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

Hello world in every computer language. Thanks to everyone who contributes to this, make sure to see contributing.md for contribution instructions!

File formats dissections and more...

Continuous Unix commit history from 1970 until today

the official Rust and C implementations of the BLAKE3 cryptographic hash function

Dozens of minimal operating systems to learn x86 system programming. Tested on Ubuntu 17.10 host in QEMU 2.10 and real hardware. Userland cheat at: https://github.com/cirosantilli/linux-kernel-modu…

Disassembly of Pokémon Red/Blue

The fastest and safest AV1 encoder.

CPU miner for Litecoin and Bitcoin

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

Monospaced bitmap fonts

Architectural privilege escalation on x86

An AV1 decoder in Rust.

Micro Kernel / Bootloader for Ben Eater's 6502 Computer

Alice type ergo keyboard using only THT parts

The source from my Commodore 64 assembly programming tutorial for Windows

Restoration of 1st Edition UNIX kernel sources from pdf document.

A Slack client for the Commodore 64

simple mechanical macropad case

A simple Z80 monitor for use over a 6550 UART

Display file contents in hexadecimal and ASCII.