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Original Apollo 11 Guidance Computer (AGC) source code for the command and lunar modules.
The original sources of MS-DOS 1.25, 2.0, and 4.0 for reference purposes
the official Rust and C implementations of the BLAKE3 cryptographic hash function
bootOS is a monolithic operating system in 512 bytes of x86 machine code.
Soul of a tiny new machine. More thorough tests → More comprehensible and rewrite-friendly software → More resilient society.
The best C-like language that can be implemented in 10kLOC.
Micro Kernel / Bootloader for Ben Eater's 6502 Computer
Fully documented and annotated source code for Elite on the Nintendo Entertainment System (NES)
Pillman boot sector game, a yellow thing eats pills and is chased by monsters.
SPITBOL x64 provides raw power and speed for non-numeric computation on the x86_64 architecture
Just a backup of the very nice Richard W.M. Jones Forth interpreter
A 23-byte “hello, world” program assembled with DEBUG.EXE in MS-DOS
An on-going conversion of Scoopex's incredible Amiga Hardware Programming Series on YouTube into C
Native 32-bit colorForth for PCs, Bochs and Qemu.
The original Atari 400/800 6502 assembly code for the classic game Fort Apocalypse.
The Amiga OCS Demo Planet Rocklobster by Oxyron
AsMSX, originally developed by Pitpan. More info: https://www.msx.org/wiki/AsMSX.
Attempt to natively run JVM bytecode on the Wii's Starlet
Disassembled Source Code for the C64 game Iridis Alpha by Jeff Minter
Port of a famous shoot'em up arcade game of the 90's to MSX 2+ (Screen 11). Probably just a demo/POC
Configurable implementation of the Twofish block cipher for AVR 8-bit microcontrollers (ATtiny, ATmega)