From 21fc2e0639991ddc75fdbee38c20e43f06e4e93f Mon Sep 17 00:00:00 2001
From: Jeff Parsons <jeff@pcjs.org>
Date: Fri, 29 Jul 2016 18:03:00 -0700
Subject: [PATCH] More VT100 video support (untested)

---
 devices/pc8080/machine/vt100/README.md   |  12 +-
 devices/pc8080/machine/vt100/machine.xml |   3 +-
 docs/pcx86/examples/components.xsl       |  20 +-
 modules/pc8080/lib/video.js              | 404 ++++++++++++++++------
 modules/shared/templates/components.xsl  |  20 +-
 versions/pc8080/1.23.3/components.xsl    |  20 +-
 versions/pc8080/1.23.3/pc8080-dbg.js     | 414 ++++++++++++-----------
 versions/pc8080/1.23.3/pc8080.js         | 265 ++++++++-------
 versions/pcx86/1.23.3/components.xsl     |  20 +-
 9 files changed, 734 insertions(+), 444 deletions(-)

diff --git a/devices/pc8080/machine/vt100/README.md b/devices/pc8080/machine/vt100/README.md
index dafff42f9..8eb8deaa7 100644
--- a/devices/pc8080/machine/vt100/README.md
+++ b/devices/pc8080/machine/vt100/README.md
@@ -49,13 +49,17 @@ 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" ...>
 
-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.
+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
+uses a 9x10 character cell instead, and assuming no AVO expansion card is present, there is only enough screen RAM available
+for 14 rows of characters; this implies a total of 1188 dots displayed per horizontal scan, and a total of only 140 horizontal
+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 screen, so I've changed the test
-machine's screen dimensions to 1600x800.
+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.
 
 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
diff --git a/devices/pc8080/machine/vt100/machine.xml b/devices/pc8080/machine/vt100/machine.xml
index cbbb10173..647d2d089 100644
--- a/devices/pc8080/machine/vt100/machine.xml
+++ b/devices/pc8080/machine/vt100/machine.xml
@@ -6,7 +6,8 @@
 	<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" fontROM="/devices/pc8080/rom/vt100/23-018E2.json"
+	<video id="video" screenWidth="1600" screenHeight="800" 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>
 			<title>VT100 Screen</title>
diff --git a/docs/pcx86/examples/components.xsl b/docs/pcx86/examples/components.xsl
index f795266e8..87d96d0bf 100644
--- a/docs/pcx86/examples/components.xsl
+++ b/docs/pcx86/examples/components.xsl
@@ -1061,6 +1061,18 @@
 				<xsl:otherwise>false</xsl:otherwise>
 			</xsl:choose>
 		</xsl:variable>
+		<xsl:variable name="cellWidth">
+			<xsl:choose>
+				<xsl:when test="@cellWidth"><xsl:value-of select="@cellWidth"/></xsl:when>
+				<xsl:otherwise>1</xsl:otherwise>
+			</xsl:choose>
+		</xsl:variable>
+		<xsl:variable name="cellHeight">
+			<xsl:choose>
+				<xsl:when test="@cellHeight"><xsl:value-of select="@cellHeight"/></xsl:when>
+				<xsl:otherwise>1</xsl:otherwise>
+			</xsl:choose>
+		</xsl:variable>
 		<xsl:variable name="charCols">
 			<xsl:choose>
 				<xsl:when test="@cols"><xsl:value-of select="@cols"/></xsl:when>
@@ -1083,6 +1095,12 @@
 				<xsl:otherwise/>
 			</xsl:choose>
 		</xsl:variable>
+		<xsl:variable name="fontColor">
+			<xsl:choose>
+				<xsl:when test="@fontColor"><xsl:value-of select="@fontColor"/></xsl:when>
+				<xsl:otherwise/>
+			</xsl:choose>
+		</xsl:variable>
 		<xsl:variable name="touchScreen">
 			<xsl:choose>
 				<xsl:when test="@touchscreen"><xsl:value-of select="@touchscreen"/></xsl:when>
@@ -1125,7 +1143,7 @@
 		<xsl:call-template name="component">
 			<xsl:with-param name="machine" select="$machine"/>
 			<xsl:with-param name="class">video</xsl:with-param>
-			<xsl:with-param name="parms">,model:'<xsl:value-of select="$model"/>',mode:<xsl:value-of select="$mode"/>,screenWidth:<xsl:value-of select="$screenWidth"/>,screenHeight:<xsl:value-of select="$screenHeight"/>,screenColor:'<xsl:value-of select="$screenColor"/>',screenRotate:<xsl:value-of select="$screenRotate"/>,bufferAddr:<xsl:value-of select="$bufferAddr"/>,bufferRAM:<xsl:value-of select="$bufferRAM"/>,bufferFormat:'<xsl:value-of select="$bufferFormat"/>',bufferCols:<xsl:value-of select="$bufferCols"/>,bufferRows:<xsl:value-of select="$bufferRows"/>,bufferBits:<xsl:value-of select="$bufferBits"/>,bufferLeft:<xsl:value-of select="$bufferLeft"/>,bufferRotate:<xsl:value-of select="$bufferRotate"/>,memory:<xsl:value-of select="$memory"/>,switches:'<xsl:value-of select="$switches"/>',scale:<xsl:value-of select="$scale"/>,charCols:<xsl:value-of select="$charCols"/>,charRows:<xsl:value-of select="$charRows"/>,fontROM:'<xsl:value-of select="$fontROM"/>',touchScreen:'<xsl:value-of select="$touchScreen"/>',autoLock:<xsl:value-of select="$autoLock"/>,aspectRatio:<xsl:value-of select="$aspectRatio"/>,smoothing:<xsl:value-of select="$smoothing"/>,interruptRate:<xsl:value-of select="$interruptRate"/>,refreshRate:<xsl:value-of select="$refreshRate"/></xsl:with-param>
+			<xsl:with-param name="parms">,model:'<xsl:value-of select="$model"/>',mode:<xsl:value-of select="$mode"/>,screenWidth:<xsl:value-of select="$screenWidth"/>,screenHeight:<xsl:value-of select="$screenHeight"/>,screenColor:'<xsl:value-of select="$screenColor"/>',screenRotate:<xsl:value-of select="$screenRotate"/>,bufferAddr:<xsl:value-of select="$bufferAddr"/>,bufferRAM:<xsl:value-of select="$bufferRAM"/>,bufferFormat:'<xsl:value-of select="$bufferFormat"/>',bufferCols:<xsl:value-of select="$bufferCols"/>,bufferRows:<xsl:value-of select="$bufferRows"/>,bufferBits:<xsl:value-of select="$bufferBits"/>,bufferLeft:<xsl:value-of select="$bufferLeft"/>,bufferRotate:<xsl:value-of select="$bufferRotate"/>,memory:<xsl:value-of select="$memory"/>,switches:'<xsl:value-of select="$switches"/>',scale:<xsl:value-of select="$scale"/>,cellWidth:<xsl:value-of select="$cellWidth"/>,cellHeight:<xsl:value-of select="$cellHeight"/>,charCols:<xsl:value-of select="$charCols"/>,charRows:<xsl:value-of select="$charRows"/>,fontROM:'<xsl:value-of select="$fontROM"/>',fontColor:'<xsl:value-of select="$fontColor"/>',touchScreen:'<xsl:value-of select="$touchScreen"/>',autoLock:<xsl:value-of select="$autoLock"/>,aspectRatio:<xsl:value-of select="$aspectRatio"/>,smoothing:<xsl:value-of select="$smoothing"/>,interruptRate:<xsl:value-of select="$interruptRate"/>,refreshRate:<xsl:value-of select="$refreshRate"/></xsl:with-param>
 		</xsl:call-template>
 	</xsl:template>
 
diff --git a/modules/pc8080/lib/video.js b/modules/pc8080/lib/video.js
index 8ac0299ff..db8096ffa 100644
--- a/modules/pc8080/lib/video.js
+++ b/modules/pc8080/lib/video.js
@@ -63,6 +63,13 @@ if (NODE) {
  *      interruptRate: normally the same as (or some multiple of) refreshRate (eg, 120)
  *      refreshRate: how many times updateScreen() should be performed per second (eg, 60)
  *
+ *  In addition, if a text-only display is being emulated, define the following properties:
+ *
+ *      fontROM: URL of font ROM
+ *      fontColor: default is white
+ *      cellWidth: number (eg, 10 for VT100)
+ *      cellHeight: number (eg, 10 for VT100)
+ *
  * We record all the above values now, but we defer creation of the frame buffer until our initBus()
  * handler is called.  At that point, we will also compute the extent of the frame buffer, determine the
  * appropriate "cell" size (ie, the number of pixels that updateScreen() will fetch and process at once),
@@ -77,7 +84,7 @@ if (NODE) {
  * bufferRotate is an alternative to screenRotate; you may set one or the other (but not both) to -90 to
  * enable different approaches to counter-clockwise 90-degree image rotation.  screenRotate uses canvas
  * transformation methods (translate(), rotate(), and scale()), while bufferRotate inverts the dimensions
- * of the off-screen buffer and then relies on setPixel() to "rotate" the data into it.
+ * of the off-screen buffer and then relies on setPixel() to "rotate" the data into the proper location.
  *
  * @constructor
  * @extends Component
@@ -104,10 +111,16 @@ function Video(parmsVideo, canvas, context, textarea, container)
     var sFormat = parmsVideo['bufferFormat'];
     this.nFormat = sFormat && Video.FORMATS[sFormat.toLowerCase()] || Video.FORMAT.UNKNOWN;
 
-    this.cxBuffer = parmsVideo['bufferCols'];
-    this.cyBuffer = parmsVideo['bufferRows'];
+    this.nColsBuffer = parmsVideo['bufferCols'];
+    this.nRowsBuffer = parmsVideo['bufferRows'];
+
+    this.cxCellDefault = this.cxCell = parmsVideo['cellWidth'] || 1;
+    this.cyCellDefault = this.cyCell = parmsVideo['cellHeight'] || 1;
+    this.abFontData = null;
+
     this.nBitsPerPixel = parmsVideo['bufferBits'] || 1;
     this.iBitFirstPixel = parmsVideo['bufferLeft'] || 0;
+
     this.rotateBuffer = parmsVideo['bufferRotate'];
     if (this.rotateBuffer) {
         this.rotateBuffer = this.rotateBuffer % 360;
@@ -126,6 +139,10 @@ function Video(parmsVideo, canvas, context, textarea, container)
     this.textareaScreen = textarea;
     this.inputScreen = textarea || canvas || null;
 
+    this.xScreenOffset = this.yScreenOffset = 0;
+    this.cxScreenCell = (this.cxScreen / this.nColsBuffer)|0;
+    this.cyScreenCell = (this.cyScreen / this.nRowsBuffer)|0;
+
     /*
      * Support for disabling (or, less commonly, enabling) image smoothing, which all browsers
      * seem to support now (well, OK, I still have to test the latest MS Edge browser), despite
@@ -155,6 +172,10 @@ function Video(parmsVideo, canvas, context, textarea, container)
     if (this.rotateScreen) {
         this.rotateScreen = this.rotateScreen % 360;
         if (this.rotateScreen > 0) this.rotateScreen -= 360;
+        /*
+         * TODO: Consider also disallowing any rotateScreen value if bufferRotate was already set; setting
+         * both is most likely a mistake, but perhaps it's also a legitimate way of enabling 180-degree rotation?
+         */
         if (this.rotateScreen != -90) {
             this.notice("unsupported screen rotation: " + this.rotateScreen);
             this.rotateScreen = 0;
@@ -165,23 +186,7 @@ function Video(parmsVideo, canvas, context, textarea, container)
         }
     }
 
-    this.initColors();
-
-    /*
-     * Allocate off-screen buffers.
-     */
-    var cxBuffer = this.cxBuffer;
-    var cyBuffer = this.cyBuffer;
-    if (this.rotateBuffer) {
-        cxBuffer = this.cyBuffer;
-        cyBuffer = this.cxBuffer;
-    }
-
-    this.imageBuffer = this.contextScreen.createImageData(cxBuffer, cyBuffer);
-    this.canvasBuffer = document.createElement("canvas");
-    this.canvasBuffer.width = cxBuffer;
-    this.canvasBuffer.height = cyBuffer;
-    this.contextBuffer = this.canvasBuffer.getContext("2d");
+    this.initBuffers();
 
     /*
      * Here's the gross code to handle full-screen support across all supported browsers.  The lack of standards
@@ -248,6 +253,61 @@ Video.FORMATS = {
     "vt100":        Video.FORMAT.VT100
 };
 
+
+Video.VT100 = {
+    FONT: {
+        NORML:      0,
+        DWIDE:      1,
+        DHIGH:      2
+    },
+    LINETERM:       0x7F,
+    LINEATTR: {
+        MASK:       0xE0,
+        SCROLL:     0x80,
+        ADDRMASK:   0x1F,
+        FONTMASK:   0x60,
+        NORML:      0x60,
+        DWIDE:      0x40,
+        DHIGH_TOP:  0x20,
+        DHIGH_BOT:  0x00
+    }
+};
+
+/**
+ * initBuffers()
+ */
+Video.prototype.initBuffers = function()
+{
+    /*
+     * Allocate off-screen buffers now
+     */
+    this.cxBuffer = this.nColsBuffer * this.cxCell;
+    this.cyBuffer = this.nRowsBuffer * this.cyCell;
+
+    var cxBuffer = this.cxBuffer;
+    var cyBuffer = this.cyBuffer;
+    if (this.rotateBuffer) {
+        cxBuffer = this.cyBuffer;
+        cyBuffer = this.cxBuffer;
+    }
+
+    this.imageBuffer = this.contextScreen.createImageData(cxBuffer, cyBuffer);
+    this.canvasBuffer = document.createElement("canvas");
+    this.canvasBuffer.width = cxBuffer;
+    this.canvasBuffer.height = cyBuffer;
+    this.contextBuffer = this.canvasBuffer.getContext("2d");
+
+    this.initColors();
+
+    if (this.cxCell > 1) {
+        this.aFonts = {};
+        this.abLineBuffer = new Array(132);
+        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.createFontVariation(this.cxCell*2, this.cyCell*2);
+    }
+};
+
 /**
  * initBus(cmp, bus, cpu, dbg)
  *
@@ -336,74 +396,10 @@ Video.prototype.doneLoad = function(sURL, sFontData, nErrorCode)
         }
 
         /*
-         * Translate the character data into separate "fonts", each of which will be a separate canvas object, with all
-         * 256 characters arranged in a 16x16 grid.
+         * Minimal font data validation, just to make sure we're not getting garbage from the server...
          */
         if (ab.length == 2048) {
-            /*
-             * The assumption here is that we're dealing with the original (IBM) MDA/CGA font data, which apparently
-             * was identical on both MDA and CGA cards (even though the former had no use for the latter, and vice versa).
-             *
-             * First, let's take a look at the MDA portion of the data.  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....|
-             *      ...
-             *      00000800  00 00 00 00 00 00 00 00  99 81 7e 00 00 00 00 00  |..........~.....|
-             *      00000810  e7 ff 7e 00 00 00 00 00  3e 1c 08 00 00 00 00 00  |..~.....>.......|
-             *
-             * 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
-             *      1 0 0 0 0 0 0 1  <== 81 from offset 0x000B
-             *      1 0 1 0 0 1 0 1  <== a5 from offset 0x000C
-             *      1 0 0 0 0 0 0 1  <== 81 from offset 0x000D
-             *      1 0 0 0 0 0 0 1  <== 81 from offset 0x000E
-             *      1 0 1 1 1 1 0 1  <== bd from offset 0x000F
-             *      1 0 0 1 1 0 0 1  <== 99 from offset 0x0808
-             *      1 0 0 0 0 0 0 1  <== 81 from offset 0x0809
-             *      0 1 1 1 1 1 1 0  <== 7e from offset 0x080A
-             *      0 0 0 0 0 0 0 0  <== 00 from offset 0x080B
-             *      0 0 0 0 0 0 0 0  <== 00 from offset 0x080C
-             *      0 0 0 0 0 0 0 0  <== 00 from offset 0x080D
-             *      0 0 0 0 0 0 0 0  <== 00 from offset 0x080E
-             *      0 0 0 0 0 0 0 0  <== 00 from offset 0x080F
-             *
-             * 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 [sic] through 0xDF."
-             *
-             * However, the above text is mistaken about the start of the range.  While there ARE line-drawing characters
-             * in the range 0xB0-0xBF, none of them extend all the way to the right edge; IBM carefully segregated them.
-             * And in fact, characters 0xB0-0xB2 contain hash patterns that you would NOT want extended into the 9th column.
-             *
-             * 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 may provide a virtual jumper setting that allows you to select the thinner font).
-             *
-             * The first offset we must pass to setFontData() is the offset of the CGA font; we choose the thicker "double dot"
-             * CGA font at 0x1800 (which was the PC's default font as well), instead of the thinner "single dot" font at 0x1000.
-             * The second offset is for the MDA font.
-             */
-            // this.setFontData(ab);
+            this.abFontdata = ab;
         }
         else {
             this.notice("Unrecognized font data length (" + ab.length + ")");
@@ -424,6 +420,87 @@ Video.prototype.doneLoad = function(sURL, sFontData, nErrorCode)
     if (this.contextScreen || this.dbg) this.setReady();
 };
 
+/**
+ * createFontVariation(cxCell, cyCell, rgbOn, fUnderline, fReverse)
+ *
+ * This creates a 16x16 character grid for the requested font variation.  Variations include:
+ *
+ *      1) no variation (cell size is this.cxCell x this.cyCell)
+ *      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
+ *
+ * @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]
+ * @return {Object}
+ */
+Video.prototype.createFontVariation = function(cxCell, cyCell, rgbOn, fUnderline, fReverse)
+{
+    /*
+     * On a VT100, cxCell,cyCell is initially 10,10, but may change to 9,10 for 132-column mode.
+     * However, regardless of mode, cxCellDefault,cyCellDefault retain the initial values of 10,10.
+     */
+    this.assert(cxCell == this.cxCell || cxCell == this.cxCell*2);
+    this.assert(cyCell == this.cyCell || cyCell == this.cyCell*2);
+
+    /*
+     * Create a font canvas that is both 16 times the target character width and the target character height,
+     * ensuring that it will accommodate 16x16 characters (for a maximum of 256).  Note that the VT100 font ROM
+     * defines only 128 characters, so that canvas will contain only 16x8 entries.
+     */
+    var nFontBytesPerChar = this.cxCellDefault <= 8? 8 : 16;
+    var nFontByteOffset = nFontBytesPerChar > 8? 15 : 0;
+    var nChars = this.abFontData.length / nFontBytesPerChar;
+
+    var font = {cxCell: cxCell, cyCell: cyCell};
+    font.canvas = document.createElement("canvas");
+    font.canvas.width = cxCell * 16;
+    font.canvas.height = cyCell * (nChars / 16);
+    font.context = font.canvas.getContext("2d");
+
+    var imageChar = font.context.createImageData(cxCell, cyCell);
+
+    for (var iChar = 0; iChar < nChars; iChar++) {
+        for (var y = 0, yDst = y; y < this.cyCell; y++) {
+            var offFontData = iChar * nFontBytesPerChar + ((nFontByteOffset + y) & (nFontBytesPerChar - 1));
+            var b = this.abFontData[offFontData];
+            for (var nRows = 0; nRows < (cyCell / this.cyCell); nRows++) {
+                for (var x = 0, xDst = x; x < this.cxCell; x++) {
+                    var bit = b & (0x80 >> x);
+                    for (var nCols = 0; nCols < (cxCell / this.cxCell); nCols++) {
+                        this.setPixel(imageChar, xDst, yDst, bit? 1 : 0);
+                        xDst++;
+                    }
+                }
+                yDst++;
+            }
+        }
+        /*
+         * (iChar >> 4) performs the integer equivalent of Math.floor(iChar / 16), and (iChar & 0xf) is the equivalent of (iChar % 16).
+         */
+        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;
+};
+
 /**
  * setBinding(sHTMLType, sBinding, control, sValue)
  *
@@ -637,6 +714,47 @@ Video.prototype.setPixel = function(imageBuffer, x, y, bPixel)
     imageBuffer.data[index+3] = rgb[3];
 };
 
+/**
+ * updateChar(font, col, row, data, context)
+ *
+ * Updates a particular character cell (row,col) in the associated window.
+ *
+ * @this {Video}
+ * @param {Object} font
+ * @param {number} col
+ * @param {number} row
+ * @param {number} data
+ * @param {Object} [context]
+ */
+Video.prototype.updateChar = function(font, col, row, data, context)
+{
+    /*
+     * The caller MUST promise this.nFont is defined, and that the font in this.aFonts[this.nFont] has been loaded.
+     */
+    var xDst, yDst;
+    var bChar = data & 0x7f;
+
+    if (context) {
+        xDst = col * font.cxCell;
+        yDst = row * font.cyCell;
+    } else {
+        xDst = col * this.cxScreenCell + this.xScreenOffset;
+        yDst = row * this.cyScreenCell + this.yScreenOffset;
+    }
+
+    /*
+     * (bChar & 0xf) is the equivalent of (bChar % 16), and (bChar >> 4) is the equivalent of Math.floor(bChar / 16)
+     */
+    var xSrc = (bChar & 0xf) * font.cxCell;
+    var ySrc = (bChar >> 4) * font.cyCell;
+
+    if (context) {
+        context.drawImage(font.canvas, xSrc, ySrc, font.cxCell, font.cyCell, xDst, yDst, font.cxCell, font.cyCell);
+    } else {
+        this.contextScreen.drawImage(font.canvas, xSrc, ySrc, font.cxCell, font.cyCell, xDst, yDst, this.cxScreenCell, this.cyScreenCell);
+    }
+};
+
 /**
  * updateScreen(n)
  *
@@ -657,19 +775,22 @@ Video.prototype.updateScreen = function(n)
     var fUpdate = true;
 
     if (n >= 0) {
-        if (!(n & 1)) {
-            /*
-             * On even updates, call cpu.requestINTR(1), and also update our copy of the screen.
-             */
-            this.cpu.requestINTR(1);
-        } else {
-            /*
-             * On odd updates, call cpu.requestINTR(2), but do NOT update our copy of the screen, because
-             * the machine has presumably only updated the top half of the frame buffer at this point; it will
-             * update the bottom half of the frame buffer after acknowledging this interrupt.
-             */
-            this.cpu.requestINTR(2);
-            fUpdate = false;
+
+        if (this.interruptRate) {
+            if (!(n & 1)) {
+                /*
+                 * On even updates, call cpu.requestINTR(1), and also update our copy of the screen.
+                 */
+                this.cpu.requestINTR(1);
+            } else {
+                /*
+                 * On odd updates, call cpu.requestINTR(2), but do NOT update our copy of the screen, because
+                 * the machine has presumably only updated the top half of the frame buffer at this point; it will
+                 * update the bottom half of the frame buffer after acknowledging this interrupt.
+                 */
+                this.cpu.requestINTR(2);
+                fUpdate = false;
+            }
         }
 
         /*
@@ -688,8 +809,93 @@ Video.prototype.updateScreen = function(n)
         this.nCyclesPrev = nCycles;
         this.printMessage("updateScreen(" + n + "): clean=" + fClean + ", update=" + fUpdate + ", cycles=" + nCycles + ", delta=" + nCyclesDelta);
     }
+
     if (!fUpdate) return;
 
+    if (this.cxCell > 1) {
+        this.updateScreenText();
+    } else {
+        this.updateScreenGraphics();
+    }
+};
+
+/**
+ * updateScreenText()
+ *
+ * @this {Video}
+ */
+Video.prototype.updateScreenText = function()
+{
+    switch(this.nFormat) {
+    case Video.FORMAT.VT100:
+        this.updateScreenVT100();
+        break;
+    }
+};
+
+/**
+ * updateScreenVT100()
+ *
+ * @this {Video}
+ */
+Video.prototype.updateScreenVT100 = function()
+{
+    var addrNext = this.addrBuffer, attrNext = -1;
+
+    for (var iRow = 0; iRow < this.nRowsBuffer+1; iRow++) {
+        /*
+         * Fill the line buffer
+         */
+        var cbCols = 0;
+        var addr = addrNext;
+        var attr = attrNext;
+        while (cbCols < this.abLineBuffer.length) {
+            var data = this.bus.getByteDirect(addr++);
+            if ((data & Video.VT100.LINETERM) == Video.VT100.LINETERM) {
+                var b = this.bus.getByteDirect(addr++);
+                attrNext = b & Video.VT100.LINEATTR.FONTMASK;
+                addrNext = this.addrBuffer | ((b & Video.VT100.LINEATTR.ADDRMASK) << 8) | this.bus.getByteDirect(addr);
+                break;
+            }
+            this.abLineBuffer[cbCols++] = data;
+        }
+        /*
+         * Display the line buffer
+         */
+        if (attr >= 0) {
+            var idFont, cyClip = 0;
+            switch(attr) {
+            case Video.VT100.LINEATTR.NORML:
+                idFont = Video.VT100.FONT.NORML;
+                break;
+            case Video.VT100.LINEATTR.DWIDE:
+                idFont = Video.VT100.FONT.DWIDE;
+                break;
+            case Video.VT100.LINEATTR.DHIGH_TOP:
+                idFont = Video.VT100.FONT.DHIGH;
+                break;
+            case Video.VT100.LINEATTR.DHIGH_BOT:
+                idFont = Video.VT100.FONT.DHIGH;
+                cyClip = this.cyCell;
+                break;
+            }
+            var font = this.aFonts[idFont];
+            if (font) {
+                for (var iCol = 0; iCol < cbCols; iCol++) {
+                    this.updateChar(font, iCol, iRow-1, this.abLineBuffer[iCol], this.contextBuffer);
+                }
+            }
+        }
+    }
+};
+
+/**
+ * updateScreenGraphics()
+ *
+ * @this {Video}
+ */
+Video.prototype.updateScreenGraphics = function()
+{
     var addr = this.addrBuffer;
     var addrLimit = addr + this.sizeBuffer;
 
diff --git a/modules/shared/templates/components.xsl b/modules/shared/templates/components.xsl
index 5d6c4d0d2..0b0451c04 100644
--- a/modules/shared/templates/components.xsl
+++ b/modules/shared/templates/components.xsl
@@ -1068,6 +1068,18 @@
 				<xsl:otherwise>false</xsl:otherwise>
 			</xsl:choose>
 		</xsl:variable>
+		<xsl:variable name="cellWidth">
+			<xsl:choose>
+				<xsl:when test="@cellWidth"><xsl:value-of select="@cellWidth"/></xsl:when>
+				<xsl:otherwise>1</xsl:otherwise>
+			</xsl:choose>
+		</xsl:variable>
+		<xsl:variable name="cellHeight">
+			<xsl:choose>
+				<xsl:when test="@cellHeight"><xsl:value-of select="@cellHeight"/></xsl:when>
+				<xsl:otherwise>1</xsl:otherwise>
+			</xsl:choose>
+		</xsl:variable>
 		<xsl:variable name="charCols">
 			<xsl:choose>
 				<xsl:when test="@cols"><xsl:value-of select="@cols"/></xsl:when>
@@ -1090,6 +1102,12 @@
 				<xsl:otherwise/>
 			</xsl:choose>
 		</xsl:variable>
+		<xsl:variable name="fontColor">
+			<xsl:choose>
+				<xsl:when test="@fontColor"><xsl:value-of select="@fontColor"/></xsl:when>
+				<xsl:otherwise/>
+			</xsl:choose>
+		</xsl:variable>
 		<xsl:variable name="touchScreen">
 			<xsl:choose>
 				<xsl:when test="@touchscreen"><xsl:value-of select="@touchscreen"/></xsl:when>
@@ -1132,7 +1150,7 @@
 		<xsl:call-template name="component">
 			<xsl:with-param name="machine" select="$machine"/>
 			<xsl:with-param name="class">video</xsl:with-param>
-			<xsl:with-param name="parms">,model:'<xsl:value-of select="$model"/>',mode:<xsl:value-of select="$mode"/>,screenWidth:<xsl:value-of select="$screenWidth"/>,screenHeight:<xsl:value-of select="$screenHeight"/>,screenColor:'<xsl:value-of select="$screenColor"/>',screenRotate:<xsl:value-of select="$screenRotate"/>,bufferAddr:<xsl:value-of select="$bufferAddr"/>,bufferRAM:<xsl:value-of select="$bufferRAM"/>,bufferFormat:'<xsl:value-of select="$bufferFormat"/>',bufferCols:<xsl:value-of select="$bufferCols"/>,bufferRows:<xsl:value-of select="$bufferRows"/>,bufferBits:<xsl:value-of select="$bufferBits"/>,bufferLeft:<xsl:value-of select="$bufferLeft"/>,bufferRotate:<xsl:value-of select="$bufferRotate"/>,memory:<xsl:value-of select="$memory"/>,switches:'<xsl:value-of select="$switches"/>',scale:<xsl:value-of select="$scale"/>,charCols:<xsl:value-of select="$charCols"/>,charRows:<xsl:value-of select="$charRows"/>,fontROM:'<xsl:value-of select="$fontROM"/>',touchScreen:'<xsl:value-of select="$touchScreen"/>',autoLock:<xsl:value-of select="$autoLock"/>,aspectRatio:<xsl:value-of select="$aspectRatio"/>,smoothing:<xsl:value-of select="$smoothing"/>,interruptRate:<xsl:value-of select="$interruptRate"/>,refreshRate:<xsl:value-of select="$refreshRate"/></xsl:with-param>
+			<xsl:with-param name="parms">,model:'<xsl:value-of select="$model"/>',mode:<xsl:value-of select="$mode"/>,screenWidth:<xsl:value-of select="$screenWidth"/>,screenHeight:<xsl:value-of select="$screenHeight"/>,screenColor:'<xsl:value-of select="$screenColor"/>',screenRotate:<xsl:value-of select="$screenRotate"/>,bufferAddr:<xsl:value-of select="$bufferAddr"/>,bufferRAM:<xsl:value-of select="$bufferRAM"/>,bufferFormat:'<xsl:value-of select="$bufferFormat"/>',bufferCols:<xsl:value-of select="$bufferCols"/>,bufferRows:<xsl:value-of select="$bufferRows"/>,bufferBits:<xsl:value-of select="$bufferBits"/>,bufferLeft:<xsl:value-of select="$bufferLeft"/>,bufferRotate:<xsl:value-of select="$bufferRotate"/>,memory:<xsl:value-of select="$memory"/>,switches:'<xsl:value-of select="$switches"/>',scale:<xsl:value-of select="$scale"/>,cellWidth:<xsl:value-of select="$cellWidth"/>,cellHeight:<xsl:value-of select="$cellHeight"/>,charCols:<xsl:value-of select="$charCols"/>,charRows:<xsl:value-of select="$charRows"/>,fontROM:'<xsl:value-of select="$fontROM"/>',fontColor:'<xsl:value-of select="$fontColor"/>',touchScreen:'<xsl:value-of select="$touchScreen"/>',autoLock:<xsl:value-of select="$autoLock"/>,aspectRatio:<xsl:value-of select="$aspectRatio"/>,smoothing:<xsl:value-of select="$smoothing"/>,interruptRate:<xsl:value-of select="$interruptRate"/>,refreshRate:<xsl:value-of select="$refreshRate"/></xsl:with-param>
 		</xsl:call-template>
 	</xsl:template>
 
diff --git a/versions/pc8080/1.23.3/components.xsl b/versions/pc8080/1.23.3/components.xsl
index 11e8db87d..a3255b17a 100644
--- a/versions/pc8080/1.23.3/components.xsl
+++ b/versions/pc8080/1.23.3/components.xsl
@@ -1061,6 +1061,18 @@
 				<xsl:otherwise>false</xsl:otherwise>
 			</xsl:choose>
 		</xsl:variable>
+		<xsl:variable name="cellWidth">
+			<xsl:choose>
+				<xsl:when test="@cellWidth"><xsl:value-of select="@cellWidth"/></xsl:when>
+				<xsl:otherwise>1</xsl:otherwise>
+			</xsl:choose>
+		</xsl:variable>
+		<xsl:variable name="cellHeight">
+			<xsl:choose>
+				<xsl:when test="@cellHeight"><xsl:value-of select="@cellHeight"/></xsl:when>
+				<xsl:otherwise>1</xsl:otherwise>
+			</xsl:choose>
+		</xsl:variable>
 		<xsl:variable name="charCols">
 			<xsl:choose>
 				<xsl:when test="@cols"><xsl:value-of select="@cols"/></xsl:when>
@@ -1083,6 +1095,12 @@
 				<xsl:otherwise/>
 			</xsl:choose>
 		</xsl:variable>
+		<xsl:variable name="fontColor">
+			<xsl:choose>
+				<xsl:when test="@fontColor"><xsl:value-of select="@fontColor"/></xsl:when>
+				<xsl:otherwise/>
+			</xsl:choose>
+		</xsl:variable>
 		<xsl:variable name="touchScreen">
 			<xsl:choose>
 				<xsl:when test="@touchscreen"><xsl:value-of select="@touchscreen"/></xsl:when>
@@ -1125,7 +1143,7 @@
 		<xsl:call-template name="component">
 			<xsl:with-param name="machine" select="$machine"/>
 			<xsl:with-param name="class">video</xsl:with-param>
-			<xsl:with-param name="parms">,model:'<xsl:value-of select="$model"/>',mode:<xsl:value-of select="$mode"/>,screenWidth:<xsl:value-of select="$screenWidth"/>,screenHeight:<xsl:value-of select="$screenHeight"/>,screenColor:'<xsl:value-of select="$screenColor"/>',screenRotate:<xsl:value-of select="$screenRotate"/>,bufferAddr:<xsl:value-of select="$bufferAddr"/>,bufferRAM:<xsl:value-of select="$bufferRAM"/>,bufferFormat:'<xsl:value-of select="$bufferFormat"/>',bufferCols:<xsl:value-of select="$bufferCols"/>,bufferRows:<xsl:value-of select="$bufferRows"/>,bufferBits:<xsl:value-of select="$bufferBits"/>,bufferLeft:<xsl:value-of select="$bufferLeft"/>,bufferRotate:<xsl:value-of select="$bufferRotate"/>,memory:<xsl:value-of select="$memory"/>,switches:'<xsl:value-of select="$switches"/>',scale:<xsl:value-of select="$scale"/>,charCols:<xsl:value-of select="$charCols"/>,charRows:<xsl:value-of select="$charRows"/>,fontROM:'<xsl:value-of select="$fontROM"/>',touchScreen:'<xsl:value-of select="$touchScreen"/>',autoLock:<xsl:value-of select="$autoLock"/>,aspectRatio:<xsl:value-of select="$aspectRatio"/>,smoothing:<xsl:value-of select="$smoothing"/>,interruptRate:<xsl:value-of select="$interruptRate"/>,refreshRate:<xsl:value-of select="$refreshRate"/></xsl:with-param>
+			<xsl:with-param name="parms">,model:'<xsl:value-of select="$model"/>',mode:<xsl:value-of select="$mode"/>,screenWidth:<xsl:value-of select="$screenWidth"/>,screenHeight:<xsl:value-of select="$screenHeight"/>,screenColor:'<xsl:value-of select="$screenColor"/>',screenRotate:<xsl:value-of select="$screenRotate"/>,bufferAddr:<xsl:value-of select="$bufferAddr"/>,bufferRAM:<xsl:value-of select="$bufferRAM"/>,bufferFormat:'<xsl:value-of select="$bufferFormat"/>',bufferCols:<xsl:value-of select="$bufferCols"/>,bufferRows:<xsl:value-of select="$bufferRows"/>,bufferBits:<xsl:value-of select="$bufferBits"/>,bufferLeft:<xsl:value-of select="$bufferLeft"/>,bufferRotate:<xsl:value-of select="$bufferRotate"/>,memory:<xsl:value-of select="$memory"/>,switches:'<xsl:value-of select="$switches"/>',scale:<xsl:value-of select="$scale"/>,cellWidth:<xsl:value-of select="$cellWidth"/>,cellHeight:<xsl:value-of select="$cellHeight"/>,charCols:<xsl:value-of select="$charCols"/>,charRows:<xsl:value-of select="$charRows"/>,fontROM:'<xsl:value-of select="$fontROM"/>',fontColor:'<xsl:value-of select="$fontColor"/>',touchScreen:'<xsl:value-of select="$touchScreen"/>',autoLock:<xsl:value-of select="$autoLock"/>,aspectRatio:<xsl:value-of select="$aspectRatio"/>,smoothing:<xsl:value-of select="$smoothing"/>,interruptRate:<xsl:value-of select="$interruptRate"/>,refreshRate:<xsl:value-of select="$refreshRate"/></xsl:with-param>
 		</xsl:call-template>
 	</xsl:template>
 
diff --git a/versions/pc8080/1.23.3/pc8080-dbg.js b/versions/pc8080/1.23.3/pc8080-dbg.js
index 68de4e557..796634925 100644
--- a/versions/pc8080/1.23.3/pc8080-dbg.js
+++ b/versions/pc8080/1.23.3/pc8080-dbg.js
@@ -1,217 +1,221 @@
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+Cd.prototype.Ga=function(){if(this.Ia){if(this.G){var a=this.G,b=this.id,c=this.H,d=this.C,e=this.Ia,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=ia(n,l,a.Ua);0>p&&n.splice(-(p+1),0,l)}k&&(g.a=k.replace(/''/g,'"'))}a.I.push({wc:b,D:c,lc:d,Ia:e,Ob:f})}delete this.Ia}return!0};Cd.prototype.Fa=function(){return!0};
+function Dd(a,b,c,d){if(d)a.ga("Unable to load system ROM (error "+d+": "+b+")");else{Ya(a.Fb,b,c);if("["==c.charAt(0)||"{"==c.charAt(0))try{var e=eval("("+c+")"),f=e.bytes,h=e.data;if(f)a.u=f;else if(h)for(a.u=Array(4*h.length),d=c=0;c<h.length;c++)a.u[d++]=h[c]&255,a.u[d++]=h[c]>>8&255,a.u[d++]=h[c]>>16&255,a.u[d++]=h[c]>>24&255;else a.u=e;a.Ia=e.symbols;if(!a.u.length){w("Empty ROM: "+b);return}if(1==a.u.length){w(a.u[0]);return}}catch(g){a.ga("ROM data error: "+g.message);return}else for(b=c.replace(/\n/gm,
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-function Fd(a){if(!jb(a))if(!a.F)C(a);else if(a.u&&a.C){a.B||(a.B=a.u.length);if(a.u.length!=a.B)kb(a,"ROM size (0x"+q(a.u.length)+") does not match specified size ("+("0x"+q(a.B))+")");else if(Gd(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.C,h=d.B,g=[],k=d.H>>>f.fa;0<h&&k<f.U.length;)g.push(f.U[k++]),h-=f.wa;f=d.C;d=d.B;h=0;for(e>>>=f.fa;0<d&&e<f.U.length;){k=g[h++];if(!k)break;f.U[e++]=k;d-=f.wa}}delete a.u}C(a)}}
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+function Fd(a){if(!jb(a))if(!a.F)E(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(Gd(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.fa;0<h&&l<f.U.length;)g.push(f.U[l++]),h-=f.ya;f=d.B;d=d.C;h=0;for(e>>>=f.fa;0<d&&e<f.U.length;){l=g[h++];if(!l)break;f.U[e++]=l;d-=f.ya}}delete a.u}E(a)}}
+function Gd(a,b){if(sb(a.B,b,a.C,a.I?1:Rb)){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<Ed.length;c++)xb(a.B,Ed[c],118);Dc(a.b,function(a){return function(b){if(0<=Ed.indexOf(b)){var c=!1,h=a.b,g=a.G;if(5==b)switch(c=!0,h.O){case 2:Hd(a,String.fromCharCode(h.R));break;case 9:for(var l=Kc(h),k="",n=255;n--;){var p=a.b.W(l++);if(36==p)break;k+=String.fromCharCode(p)}Hd(a,k);break;default:c=!1}c?vd.call(h):g&&(a.g("\nCP/M vector "+t(b)),I(h,b),g.da());b=!0}else b=!1;return b}}(a));
+Fc(a.b,b)}return!0}return!1}function Hd(a,b){b=b.replace(/\r/g,"");a.wa&&(a.wa.value+=b,a.wa.scrollTop=a.wa.scrollHeight)}Ka(function(){for(var a=D(document,"pc8080","rom"),b=0;b<a.length;b++){var c=a[b],d=B(c),d=new Cd(d);ab(d,c)}});function Id(a){y.call(this,"RAM",a,Id);this.w=a.addr;this.C=a.size;this.u=!1}A(Id);m=Id.prototype;m.Ja=function(a,b,c,d){this.B=b;this.b=c;this.G=d;E(this)};m.Ga=function(a,b){b||this.reset();return!0};m.Fa=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};Ka(function(){for(var a=D(document,"pc8080","ram"),b=0;b<a.length;b++){var c=a[b],d=B(c),d=new Id(d);ab(d,c)}});function Jd(a){y.call(this,"Keyboard",a,Jd,65536);this.reset();E(this)}A(Jd);var Kd={"1p":49,"2p":50,coin:51,left:37,right:39,fire:32},Ld={65:37,68:39,76:32};Jd.prototype.reset=function(){this.b={}};
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-Ja(function(){for(var a=z(document,"pc8080","keyboard"),b=0;b<a.length;b++){var c=a[b],d=x(c),d=new Jd(d);ab(d,c)}});
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-Od.prototype.Ra=function(){var a=!1;if(this.w){if(this.w.Ra){a="100%";if(screen&&screen.width&&screen.height){var b=screen.width/screen.height,c=this.sa/this.ea;b>c&&(a=Math.round(c/b*100)+"%")}this.Qa?(this.J.style.width=a,this.J.style.width=a,this.J.style.display="block",this.J.style.margin="auto"):(this.w.style.width=a,this.w.style.height="auto");this.w.style.backgroundColor="black";this.w.Ra();a=!0}this.ha&&this.ha.focus()}return a};
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+Jd.prototype.Ja=function(a,b,c,d){this.G=d;this.C=ob(a,"ChipSet")};function Md(a,b,c){var d=!0,e;a:{e=b.keyCode;e=Ld[e]||e;for(var f in Kd)if(Kd[f]===e){e=f;break a}e=null}e&&(d=Nd(a,e,c));d||b.preventDefault();return d}function Nd(a,b,c){a.b[b]=c;if(a.C)switch(b){case "1p":Bd(a.C,4,c);break;case "2p":Bd(a.C,2,c);break;case "coin":Bd(a.C,1,c);break;case "left":Bd(a.C,32,c);break;case "right":Bd(a.C,64,c);break;case "fire":Bd(a.C,16,c)}return!1}
+Ka(function(){for(var a=D(document,"pc8080","keyboard"),b=0;b<a.length;b++){var c=a[b],d=B(c),d=new Jd(d);ab(d,c)}});
+function Od(a,b,c,d,e){var f=this;this.yb=za("Gecko/");var h=["","moz","ms","webkit"];y.call(this,"Video",a,Od,262144);this.ha=a.screenWidth;this.X=a.screenHeight;this.ea=a.bufferAddr;this.oc=a.bufferRAM;var g=a.bufferFormat;this.ua=g&&Pd[g.toLowerCase()]||Qd;this.Wb=a.bufferCols;this.Ua=a.bufferRows;this.nc=this.ta=a.cellWidth||1;this.xa=a.cellHeight||1;this.Ba=a.bufferBits||1;this.uc=a.bufferLeft||0;if(this.F=a.bufferRotate)this.F=this.F%360,0<this.F&&(this.F-=360),-90!=this.F&&(this.ga("unsupported buffer rotation: "+
+this.F),this.F=0);this.Vb=a.interruptRate;this.Ka=a.refreshRate||60;this.J=b;this.I=c;this.oa=(this.vc=d)||b||null;this.kb=this.ha/this.Wb|0;this.lb=this.X/this.Ua|0;b=a.smoothing;(c=Sa.smoothing)&&(b="true"==c);if(null!=b)for(c=0;c<h.length;c++)if(d=(d=h[c])?d+"ImageSmoothingEnabled":"imageSmoothingEnabled",void 0!==this.I[d]){this.I[d]=b;break}if(this.H=a.screenRotate)this.H=this.H%360,0<this.H&&(this.H-=360),-90!=this.H?(this.ga("unsupported screen rotation: "+this.H),this.H=0):(this.I.translate(0,
+this.X),this.I.rotate(this.H*Math.PI/180),this.I.scale(this.X/this.ha,this.ha/this.X));Rd(this);if(this.w=e)if(this.w.Va=e.requestFullscreen||e.msRequestFullscreen||e.mozRequestFullScreen||e.webkitRequestFullscreen,this.w.Va){for(c=0;c<h.length;c++)if(d=h[c]+"fullscreenchange","on"+d in document){document.addEventListener(d,function(){Sd(f,document.fullscreenElement||document.msFullscreenElement||document.mozFullScreenElement||document.webkitFullscreenElement?!0:!1)},!1);break}for(c=0;c<h.length;c++)if(d=
+h[c]+"fullscreenerror","on"+d in document){document.addEventListener(d,function(){Sd(f,null)},!1);break}}if(this.Z=a.fontROM)"json"!=ca(this.Z)&&(this.Z=na()+"/api/v1/dump?file="+this.Z+"&format=bytes"),ma(this.Z,null,!0,function(a,b,c){Td(f,a,b,c)})}A(Od);var Qd=0,Pd={vt100:2};
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+m.rb=function(a){void 0===a&&(a=this.u||(this.X?1:Af));if(!this.w){this.w++;var b=!1,c=!1;this.ha=!1;var d=this.Z||new Hc(this,"1.23.3");if(-1==a)b=!0;else if(a>Af){if(wf(d,this.X)){this.H=new Hc(this,"1.23.3","failsafe");wf(this.H)&&(Ff(this,d),a=2,tf(this.H));J(this.H,"timestamp",ka());uf(this.H);var e=this.u&&!this.J;if(1==a||pa("Click OK to restore the previous PC8080 machine state, or CANCEL to reset the machine.")){if(c=vf(d)){var f=xf(d,"code"),h=xf(d,"data");f&&("ok"==f?wf(d,h):("error"==
+f&&"no machine state"!=h?(this.ga("Error: "+h),"unable to verify user"==h&&(ya("user",""),this.C=null)):this.g(f+": "+h),tf(d),wf(d)?(c=vf(d),e=!0):c=!1))}e&&Ef(this,c?d:null)}else 2==a&&d.clear()}else Ef(this);delete this.X;delete this.Z}e=Za(this.id);for(f=0;f<e.length;f++)h=e[f],h!==this&&h!=this.b&&(c=Gf(this,h,d,b,c));b=[d,a,c];-1!=a?Df(this,this.Qb,b):this.Qb(b)}};
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+function Rc(a,b,c,d){if(!c&&b){d.push(b);a=Ga[d[0]];b=null;for(var e in a)if(fa(e,"components.xsl")){b=e.replace(".xsl",".css");break}b?p(b,null,!0,function(a,b){Sc(b,d)}):Sc(null,d)}else u("Error ("+c+") requesting "+a)}
+function Sc(a,b){var c,d,e,f=b[0],h=b[1];c=b[4];c=c.match(/^(\s*\(function\(\)\{)([\s\S]*)(}\)\(\);\s*)$/);var g=Ga[f],l={},k;for(k in g){var q=g[k],r=ea(k);if("xml"==r){for(r=/[ \t]*<disk [^>]*path=(['"])(.*?)\1.*?<\/disk>\n?/g;d=r.exec(g[k]);){var t=d[2];t&&(g[t]||(q=q.replace(d[0],"")))}d=k=da(k)}else"xsl"==r&&(e=k=da(k));l[k]=q}a&&(l[k="css"]=a);b[2]&&(l[k="parms"]=b[2]);b[3]&&(l[k="state"]=b[3]);d&&e?(k=JSON.stringify(l),h+=".js",c=c[1]+"var resources="+k+";"+c[2]+c[3],c=c.replace(/\u00A9/g,
 "&#xA9;"),k=h,g=null,l="data:application/javascript,",l=ra("Firefox")?l+encodeURIComponent(c):l+encodeURI(c),k&&(g=document.createElement("a"),"string"!=typeof g.download&&(g=null)),g?(g.href=l,g.download=k,document.body.appendChild(g),g.click(),document.body.removeChild(g),c="Check your Downloads folder for "+k+"."):(window.open(l),c="Check your browser for a new window/tab containing the requested data"+(k?" ("+k+")":"")+"."),c+=', copy it to your web server as "'+h+'", and then add the following to your web page:\n\n',
-c+='<div id="'+f+'"></div>\n',c+="...\n",c+='<script type="text/javascript" src="'+h+'">\x3c/script>\n',c+='<script type="text/javascript">embedPC("'+f+'","'+d+'","'+e+'");\x3c/script>\n\n',c+="The machine should appear where the <div> is located.",r(c)):r("Missing XML/XSL resources")}
-window.savePC=function(a,b,c){var d=Ia("Computer",a),e=Ia("Debugger",a);if(d){var f=Gc(d,!0),h=d.m?JSON.stringify(d.m):null;b||(b="/versions/pcjs/1.23.3/pc"+(e?"-dbg":"")+".js");if(c&&c({state:f,eb:h}))return!0;p(b,null,!0,function(c,d,e){Pc(c,d,e,[a,da(b,!0),h,f])});return!0}r("Unable to identify machine '"+a+"'");return!1};})();
+c+='<div id="'+f+'"></div>\n',c+="...\n",c+='<script type="text/javascript" src="'+h+'">\x3c/script>\n',c+='<script type="text/javascript">embedPC("'+f+'","'+d+'","'+e+'");\x3c/script>\n\n',c+="The machine should appear where the <div> is located.",u(c)):u("Missing XML/XSL resources")}
+window.savePC=function(a,b,c){var d=Ia("Computer",a),e=Ia("Debugger",a);if(d){var f=Jc(d,!0),h=d.o?JSON.stringify(d.o):null;b||(b="/versions/pcjs/1.23.3/pc"+(e?"-dbg":"")+".js");if(c&&c({state:f,ob:h}))return!0;p(b,null,!0,function(c,d,e){Rc(c,d,e,[a,da(b,!0),h,f])});return!0}u("Unable to identify machine '"+a+"'");return!1};})();
diff --git a/versions/pcx86/1.23.3/components.xsl b/versions/pcx86/1.23.3/components.xsl
index 9fef347a5..3b5deecd3 100644
--- a/versions/pcx86/1.23.3/components.xsl
+++ b/versions/pcx86/1.23.3/components.xsl
@@ -1061,6 +1061,18 @@
 				<xsl:otherwise>false</xsl:otherwise>
 			</xsl:choose>
 		</xsl:variable>
+		<xsl:variable name="cellWidth">
+			<xsl:choose>
+				<xsl:when test="@cellWidth"><xsl:value-of select="@cellWidth"/></xsl:when>
+				<xsl:otherwise>1</xsl:otherwise>
+			</xsl:choose>
+		</xsl:variable>
+		<xsl:variable name="cellHeight">
+			<xsl:choose>
+				<xsl:when test="@cellHeight"><xsl:value-of select="@cellHeight"/></xsl:when>
+				<xsl:otherwise>1</xsl:otherwise>
+			</xsl:choose>
+		</xsl:variable>
 		<xsl:variable name="charCols">
 			<xsl:choose>
 				<xsl:when test="@cols"><xsl:value-of select="@cols"/></xsl:when>
@@ -1083,6 +1095,12 @@
 				<xsl:otherwise/>
 			</xsl:choose>
 		</xsl:variable>
+		<xsl:variable name="fontColor">
+			<xsl:choose>
+				<xsl:when test="@fontColor"><xsl:value-of select="@fontColor"/></xsl:when>
+				<xsl:otherwise/>
+			</xsl:choose>
+		</xsl:variable>
 		<xsl:variable name="touchScreen">
 			<xsl:choose>
 				<xsl:when test="@touchscreen"><xsl:value-of select="@touchscreen"/></xsl:when>
@@ -1125,7 +1143,7 @@
 		<xsl:call-template name="component">
 			<xsl:with-param name="machine" select="$machine"/>
 			<xsl:with-param name="class">video</xsl:with-param>
-			<xsl:with-param name="parms">,model:'<xsl:value-of select="$model"/>',mode:<xsl:value-of select="$mode"/>,screenWidth:<xsl:value-of select="$screenWidth"/>,screenHeight:<xsl:value-of select="$screenHeight"/>,screenColor:'<xsl:value-of select="$screenColor"/>',screenRotate:<xsl:value-of select="$screenRotate"/>,bufferAddr:<xsl:value-of select="$bufferAddr"/>,bufferRAM:<xsl:value-of select="$bufferRAM"/>,bufferFormat:'<xsl:value-of select="$bufferFormat"/>',bufferCols:<xsl:value-of select="$bufferCols"/>,bufferRows:<xsl:value-of select="$bufferRows"/>,bufferBits:<xsl:value-of select="$bufferBits"/>,bufferLeft:<xsl:value-of select="$bufferLeft"/>,bufferRotate:<xsl:value-of select="$bufferRotate"/>,memory:<xsl:value-of select="$memory"/>,switches:'<xsl:value-of select="$switches"/>',scale:<xsl:value-of select="$scale"/>,charCols:<xsl:value-of select="$charCols"/>,charRows:<xsl:value-of select="$charRows"/>,fontROM:'<xsl:value-of select="$fontROM"/>',touchScreen:'<xsl:value-of select="$touchScreen"/>',autoLock:<xsl:value-of select="$autoLock"/>,aspectRatio:<xsl:value-of select="$aspectRatio"/>,smoothing:<xsl:value-of select="$smoothing"/>,interruptRate:<xsl:value-of select="$interruptRate"/>,refreshRate:<xsl:value-of select="$refreshRate"/></xsl:with-param>
+			<xsl:with-param name="parms">,model:'<xsl:value-of select="$model"/>',mode:<xsl:value-of select="$mode"/>,screenWidth:<xsl:value-of select="$screenWidth"/>,screenHeight:<xsl:value-of select="$screenHeight"/>,screenColor:'<xsl:value-of select="$screenColor"/>',screenRotate:<xsl:value-of select="$screenRotate"/>,bufferAddr:<xsl:value-of select="$bufferAddr"/>,bufferRAM:<xsl:value-of select="$bufferRAM"/>,bufferFormat:'<xsl:value-of select="$bufferFormat"/>',bufferCols:<xsl:value-of select="$bufferCols"/>,bufferRows:<xsl:value-of select="$bufferRows"/>,bufferBits:<xsl:value-of select="$bufferBits"/>,bufferLeft:<xsl:value-of select="$bufferLeft"/>,bufferRotate:<xsl:value-of select="$bufferRotate"/>,memory:<xsl:value-of select="$memory"/>,switches:'<xsl:value-of select="$switches"/>',scale:<xsl:value-of select="$scale"/>,cellWidth:<xsl:value-of select="$cellWidth"/>,cellHeight:<xsl:value-of select="$cellHeight"/>,charCols:<xsl:value-of select="$charCols"/>,charRows:<xsl:value-of select="$charRows"/>,fontROM:'<xsl:value-of select="$fontROM"/>',fontColor:'<xsl:value-of select="$fontColor"/>',touchScreen:'<xsl:value-of select="$touchScreen"/>',autoLock:<xsl:value-of select="$autoLock"/>,aspectRatio:<xsl:value-of select="$aspectRatio"/>,smoothing:<xsl:value-of select="$smoothing"/>,interruptRate:<xsl:value-of select="$interruptRate"/>,refreshRate:<xsl:value-of select="$refreshRate"/></xsl:with-param>
 		</xsl:call-template>
 	</xsl:template>