jsGB

jsGB: A GameBoy emulator in JavaScript

jsGB is an interpretive emulator of the GameBoy, designed to be run from within a web browser. Yes, it's written in JavaScript.

Current status:

• The emulator is currently hard-coded to load a particular ROM; it should be possible at some point to develop a fancy dialog for display and loading of the ROMs available at the server.
• CPU: Emulated, including the CB-page opcodes. There are likely to be opcodes in the standard lists that are missing, and the "undocumented" ops will be missing.
• Graphics: Backgrounds and sprites emulated, windows missing.
• Keypad: Working.
• Timer: Untested.
• Interrupts: VBlank and timer emulated.
• Sound: Missing.

Tested browsers:

• FireFox 3.6
• Opera 10

Acknowledgements:

• Pan/ATX, nocash et al: Padocs DMG specification document
• Sean Young, Vrije University: Z80 opcode map
• Mostek Inc: Z80 timings
• Pat Fagan: Diffsheet from Z80 to GameBoy Z80
• Kevin Matney, UIUC: Microscopic dump of DMG BIOS
• Arvidsson, Eklund, Murphy: ExCanvas for IE
• Andy Na: XHR binary file transfer