Merge branch 'ed'

Conflicts:

	segdefs.js

.gitattributes

@@ -0,0 +1,4 @@
+* text=auto
+*.js text
+*.css text
+*.html text

.gitignore

@@ -0,0 +1,5 @@
+# emacs-style backup files
+*~
+# patch detritus
+*.orig
+*.rej

README

@@ -0,0 +1,8 @@
+This is the javascript simulator from the visual5602.org project.
+
+It includes a general purpose switch-level simulator, layout browser,
+and data from a 6502D chip. 
+
+Please note the various licenses of the different files.
+
+Enjoy!

chipsim.js

@@ -1,208 +1,210 @@
-/*
- 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 ctrace = false;
-var ridx = 0;
-
-function recalcNodeList(list){
-	var n = list[0];
-	var recalclist = 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);
-		list = recalclist;
-		recalclist = new Array();
-	}
-	console.log(n,'looping...');
-}
-
-function recalcNode(node, recalclist){
-	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);
-	}
-}
-
-function recalcTransistor(tn, recalclist){
-	var t = transistors[tn];
-	if(isNodeHigh(t.gate)) turnTransistorOn(t, recalclist);
-	else turnTransistorOff(t, recalclist);
-}
-
-function turnTransistorOn(t, recalclist){
-	if(t.on) return;
-	if(ctrace) console.log(t.name, 'on', t.gate, t.c1, t.c2);
-	t.on = true;
-	addRecalcNode(t.c1, recalclist);
-	addRecalcNode(t.c2, recalclist);
-}
-
-function turnTransistorOff(t, recalclist){
-	if(!t.on) return;
-	if(ctrace) 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);
-}
-
-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 getNodeGroup(i){
-	var group = new Array();
-	addNodeToGroup(i, group);
-	return group;
-}
-
-function addNodeToGroup(i, group){
-	if(arrayContains(group, i)) 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);
-}
-
-
-function getNodeValue(group){
-	if(arrayContains(group, ngnd)) return 'gnd';
-	if(arrayContains(group, npwr)) return 'vcc';
-	var flstate;
-	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(flstate==undefined) console.log(group);
-	return flstate;
-}
-
-
-function isNodeHigh(nn){
-	return arrayContains(['vcc','pu','fh'], nodes[nn].state);
-}
-
-function saveString(name, str){
-	var request = new XMLHttpRequest();
-	request.onreadystatechange=function(){};
-	request.open('PUT', 'save.php?name='+name, true);
-	request.setRequestHeader('Content-Type', 'text/plain');
-	request.send(str);
-}
-
-function allNodes(){
-	var res = new Array();
-	for(var i in nodes) if((i!=npwr)&&(i!=ngnd)) res.push(i);
-	return res;
-}
-
-function stateString(){
-	var codes = {gnd: 'g', vcc: 'v', pu: 'p', pd: 'd', fh: 'f', fl: 'l'};
-	var res = '';
-	for(var i=0;i<1725;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];
-	}
-	return res;
-}
-
-function showState(str){
-	var codes = {g: 'gnd', v: 'vcc', p: 'pu', d: 'pd', f: 'fh', l: 'fl'};
-	for(var i=0;i<str.length;i++){
-		if(str[i]=='x') continue;
-		nodes[i].state = codes[str[i]];
-		var gates = nodes[i].gates;
-		for(var t in gates) transistors[gates[t]].on = isNodeHigh(i);
-	}
-	refresh();
-}
-
-
-function setPd(name){
-	var nn = nodenames[name];
-	nodes[nn].pullup = false;
-	nodes[nn].pulldown = true;
-}
-
-function setHigh(name){
-	var nn = nodenames[name];
-	nodes[nn].pullup = true;
-	nodes[nn].pulldown = false;
-	recalcNodeList([nn]);
-}
-
-function setLow(name){
-	var nn = nodenames[name];
-	nodes[nn].pullup = false;
-	nodes[nn].pulldown = true;
-	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;}
+/*
+ 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 ctrace = false;
+var noGraphics = false;
+var loglevel = 3;
+var ridx = 0;
+
+function recalcNodeList(list){
+	var n = list[0];
+	var recalclist = 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);
+		list = recalclist;
+		recalclist = new Array();
+	}
+	console.log(n,'looping...');
+}
+
+function recalcNode(node, recalclist){
+	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);
+	}
+}
+
+function recalcTransistor(tn, recalclist){
+	var t = transistors[tn];
+	if(isNodeHigh(t.gate)) turnTransistorOn(t, recalclist);
+	else turnTransistorOff(t, recalclist);
+}
+
+function turnTransistorOn(t, recalclist){
+	if(t.on) return;
+	if(ctrace) console.log(t.name, 'on', t.gate, t.c1, t.c2);
+	t.on = true;
+	addRecalcNode(t.c1, recalclist);
+	addRecalcNode(t.c2, recalclist);
+}
+
+function turnTransistorOff(t, recalclist){
+	if(!t.on) return;
+	if(ctrace) 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);
+}
+
+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 getNodeGroup(i){
+	var group = new Array();
+	addNodeToGroup(i, group);
+	return group;
+}
+
+function addNodeToGroup(i, group){
+	if(arrayContains(group, i)) 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);
+}
+
+
+function getNodeValue(group){
+	if(arrayContains(group, ngnd)) return 'gnd';
+	if(arrayContains(group, npwr)) return 'vcc';
+	var flstate;
+	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(flstate==undefined) console.log(group);
+	return flstate;
+}
+
+
+function isNodeHigh(nn){
+	return arrayContains(['vcc','pu','fh'], nodes[nn].state);
+}
+
+function saveString(name, str){
+	var request = new XMLHttpRequest();
+	request.onreadystatechange=function(){};
+	request.open('PUT', 'save.php?name='+name, true);
+	request.setRequestHeader('Content-Type', 'text/plain');
+	request.send(str);
+}
+
+function allNodes(){
+	var res = new Array();
+	for(var i in nodes) if((i!=npwr)&&(i!=ngnd)) res.push(i);
+	return res;
+}
+
+function stateString(){
+	var codes = {gnd: 'g', vcc: 'v', pu: 'p', pd: 'd', fh: 'f', fl: 'l'};
+	var res = '';
+	for(var i=0;i<1725;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];
+	}
+	return res;
+}
+
+function showState(str){
+	var codes = {g: 'gnd', v: 'vcc', p: 'pu', d: 'pd', f: 'fh', l: 'fl'};
+	for(var i=0;i<str.length;i++){
+		if(str[i]=='x') continue;
+		nodes[i].state = codes[str[i]];
+		var gates = nodes[i].gates;
+		for(var t in gates) transistors[gates[t]].on = isNodeHigh(i);
+	}
+	refresh();
+}
+
+
+function setPd(name){
+	var nn = nodenames[name];
+	nodes[nn].pullup = false;
+	nodes[nn].pulldown = true;
+}
+
+function setHigh(name){
+	var nn = nodenames[name];
+	nodes[nn].pullup = true;
+	nodes[nn].pulldown = false;
+	recalcNodeList([nn]);
+}
+
+function setLow(name){
+	var nn = nodenames[name];
+	nodes[nn].pullup = false;
+	nodes[nn].pulldown = true;
+	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;}

index.html

@@ -1,36 +1,64 @@
-<!DOCTYPE html>
-
-<head>
-<title>6502</title>
-<style type="text/css">@import "wires.css";</style>
-<script src="segdefs.js"></script>
-<script src="transdefs.js"></script>
-<script src="nodenames.js"></script>
-<script src="wires.js"></script>
-<script src="chipsim.js"></script>
-<script src="memtable.js"></script>
-<script src="macros.js"></script>
-</head>
-
-<body onload="setup();">
-<p class="title">The 6502</p>
-<div class="frame" id="frame">
-<div class="chip">
-<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 class = "buttons">
-<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: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>
-</div>
-<p class="status" id="status">x: 0<br>y: 0</p>
-<table class="memtable" id="memtable"></table>
-</div>
-</body>
-
-</html>
+<!DOCTYPE html>
+
+<head>
+<title>6502</title>
+<style type="text/css">@import "wires.css";</style>
+<script src="segdefs.js"></script>
+<script src="transdefs.js"></script>
+<script src="nodenames.js"></script>
+<script src="wires.js"></script>
+<script src="chipsim.js"></script>
+<script src="memtable.js"></script>
+<script src="macros.js"></script>
+</head>
+
+<body onload="setTimeout(setup,200)">
+<br />
+<span id="title"><a href="/">The Visual 6502</a></span><br /><br />
+<span id="plain">
+If the chip does not load, try another browser: Chrome, Safari, or Firefox
+<br />
+<br />
+Hit '>' to zoom in, '<' to zoom out
+<br />
+Right-click to scroll around
+<br />
+Enter your own program into the array of RAM
+<br />
+<br /> 
+</span>
+<div class="frame" id="frame">
+<div class="chip">
+<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 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>
+  </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>
+  </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)" />(diff)
+  <input type="checkbox" name="2" id="updateShow2" onchange="updateShow(this.name,this.checked)" />(diode)
+  <input type="checkbox" name="3" id="updateShow3" onchange="updateShow(this.name,this.checked)" />(diff0)
+  <input type="checkbox" name="4" id="updateShow4" onchange="updateShow(this.name,this.checked)" />(diff1)
+  <input type="checkbox" name="5" id="updateShow5" onchange="updateShow(this.name,this.checked)" />(poly)
+</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 />
+<br />
+</body>
+</html>

macros.js

@@ -1,201 +1,295 @@
-/*
- 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 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 running = false;
-
-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 steps(){
-	if(running) step();
-	setTimeout(steps, 200);
-}
-
-function initChip(){
-	for(var nn in nodes) nodes[nn].state = 'fl';
-	nodes[ngnd].state = 'gnd';
-	nodes[npwr].state = 'vcc';
-	for(var tn in transistors) transistors[tn].on = false;
-	setLow('res');
-	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<14;i++){step();}
-	refresh();
-	cycle = 0;
-	trace = Array();
-	chipStatus();
-}
-
-function step(){
-	trace[cycle]= {chip: stateString(), mem: getMem()};
-	halfStep();
-	cycle++;
-	chipStatus();
-}
-
-function halfStep(){
-	var clk = isNodeHigh(nodenames['clk0']);
-	if (clk) {setLow('clk0'); handleBusRead(); } 
-	else {setHigh('clk0'); handleBusWrite();}
-	refresh();
-}
-
-function handleBusRead(){
-	if(isNodeHigh(nodenames['rw'])) writeDataBus(mRead(readAddressBus()));
-}
-
-function handleBusWrite(){
-	if(!isNodeHigh(nodenames['rw'])){
-		var a = readAddressBus();
-		var d = readDataBus();
-		mWrite(a,d);
-		if(a<0x200) setCellValue(a,d);
-	}
-}
-
-function readAddressBus(){return readBits('ab', 16);}
-function readDataBus(){return readBits('db', 8);}
-function readA(){return readBits('a', 8);}
-function readY(){return readBits('y', 8);}
-function readX(){return readBits('x', 8);}
-function readP(){return readBits('p', 8);}
-function readSP(){return readBits('s', 8);}
-
-function readBits(name, n){
-	var res = 0;
-	for(var i=0;i<n;i++){
-		var nn = nodenames[name+i];
-		res+=((isNodeHigh(nn))?1:0)<<i;
-	}
-	return res;
-}
-
-function writeDataBus(x){
-	var recalcs = Array();
-	for(var i=0;i<8;i++){
-		var nn = nodenames['db'+i];
-		var n = nodes[nn];
-		if((x%2)==0) {n.pulldown=true; n.pullup=false;}
-		else {n.pulldown=false; n.pullup=true;}
-		recalcs.push(nn);
-		x>>=1;
-	}
-	recalcNodeList(recalcs);
-}
-
-function mRead(a){
-	if(memory[a]==undefined) return 0;
-	else return memory[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]];
-		if(t.c1==npwr) res.push(t.c2);
-		if(t.c2==npwr) res.push(t.c1);
-	}
-	hiliteNode(res);
-}
-
-function runChip(){
-	var start = document.getElementById('start');
-	var stop = document.getElementById('stop');
-	start.style.visibility = 'hidden';
-	stop.style.visibility = 'visible';
-	running = true;
-}
-
-function stopChip(){
-	var start = document.getElementById('start');
-	var stop = document.getElementById('stop');
-	start.style.visibility = 'visible';
-	stop.style.visibility = 'hidden';
-	running = false;
-}
-
-function resetChip(){
-	stopChip();
-	initChip();
-}
-
-function stepForward(){
-	stopChip();
-	step();
-}
-
-function stepBack(){
-	if(cycle==0) return;
-	showState(trace[--cycle].chip);
-	setMem(trace[cycle].mem);
-	var clk = isNodeHigh(nodenames['clk0']);
-	if(!clk) writeDataBus(mRead(readAddressBus()));
-	chipStatus();
-}
-
-function chipStatus(){
-	var pc = readAddressBus();
-	setStatus('PC:', hexWord(pc),
-	          'D:', hexByte(readDataBus()), 
-	          'SP:',hexByte(readSP()),
-	          'cycle:', cycle, '<br>',
-	          'A:', hexByte(readA()),
-	          'X:', hexByte(readX()),
-	          'Y:', hexByte(readY()),
-	          'P:', hexByte(readP())
-	          );
-	selectCell(pc);
-}
-
-function getMem(){
-	var res = Array();
-	for(var i=0;i<0x200;i++) res.push(mRead(i));
-	return res;
-}
-
-function setMem(arr){
-	for(var i=0;i<0x200;i++){mWrite(i, arr[i]); setCellValue(i, arr[i]);}
-}
-
-function hexWord(n){return (0x10000+n).toString(16).substring(1)}
-function hexByte(n){return (0x100+n).toString(16).substring(1)}
+/*
+ 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 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 running = false;
+
+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 steps(){
+	if(running) {
+           step();
+	   setTimeout(steps, 0); // schedule the next poll
+        }
+}
+
+function testNMI(n){
+        initChip();
+
+        mWrite(0x0000, 0x38); // set carry
+        mWrite(0x0001, 0x4c); // jump to test code
+        mWrite(0x0002, 0x06);
+        mWrite(0x0003, 0x23);
+
+        mWrite(0x22ff, 0x38); // set carry
+        mWrite(0x2300, 0xea);
+        mWrite(0x2301, 0xea);
+        mWrite(0x2302, 0xea);
+        mWrite(0x2303, 0xea);
+        mWrite(0x2304, 0xb0); // branch carry set to self
+        mWrite(0x2305, 0xfe);
+
+        mWrite(0x2306, 0xb0); // branch carry set to self
+        mWrite(0x2307, 0x01);
+        mWrite(0x2308, 0x00); // brk should be skipped
+        mWrite(0x2309, 0xa9); // anything
+        mWrite(0x230a, 0xde); // anything
+        mWrite(0x230b, 0xb0); // branch back with page crossing
+        mWrite(0x230c, 0xf2);
+
+        mWrite(0xc018, 0x40); // nmi handler
+
+        mWrite(0xfffa, 0x18); // nmi vector
+        mWrite(0xfffb, 0xc0);
+        mWrite(0xfffc, 0x00); // reset vector
+        mWrite(0xfffd, 0x00);
+
+        for(var i=0;i<n;i++){step();}
+        setLow('nmi');
+        chipStatus();
+        for(var i=0;i<8;i++){step();}
+        setHigh('nmi');
+        chipStatus();
+        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 tn in transistors) transistors[tn].on = false;
+	setLow('res');
+	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();}
+	refresh();
+	cycle = 0;
+	trace = Array();
+	chipStatus();
+	console.log('initChip done after', now()-start);
+}
+
+function step(){
+	trace[cycle]= {chip: stateString(), mem: getMem()};
+	halfStep();
+	cycle++;
+	chipStatus();
+}
+
+function halfStep(){
+	var clk = isNodeHigh(nodenames['clk0']);
+	if (clk) {setLow('clk0'); handleBusRead(); } 
+	else {setHigh('clk0'); handleBusWrite();}
+	refresh();
+}
+
+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()));
+}
+
+function handleBusWrite(){
+	if(!isNodeHigh(nodenames['rw'])){
+		var a = readAddressBus();
+		var d = readDataBus();
+		mWrite(a,d);
+		if(a<0x200) setCellValue(a,d);
+	}
+}
+
+function readAddressBus(){return readBits('ab', 16);}
+function readDataBus(){return readBits('db', 8);}
+function readA(){return readBits('a', 8);}
+function readY(){return readBits('y', 8);}
+function readX(){return readBits('x', 8);}
+function readP(){return readBits('p', 8);}
+function readPstring(){
+   var result;
+   result = (isNodeHigh(nodenames['p7'])?'N':'n') +
+            (isNodeHigh(nodenames['p6'])?'V':'v') +
+            '-' +
+            (isNodeHigh(nodenames['p3'])?'B':'b') +
+            (isNodeHigh(nodenames['p3'])?'D':'d') +
+            (isNodeHigh(nodenames['p2'])?'I':'i') +
+            (isNodeHigh(nodenames['p1'])?'Z':'z') +
+            (isNodeHigh(nodenames['p0'])?'C':'c');
+   return result;
+}
+function readSP(){return readBits('s', 8);}
+function readPC(){return (readBits('pch', 8)<<8) + readBits('pcl', 8);}
+function readPCL(){return readBits('pcl', 8);}
+function readPCH(){return readBits('pch', 8);}
+
+function readBit(name){
+        return isNodeHigh(nodenames[name])?1:0;
+}
+function readBits(name, n){
+	var res = 0;
+	for(var i=0;i<n;i++){
+		var nn = nodenames[name+i];
+		res+=((isNodeHigh(nn))?1:0)<<i;
+	}
+	return res;
+}
+
+function writeDataBus(x){
+	var recalcs = Array();
+	for(var i=0;i<8;i++){
+		var nn = nodenames['db'+i];
+		var n = nodes[nn];
+		if((x%2)==0) {n.pulldown=true; n.pullup=false;}
+		else {n.pulldown=false; n.pullup=true;}
+		recalcs.push(nn);
+		x>>=1;
+	}
+	recalcNodeList(recalcs);
+}
+
+function mRead(a){
+	if(memory[a]==undefined) return 0;
+	else return memory[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]];
+		if(t.c1==npwr) res.push(t.c2);
+		if(t.c2==npwr) res.push(t.c1);
+	}
+	hiliteNode(res);
+}
+
+function runChip(){
+	var start = document.getElementById('start');
+	var stop = document.getElementById('stop');
+	start.style.visibility = 'hidden';
+	stop.style.visibility = 'visible';
+	running = true;
+        steps();
+}
+
+function stopChip(){
+	var start = document.getElementById('start');
+	var stop = document.getElementById('stop');
+	start.style.visibility = 'visible';
+	stop.style.visibility = 'hidden';
+	running = false;
+}
+
+function resetChip(){
+	stopChip();
+        setStatus('resetting 6502...');                          
+	setTimeout(initChip,0);
+}
+
+function stepForward(){
+	stopChip();
+	step();
+}
+
+function stepBack(){
+	if(cycle==0) return;
+	showState(trace[--cycle].chip);
+	setMem(trace[cycle].mem);
+	var clk = isNodeHigh(nodenames['clk0']);
+	if(!clk) writeDataBus(mRead(readAddressBus()));
+	chipStatus();
+}
+
+function chipStatus(){
+	var ab = readAddressBus();
+	var machine1 =
+	        ' halfcyc:' + cycle +
+	        ' phi0:' + readBit('clk0') +
+                ' AB:' + hexWord(ab) +
+	        ' D:' + hexByte(readDataBus()) +
+	        ' RnW:' + readBit('rw');
+	var machine2 =
+	        ' PC:' + hexWord(readPC()) +
+	        ' A:' + hexByte(readA()) +
+	        ' X:' + hexByte(readX()) +
+	        ' 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) {
+		console.log(machine1 + " " + machine2 + " " + machine3 + " " + machine4 + " " + machine5);
+	}
+	selectCell(ab);
+}
+
+function getMem(){
+	var res = Array();
+	for(var i=0;i<0x200;i++) res.push(mRead(i));
+	return res;
+}
+
+function setMem(arr){
+	for(var i=0;i<0x200;i++){mWrite(i, arr[i]); setCellValue(i, arr[i]);}
+}
+
+function hexWord(n){return (0x10000+n).toString(16).substring(1)}
+function hexByte(n){return (0x100+n).toString(16).substring(1)}

memtable.js

@@ -1,89 +1,89 @@
-/*
- 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 table;
-var selected;
-
-function setupTable(){
-	table = document.getElementById('memtable');
-	for(var r=0;r<32;r++){
-		var row = document.createElement('tr');
-		table.appendChild(row);
-		var col = document.createElement('td');
-		col.appendChild(document.createTextNode(hexWord(r*16)+':'));
-		col.onmousedown = unselectCell;
-		row.appendChild(col);
-		for(var c=0;c<16;c++){
-			col = document.createElement('td');
-			col.addr = r*16+c;
-			col.val = 0;
-			col.onmousedown = function(e){handleCellClick(e);};
-			col.appendChild(document.createTextNode('00'));
-			row.appendChild(col);
-		}
-	}
-}
-
-function handleCellClick(e){
-	var c = e.target;
-	selectCell(c.addr);
-}
-
-function cellKeydown(e){
-	var c = e.keyCode;
-	if(c==13) unselectCell();
-	else if(c==32) selectCell((selected+1)%0x200);
-	else if(c==8) selectCell((selected+0x1ff)%0x200);
-	else if((c>=48)&&(c<58)) setCellValue(selected, getCellValue(selected)*16+c-48);
-	else if((c>=65)&&(c<71)) setCellValue(selected, getCellValue(selected)*16+c-55);
-	mWrite(selected, getCellValue(selected));
-}
-
-function setCellValue(n, val){
-	val%=256; 
-	cellEl(n).val=val;
-	cellEl(n).innerHTML=hexByte(val);
-}
-
-function getCellValue(n){return cellEl(n).val;}
-
-function selectCell(n){
-	unselectCell();
-	if(n>=0x200) return;
-	cellEl(n).style.background = '#ff8';
-	selected = n;
-	window.onkeydown = function(e){cellKeydown(e);};
-}
-
-function unselectCell(){
-	if(selected==undefined) return;
-	cellEl(selected).style.background = '#fff';
-	selected = undefined;
-	window.onkeydown = undefined;
-}
-
-function cellEl(n){
-	var r = n>>4;
-	var c = n%16;
-	var e = table.children[r].children[c+1];
-	return e;
-}
+/*
+ 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 table;
+var selected;
+
+function setupTable(){
+	table = document.getElementById('memtable');
+	for(var r=0;r<32;r++){
+		var row = document.createElement('tr');
+		table.appendChild(row);
+		var col = document.createElement('td');
+		col.appendChild(document.createTextNode(hexWord(r*16)+':'));
+		col.onmousedown = unselectCell;
+		row.appendChild(col);
+		for(var c=0;c<16;c++){
+			col = document.createElement('td');
+			col.addr = r*16+c;
+			col.val = 0;
+			col.onmousedown = function(e){handleCellClick(e);};
+			col.appendChild(document.createTextNode('00'));
+			row.appendChild(col);
+		}
+	}
+}
+
+function handleCellClick(e){
+	var c = e.target;
+	selectCell(c.addr);
+}
+
+function cellKeydown(e){
+	var c = e.keyCode;
+	if(c==13) unselectCell();
+	else if(c==32) selectCell((selected+1)%0x200);
+	else if(c==8) selectCell((selected+0x1ff)%0x200);
+	else if((c>=48)&&(c<58)) setCellValue(selected, getCellValue(selected)*16+c-48);
+	else if((c>=65)&&(c<71)) setCellValue(selected, getCellValue(selected)*16+c-55);
+	mWrite(selected, getCellValue(selected));
+}
+
+function setCellValue(n, val){
+	val%=256; 
+	cellEl(n).val=val;
+	cellEl(n).innerHTML=hexByte(val);
+}
+
+function getCellValue(n){return cellEl(n).val;}
+
+function selectCell(n){
+	unselectCell();
+	if(n>=0x200) return;
+	cellEl(n).style.background = '#ff8';
+	selected = n;
+	window.onkeydown = function(e){cellKeydown(e);};
+}
+
+function unselectCell(){
+	if(selected==undefined) return;
+	cellEl(selected).style.background = '#fff';
+	selected = undefined;
+	window.onkeydown = undefined;
+}
+
+function cellEl(n){
+	var r = n>>4;
+	var c = n%16;
+	var e = table.children[r].children[c+1];
+	return e;
+}

nodenames.js

@@ -1,117 +1,209 @@
-/*
- 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 nodenames ={
-db1: 82,
-db0: 1005,
-db3: 650,
-db2: 945,
-db5: 175,
-db4: 1393,
-db7: 1349,
-db6: 1591,
-a1: 1234,
-ab1: 451,
-ab2: 1340,
-a2: 978,
-s2: 81,
-a5: 858,
-a4: 727,
-a7: 1653,
-a6: 1136,
-so: 1672,
-sync: 539,
-vcc: 657,
-clk1out: 1163,
-p2: 1421,
-p3: 439,
-p0: 687,
-p1: 1444,
-p6: 77,
-p7: 1370,
-p4: 1119,
-p5: 0,
-pcl3: 1359,
-pcl2: 655,
-pcl1: 1022,
-pcl0: 1139,
-pcl7: 1611,
-pcl6: 377,
-pcl5: 622,
-pcl4: 900,
-clk0: 1171,
-s3: 1532,
-res: 159,
-s1: 183,
-s0: 1403,
-s7: 1435,
-s6: 1212,
-s5: 1098,
-s4: 1702,
-rw: 1156,
-x2: 1,
-x3: 1648,
-x0: 1216,
-x1: 98,
-x6: 448,
-x7: 777,
-x4: 85,
-x5: 589,
-rdy: 89,
-clk2out: 421,
-nmi: 1297,
-ab12: 1237,
-ab13: 349,
-ab10: 1443,
-ab11: 399,
-ab14: 672,
-ab15: 195,
-ab0: 268,
-a0: 737,
-a3: 162,
-ab3: 211,
-ab4: 435,
-ab5: 736,
-ab6: 887,
-ab7: 1493,
-ab8: 230,
-ab9: 148,
-pch7: 205,
-pch6: 1551,
-pch5: 49,
-pch4: 948,
-pch3: 584,
-pch2: 502,
-pch1: 292,
-pch0: 1670,
-irq: 103,
-vss: 558,
-y1: 1148,
-y0: 64,
-y3: 305,
-y2: 573,
-y5: 615,
-y4: 989,
-y7: 843,
-y6: 115,
-cclk: 943
-}
+/*
+ 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 nodenames ={
+db1: 82,
+db0: 1005,
+db3: 650,
+db2: 945,
+db5: 175,
+db4: 1393,
+db7: 1349,
+db6: 1591,
+idl0: 116,
+idl1: 576,
+idl2: 1485,
+idl3: 1284,
+idl4: 1516,
+idl5: 498,
+idl6: 1537,
+idl7: 529,
+a1: 1234,
+ab1: 451,
+ab2: 1340,
+a2: 978,
+s2: 81,
+a5: 858,
+a4: 727,
+a7: 1653,
+a6: 1136,
+so: 1672,
+sync: 539,
+vcc: 657,
+clk1out: 1163,
+p2: 1421,
+p3: 439,
+p0: 687,
+p1: 1444,
+p6: 77,
+p7: 1370,
+p4: 1119,
+p5: 0,
+pcl3: 1359,
+pcl2: 655,
+pcl1: 1022,
+pcl0: 1139,
+pcl7: 1611,
+pcl6: 377,
+pcl5: 622,
+pcl4: 900,
+clk0: 1171,
+s3: 1532,
+res: 159,
+s1: 183,
+s0: 1403,
+s7: 1435,
+s6: 1212,
+s5: 1098,
+s4: 1702,
+nots0: 418,
+nots1: 1064,
+nots2: 752,
+nots3: 828,
+nots4: 1603,
+nots5: 601,
+nots6: 1029,
+nots7: 181,
+rw: 1156,
+x2: 1,
+x3: 1648,
+x0: 1216,
+x1: 98,
+x6: 448,
+x7: 777,
+x4: 85,
+x5: 589,
+rdy: 89,
+clk2out: 421,
+nmi: 1297,
+ab12: 1237,
+ab13: 349,
+ab10: 1443,
+ab11: 399,
+ab14: 672,
+ab15: 195,
+ab0: 268,
+a0: 737,
+a3: 162,
+ab3: 211,
+ab4: 435,
+ab5: 736,
+ab6: 887,
+ab7: 1493,
+ab8: 230,
+ab9: 148,
+pch7: 205,
+pch6: 1551,
+pch5: 49,
+pch4: 948,
+pch3: 584,
+pch2: 502,
+pch1: 292,
+pch0: 1670,
+irq: 103,
+vss: 558,
+y1: 1148,
+y0: 64,
+y3: 305,
+y2: 573,
+y5: 615,
+y4: 989,
+y7: 843,
+y6: 115,
+cclk: 943,   // aka cp2
+clock1: 156,
+clock2: 1536,
+notir7: 1320,
+notir6: 895,   // OK
+notir5: 1394,  // OK
+notir4: 26,
+notir3: 1125,  
+notir2: 1182,  
+notir1: 702,
+notir0: 194,
+t2: 971,
+t3: 1567,
+t4: 690,
+t5: 909,
+cp1: 710,
+fetch: 879,
+clearIR: 1077,
+D1x1: 827,
+notRdy0: 248,
+alu0: 394,
+alu1: 697,
+alu2: 276,
+alu3: 495,
+alu4: 1490,
+alu5: 893,
+alu6: 68,
+alu7: 1123,
+adl0: 413,
+adl1: 1282,
+adl2: 1242,
+adl3: 684,
+adl4: 1437,
+adl5: 1630,
+adl6: 121,
+adl7: 1299,
+adh0: 407,
+adh1: 52,
+adh2: 1651,
+adh3: 315,
+adh4: 1160,
+adh5: 483,
+adh6: 13,
+adh7: 1539,
+sb0: 54,
+sb1: 1150,
+sb2: 1287,
+sb3: 1188,
+sb4: 1405,
+sb5: 166,
+sb6: 1336,
+sb7: 1001,
+idb0: 1108,
+idb1: 991,
+idb2: 1473,
+idb3: 1302,
+idb4: 892,
+idb5: 1503,
+idb6: 833,
+idb7: 493,
+dor0: 222,
+dor1: 527,
+dor2: 1288,
+dor3: 823,
+dor4: 873,
+dor5: 1266,
+dor6: 1418,
+dor7: 158,
+pd0: 758,
+pd1: 361,
+pd2: 955,
+pd3: 894,
+pd4: 369,
+pd5: 829,
+pd6: 1669,
+pd7: 1690,
+h1x1: 1042, // drive status byte onto databus
+}

save.php

@@ -1,18 +1,18 @@
-<?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 $bytes;
-	}
-
-	return false;
-}
-
-?>
-
+<?php
+
+$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;
+}
+
+?>
+

wires.css

@@ -1,68 +1,88 @@
-body {
- background: white;
- color: black;
- font-family: cursive;
- font-size: 30px;
-}
-
-div.frame {
- margin-left: 10px;
- position: relative;
- width: 1150px;
- height: 600px;
-}
-
-div.chip {
- background: lightgray;
- border: 2px solid gray;
- position: absolute;
- width: 800px;
- height: 600px;
- overflow: hidden;
-}
-
-canvas.chip {
- position: absolute;
- width: 600px;
- height: 600px;
-}
-
-div.buttons{
- position: absolute;
- top: -5px;
- left: 820px;
-}
-
-p.status {
- position: absolute;
- left: 820px;
- top: 20px;
- font-family: monospace;
- font-size: 12px;
-}
-
-img.navbutton{
- margin-left: -5px;
- border: 0px;
-}
-
-img.navplay{
- margin-left: -5px;
- border: 0px;
-}
-
-img.navstop{
- position: absolute;
- left: -5px;
- top: 9px;
- border: 0px;
-}
-
-table.memtable {
- position: absolute;
- top: 63px;
- left: 820px;
- font-family: monospace;
- font-size: 12px;
- border-spacing: 0px;
-}
+/*
+ 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.
+*/
+
+body {
+ background: white;
+ color: black;
+ font-family: cursive;
+ font-size: 12px;
+}
+
+div.frame {
+ margin-left: 10px;
+ position: relative;
+ width: 1150px;
+ height: 600px;
+}
+
+div.chip {
+ background: lightgray;
+ border: 2px solid gray;
+ position: absolute;
+ width: 800px;
+ height: 600px;
+ overflow: hidden;
+}
+
+canvas.chip {
+ position: absolute;
+ width: 600px;
+ height: 600px;
+}
+
+div.buttons{
+ position: absolute;
+ top: -5px;
+ left: 820px;
+}
+
+p.status {
+ position: absolute;
+ left: 820px;
+ top: 20px;
+ font-family: monospace;
+ font-size: 12px;
+}
+
+img.navbutton{
+ border: 0px;
+}
+
+img.navplay{
+ position: relative;
+ margin-right: 5px;
+ border: 0px;
+}
+
+img.navstop{
+ position: absolute;
+ border: 0px;
+}
+
+table.memtable {
+ position: absolute;
+ top: 78px;
+ left: 820px;
+ font-family: monospace;
+ font-size: 12px;
+ border-spacing: 0px;
+}

wires.js

@@ -1,338 +1,362 @@
-/*
- 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 frame, chipbg, overlay, hilite, hitbuffer, ctx;
-var centerx=300, centery=300;
-var zoom=1;
-var dragMouseX, dragMouseY, moved;
-var statbox;
-
-var colors = ['rgba(128,128,128,0.4)','#FFFF00','#FF00FF','#4DFF4D',
-              '#FF4D4D','#801AC0','rgba(128,0,255,0.75)'];
-              
-var nodes = new Array();
-var transistors = {};
-
-var ngnd = nodenames['vss'];
-var npwr = nodenames['vcc'];
-
-
-/////////////////////////
-//
-// Drawing Setup
-//
-/////////////////////////
-
-function setup(){
-	frame = document.getElementById('frame');
-	statbox = document.getElementById('status');
-	setupNodes();
-	setupTransistors();
-	setupBackground();
-	setupOverlay();
-	setupHilite();
-	setupHitBuffer();
-	recenter();
-	refresh();
-	setupTable();
-	window.onkeypress = function(e){handleKey(e);}
-	hilite.onmousedown = function(e){mouseDown(e);}
-	initChip();
-	document.getElementById('stop').style.visibility = 'hidden';
-	go();
-}
-
-function setupNodes(){
-	for(var i in segdefs){
-		var seg = segdefs[i];
-		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()};
-		if(w==ngnd) continue;
-		if(w==npwr) continue;
-		nodes[w].segs.push(seg.slice(3));
-	}
-}
-
-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 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);
-		transistors[name] = trans;
-	}
-}
-
-
-function setupBackground(){
-	chipbg = document.getElementById('chipbg');
-	chipbg.width = 4000;
-	chipbg.height = 4000;
-	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);
-	var start = now();
-	for(var i in segdefs){
-		var seg = segdefs[i];
-		var c = seg[2];
-		ctx.fillStyle = colors[c];
-		drawSeg(ctx, segdefs[i].slice(3));
-		ctx.fill();
-		if((c==0)||(c==6)) ctx.stroke();
-	}		
-	// console.log('time to draw: ', now() - start, ' ms');
-}
-
-function setupOverlay(){
-	overlay = document.getElementById('overlay');
-	overlay.width = 4000;
-	overlay.height = 4000;
-	ctx = overlay.getContext('2d');
-	ctx.scale(overlay.width/10000, overlay.height/10000);
-}
-
-function setupHilite(){
-	hilite = document.getElementById('hilite');
-	hilite.width = 4000;
-	hilite.height = 4000;
-	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.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);
-}
-
-function hitBufferNode(ctx, i, w){
-	var low = hexdigit(i&0xf);
-	var mid = hexdigit((i>>4)&0xf);
-	var high = hexdigit((i>>8)&0xf);
-	ctx.fillStyle = '#'+high+'F'+mid+'F'+low+'F';
-	for(i in w) {
-		drawSeg(ctx, w[i]);
-		ctx.fill();
-	}
-}
-
-function hexdigit(n){return '0123456789ABCDEF'.charAt(n);}
-
-
-/////////////////////////
-//
-// Drawing Runtime
-//
-/////////////////////////
-
-function refresh(){
-	ctx.clearRect(0,0,10000,10000);
-	for(i in nodes){
-		if(isNodeHigh(i)) overlayNode(nodes[i].segs);
-	}
-}
-
-function overlayNode(w){
-	ctx.fillStyle = 'rgba(255,0,64,0.4)';
-	for(i in w) {
-		drawSeg(ctx, w[i]);
-		ctx.fill();
-	}
-}
-
-function hiliteNode(n){
-	var ctx = hilite.getContext('2d');
-	ctx.clearRect(0,0,10000,10000);
-	ctx.fillStyle = 'rgba(255,255,255,0.7)';
-	if(n==-1) return;
-	if(isNodeHigh(n[0]))
-		ctx.fillStyle = 'rgba(255,0,0,0.7)';
-
-	for(var i in n){
-		var segs = nodes[n[i]].segs;
-		for(var s in segs){drawSeg(ctx, segs[s]); ctx.fill();}
-	}
-}
-
-
-function drawSeg(ctx, seg){
-	var dx = 400;
-	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));}
-}
-
-function findNodeNumber(x,y){
-	var ctx = hitbuffer.getContext('2d');
-	var pixels = ctx.getImageData(x*4000/600, y*4000/600, 2, 2).data;
-	if(pixels[0]==0) return -1;
-	var high = pixels[0]>>4;
-	var mid = pixels[1]>>4;
-	var low = pixels[2]>>4;
-	return (high<<8)+(mid<<4)+low;
-}
-
-/////////////////////////
-//
-// 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];
-	}
-}
-
-
-function localx(el, gx){
-	var lx = gx+window.pageXOffset;
-	while(el.offsetLeft!=undefined){
-		lx-=el.offsetLeft+el.clientLeft;
-		el = el.parentNode;
-	}
-	return lx;
-}
-
-function localy(el, gy){
-	var ly = gy+window.pageYOffset;
-	while(el.offsetTop!=undefined){
-		ly-=el.offsetTop+el.clientTop;
-		el = el.parentNode;
-	}
-	return ly;
-}
-
-function setStatus(){
-	var res = '';
-	for(var i=0;i<arguments.length;i++) res=res+arguments[i]+' ';
-	statbox.innerHTML = res;
-}
-
-function nodeName(n) {
-	for(var i in nodenames){
-		if(nodenames[i]==n) return i;
-	}
-	return '';
-}
-
-function now(){return  new Date().getTime();}
+/*
+ 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 frame, chipbg, overlay, hilite, hitbuffer, ctx;
+var centerx=300, centery=300;
+var zoom=1;
+var dragMouseX, dragMouseY, moved;
+var statbox;
+
+var layernames = ['metal', 'diff', 'inputdiode', 'diff0', 'diff1', 'poly'];
+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 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();
+}
+
+function setupNodes(){
+	for(var i in segdefs){
+		var seg = segdefs[i];
+		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()};
+		if(w==ngnd) continue;
+		if(w==npwr) continue;
+		nodes[w].segs.push(seg.slice(3));
+	}
+}
+
+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 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);
+		transistors[name] = trans;
+	}
+}
+
+function setupLayerVisibility(){
+	var x=document.getElementById('updateShow');
+	for (var i=0;i<x.childNodes.length;i++) {
+		if(x.childNodes[i].type='checkbox'){
+			x.childNodes[i].checked=drawlayers[x.childNodes[i].name];
+		}
+	}
+}
+
+function setupBackground(){
+	console.log('starting setupBackground');
+	chipbg = document.getElementById('chipbg');
+	chipbg.width = 4000;
+	chipbg.height = 4000;
+	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);
+	for(var i in segdefs){
+		var seg = segdefs[i];
+		var c = seg[2];
+		if (drawlayers[c]) {
+			ctx.fillStyle = colors[c];
+			drawSeg(ctx, segdefs[i].slice(3));
+			ctx.fill();
+			if((c==0)||(c==6)) ctx.stroke();
+		}
+	}		
+}
+
+function setupOverlay(){
+	overlay = document.getElementById('overlay');
+	overlay.width = 4000;
+	overlay.height = 4000;
+	ctx = overlay.getContext('2d');
+	ctx.scale(overlay.width/10000, overlay.height/10000);
+}
+
+function setupHilite(){
+	hilite = document.getElementById('hilite');
+	hilite.width = 4000;
+	hilite.height = 4000;
+	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.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);
+}
+
+function hitBufferNode(ctx, i, w){
+	var low = hexdigit(i&0xf);
+	var mid = hexdigit((i>>4)&0xf);
+	var high = hexdigit((i>>8)&0xf);
+	ctx.fillStyle = '#'+high+'F'+mid+'F'+low+'F';
+	for(i in w) {
+		drawSeg(ctx, w[i]);
+		ctx.fill();
+	}
+}
+
+function hexdigit(n){return '0123456789ABCDEF'.charAt(n);}
+
+
+/////////////////////////
+//
+// Drawing Runtime
+//
+/////////////////////////
+
+function refresh(){
+	ctx.clearRect(0,0,10000,10000);
+	for(i in nodes){
+		if(isNodeHigh(i)) overlayNode(nodes[i].segs);
+	}
+}
+
+function overlayNode(w){
+	ctx.fillStyle = 'rgba(255,0,64,0.4)';
+	for(i in w) {
+		drawSeg(ctx, w[i]);
+		ctx.fill();
+	}
+}
+
+function hiliteNode(n){
+	var ctx = hilite.getContext('2d');
+	ctx.clearRect(0,0,10000,10000);
+	ctx.fillStyle = 'rgba(255,255,255,0.7)';
+	if(n==-1) return;
+	if(isNodeHigh(n[0]))
+		ctx.fillStyle = 'rgba(255,0,0,0.7)';
+
+	for(var i in n){
+		var segs = nodes[n[i]].segs;
+		for(var s in segs){drawSeg(ctx, segs[s]); ctx.fill();}
+	}
+}
+
+
+function drawSeg(ctx, seg){
+	if(noGraphics) return;
+	var dx = 400;
+	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));}
+}
+
+function findNodeNumber(x,y){
+	var ctx = hitbuffer.getContext('2d');
+	var pixels = ctx.getImageData(x*4000/600, y*4000/600, 2, 2).data;
+	if(pixels[0]==0) return -1;
+	var high = pixels[0]>>4;
+	var mid = pixels[1]>>4;
+	var low = pixels[2]>>4;
+	return (high<<8)+(mid<<4)+low;
+}
+
+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];
+	}
+}
+
+
+function localx(el, gx){
+	var lx = gx+window.pageXOffset;
+	lx-=el.getBoundingClientRect().left
+	return lx;
+}
+
+function localy(el, gy){
+	var ly = gy+window.pageYOffset;
+	ly-=el.getBoundingClientRect().top
+	return ly;
+}
+
+function setStatus(){
+	var res = '';
+	for(var i=0;i<arguments.length;i++) res=res+arguments[i]+' ';
+	statbox.innerHTML = res;
+}
+
+function nodeName(n) {
+	for(var i in nodenames){
+		if(nodenames[i]==n) return i;
+	}
+	return '';
+}
+
+function now(){return  new Date().getTime();}