indexOf("MSIE")&&(c.onresize=function(a,
+b,c,d){return function(){b.style.height=(a.clientWidth*d/c|0)+"px"}}(c,e,d.screenWidth,d.screenHeight),c.onresize());var f=+(d.aspect||ya.aspect);f&&.3<=f&&3.33>=f&&(sa("onresize",function(a,b,c){return function(){b.style.height=(a.clientWidth/c|0)+"px"}}(c,e,f)),window.onresize());c.appendChild(e);f=document.createElement("textarea");oa("iOS")&&(f.setAttribute("autocapitalize","off"),f.setAttribute("autocorrect","off"));c.appendChild(f);var h=e.getContext("2d"),d=new oc(d,e,h,f,c);Ha(d,c)}});
+function J(a,b,c){this.id=a.id;this.key=xc(a,b,c);this.J=a.J;yc(this,a.ob)}function xc(a,b,c){a=a.id;if(b){var d=b.indexOf(".");0<d&&(a+=".v"+b.substr(0,d))}c&&(a+="."+c);return a}
+J.prototype={constructor:J,value:function(){return this[this.id]},data:function(){return this[this.id]},toString:function(){var a=this[this.id];return"string"==typeof a?a:JSON.stringify(a)},clear:function(a){yc(this);var b=[];try{for(var c=0,d=window.localStorage.length;c<d;c++)b.push(window.localStorage.key(c))}catch(e){}for(c=0;c<b.length;c++)if((d=b[c])&&(a||d.substr(0,this.key.length)==this.key)){try{window.localStorage.removeItem(d)}catch(e){}b.splice(c,1);c=0}}};
+function yc(a,b){a[a.id]={};b&&K(a,"parms",b);a.a=!1}function zc(a){var b=!0;if(la()){var c=JSON.stringify(a[a.id]);na(a.key,c)||(t("Unable to store "+c.length+" bytes in browser local storage"),b=!1)}return b}function Ac(a){var b=!0;try{a[a.id]=JSON.parse(a[a.id])}catch(c){t(c.message||c),b=!1}return b}function Bc(a,b){return b?(a[a.id]=b,a.a=!0):a.a?!0:la()&&(b=ma(a.key))?(a[a.id]=b,a.a=!0):!1}function Cc(a,b){return a[a.id][b]||null}function K(a,b,c){try{a[a.id][b]=c}catch(d){}}
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