A JavaScript NES emulator.
It's a library that works in both the browser and Node.js. The browser UI is available at https://github.com/bfirsh/jsnes-web.
For Node.js or Webpack:
$ npm install jsnes
(Or yarn add jsnes
.)
In the browser, you can use unpkg:
<script type="text/javascript" src="https://unpkg.com/jsnes/dist/jsnes.min.js"></script>
// Initialize and set up outputs
var nes = new jsnes.NES({
onFrame: function(frameBuffer) {
// ... write frameBuffer to screen
},
onAudioSample: function(left, right) {
// ... play audio sample
}
});
// 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();
// ...
To build a distribution:
$ yarn run build
This will create dist/jsnes.min.js
.