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

Collection of malware source code for a variety of platforms in an array of different programming languages.

File formats dissections and more...

Continuous Unix commit history from 1970 until today

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…

An introduction to ARM64 assembly on Apple Silicon Macs

An experiment.

Soul of a tiny new machine. More thorough tests → More comprehensible and rewrite-friendly software → More resilient society.

Ping-Pong-like game in Assembly that works without OS

The best C-like language that can be implemented in 10kLOC.

small stub that allows to run "bare" 64-bit PE binaries in DOS

The Amiga Diagnostic tool

A 16-bit Lisp based operating system.

Microsoft DOS 4.00

An implementation of the unix commands yes, cat, and echo in as few bytes of executable as possible

Assembler from scratch written in Ink, supporting ELF on x86_64 and more.

Official repository for 8086tiny: a tiny PC emulator/virtual machine

A basic presentation tool for the Apple ][ written in assembly.