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

An introduction to ARM64 assembly on Apple Silicon Macs

bootOS is a monolithic operating system in 512 bytes of x86 machine code.

A 54 bytes snake game in assembly

Disassembly of Legend of Zelda: Links Awakening DX

Windows x64 handcrafted token stealing kernel-mode shellcode

Fully documented and annotated source code for Elite on the Commodore 64

💾 A tiny and mighty boot sector OS

Ray Tracer in 483 bytes (x86 boot sector)

Tiny assembler for 8086/8088, able to run over DOS for 8086/8088 machines.

Christmas tree demo on bare PC hardware (no OS), in 16-bit assembly

Fully documented and annotated source code for Lander on the Acorn Archimedes