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index.html
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<html>
<head>
<script type="text/javascript" src="js/fileread.js"></script>
<script type="text/javascript" src="js/log.js"></script>
<script type="text/javascript" src="js/gpu.js"></script>
<script type="text/javascript" src="js/mmu.js"></script>
<script type="text/javascript" src="js/key.js"></script>
<script type="text/javascript" src="js/timer.js"></script>
<script type="text/javascript" src="js/z80.js"></script>
<script type="text/javascript" src="js/tabs.js"></script>
<script type="text/javascript" src="js/xhr.js"></script>
<style type="text/css">
* { margin:0; padding: 0; }
body { padding: 5px; background-color: black; color: white; font-family:Arial, Helvetica, sans-serif; font-size:0.82em; }
#out { height:144px; width:160px; border: 1px solid white; float:left; margin:0 5px 0 0; }
#msg { margin: 5px; font-family: sans-serif; font-size: 0.82em; }
div.tab { height:124px; width:320px; border:1px solid white; margin:20px 5px 5px 165px; overflow:auto; }
ul.ops { float:left; list-style:none inside; }
ul.ops li { cursor:pointer; }
table#reg { font-size:11px; font-family:Lucida Console, Bitstream Vera Sans Mono, monospace; line-height:1em; }
table#reg td.regname { text-align:right; padding-left:1em; }
ul.tablist { list-style: none inside; position:relative; bottom:-1px; }
ul.tablist li { display: block; float: left; background: #444; border-top: 1px solid #444; border-bottom: 1px solid white; padding: 3px 0.5em; margin-right: 2px; cursor: pointer; font-size:9px; }
ul.tablist li.tab_hi { border-left: 1px solid white; border-right: 1px solid white; border-top: 1px solid white; border-bottom: 1px solid black; background: black; }
p#op_load { margin-left: 165px; }
input { background:black; color:white; border:1px solid white; width:5em; }
input#file { width:10em; }
div#tilectrl { float:left; margin:1em;}
div#tilepixels { width:96px; height:96px; border:1px solid white; float:left; margin:1em; }
div#tilepixels div { width:12px; height:12px; float:left; }
div.subcanv { width:160px; float:left; }
p.fps { float:right; text-align:right; }
</style>
</head>
<body>
<div id="out">
<canvas id="screen" width="160" height="144">
</canvas>
</div>
<ul class="tablist" id="tablist_debug">
<li rel="tab_message">Messages</li>
<li rel="tab_registers">Debugger</li>
<li rel="tab_tile">Tile View</li>
</ul>
<div class="tab" id="tab_message"><div id="msg"></div></div>
<div class="tab" id="tab_registers">
<table id="reg">
<tr>
<td class="regname">A</td><td class="reg" rel="a"></td>
<td class="regname">LCDC</td><td class="io" rel="40"></td>
<td class="regname">JOYP</td><td class="io" rel="00"></td>
</tr>
<tr>
<td class="regname">B</td><td class="reg" rel="b"></td>
<td class="regname">STAT</td><td class="io" rel="41"></td>
</tr>
<tr>
<td class="regname">C</td><td class="reg" rel="c"></td>
<td class="regname">SCY</td><td class="io" rel="42"></td>
<td class="regname">DIV</td><td class="io" rel="04"></td>
</tr>
<tr>
<td class="regname">D</td><td class=reg" rel="d"></td>
<td class="regname">SCX</td><td class="io" rel="43"></td>
<td class="regname">TIMA</td><td class="io" rel="05"></td>
</tr>
<tr>
<td class="regname">E</td><td class="reg" rel="e"></td>
<td class="regname">LY</td><td class="io" rel="44"></td>
<td class="regname">TMA</td><td class="io" rel="06"></td>
</tr>
<tr>
<td class="regname">HL</td><td class="reg" rel="hl"></td>
<td class="regname">LYC</td><td class="io" rel="45"></td>
<td class="regname">TCA</td><td class="io" rel="07"></td>
</tr>
<tr>
<td class="regname">PC</td><td class="reg" rel="pc"></td>
<td class="regname">IE</td><td class="io" rel="ff"></td>
</tr>
<tr>
<td class="regname">SP</td><td class="reg" rel="sp"></td>
<td class="regname">IF</td><td class="io" rel="0f"></td>
</tr>
<tr>
<td class="regname">F</td><td class="reg" rel="f"></td>
</tr>
</table>
</div>
<div class="tab" id="tab_tile">
<div id="tilectrl">
<input type="text" id="tilenum" value="0"><br>
<ul class="ops">
<li id="tileprev">Prev</li>
<li id="tilenext">Next</li>
</ul>
</div>
<div id="tilepixels"></div>
</div>
<div class="subcanv">
<ul class="ops">
<li id="op_reset">Reset</li>
<li id="op_run">Run</li>
<li id="op_step">Step</li>
</ul>
<p class="fps"><span id="fps">0</span> fps</p>
</div>
<p id="op_load">
Load <input type="text" id="file" value="/tests/tetris.gb">
Break at <input type="text" id="breakpoint">
</p>
<script type="text/javascript">
jsGB = {
run_interval: 0,
trace: '',
frame: function() {
var fclock = Z80._clock.m+17556;
var brk = document.getElementById('breakpoint').value;
var t0 = new Date();
do {
if(Z80._halt) Z80._r.m=1;
else
{
// Z80._r.r = (Z80._r.r+1) & 127;
Z80._map[MMU.rb(Z80._r.pc++)]();
Z80._r.pc &= 65535;
}
if(Z80._r.ime && MMU._ie && MMU._if)
{
Z80._halt=0; Z80._r.ime=0;
var ifired = MMU._ie & MMU._if;
if(ifired&1) { MMU._if &= 0xFE; Z80._ops.RST40(); }
else if(ifired&2) { MMU._if &= 0xFD; Z80._ops.RST48(); }
else if(ifired&4) { MMU._if &= 0xFB; Z80._ops.RST50(); }
else if(ifired&8) { MMU._if &= 0xF7; Z80._ops.RST58(); }
else if(ifired&16) { MMU._if &= 0xEF; Z80._ops.RST60(); }
else { Z80._r.ime=1; }
}
//jsGB.dbgtrace();
Z80._clock.m += Z80._r.m;
GPU.checkline();
TIMER.inc();
if((brk && parseInt(brk,16)==Z80._r.pc) || Z80._stop)
{
jsGB.pause();
break;
}
} while(Z80._clock.m < fclock);
var t1 = new Date();
document.getElementById('fps').innerHTML=Math.round(10000/(t1-t0))/10;
},
reset: function() {
LOG.reset(); GPU.reset(); MMU.reset(); Z80.reset(); KEY.reset(); TIMER.reset();
Z80._r.pc=0x100;MMU._inbios=0;Z80._r.sp=0xFFFE;Z80._r.hl=0x014D;Z80._r.c=0x13;Z80._r.e=0xD8;Z80._r.a=1;
MMU.load(document.getElementById('file').value);
document.getElementById('op_reset').onclick=jsGB.reset;
document.getElementById('op_run').onclick=jsGB.run;
document.getElementById('op_run').innerHTML='Run';
document.getElementById('op_step').onclick=jsGB.step;
document.getElementById('tilepixels').innerHTML='';
var tp = document.createElement('div');
var x;
for(var i=0; i<64; i++)
{
document.getElementById('tilepixels').appendChild(tp);
tp = tp.cloneNode(false);
}
document.getElementById('tilenum').onupdate=jsGB.dbgtile();
document.getElementById('tileprev').onclick=function(){
var t=parseInt(document.getElementById('tilenum').value); t--; if(t<0) t=383;
document.getElementById('tilenum').value=t.toString();
jsGB.dbgtile();
};
document.getElementById('tilenext').onclick=function(){
var t=parseInt(document.getElementById('tilenum').value); t++; if(t>383) t=0;
document.getElementById('tilenum').value=t.toString();
jsGB.dbgtile();
};
jsGB.dbgupdate();
jsGB.dbgtile();
jsGB.trace = '';
tabMagic.init();
jsGB.pause();
LOG.out('MAIN', 'Reset.');
},
run: function() {
Z80._stop = 0;
jsGB.run_interval = setInterval(jsGB.frame,1);
document.getElementById('op_run').innerHTML = 'Pause';
document.getElementById('op_run').onclick = jsGB.pause;
},
pause: function() {
clearInterval(jsGB.run_interval);
Z80._stop = 1;
jsGB.dbgupdate();
document.getElementById('op_run').innerHTML = 'Run';
document.getElementById('op_run').onclick = jsGB.run;
//XHR.connect('/log.php', {trace:jsGB.trace}, {success:function(x){}});
},
dbgupdate: function() {
var t = document.getElementById('reg').getElementsByTagName('td');
var x,j,k;
for(var i=0; i<t.length; i++)
{
if(t[i].className=='reg')
{
switch(t[i].getAttribute('rel'))
{
case 'a': case 'b': case 'c': case 'd': case 'e':
eval('x=Z80._r.'+t[i].getAttribute('rel')+'.toString(16);if(x.length==1)x="0"+x;');
break;
case 'pc': case 'sp':
eval('x=Z80._r.'+t[i].getAttribute('rel')+'.toString(16);if(x.length<4){p="";for(j=4;j>x.length;j--)p+="0";x=p+x;}');
break;
case 'hl':
k = (Z80._r.h<<8)+Z80._r.l;
x = k.toString(16); if(x.length<4){p="";for(j=4;j>x.length;j--)p+="0";x=p+x;}
break;
case 'f':
x = (Z80._r.f>>4).toString(2);if(x.length<4){p="";for(j=4;j>x.length;j--)p+="0";x=p+x;}
break;
}
t[i].innerHTML = x;
}
else if(t[i].className=='io')
{
j = parseInt(t[i].getAttribute('rel'),16);
x = MMU.rb(0xFF00+j).toString(16);
if(typeof(x) != 'undefined')
{
if(x.length==1) x='0'+x;
t[i].innerHTML = x;
}
}
}
},
dbgtrace: function() {
var a = Z80._r.a.toString(16); if(a.length==1) a='0'+a;
var b = Z80._r.b.toString(16); if(b.length==1) b='0'+b;
var c = Z80._r.c.toString(16); if(c.length==1) c='0'+c;
var d = Z80._r.d.toString(16); if(d.length==1) d='0'+d;
var e = Z80._r.e.toString(16); if(e.length==1) e='0'+e;
var f = Z80._r.f.toString(16); if(f.length==1) f='0'+f;
var h = Z80._r.h.toString(16); if(h.length==1) h='0'+h;
var l = Z80._r.l.toString(16); if(l.length==1) l='0'+l;
var pc = Z80._r.pc.toString(16); if(pc.length<4) { p=''; for(i=4;i>pc.length;i--) p+='0'; pc=p+pc; }
var sp = Z80._r.sp.toString(16); if(sp.length<4) { p=''; for(i=4;i>sp.length;i--) p+='0'; sp=p+sp; }
jsGB.trace +=
("A"+a+"/B"+b+"/C"+c+"/D"+d+"/E"+e+"/F"+f+"/H"+h+"/L"+l+"/PC"+pc+"/SP"+sp+"\n");
},
dbgtile: function() {
var tn = parseInt(document.getElementById('tilenum').value);
var t = GPU._tilemap[tn];
var c = ['#ffffff','#c0c0c0','#606060','#000000'];
var d = document.getElementById('tilepixels').getElementsByTagName('div');
for(var y=0;y<8;y++)
for(var x=0;x<8;x++)
d[y*8+x].style.backgroundColor=c[t[y][x]];
},
step: function() {
if(Z80._r.ime && MMU._ie && MMU._if)
{
Z80._halt=0; Z80._r.ime=0;
if((MMU._ie&1) && (MMU._if&1))
{
MMU._if &= 0xFE; Z80._ops.RST40();
}
}
else
{
if(Z80._halt) { Z80._r.m=1; }
else
{
Z80._r.r = (Z80._r.r+1) & 127;
Z80._map[MMU.rb(Z80._r.pc++)]();
Z80._r.pc &= 65535;
}
}
Z80._clock.m += Z80._r.m; Z80._clock.t += (Z80._r.m*4);
GPU.checkline();
if(Z80._stop)
{
jsGB.pause();
}
jsGB.dbgupdate();
}
};
window.onload = jsGB.reset;
window.onkeydown = KEY.keydown;
window.onkeyup = KEY.keyup;
</script>
</body>
</html>