A JavaScript NES emulator.
forked from https://github.com/bfirsh/jsnes
'require' -> 'import/export'
see index.html
You can see RAM and VRAM in real time!
// Initialize and set up outputs
var nes = new jsnes.NES({
onFrame: function(frameBuffer) {
// ... write frameBuffer to screen
},
onAudioSample: function(left, right) {
// ... play audio sample
}
});
// Read ROM data from disk (using Node.js APIs, for the sake of this example)
const fs = require('fs');
var romData = fs.readFileSync('path/to/rom.nes', {encoding: 'binary'});
// Load ROM data as a string or byte array
nes.loadROM(romData);
// Run frames at 60 fps, or as fast as you can.
// You are responsible for reliable timing as best you can on your platform.
nes.frame();
nes.frame();
// ...
// Hook up whatever input device you have to the controller.
nes.buttonDown(1, jsnes.Controller.BUTTON_A);
nes.frame();
nes.buttonUp(1, jsnes.Controller.BUTTON_A);
nes.frame();
// ...JSNES is based on James Sanders' vNES, and owes an awful lot to it. It also wouldn't have happened without Matt Wescott's JSSpeccy, which sparked the original idea. (Ben, circa 2008: "Hmm, I wonder what else could run in a browser?!")