Frontend: http://riperiperi.github.io/amebo/

amebo is a javascript Gameboy Colour emulator (DMG/GBC). The future focus is to improve accuracy and clean up the API while maintaining solid performance on relevant devices.

Using amebo

You can instantiate a gameboy object in the following manner:

gameboyObj = new gb('yourROM.gb', canvas);

The gameboy object exposes a number of properties, but the most important ones are

gameboyObj.paused = true; //you can pause the emulation this way
gameboyObj.reset(); //resets the console
gameboyObj.saveState(); //saves the current state into a JSON object and returns it.
gameboyObj.loadState(state); //loads the specified state.

gameboyObj.loadROM(url, pauseAfter); //used to load a ROM from an url
gameboyObj.loadROMBuffer(buffer, battery); //load a rom from an ArrayBuffer

gameboyObj.onload = func; //calls this when the ROM loads
gameboyObj.onstart = func; //calls this when the ROM starts emulating

gameboyObj.setButtonByte(b); //sets the input byte to the specified value. 
gameboyObj.prepareButtonByte(); //called internally to generate the next input. Overwrite this with something that uses the above to implement a custom input system.

Mobile Frontend

In addition to the desktop frontend included above, I also made an experimental mobile frontend targetted at the webapp functionality for iOS safari. To try it out, simply go to this url and add to homescreen: http://riperiperi.github.io/amebo/iphone.html

GBS Player

This repo also contains a .gbs audio player that uses amebo to provide its emulation. http://riperiperi.github.io/amebo/gbsplayer.html

Features:

• DMG/CGB mode
• Heavily Optimized (no asm.js tho)
• Customizable controls
• Savestates
• Saves using localStorage
• Cycle Accurate Instruction Timings
• Realtime audio emulation using the Web Audio API
• Mobile Client: http://riperiperi.github.io/amebo/iphone.html , runs full speed on iPhone 5 and up
• RUNS POKEMON! (obviously the most important feature)

In future:

• Instruction memory timings
• OAM bug
• Cycle accurate display timings
• Display behaviour during write to VRAM while busy
• Wave RAM bug (DMG)
• Boot w/o bios
• Super Gameboy mode
• Downsample audio from high frequency/generate antialiased waves
• IDE for assembling and debugging gameboy programs.