Geometry Dash for the Nintendo Entertainment System

Open source development for Neo-Geo

an open source NES platformer game

Homebrew 65C02 computer on a backplane

The Kestrel is a family of home-made computers, built as much as possible on open-source technology, and supporting as much as possible the open-source philosophy.

GB303 wavetable-based TB-303 style synthesizer for the Nintendo Gameboy.

Natively running JVM bytecode on the Wii's Starlet

An easy-to-use, fast, tracker-based, public domain sound driver for Game Boy homebrew

Falling - A game for the NES

A simple Chip-8 interpreter for the Nintendo Gameboy Color.

Episode source code for the 8-bit Atari 2600 / VCS / Video Computer System, one of the pioneering home gaming consoles.

Support files for the book "Classic Game Programming on the NES"

Port of a famous shoot'em up arcade game of the 90's to MSX 2+ (Screen 11). Probably just a demo/POC

ISA 4Mb EMS expansion board

Various algorithms and other assorted pastries for the snes, mostly coprocessor stuff (SuperFX, DSP-1, SA-1 etc.)

8bit ISA NE2000-compatible network card based on the RTL8019AS chip

A modern replacement for the Nintendo 64's NUS-CNT serial communication chip.

Comprehensive API for Nintendo GBA inspired by HAMLib and HELlib.

One QR Ninjhax returns

Z80 libraries for the Sega Master System