fixup link to visual6502 wiki

Added zoom using the mouse wheel

3rdparty/jquery.cookie.js

@@ -0,0 +1,92 @@
+/**
+ * Cookie plugin
+ *
+ * Copyright (c) 2006 Klaus Hartl (stilbuero.de)
+ * Dual licensed under the MIT and GPL licenses:
+ * http://www.opensource.org/licenses/mit-license.php
+ * http://www.gnu.org/licenses/gpl.html
+ *
+ */
+
+/**
+ * Create a cookie with the given name and value and other optional parameters.
+ *
+ * @example $.cookie('the_cookie', 'the_value');
+ * @desc Set the value of a cookie.
+ * @example $.cookie('the_cookie', 'the_value', {expires: 7, path: '/', domain: 'jquery.com', secure: true});
+ * @desc Create a cookie with all available options.
+ * @example $.cookie('the_cookie', 'the_value');
+ * @desc Create a session cookie.
+ * @example $.cookie('the_cookie', null);
+ * @desc Delete a cookie by passing null as value.
+ *
+ * @param String name The name of the cookie.
+ * @param String value The value of the cookie.
+ * @param Object options An object literal containing key/value pairs to provide optional cookie attributes.
+ * @option Number|Date expires Either an integer specifying the expiration date from now on in days or a Date object.
+ *                             If a negative value is specified (e.g. a date in the past), the cookie will be deleted.
+ *                             If set to null or omitted, the cookie will be a session cookie and will not be retained
+ *                             when the the browser exits.
+ * @option String path The value of the path atribute of the cookie (default: path of page that created the cookie).
+ * @option String domain The value of the domain attribute of the cookie (default: domain of page that created the cookie).
+ * @option Boolean secure If true, the secure attribute of the cookie will be set and the cookie transmission will
+ *                        require a secure protocol (like HTTPS).
+ * @type undefined
+ *
+ * @name $.cookie
+ * @cat Plugins/Cookie
+ * @author Klaus Hartl/klaus.hartl@stilbuero.de
+ */
+
+/**
+ * Get the value of a cookie with the given name.
+ *
+ * @example $.cookie('the_cookie');
+ * @desc Get the value of a cookie.
+ *
+ * @param String name The name of the cookie.
+ * @return The value of the cookie.
+ * @type String
+ *
+ * @name $.cookie
+ * @cat Plugins/Cookie
+ * @author Klaus Hartl/klaus.hartl@stilbuero.de
+ */
+jQuery.cookie = function(name, value, options) {
+    if (typeof value != 'undefined') { // name and value given, set cookie
+        options = options || {};
+        if (value === null) {
+            value = '';
+            options.expires = -1;
+        }
+        var expires = '';
+        if (options.expires && (typeof options.expires == 'number' || options.expires.toUTCString)) {
+            var date;
+            if (typeof options.expires == 'number') {
+                date = new Date();
+                date.setTime(date.getTime() + (options.expires * 24 * 60 * 60 * 1000));
+            } else {
+                date = options.expires;
+            }
+            expires = '; expires=' + date.toUTCString(); // use expires attribute, max-age is not supported by IE
+        }
+        var path = options.path ? '; path=' + options.path : '';
+        var domain = options.domain ? '; domain=' + options.domain : '';
+        var secure = options.secure ? '; secure' : '';
+        document.cookie = [name, '=', encodeURIComponent(value), expires, path, domain, secure].join('');
+    } else { // only name given, get cookie
+        var cookieValue = null;
+        if (document.cookie && document.cookie != '') {
+            var cookies = document.cookie.split(';');
+            for (var i = 0; i < cookies.length; i++) {
+                var cookie = jQuery.trim(cookies[i]);
+                // Does this cookie string begin with the name we want?
+                if (cookie.substring(0, name.length + 1) == (name + '=')) {
+                    cookieValue = decodeURIComponent(cookie.substring(name.length + 1));
+                    break;
+                }
+            }
+        }
+        return cookieValue;
+    }
+};

3rdparty/splitter.js

@@ -0,0 +1,213 @@
+/*
+ * jQuery.splitter.js - two-pane splitter window plugin
+ *
+ * version 1.51 (2009/01/09) 
+ * 
+ * Dual licensed under the MIT and GPL licenses: 
+ *   http://www.opensource.org/licenses/mit-license.php 
+ *   http://www.gnu.org/licenses/gpl.html 
+ */
+
+/**
+ * The splitter() plugin implements a two-pane resizable splitter window.
+ * The selected elements in the jQuery object are converted to a splitter;
+ * each selected element should have two child elements, used for the panes
+ * of the splitter. The plugin adds a third child element for the splitbar.
+ * 
+ * For more details see: http://methvin.com/splitter/
+ *
+ *
+ * @example $('#MySplitter').splitter();
+ * @desc Create a vertical splitter with default settings 
+ *
+ * @example $('#MySplitter').splitter({type: 'h', accessKey: 'M'});
+ * @desc Create a horizontal splitter resizable via Alt+Shift+M
+ *
+ * @name splitter
+ * @type jQuery
+ * @param Object options Options for the splitter (not required)
+ * @cat Plugins/Splitter
+ * @return jQuery
+ * @author Dave Methvin (dave.methvin@gmail.com)
+ */
+ ;(function($){
+ 
+ $.fn.splitter = function(args){
+	args = args || {};
+	return this.each(function() {
+		var zombie;		// left-behind splitbar for outline resizes
+		function startSplitMouse(evt) {
+			if ( opts.outline )
+				zombie = zombie || bar.clone(false).insertAfter(A);
+			panes.css("-webkit-user-select", "none");	// Safari selects A/B text on a move
+			bar.addClass(opts.activeClass);
+			A._posSplit = A[0][opts.pxSplit] - evt[opts.eventPos];
+			$(document)
+				.bind("mousemove", doSplitMouse)
+				.bind("mouseup", endSplitMouse);
+		}
+		function doSplitMouse(evt) {
+			var newPos = A._posSplit+evt[opts.eventPos];
+			if ( opts.outline ) {
+				newPos = Math.max(0, Math.min(newPos, splitter._DA - bar._DA));
+				bar.css(opts.origin, newPos);
+			} else 
+				resplit(newPos);
+		}
+		function endSplitMouse(evt) {
+			bar.removeClass(opts.activeClass);
+			var newPos = A._posSplit+evt[opts.eventPos];
+			if ( opts.outline ) {
+				zombie.remove(); zombie = null;
+				resplit(newPos);
+			}
+			panes.css("-webkit-user-select", "text");	// let Safari select text again
+			$(document)
+				.unbind("mousemove", doSplitMouse)
+				.unbind("mouseup", endSplitMouse);
+		}
+		function resplit(newPos) {
+			// Constrain new splitbar position to fit pane size limits
+			newPos = Math.max(A._min, splitter._DA - B._max, 
+					Math.min(newPos, A._max, splitter._DA - bar._DA - B._min));
+			// Resize/position the two panes
+			bar._DA = bar[0][opts.pxSplit];		// bar size may change during dock
+			bar.css(opts.origin, newPos).css(opts.fixed, splitter._DF);
+			A.css(opts.origin, 0).css(opts.split, newPos).css(opts.fixed,  splitter._DF);
+			B.css(opts.origin, newPos+bar._DA)
+				.css(opts.split, splitter._DA-bar._DA-newPos).css(opts.fixed,  splitter._DF);
+			// IE fires resize for us; all others pay cash
+			if ( !$.browser.msie )
+				panes.trigger("resize");
+		}
+		function dimSum(jq, dims) {
+			// Opera returns -1 for missing min/max width, turn into 0
+			var sum = 0;
+			for ( var i=1; i < arguments.length; i++ )
+				sum += Math.max(parseInt(jq.css(arguments[i])) || 0, 0);
+			return sum;
+		}
+		
+		// Determine settings based on incoming opts, element classes, and defaults
+		var vh = (args.splitHorizontal? 'h' : args.splitVertical? 'v' : args.type) || 'v';
+		var opts = $.extend({
+			activeClass: 'active',	// class name for active splitter
+			pxPerKey: 8,			// splitter px moved per keypress
+			tabIndex: 0,			// tab order indicator
+			accessKey: ''			// accessKey for splitbar
+		},{
+			v: {					// Vertical splitters:
+				keyLeft: 39, keyRight: 37, cursor: "e-resize",
+				splitbarClass: "vsplitbar", outlineClass: "voutline",
+				type: 'v', eventPos: "pageX", origin: "left",
+				split: "width",  pxSplit: "offsetWidth",  side1: "Left", side2: "Right",
+				fixed: "height", pxFixed: "offsetHeight", side3: "Top",  side4: "Bottom"
+			},
+			h: {					// Horizontal splitters:
+				keyTop: 40, keyBottom: 38,  cursor: "n-resize",
+				splitbarClass: "hsplitbar", outlineClass: "houtline",
+				type: 'h', eventPos: "pageY", origin: "top",
+				split: "height", pxSplit: "offsetHeight", side1: "Top",  side2: "Bottom",
+				fixed: "width",  pxFixed: "offsetWidth",  side3: "Left", side4: "Right"
+			}
+		}[vh], args);
+
+		// Create jQuery object closures for splitter and both panes
+		var splitter = $(this).css({position: "relative"});
+		var panes = $(">*", splitter[0]).css({
+			position: "absolute", 			// positioned inside splitter container
+			"z-index": "1",					// splitbar is positioned above
+			"-moz-outline-style": "none"	// don't show dotted outline
+		});
+		var A = $(panes[0]);		// left  or top
+		var B = $(panes[1]);		// right or bottom
+
+		// Focuser element, provides keyboard support; title is shown by Opera accessKeys
+		var focuser = $('<a href="javascript:void(0)"></a>')
+			.attr({accessKey: opts.accessKey, tabIndex: opts.tabIndex, title: opts.splitbarClass})
+			.bind($.browser.opera?"click":"focus", function(){ this.focus(); bar.addClass(opts.activeClass) })
+			.bind("keydown", function(e){
+				var key = e.which || e.keyCode;
+				var dir = key==opts["key"+opts.side1]? 1 : key==opts["key"+opts.side2]? -1 : 0;
+				if ( dir )
+					resplit(A[0][opts.pxSplit]+dir*opts.pxPerKey, false);
+			})
+			.bind("blur", function(){ bar.removeClass(opts.activeClass) });
+			
+		// Splitbar element, can be already in the doc or we create one
+		var bar = $(panes[2] || '<div></div>')
+			.insertAfter(A).css("z-index", "100").append(focuser)
+			.attr({"class": opts.splitbarClass, unselectable: "on"})
+			.css({position: "absolute",	"user-select": "none", "-webkit-user-select": "none",
+				"-khtml-user-select": "none", "-moz-user-select": "none"})
+			.bind("mousedown", startSplitMouse);
+		// Use our cursor unless the style specifies a non-default cursor
+		if ( /^(auto|default|)$/.test(bar.css("cursor")) )
+			bar.css("cursor", opts.cursor);
+
+		// Cache several dimensions for speed, rather than re-querying constantly
+		bar._DA = bar[0][opts.pxSplit];
+		splitter._PBF = $.boxModel? dimSum(splitter, "border"+opts.side3+"Width", "border"+opts.side4+"Width") : 0;
+		splitter._PBA = $.boxModel? dimSum(splitter, "border"+opts.side1+"Width", "border"+opts.side2+"Width") : 0;
+		A._pane = opts.side1;
+		B._pane = opts.side2;
+		$.each([A,B], function(){
+			this._min = opts["min"+this._pane] || dimSum(this, "min-"+opts.split);
+			this._max = opts["max"+this._pane] || dimSum(this, "max-"+opts.split) || 9999;
+			this._init = opts["size"+this._pane]===true ?
+				parseInt($.curCSS(this[0],opts.split)) : opts["size"+this._pane];
+		});
+		
+		// Determine initial position, get from cookie if specified
+		var initPos = A._init;
+		if ( !isNaN(B._init) )	// recalc initial B size as an offset from the top or left side
+			initPos = splitter[0][opts.pxSplit] - splitter._PBA - B._init - bar._DA;
+		if ( opts.cookie ) {
+			if ( !$.cookie )
+				alert('jQuery.splitter(): jQuery cookie plugin required');
+			var ckpos = parseInt($.cookie(opts.cookie));
+			if ( !isNaN(ckpos) )
+				initPos = ckpos;
+			$(window).bind("unload", function(){
+				var state = String(bar.css(opts.origin));	// current location of splitbar
+				$.cookie(opts.cookie, state, {expires: opts.cookieExpires || 365, 
+					path: opts.cookiePath || document.location.pathname});
+			});
+		}
+		if ( isNaN(initPos) )	// King Solomon's algorithm
+			initPos = Math.round((splitter[0][opts.pxSplit] - splitter._PBA - bar._DA)/2);
+
+		// Resize event propagation and splitter sizing
+		if ( opts.anchorToWindow ) {
+			// Account for margin or border on the splitter container and enforce min height
+			splitter._hadjust = dimSum(splitter, "borderTopWidth", "borderBottomWidth", "marginBottom");
+			splitter._hmin = Math.max(dimSum(splitter, "minHeight"), 20);
+			$(window).bind("resize", function(){
+				var top = splitter.offset().top;
+				var wh = $(window).height();
+				splitter.css("height", Math.max(wh-top-splitter._hadjust, splitter._hmin)+"px");
+				if ( !$.browser.msie ) splitter.trigger("resize");
+			}).trigger("resize");
+		}
+		else if ( opts.resizeToWidth && !$.browser.msie )
+			$(window).bind("resize", function(){
+				splitter.trigger("resize"); 
+			});
+
+		// Resize event handler; triggered immediately to set initial position
+		splitter.bind("resize", function(e, size){
+			// Custom events bubble in jQuery 1.3; don't Yo Dawg
+			if ( e.target != this ) return;
+			// Determine new width/height of splitter container
+			splitter._DF = splitter[0][opts.pxFixed] - splitter._PBF;
+			splitter._DA = splitter[0][opts.pxSplit] - splitter._PBA;
+			// Bail if splitter isn't visible or content isn't there yet
+			if ( splitter._DF <= 0 || splitter._DA <= 0 ) return;
+			// Re-divvy the adjustable dimension; maintain size of the preferred pane
+			resplit(!isNaN(size)? size : (!(opts.sizeRight||opts.sizeBottom)? A[0][opts.pxSplit] :
+				splitter._DA-B[0][opts.pxSplit]-bar._DA));
+		}).trigger("resize" , [initPos]);
+	});
+};
+
+})(jQuery);

README

@@ -1,9 +1,11 @@
-This is the javascript simulator from the visual5602.org project:
+This is the JavaScript simulator from the visual6502.org project:
 www.visual6502.org/JSSim
 
 It includes a general purpose transistor-level simulator, layout browser,
 and the data from a 6502 revD chip. 
 
+It also includes a similar simulator for the 6800 chip.
+
 Note the various licenses and Copyright associated with each file.
 
 Enjoy!

browsertrouble.html

@@ -2,7 +2,7 @@
 
 <head>
 <title>Visual 6502 in JavaScript</title>
-<style type="text/css">@import "wires.css";</style>
+<style type="text/css">@import "kiosk.css";</style>
 </head>
 
 <body>
@@ -29,5 +29,18 @@ In the meantime, here's a picture of what you're missing:
 <p>
 <a href="http://visual6502.org"><img src="images/jssim2.png" style="border:10px"></a>
 </span>
+
+<script type="text/javascript"><!--
+google_ad_client = "pub-9008420149077488";
+/* 728x90, created 9/22/10 */
+google_ad_slot = "4303982675";
+google_ad_width = 728;
+google_ad_height = 90;
+//-->
+</script>
+<script type="text/javascript"
+src="http://pagead2.googlesyndication.com/pagead/show_ads.js">
+</script>
+
 </body>
 </html>

chip-6800/support.js

@@ -0,0 +1,488 @@
+// chip-specific support functions
+//
+// may override function definitions made previously
+
+chipname='6800';
+
+grChipSize=6600;
+grChipOffsetX=25
+grChipOffsetY=-200;
+
+ngnd = nodenames['gnd'];
+npwr = nodenames['vcc'];
+
+nodenamereset = 'reset';
+
+presetLogLists=[
+                ['cycle',],
+                ['ab','db','rw','vma','Fetch','pc','acca','accb','ix','sp','p'],
+                ['ir','sync','Execute','State'],			// instruction fetch and execution control
+                ['dbi','dbo','tmp','sum','inc'],			// internal register-sized state
+                ['idb','abh','abl','ablx'],				// internal datapath busses
+                ['irq','nmi',nodenamereset,'tsc','dbe','halt','ba'],	// other pins
+        ];
+
+function setupTransistors(){
+	for(i in transdefs){
+		var tdef = transdefs[i];
+		var name = tdef[0];
+		var gate = tdef[1];
+		var c1 = tdef[2];
+		var c2 = tdef[3];
+		var bb = tdef[4];
+		if(tdef[6])
+			// just ignore all the 'weak' transistors for now
+			continue;
+		if(c1==ngnd) {c1=c2;c2=ngnd;}
+		if(c1==npwr) {c1=c2;c2=npwr;}
+		var trans = {name: name, on: false, gate: gate, c1: c1, c2: c2, bb: bb};
+		nodes[gate].gates.push(trans);
+		nodes[c1].c1c2s.push(trans);
+		nodes[c2].c1c2s.push(trans);
+		transistors[name] = trans;
+	}
+}
+
+// simulate a single clock phase with no update to graphics or trace
+function halfStep(){
+	var clk = isNodeHigh(nodenames['phi2']);
+	eval(clockTriggers[cycle]);
+	if (clk) {setLow('phi2'); setLow('dbe'); setHigh('phi1'); handleBusRead(); }
+	else {setHigh('phi1'); setLow('phi1'); setHigh('phi2'); setHigh('dbe'); handleBusWrite();}
+}
+
+function goUntilSyncOrWrite(){
+	halfStep();
+	cycle++;
+	while(
+		!isNodeHigh(nodenames['phi2']) ||
+		( !isNodeHigh(nodenames['sync']) && isNodeHigh(nodenames['rw']) )
+	) {
+		halfStep();
+		cycle++;
+	}
+	chipStatus();
+}
+
+function initChip(){
+        var start = now();
+	for(var nn in nodes) {
+		nodes[nn].state = false;
+		nodes[nn].float = true;
+	}
+
+	nodes[ngnd].state = false;
+	nodes[ngnd].float = false;
+	nodes[npwr].state = true;
+	nodes[npwr].float = false;
+	for(var tn in transistors) transistors[tn].on = false;
+	setLow(nodenamereset);
+	setHigh('phi1'); setLow('phi2'); setLow('dbe');
+	setHigh('dbe'); setLow('tsc'); setHigh('halt');
+	setHigh('irq'); setHigh('nmi');
+	recalcNodeList(allNodes()); 
+	for(var i=0;i<8;i++){
+		setLow('phi1');
+		setHigh('phi2'); setHigh('dbe');
+		setLow('phi2'); setLow('dbe');
+		setHigh('phi1');
+	}
+	setHigh(nodenamereset);
+	for(var i=0;i<6;i++){halfStep();} // avoid updating graphics and trace buffer before user code
+	refresh();
+	cycle = 0;
+	trace = Array();
+	if(typeof expertMode != "undefined")
+		updateLogList();
+	chipStatus();
+	if(ctrace)console.log('initChip done after', now()-start);
+}
+
+function handleBusRead(){
+	if(isNodeHigh(nodenames['rw'])){
+		var a = readAddressBus();
+		var d = eval(readTriggers[a]);
+		if(d == undefined)
+			d = mRead(readAddressBus());
+		if(isNodeHigh(nodenames['sync']))
+			eval(fetchTriggers[d]);
+		writeDataBus(d);
+	}
+}
+
+function readAccA(){return readBits('acca', 8);}
+function readAccB(){return readBits('accb', 8);}
+function readIX(){return (readBits('ixh', 8)<<8) + readBits('ixl', 8);}
+function readSP(){return (readBits('sph', 8)<<8) + readBits('spl', 8);}
+function readPstring(){
+   var result;
+   result = '&#8209' +  // non-breaking hyphen
+            '&#8209' +  // non-breaking hyphen
+            (isNodeHigh(nodenames['flagh'])?'H':'h') +
+            (isNodeHigh(nodenames['flagi'])?'I':'i') +
+            (isNodeHigh(nodenames['flagn'])?'N':'n') +
+            (isNodeHigh(nodenames['flagz'])?'Z':'z') +
+            (isNodeHigh(nodenames['flagv'])?'V':'v') +
+            (isNodeHigh(nodenames['flagc'])?'C':'c');
+   return result;
+}
+
+// The 6800 state control is something like a branching shift register
+// ... but not quite like that
+TCStates=[
+        "Ts",   "Tf",
+        "Tx0",  "Tx1",   "Tx2",
+                                "Ta0", "Ta1", "Ta2",
+        "Td0_0",
+	"#Te0", "Te1_0",
+        "Tg0",  "Tg1",   "Tg2", "Tg3", "Tg4", "Tg5", "Tg6", "Tg7", "Tg8",
+                                "Tr3", "Tr4", "Tr5", "Tr6", "Tr7", "Tr8",
+];
+
+function listActiveTCStates() {
+	var s=[];
+	for(var i=0;i<TCStates.length;i++){
+		var t=TCStates[i];
+		// remove a leading hash, but invert the signal
+		// in any case, remove any trailing suffix
+		if(t[0]=="#"){
+			if(!isNodeHigh(nodenames[t])) s.push(t.slice(1,4));
+		} else {
+			if(isNodeHigh(nodenames[t])) s.push(t.slice(0,3));
+		}
+	}
+	return s.join("+");
+}
+
+function busToString(busname){
+	// takes a signal name or prefix
+	// returns an appropriate string representation
+	// some 'signal names' are CPU-specific aliases to user-friendly string output
+	if(busname=='cycle')
+		return cycle>>1;
+	if(busname=='pc')
+		return busToHex('pch') + busToHex('pcl');
+	if(busname=='sp')
+		return busToHex('sph') + busToHex('spl');
+	if(busname=='ix')
+		return busToHex('ixh') + busToHex('ixl');
+	if(busname=='inc')
+		return busToHex('inch') + busToHex('incl');
+	if(busname=='p')
+		return readPstring();
+	if(busname=='State')
+		return listActiveTCStates();
+	if(busname=='Execute')
+		return disassemblytoHTML(readBits('ir',8));
+	if(busname=='Fetch')
+		return isNodeHigh(nodenames['sync'])?disassemblytoHTML(readDataBus()):"";
+	if(busname=='plaOutputs')
+		// PLA outputs are mostly ^op- but some have a prefix too
+		//    - we'll allow the x and xx prefix but ignore the #
+		return listActiveSignals('^([x]?x-)?op-');
+	if(busname=='DPControl')
+		return listActiveSignals('^dpc[0-9]+_');
+	if(busname[0]=="-"){
+		// invert the value of the bus for display
+		var value=busToHex(busname.slice(1))
+		if(typeof value != "undefined")
+			return value.replace(/./g,function(x){return (15-parseInt(x,16)).toString(16)});
+		else
+			return undefined;;
+	} else {
+		return busToHex(busname);
+	}
+}
+
+function chipStatus(){
+	var ab = readAddressBus();
+	var machine1 =
+	        ' halfcyc:' + cycle +
+	        ' phi0:' + readBit('phi2') +
+                ' AB:' + hexWord(ab) +
+	        ' D:' + hexByte(readDataBus()) +
+	        ' RnW:' + readBit('rw') +
+	        ' VMA:' + readBit('vma');
+	var machine2 =
+	        ' PC:' + hexWord(readPC()) +
+	        ' A:' + hexByte(readAccA()) +
+	        ' B:' + hexByte(readAccB()) +
+	        ' IX:' + hexWord(readIX()) +
+	        ' SP:' + hexWord(readSP()) +
+	        ' ' + readPstring();
+	var machine3 = 
+		'Hz: ' + estimatedHz().toFixed(1);
+	if(typeof expertMode != "undefined") {
+		machine3 += ' Exec: ' + busToString('Execute'); // no T-state info for 6800 yet
+		if(isNodeHigh(nodenames['sync']))
+			machine3 += ' (Fetch: ' + busToString('Fetch') + ')';
+		if(goldenChecksum != undefined)
+			machine3 += " Chk:" + traceChecksum + ((traceChecksum==goldenChecksum)?" OK":" no match");
+	}
+
+	setStatus(machine1, machine2, machine3);
+	if (logThese.length>1) {
+		updateLogbox(logThese);
+	}
+	selectCell(ab);
+}
+
+// javascript derived from http://segher.ircgeeks.net/6800/OPS
+var disassembly={
+0x00: "!",
+0x01: "nop",
+0x02: "!",
+0x03: "!",
+0x04: "!",
+0x05: "!",
+0x06: "tap",
+0x07: "tpa",
+0x10: "sba",
+0x11: "cba",
+0x12: "!",
+0x13: "!",
+0x14: "!nba",
+0x15: "!",
+0x16: "tab",
+0x17: "tba",
+0x20: "bra N",
+0x21: "!",
+0x22: "bhi N",
+0x23: "bls N",
+0x24: "bcc N",
+0x25: "bcs N",
+0x26: "bne N",
+0x27: "beq N",
+0x30: "tsx",
+0x31: "ins",
+0x32: "pul a",
+0x33: "pul b",
+0x34: "des",
+0x35: "txs",
+0x36: "psh a",
+0x37: "psh b",
+0x40: "neg a",
+0x41: "!",
+0x42: "!",
+0x43: "com a",
+0x44: "lsr a",
+0x45: "!",
+0x46: "ror a",
+0x47: "asr a",
+0x50: "neg b",
+0x51: "!",
+0x52: "!",
+0x53: "com b",
+0x54: "lsr b",
+0x55: "!",
+0x56: "ror b",
+0x57: "asr b",
+0x60: "neg Nx",
+0x61: "!",
+0x62: "!",
+0x63: "com Nx",
+0x64: "lsr Nx",
+0x65: "!",
+0x66: "ror Nx",
+0x67: "asr Nx",
+0x70: "neg NN",
+0x71: "!",
+0x72: "!",
+0x73: "com NN",
+0x74: "lsr NN",
+0x75: "!",
+0x76: "ror NN",
+0x77: "asr NN",
+0x80: "sub a #",
+0x81: "cmp a #",
+0x82: "sbc a #",
+0x83: "!",
+0x84: "and a #",
+0x85: "bit a #",
+0x86: "lda a #",
+0x87: "!",
+0x90: "sub a N",
+0x91: "cmp a N",
+0x92: "sbc a N",
+0x93: "!",
+0x94: "and a N",
+0x95: "bit a N",
+0x96: "lda a N",
+0x97: "sta a N",
+0xa0: "sub a Nx",
+0xa1: "cmp a Nx",
+0xa2: "sbc a Nx",
+0xa3: "!",
+0xa4: "and a Nx",
+0xa5: "bit a Nx",
+0xa6: "lda a Nx",
+0xa7: "sta a Nx",
+0xb0: "sub a NN",
+0xb1: "cmp a NN",
+0xb2: "sbc a NN",
+0xb3: "!",
+0xb4: "and a NN",
+0xb5: "bit a NN",
+0xb6: "lda a NN",
+0xb7: "sta a NN",
+0xc0: "sub b #",
+0xc1: "cmp b #",
+0xc2: "sbc b #",
+0xc3: "!",
+0xc4: "and b #",
+0xc5: "bit b #",
+0xc6: "lda b #",
+0xc7: "!",
+0xd0: "sub b N",
+0xd1: "cmp b N",
+0xd2: "sbc b N",
+0xd3: "!",
+0xd4: "and b N",
+0xd5: "bit b N",
+0xd6: "lda b N",
+0xd7: "sta b N",
+0xe0: "sub b Nx",
+0xe1: "cmp b Nx",
+0xe2: "sbc b Nx",
+0xe3: "!",
+0xe4: "and b Nx",
+0xe5: "bit b Nx",
+0xe6: "lda b Nx",
+0xe7: "sta b Nx",
+0xf0: "sub b NN",
+0xf1: "cmp b NN",
+0xf2: "sbc b NN",
+0xf3: "!",
+0xf4: "and b NN",
+0xf5: "bit b NN",
+0xf6: "lda b NN",
+0xf7: "sta b NN",
+0x08: "inx",
+0x09: "dex",
+0x0a: "clv",
+0x0b: "sev",
+0x0c: "clc",
+0x0d: "sec",
+0x0e: "cli",
+0x0f: "sei",
+0x18: "!",
+0x19: "daa",
+0x1a: "!",
+0x1b: "aba",
+0x1c: "!",
+0x1d: "!",
+0x1e: "!",
+0x1f: "!",
+0x28: "bvc N",
+0x29: "bvs N",
+0x2a: "bpl N",
+0x2b: "bmi N",
+0x2c: "bge N",
+0x2d: "blt N",
+0x2e: "bgt N",
+0x2f: "ble N",
+0x38: "!",
+0x39: "rts",
+0x3a: "!",
+0x3b: "rti",
+0x3c: "!",
+0x3d: "!",
+0x3e: "wai",
+0x3f: "swi",
+0x48: "asl a",
+0x49: "rol a",
+0x4a: "dec a",
+0x4b: "!",
+0x4c: "inc a",
+0x4d: "tst a",
+0x4e: "!",
+0x4f: "clr a",
+0x58: "asl b",
+0x59: "rol b",
+0x5a: "dec b",
+0x5b: "!",
+0x5c: "inc b",
+0x5d: "tst b",
+0x5e: "!",
+0x5f: "clr b",
+0x68: "asl Nx",
+0x69: "rol Nx",
+0x6a: "dec Nx",
+0x6b: "!",
+0x6c: "inc Nx",
+0x6d: "tst Nx",
+0x6e: "jmp Nx",
+0x6f: "clr Nx",
+0x78: "asl NN",
+0x79: "rol NN",
+0x7a: "dec NN",
+0x7b: "!",
+0x7c: "inc NN",
+0x7d: "tst NN",
+0x7e: "jmp NN",
+0x7f: "clr NN",
+0x88: "eor a #",
+0x89: "adc a #",
+0x8a: "ora a #",
+0x8b: "add a #",
+0x8c: "cpx ##",
+0x8d: "bsr N",
+0x8e: "lds ##",
+0x8f: "!",
+0x98: "eor a N",
+0x99: "adc a N",
+0x9a: "ora a N",
+0x9b: "add a N",
+0x9c: "cpx N",
+0x9d: "!hcf",
+0x9e: "lds N",
+0x9f: "sts N",
+0xa8: "eor a Nx",
+0xa9: "adc a Nx",
+0xaa: "ora a Nx",
+0xab: "add a Nx",
+0xac: "cpx Nx",
+0xad: "jsr Nx",
+0xae: "lds Nx",
+0xaf: "sts Nx",
+0xb8: "eor a NN",
+0xb9: "adc a NN",
+0xba: "ora a NN",
+0xbb: "add a NN",
+0xbc: "cpx NN",
+0xbd: "jsr NN",
+0xbe: "lds NN",
+0xbf: "sts NN",
+0xc8: "eor b #",
+0xc9: "adc b #",
+0xca: "ora b #",
+0xcb: "add b #",
+0xcc: "!",
+0xcd: "!",
+0xce: "ldx ##",
+0xcf: "!",
+0xd8: "eor b N",
+0xd9: "adc b N",
+0xda: "ora b N",
+0xdb: "add b N",
+0xdc: "!",
+0xdd: "!hcf",
+0xde: "ldx N",
+0xdf: "stx N",
+0xe8: "eor b Nx",
+0xe9: "adc b Nx",
+0xea: "ora b Nx",
+0xeb: "add b Nx",
+0xec: "!",
+0xed: "!",
+0xee: "ldx Nx",
+0xef: "stx Nx",
+0xf8: "eor b NN",
+0xf9: "adc b NN",
+0xfa: "ora b NN",
+0xfb: "add b NN",
+0xfc: "!",
+0xfd: "!",
+0xfe: "ldx NN",
+0xff: "stx NN",
+};

chip-6800/testprogram.js

@@ -0,0 +1,31 @@
+// This file testprogram.js can be substituted by one of several tests
+testprogramAddress=0x0000;
+
+// we want to auto-clear the console if any output is sent by the program
+var consoleboxStream="";
+
+// demonstrate write hook
+writeTriggers[0x8000]="consoleboxStream += String.fromCharCode(d);"+
+                      "consolebox.innerHTML = consoleboxStream;";
+
+// demonstrate read hook (not used by this test program)
+readTriggers[0x8004]="((consolegetc==undefined)?0:0xff)";  // return zero until we have a char
+readTriggers[0x8000]="var c=consolegetc; consolegetc=undefined; (c)";
+
+// for opcodes, see http://www.textfiles.com/programming/CARDS/6800
+
+testprogram = [
+  0xce, 0x43, 0x21,  // LDX #4321
+  0x35,              // TXS
+  0xce, 0x80, 0x00,  // LDX #8000
+  0xc6, 0x40,        // LDAB #$40
+  0xbd, 0x00, 0x10,  // JSR $0010
+  0x7e, 0x00, 0x09,  // JMP $0009
+  0x01,              // NOP
+  0x4a,              // DECA
+  0xe7, 0x00,        // STAB 0, X
+  0x7c, 0x00, 0x0f,  // INC $0F
+  0x0d,              // SEC
+  0xc9, 0x02,        // ADCB #$02
+  0x39,              // RTS
+]

chip-z80/nodenames.js

@@ -0,0 +1,530 @@
+// ***********************************************************
+// * This file is automatically generated by Z80Simulator.   *
+// * Please do not manually edit! Instead, find a transistor *
+// * that uses the new signal and use FindTransistor(x,y) in *
+// * Z80Simulator to cause that signal to be added.          *
+// * This seems a pain, but it has two advantages:           *
+// * - all signals are then available in Z80Simulator        *
+// * - it avoids renumbering issues if/when the PNGs change  *
+// ***********************************************************
+var nodenames ={
+// Pads
+vss: 1,
+vcc: 2,
+clk: 3,
+ab0: 5,
+ab1: 6,
+ab2: 7,
+ab3: 8,
+ab4: 9,
+ab5: 10,
+ab6: 11,
+ab7: 12,
+ab8: 13,
+ab9: 14,
+ab10: 15,
+ab11: 16,
+ab12: 17,
+ab13: 18,
+ab14: 19,
+ab15: 20,
+_reset: 21,
+_wait: 22,
+wait: 22,
+_int: 23,
+int: 23,
+_irq: 23,
+irq: 23,
+_nmi: 24,
+nmi: 24,
+_busrq: 25,
+busrq: 25,
+_m1: 26,
+_rd: 27,
+_wr: 28,
+_mreq: 29,
+_iorq: 30,
+_rfsh: 31,
+db0: 32,
+db1: 33,
+db2: 34,
+db3: 35,
+db4: 36,
+db5: 37,
+db6: 38,
+db7: 39,
+_halt: 40,
+_busak: 41,
+// T-States
+t1: 115,
+t2: 137,
+t3: 144,
+t4: 166,
+t5: 134,
+t6: 168,
+// Machine cycles
+m1: 155,
+m2: 173,
+m3: 163,
+m4: 159,
+m5: 209,
+m6: 210,
+// EXX latches
+ex_af: 631,
+ex_bcdehl: 1770,
+ex_dehl0: 625,
+ex_dehl1: 629,
+ex_dehl_combined: 626,
+// Registers
+reg_a0: 2245,
+reg_a1: 2319,
+reg_a2: 2357,
+reg_a3: 2442,
+reg_a4: 2463,
+reg_a5: 2552,
+reg_a6: 2586,
+reg_a7: 2656,
+reg_f0: 1827,
+reg_f1: 1903,
+reg_f2: 1928,
+reg_f3: 2009,
+reg_f4: 2032,
+reg_f5: 2107,
+reg_f6: 2132,
+reg_f7: 2209,
+reg_b0: 2242,
+reg_b1: 2316,
+reg_b2: 2354,
+reg_b3: 2439,
+reg_b4: 2460,
+reg_b5: 2549,
+reg_b6: 2583,
+reg_b7: 2653,
+reg_c0: 1824,
+reg_c1: 1900,
+reg_c2: 1925,
+reg_c3: 2006,
+reg_c4: 2029,
+reg_c5: 2104,
+reg_c6: 2129,
+reg_c7: 2206,
+reg_d0: 2238,
+reg_d1: 2312,
+reg_d2: 2350,
+reg_d3: 2435,
+reg_d4: 2456,
+reg_d5: 2545,
+reg_d6: 2579,
+reg_d7: 2649,
+reg_e0: 1820,
+reg_e1: 1896,
+reg_e2: 1921,
+reg_e3: 2002,
+reg_e4: 2025,
+reg_e5: 2100,
+reg_e6: 2125,
+reg_e7: 2202,
+reg_h0: 2240,
+reg_h1: 2314,
+reg_h2: 2352,
+reg_h3: 2437,
+reg_h4: 2458,
+reg_h5: 2547,
+reg_h6: 2581,
+reg_h7: 2651,
+reg_l0: 1822,
+reg_l1: 1898,
+reg_l2: 1923,
+reg_l3: 2004,
+reg_l4: 2027,
+reg_l5: 2102,
+reg_l6: 2127,
+reg_l7: 2204,
+reg_w0: 2234,
+reg_w1: 2308,
+reg_w2: 2346,
+reg_w3: 2431,
+reg_w4: 2452,
+reg_w5: 2541,
+reg_w6: 2575,
+reg_w7: 2645,
+reg_z0: 1816,
+reg_z1: 1892,
+reg_z2: 1917,
+reg_z3: 1998,
+reg_z4: 2021,
+reg_z5: 2096,
+reg_z6: 2121,
+reg_z7: 2198,
+reg_pch0: 2232,
+reg_pch1: 2306,
+reg_pch2: 2344,
+reg_pch3: 2429,
+reg_pch4: 2450,
+reg_pch5: 2539,
+reg_pch6: 2573,
+reg_pch7: 2643,
+reg_pcl0: 1814,
+reg_pcl1: 1890,
+reg_pcl2: 1915,
+reg_pcl3: 1996,
+reg_pcl4: 2019,
+reg_pcl5: 2094,
+reg_pcl6: 2119,
+reg_pcl7: 2196,
+reg_sph0: 2235,
+reg_sph1: 2309,
+reg_sph2: 2347,
+reg_sph3: 2432,
+reg_sph4: 2453,
+reg_sph5: 2542,
+reg_sph6: 2576,
+reg_sph7: 2646,
+reg_spl0: 1817,
+reg_spl1: 1893,
+reg_spl2: 1918,
+reg_spl3: 1999,
+reg_spl4: 2022,
+reg_spl5: 2097,
+reg_spl6: 2122,
+reg_spl7: 2199,
+reg_ixh0: 2237,
+reg_ixh1: 2311,
+reg_ixh2: 2349,
+reg_ixh3: 2434,
+reg_ixh4: 2455,
+reg_ixh5: 2544,
+reg_ixh6: 2578,
+reg_ixh7: 2648,
+reg_ixl0: 1819,
+reg_ixl1: 1895,
+reg_ixl2: 1920,
+reg_ixl3: 2001,
+reg_ixl4: 2024,
+reg_ixl5: 2099,
+reg_ixl6: 2124,
+reg_ixl7: 2201,
+reg_iyh0: 2236,
+reg_iyh1: 2310,
+reg_iyh2: 2348,
+reg_iyh3: 2433,
+reg_iyh4: 2454,
+reg_iyh5: 2543,
+reg_iyh6: 2577,
+reg_iyh7: 2647,
+reg_iyl0: 1818,
+reg_iyl1: 1894,
+reg_iyl2: 1919,
+reg_iyl3: 2000,
+reg_iyl4: 2023,
+reg_iyl5: 2098,
+reg_iyl6: 2123,
+reg_iyl7: 2200,
+reg_i0: 2233,
+reg_i1: 2307,
+reg_i2: 2345,
+reg_i3: 2430,
+reg_i4: 2451,
+reg_i5: 2540,
+reg_i6: 2574,
+reg_i7: 2644,
+reg_r0: 1815,
+reg_r1: 1891,
+reg_r2: 1916,
+reg_r3: 1997,
+reg_r4: 2020,
+reg_r5: 2095,
+reg_r6: 2120,
+reg_r7: 2197,
+reg_aa0: 2244,
+reg_aa1: 2318,
+reg_aa2: 2356,
+reg_aa3: 2441,
+reg_aa4: 2462,
+reg_aa5: 2551,
+reg_aa6: 2585,
+reg_aa7: 2655,
+reg_ff0: 1826,
+reg_ff1: 1902,
+reg_ff2: 1927,
+reg_ff3: 2008,
+reg_ff4: 2031,
+reg_ff5: 2106,
+reg_ff6: 2131,
+reg_ff7: 2208,
+reg_bb0: 2243,
+reg_bb1: 2317,
+reg_bb2: 2355,
+reg_bb3: 2440,
+reg_bb4: 2461,
+reg_bb5: 2550,
+reg_bb6: 2584,
+reg_bb7: 2654,
+reg_cc0: 1825,
+reg_cc1: 1901,
+reg_cc2: 1926,
+reg_cc3: 2007,
+reg_cc4: 2030,
+reg_cc5: 2105,
+reg_cc6: 2130,
+reg_cc7: 2207,
+reg_dd0: 2239,
+reg_dd1: 2313,
+reg_dd2: 2351,
+reg_dd3: 2436,
+reg_dd4: 2457,
+reg_dd5: 2546,
+reg_dd6: 2580,
+reg_dd7: 2650,
+reg_ee0: 1821,
+reg_ee1: 1897,
+reg_ee2: 1922,
+reg_ee3: 2003,
+reg_ee4: 2026,
+reg_ee5: 2101,
+reg_ee6: 2126,
+reg_ee7: 2203,
+reg_hh0: 2241,
+reg_hh1: 2315,
+reg_hh2: 2353,
+reg_hh3: 2438,
+reg_hh4: 2459,
+reg_hh5: 2548,
+reg_hh6: 2582,
+reg_hh7: 2652,
+reg_ll0: 1823,
+reg_ll1: 1899,
+reg_ll2: 1924,
+reg_ll3: 2005,
+reg_ll4: 2028,
+reg_ll5: 2103,
+reg_ll6: 2128,
+reg_ll7: 2205,
+// Data buses and control
+dp_dl: 82,
+dl_dp: 165,
+load_ir: 1354,
+dlatch0: 123,
+dlatch1: 195,
+dlatch2: 414,
+dlatch3: 930,
+dlatch4: 1000,
+dlatch5: 872,
+dlatch6: 751,
+dlatch7: 358,
+dl_d: 87,
+d_dl: 133,
+dbus0: 138,
+dbus1: 196,
+dbus2: 412,
+dbus3: 480,
+dbus4: 485,
+dbus5: 486,
+dbus6: 380,
+dbus7: 370,
+_instr0: 1350,
+_instr1: 1360,
+_instr2: 1366,
+_instr3: 1380,
+_instr4: 1388,
+_instr5: 1395,
+_instr6: 1370,
+_instr7: 1375,
+instr0: 1348,
+instr1: 1359,
+instr2: 1365,
+instr3: 1379,
+instr4: 1387,
+instr5: 1394,
+instr6: 1369,
+instr7: 1374,
+d_u: 546,
+ubus0: 545,
+ubus1: 528,
+ubus2: 526,
+ubus3: 770,
+ubus4: 779,
+ubus5: 790,
+ubus6: 716,
+ubus7: 525,
+u_v: 750,
+vbus0: 755,
+vbus1: 772,
+vbus2: 783,
+vbus3: 796,
+vbus4: 803,
+vbus5: 808,
+vbus6: 836,
+vbus7: 839,
+rl_wr: 678,
+rh_wr: 652,
+r_u: 692,
+r_v: 693,
+regbit0: 702,
+regbit1: 732,
+regbit2: 738,
+regbit3: 775,
+regbit4: 776,
+regbit5: 807,
+regbit6: 809,
+regbit7: 864,
+regbit8: 870,
+regbit9: 902,
+regbit10: 906,
+regbit11: 934,
+regbit12: 935,
+regbit13: 970,
+regbit14: 973,
+regbit15: 999,
+r_p: 1785,
+r_x1: 608,
+pcbit0: 703,
+pcbit1: 731,
+pcbit2: 739,
+pcbit3: 774,
+pcbit4: 777,
+pcbit5: 806,
+pcbit6: 810,
+pcbit7: 863,
+pcbit8: 871,
+pcbit9: 901,
+pcbit10: 907,
+pcbit11: 933,
+pcbit12: 936,
+pcbit13: 969,
+pcbit14: 974,
+pcbit15: 998,
+// ALU
+alubus0: 837,
+alubus1: 889,
+alubus2: 937,
+alubus3: 983,
+alubus4: 852,
+alubus5: 903,
+alubus6: 951,
+alubus7: 995,
+alua0: 850,
+alua1: 899,
+alua2: 947,
+alua3: 993,
+alua4: 868,
+alua5: 920,
+alua6: 968,
+alua7: 1007,
+alub0: 845,
+alub1: 897,
+alub2: 944,
+alub3: 988,
+alub4: 867,
+alub5: 918,
+alub6: 966,
+alub7: 1005,
+aluout0: 2211,
+aluout1: 2338,
+aluout2: 2504,
+aluout3: 816,
+alulat0: 865,
+alulat1: 912,
+alulat2: 960,
+alulat3: 1002,
+// PLA
+pla0: 287,
+pla1: 332,
+pla2: 314,
+pla3: 333,
+pla4: 315,
+pla5: 334,
+pla6: 316,
+pla7: 335,
+pla8: 317,
+pla9: 336,
+pla10: 318,
+pla11: 361,
+pla12: 261,
+pla13: 337,
+pla14: 319,
+pla15: 464,
+pla16: 288,
+pla17: 338,
+pla18: 320,
+pla19: 364,
+pla20: 325,
+pla21: 324,
+pla22: 308,
+pla23: 289,
+pla24: 339,
+pla25: 313,
+pla26: 340,
+pla27: 290,
+pla28: 341,
+pla29: 291,
+pla30: 342,
+pla31: 292,
+pla32: 365,
+pla33: 293,
+pla34: 362,
+pla35: 294,
+pla36: 331,
+pla37: 293,
+pla38: 343,
+pla39: 296,
+pla40: 297,
+pla41: 298,
+pla42: 344,
+pla43: 299,
+pla44: 269,
+pla45: 300,
+pla46: 237,
+pla47: 301,
+pla48: 345,
+pla49: 302,
+pla50: 346,
+pla51: 264,
+pla52: 266,
+pla53: 347,
+pla54: 303,
+pla55: 356,
+pla56: 227,
+pla57: 366,
+pla58: 304,
+pla59: 305,
+pla60: 271,
+pla61: 348,
+pla62: 306,
+pla63: 309,
+pla64: 311,
+pla65: 312,
+pla66: 307,
+pla67: 367,
+pla68: 272,
+pla69: 349,
+pla70: 273,
+pla71: 350,
+pla72: 274,
+pla73: 351,
+pla74: 275,
+pla75: 276,
+pla76: 268,
+pla77: 352,
+pla78: 277,
+pla79: 278,
+pla80: 279,
+pla81: 280,
+pla82: 368,
+pla83: 281,
+pla84: 282,
+pla85: 283,
+pla86: 284,
+pla87: 285,
+pla88: 286,
+pla89: 321,
+pla90: 353,
+pla91: 322,
+pla92: 354,
+pla93: 323,
+pla94: 369,
+pla95: 258,
+pla96: 249,
+pla97: 245,
+pla98: 355,
+}

chip-z80/testprogram.js

@@ -0,0 +1,73 @@
+// This file testprogram.js can be substituted by one of several tests
+testprogramAddress=0x0000;
+
+// we want to auto-clear the console if any output is sent by the program
+var consoleboxStream="";
+
+// demonstrate write hook
+writeTriggers[0x8000]="consoleboxStream += String.fromCharCode(d);"+
+    "consolebox.innerHTML = consoleboxStream;";
+
+// demonstrate read hook (not used by this test program)
+readTriggers[0x8004]="((consolegetc==undefined)?0:0xff)";  // return zero until we have a char
+readTriggers[0x8000]="var c=consolegetc; consolegetc=undefined; (c)";
+
+// for opcodes, see http://www.textfiles.com/programming/CARDS/6800
+
+testprogram = [
+    0x00,                    // NOP
+    0x31, 0x00, 0x01,        // LD SP,0x0100
+    0xCD, 0x0B, 0x00,        // CALL $000B
+    0x00,                    // NOP
+    0x21, 0x78, 0x56,        // LD HL,$5678
+    0x21, 0x34, 0x12,        // LD HL,$1234
+    0xe5,                    // PUSH HL
+    0x00,                    // NOP
+    0x00,                    // NOP
+    0x3C,                    // INC A
+    0x04,                    // INC B
+    0x15,                    // DEC D
+    0x24,                    // INC H
+    0xEB,                    // EXX DE,HL
+    0x00,                    // NOP
+    0x3C,                    // INC A
+    0x04,                    // INC B
+    0x15,                    // DEC D
+    0x24,                    // INC H
+    0xD9,                    // EXX
+    0x00,                    // NOP
+    0x3C,                    // INC A
+    0x04,                    // INC B
+    0x15,                    // DEC D
+    0x24,                    // INC H
+    0xEB,                    // EXX DE,HL
+    0x00,                    // NOP
+    0x3C,                    // INC A
+    0x04,                    // INC B
+    0x15,                    // DEC D
+    0x24,                    // INC H
+    0x08,                    // EXX AF,AF'
+    0x00,                    // NOP
+    0x3C,                    // INC A
+    0x04,                    // INC B
+    0x15,                    // DEC D
+    0x24,                    // INC H
+    0x00,                    // NOP
+    0x00,                    // NOP
+    0x00,                    // NOP
+    0x21, 0x00, 0x01,        // LD HL,$0100
+    0x36, 0xCC,              // LD (HL),$CC
+    0x00,                    // NOP
+    0x7E,                    // LD A, (HL)
+    0x00,                    // NOP
+    // Pavel's original test program
+    0x21, 0x34, 0x12,        // LD HL,$1234
+    0x31, 0xfe, 0xdc,        // LD SP,0xDCFE
+    0xe5,                    // PUSH HL
+    0x21, 0x78, 0x56,        // LD HL,$5678
+    0xe3,                    // EX (SP),HL
+    0xdd, 0x21, 0xbc,0x9a,   // LD IX, 0x9ABC
+    0xdd, 0xe3,              // EX (SP),IX
+    0x76,                    // HALT
+    0x00                     // NOP    
+]

chipsim.js

@@ -21,123 +21,116 @@
 */
 
 var ctrace = false;
-var noGraphics = false;
-var loglevel = 3;
-var ridx = 0;
+var traceTheseNodes = [];
+var traceTheseTransistors = [];
+var loglevel = 0;
+var recalclist = new Array();
+var recalcHash = new Array();
+var group = new Array();
 
 function recalcNodeList(list){
 	var n = list[0];
-	var recalclist = new Array();
+	recalclist = new Array();
+	recalcHash = new Array();
 	for(var j=0;j<100;j++){		// loop limiter
 		if(list.length==0) return;
-		if(ctrace) console.log(j, list);
-		for(var i in list) recalcNode(list[i], recalclist);
+		if(ctrace) {
+			var i;
+			for(i=0;i<traceTheseNodes.length;i++) {
+				if(list.indexOf(traceTheseNodes[i])!=-1) break;
+			}
+			if((traceTheseNodes.length==0)||(list.indexOf(traceTheseNodes[i])==-1)) {
+				console.log('recalcNodeList iteration: ', j, list.length, 'nodes');
+			} else {
+				console.log('recalcNodeList iteration: ', j, list.length, 'nodes', list);
+			}
+		}
+		list.forEach(recalcNode);
 		list = recalclist;
 		recalclist = new Array();
+		recalcHash = new Array();
 	}
 	if(ctrace) console.log(n,'looping...');
 }
 
-function recalcNode(node, recalclist){
+function recalcNode(node){
 	if(node==ngnd) return;
 	if(node==npwr) return;
-	var group = getNodeGroup(node);
-	var newv = getNodeValue(group);
-	if(ctrace) console.log('recalc', node, group);
-	for(var i in group){
-		var n = nodes[group[i]];
-		if(n.state!=newv && ctrace) console.log(group[i], n.state, newv);
-		n.state = newv;
-		for(var t in n.gates) recalcTransistor(n.gates[t], recalclist);
-	}
+	getNodeGroup(node);
+	var newState = getNodeValue();
+	if(ctrace && (traceTheseNodes.indexOf(node)!=-1))
+		console.log('recalc', node, group);
+	group.forEach(function(i){
+		var n = nodes[i];
+		if(n.state==newState) return;
+		n.state = newState;
+		n.gates.forEach(function(t){
+			if(n.state) turnTransistorOn(t);
+			else turnTransistorOff(t);});
+	});
 }
 
-function recalcTransistor(tn, recalclist){
-	var t = transistors[tn];
-	if(isNodeHigh(t.gate)) turnTransistorOn(t, recalclist);
-	else turnTransistorOff(t, recalclist);
-}
-
-function turnTransistorOn(t, recalclist){
+function turnTransistorOn(t){
 	if(t.on) return;
-	if(ctrace) console.log(t.name, 'on', t.gate, t.c1, t.c2);
+	if(ctrace && (traceTheseTransistors.indexOf(t.name)!=-1))
+		console.log(t.name, 'on', t.gate, t.c1, t.c2);
 	t.on = true;
-	addRecalcNode(t.c1, recalclist);
-	addRecalcNode(t.c2, recalclist);
+	addRecalcNode(t.c1);
 }
 
-function turnTransistorOff(t, recalclist){
+function turnTransistorOff(t){
 	if(!t.on) return;
-	if(ctrace) console.log(t.name, 'off', t.gate, t.c1, t.c2);
+	if(ctrace && (traceTheseTransistors.indexOf(t.name)!=-1))
+		console.log(t.name, 'off', t.gate, t.c1, t.c2);
 	t.on = false;
-	floatnode(t.c1);
-	floatnode(t.c2);
-	addRecalcNode(t.c1, recalclist);
-	addRecalcNode(t.c2, recalclist);
+	addRecalcNode(t.c1);
+	addRecalcNode(t.c2);
 }
 
-function floatnode(nn){
-	if(nn==ngnd) return;
-	if(nn==npwr) return;
-	var n = nodes[nn];
-	if(n.state=='gnd') n.state = 'fl';
-	if(n.state=='pd') n.state = 'fl';
-	if(n.state=='vcc') n.state = 'fh';
-	if(n.state=='pu') n.state = 'fh';
-	if(ctrace) console.log('floating', nn, 'to', n.state);
-}
-
-function addRecalcNode(nn, recalclist){
-	if(nn==ngnd) return;
-	if(nn==npwr) return;
-	if(arrayContains(recalclist, nn)) return;
-	recalclist.push(nn);
-//	setAdd(recalclist, nn);
+function addRecalcNode(nn){
+       if(nn==ngnd) return;
+       if(nn==npwr) return;
+       if(recalcHash[nn] == 1)return; 
+       recalclist.push(nn);
+       recalcHash[nn] = 1;
 }
 
 function getNodeGroup(i){
-	var group = new Array();
-	addNodeToGroup(i, group);
-	return group;
+	group = new Array();
+	addNodeToGroup(i);
 }
 
-function addNodeToGroup(i, group){
-	if(arrayContains(group, i)) return;
+function addNodeToGroup(i){
+	if(group.indexOf(i) != -1) return;
 	group.push(i);
 	if(i==ngnd) return;
 	if(i==npwr) return;
-	for(var t in nodes[i].c1c2s) addNodeTransistor(i, nodes[i].c1c2s[t], group);
-}
-
-function addNodeTransistor(node, t, group){
-	var tr = transistors[t];
-	if(!tr.on) return;
-	var other;
-	if(tr.c1==node) other=tr.c2;
-	if(tr.c2==node) other=tr.c1;
-	addNodeToGroup(other, group);
+	nodes[i].c1c2s.forEach(
+		function(t){
+			if(!t.on) return;
+			var other;
+			if(t.c1==i) other=t.c2;
+			if(t.c2==i) other=t.c1;
+			addNodeToGroup(other);});
 }
 
 
-function getNodeValue(group){
-	if(arrayContains(group, ngnd)) return 'gnd';
-	if(arrayContains(group, npwr)) return 'vcc';
-	var flstate;
+function getNodeValue(){
+	if(arrayContains(group, ngnd)) return false;
+	if(arrayContains(group, npwr)) return true;
 	for(var i in group){
 		var nn = group[i];
 		var n = nodes[nn];
-		if(n.pullup) return 'pu';
-		if(n.pulldown) return 'pd';
-		if((n.state=='fl')&&(flstate==undefined)) flstate = 'fl';
-		if(n.state=='fh') flstate = 'fh';
+		if(n.pullup) return true;
+		if(n.pulldown) return false;
+		if(n.state) return true;
 	}
-	if(flstate==undefined && ctrace) console.log(group);
-	return flstate;
+	return false;
 }
 
 
 function isNodeHigh(nn){
-	return arrayContains(['vcc','pu','fh'], nodes[nn].state);
+	return(nodes[nn].state);
 }
 
 function saveString(name, str){
@@ -150,30 +143,39 @@ function saveString(name, str){
 
 function allNodes(){
 	var res = new Array();
-	for(var i in nodes) if((i!=npwr)&&(i!=ngnd)) res.push(i);
+	var ii = 0;
+	for(var i in nodes) {
+		// Don't feed numeric strings to recalcNodeList(). Numeric
+		// strings can cause a (data dependent) duplicate node number
+		// hiccup when accumulating a node group's list, ie:
+		// group => [ "49", 483, 49 ]
+		ii = Number( i );
+		if((ii!=npwr)&&(ii!=ngnd)) res.push(ii);
+	}
 	return res;
 }
 
 function stateString(){
-	var codes = {gnd: 'g', vcc: 'v', pu: 'p', pd: 'd', fh: 'f', fl: 'l'};
+	var codes = ['l','h'];
 	var res = '';
-	for(var i=0;i<1725;i++){
+	for(var i=0;i<nodes.length;i++){
 		var n = nodes[i];
 		if(n==undefined) res+='x';
 		else if(i==ngnd) res+='g';
 		else if(i==npwr) res+='v';
-		else res+= codes[n.state];
+		else res+= codes[0+n.state];
 	}
 	return res;
 }
 
 function showState(str){
-	var codes = {g: 'gnd', v: 'vcc', p: 'pu', d: 'pd', f: 'fh', l: 'fl'};
+	var codes = {g: false, h: true, v: true, l: false};
 	for(var i=0;i<str.length;i++){
 		if(str[i]=='x') continue;
-		nodes[i].state = codes[str[i]];
+		var state = codes[str[i]];
+		nodes[i].state = state;
 		var gates = nodes[i].gates;
-		for(var t in gates) transistors[gates[t]].on = isNodeHigh(i);
+		gates.forEach(function(t){t.on=state;});
 	}
 	refresh();
 }
@@ -199,12 +201,4 @@ function setLow(name){
 	recalcNodeList([nn]);
 }
 
-function setAdd(arr, el){
-	var idx = ridx%(arr.length+1);
-	ridx+=131;
-	ridx%=123;
-	arr.splice(idx, 0, el);
-	return arr;
-}
-
 function arrayContains(arr, el){return arr.indexOf(el)!=-1;}

expert-6800.html

@@ -0,0 +1,153 @@
+<!DOCTYPE html>
+
+<head>
+<title>Visual 6800 in JavaScript</title>
+<style type="text/css">@import "expert.css";</style>
+<script src="chip-6800/segdefs.js"></script>
+<script src="chip-6800/transdefs.js"></script>
+<script src="chip-6800/nodenames.js"></script>
+<script src="wires.js"></script>
+<script src="expertWires.js"></script>
+<script src="chipsim.js"></script>
+<script src="memtable.js"></script>
+<script src="macros.js"></script>
+<script src="chip-6800/support.js"></script>
+<script src="chip-6800/testprogram.js"></script>
+<script src="3rdparty/jquery-1.3.2.min.js"></script>
+<script src="3rdparty/jquery.cookie.js"></script>
+<script src="3rdparty/splitter.js"></script>
+
+<script type="text/javascript">
+function handleOnload() {
+	/MSIE (\d+\.\d+);/.test(navigator.appVersion);
+	IEVersion=Number(RegExp.$1);
+	if((navigator.appName == 'Microsoft Internet Explorer') && (IEVersion<9)){
+		document.getElementById('browsertrouble').innerHTML=
+			'<p>Sorry, '+navigator.appName+' not supported - showing you a picture instead!</p>';
+		document.getElementById('frame').innerHTML='<a href="browsertrouble.html"><img src="images/jssim2.png" style="border:10px"></a>';
+	}else{
+		setTimeout(setup,200);
+	}
+};
+
+// initialise splitter (built on jquery)
+$().ready(function(){
+	$("#frame").splitter({
+		type: "v",
+		outline: true,
+		minLeft: 20,
+		sizeLeft: 810,
+		resizeToWidth: true,
+		anchorToWindow: true,
+	});
+	$("#rightcolumn").splitter({
+		type: "h",
+		outline: true,
+		sizeBottom: 180,
+		minTop: 100,
+	});
+});
+</script>
+
+</head>
+
+<body onload="handleOnload();">
+<span id="plain">
+<a href="http://www.visual6502.org/faq.html">FAQ</a>&nbsp;
+<a href="http://blog.visual6502.org">Blog</a>&nbsp;
+<a href="http://www.visual6502.org/links.html">Links</a>&nbsp;
+<a href="http://github.com/trebonian/visual6502">Source</a>&nbsp;
+<a href="http://www.textfiles.com/programming/CARDS/6800">6800 instruction card</a>&nbsp;
+<a href="http://www.sbprojects.com/sbasm/6800.htm#model">programming model</a>&nbsp;
+</span>
+<div class="frame" id="frame">
+<div class="leftcolumn" id="leftcolumn">
+<div id="chipsurround" tabindex="1">
+<div class="chip" id="chip">
+<span id="waiting">Please wait, graphics initialising...</span>
+<canvas class="chip" id="chipbg"></canvas>
+<canvas class="chip" id="overlay"></canvas>
+<canvas class="chip" id="hilite"></canvas>
+<canvas class="chip" id="hitbuffer"></canvas>
+</div>
+</div> <!-- chipsurround -->
+<div class="nochip" id="nochip">
+  <form>
+  <input type="button" value="Show chip layout" onclick="updateChipLayoutVisibility(true)" />
+  </form>
+</div>
+<div id="layoutControlPanel">
+  Use 'z' or '>' to zoom in, 'x' or '<' to zoom out, click to probe signals and drag to pan.
+  <form id="updateShow"> Show:
+  <input type="checkbox" name="1" id="updateShow1" onchange="updateShow(this.name,this.checked)" />(diffusion)
+  <input type="checkbox" name="3" id="updateShow3" onchange="updateShow(this.name,this.checked)" />(grounded diffusion)
+  <input type="checkbox" name="4" id="updateShow4" onchange="updateShow(this.name,this.checked)" />(powered diffusion)
+  <input type="checkbox" name="5" id="updateShow5" onchange="updateShow(this.name,this.checked)" />(polysilicon)
+  <input type="checkbox" name="0" id="updateShow0" onchange="updateShow(this.name,this.checked)" />(metal)
+  <input type="checkbox" name="2" id="updateShow2" onchange="updateShow(this.name,this.checked)" />(protection)
+  </form>
+  <form action="javascript:hiliteNodeList();">
+  <input type="button" value="Find:" onclick="hiliteNodeList();" />
+  <input type="text" id="HighlightThese" name="HighlightThese" value="" />
+  <input type="button" value="Clear Highlighting" onclick="clearHighlight();" />
+  <span class="animatebox">
+    Animate during simulation:
+    <input type="checkbox" id="animateModeCheckbox" onchange="updateChipLayoutAnimation(this.checked)" 
+    /></span>
+  </form>
+  <form>
+  <input type="button" value="Hide Chip Layout" onclick="updateChipLayoutVisibility(false)" />
+  <a href="" id="linkHere" >Link to this location</a>
+  </form>
+</div>
+</div> <!-- closing leftcolumn -->
+<div class="rightcolumn" id="rightcolumn">
+<div id="righttopdiv">
+<div class = "buttons">
+  <div class="twobuttons">
+    <a href ="javascript:stopChip()" id="stop"><img class="navstop" src="images/stop.png" title="stop"></a>
+    <a href ="javascript:runChip()"  id="start"><img class="navplay" src="images/play.png" title="run"></a>
+  </div>
+  <div class="morebuttons">
+    <a href ="javascript:resetChip()"><img class="navbutton" src="images/up.png" title="reset"></a>
+    <a href ="javascript:stepBack()"><img class="navbutton" src="images/prev.png" title="back"></a>
+    <a href ="javascript:stepForward()"><img class="navbutton" src="images/next.png" title="forward"></a>
+    <a href ="javascript:goUntilSyncOrWrite()"><img class="navbutton" src="images/singlestep.png" title="step"></a>
+    <a href ="javascript:goFor()"><img class="navbutton" src="images/fastforward.png" title="fastforward"></a>
+  </div>
+  <div style="float:right;">
+    <a href="http://visual6502.org/wiki/index.php?title=JssimUserHelp" target="_blank">User Guide</a>
+    &nbsp;
+  </div>
+</div>  <!-- buttons -->
+<div class="status" id="status"><p>x: 0<br>y: 0</p>
+</div> <!-- status -->
+
+   <div id="memtablediv">
+	<table class="memtable" id="memtable" tabindex="2"></table>
+   </div>
+</div> <!-- righttopdiv -->
+
+   <div id="tracingdiv">
+        <textarea id="consolebox">
+click here and type if your program handles input
+        </textarea>
+	<div id="expertControlPanel" tabindex="3">
+	  <form action="javascript:updateLogList()">
+	  <input type="button" value="Trace more" onclick="updateLoglevel(++loglevel)" />
+	  <input type="button" value="Trace less" onclick="updateLoglevel(--loglevel)" />
+	  <input type="button" value="Trace these too:" onclick="updateLogList()" />
+            <input type="text" id="LogThese" name="LogThese" value="" />
+	  <input type="button" value="Log Up/Down" onclick="updateLogDirection();" />
+	  <input type="button" value="Clear Log" onclick="updateLoglevel(loglevel)" />
+	  </form>
+	  <br />
+	</div>
+	<div id="logstreamscroller">
+	       <table class="logstream" id="logstream"></table>
+	</div>
+   </div>
+</div> <!-- closing rightcolumn -->
+</div> <!-- closing 'frame' div -->
+</body>
+</html>

expert-z80.html

@@ -0,0 +1,151 @@
+<!DOCTYPE html>
+
+<head>
+<title>Visual Z80 in JavaScript</title>
+<style type="text/css">@import "expert.css";</style>
+<script src="chip-z80/segdefs.js"></script>
+<script src="chip-z80/transdefs.js"></script>
+<script src="chip-z80/nodenames.js"></script>
+<script src="wires.js"></script>
+<script src="expertWires.js"></script>
+<script src="chipsim.js"></script>
+<script src="memtable.js"></script>
+<script src="macros.js"></script>
+<script src="chip-z80/support.js"></script>
+<script src="chip-z80/testprogram.js"></script>
+<script src="3rdparty/jquery-1.3.2.min.js"></script>
+<script src="3rdparty/jquery.cookie.js"></script>
+<script src="3rdparty/splitter.js"></script>
+
+<script type="text/javascript">
+function handleOnload() {
+	/MSIE (\d+\.\d+);/.test(navigator.appVersion);
+	IEVersion=Number(RegExp.$1);
+	if((navigator.appName == 'Microsoft Internet Explorer') && (IEVersion<9)){
+		document.getElementById('browsertrouble').innerHTML=
+			'<p>Sorry, '+navigator.appName+' not supported - showing you a picture instead!</p>';
+		document.getElementById('frame').innerHTML='<a href="browsertrouble.html"><img src="images/jssim2.png" style="border:10px"></a>';
+	}else{
+		setTimeout(setup,200);
+	}
+};
+
+// initialise splitter (built on jquery)
+$().ready(function(){
+	$("#frame").splitter({
+		type: "v",
+		outline: true,
+		minLeft: 20,
+		sizeLeft: 810,
+		resizeToWidth: true,
+		anchorToWindow: true,
+	});
+	$("#rightcolumn").splitter({
+		type: "h",
+		outline: true,
+		sizeBottom: 180,
+		minTop: 100,
+	});
+});
+</script>
+
+</head>
+
+<body onload="handleOnload();">
+<span id="plain">
+<a href="http://www.visual6502.org/faq.html">FAQ</a>&nbsp;
+<a href="http://blog.visual6502.org">Blog</a>&nbsp;
+<a href="http://www.visual6502.org/links.html">Links</a>&nbsp;
+<a href="http://github.com/trebonian/visual6502">Source</a>&nbsp;
+</span>
+<div class="frame" id="frame">
+<div class="leftcolumn" id="leftcolumn">
+<div id="chipsurround" tabindex="1">
+<div class="chip" id="chip">
+<span id="waiting">Please wait, graphics initialising...</span>
+<canvas class="chip" id="chipbg"></canvas>
+<canvas class="chip" id="overlay"></canvas>
+<canvas class="chip" id="hilite"></canvas>
+<canvas class="chip" id="hitbuffer"></canvas>
+</div>
+</div> <!-- chipsurround -->
+<div class="nochip" id="nochip">
+  <form>
+  <input type="button" value="Show chip layout" onclick="updateChipLayoutVisibility(true)" />
+  </form>
+</div>
+<div id="layoutControlPanel">
+  Use 'z' or '>' to zoom in, 'x' or '<' to zoom out, click to probe signals and drag to pan.
+  <form id="updateShow"> Show:
+  <input type="checkbox" name="1" id="updateShow1" onchange="updateShow(this.name,this.checked)" />(diffusion)
+  <input type="checkbox" name="3" id="updateShow3" onchange="updateShow(this.name,this.checked)" />(grounded diffusion)
+  <input type="checkbox" name="4" id="updateShow4" onchange="updateShow(this.name,this.checked)" />(powered diffusion)
+  <input type="checkbox" name="5" id="updateShow5" onchange="updateShow(this.name,this.checked)" />(polysilicon)
+  <input type="checkbox" name="0" id="updateShow0" onchange="updateShow(this.name,this.checked)" />(metal)
+  <input type="checkbox" name="2" id="updateShow2" onchange="updateShow(this.name,this.checked)" />(protection)
+  </form>
+  <form action="javascript:hiliteNodeList();">
+  <input type="button" value="Find:" onclick="hiliteNodeList();" />
+  <input type="text" id="HighlightThese" name="HighlightThese" value="" />
+  <input type="button" value="Clear Highlighting" onclick="clearHighlight();" />
+  <span class="animatebox">
+    Animate during simulation:
+    <input type="checkbox" id="animateModeCheckbox" onchange="updateChipLayoutAnimation(this.checked)" 
+    /></span>
+  </form>
+  <form>
+  <input type="button" value="Hide Chip Layout" onclick="updateChipLayoutVisibility(false)" />
+  <a href="" id="linkHere" >Link to this location</a>
+  </form>
+</div>
+</div> <!-- closing leftcolumn -->
+<div class="rightcolumn" id="rightcolumn">
+<div id="righttopdiv">
+<div class = "buttons">
+  <div class="twobuttons">
+    <a href ="javascript:stopChip()" id="stop"><img class="navstop" src="images/stop.png" title="stop"></a>
+    <a href ="javascript:runChip()"  id="start"><img class="navplay" src="images/play.png" title="run"></a>
+  </div>
+  <div class="morebuttons">
+    <a href ="javascript:resetChip()"><img class="navbutton" src="images/up.png" title="reset"></a>
+    <a href ="javascript:stepBack()"><img class="navbutton" src="images/prev.png" title="back"></a>
+    <a href ="javascript:stepForward()"><img class="navbutton" src="images/next.png" title="forward"></a>
+    <a href ="javascript:goUntilSyncOrWrite()"><img class="navbutton" src="images/singlestep.png" title="step"></a>
+    <a href ="javascript:goFor()"><img class="navbutton" src="images/fastforward.png" title="fastforward"></a>
+  </div>
+  <div style="float:right;">
+    <a href="http://visual6502.org/wiki/index.php?title=JssimUserHelp" target="_blank">User Guide</a>
+    &nbsp;
+  </div>
+</div>  <!-- buttons -->
+<div class="status" id="status"><p>x: 0<br>y: 0</p>
+</div> <!-- status -->
+
+   <div id="memtablediv">
+	<table class="memtable" id="memtable" tabindex="2"></table>
+   </div>
+</div> <!-- righttopdiv -->
+
+   <div id="tracingdiv">
+        <textarea id="consolebox">
+click here and type if your program handles input
+        </textarea>
+	<div id="expertControlPanel" tabindex="3">
+	  <form action="javascript:updateLogList()">
+	  <input type="button" value="Trace more" onclick="updateLoglevel(++loglevel)" />
+	  <input type="button" value="Trace less" onclick="updateLoglevel(--loglevel)" />
+	  <input type="button" value="Trace these too:" onclick="updateLogList()" />
+            <input type="text" id="LogThese" name="LogThese" value="" />
+	  <input type="button" value="Log Up/Down" onclick="updateLogDirection();" />
+	  <input type="button" value="Clear Log" onclick="updateLoglevel(loglevel)" />
+	  </form>
+	  <br />
+	</div>
+	<div id="logstreamscroller">
+	       <table class="logstream" id="logstream"></table>
+	</div>
+   </div>
+</div> <!-- closing rightcolumn -->
+</div> <!-- closing 'frame' div -->
+</body>
+</html>

expert.css

@@ -0,0 +1,228 @@
+/*
+ Copyright (c) 2010 Brian Silverman, Barry Silverman, Ed Spittles
+
+ Permission is hereby granted, free of charge, to any person obtaining a copy
+ of this software and associated documentation files (the "Software"), to deal
+ in the Software without restriction, including without limitation the rights
+ to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ copies of the Software, and to permit persons to whom the Software is
+ furnished to do so, subject to the following conditions:
+
+ The above copyright notice and this permission notice shall be included in
+ all copies or substantial portions of the Software.
+
+ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ THE SOFTWARE.
+*/
+
+body {
+ background: white;
+ color: black;
+ font-family :Verdana, Arial, Helvetica, Sans-Serif;
+ font-size: 12px;
+}
+
+#title {
+ font-size: 30px;
+ font-weight: bold;
+}
+
+div.frame {
+ margin-left: 10px;
+ min-width: 1120px;  /* ugh - prevent memtable flowing underneath chip */
+}
+
+div.leftcolumn {
+ width: 804px;       /* ugh - matches the div.chip width + border */
+}
+
+div.rightcolumn {
+ padding-left: 8px;
+}
+
+div.footer {
+ clear: both;
+ padding-top: 10px;
+}
+
+div.nochip {
+ display:none;
+}
+
+div#chipsurround {
+ height: 600px;      /* matches the div.chip height */
+}
+
+div.chip {
+ background: lightgray;
+ border: 2px solid gray;
+ position: absolute; /* must be absolute to contain the canvas */
+ width: 800px;
+ height: 600px;
+ overflow: hidden;
+}
+
+canvas.chip {
+ position: absolute;
+ width: 600px;       /* square chip image same height as div.chip */
+ height: 600px;      /* square */
+}
+
+div.twobuttons{
+ float:left;
+}
+
+div.morebuttons{
+ float:left;
+}
+
+div.buttons{
+ /* top: -5px; */
+}
+
+div.status {
+ clear: left;
+ padding-top: 10px;
+ padding-bottom: 10px;
+ font-family: monospace;
+ font-size: 12px;
+}
+
+img.navbutton {
+ border: 0px;
+}
+
+img.navplay {
+ margin-right: 5px;
+ border: 0px;
+}
+
+img.navstop {
+ position: absolute;
+ border: 0px;
+}
+
+span.expertcheckbox {
+ margin-left: 20px;
+}
+
+table.memtable {
+ font-family: monospace;
+ font-size: 12px;
+ border-spacing: 0px;
+ overflow: auto;
+}
+
+div#layoutControlPanel{
+ display:none;
+ margin-top: 2px;
+ margin-bottom: 2px;
+}
+
+div#expertControlPanel{
+ display:none;
+}
+
+span.animatebox{
+ border:thin solid;
+ padding:2px;
+ border-color:gray;
+}
+
+a#linkHere{
+ padding:2px;
+}
+
+textarea#consolebox{
+ font-family:courier,monospace;
+ border: 1px solid gray;
+ margin: 2px;
+ padding: 2px;
+ width: 80em;
+}
+
+div#logstreamscroller{
+ overflow:auto;
+}
+
+table.logstream {
+ font-family: monospace;
+ font-size: 12px;
+ border-collapse: collapse;
+ text-align:center;
+}
+
+td {
+ padding-left: 3px;
+ padding-right: 3px;
+}
+
+td.header {
+ background-color: rgb(187, 204, 255);  /* medium-dark blue */
+}
+
+td.oddcol {
+ background-color: rgb(227, 233, 255);  /* light blue */
+}
+
+td.oddrow {
+ background-color: rgb(207, 218, 255);  /* medium blue */
+}
+
+td.oddrowcol {
+ background-color: rgb(227, 233, 255);  /* light blue */
+}
+
+/* Splitter */
+#frame {
+ height: 750px;
+}
+
+div.leftcolumn, div.rightcolumn, {
+ overflow: auto;
+}
+
+div#righttopdiv, div#tracingdiv {
+ overflow: auto;
+ background-color: white;
+}
+
+div.rightcolumn {
+ background-color: white;
+}
+
+.vsplitbar {
+ width: 5px;
+ background: #aaa;
+}
+
+.vsplitbar {
+ width: 6px;
+ background: #669 url(3rdparty/img/vgrabber.gif) no-repeat center;
+}
+
+.vsplitbar:hover, .vsplitbar.active {
+ background: #c66 url(3rdparty/img/vgrabber.gif) no-repeat center;
+ opacity: 0.7;
+ filter: alpha(opacity=70); /* IE */
+ background: #c99;
+}
+
+.hsplitbar {
+ height: 6px;
+ background: #669 url(3rdparty/img/hgrabber.gif) no-repeat center;
+}
+
+.hsplitbar.active, .hsplitbar:hover {
+ background: #c66 url(3rdparty/img/hgrabber.gif) no-repeat center;
+}
+
+span#plain {
+ display: block;
+ margin-bottom: 4px;
+}

expert.html

@@ -0,0 +1,152 @@
+<!DOCTYPE html>
+
+<head>
+<title>Visual 6502 in JavaScript</title>
+<style type="text/css">@import "expert.css";</style>
+<script src="segdefs.js"></script>
+<script src="transdefs.js"></script>
+<script src="nodenames.js"></script>
+<script src="wires.js"></script>
+<script src="expertWires.js"></script>
+<script src="chipsim.js"></script>
+<script src="memtable.js"></script>
+<script src="macros.js"></script>
+<script src="testprogram.js"></script>
+<script src="3rdparty/jquery-1.3.2.min.js"></script>
+<script src="3rdparty/jquery.cookie.js"></script>
+<script src="3rdparty/splitter.js"></script>
+
+<script type="text/javascript">
+function handleOnload() {
+	/MSIE (\d+\.\d+);/.test(navigator.appVersion);
+	IEVersion=Number(RegExp.$1);
+	if((navigator.appName == 'Microsoft Internet Explorer') && (IEVersion<9)){
+		document.getElementById('browsertrouble').innerHTML=
+			'<p>Sorry, '+navigator.appName+' not supported - showing you a picture instead!</p>';
+		document.getElementById('frame').innerHTML='<a href="browsertrouble.html"><img src="images/jssim2.png" style="border:10px"></a>';
+	}else{
+		setTimeout(setup,200);
+	}
+};
+
+// initialise splitter (built on jquery)
+$().ready(function(){
+	$("#frame").splitter({
+		type: "v",
+		outline: true,
+		minLeft: 20,
+		sizeLeft: 810,
+		resizeToWidth: true,
+		anchorToWindow: true,
+	});
+	$("#rightcolumn").splitter({
+		type: "h",
+		outline: true,
+		sizeBottom: 180,
+		minTop: 100,
+	});
+});
+</script>
+
+</head>
+
+<body onload="handleOnload();">
+<span id="plain">
+<a href="http://www.visual6502.org/faq.html">FAQ</a>&nbsp;
+<a href="http://blog.visual6502.org">Blog</a>&nbsp;
+<a href="http://www.visual6502.org/links.html">Links</a>&nbsp;
+<a href="http://github.com/trebonian/visual6502">Source</a>&nbsp;
+<a href="http://skilldrick.github.io/easy6502/#first-program">easy6502 assembler</a>&nbsp;
+<a href="http://www.masswerk.at/6502/disassembler.html">mass:werk disassembler</a>&nbsp;
+</span>
+<div class="frame" id="frame">
+<div class="leftcolumn" id="leftcolumn">
+<div id="chipsurround" tabindex="1">
+<div class="chip" id="chip">
+<span id="waiting">Please wait, graphics initialising...</span>
+<canvas class="chip" id="chipbg"></canvas>
+<canvas class="chip" id="overlay"></canvas>
+<canvas class="chip" id="hilite"></canvas>
+<canvas class="chip" id="hitbuffer"></canvas>
+</div>
+</div> <!-- chipsurround -->
+<div class="nochip" id="nochip">
+  <form>
+  <input type="button" value="Show chip layout" onclick="updateChipLayoutVisibility(true)" />
+  </form>
+</div>
+<div id="layoutControlPanel">
+  Use 'z' or '&gt;' to zoom in, 'x' or '&lt;' to zoom out, click to probe signals and drag to pan.
+  <form id="updateShow"> Show:
+  <input type="checkbox" name="1" id="updateShow1" onchange="updateShow(this.name,this.checked)" /><label for="updateShow1">(diffusion)</label>
+  <input type="checkbox" name="3" id="updateShow3" onchange="updateShow(this.name,this.checked)" /><label for="updateShow3">(grounded diffusion)</label>
+  <input type="checkbox" name="4" id="updateShow4" onchange="updateShow(this.name,this.checked)" /><label for="updateShow4">(powered diffusion)</label>
+  <input type="checkbox" name="5" id="updateShow5" onchange="updateShow(this.name,this.checked)" /><label for="updateShow5">(polysilicon)</label>
+  <input type="checkbox" name="0" id="updateShow0" onchange="updateShow(this.name,this.checked)" /><label for="updateShow0">(metal)</label>
+  <input type="checkbox" name="2" id="updateShow2" onchange="updateShow(this.name,this.checked)" /><label for="updateShow2">(protection)</label>
+  </form>
+  <form action="javascript:hiliteNodeList();">
+  <input type="button" value="Find:" onclick="hiliteNodeList();" />
+  <input type="text" id="HighlightThese" name="HighlightThese" value="" />
+  <input type="button" value="Clear Highlighting" onclick="clearHighlight();" />
+  <span class="animatebox">
+    <label for="animateModeCheckbox">Animate during simulation:</label>
+    <input type="checkbox" id="animateModeCheckbox" onchange="updateChipLayoutAnimation(this.checked)" 
+    /></span>
+  </form>
+  <form>
+  <input type="button" value="Hide Chip Layout" onclick="updateChipLayoutVisibility(false)" />
+  <a href="" id="linkHere" >Link to this location</a>
+  </form>
+</div>
+</div> <!-- closing leftcolumn -->
+<div class="rightcolumn" id="rightcolumn">
+<div id="righttopdiv">
+<div class = "buttons">
+  <div class="twobuttons">
+    <a href ="javascript:stopChip()" id="stop"><img class="navstop" src="images/stop.png" title="stop"></a>
+    <a href ="javascript:runChip()"  id="start"><img class="navplay" src="images/play.png" title="run"></a>
+  </div>
+  <div class="morebuttons">
+    <a href ="javascript:resetChip()"><img class="navbutton" src="images/up.png" title="reset"></a>
+    <a href ="javascript:stepBack()"><img class="navbutton" src="images/prev.png" title="back"></a>
+    <a href ="javascript:stepForward()"><img class="navbutton" src="images/next.png" title="forward"></a>
+    <a href ="javascript:goUntilSyncOrWrite()"><img class="navbutton" src="images/singlestep.png" title="step"></a>
+    <a href ="javascript:goFor()"><img class="navbutton" src="images/fastforward.png" title="fastforward"></a>
+  </div>
+  <div style="float:right;">
+    <a href="https://web.archive.org/web/20210608195625/http://visual6502.org/wiki/index.php?title=JssimUserHelp" target="_blank">User Guide</a>
+    &nbsp;
+  </div>
+</div>  <!-- buttons -->
+<div class="status" id="status"><p>x: 0<br>y: 0</p>
+</div> <!-- status -->
+
+   <div id="memtablediv">
+	<table class="memtable" id="memtable" tabindex="2"></table>
+   </div>
+</div> <!-- righttopdiv -->
+
+   <div id="tracingdiv">
+        <textarea id="consolebox">
+click here and type if your program handles input
+        </textarea>
+	<div id="expertControlPanel" tabindex="3">
+	  <form action="javascript:updateLogList()">
+	  <input type="button" value="Trace more" onclick="updateLoglevel(++loglevel)" />
+	  <input type="button" value="Trace less" onclick="updateLoglevel(--loglevel)" />
+	  <input type="button" value="Trace these too:" onclick="updateLogList()" />
+            <input type="text" id="LogThese" name="LogThese" value="" />
+	  <input type="button" value="Log Up/Down" onclick="updateLogDirection();" />
+	  <input type="button" value="Clear Log" onclick="updateLoglevel(loglevel)" />
+	  </form>
+	  <br />
+	</div>
+	<div id="logstreamscroller">
+	       <table class="logstream" id="logstream"></table>
+	</div>
+   </div>
+</div> <!-- closing rightcolumn -->
+</div> <!-- closing 'frame' div -->
+</body>
+</html>

expertWires.js

@@ -0,0 +1,646 @@
+/*
+ Copyright (c) 2010 Brian Silverman, Barry Silverman, Ed Spittles
+
+ Permission is hereby granted, free of charge, to any person obtaining a copy
+ of this software and associated documentation files (the "Software"), to deal
+ in the Software without restriction, including without limitation the rights
+ to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ copies of the Software, and to permit persons to whom the Software is
+ furnished to do so, subject to the following conditions:
+
+ The above copyright notice and this permission notice shall be included in
+ all copies or substantial portions of the Software.
+
+ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ THE SOFTWARE.
+*/
+
+var centerx=300, centery=300;
+var zoom=1;
+var dragMouseX, dragMouseY, moved;
+var statbox;
+var findThese;
+var labelThese=[];
+
+// Some constants for the graphics presentation
+// the canvas is embedded in an 800x600 clipping div
+//   which gives rise to some of the 300 and 400 values in the code
+//   there are also some 600 values
+// the 6502D chip coords are in the box (216,179) to (8983,9807)
+// we have 4 canvases all the same size, now 2000 pixels square
+//   chip background - the layout
+//   overlay - a red/white transparency to show logic high or low
+//   hilite - to show the selected polygon
+//   hitbuffer - abusing color values to return which polygon is under a point
+// we no longer use a scaling transform - we now scale the chip data at
+//   the point of drawing line segments
+// if the canvas is any smaller than chip coordinates there will be
+//   rounding artifacts, and at high zoom there will be anti-aliasing on edges.
+var grMaxZoom=12;
+var grChipSize=10000;
+var grChipOffsetX=400;
+var grChipOffsetY=0;
+var grCanvasSize=2000;
+var grLineWidth=1;
+
+// Index of layerNames corresponds to index into drawLayers
+var layernames = ['metal', 'switched diffusion', 'inputdiode', 'grounded diffusion', 'powered diffusion', 'polysilicon'];
+var colors = ['rgba(128,128,192,0.4)','#FFFF00','#FF00FF','#4DFF4D',
+              '#FF4D4D','#801AC0','rgba(128,0,255,0.75)'];
+var drawlayers = [true, true, true, true, true, true];
+
+// some modes and parameters which can be passed in from the URL query
+var moveHereFirst;
+var expertMode=true;
+var animateChipLayout = true;
+var userCode=[];
+var userResetLow;
+var userResetHigh;
+var headlessSteps=1000;
+var noSimulation=false;
+var testprogram=[];
+var testprogramAddress;
+
+/////////////////////////
+//
+// Drawing Setup
+//
+/////////////////////////
+
+// try to present a meaningful page before starting expensive work
+function setup(){
+	statbox = document.getElementById('status');
+	setStatus('loading 6502...');
+	setTimeout(setup_part2, 0);
+}
+
+function setup_part2(){
+	frame = document.getElementById('frame');
+	statbox = document.getElementById('status');
+	// load the circuit before acting on URL parameters
+	setupNodes();
+	setupTransistors();
+	setupParams();
+	setupExpertMode();
+	detectOldBrowser();
+	setStatus('loading graphics...');
+	setTimeout(setup_part3, 0);
+}
+
+function setup_part3(){
+	if(chipLayoutIsVisible){
+		// if user requests no chip layout, we can skip all canvas operations
+		// which saves a lot of memory and allows us to run on small systems
+		updateChipLayoutVisibility(true);
+	}
+	setStatus('resetting ' + chipname + '...');
+	setTimeout(setup_part4, 0);
+}
+
+function setup_part4(){
+	setupTable();
+	setupNodeNameList();
+	logThese=signalSet(loglevel);
+	loadProgram();
+	setupConsole();
+	if(noSimulation){
+		stopChip();
+		running=undefined;
+		setStatus('Ready!');
+	} else {
+		initChip();
+		document.getElementById('stop').style.visibility = 'hidden';
+		go();
+	}
+}
+
+function detectOldBrowser(){
+	if(!("getBoundingClientRect" in document.documentElement)){
+		// simplify these functions (and adjust layout window position)
+		localx=	function(el, gx){
+				return gx-el.offsetLeft;
+			}
+		localy=	function(el, gy){
+				return gy-el.offsetTop;
+			}
+		document.getElementById('plain').style["float"]="right";
+		document.getElementById('chip').style.left=0;
+		document.getElementById('chip').style.top=0;
+		document.getElementById('chip').style.border=0;
+	}
+}
+
+function setupParams(){
+	if(location.search=="")
+		return
+	var queryParts=location.search.slice(1).split('&');
+	var panx;
+	var pany;
+	var zoom;
+	var userAddress;
+	for(var i=0;i<queryParts.length;i++){
+		var params=queryParts[i].split("=");
+		if(params.length!=2){
+			if(loglevel>0)
+				console.log('malformed parameters',params);
+			break;
+		}
+		var name=params[0];
+		var value=params[1].replace(/\/$/,""); // chrome sometimes adds trailing slash
+		// be (relatively) forgiving in what we accept
+		//
+		// user interface mode control
+		if(name=="loglevel" && parseInt(value)!=NaN){
+			updateLoglevel(value);
+		} else if(name=="logmore" && value!=""){
+			updateLogList(value);
+		} else if(name=="headlesssteps" && parseInt(value)!=NaN){
+			headlessSteps=parseInt(value);
+		} else if(name=="graphics" && value.indexOf("f")==0){
+			updateChipLayoutVisibility(false);
+		} else if(name=="canvas" && parseInt(value)!=NaN){
+			grCanvasSize=value;
+		// suppress simulation (for layout viewing only on slow browsers)
+		} else if(name=="nosim" && value.indexOf("t")==0){
+			noSimulation=true;
+		} else
+		// place the graphics window at a point of interest
+		if(name=="panx" && parseInt(value)!=NaN){
+			panx=parseInt(value);
+		} else if(name=="pany" && parseInt(value)!=NaN){
+			pany=parseInt(value);
+		} else if(name=="zoom" && parseInt(value)!=NaN){
+			zoom=parseInt(value);
+		} else
+		// perform a search, highlight and zoom to object(s)
+		if(name=="find" && value.length>0){
+			findThese=value;
+		} else
+		// affix label with optional box to highlight an area of interest
+		if(name=="label" && value.length>0){
+			labelThese.push(value.split(","));
+		} else
+		// load a test program: Address, Data and Reset
+		if(name=="a" && parseInt(value,16)!=NaN){
+			userAddress=parseInt(value,16);
+		} else if(name=="d" && value.match(/[0-9a-fA-F]*/)[0].length==value.length){
+			for(var j=0;j<value.length;j+=2)
+				userCode[userAddress++]=parseInt(value.slice(j,j+2),16);
+		} else if(name=="r" && parseInt(value,16)!=NaN){
+			userResetLow=parseInt(value,16)%256;
+			userResetHigh=(parseInt(value,16)>>8)%256;
+		} else
+		// setup input pin events, breakpoints, watchpoints
+		if(name=="reset0" && parseInt(value)!=NaN){
+			clockTriggers[value]=[clockTriggers[value],"setLow(nodenamereset);"].join("");
+		} else if(name=="reset1" && parseInt(value)!=NaN){
+			clockTriggers[value]=[clockTriggers[value],"setHigh(nodenamereset);"].join("");
+		} else if(name=="irq0" && parseInt(value)!=NaN){
+			clockTriggers[value]=[clockTriggers[value],"setLow('irq');"].join("");
+		} else if(name=="irq1" && parseInt(value)!=NaN){
+			clockTriggers[value]=[clockTriggers[value],"setHigh('irq');"].join("");
+		} else if(name=="nmi0" && parseInt(value)!=NaN){
+			clockTriggers[value]=[clockTriggers[value],"setLow('nmi');"].join("");
+		} else if(name=="nmi1" && parseInt(value)!=NaN){
+			clockTriggers[value]=[clockTriggers[value],"setHigh('nmi');"].join("");
+		} else if(name=="rdy0" && parseInt(value)!=NaN){
+			clockTriggers[value]=[clockTriggers[value],"setLow('rdy');"].join("");
+		} else if(name=="rdy1" && parseInt(value)!=NaN){
+			clockTriggers[value]=[clockTriggers[value],"setHigh('rdy');"].join("");
+		} else if(name=="so0" && parseInt(value)!=NaN){
+			clockTriggers[value]=[clockTriggers[value],"setLow('so');"].join("");
+		} else if(name=="so1" && parseInt(value)!=NaN){
+			clockTriggers[value]=[clockTriggers[value],"setHigh('so');"].join("");
+		// Some Z80 inputs - we can refactor if this becomes unwieldy
+		} else if(name=="int0" && parseInt(value)!=NaN){
+			clockTriggers[value]=[clockTriggers[value],"setLow('int');"].join("");
+		} else if(name=="int1" && parseInt(value)!=NaN){
+			clockTriggers[value]=[clockTriggers[value],"setHigh('int');"].join("");
+		} else if(name=="wait0" && parseInt(value)!=NaN){
+			clockTriggers[value]=[clockTriggers[value],"setLow('wait');"].join("");
+		} else if(name=="wait1" && parseInt(value)!=NaN){
+			clockTriggers[value]=[clockTriggers[value],"setHigh('wait');"].join("");
+		} else if(name=="busrq0" && parseInt(value)!=NaN){
+			clockTriggers[value]=[clockTriggers[value],"setLow('busrq');"].join("");
+		} else if(name=="busrq1" && parseInt(value)!=NaN){
+			clockTriggers[value]=[clockTriggers[value],"setHigh('busrq');"].join("");
+		//
+		} else if(name=="time" && parseInt(value)!=NaN){
+			eventTime=value;
+		} else if(name=="databus" && parseInt(value)!=NaN){
+			clockTriggers[eventTime]=[clockTriggers[eventTime],"writeDataBus(0x"+value+");"].join("");
+		} else
+		// run a test program, and optionally check against a golden checksum
+		if(name=="steps" && parseInt(value)!=NaN){
+			userSteps=parseInt(value);
+			running=true;
+		} else if(name=="checksum" && parseInt(value,16)!=NaN){
+			goldenChecksum=(0x100000000+parseInt(value,16)).toString(16).slice(-8);
+		} else {
+			if(loglevel>0)
+				console.log('unrecognised parameters:',params);
+			break;
+		}
+	}
+	if(panx!=null && pany!=null && zoom!=null)
+		moveHereFirst=[panx,pany,zoom];
+}
+
+function updateChipLayoutAnimation(isOn){
+	// simulation is much faster if we don't update the chip layout on every step
+	animateChipLayout=isOn;
+	document.getElementById('animateModeCheckbox').checked = animateChipLayout;
+}
+
+/////////////////////////
+//
+// User Interface
+//
+/////////////////////////
+
+
+// these keyboard actions are primarily for the chip display
+function handleKey(e){
+	var c = e.charCode || e.keyCode;
+	c = String.fromCharCode(c);
+	if('<>?npZzx'.indexOf(c)==-1) return;
+	if((c=='Z'||c=='x'||c=='<') && zoom>1) setZoom(zoom/1.2);
+	else if((c=='z'||c=='>') && zoom<grMaxZoom) setZoom(zoom*1.2);
+	else if(c=='?') setZoom(1);
+	// FIXME these keys are for the simulator (but not when focus is in a textbox)
+	else if(c=='n') stepForward();
+	else if(c=='p') stepBack();
+}
+
+//  handler for zoom in/out using the mouse wheel
+function handleWheelZoom(e){
+	chipsurround.focus();
+	e.preventDefault();
+	var n = e.deltaY / 100;
+	if(n>0 && zoom>1) setZoom(zoom/1.2);
+	if(n<0 && zoom<grMaxZoom) setZoom(zoom*1.2);
+}
+
+//  handler for mousedown events over chip display
+//  must handle click-to-select (and focus), and drag to pan
+function mouseDown(e){
+	chipsurround.focus();
+	e.preventDefault();
+	moved=false;
+	dragMouseX = e.clientX;
+	dragMouseY = e.clientY;
+	chipsurround.onmousemove = function(e){mouseMove(e)};
+	chipsurround.onmouseup = function(e){mouseUp(e)};
+}
+
+function mouseMove(e){
+	moved = true;
+	if(zoom==1) return;
+	var dx = e.clientX-dragMouseX;
+	var dy = e.clientY-dragMouseY;
+	dragMouseX = e.clientX;
+	dragMouseY = e.clientY;
+	centerx-=dx/zoom;
+	centerx = Math.max(centerx, 400/zoom);
+	centerx = Math.min(centerx, 600-400/zoom);
+	centery-=dy/zoom;
+	centery = Math.max(centery, 300/zoom);
+	centery = Math.min(centery, 600-300/zoom);
+	recenter();
+}
+
+function mouseUp(e){
+	if(!moved) handleClick(e);
+	chipsurround.onmousemove = undefined;
+	chipsurround.onmouseup = undefined;
+}
+
+function setZoom(n){
+	zoom = n;
+	setChipStyle({
+		width: 600*n+'px',
+		height: 600*n+'px'
+	});
+	recenter();
+}
+
+function recenter(){
+	var top = -centery*zoom+300;
+	top = Math.min(top, 0);
+	top = Math.max(top, -600*(zoom-1));
+	var left = -centerx*zoom+400;
+	left = Math.min(left, 0);
+	left = Math.max(left, (zoom==1)?100:-600*zoom+800);
+	setChipStyle({
+		top: top+'px',
+		left: left+'px',
+	});
+	updateLinkHere();
+}
+
+function updateLinkHere(){
+	var target = location.pathname + "?nosim=t&";
+	var findlist = document.getElementById('HighlightThese').value.split(/[\s,]+/).join(",");
+	if (findlist != "")
+		target = target + "find=" + findlist + "&";
+	target = target + whereAmIAsQuery();
+	document.getElementById('linkHere').href=target;
+}
+
+// place a text label on the highlight layer
+// with an optional box around an area of interest
+// coordinates used are those reported by a click
+// for example:
+//   boxLabel(['PD',   50, 8424, 3536, 9256, 2464])
+//   boxLabel(['IR',   50, 8432, 2332, 9124,  984])
+//   boxLabel(['PLA', 100, 1169, 2328, 8393,  934])
+//   boxLabel(['Y',    50, 2143, 8820, 2317, 5689])
+//   boxLabel(['X',    50, 2317, 8820, 2490, 5689])
+//   boxLabel(['S',    50, 2490, 8820, 2814, 5689])
+//   boxLabel(['ALU',  50, 2814, 8820, 4525, 5689])
+//   boxLabel(['DAdj', 40, 4525, 8820, 5040, 5689])
+//   boxLabel(['A',    50, 5040, 8820, 5328, 5689])
+//   boxLabel(['PC',   50, 5559, 8820, 6819, 5689])
+//   boxLabel(['ID',   50, 7365, 8820, 7676, 5689])
+//   boxLabel(['TimC', 40,  600, 1926, 1174,  604])
+
+function flashBoxLabel(args) {
+	clearHighlight();
+	var callBack = function(){boxLabel(args);};
+	setTimeout(callBack, 400);
+	setTimeout(clearHighlight,  800);
+	setTimeout(callBack, 1200);
+}
+
+function boxLabel(args) {
+	var text = args[0];
+	var textsize = args[1];
+	var thickness = 1+ textsize / 20;
+	var boxXmin = args[2] * grCanvasSize / grChipSize;
+	var boxYmin = args[3] * grCanvasSize / grChipSize;
+	var boxXmax = args[4] * grCanvasSize / grChipSize;
+	var boxYmax = args[5] * grCanvasSize / grChipSize;
+	ctx.lineWidth   = thickness;
+	ctx.font        = textsize + 'px sans-serif';
+	ctx.fillStyle   = '#ff0';  // yellow
+	ctx.fillStyle   = '#f8f';  // magenta
+	ctx.fillStyle   = '#fff';  // white
+	ctx.strokeStyle = '#fff';  // white
+	if(args.length>4){
+		ctxDrawBox(ctx, boxXmin, boxYmin, boxXmax, boxYmax);
+		// offset the text label to the interior of the box
+		boxYmin -= thickness * 2;
+	}
+	ctx.strokeStyle = '#fff';  // white
+	ctx.strokeStyle = '#000';  // black
+	ctx.lineWidth   = thickness*2;
+	ctx.strokeText(text, boxXmin, boxYmin);
+	ctx.fillText(text, boxXmin, boxYmin);
+}
+
+var highlightThese;
+
+// flash some set of nodes according to user input
+// also zoom to fit those nodes (not presently optional)
+function hiliteNodeList(){
+	var tmplist = document.getElementById('HighlightThese').value.split(/[\s,]+/);
+	if(tmplist.join("").length==0){
+		// request to highlight nothing, so switch off any signal highlighting
+		hiliteNode(-1);
+		return;
+	}
+	highlightThese = [];
+	var seglist=[];
+	var report="";
+	for(var i=0;i<tmplist.length;i++){
+		// get a node number from a signal name or a node number
+		var name = tmplist[i];
+		var value = parseInt(tmplist[i]);
+		if((value!=NaN) && (typeof nodes[value] != "undefined")) {
+			highlightThese.push(value);
+			report="node: " + value + ' ' + nodeName(value);
+			for(var s in nodes[value].segs)
+				seglist.push(nodes[value].segs[s]);
+		} else if(typeof nodenames[name] != "undefined") {
+			highlightThese.push(nodenames[name]);
+			report="node: " + nodenames[name] + ' ' + name;
+			for(var s in nodes[nodenames[name]].segs)
+				seglist.push(nodes[nodenames[name]].segs[s]);
+		} else if(typeof transistors[name] != "undefined") {
+			// normally we push numbers: a non-number is a transistor name
+			highlightThese.push(name);
+			report="transistor: " + name;
+			seglist.push([
+				transistors[name].bb[0],transistors[name].bb[2],
+				transistors[name].bb[1],transistors[name].bb[3]
+			]);
+		} else {
+			// allow match of underscore-delimited components, so
+			// SUMS and dpc17 both match the node dpc17_SUMS
+			for(var i in nodenames){
+				re=new RegExp("(^" + name + "_|_" + name + "$)");
+				if (re.test(i)){
+					value = nodenames[i];
+					highlightThese.push(value);
+					report="node: " + value + ' ' + nodeName(value);
+					for(var s in nodes[value].segs)
+						seglist.push(nodes[value].segs[s]);
+					break;
+				}
+			}
+		}
+	}
+	if(highlightThese.length==0){
+		setStatus('Find: nothing found!','(Enter a list of nodenumbers, names or transistor names)');
+		return;
+	} else if (highlightThese.length==1){
+		setStatus('Find results:',report);
+	} else {
+		setStatus('Find: multiple objects found','(' + highlightThese.length + ' objects)');
+	}
+	var xmin=seglist[0][0], xmax=seglist[0][0];
+	var ymin=seglist[0][1], ymax=seglist[0][1];
+	for(var s in seglist){
+		for(var i=0;i<seglist[s].length;i+=2){
+			if(seglist[s][i]<xmin) xmin=seglist[s][i];
+			if(seglist[s][i]>xmax) xmax=seglist[s][i];
+			if(seglist[s][i+1]<ymin) ymin=seglist[s][i+1];
+			if(seglist[s][i+1]>ymax) ymax=seglist[s][i+1];
+		}
+	}
+	zoomToBox(xmin,xmax,ymin,ymax);
+	updateLinkHere();
+	clearHighlight();  // nullify the simulation overlay (orange/purple)
+	hiliteNode(-1);    // unhighlight all nodes
+	setTimeout("hiliteNode(highlightThese);", 400);
+	setTimeout("hiliteNode(-1);", 800);
+	setTimeout("hiliteNode(highlightThese);", 1200);
+}
+
+// some notes on coordinates:
+// the localx and localy functions return canvas coordinate offsets from the canvas window top left corner
+// we divide the results by 'zoom' to get drawn coordinates useful in findNodeNumber
+// to convert to reported user chip coordinates we multiply by grChipSize/600
+// to compare to segdefs and transdefs coordinates we subtract grChipOffsetX from x and subtract y from grChipSize plus grChipOffsetY
+
+function handleClick(e){
+	var x = localx(hilite, e.clientX)/zoom;
+	var y = localy(hilite, e.clientY)/zoom;
+	var w = findNodeNumber(x,y);
+	// convert to chip coordinates
+	var cx = Math.round(x*grChipSize/600);
+	var cy = Math.round(y*grChipSize/600);
+	// prepare two lines of status report
+	var s1='x: ' + (cx - grChipOffsetX) + ' y: ' + (cy - grChipOffsetY);
+	var s2='node:&nbsp;' + w + '&nbsp;' + nodeName(w);
+	if(w==-1) {
+		setStatus(s1); // no node found, so report only coordinates
+		return;
+	}
+	// we have a node, but maybe we clicked over a transistor
+	var nodelist=[w];
+	// match the coordinate against transistor gate bounding boxes
+	x=cx-grChipOffsetX;
+	y=grChipSize+grChipOffsetY-cy;
+	for(var i=0;i<nodes[w].gates.length;i++){
+		var xmin=nodes[w].gates[i].bb[0], xmax=nodes[w].gates[i].bb[1];
+		var ymin=nodes[w].gates[i].bb[2], ymax=nodes[w].gates[i].bb[3];
+		if((x >= xmin) && (x <= xmax) && (y >= ymin) && (y <= ymax)){
+			// only one match at most, so we replace rather than push
+			nodelist=[nodes[w].gates[i].name];
+			s2='transistor: ' + nodes[w].gates[i].name + ' on ' + s2;
+		}
+	}
+	// if this is a shift-click, just find and highlight the pass-connected group
+	// and list the nodes (or nodenames, preferably)
+	if(e.shiftKey) {
+		getNodeGroup(w);
+		nodelist = group;
+		s2 = "nodegroup from&nbsp;" + s2 +
+			" (nodes:&nbsp;" +
+				group.map(function(x){return nodeName(x)?nodeName(x):x;}).join(",") +
+			")";
+	}
+	hiliteNode(nodelist);
+	setStatus(s1, s2);
+	if(ctrace) console.log(s1, s2);
+}
+
+function updateLoglevel(value){
+	loglevel = value;
+	logThese = signalSet(loglevel);
+	initLogbox(logThese);
+}
+
+function setupExpertMode(isOn){
+	document.getElementById('expertControlPanel').style.display = 'block';
+	if(loglevel==0)
+		updateLoglevel(1);
+	if(chipLayoutIsVisible)
+		document.getElementById('layoutControlPanel').style.display = 'block';
+}
+
+var consolegetc;    // global variable to hold last keypress in the console area
+var consolebox;
+
+function setupConsole(){
+	consolebox=document.getElementById('consolebox');
+	consolebox.onkeypress=function(e){consolegetc=e.charCode || e.keyCode;};
+}
+
+var chipsurround;
+
+function updateChipLayoutVisibility(isOn){
+	chipLayoutIsVisible=isOn;
+	if(chipLayoutIsVisible) {
+		updateChipLayoutAnimation(true);
+		// resize the two panes appropriately
+		$("#frame").trigger("resize", [ 810 ]);
+		$("#rightcolumn").trigger("resize", [ 738 - 180 ]);
+		// replace the Show Chip button with the chip graphics
+		chipsurround=document.getElementById('chipsurround');
+		chipsurround.style.display = 'block';
+		document.getElementById('layoutControlPanel').style.display = 'block';
+		document.getElementById('nochip').style.display = 'none';
+		// allow the browser to respond while we load the graphics
+		setStatus('loading graphics...');
+		setTimeout(setupChipLayoutGraphics, 0);
+	} else {
+		// cannot animate the layout if there is no canvas
+		updateChipLayoutAnimation(false);
+		// resize the two panes appropriately
+		$("#frame").trigger("resize", [ 120 ]);
+		$("#rightcolumn").trigger("resize", [ 200 ]);
+		// replace the layout display with a button to show it
+		document.getElementById('chipsurround').style.display = 'none';
+		document.getElementById('layoutControlPanel').style.display = 'none';
+		document.getElementById('nochip').style.display = 'block';
+	}
+}
+
+function setupChipLayoutGraphics(){
+	setupLayerVisibility();
+	setupBackground();
+	setupOverlay();
+	setupHilite();
+	setupHitBuffer();
+	recenter();
+	refresh();
+	document.getElementById('waiting').style.display = 'none';
+	setStatus('Ready!');  // would prefer chipStatus but it's not idempotent
+	// pre-fill the Find box if parameters supplied
+	if(typeof findThese != "undefined") {
+		document.getElementById('HighlightThese').value = findThese;
+		hiliteNodeList(); // will pan and zoom to fit
+	}
+	// pre-pan and zoom if requested (will override any zoom-to-fit by hiliteNodeList)
+	if(moveHereFirst!=null)
+		moveHere(moveHereFirst);
+	// draw any URL-requested labels and boxes
+	if(labelThese.length>0) {
+		for(var i=0;i<labelThese.length;i+=1)
+			flashBoxLabel(labelThese[i]);
+	}
+	// grant focus to the chip display to enable zoom keys
+	chipsurround.focus();
+	chipsurround.onwheel = function(e){handleWheelZoom(e);};
+	chipsurround.onmousedown = function(e){mouseDown(e);};
+	chipsurround.onkeypress = function(e){handleKey(e);};
+	chipsurround.onmouseout = function(e){mouseLeave(e);};
+}
+
+// utility function to save graphics pan and zoom
+function whereAmIAsQuery(){
+	var w=whereAmI();
+	return "panx="+w[0].toFixed(1)+"&pany="+w[1].toFixed(1)+"&zoom="+w[2].toFixed(1);
+}
+function whereAmI(){
+	return [centerx, centery, zoom];
+}
+
+// restore graphics pan and zoom (perhaps as given in the URL)
+function moveHere(place){
+	centerx = place[0];
+	centery = place[1];
+	setZoom(place[2]);
+}
+
+/////////////////////////
+//
+// Etc.
+//
+/////////////////////////
+
+function setChipStyle(props){
+	for(var i in props){
+		chipbg.style[i] = props[i];
+		overlay.style[i] = props[i];
+		hilite.style[i] = props[i];
+		hitbuffer.style[i] = props[i];
+	}
+}

index.html

@@ -2,24 +2,47 @@
 
 <head>
 <title>Visual 6502 in JavaScript</title>
-<style type="text/css">@import "wires.css";</style>
+
+<!-- by default, index.html will run in kiosk mode -->
+<style type="text/css">@import "kiosk.css";</style>
 <script src="segdefs.js"></script>
 <script src="transdefs.js"></script>
 <script src="nodenames.js"></script>
+<script src="kioskWires.js"></script>
 <script src="wires.js"></script>
 <script src="chipsim.js"></script>
 <script src="memtable.js"></script>
 <script src="macros.js"></script>
+<script src="testprogram.js"></script>
 
 <script type="text/javascript">
 function handleOnload() {
-       if((navigator.appName == 'Microsoft Internet Explorer') && (parseInt(navigator.appVersion,10)<9)){
-           document.getElementById('browsertrouble').innerHTML=
-             '<p>Sorry, '+navigator.appName+' not supported - showing you a picture instead!</p>';
-           document.getElementById('frame').innerHTML='<a href="browsertrouble.html"><img src="images/jssim2.png" style="border:10px"></a>';
-       }else{
-           setTimeout(setup,200);
-       }
+	// two checks and fixes here:
+        //   - replace the dynamic content with an image if running older versions of IE
+        //   - redirect to the expert page if we find any query parameters
+	//
+	/MSIE (\d+\.\d+);/.test(navigator.appVersion);
+	IEVersion=Number(RegExp.$1);
+	if((navigator.appName == 'Microsoft Internet Explorer') && (IEVersion<9)){
+		document.getElementById('browsertrouble').innerHTML=
+			'<p>Sorry, '+navigator.appName+' not supported - showing you a picture instead!</p>';
+		document.getElementById('frame').innerHTML='<a href="browsertrouble.html"><img src="images/jssim2.png" style="border:10px"></a>';
+	}else{
+		var suffix=location.search;
+		var path=location.pathname;
+		// ensure we always have a trailing slash
+		path=path.replace("index.html","").replace(/\/?$/,"/");
+
+		if (suffix != "") {
+			// redirect to the expert page
+			var prefix=location.protocol+"//"+location.host+path;
+			window.location.replace(prefix+"expert.html"+suffix);
+			return;
+		} else {
+			// normal case: start the simulator
+			setTimeout(setup,200);
+		}
+	}
 }
 </script>
 
@@ -39,11 +62,11 @@ lots of RAM. If you have trouble, please <a href="browsertrouble.html">check com
 <br />
 <span id="browsertrouble"></span>
 <br />
-Hit '>' to zoom in, '<' to zoom out
+Keyboard controls: 'z' to zoom in, 'x' to zoom out, 'n' to step the simulation.
 <br />
-Right-click to scroll around
+Mouse controls: Left-click and drag to scroll around (when you're zoomed in.)
 <br />
-Enter your own program into the array of RAM
+More information in the <a href="https://web.archive.org/web/20210608195625/http://visual6502.org/wiki/index.php?title=JssimUserHelp">User Guide</a>.
 <br />
 <br /> 
 </span>
@@ -56,29 +79,42 @@ Enter your own program into the array of RAM
 </div>
 <div class = "buttons">
   <div style="position:relative; float:left;">
-    <a href ="javascript:stopChip()"id="stop"><img class="navstop" src="images/stop.png"></a>
-    <a href ="javascript:runChip()" id="start"><img class="navplay" src="images/play.png"></a>
+    <a href ="javascript:stopChip()" id="stop"><img class="navstop" src="images/stop.png" title="stop"></a>
+    <a href ="javascript:runChip()" id="start"><img class="navplay" src="images/play.png" title="start"></a>
   </div>
   <div style="float:left;">
-    <a href ="javascript:resetChip()"><img class="navbutton" src="images/up.png"></a>
-    <a href ="javascript:stepBack()"><img class="navbutton" src="images/prev.png"></a>
-    <a href ="javascript:stepForward()"><img class="navbutton" src="images/next.png"></a>
+    <a href ="javascript:resetChip()"><img class="navbutton" src="images/up.png" title="reset"></a>
+    <a href ="javascript:stepBack()"><img class="navbutton" src="images/prev.png" title="back"></a>
+    <a href ="javascript:stepForward()"><img class="navbutton" src="images/next.png" title="step"></a>
   </div>
+  <div style="float:right; margin-left:20px;">... or try <a href="expert.html">Advanced</a></div>
 </div>
 <p class="status" id="status">x: 0<br>y: 0</p>
 <table class="memtable" id="memtable"></table>
 </div>
-<div id="updateShow"> Show:
-  <input type="checkbox" name="0" id="updateShow0" onchange="updateShow(this.name,this.checked)" />(metal)
-  <input type="checkbox" name="1" id="updateShow1" onchange="updateShow(this.name,this.checked)" />(switched diffusion)
-  <input type="checkbox" name="3" id="updateShow3" onchange="updateShow(this.name,this.checked)" />(grounded diffusion)
-  <input type="checkbox" name="4" id="updateShow4" onchange="updateShow(this.name,this.checked)" />(powered diffusion)
-  <input type="checkbox" name="5" id="updateShow5" onchange="updateShow(this.name,this.checked)" />(polysilicon)
-  <input type="checkbox" name="2" id="updateShow2" onchange="updateShow(this.name,this.checked)" />(diode)
+<div id="updateShow">
 </div>
 <br />
 <br />
-In addition to this JavaScript project, see our <a href="../python6502.html">Python-based simulator</a> which may be easier to customize, verify, and apply to the study of long programs.<br />
+Source code is available on <a href="http://github.com/trebonian/visual6502">github visual6502</a>.
+Use the online <a href="https://skilldrick.github.io/easy6502/#first-program">emulator and assembler</a> from the easy6502 tutorial
+and <a href="http://www.masswerk.at/6502/disassembler.html">disassembler</a> from mass:werk
 <br />
+For in-depth 6502 investigation and some more advanced features, try our <a href="expert.html">Advanced</a> page.
+<br />
+<br />
+
+<script type="text/javascript"><!--
+google_ad_client = "pub-9008420149077488";
+/* 728x90, created 9/22/10 */
+google_ad_slot = "4303982675";
+google_ad_width = 728;
+google_ad_height = 90;
+//-->
+</script>
+<script type="text/javascript"
+src="http://pagead2.googlesyndication.com/pagead/show_ads.js">
+</script>
+
 </body>
 </html>

kiosk.css

@@ -89,6 +89,6 @@ table.memtable {
 }
 
 #title {
-font-size:30px;
+font-size:30px;
 font-weight:bold;	
 }

kioskWires.js

@@ -0,0 +1,202 @@
+/*
+ Copyright (c) 2010 Brian Silverman, Barry Silverman
+
+ Permission is hereby granted, free of charge, to any person obtaining a copy
+ of this software and associated documentation files (the "Software"), to deal
+ in the Software without restriction, including without limitation the rights
+ to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ copies of the Software, and to permit persons to whom the Software is
+ furnished to do so, subject to the following conditions:
+
+ The above copyright notice and this permission notice shall be included in
+ all copies or substantial portions of the Software.
+
+ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ THE SOFTWARE.
+*/
+
+var centerx=300, centery=300;
+var zoom=1;
+var dragMouseX, dragMouseY, moved;
+var statbox;
+var animateChipLayout = true;
+var userCode=[];
+var userResetLow;
+var userResetHigh;
+
+// Some constants for the graphics presentation
+// the canvas is embedded in an 800x600 clipping div
+//   which gives rise to some of the 300 and 400 values in the code
+//   there are also some 600 values
+// the 6502D chip coords are in the box (216,179) to (8983,9807)
+// we have 4 canvases all the same size, now 2000 pixels square
+//   chip background - the layout
+//   overlay - a red/white transparency to show logic high or low
+//   hilite - to show the selected polygon
+//   hitbuffer - abusing color values to return which polygon is under a point
+// we no longer use a scaling transform - we now scale the chip data at 
+//   the point of drawing line segments
+// if the canvas is any smaller than chip coordinates there will be
+//   rounding artifacts, and at high zoom there will be anti-aliasing on edges.
+var grMaxZoom=12;
+var grChipSize=10000;
+var grChipOffsetX=400;
+var grChipOffsetY=0;
+var grCanvasSize=2000;
+var grLineWidth=1;
+
+// Index of layerNames corresponds to index into drawLayers
+var layernames = ['metal', 'switched diffusion', 'inputdiode', 'grounded diffusion', 'powered diffusion', 'polysilicon'];
+var colors = ['rgba(128,128,192,0.4)','#FFFF00','#FF00FF','#4DFF4D',
+              '#FF4D4D','#801AC0','rgba(128,0,255,0.75)'];
+var drawlayers = [true, true, true, true, true, true];
+              
+/////////////////////////
+//
+// Drawing Setup
+//
+/////////////////////////
+
+// try to present a meaningful page before starting expensive work
+function setup(){
+	statbox = document.getElementById('status');
+	setStatus('loading 6502...');
+	setTimeout(setup_part2, 0);
+}
+
+function setup_part2(){
+	frame = document.getElementById('frame');
+	statbox = document.getElementById('status');
+	setupNodes();
+	setupTransistors();
+	setupLayerVisibility();
+	setupBackground();
+	setupOverlay();
+	setupHilite();
+	setupHitBuffer();
+	recenter();
+	refresh();
+	setupTable();
+	window.onkeypress = function(e){handleKey(e);}
+	hilite.onmousedown = function(e){mouseDown(e);}
+	setStatus('resetting 6502...');
+	setTimeout(setup_part3, 0);
+}
+
+function setup_part3(){
+	loadProgram();
+	writeTriggers={};  // kiosk mode does not handle I/O
+	initChip();
+	document.getElementById('stop').style.visibility = 'hidden';
+	go();
+}
+
+
+/////////////////////////
+//
+// User Interface
+//
+/////////////////////////
+
+function handleKey(e){
+	var c = e.charCode || e.keyCode;
+	c = String.fromCharCode(c);
+	if('zx<>?np'.indexOf(c)==-1) return;
+	if((c=='x' || c=='<') && zoom>1) setZoom(zoom/1.2);
+	else if((c=='z' || c=='>') && zoom<grMaxZoom) setZoom(zoom*1.2);
+	else if(c=='?') setZoom(1);
+	else if(c=='n') stepForward();
+	else if(c=='p') stepBack();
+}
+
+function mouseDown(e){
+	e.preventDefault();
+	moved=false;	
+	dragMouseX = e.clientX;	
+	dragMouseY = e.clientY;
+	window.onmousemove = function(e){mouseMove(e)};
+	window.onmouseup = function(e){mouseUp(e)};
+}
+
+function mouseMove(e){
+	moved = true;
+	if(zoom==1) return;
+	var dx = e.clientX-dragMouseX;
+	var dy = e.clientY-dragMouseY;
+	dragMouseX = e.clientX;
+	dragMouseY = e.clientY;
+	centerx-=dx/zoom;
+	centerx = Math.max(centerx, 400/zoom);
+	centerx = Math.min(centerx, 600-400/zoom);
+	centery-=dy/zoom;
+	centery = Math.max(centery, 300/zoom);
+	centery = Math.min(centery, 600-300/zoom);
+	recenter();
+}
+
+function mouseUp(e){
+	if(!moved) handleClick(e);	
+	window.onmousemove = undefined;
+	window.onmouseup = undefined;
+}
+
+function setZoom(n){
+	zoom = n;
+	setChipStyle({
+		width: 600*n+'px',
+		height: 600*n+'px'
+	});
+	recenter();
+}
+
+function recenter(){
+	var top = -centery*zoom+300;
+	top = Math.min(top, 0);
+	top = Math.max(top, -600*(zoom-1));
+	var left = -centerx*zoom+400;
+	left = Math.min(left, 0);
+	left = Math.max(left, (zoom==1)?100:-600*zoom+800);
+	setChipStyle({
+		top: top+'px',
+		left: left+'px',
+	});
+}
+
+function handleClick(e){
+	var x = localx(hilite, e.clientX)/zoom;
+	var y = localy(hilite, e.clientY)/zoom;
+	var w = findNodeNumber(x,y);
+	if(e.shiftKey) {
+		getNodeGroup(w);
+		hiliteNode(group);
+	}
+	else {var a=new Array(); a.push(w); hiliteNode(a);}
+        var cx = Math.round(x*grChipSize/600);
+        var cy = Math.round(y*grChipSize/600);
+	if(w==-1) setStatus('x:',cx,'<br>','y:',cy);
+	else {
+		var s1='x: ' + cx + ' y: ' + cy;
+                var s2='node: ' + w + ' ' + nodeName(w);
+                setStatus(s1, s2);
+	}
+}
+
+/////////////////////////
+//
+// Etc.
+//
+/////////////////////////
+
+function setChipStyle(props){
+	for(var i in props){
+		chipbg.style[i] = props[i];
+		overlay.style[i] = props[i];
+		hilite.style[i] = props[i];
+		hitbuffer.style[i] = props[i];
+	}
+}

macros.js

@@ -1,5 +1,5 @@
 /*
- Copyright (c) 2010 Brian Silverman, Barry Silverman
+ Copyright (c) 2010 Brian Silverman, Barry Silverman, Ed Spittles, Achim Breidenbach
 
  Permission is hereby granted, free of charge, to any person obtaining a copy
  of this software and associated documentation files (the "Software"), to deal
@@ -21,30 +21,82 @@
 */
 
 var memory = Array();
-var code = [0xa9, 0x00, 0x20, 0x10, 0x00, 0x4c, 0x02, 0x00, 
-            0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-            0xe8, 0x88, 0xe6, 0x40, 0x38, 0x69, 0x02, 0x60];
 var cycle = 0;
 var trace = Array();
+var logstream = Array();
 var running = false;
+var logThese=[];
+var chipname='6502';
+var nodenamereset='res';
+var presetLogLists=[
+		['cycle'],
+		['ab','db','rw','Fetch','pc','a','x','y','s','p'],
+		['Execute','State'],
+		['ir','tcstate','-pd'],
+		['adl','adh','sb','alu'],
+		['alucin','alua','alub','alucout','aluvout','dasb'],
+		['plaOutputs','DPControl'],
+		['idb','dor'],
+		['irq','nmi',nodenamereset],
+	];
 
-function go(n){
-	for(var i=0;i<code.length;i++){
-		mWrite(i, code[i]);
-		setCellValue(i, code[i]);
-	}
-	mWrite(0xfffc, 0x00);
-	mWrite(0xfffd, 0x00);
-	steps();
+function loadProgram(){
+	// a moderate size of static testprogram might be loaded
+	if(testprogram.length!=0 && testprogramAddress != undefined)
+		for(var i=0;testprogram[i]!=undefined;i++){
+			var a=testprogramAddress+i;
+			mWrite(a, testprogram[i]);
+			if(a<0x200)
+				setCellValue(a, testprogram[i]);
+		}
+	// a small test program or patch might be passed in the URL
+	if(userCode.length!=0)
+		for(var i=0;i<userCode.length;i++){
+			if(userCode[i] != undefined){
+				mWrite(i, userCode[i]);
+				if(i<0x200)
+					setCellValue(i, userCode[i]);
+			}
+		}
+	// default reset vector will be 0x0000 because undefined memory reads as zero
+	if(userResetLow!=undefined)
+		mWrite(0xfffc, userResetLow);
+	if(userResetHigh!=undefined)
+		mWrite(0xfffd, userResetHigh);
 }
 
-function steps(){
+function go(){
+	if(typeof userSteps != "undefined"){
+		if(--userSteps==0){
+			running=false;
+			userSteps=undefined;
+		}
+	}
 	if(running) {
            step();
-	   setTimeout(steps, 0); // schedule the next poll
+	   setTimeout(go, 0); // schedule the next poll
         }
 }
 
+function goUntilSync(){
+	halfStep();
+	while(!isNodeHigh(nodenames['sync']) || isNodeHigh(nodenames['clk0']))
+		halfStep();
+}
+
+function goUntilSyncOrWrite(){
+	halfStep();
+	cycle++;
+	while(
+		!isNodeHigh(nodenames['clk0']) ||
+		( !isNodeHigh(nodenames['sync']) && isNodeHigh(nodenames['rw']) )
+	) {
+		halfStep();
+		cycle++;
+	}
+	chipStatus();
+}
+
 function testNMI(n){
         initChip();
 
@@ -85,56 +137,118 @@ function testNMI(n){
         for(var i=0;i<16;i++){step();}
 }
 
-
 function initChip(){
         var start = now();
-	for(var nn in nodes) nodes[nn].state = 'fl';
-	nodes[ngnd].state = 'gnd';
-	nodes[npwr].state = 'vcc';
+	for(var nn in nodes) {
+		nodes[nn].state = false;
+		nodes[nn].float = true;
+	}
+
+	nodes[ngnd].state = false;
+	nodes[ngnd].float = false;
+	nodes[npwr].state = true;
+	nodes[npwr].float = false;
 	for(var tn in transistors) transistors[tn].on = false;
-	setLow('res');
+	setLow(nodenamereset);
 	setLow('clk0');
 	setHigh('rdy'); setLow('so');
 	setHigh('irq'); setHigh('nmi');
 	recalcNodeList(allNodes()); 
 	for(var i=0;i<8;i++){setHigh('clk0'), setLow('clk0');}
-	setHigh('res');
-	for(var i=0;i<18;i++){resetStep();}
+	setHigh(nodenamereset);
+	for(var i=0;i<18;i++){halfStep();} // avoid updating graphics and trace buffer before user code
 	refresh();
 	cycle = 0;
 	trace = Array();
+	if(typeof expertMode != "undefined")
+		updateLogList();
 	chipStatus();
 	if(ctrace)console.log('initChip done after', now()-start);
 }
 
+function signalSet(n){
+	var signals=[];
+	for (var i=0; (i<=n)&&(i<presetLogLists.length) ; i++){
+		for (var j=0; j<presetLogLists[i].length; j++){
+			signals.push(presetLogLists[i][j]);
+		}
+	}
+	return signals;
+}
+
+function updateLogList(names){
+	// user supplied a list of signals, which we append to the set defined by loglevel
+	logThese = signalSet(loglevel);
+	if(typeof names == "undefined")
+		// this is a UI call - read the text input
+		names = document.getElementById('LogThese').value;
+	else
+		// this is an URL call - update the text input box
+		document.getElementById('LogThese').value = names;
+	names = names.split(/[\s,]+/);
+	for(var i=0;i<names.length;i++){
+		// could be a signal name, a node number, or a special name
+		if(typeof busToString(names[i]) != "undefined")
+			logThese.push(names[i]);
+	}
+	initLogbox(logThese);
+}
+
+var traceChecksum='';
+var goldenChecksum;
+
+// simulate a single clock phase, updating trace and highlighting layout
 function step(){
-	trace[cycle]= {chip: stateString(), mem: getMem()};
+	var s=stateString();
+	var m=getMem();
+	trace[cycle]= {chip: s, mem: m};
+	if(goldenChecksum != undefined)
+		traceChecksum=adler32(traceChecksum+s+m.slice(0,511).toString(16));
 	halfStep();
+	if(animateChipLayout)
+		refresh();
 	cycle++;
 	chipStatus();
 }
 
+// triggers for breakpoints, watchpoints, input pin events
+// almost always are undefined when tested, so minimal impact on performance
+clockTriggers={};
+writeTriggers={};
+readTriggers={};
+fetchTriggers={};
+
+// example instruction tracing triggers
+// fetchTriggers[0x20]="console.log('0x'+readAddressBus().toString(16)+': JSR');";
+// fetchTriggers[0x60]="console.log('0x'+readAddressBus().toString(16)+': RTS');";
+// fetchTriggers[0x4c]="console.log('0x'+readAddressBus().toString(16)+': JMP');";
+
+// simulate a single clock phase with no update to graphics or trace
 function halfStep(){
 	var clk = isNodeHigh(nodenames['clk0']);
 	if (clk) {setLow('clk0'); handleBusRead(); } 
 	else {setHigh('clk0'); handleBusWrite();}
-	refresh();
-}
+	eval(clockTriggers[cycle+1]);  // pre-apply next tick's inputs now, so the updates are displayed
 
-function resetStep(){
-	var clk = isNodeHigh(nodenames['clk0']);
-	if (clk) {setLow('clk0'); handleBusRead(); }
-	else {setHigh('clk0'); handleBusWrite();}
 }
 
 function handleBusRead(){
-	if(isNodeHigh(nodenames['rw'])) writeDataBus(mRead(readAddressBus()));
+	if(isNodeHigh(nodenames['rw'])){
+		var a = readAddressBus();
+		var d = eval(readTriggers[a]);
+		if(d == undefined)
+			d = mRead(readAddressBus());
+		if(isNodeHigh(nodenames['sync']))
+			eval(fetchTriggers[d]);
+		writeDataBus(d);
+	}
 }
 
 function handleBusWrite(){
 	if(!isNodeHigh(nodenames['rw'])){
 		var a = readAddressBus();
 		var d = readDataBus();
+		eval(writeTriggers[a]);
 		mWrite(a,d);
 		if(a<0x200) setCellValue(a,d);
 	}
@@ -150,8 +264,8 @@ function readPstring(){
    var result;
    result = (isNodeHigh(nodenames['p7'])?'N':'n') +
             (isNodeHigh(nodenames['p6'])?'V':'v') +
-            '-' +
-            (isNodeHigh(nodenames['p3'])?'B':'b') +
+            '&#8209' +  // non-breaking hyphen
+            (isNodeHigh(nodenames['p4'])?'B':'b') +
             (isNodeHigh(nodenames['p3'])?'D':'d') +
             (isNodeHigh(nodenames['p2'])?'I':'i') +
             (isNodeHigh(nodenames['p1'])?'Z':'z') +
@@ -163,6 +277,98 @@ function readPC(){return (readBits('pch', 8)<<8) + readBits('pcl', 8);}
 function readPCL(){return readBits('pcl', 8);}
 function readPCH(){return readBits('pch', 8);}
 
+// for one-hot or few-hot signal collections we want to list the active ones
+// and for brevity we remove the common prefix
+function listActiveSignals(pattern){
+	var r=new RegExp(pattern);
+	var list=[];
+	for(var i in nodenamelist){
+		if(r.test(nodenamelist[i])) {
+			if(isNodeHigh(nodenames[nodenamelist[i]]))
+				// also map hyphen to a non-breaking version
+				list.push(nodenamelist[i].replace(r,'').replace(/-/g,'&#8209'));
+		}
+	}
+	return list;
+}
+
+// The 6502 TCState is almost but not quite an inverted one-hot shift register
+function listActiveTCStates() {
+	var s=[];
+	if(!isNodeHigh(nodenames['clock1']))	s.push("T0");
+	if(!isNodeHigh(nodenames['clock2']))	s.push("T1");
+	if(!isNodeHigh(nodenames['t2']))	s.push("T2");
+	if(!isNodeHigh(nodenames['t3']))	s.push("T3");
+	if(!isNodeHigh(nodenames['t4']))	s.push("T4");
+	if(!isNodeHigh(nodenames['t5']))	s.push("T5");
+	return s.join("+");
+}
+
+    // Show all time code node states (active and inactive) in fixed format,
+    // with non-PLA-controlling internal state indication in square
+    // brackets, followed by RCL-resident timing state indication.
+    // ".." for a PLA-controlling node indicates inactive state, "T"* for a
+    // PLA-controlling node indicates active state.
+    // Bracketed codes are one of T1/V0/T6/..
+    // V0 indicates the VEC0 node, T6 is a synonym for the VEC1 node.
+    // The RCL codes are one of SD1/SD2/...
+    // For discussion of this reconstruction, see:
+    // http://visual6502.org/wiki/index.php?title=6502_Timing_States
+function allTCStates( useHTML )
+{
+    var s = "";
+    var _spc;
+    useHTML = (typeof useHTML === 'undefined') ? false : useHTML;
+        // Use Non-Breaking Space for presentation in an HTML (browser)
+        // context, else use ASCII space for logging context
+    _spc = useHTML ? '&nbsp;' : ' ';
+    if ( !isNodeHigh( nodenames[ 'clock1' ] ) ) s += "T0"; else s += "..";
+    s += _spc;
+        // T+ in visual6502 is called T1x in
+        // http://www.weihenstephan.org/~michaste/pagetable/6502/6502.jpg
+        // Notated as T+ for compatibility with PLA node names
+    if ( !isNodeHigh( nodenames[ 'clock2' ] ) ) s += "T+"; else s += "..";
+    s += _spc;
+    if ( !isNodeHigh( nodenames[ 't2' ] ) ) s += "T2"; else s += "..";
+    s += _spc;
+    if ( !isNodeHigh( nodenames[ 't3' ] ) ) s += "T3"; else s += "..";
+    s += _spc;
+    if ( !isNodeHigh( nodenames[ 't4' ] ) ) s += "T4"; else s += "..";
+    s += _spc;
+    if ( !isNodeHigh( nodenames[ 't5' ] ) ) s += "T5"; else s += "..";
+    s += _spc + "[";
+    // Check three confirmed exclusive states (three nodes)
+    if ( isNodeHigh( 862 ) ) {
+        s += "T1";
+        // ...else if VEC0 is on...
+    } else if ( isNodeHigh( nodenames[ 'VEC0' ] ) ) {
+        // ...then tell the outside world
+        s += "V0";
+        // ...else if VEC1 is on...
+    } else if ( isNodeHigh( nodenames[ 'VEC1' ] ) ) {
+        // ...then this is the canonical T6. It is a synonym for VEC1
+        s += "T6";
+    } else {
+        // ...else none of the "hidden" bits in the clock state is active
+        s += "..";
+    }
+    s += "]" + _spc;
+    // Check the RCL's two confirmed exclusive states (two nodes)
+        // If this node is grounding ~WR...
+    if ( isNodeHigh( 440 ) ) {
+        // ...then we can regard this state as Store Data 1
+        s += "SD1";
+        // ...else if this node is grounding ~WR...
+    } else if ( isNodeHigh( 1258 ) ) {
+        // ...then we can regard this state as Store Data 2
+        s += "SD2";
+    } else {
+        // ...else none of the RCL-resident timing bits is active
+        s += "...";
+    }
+    return s;
+}
+
 function readBit(name){
         return isNodeHigh(nodenames[name])?1:0;
 }
@@ -175,6 +381,72 @@ function readBits(name, n){
 	return res;
 }
 
+function busToString(busname){
+	// takes a signal name or prefix
+	// returns an appropriate string representation
+	// some 'signal names' are CPU-specific aliases to user-friendly string output
+	if(busname=='cycle')
+		return cycle>>1;
+	if(busname=='pc')
+		return busToHex('pch') + busToHex('pcl');
+	if(busname=='p')
+		return readPstring();
+	if(busname=='tcstate')
+		return ['clock1','clock2','t2','t3','t4','t5'].map(busToHex).join("");
+	if(busname=='State')
+		return listActiveTCStates();
+	if(busname=='TState')
+		return allTCStates( true );
+	if(busname=='Phi')
+		// Pretty-printed phase indication based on the state of cp1,
+                // the internal Phase 1 node
+		return '&Phi;' +
+		       (isNodeHigh( nodenames[ 'cp1' ] ) ? '1' : '2');
+	if(busname=='Execute')
+		return disassemblytoHTML(readBits('ir',8));
+	if(busname=='Fetch')
+		return isNodeHigh(nodenames['sync'])?disassemblytoHTML(readDataBus()):"";
+	if(busname=='plaOutputs')
+		// PLA outputs are mostly ^op- but some have a prefix too
+		//    - we'll allow the x and xx prefix but ignore the #
+		return listActiveSignals('^([x]?x-)?op-');
+	if(busname=='DPControl')
+		return listActiveSignals('^dpc[-]?[0-9]+_');
+	if(busname[0]=="-"){
+		// invert the value of the bus for display
+		var value=busToHex(busname.slice(1))
+		if(typeof value != "undefined")
+			return value.replace(/./g,function(x){return (15-parseInt(x,16)).toString(16)});
+		else
+			return undefined;;
+	} else {
+		return busToHex(busname);
+	}
+}
+
+function busToHex(busname){
+	// may be passed a bus or a signal, so allow multiple signals
+	var width=0;
+	var r=new RegExp('^' + busname + '[0-9]+$');
+	for(var i in nodenamelist){
+		if(r.test(nodenamelist[i])) {
+			width++;
+		}
+	}
+	if(width==0) {
+		// not a bus, so could be a signal, a nodenumber or a mistake
+		if(typeof nodenames[busname] != "undefined")
+			return isNodeHigh(nodenames[busname])?"1":"0";
+		if((parseInt(busname)!=NaN) && (typeof nodes[busname] != "undefined"))
+			return isNodeHigh(busname)?"1":"0";
+		return undefined;
+	}
+	if(width>16)
+		return undefined;
+	// finally, convert from logic values to hex
+	return (0x10000+readBits(busname,width)).toString(16).slice(-(width-1)/4-1);
+}
+
 function writeDataBus(x){
 	var recalcs = Array();
 	for(var i=0;i<8;i++){
@@ -195,12 +467,11 @@ function mRead(a){
 
 function mWrite(a, d){memory[a]=d;}
 
-
 function clkNodes(){
 	var res = Array();
 	res.push(943);
 	for(var i in nodes[943].gates){
-		var t = transistors[nodes[943].gates[i]];
+		var t = nodes[943].gates[i];
 		if(t.c1==npwr) res.push(t.c2);
 		if(t.c2==npwr) res.push(t.c1);
 	}
@@ -212,8 +483,10 @@ function runChip(){
 	var stop = document.getElementById('stop');
 	start.style.visibility = 'hidden';
 	stop.style.visibility = 'visible';
+	if(typeof running == "undefined")
+		initChip();
 	running = true;
-        steps();
+        go();
 }
 
 function stopChip(){
@@ -226,11 +499,13 @@ function stopChip(){
 
 function resetChip(){
 	stopChip();
-        setStatus('resetting 6502...');                          
+        setStatus('resetting ' + chipname + '...');
 	setTimeout(initChip,0);
 }
 
 function stepForward(){
+	if(typeof running == "undefined")
+		initChip();
 	stopChip();
 	step();
 }
@@ -259,28 +534,148 @@ function chipStatus(){
 	        ' Y:' + hexByte(readY()) +
 	        ' SP:' + hexByte(readSP()) +
 	        ' ' + readPstring();
-	var machine3 =
-	        ' Sync:' + readBit('sync')
-		' IRQ:' + readBit('irq') +
-	        ' NMI:' + readBit('nmi');
-	var machine4 =
-	        ' IR:' + hexByte(255 - readBits('notir', 8)) +
-	        ' idl:' + hexByte(255 - readBits('idl', 8)) +
-	        ' alu:' + hexByte(255 - readBits('alu', 8)) +
-	        ' TCstate:' + readBit('clock1') + readBit('clock2') +
-                	readBit('t2') + readBit('t3') + readBit('t4') + readBit('t5');
-        var machine5 =
-                ' notRdy0:' + readBit('notRdy0') +
-                ' fetch:'   + readBit('fetch') +
-                ' clearIR:' + readBit('clearIR') +
-                ' D1x1:'    + readBit('D1x1');
-        setStatus(machine1 + "<br>" + machine2);
-	if (loglevel>2 && ctrace) {
-		console.log(machine1 + " " + machine2 + " " + machine3 + " " + machine4 + " " + machine5);
+	var machine3 = 
+		'Hz: ' + estimatedHz().toFixed(1);
+	if(typeof expertMode != "undefined") {
+		machine3 += ' Exec: ' + busToString('Execute') + '(' + busToString('State') + ')';
+		if(isNodeHigh(nodenames['sync']))
+			machine3 += ' (Fetch: ' + busToString('Fetch') + ')';
+		if(goldenChecksum != undefined)
+			machine3 += " Chk:" + traceChecksum + ((traceChecksum==goldenChecksum)?" OK":" no match");
+	}
+	setStatus(machine1, machine2, machine3);
+	if (logThese.length>1) {
+		updateLogbox(logThese);
 	}
 	selectCell(ab);
 }
 
+// run for an extended number of cycles, with low overhead, for interactive programs or for benchmarking
+//    note: to run an interactive program, use an URL like
+//    http://visual6502.org/JSSim/expert.html?graphics=f&loglevel=-1&headlesssteps=-500
+function goFor(){
+	var n = headlessSteps;  //  a negative value is a request to free-run
+	if(headlessSteps<0)
+		n=-n;
+	var start = document.getElementById('start');
+	var stop = document.getElementById('stop');
+	start.style.visibility = 'hidden';
+	stop.style.visibility = 'visible';
+	if(typeof running == "undefined") {
+		initChip();
+	}
+	running = true;
+	setTimeout("instantaneousHz(); goForN("+n+")",0);
+}
+
+// helper function: allows us to poll 'running' without resetting it when we're re-scheduled
+function goForN(n){
+	var n2=n;  // save our parameter so we can re-submit ourselves
+	while(n--){
+		halfStep();
+		cycle++;
+	}
+	instantaneousHz();
+	chipStatus();
+	if((headlessSteps<0) && running){
+		setTimeout("goForN("+n2+")",0); // re-submit ourselves if we are meant to free-run
+		return;
+	}
+	running = false;
+	var start = document.getElementById('start');
+	var stop = document.getElementById('stop');
+	start.style.visibility = 'visible';
+	stop.style.visibility = 'hidden';
+}
+
+var prevHzTimeStamp=0;
+var prevHzCycleCount=0;
+var prevHzEstimate1=1;
+var prevHzEstimate2=1;
+var HzSamplingRate=10;
+
+// return an averaged speed: called periodically during normal running
+function estimatedHz(){
+	if(cycle%HzSamplingRate!=3)
+		return prevHzEstimate1;
+	var HzTimeStamp = now();
+	var HzEstimate = (cycle-prevHzCycleCount+.01)/(HzTimeStamp-prevHzTimeStamp+.01);
+	HzEstimate=HzEstimate*1000/2; // convert from phases per millisecond to Hz
+	if(HzEstimate<5)
+		HzSamplingRate=5;  // quicker
+	if(HzEstimate>10)
+		HzSamplingRate=10; // smoother
+	prevHzEstimate2=prevHzEstimate1;
+	prevHzEstimate1=(HzEstimate+prevHzEstimate1+prevHzEstimate2)/3; // wrong way to average speeds
+	prevHzTimeStamp=HzTimeStamp;
+	prevHzCycleCount=cycle;
+	return prevHzEstimate1
+}
+
+// return instantaneous speed: called twice, before and after a timed run using goFor()
+function instantaneousHz(){
+	var HzTimeStamp = now();
+	var HzEstimate = (cycle-prevHzCycleCount+.01)/(HzTimeStamp-prevHzTimeStamp+.01);
+	HzEstimate=HzEstimate*1000/2; // convert from phases per millisecond to Hz
+	prevHzEstimate1=HzEstimate;
+	prevHzEstimate2=prevHzEstimate1;
+	prevHzTimeStamp=HzTimeStamp;
+	prevHzCycleCount=cycle;
+	return prevHzEstimate1
+}
+
+var logbox;
+function initLogbox(names){
+	logbox=document.getElementById('logstream');
+	if(logbox==null)return;
+
+	names=names.map(function(x){return x.replace(/^-/,'')});
+	logStream = [];
+	logStream.push("<td class=header>" + names.join("</td><td class=header>") + "</td>");
+	logbox.innerHTML = "<tr>"+logStream.join("</tr><tr>")+"</tr>";
+}
+
+var logboxAppend=true;
+
+// can append or prepend new states to the log table
+// when we reverse direction we need to reorder the log stream
+function updateLogDirection(){
+	var loglines=[];
+	logboxAppend=!logboxAppend;
+	// the first element is the header so we can't reverse()
+	for (var i=1;i<logStream.length;i++) {
+		loglines.unshift(logStream[i]);
+	}
+	loglines.unshift(logStream[0]);
+	logStream=loglines;
+	logbox.innerHTML = "<tr>"+logStream.join("</tr><tr>")+"</tr>";
+}
+
+// update the table of signal values, by prepending or appending
+function updateLogbox(names){
+	var signals=[];
+	var odd=true;
+	var bg;
+	var row;
+
+	for(var i in names){
+		if(cycle % 4 < 2){
+			bg = odd ? " class=oddcol":"";
+		} else {
+			bg = odd ? " class=oddrow":" class=oddrowcol";
+		}
+		signals.push("<td" + bg + ">" + busToString(names[i]) + "</td>");
+		odd =! odd;
+	}
+	row = "<tr>" + signals.join("") + "</tr>";
+	if(logboxAppend)
+	        logStream.push(row);
+	else
+		logStream.splice(1,0,row);
+
+	logbox.innerHTML = logStream.join("");
+}
+
 function getMem(){
 	var res = Array();
 	for(var i=0;i<0x200;i++) res.push(mRead(i));
@@ -293,3 +688,177 @@ function setMem(arr){
 
 function hexWord(n){return (0x10000+n).toString(16).substring(1)}
 function hexByte(n){return (0x100+n).toString(16).substring(1)}
+
+function adler32(x){
+	var a=1;
+	var b=0;
+	for(var i=0;i<x.length;i++){
+		a=(a+x.charCodeAt(i))%65521;
+		b=(b+a)%65521;
+	}
+	return (0x100000000+(b<<16)+a).toString(16).slice(-8);
+}
+
+// sanitised opcode for HTML output
+function disassemblytoHTML(byte){
+	var opcode=disassembly[byte];
+	if(typeof opcode == "undefined")
+		return "unknown"
+	return opcode.replace(/ /,'&nbsp;');
+}
+
+// opcode lookup for 6502 - not quite a disassembly
+//   javascript derived from Debugger.java by Achim Breidenbach
+var disassembly={
+0x00:"BRK",
+0x01:"ORA (zp,X)",
+0x05:"ORA zp",
+0x06:"ASL zp",
+0x08:"PHP",
+0x09:"ORA #",
+0x0A:"ASL ",
+0x0D:"ORA Abs",
+0x0E:"ASL Abs",
+0x10:"BPL ",
+0x11:"ORA (zp),Y",
+0x15:"ORA zp,X",
+0x16:"ASL zp,X",
+0x18:"CLC",
+0x19:"ORA Abs,Y",
+0x1D:"ORA Abs,X",
+0x1E:"ASL Abs,X",
+0x20:"JSR Abs",
+0x21:"AND (zp,X)",
+0x24:"BIT zp",
+0x25:"AND zp",
+0x26:"ROL zp",
+0x28:"PLP",
+0x29:"AND #",
+0x2A:"ROL ",
+0x2C:"BIT Abs",
+0x2D:"AND Abs",
+0x2E:"ROL Abs",
+0x30:"BMI ",
+0x31:"AND (zp),Y",
+0x35:"AND zp,X",
+0x36:"ROL zp,X",
+0x38:"SEC",
+0x39:"AND Abs,Y",
+0x3D:"AND Abs,X",
+0x3E:"ROL Abs,X",
+0x40:"RTI",
+0x41:"EOR (zp,X)",
+0x45:"EOR zp",
+0x46:"LSR zp",
+0x48:"PHA",
+0x49:"EOR #",
+0x4A:"LSR ",
+0x4C:"JMP Abs",
+0x4D:"EOR Abs",
+0x4E:"LSR Abs",
+0x50:"BVC ",
+0x51:"EOR (zp),Y",
+0x55:"EOR zp,X",
+0x56:"LSR zp,X",
+0x58:"CLI",
+0x59:"EOR Abs,Y",
+0x5D:"EOR Abs,X",
+0x5E:"LSR Abs,X",
+0x60:"RTS",
+0x61:"ADC (zp,X)",
+0x65:"ADC zp",
+0x66:"ROR zp",
+0x68:"PLA",
+0x69:"ADC #",
+0x6A:"ROR ",
+0x6C:"JMP (Abs)",
+0x6D:"ADC Abs",
+0x6E:"ROR Abs",
+0x70:"BVS ",
+0x71:"ADC (zp),Y",
+0x75:"ADC zp,X",
+0x76:"ROR zp,X",
+0x78:"SEI",
+0x79:"ADC Abs,Y",
+0x7D:"ADC Abs,X",
+0x7E:"ROR Abs,X",
+0x81:"STA (zp,X)",
+0x84:"STY zp",
+0x85:"STA zp",
+0x86:"STX zp",
+0x88:"DEY",
+0x8A:"TXA",
+0x8C:"STY Abs",
+0x8D:"STA Abs",
+0x8E:"STX Abs",
+0x90:"BCC ",
+0x91:"STA (zp),Y",
+0x94:"STY zp,X",
+0x95:"STA zp,X",
+0x96:"STX zp,Y",
+0x98:"TYA",
+0x99:"STA Abs,Y",
+0x9A:"TXS",
+0x9D:"STA Abs,X",
+0xA0:"LDY #",
+0xA1:"LDA (zp,X)",
+0xA2:"LDX #",
+0xA4:"LDY zp",
+0xA5:"LDA zp",
+0xA6:"LDX zp",
+0xA8:"TAY",
+0xA9:"LDA #",
+0xAA:"TAX",
+0xAC:"LDY Abs",
+0xAD:"LDA Abs",
+0xAE:"LDX Abs",
+0xB0:"BCS ",
+0xB1:"LDA (zp),Y",
+0xB4:"LDY zp,X",
+0xB5:"LDA zp,X",
+0xB6:"LDX zp,Y",
+0xB8:"CLV",
+0xB9:"LDA Abs,Y",
+0xBA:"TSX",
+0xBC:"LDY Abs,X",
+0xBD:"LDA Abs,X",
+0xBE:"LDX Abs,Y",
+0xC0:"CPY #",
+0xC1:"CMP (zp,X)",
+0xC4:"CPY zp",
+0xC5:"CMP zp",
+0xC6:"DEC zp",
+0xC8:"INY",
+0xC9:"CMP #",
+0xCA:"DEX",
+0xCC:"CPY Abs",
+0xCD:"CMP Abs",
+0xCE:"DEC Abs",
+0xD0:"BNE ",
+0xD1:"CMP (zp),Y",
+0xD5:"CMP zp,X",
+0xD6:"DEC zp,X",
+0xD8:"CLD",
+0xD9:"CMP Abs,Y",
+0xDD:"CMP Abs,X",
+0xDE:"DEC Abs,X",
+0xE0:"CPX #",
+0xE1:"SBC (zp,X)",
+0xE4:"CPX zp",
+0xE5:"SBC zp",
+0xE6:"INC zp",
+0xE8:"INX",
+0xE9:"SBC #",
+0xEA:"NOP",
+0xEC:"CPX Abs",
+0xED:"SBC Abs",
+0xEE:"INC Abs",
+0xF0:"BEQ ",
+0xF1:"SBC (zp),Y",
+0xF5:"SBC zp,X",
+0xF6:"INC zp,X",
+0xF8:"SED",
+0xF9:"SBC Abs,Y",
+0xFD:"SBC Abs,X",
+0xFE:"INC Abs,X",
+};

memtable.js

@@ -59,7 +59,9 @@ function cellKeydown(e){
 }
 
 function setCellValue(n, val){
-	val%=256; 
+	if(val==undefined)
+		val=0x00;
+	val%=256;
 	cellEl(n).val=val;
 	cellEl(n).innerHTML=hexByte(val);
 }
@@ -71,7 +73,7 @@ function selectCell(n){
 	if(n>=0x200) return;
 	cellEl(n).style.background = '#ff8';
 	selected = n;
-	window.onkeydown = function(e){cellKeydown(e);};
+	table.onkeydown = function(e){cellKeydown(e);};
 }
 
 function unselectCell(){
@@ -84,6 +86,6 @@ function unselectCell(){
 function cellEl(n){
 	var r = n>>4;
 	var c = n%16;
-	var e = table.children[r].children[c+1];
+	var e = table.childNodes[r].childNodes[c+1];
 	return e;
 }

save.php

@@ -1,18 +0,0 @@
-<?php
-
-$filename = $_REQUEST['name'];
-file_put_contents($filename, file_get_contents("php://input"));
-
-function file_put_contents($filename, $data) {
-	$f = @fopen($filename, 'w');
-	if ($f) {
-		$bytes = fwrite($f, $data);
-		fclose($f);
-		return $bytes;
-	}
-
-	return false;
-}
-
-?>
-

testprogram.js

@@ -0,0 +1,36 @@
+// This file testprogram.js can be substituted by one of several tests
+// which may not be redistributable
+// for example
+//    cbmbasic  loaded at 0xa000 with entry point 0xe394
+//    test6502 (by Bird Computer) loaded at 0x8000 with entry point 0x8000
+//
+// (can use xxd -i to convert binary into C include syntax, as a starting point)
+//
+testprogramAddress=0x0000;
+
+// we want to auto-clear the console if any output is sent by the program
+var consoleboxStream="";
+
+// demonstrate write hook
+writeTriggers[0x000F]="consoleboxStream += String.fromCharCode(d);"+
+                      "consolebox.innerHTML = consoleboxStream;";
+
+// demonstrate read hook (not used by this test program)
+readTriggers[0xD011]="((consolegetc==undefined)?0:0xff)";  // return zero until we have a char
+readTriggers[0xD010]="var c=consolegetc; consolegetc=undefined; (c)";
+
+testprogram = [
+	0xa9, 0x00,              // LDA #$00
+	0x20, 0x10, 0x00,        // JSR $0010
+	0x4c, 0x02, 0x00,        // JMP $0002
+
+	0x00, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x40,
+
+	0xe8,                    // INX
+	0x88,                    // DEY
+	0xe6, 0x0F,              // INC $0F
+	0x38,                    // SEC
+	0x69, 0x02,              // ADC #$02
+	0x60                     // RTS
+];

wires.js

@@ -21,61 +21,15 @@
 */
 
 var frame, chipbg, overlay, hilite, hitbuffer, ctx;
-var centerx=300, centery=300;
-var zoom=1;
-var dragMouseX, dragMouseY, moved;
-var statbox;
-
-// Index of layerNames corresponds to index into drawLayers
-var layernames = ['metal', 'switched diffusion', 'inputdiode', 'grounded diffusion', 'powered diffusion', 'polysilicon'];
-var colors = ['rgba(128,128,192,0.4)','#FFFF00','#FF00FF','#4DFF4D',
-              '#FF4D4D','#801AC0','rgba(128,0,255,0.75)'];
-var drawlayers = [true, true, true, true, true, true];
-              
 var nodes = new Array();
 var transistors = {};
+var nodenamelist=[];
 
 var ngnd = nodenames['vss'];
 var npwr = nodenames['vcc'];
 
-
-/////////////////////////
-//
-// Drawing Setup
-//
-/////////////////////////
-
-// try to present a meaningful page before starting expensive work
-function setup(){
-	statbox = document.getElementById('status');
-	setStatus('loading 6502...');
-	setTimeout(setup_part2, 0);
-}
-
-function setup_part2(){
-	frame = document.getElementById('frame');
-	statbox = document.getElementById('status');
-	setupNodes();
-	setupTransistors();
-	setupLayerVisibility();
-	setupBackground();
-	setupOverlay();
-	setupHilite();
-	setupHitBuffer();
-	recenter();
-	refresh();
-	setupTable();
-	window.onkeypress = function(e){handleKey(e);}
-	hilite.onmousedown = function(e){mouseDown(e);}
-	setStatus('resetting 6502...');
-	setTimeout(setup_part3, 0);
-}
-
-function setup_part3(){
-	initChip();
-	document.getElementById('stop').style.visibility = 'hidden';
-	go();
-}
+var chipLayoutIsVisible = true;  // only modified in expert mode
+var hilited = [];
 
 function setupNodes(){
 	for(var i in segdefs){
@@ -83,7 +37,7 @@ function setupNodes(){
 		var w = seg[0];
 		if(nodes[w]==undefined) 
 			nodes[w] = {segs: new Array(), num: w, pullup: seg[1]=='+',
-			            state: 'fl', gates: new Array(), c1c2s: new Array()};
+			            state: false, gates: new Array(), c1c2s: new Array()};
 		if(w==ngnd) continue;
 		if(w==npwr) continue;
 		nodes[w].segs.push(seg.slice(3));
@@ -97,10 +51,13 @@ function setupTransistors(){
 		var gate = tdef[1];
 		var c1 = tdef[2];
 		var c2 = tdef[3];
-		var trans = {name: name, on: false, gate: gate, c1: c1, c2: c2};
-		nodes[gate].gates.push(name);
-		nodes[c1].c1c2s.push(name);
-		nodes[c2].c1c2s.push(name);
+		var bb = tdef[4];
+		if(c1==ngnd) {c1=c2;c2=ngnd;}
+		if(c1==npwr) {c1=c2;c2=npwr;}
+		var trans = {name: name, on: false, gate: gate, c1: c1, c2: c2, bb: bb};
+		nodes[gate].gates.push(trans);
+		nodes[c1].c1c2s.push(trans);
+		nodes[c2].c1c2s.push(trans);
 		transistors[name] = trans;
 	}
 }
@@ -116,14 +73,13 @@ function setupLayerVisibility(){
 
 function setupBackground(){
 	chipbg = document.getElementById('chipbg');
-	chipbg.width = 4000;
-	chipbg.height = 4000;
+	chipbg.width = grCanvasSize;
+	chipbg.height = grCanvasSize;
 	var ctx = chipbg.getContext('2d');
-	ctx.scale(chipbg.width/10000, chipbg.height/10000);
 	ctx.fillStyle = '#000000';
 	ctx.strokeStyle = 'rgba(255,255,255,0.5)';
-	ctx.lineWidth = 4;
-	ctx.fillRect(0,0,10000,10000);
+	ctx.lineWidth = grLineWidth;
+	ctx.fillRect(0,0,grCanvasSize,grCanvasSize);
 	for(var i in segdefs){
 		var seg = segdefs[i];
 		var c = seg[2];
@@ -138,27 +94,24 @@ function setupBackground(){
 
 function setupOverlay(){
 	overlay = document.getElementById('overlay');
-	overlay.width = 4000;
-	overlay.height = 4000;
+	overlay.width = grCanvasSize;
+	overlay.height = grCanvasSize;
 	ctx = overlay.getContext('2d');
-	ctx.scale(overlay.width/10000, overlay.height/10000);
 }
 
 function setupHilite(){
 	hilite = document.getElementById('hilite');
-	hilite.width = 4000;
-	hilite.height = 4000;
+	hilite.width = grCanvasSize;
+	hilite.height = grCanvasSize;
 	var ctx = hilite.getContext('2d');
-	ctx.scale(hilite.width/10000, hilite.height/10000);
 }
 
 function setupHitBuffer(){
 	hitbuffer = document.getElementById('hitbuffer');
-	hitbuffer.width = 4000;
-	hitbuffer.height = 4000;
+	hitbuffer.width = grCanvasSize;
+	hitbuffer.height = grCanvasSize;
 	hitbuffer.style.visibility = 'hidden';
 	var ctx = hitbuffer.getContext('2d');
-	ctx.scale(hitbuffer.width/10000, hitbuffer.height/10000);
 	for(i in nodes) hitBufferNode(ctx, i, nodes[i].segs);
 }
 
@@ -183,10 +136,12 @@ function hexdigit(n){return '0123456789ABCDEF'.charAt(n);}
 /////////////////////////
 
 function refresh(){
-	ctx.clearRect(0,0,10000,10000);
+	if(!chipLayoutIsVisible) return;
+	ctx.clearRect(0,0,grCanvasSize,grCanvasSize);
 	for(i in nodes){
 		if(isNodeHigh(i)) overlayNode(nodes[i].segs);
 	}
+	hiliteNode(hilited);
 }
 
 function overlayNode(w){
@@ -197,115 +152,90 @@ function overlayNode(w){
 	}
 }
 
+// originally to highlight using a list of node numbers
+//   but can now include transistor names
 function hiliteNode(n){
 	var ctx = hilite.getContext('2d');
-	ctx.clearRect(0,0,10000,10000);
-	ctx.fillStyle = 'rgba(255,255,255,0.7)';
+	ctx.clearRect(0,0,grCanvasSize,grCanvasSize);
 	if(n==-1) return;
-	if(isNodeHigh(n[0]))
-		ctx.fillStyle = 'rgba(255,0,0,0.7)';
+	hilited = n;
 
 	for(var i in n){
+		if(typeof n[i] != "number") {
+			hiliteTrans([n[i]]);
+			continue;
+		}
+		if(isNodeHigh(n[i])) {
+			ctx.fillStyle = 'rgba(255,0,0,0.7)';
+		} else {
+			ctx.fillStyle = 'rgba(255,255,255,0.7)';
+		}
 		var segs = nodes[n[i]].segs;
 		for(var s in segs){drawSeg(ctx, segs[s]); ctx.fill();}
 	}
 }
 
+// highlight a single transistor (additively - does not clear highlighting)
+function hiliteTrans(n){
+	var ctx = hilite.getContext('2d');
+	ctx.strokeStyle = 'rgba(255,255,255,0.7)';
+	ctx.lineWidth = 4
+	for(var t in n){
+		var bb = transistors[n[t]].bb
+		var segs = [[bb[0], bb[2], bb[1], bb[2], bb[1], bb[3], bb[0], bb[3]]] 
+		for(var s in segs){drawSeg(ctx, segs[s]); ctx.stroke();}
+	}
+}
+
+function ctxDrawBox(ctx, xMin, yMin, xMax, yMax){
+	var cap=ctx.lineCap;
+	ctx.lineCap="square";
+	ctx.beginPath();
+	ctx.moveTo(xMin, yMin);
+	ctx.lineTo(xMin, yMax);
+	ctx.lineTo(xMax, yMax);
+	ctx.lineTo(xMax, yMin);
+	ctx.lineTo(xMin, yMin);
+	ctx.stroke();
+	ctx.lineCap=cap;
+}
+
+// takes a bounding box in chip coords and centres the display over it
+function zoomToBox(xmin,xmax,ymin,ymax){
+	var xmid=(xmin+xmax)/2;
+	var ymid=(ymin+ymax)/2;
+	var x=(xmid+grChipOffsetX)/grChipSize*600;
+	var y=600-(ymid-grChipOffsetY)/grChipSize*600;
+	// Zoom to fill 80% of the window with the selection
+	var fillfactor=0.80;
+	var dx=xmax-xmin;
+	var dy=ymax-ymin;
+	if (dx < 1) dx=1;
+	if (dy < 1) dy=1;
+	var zx=(800/600)*fillfactor*grChipSize/dx;
+	var zy=fillfactor*grChipSize/dy;
+	var zoom=Math.min(zx,zy);
+	if (zoom < 1) {
+		zoom = 1;
+	}
+	if (zoom > grMaxZoom) {
+		zoom = grMaxZoom;
+	}
+	moveHere([x,y,zoom]);
+}
 
 function drawSeg(ctx, seg){
-	if(noGraphics) return;
-	var dx = 400;
+	var dx = grChipOffsetX;
+	var dy = grChipOffsetY;
 	ctx.beginPath();
-	ctx.moveTo(seg[0]+dx, 10000-seg[1])
-	for(var i=2;i<seg.length;i+=2) ctx.lineTo(seg[i]+dx, 10000-seg[i+1]);
-	ctx.lineTo(seg[0]+dx, 10000-seg[1])
-}
-
-/////////////////////////
-//
-// User Interface
-//
-/////////////////////////
-
-function handleKey(e){
-	var c = e.charCode;
-	c = String.fromCharCode(c);
-	if('<>?np'.indexOf(c)==-1) return;
-	if(c=='<' && zoom>1) setZoom(zoom/1.2);
-	else if(c=='>' && zoom<16) setZoom(zoom*1.2);
-	else if(c=='?') setZoom(1);
-	else if(c=='n') stepForward();
-	else if(c=='p') stepBack();
-}
-
-function mouseDown(e){
-	e.preventDefault();
-	moved=false;	
-	dragMouseX = e.clientX;	
-	dragMouseY = e.clientY;
-	window.onmousemove = function(e){mouseMove(e)};
-	window.onmouseup = function(e){mouseUp(e)};
-}
-
-function mouseMove(e){
-	moved = true;
-	if(zoom==1) return;
-	var dx = e.clientX-dragMouseX;
-	var dy = e.clientY-dragMouseY;
-	dragMouseX = e.clientX;
-	dragMouseY = e.clientY;
-	centerx-=dx/zoom;
-	centerx = Math.max(centerx, 400/zoom);
-	centerx = Math.min(centerx, 600-400/zoom);
-	centery-=dy/zoom;
-	centery = Math.max(centery, 300/zoom);
-	centery = Math.min(centery, 600-300/zoom);
-	recenter();
-}
-
-function mouseUp(e){
-	if(!moved) handleClick(e);	
-	window.onmousemove = undefined;
-	window.onmouseup = undefined;
-}
-
-function setZoom(n){
-	zoom = n;
-	setChipStyle({
-		width: 600*n+'px',
-		height: 600*n+'px'
-	});
-	recenter();
-}
-
-function recenter(){
-	var top = -centery*zoom+300;
-	top = Math.min(top, 0);
-	top = Math.max(top, -600*(zoom-1));
-	var left = -centerx*zoom+400;
-	left = Math.min(left, 0);
-	left = Math.max(left, (zoom==1)?100:-600*zoom+800);
-	setChipStyle({
-		top: top+'px',
-		left: left+'px',
-	});
-}
-
-function handleClick(e){
-	var x = localx(hilite, e.clientX)/zoom;
-	var y = localy(hilite, e.clientY)/zoom;
-	var w = findNodeNumber(x,y);
-	if(e.shiftKey) hiliteNode(getNodeGroup(w));
-	else {var a=new Array(); a.push(w); hiliteNode(a);}
-	var cx = Math.round(x*10000/600);
-	var cy = Math.round(y*10000/600);	
-	if(w==-1) setStatus('x:',cx,'<br>','y:',cy);
-	else {setStatus('x:',cx, 'y:', cy,'<br>','node:',w, nodeName(w));}
+	ctx.moveTo(grScale(seg[0]+dx), grScale(grChipSize-seg[1]+dy));
+	for(var i=2;i<seg.length;i+=2) ctx.lineTo(grScale(seg[i]+dx), grScale(grChipSize-seg[i+1]+dy));
+	ctx.lineTo(grScale(seg[0]+dx), grScale(grChipSize-seg[1]+dy));
 }
 
 function findNodeNumber(x,y){
 	var ctx = hitbuffer.getContext('2d');
-	var pixels = ctx.getImageData(x*4000/600, y*4000/600, 2, 2).data;
+	var pixels = ctx.getImageData(x*grCanvasSize/600, y*grCanvasSize/600, 2, 2).data;
 	if(pixels[0]==0) return -1;
 	var high = pixels[0]>>4;
 	var mid = pixels[1]>>4;
@@ -313,27 +243,23 @@ function findNodeNumber(x,y){
 	return (high<<8)+(mid<<4)+low;
 }
 
+function clearHighlight(){
+	// remove red/white overlay according to logic value
+	// for easier layout navigation
+	ctx.clearRect(0,0,grCanvasSize,grCanvasSize);
+}
+
 function updateShow(layer, on){
 	drawlayers[layer]=on;
 	setupBackground();
 }
 
-/////////////////////////
-//
-// Etc.
-//
-/////////////////////////
-
-function setChipStyle(props){
-	for(var i in props){
-		chipbg.style[i] = props[i];
-		overlay.style[i] = props[i];
-		hilite.style[i] = props[i];
-		hitbuffer.style[i] = props[i];
-	}
+// we draw the chip data scaled down to the canvas
+// and so avoid scaling a large canvas
+function grScale(x){
+	return Math.round(x*grCanvasSize/grChipSize);
 }
 
-
 function localx(el, gx){
 	return gx-el.getBoundingClientRect().left;
 }
@@ -344,10 +270,20 @@ function localy(el, gy){
 
 function setStatus(){
 	var res = '';
-	for(var i=0;i<arguments.length;i++) res=res+arguments[i]+' ';
+	// pad the arguments to make this a three-line display
+	// there must be a clean way to do this
+	if(arguments[1]==undefined)arguments[1]="";
+	if(arguments[2]==undefined)arguments[2]="";
+	arguments.length=3;
+	for(var i=0;i<arguments.length;i++) res=res+arguments[i]+'<br>';
 	statbox.innerHTML = res;
 }
 
+function setupNodeNameList(){
+	for(var i in nodenames)
+		nodenamelist.push(i);
+}
+
 function nodeName(n) {
 	for(var i in nodenames){
 		if(nodenames[i]==n) return i;