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sim.html
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<!DOCTYPE html>
<html>
<head>
<title>
CPU Simulator by Mark Craig (youtube.com/MrMcSoftware) Copyright © 2023
</title>
<style>
body
{
background-color: black;
/* background:url("../../Desktop/waterf.jpg"); */ /* just playing */
color: white;
/* Uncomment transition line for gradual dark/light mode change */
/* transition: color 300ms, background-color 300ms; */
}
body.dark-mode
{
background-color: black;
color: white;
}
body.dark-mode a:link { color: #f0f000; }
body.dark-mode a:visited { color: #00ff00; }
body.dark-mode code { background-color: #404040; }
body.light-mode
{
background-color: #d0d0d0;
color: black;
}
body.light-mode a:link { color: #0000f0; }
body.light-mode a:visited { color: #a000a0; }
body.light-mode code { background-color: #ffffff; }
/* tab stops of 8 are a bit much for my tastes, adjust to your prefs. */
textarea, pre { -moz-tab-size: 4; -o-tab-size: 4; tab-size: 4; }
.modal
{
display: none;
position: fixed;
z-index: 1;
padding-top: 100px;
left: 0;
top: 0;
width: 100%;
height: 100%;
overflow: auto;
background-color: rgb(0,0,0);
background-color: rgba(0,0,0,0.4);
}
.modal-content
{
position: relative;
background-color: #171717;
margin: auto;
padding: 0;
border: 2px solid #6797ff;
width: 40%;
box-shadow: 8px 8px 6px 5px rgba(0,0,0,0.2),0 6px 20px 0 rgba(0,0,0,0.19);
}
.close
{
color: white;
float: right;
font-size: 18px;
font-weight: bold;
}
.close:hover,
.close:focus
{
color: #ff4040;
text-decoration: none;
cursor: pointer;
}
.modal-header
{
padding: 2px 16px;
background-color: #1022e4;
color: white;
font-size: 14px;
font-weight: bold;
}
.modal-body { padding: 2px 16px; color: white; font-size: 14px; }
/*
@font-face
{
font-family: "myfont";
font-style: normal;
font-weight: normal;
src: url("SudegnakNo4-Green-0fcf.woff") format('woff');
}
*/
</style>
<script src="contrib/audiosynth.js"></script>
</head>
<body>
<!--font face="myfont" size="2">CPU Sim</font><br>
<div style="font-family:myfont; font-size:100px">CPU Sim</div-->
<button onclick="start()">Start</button>
<button onclick="resetCPU()">Reset</button>
<button id="pauseID" onclick="pauseResume()"> Pause </button>
<button onclick="runIt()">Step</button>
<input id="speedID" type="text" value="1" maxlength="8" size=4 title="Speed (lower is faster (minimum is 0))" style="background-color:#d0d000; color:#000;" onchange="setSpeed()"/>
<input id="extDevID" type="text" value="" maxlength="8" size=4 title="External Device input value (in hex)" style="background-color:#e0c000; color:#000;" onchange="setExtDev()"/>
<select id="vidModeID" onchange="setVideoMode()">
<option value="0" selected>256x256x24</option>
<option value="1">128x128x16</option>
<option value="2">256x256x16</option>
<option value="3">320x240x24</option>
</select>
<select id="instrumentID" onchange="setInstrument()">
<option value="piano" selected="selected">Piano</option>
<option value="organ">Organ</option>
<option value="acoustic">Acoustic Guitar</option>
<option value="edm">EDM</option>
</select>
<button onclick="darkLightMode()" title="Darkmode/Lightmode Toggle"><div id="darkLightModeID">☼</div></button>
<!--input type="checkbox" id="verboseID" onclick="setVerbose()" title="Toggle verbose output on console."> Verbose </input-->
<input type="checkbox" id="showAssemID" onclick="setShowAssembler()" title="Toggle showing the Assembler"/> Assembler
<input id="fileID" name="files" type="file"/>
<br><br>
<div style="float:left">
<canvas id="canvas1" width=595 height=266></canvas> <br>
<!--put wrap="off" in textarea for no word wrap-->
<textarea id="ttyID" rows="13" cols="82" value="" onkeypress='ttyInput(event)' onkeydown='ttyInputSpecial(event)' readonly style="background-color:#000050; color:#fff;"></textarea> <br>
<button onclick="clearTTY()">Clear TTY</button>
<button onclick="setVideoMode()">Clear Video Screen</button>
<button onclick="matrixDisplay()">Clear LED Matrix</button>
</div>
<div style="float:left">
<textarea id="disassID" rows="31" cols="40" value="" readonly style="background-color: #000050; color:#fff; background:url(images/drag.png) center top no-repeat;"></textarea> <br>
<button onclick="disassemble()">Disassemble</button>
<button onclick="clearDisassembly()">Clear Disassembly</button> <br>
<div id="instDivID" style="display:none"><textarea id="instID" rows="4" cols="40" value="" readonly style="background-color: #000050; color:#fff;"></textarea> </div>
</div>
<!--div style="float:left"-->
<div>
<input id="pcID" type="text" value="" maxlength="100" size=8 title="Program Counter (PC) Value" readonly style="background-color:#500000; color:#fff;"> PC</input><br><br>
<input id="irID" type="text" value="" maxlength="100" size=8 title="Instruction Register (IR) Value" readonly style="background-color:#005000; color:#fff;"> IR</input><br><br>
<input id="yID" type="text" value="" maxlength="100" size=8 title="Y Register Value" readonly style="background-color:#505000; color:#fff;"> Y</input>
<div id="yFdivID" style="display:none">
<input id="yFID" type="text" value="" maxlength="100" size=18 title="Y Register Value (float)" readonly style="background-color:#505000; color:#fff;"/>
</div>
<br><br>
<input id="aID" type="text" value="" maxlength="100" size=8 title="A Register Value" readonly style="background-color:#005050; color:#fff;"> A</input>
<div id="aFdivID" style="display:none">
<input id="aFID" type="text" value="" maxlength="100" size=18 title="A Register Value (float)" readonly style="background-color:#005050; color:#fff;"/>
</div>
<br><br>
<input id="clockID" type="text" value="" maxlength="100" size=15 title="Clock Value" readonly style="background-color:#500050; color:#fff;"> Clock</input><br><br>
<input id="kbID" type="text" value="" maxlength="100" size=15 title="Keyboard Buffer" readonly style="background-color:#000050; color:#fff;"> KB</input><br><br>
<input type="checkbox" id="showRegsID" onclick="setShowRegs()" title="Toggle showing register values"/> Show Above Regs<br>
<input type="checkbox" id="showYID" onclick="setShowY()" title="Toggle graphically showing Y register" checked/> Show Y<br>
<input type="checkbox" id="showAID" onclick="setShowA()" title="Toggle graphically showing A register" checked/> Show A<br>
<input type="checkbox" id="instTTYID" onclick="setInstTTY()" title="Toggle showing instruction TTY"/> Instruction TTY<br>
<input type="checkbox" id="noLagLEDMatID" onclick="setNoLagLEDMat()" title="Toggle No-Lag LED Matrix design"/> No Lag LED Matrix<br>
<input type="checkbox" id="showYAFID" onclick="setShowYAF()" title="Toggle showing the float representation of the Y and A registers"/> Show Y and A as float<br>
<input type="checkbox" id="breakpID" onclick="setProcBP()" title="Toggle breakpoint processing" checked/> Process breakpoints<br>
<input type="checkbox" id="clockDisplayID" onclick="setClockDisplay()" title="Toggle clock display"/> Display Clock<br>
<input type="checkbox" id="clock24ID" onclick="setClock24()" title="Toggle 24 hour clock"/> 24 Hour Clock<br>
<input type="checkbox" id="clearTTYID" onclick="setAllowClearTTY()" title="Toggle allowing program to clear TTY screen." checked/> Allow TTY Clear<br>
<input type="checkbox" id="fastModeID" onclick="setFastMode()" title="Toggle fast mode. BE CAREFUL, keyboard input, etc. will not be available"/> Fast Mode (Be Careful)<br>
</div>
<div id="assemblerID" style="display:none">
<br>
<div style="float:left">
<textarea id="assemID" rows="34" cols="82" value="" style="background-color:#000050; color:#fff;" spellcheck="false" wrap="off" onkeydown='assemInput(event)'></textarea> <br>
<button onclick="runAssem()">Assemble</button>
<button onclick="saveAssem()">Save As: </button>
<input id="saveNameID" type="text" value="" maxlength="32" size=8 title="Filename to use for saving your assembly source code" style="background-color:#d0d000; color:#000;"/>
<input id="assemFileID" name="files" type="file"/>
</div>
<div style="float:left">
<textarea id="assemConsoleID" rows="34" cols="42" value="" style="background-color:#000050; color:#fff;" readonly></textarea> <br>
<select id="assemVerboseID" onchange="setAssemVerbose()" title="Set how verbose level of assembly errors, warnings, information, and statistics">
<option value="0">Just error messages</option>
<option value="1" selected>Also general messages</option>
<option value="2">Also parsed strings</option>
<option value="3">Also final machine code</option>
</select>
</div>
<div style="float:left">
<button onclick="clearAssem()" title="Clear/Erase everything in the assembly source edit window" style="width:180px">Erase Assembly Source</button><br><br>
<button onclick="saveBin()" title="Export/Save assembled machine code to a Logisim RAM file (which also can be loaded into this simulator)" style="width:180px">Save Machine Code As:</button><br>
<input id="saveExportNameID" type="text" value="" maxlength="32" title="Filename to use for saving your assembled machine code" style="background-color:#e0c000; color:#000; width:174px"/><br><br>
<form action="#" accept-charset=utf-8><button type="submit" title="Go to top of page (go to the simulator)" style="width:180px">Go To Top</button></form><br>
</div>
</div>
<div id="ModalID" class="modal">
<div class="modal-content">
<div class="modal-header">
<span id="modalHeaderID"></span>
<span class="close">×</span>
</div>
<div id="modalBodyID" class="modal-body"></div>
</div>
</div>
<img id="img0" src="images/cpusim.png" style="display:none">
<img id="img1" src="images/cpusim2.png" style="display:none">
<img id="img2" src="images/cpusim3.png" style="display:none">
<img id="img3" src="images/cpusim4.png" style="display:none">
<img id="img4" src="images/cpusim5.png" style="display:none">
<script>
window.onload=function()
{
for (var vObj={},i=0,vArr=window.location.search.substring(1).split('&');i<vArr.length;v=vArr[i++].split('='),vObj[v[0]]=v[1]) { }
if (vObj.dark==="false") { darkLightMode(); }
if (vObj.assembler==="true") { document.querySelector('#showAssemID').checked=true; setShowAssembler(); }
if (vObj.midimode==="off") { midiMode=0; }
if (vObj.verbose==="on") { verb=true; }
if (vObj.wordwrap==="off") { document.querySelector('#ttyID').wrap="off"; }
if (typeof(vObj.image)!=='undefined') { img=parseInt(vObj.image); }
drawPanel();
}
//const RAMSIZE=65536;
//const RAMSIZE=16777216;
const RAMSIZE=8388608;
const tty=document.getElementById("ttyID");
const disa=document.getElementById("disassID");
const itty=document.getElementById("instID");
const dyreg=document.getElementById("yID");
const dareg=document.getElementById("aID");
const dpcreg=document.getElementById("pcID");
const dirreg=document.getElementById("irID");
const dyfreg=document.getElementById("yFID");
const dafreg=document.getElementById("aFID");
const dclock=document.getElementById("clockID");
const dkb=document.getElementById("kbID");
// Assembler text areas
const assem=document.getElementById("assemID");
const acon=document.getElementById("assemConsoleID");
var RAM=new Array(RAMSIZE);
var LEDm=new Array(7);
var instList=new Array(4);
var Stack=new Array(256);
var UStack=new Array(256);
var Z,PC,IR;
var SP=0,USP=0,breakp=1;
var Y=0,A=0;
var loaded=false;
var vidMode=0;
var vidW=vidH=256,vidX=0,vidY=0,showY=true,showA=true,showRegs=false;
var noLagLEDMat=false,showYAF=false;
var i,r,n,started=0;
var halt=true,verb=false,nl=true,disass=false;
var allowClearTTY=true,strobe=false,instTTY=false,ins=0;
var colors=["#3050af"];
var clock12=true,clockV=0,extDev=0;
const midiNotes=["C","C#","D","D#","E","F","F#","G","G#","A","A#","B"];
var instrument=Synth.createInstrument('piano');
var midiMode=1,darkMode=1,img=3;
var interval=0,speed=1,fastMode=false,pause=false,clockD=false,fastIntr=0;
var inputStr="";
var canvas=document.getElementById('canvas1');
//canvas.onclick=onclickfunc; // not needed at this point
//document.onkeydown=keycontrol; // not needed at this point
//document.onkeypress=ttyInput; // can't do this, causes problems
var hdc=canvas.getContext("2d");
//hdc.font="10px Helvetica"; // not needed at this point
//hdc.font="100px myfont";
drawPanel();
function drawPanel()
{
hdc.fillStyle=colors[0];
hdc.fillRect(0,0,595,266);
hdc.fillStyle="#000000";
hdc.fillRect(5,5,vidW,vidH);
//hdc.fillText("CPU Sim",340,200);
if (img>=0)
{
/*
var tmp=document.createElement("img");
tmp.style.display='none'
*/
var imgY;
var tmp=document.getElementById("img"+img.toString());
switch (img)
{
case 0: tmp.src="images/cpusim.png"; imgY=130; break;
case 1: tmp.src="images/cpusim2.png"; imgY=113; break;
case 2: tmp.src="images/cpusim3.png"; imgY=113; break;
case 3: tmp.src="images/cpusim4.png"; imgY=130; break;
case 4: tmp.src="images/cpusim5.png"; imgY=130; break;
}
//document.body.appendChild(tmp);
hdc.drawImage(tmp,336,imgY);
//document.body.removeChild(tmp);
}
ledDisplay();
matrixDisplay();
cpuStatus();
strobeStatus();
}
function matrixDisplay()
{
var y,i;
hdc.fillStyle="#646464";
hdc.lineWidth=1;
hdc.strokeStyle="#000000";
for (y=0;y<7;y++)
{
for (i=0;i<12;i++)
{
hdc.fillRect(332+i*8,50+y*8,8,8);
hdc.rect(332+i*8,50+y*8,8,8);
}
hdc.stroke();
}
}
function ledDisplay()
{
hdc.fillStyle="#646464";
hdc.lineWidth=1;
hdc.strokeStyle="#000000";
for (i=0;i<32;i++)
{
hdc.fillRect(332+i*8,5,8,8);
hdc.rect(332+i*8,5,8,8);
hdc.fillRect(332+i*8,20,8,8);
hdc.rect(332+i*8,20,8,8);
}
hdc.stroke();
}
function updateDisplay()
{
if (fastMode) { return; }
if (showRegs)
{
dyreg.value=Y.toString(16);
dareg.value=A.toString(16);
dpcreg.value=PC.toString(16);
dirreg.value=IR.toString(16);
}
if (showY)
{
for (i=0;i<32;i++)
{
if ((Y>>>(31-i))&0x00000001) { str="#ffff00"; } else { str="#646464"; }
hdc.fillStyle=str;
hdc.fillRect(333+i*8,6,6,6);
}
}
if (showYAF)
{
dyfreg.value=IEEEToFloat(Y).toString();
dafreg.value=IEEEToFloat(A).toString();
}
if (showA)
{
for (i=0;i<32;i++)
{
if ((A>>>(31-i))&0x00000001) { str="#00ffff"; } else { str="#646464"; }
hdc.fillStyle=str;
hdc.fillRect(333+i*8,21,6,6);
}
}
if (clockD)
{
var str;
var hour=(Y&0x0000001f).toString();
hour="0".repeat((n=2-hour.length)>0?n:0)+hour;
var min=((Y>>>5)&0x0000003f).toString();
min="0".repeat((n=2-min.length)>0?n:0)+min;
var sec=((Y>>>11)&0x0000003f).toString();
sec="0".repeat((n=2-sec.length)>0?n:0)+sec;
str=hour+":"+min+":"+sec+(((Y>>>17)&0x00000001)?"pm":"am");
var mon=((Y>>>23)&0x0000000f).toString();
mon="0".repeat((n=2-mon.length)>0?n:0)+mon;
var day=((Y>>>27)&0x0000001f).toString();
day="0".repeat((n=2-day.length)>0?n:0)+day;
var year=((Y>>>18)&0x0000001f).toString();
year="0".repeat((n=2-year.length)>0?n:0)+year;
str+=" "+mon+"/"+day+"/"+year;
dclock.value=str;
}
}
function getInstruction(inst)
{
var str2="";
var opcode,zregi;
opcode=(inst)&0x000000ff;
zregi=inst>>>8;
var zreg="$"+zregi.toString(16)+" / "+zregi;
if ((zregi<127)&&(zregi>=32)) { zreg+=" / "+String.fromCharCode(zregi); }
switch (opcode)
{
case 0: str2="LOADI "+zreg; break;
case 1: str2="LOAD "+zreg; break;
case 2: str2="STOREI "+zreg; break;
case 3: str2="STORE "+zreg; break;
case 4: str2="ADDI "+zreg; break;
case 5: str2="ADD "+zreg; break;
case 6: str2="SUBI "+zreg; break;
case 7: str2="SUB "+zreg; break;
case 8: str2="JUMP "+zreg; break;
case 9: str2="JUMPI "+zreg; break;
case 10: str2="JUMPII "+zreg; break;
case 11: str2="DATAIN"; break;
case 12: str2="HALT"; break;
case 13: str2="SKIPNEG"; break;
case 14: str2="STROBE"; break;
case 15: str2="NOOP"; break;
case 16: str2="MULI "+zreg; break;
case 17: str2="MUL "+zreg; break;
case 18: str2="DIVI "+zreg; break;
case 19: str2="DIV "+zreg; break;
case 20: str2="MODI "+zreg; break;
case 21: str2="MOD "+zreg; break;
case 22: str2="LOADAI "+zreg; break;
case 23: str2="LOADA "+zreg; break;
case 24: str2="JUMPEQI "+zreg; break;
case 25: str2="JUMPGTI "+zreg; break;
case 26: str2="JUMPLTI "+zreg; break;
case 27: str2="JUMPNEQI "+zreg; break;
case 28: str2="JUMPGTEI "+zreg; break;
case 29: str2="JUMPLTEI "+zreg; break;
case 30: str2="NEGY"; break;
case 31: str2="STOREAI "+zreg; break;
case 32: str2="LOADAIND"; break;
case 33: str2="ANDI "+zreg; break;
case 34: str2="AND "+zreg; break;
case 35: str2="ORI "+zreg; break;
case 36: str2="OR "+zreg; break;
case 37: str2="NOT"; break;
case 38: str2="XORI "+zreg; break;
case 39: str2="XOR "+zreg; break;
case 40: str2="JUMPEQ "+zreg; break;
case 41: str2="JUMPGT "+zreg; break;
case 42: str2="JUMPLT "+zreg; break;
case 43: str2="JUMPNEQ "+zreg; break;
case 44: str2="JUMPGTE "+zreg; break;
case 45: str2="JUMPLTE "+zreg; break;
case 46: str2="STOREAIND"; break;
case 47: str2="FADDA"; break;
case 48: str2="FADD "+zreg; break;
case 49: str2="FSUBA"; break;
case 50: str2="FSUB "+zreg; break;
case 51: str2="FMULA"; break;
case 52: str2="FMUL "+zreg; break;
case 53: str2="FDIVA"; break;
case 54: str2="FDIV "+zreg; break;
case 55: str2="FMODA"; break;
case 56: str2="FMOD "+zreg; break;
case 57: str2="FNEGY"; break;
case 58: str2="FSQRTY"; break;
case 59: str2="FSQRT "+zreg; break;
case 60: str2="FSINY"; break;
case 61: str2="FSIN "+zreg; break;
case 62: str2="FCOSY"; break;
case 63: str2="FCOS "+zreg; break;
case 64: str2="FTANY"; break;
case 65: str2="FTAN "+zreg; break;
case 66: str2="FASINY"; break;
case 67: str2="FASIN "+zreg; break;
case 68: str2="FACOSY"; break;
case 69: str2="FACOS "+zreg; break;
case 70: str2="FATANY"; break;
case 71: str2="FATAN "+zreg; break;
case 72: str2="FATAN2A"; break;
case 73: str2="FATAN2 "+zreg; break;
case 74: str2="FPOWA"; break;
case 75: str2="FPOW "+zreg; break;
case 76: str2="FLNY"; break;
case 77: str2="FLN "+zreg; break;
case 78: str2="FLOGY"; break;
case 79: str2="FLOG "+zreg; break;
case 80: str2="FABSY"; break;
case 81: str2="FABS "+zreg; break;
case 82: str2="FEXPY"; break;
case 83: str2="FEXP "+zreg; break;
case 84: str2="FPTOINTY"; break;
case 85: str2="FPTOINT "+zreg; break;
case 86: str2="INTTOFPY"; break;
case 87: str2="INTTOFP "+zreg; break;
case 88: str2="FJUMPEQI "+zreg; break;
case 89: str2="FJUMPGTI "+zreg; break;
case 90: str2="FJUMPLTI "+zreg; break;
case 91: str2="FJUMPNEQI "+zreg; break;
case 92: str2="FJUMPGTEI "+zreg; break;
case 93: str2="FJUMPLTEI "+zreg; break;
case 94: str2="FJUMPEQ "+zreg; break;
case 95: str2="FJUMPGT "+zreg; break;
case 96: str2="FJUMPLT "+zreg; break;
case 97: str2="FJUMPNEQ "+zreg; break;
case 98: str2="FJUMPGTE "+zreg; break;
case 99: str2="FJUMPLTE "+zreg; break;
case 100: str2="CALL "+zreg; break;
case 101: str2="RETURN"; break;
case 102: str2="PUSH"; break;
case 103: str2="POP"; break;
case 104: str2="SREAD "+zreg; break;
case 253: str2="FASTINTR"; break;
case 254: str2="BREAKPOINTS "+zreg; break;
case 255: str2="BREAKPOINT "+zreg; break;
default: str2="** Unknown ** "+opcode+" "+zreg; break;
}
return(str2);
}
// process Logisim (RAM contents) bin file
function processBin(bin)
{
console.log("Processing program");
var hasStar,val;
var n=0;
var j;
r=0;
n=bin.indexOf("\n")+1;
var l=bin.length;
while (n<l)
{
var ns=n;
while ((bin.charAt(n)!==' ')&&(bin.charAt(n)!=='\n')&&(n<l)) { n++; }
var str=bin.substring(ns,n);
if (bin.charCodeAt(n)===32) { n++; }
if (bin.charCodeAt(n)===13) { n++; }
if (bin.charCodeAt(n)===10) { n++; }
//if (n>l) break;
hasStar=0;
for (i=0;i<str.length;i++)
{
if (str.charAt(i)==='*')
{
j=parseInt(str.substring(0,i));
val=parseInt(str.substring(i+1),16);
hasStar=1;
break;
}
}
if (hasStar) { for (i=0;i<j;i++) { RAM[r+i]=val; } r+=j; }
else { RAM[r]=parseInt(str,16); r++; }
if (r>=RAMSIZE) { myAlert("<br>Program too big<br><br>","Error"); break; }
}
if (r<RAMSIZE) { RAM[r]=12; r++; } // halt in case the program didn't have halt
console.log("done");
//for (i=0;i<r;i++) { console.log(i+": "+RAM[i]); }
resetCPU();
}
function disassemble()
{
disa.value="";
for (i=0;i<r;i++)
{
var addr=i.toString(16);
addr=" ".repeat((n=5-addr.length)>0?n:0)+addr;
disa.value+=addr+" "+getInstruction(RAM[i])+"\n";
//console.log(addr+" "+getInstruction(RAM[i]));
//console.log(i.toString(16).padStart(5,' ')+" "+getInstruction(RAM[i]));
}
bkgndSet();
}
function drawCircle(hdc,x,y,radius,fill,stroke,strokeWidth)
{
hdc.beginPath();
hdc.arc(x,y,radius,0,2*Math.PI,false);
if (fill) { hdc.fillStyle=fill; hdc.fill(); }
if (stroke) { hdc.lineWidth=strokeWidth; hdc.strokeStyle=stroke; hdc.stroke(); }
}
function cpuStatus()
{
if (halt) { drawCircle(hdc,540,90,10,"#ff0000","#000000",3); }
else { drawCircle(hdc,540,90,10,"#00ff00","#000000",3); }
}
function strobeStatus()
{
if (strobe) { drawCircle(hdc,540,60,10,"#ffff00","#000000",3); }
else { drawCircle(hdc,540,60,10,"#606000","#000000",3); }
}
function fmod(o1,o2)
{
return(Number((o1-(Math.floor(o1/o2)*o2)).toPrecision(8)));
}
function start()
{
if (!loaded) { myAlert("<br>Load or assemble a program first<br><br>","Error",0); return; }
console.log("Running");
PC=0;
halt=false;
cpuStatus();
started=1;
clockV=0;
tty.focus();
if ((!pause)&&(interval===0)) { interval=setInterval(runIt,speed); }
}
function runIt()
{
var o1,o2,p;
var noPC=0;
var opcode;
if (halt) { return; }
if (strobe) { strobe=false; strobeStatus(); }
if (PC>=RAMSIZE) { myAlert("<br>For some reason, PC is out of bounds<br><br>","Error"); return; }
IR=RAM[PC];
if ((instTTY)&&(!fastMode))
{
instList[ins]=getInstruction(IR);
str="";
i=ins-3; if (i<0) { i+=4; } str+=instList[i]+"\n";
i=ins-2; if (i<0) { i+=4; } str+=instList[i]+"\n";
i=ins-1; if (i<0) { i+=4; } str+=instList[i]+"\n";
str+=instList[ins];
itty.value=str;
ins++; if (ins>3) { ins=0; }
}
opcode=IR&0x000000ff;
Z=IR>>>8;
if (verb) { console.log("PC="+PC+" IR="+IR.toString(16)+" opcode="+opcode.toString(16)+" Z="+Z.toString(16)+" Y="+Y.toString(16)+" A="+A.toString(16)); }
switch (opcode)
{
case 0: Y=Z; break;
case 1: Y=RAM[Z]; break;
case 31:
case 2:
if (opcode===31) { p=A; } else { p=Y; }
if (Z>=0x800000)
{
switch (Z)
{
case 0x800000:
if (p&0x800000)
{
if (allowClearTTY) { tty.value=""; }
else { tty.value+="\n"; tty.scrollTop=tty.scrollHeight; }
break;
}
if ((p===13)&&(nl)) { tty.value+="\n"; /* console.log("\n"); */ tty.scrollTop=tty.scrollHeight; }
else { tty.value+=String.fromCharCode(p&0x0000007f); /* console.log(String.fromCharCode(p&0x0000007f)); */ }
break;
case 0x800001: /* console.log("Video pos: "+p); */
switch (vidMode)
{
case 0: vidX=(p&0x000000ff); vidY=((p>>>8)&0x000000ff); break;
case 1: vidX=(p&0x0000007f); vidY=((p>>>7)&0x0000007f); break;
case 2: vidX=(p&0x000000ff); vidY=((p>>>8)&0x000000ff); break;
case 3: if (p===1) { vidX=vidY=0; } break;
}
break;
case 0x800002: /* console.log("Video setpixel: "+p); */
var str;
if (p&0x80000000)
{
vidX=vidY=0;
str="#000000";
hdc.strokeStyle=str;
hdc.fillStyle=str;
hdc.fillRect(5,5,vidW,vidH);
break;
}
switch (vidMode)
{
case 0:
//str="#"+((p>>>16)&0x000000ff).toString(16)+((p>>>8)&0x000000ff).toString(16)+(p&0x000000ff).toString(16);
str="rgb("+((p>>>16)&0x000000ff).toString()+","+((p>>>8)&0x000000ff).toString()+","+(p&0x000000ff).toString()+")";
/*
red=((p>>>16)&0x000000ff).toString(16);
green=((p>>>8)&0x000000ff).toString(16);
blue=(p&0x000000ff).toString(16);
red="0".repeat((n=2-red.length)>0?n:0)+red;
green="0".repeat((n=2-green.length)>0?n:0)+green;
blue="0".repeat((n=2-blue.length)>0?n:0)+blue;
str="#"+red+green+blue;
*/
//hdc.strokeStyle=str;
hdc.fillStyle=str;
hdc.fillRect(vidX+5,vidY+5,1,1);
break;
case 1:
//str="#"+(((p>>>10)&0x0000001f)<<3).toString(16)+(((p>>>5)&0x0000001f)<<3).toString(16)+((p&0x0000001f)<<3).toString(16);
str="rgb("+(((p>>>10)&0x0000001f)<<3).toString()+","+(((p>>>5)&0x0000001f)<<3).toString()+","+((p&0x0000001f)<<3).toString()+")";
//hdc.strokeStyle=str;
hdc.fillStyle=str;
hdc.fillRect(vidX*2+5,vidY*2+5,2,2);
//disa.value+="c: "+vidX+","+vidY+": "+str+"\n";
break;
case 2:
//str="#"+(((p>>>10)&0x0000001f)<<3).toString(16)+(((p>>>5)&0x0000001f)<<3).toString(16)+((p&0x0000001f)<<3).toString(16);
str="rgb("+(((p>>>10)&0x0000001f)<<3).toString()+","+(((p>>>5)&0x0000001f)<<3).toString()+","+((p&0x0000001f)<<3).toString()+")";
//hdc.strokeStyle=str;
hdc.fillStyle=str;
hdc.fillRect(vidX+5,vidY+5,1,1);
break;
case 3:
//str="#"+((p>>>16)&0x000000ff).toString(16)+((p>>>8)&0x000000ff).toString(16)+(p&0x000000ff).toString(16);
str="rgb("+((p>>>16)&0x000000ff).toString()+","+((p>>>8)&0x000000ff).toString()+","+(p&0x000000ff).toString()+")";
//hdc.strokeStyle=str;
hdc.fillStyle=str;
hdc.fillRect(vidX+5,vidY+5,1,1);
vidX++; if (vidX>319) { vidX=0; vidY++; } break;
}
break;
case 0x800003: if (inputStr.length) { inputStr=inputStr.substring(1); } dkb.value=inputStr; /* console.log("keyboard consume"); */ break;
case 0x800004: /* console.log("sound freq: "+p); */
if (midiMode)
{
if (p<128) { instrument.play(midiNotes[p%12],Math.trunc(p/12)-1,2); }
}
else { p=Math.trunc((12.0*Math.log(p/220.0)/Math.log(2.0))+57.01); instrument.play(midiNotes[p%12],Math.trunc(p/12)-1,2); }
break;
case 0x800005: Synth.setVolume(p/127.0); break;
case 0x800006:
var r,i,y;
if (noLagLEDMat)
{
if (p&0x00080000)
{
LEDm[(p>>>16)&0x00000007]=p;
for (r=0;r<7;r++)
{
y=r*8;
for (i=0;i<12;i++)
{
if ((LEDm[r]>>>(11-i))&0x00000001) { str="#00ff00"; } else { str="#646464"; }
hdc.fillStyle=str;
hdc.fillRect(333+i*8,51+y,6,6);
}
}
}
else { LEDm[(p>>>16)]=p; }
}
else
{
y=(p>>>16)*8;
if ((p>>>16)>6) { break; } // must be no lag version
for (i=0;i<12;i++)
{
if ((p>>>(11-i))&0x00000001) { str="#00ff00"; } else { str="#646464"; }
hdc.fillStyle=str;
hdc.fillRect(333+i*8,51+y,6,6);
}
}
/*
var bval=(p&0x00000fff).toString(2);
bval="0".repeat((n=12-bval.length)>0?n:0)+bval;
console.log("LED matrix: row: "+(p>>>16).toString()+" "+bval);
*/
break;
case 0x800007: /* console.log("time"); */
if (p&0x800000) { clockV=0; }
else
{
var current=new Date(),hours;
i=0;
if ((hours=current.getHours())>=12) { i=1; }
if (clock12)
{
if (hours>12) { hours-=12; }
else if (hours===0) { hours=12; }
}
clockV=hours|(current.getMinutes()<<5)|
(current.getSeconds()<<11)|(i<<17)|
((current.getFullYear()-2000)<<18)|
((current.getMonth()+1)<<23)|(current.getDate()<<27);
}
break;
}
}
else { RAM[Z]=p; }
break;
case 3: console.log("STORE not implemented\n"); break;
case 4: Y+=Z; break;
case 5: Y+=RAM[Z]; break;
case 6: Y-=Z; break;
case 7: Y-=RAM[Z]; break;
case 8: PC=Z; noPC=1; break;
case 9: PC=RAM[Z]; noPC=1; break;
case 10: console.log("JUMPII not implemented\n"); break;
case 11: if (fastMode) { turnOffFastMode(); } Y=extDev|clockV;
if (inputStr.length) { Y|=(inputStr.charCodeAt(0)+256); }
/* tty.focus(); */ clockV=0;
break;
case 12: halt=true; cpuStatus(); break;
case 13: if (Y&0x80000000) { PC++; } break;
case 14: strobe=true; /* console.log("Strobe\n");*/ strobeStatus(); break;
case 15: break;
case 16: Y*=Z; break;
case 17: Y*=RAM[Z]; break;
case 18: Y=Math.trunc(Y/Z); break;
case 19: Y=Math.trunc(Y/RAM[Z]); break;
case 20: Y%=Z; break;
case 21: Y%=RAM[Z]; break;
case 22: A=Z; break;
case 23: A=RAM[Z]; break;
case 24: if (Y===A) { PC=Z; noPC=1; } break;
case 25: if (Y>A) { PC=Z; noPC=1; } break;
case 26: if (Y<A) { PC=Z; noPC=1; } break;
case 27: if (Y!==A) { PC=Z; noPC=1; } break;
case 28: if (Y>=A) { PC=Z; noPC=1; } break;
case 29: if (Y<=A) { PC=Z; noPC=1; } break;
case 30: Y=-Y; break;
case 32: if (Y<RAMSIZE) { A=RAM[Y]; } else { console.log("RAM: out of bounds"); } break;
case 33: Y&=Z; break;
case 34: Y&=RAM[Z]; break;
case 35: Y|=Z; break;
case 36: Y|=RAM[Z]; break;
case 37: Y=~Y; break;
case 38: Y^=Z; break;
case 39: Y^=RAM[Z]; break;
case 40: if (Y===A) { PC=RAM[Z]; noPC=1; } break;
case 41: if (Y>A) { PC=RAM[Z]; noPC=1; } break;
case 42: if (Y<A) { PC=RAM[Z]; noPC=1; } break;
case 43: if (Y!==A) { PC=RAM[Z]; noPC=1; } break;
case 44: if (Y>=A) { PC=RAM[Z]; noPC=1; } break;
case 45: if (Y<=A) { PC=RAM[Z]; noPC=1; } break;
case 46: if (Y>=RAMSIZE) { console.log("STOREAIND: Y out of bounds due to ramsize"); } else { RAM[Y]=A; } break;
case 47: o1=IEEEToFloat(Y); o2=IEEEToFloat(A); o1+=o2; Y=FloatToIEEE(o1); break;
case 48: o1=IEEEToFloat(Y); o2=IEEEToFloat(RAM[Z]); o1+=o2; Y=FloatToIEEE(o1); break;
case 49: o1=IEEEToFloat(Y); o2=IEEEToFloat(A); o1-=o2; Y=FloatToIEEE(o1); break;
case 50: o1=IEEEToFloat(Y); o2=IEEEToFloat(RAM[Z]); o1-=o2; Y=FloatToIEEE(o1); break;
case 51: o1=IEEEToFloat(Y); o2=IEEEToFloat(A); o1*=o2; Y=FloatToIEEE(o1); break;
case 52: o1=IEEEToFloat(Y); o2=IEEEToFloat(RAM[Z]); o1*=o2; Y=FloatToIEEE(o1); break;
case 53: o1=IEEEToFloat(Y); o2=IEEEToFloat(A); o1/=o2; Y=FloatToIEEE(o1); break;
case 54: o1=IEEEToFloat(Y); o2=IEEEToFloat(RAM[Z]); o1/=o2; Y=FloatToIEEE(o1); break;
case 55: o1=IEEEToFloat(Y); o2=IEEEToFloat(A); o1=fmod(o1,o2); Y=FloatToIEEE(o1); break;
case 56: o1=IEEEToFloat(Y); o2=IEEEToFloat(RAM[Z]); o1=fmod(o1,o2); Y=FloatToIEEE(o1); break;
case 57: o1=IEEEToFloat(Y); o1=-o1; Y=FloatToIEEE(o1); break;
case 58: o1=IEEEToFloat(Y); o1=Math.sqrt(o1); Y=FloatToIEEE(o1); break;
case 59: o1=IEEEToFloat(RAM[Z]); o1=Math.sqrt(o1); Y=FloatToIEEE(o1); break;
case 60: o1=IEEEToFloat(Y); o1=Math.sin(o1); Y=FloatToIEEE(o1); break;
case 61: o1=IEEEToFloat(RAM[Z]); o1=Math.sin(o1); Y=FloatToIEEE(o1); break;
case 62: o1=IEEEToFloat(Y); o1=Math.cos(o1); Y=FloatToIEEE(o1); break;
case 63: o1=IEEEToFloat(RAM[Z]); o1=Math.cos(o1); Y=FloatToIEEE(o1); break;
case 64: o1=IEEEToFloat(Y); o1=Math.tan(o1); Y=FloatToIEEE(o1); break;
case 65: o1=IEEEToFloat(RAM[Z]); o1=Math.tan(o1); Y=FloatToIEEE(o1); break;
case 66: o1=IEEEToFloat(Y); o1=Math.asin(o1); Y=FloatToIEEE(o1); break;
case 67: o1=IEEEToFloat(RAM[Z]); o1=Math.asin(o1); Y=FloatToIEEE(o1); break;
case 68: o1=IEEEToFloat(Y); o1=Math.acos(o1); Y=FloatToIEEE(o1); break;
case 69: o1=IEEEToFloat(RAM[Z]); o1=Math.acos(o1); Y=FloatToIEEE(o1); break;
case 70: o1=IEEEToFloat(Y); o1=Math.atan(o1); Y=FloatToIEEE(o1); break;
case 71: o1=IEEEToFloat(RAM[Z]); o1=Math.atan(o1); Y=FloatToIEEE(o1); break;
case 72: o1=IEEEToFloat(Y); o2=IEEEToFloat(A); o1=Math.atan2(o1,o2); Y=FloatToIEEE(o1); break;
case 73: o1=IEEEToFloat(Y); o2=IEEEToFloat(RAM[Z]); o1=Math.atan2(o1,o2); Y=FloatToIEEE(o1); break;
case 74: o1=IEEEToFloat(Y); o2=IEEEToFloat(A); o1=Math.pow(o1,o2); Y=FloatToIEEE(o1); break;
case 75: o1=IEEEToFloat(Y); o2=IEEEToFloat(RAM[Z]); o1=Math.pow(o1,o2); Y=FloatToIEEE(o1); break;
case 76: o1=IEEEToFloat(Y); o1=Math.log(o1); Y=FloatToIEEE(o1); break;
case 77: o1=IEEEToFloat(RAM[Z]); o1=Math.log(o1); Y=FloatToIEEE(o1); break;
case 78: o1=IEEEToFloat(Y); o1=Math.log10(o1); Y=FloatToIEEE(o1); break;
case 79: o1=IEEEToFloat(RAM[Z]); o1=Math.log10(o1); Y=FloatToIEEE(o1); break;
case 80: o1=IEEEToFloat(Y); o1=Math.abs(o1); Y=FloatToIEEE(o1); break;
case 81: o1=IEEEToFloat(RAM[Z]); o1=Math.abs(o1); Y=FloatToIEEE(o1); break;
case 82: o1=IEEEToFloat(Y); o1=Math.exp(o1); Y=FloatToIEEE(o1); break;
case 83: o1=IEEEToFloat(RAM[Z]); o1=Math.exp(o1); Y=FloatToIEEE(o1); break;
case 84: o1=IEEEToFloat(Y); Y=Math.trunc(o1); break;
case 85: o1=IEEEToFloat(RAM[Z]); Y=Math.trunc(o1); break;
case 86: o1=Y; Y=FloatToIEEE(o1); break; // MARK?
case 87: o1=RAM[Z]; Y=FloatToIEEE(o1); break; // MARK?
case 88: o1=IEEEToFloat(Y); o2=IEEEToFloat(A); if (o1===o2) { PC=Z; noPC=1; } break;
case 89: o1=IEEEToFloat(Y); o2=IEEEToFloat(A); if (o1>o2) { PC=Z; noPC=1; } break;
case 90: o1=IEEEToFloat(Y); o2=IEEEToFloat(A); if (o1<o2) { PC=Z; noPC=1; } break;
case 91: o1=IEEEToFloat(Y); o2=IEEEToFloat(A); if (o1!=o2) { PC=Z; noPC=1; } break;
case 92: o1=IEEEToFloat(Y); o2=IEEEToFloat(A); if (o1>=o2) { PC=Z; noPC=1; } break;
case 93: o1=IEEEToFloat(Y); o2=IEEEToFloat(A); if (o1<=o2) { PC=Z; noPC=1; } break;
case 94: o1=IEEEToFloat(Y); o2=IEEEToFloat(A); if (o1===o2) { PC=RAM[Z]; noPC=1; } break;
case 95: o1=IEEEToFloat(Y); o2=IEEEToFloat(A); if (o1>o2) { PC=RAM[Z]; noPC=1; } break;
case 96: o1=IEEEToFloat(Y); o2=IEEEToFloat(A); if (o1<o2) { PC=RAM[Z]; noPC=1; } break;
case 97: o1=IEEEToFloat(Y); o2=IEEEToFloat(A); if (o1!=o2) { PC=RAM[Z]; noPC=1; } break;
case 98: o1=IEEEToFloat(Y); o2=IEEEToFloat(A); if (o1>=o2) { PC=RAM[Z]; noPC=1; } break;
case 99: o1=IEEEToFloat(Y); o2=IEEEToFloat(A); if (o1<=o2) { PC=RAM[Z]; noPC=1; } break;
case 100: Stack[SP]=PC+1; SP--; if (SP<0) { SP=255; } PC=Z; noPC=1; break;
case 101: SP++; if (SP>255) { SP=0; } PC=Stack[SP]; noPC=1; break;
case 102: UStack[USP]=Y; USP--; if (USP<0) { USP=255; } break;
case 103: USP++; if (USP>255) { USP=0; } Y=UStack[USP]; break;
case 104: i=USP+(Z&0x000000ff); if (i>255) { i-=256; } Y=UStack[i]; break;
case 253: if (fastMode) { fastIntr=1; fastMode=false; interval=setInterval(setFastMode,speed); } break;
case 254:
if (breakp)
{
var forcedPause=0;
if (!pause) { pauseResume(); forcedPause=1; }
i=0;
var str="<br>";
while (i<1024) { str+=String.fromCharCode(RAM[Z+i]); if (RAM[Z+i]===0) { break; } i++; }
str+="<br><br>";
myAlert(str,"Breakpoint",forcedPause);
}
break;
case 255:
if (breakp)
{
var forcedPause=0;
if (!pause) { pauseResume(); forcedPause=1; }
if (Z===0xffffff) { o1=IEEEToFloat(Y); myAlert("<br>Y = $"+Y.toString(16)+" ("+Y+") ("+o1+")<br><br>","Breakpoint",forcedPause); }
else if (Z===0xfffffe) { o1=IEEEToFloat(A); myAlert("<br>A = $"+A.toString(16)+" ("+A+") ("+o1+")<br><br>","Breakpoint",forcedPause); }
else { o1=IEEEToFloat(RAM[Z]); myAlert("<br>$"+Z.toString(16)+" ("+Z+") = $"+RAM[Z].toString(16)+" ("+RAM[Z]+") ("+o1+")<br><br>","Breakpoint",forcedPause); }
}
break;
default: console.log("Unknown opcode: "+opcode+" ("+IR+")"); break;
}
if (!noPC) { PC++; }
else { noPC=0; }
updateDisplay();
if (halt) { if (verb) { console.log("Halted\n"); } if (interval>0) { clearInterval(interval); interval=0; } started=0; }
}
function runContinuous()
{
while ((!halt)&&(fastMode)) { runIt(); }
}
function pauseResume()
{
var btn=document.getElementById("pauseID");
if (!pause)
{
if (interval>0) { clearInterval(interval); interval=0; }
btn.innerHTML="Resume";
}
else
{
if ((started)&&(interval===0)) { interval=setInterval(runIt,speed); }
btn.innerHTML=" Pause ";
}
pause=!pause;
}
function ttyInputSpecial(event)
{
var keyb=event.keyCode;
if (keyb===0) { keyb=event.charCode; }
if ((event.shiftKey)&&(event.ctrlKey)) { if (!fastMode) { document.querySelector('#fastModeID').checked=true; setFastMode(); } return; } // Ctrl-Shift for Fast Mode
if (keyb===8) { i=inputStr.length; if (i>0) { inputStr=inputStr.substring(0,i-1); dkb.value=inputStr; } } // 8 is backspace
}
function ttyInput(event)
{
var keyb=event.keyCode;
if (keyb===0) { keyb=event.charCode; }
if (keyb!==8) { inputStr+=String.fromCharCode(keyb); dkb.value=inputStr; }
}
function clearTTY()
{
tty.value="";
}
function clearDisassembly()
{
disa.value="";
bkgndSet();
}
function setVerbose()
{
verb=(document.querySelector('#verboseID').checked);
}
function setAllowClearTTY()
{
allowClearTTY=(document.querySelector('#clearTTYID').checked);
}
function turnOffFastMode()
{
fastMode=false;
document.querySelector('#fastModeID').checked=false;
interval=setInterval(runIt,speed);
}
function setFastMode()
{
fastIntr=0;
fastMode=(document.querySelector('#fastModeID').checked);
if (fastMode)
{
if (interval>0) { clearInterval(interval); interval=0; }
// don't need to turn off A display, etc. because not done in updateDisplay
//if (showA) { document.querySelector('#showAID').checked=false; showA=false; }
if ((loaded)&&(!halt)) { runContinuous(); }
}
}
function resetCPU()
{
halt=true;
strobe=false;
started=0;
if (pause) { pauseResume(); }
inputStr="";
dkb.value="";
PC=IR=Y=A=vidX=vidY=LEDm[0]=LEDm[1]=LEDm[2]=LEDm[3]=LEDm[4]=LEDm[5]=LEDm[6]=0;
SP=USP=0;
ledDisplay();
cpuStatus();
strobeStatus();
hdc.fillStyle="#000000";