fengb/fundude

---

fengb/fundude.json

{
  "createdAt": "2019-03-20T23:23:56Z",
  "defaultBranch": "master",
  "description": "Gameboy emulator: Zig -> wasm",
  "fullName": "fengb/fundude",
  "homepage": "https://fengb.github.io/fundude/",
  "language": "Zig",
  "name": "fundude",
  "pushedAt": "2021-11-07T05:29:47Z",
  "stargazersCount": 195,
  "topics": [
    "gameboy-emulator",
    "wasm",
    "zig"
  ],
  "updatedAt": "2025-11-24T20:11:11Z",
  "url": "https://github.com/fengb/fundude"
}

![FUN DUDE]!(web/logo.svg)
🚧 Under Construction 🚧

Game compatibility

Perfect emulation:

• none

Playable:

• Tetris
• Super Mario Land
• Bionic Commando
• Pokemon Red/Blue
• Kirby’s Dreamland
• Dr. Mario
• Zelda: Link’s Awakening

Implementation details

CPU	some bugs, incorrect instruction durations
Video	mostly working — render hacks
Joypad	should work
Timer	untested, poor timing
Interrupts	untested
Serial	❌
Audio	❌

Development

Dependencies:

• zig 0.6.0+
• node.js 10.0.0+

# Pull down this project
$ git clone https://github.com/fengb/fundude.git
$ cd fundude

# Build the wasm -- release-safe increases performance by >10x compared to the default debug mode
$ zig build -Drelease-safe

# Start the server
$ yarn install
$ yarn dev