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index.html
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<!DOCTYPE html>
<html>
<head>
<script type="text/javascript" src="build/nes.js"></script>
<script type="text/javascript">
var nes;
// buttons status update methods
/**
*
*/
function init() {
document.getElementById('loadROMButton').disabled = false;
document.getElementById('dumpROMButton').disabled = true;
document.getElementById('dumpRegButton').disabled = true;
document.getElementById('dumpRAMButton').disabled = true;
document.getElementById('dumpVRAMButton').disabled = true;
document.getElementById('dumpSPRRAMButton').disabled = true;
document.getElementById('stopButton').disabled = true;
document.getElementById('stepButton').disabled = true;
document.getElementById('resumeButton').disabled = true;
}
/**
*
*/
function ROMloaded() {
document.getElementById('loadROMButton').disabled = true;
document.getElementById('dumpROMButton').disabled = true;
document.getElementById('dumpRegButton').disabled = true;
document.getElementById('dumpRAMButton').disabled = true;
document.getElementById('dumpVRAMButton').disabled = true;
document.getElementById('dumpSPRRAMButton').disabled = true;
document.getElementById('stopButton').disabled = true;
document.getElementById('stepButton').disabled = true;
document.getElementById('resumeButton').disabled = true;
}
/**
*
*/
function NESran() {
document.getElementById('loadROMButton').disabled = true;
document.getElementById('dumpROMButton').disabled = true;
document.getElementById('dumpRegButton').disabled = true;
document.getElementById('dumpRAMButton').disabled = true;
document.getElementById('dumpVRAMButton').disabled = true;
document.getElementById('dumpSPRRAMButton').disabled = true;
document.getElementById('stopButton').disabled = false;
document.getElementById('stepButton').disabled = true;
document.getElementById('resumeButton').disabled = true;
}
/**
*
*/
function NESstopped() {
document.getElementById('loadROMButton').disabled = true;
document.getElementById('dumpROMButton').disabled = false;
document.getElementById('dumpRegButton').disabled = false;
document.getElementById('dumpRAMButton').disabled = false;
document.getElementById('dumpVRAMButton').disabled = false;
document.getElementById('dumpSPRRAMButton').disabled = false;
document.getElementById('stopButton').disabled = true;
document.getElementById('stepButton').disabled = false;
document.getElementById('resumeButton').disabled = false;
}
//
/**
*
*/
function loadRom() {
var url = document.getElementById('romList').selectedOptions[0].value;
var request = new XMLHttpRequest();
request.responseType = 'arraybuffer';
request.onload = function() {
putMessage('Loading done.');
run(request.response);
};
request.onerror = function(e) {
putMessage('failed to load.');
};
request.open('GET', url, true);
request.send(null);
putMessage('')
putMessage('Loading rom image...')
ROMloaded();
}
/**
*
*/
function run(buffer) {
try {
var rom = new NesJs.Rom(buffer);
} catch(e) {
putMessage('');
putMessage(e.toString());
return;
}
putMessage('');
putMessage('Rom Header info');
putMessage(rom.header.dump());
nes = new NesJs.Nes();
nes.addEventListener('fps', function(fps) {
document.getElementById('fps').innerText = fps.toFixed(2);
});
nes.setRom(rom);
nes.setDisplay(new NesJs.Display(document.getElementById('mainCanvas')));
try {
nes.setAudio(new NesJs.Audio());
} catch(e) {
putMessage('');
putMessage('Disables audio because this browser does not seems to support WebAudio.');
}
window.onkeydown = function(e) { nes.handleKeyDown(e); };
window.onkeyup = function(e) { nes.handleKeyUp(e); };
putMessage('');
putMessage('bootup.');
nes.bootup();
putMessage('runs.');
NESran();
nes.run();
}
// put message methods
/**
*
*/
function putMessage(str) {
var area = document.getElementById('dump');
area.firstChild.appendData(str + '\n');
area.scrollTop = area.scrollHeight;
}
// push button handlers
/**
*
*/
function pushDumpROM() {
putMessage(nes.dumpRom());
}
/**
*
*/
function pushDumpReg() {
putMessage(nes.dumpCpu());
putMessage(nes.dumpPpu());
}
/**
*
*/
function pushDumpRAM() {
putMessage(nes.dumpRam());
}
/**
*
*/
function pushDumpVRAM() {
putMessage(nes.dumpVRam());
}
/**
*
*/
function pushDumpSPRRAM() {
putMessage(nes.dumpSprRam());
}
/**
*
*/
function pushStopButton() {
nes.stop();
putMessage('stopped.');
NESstopped();
}
/**
*
*/
function pushStepButton() {
nes.runStep();
putMessage(nes.dumpCpu());
}
/**
*
*/
function pushResumeButton() {
nes.resume();
putMessage('resumed.');
NESran();
}
// press/release pad button handlers
/**
*
*/
function pressPadButton(key) {
if(nes === undefined)
return;
nes.pad1.pressButton(key);
}
/**
*
*/
function releasePadButton(key) {
if(nes === undefined)
return;
nes.pad1.releaseButton(key);
}
// drag/drop handlers
/**
*
*/
function dragOverHandler(e) {
e.preventDefault();
}
/**
*
*/
function dropHandler(e) {
e.preventDefault();
var reader = new FileReader();
reader.onload = function(e) {
putMessage('Loading done.');
run(e.target.result);
};
reader.onerror = function(e) {
for(var key in reader.error) {
putMessage(key + '=' + reader.error[key]);
}
};
reader.readAsArrayBuffer(e.dataTransfer.files[0]);
putMessage('')
putMessage('Loading rom image...')
}
window.addEventListener('drop', dropHandler, false);
window.addEventListener('dragover', dragOverHandler, false);
</script>
</head>
<body onload="init()">
<p>
<select id="romList">
<option value="./roms/nestest.nes">nestest</option>
<option value="./roms/Sgt. Helmet - Training Day (2013)(The Mojon Twins)[!].nes" selected>Sgt. Helmet</option>
<option value="./roms/pong1k.nes">pong1k</option>
<option value="./roms/The Invasion.nes">The Invasion</option>
<option value="./roms/mguard.nes">mguard</option>
</select>
<button id="loadROMButton" onclick="loadRom()">load rom</button><br />
Select rom from the list or drag and drop your own rom into this window to start.
</p>
<p>
<canvas id="mainCanvas" width="256" height="240"
style="border:1px solid black; width:512px; height:480px;"></canvas>
<span id="fps"></span> fps
</p>
<div>
<table>
<tr>
<td></td>
<td><button id="pad1_4" onmousedown="pressPadButton(NesJs.Joypad.BUTTONS.UP)"
onclick="releasePadButton(NesJs.Joypad.BUTTONS.UP)">U</button></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr>
<td><button id="pad1_6" onmousedown="pressPadButton(NesJs.Joypad.BUTTONS.LEFT)"
onclick="releasePadButton(NesJs.Joypad.BUTTONS.LEFT)">L</button></td>
<td></td>
<td><button id="pad1_7" onmousedown="pressPadButton(NesJs.Joypad.BUTTONS.RIGHT)"
onclick="releasePadButton(NesJs.Joypad.BUTTONS.RIGHT)">R</button></td>
<td></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr>
<td></td>
<td><button id="pad1_5" onmousedown="pressPadButton(NesJs.Joypad.BUTTONS.DOWN)"
onclick="releasePadButton(NesJs.Joypad.BUTTONS.DOWN)">D</button></td>
<td></td>
<td><button id="pad1_2" onmousedown="pressPadButton(NesJs.Joypad.BUTTONS.SELECT)"
onclick="releasePadButton(NesJs.Joypad.BUTTONS.SELECT)">SELECT</button></td>
<td><button id="pad1_3" onmousedown="pressPadButton(NesJs.Joypad.BUTTONS.START)"
onclick="releasePadButton(NesJs.Joypad.BUTTONS.START)">START</button></td>
<td><button id="pad1_1" onmousedown="pressPadButton(NesJs.Joypad.BUTTONS.B)"
onclick="releasePadButton(NesJs.Joypad.BUTTONS.B)">B</button></td>
<td><button id="pad1_0" onmousedown="pressPadButton(NesJs.Joypad.BUTTONS.A)"
onclick="releasePadButton(NesJs.Joypad.BUTTONS.A)">A</button></td>
</tr>
</table>
</div>
<p>
<div>
<button id="dumpROMButton" onclick="pushDumpROM()">dump ROM</button>
<button id="dumpRegButton" onclick="pushDumpReg()">dump CPU/PPU reg</button>
<button id="dumpRAMButton" onclick="pushDumpRAM()">dump CPU RAM</button>
<button id="dumpVRAMButton" onclick="pushDumpVRAM()">dump PPU VRAM</button>
<button id="dumpSPRRAMButton" onclick="pushDumpSPRRAM()">dump PPU SPRRAM</button>
<button id="stopButton" onclick="pushStopButton()">stop</button>
<button id="stepButton" onclick="pushStepButton()">step</button>
<button id="resumeButton" onclick="pushResumeButton()">resume</button>
</div>
<textarea id="dump" cols="128" rows="16" readonly="readonly"> </textarea>
</p>
<p>
Thanks for the public domain NES roms.
</p>
<ul>
<li><a href="http://pdroms.de/category/nintendoentertainmentsystem">http://pdroms.de/category/nintendoentertainmentsystem</a></li>
<li><a href="http://slydogstudios.org/index.php/1k-series/">http://slydogstudios.org/index.php/1k-series/</a></li>
<li><a href="http://www.mojontwins.com/juegos_mojonos/sgt-helmet-training-day-nes/">http://www.mojontwins.com/juegos_mojonos/sgt-helmet-training-day-nes/</a></li>
</ul>
<p>
<a href="https://github.com/takahirox/nes-js">Source code at GitHub</a>
</p>
</body>
</html>