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

A FREE comprehensive reverse engineering tutorial covering x86, x64, 32-bit/64-bit ARM and embedded RISC-V architectures.

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

mal - Make a Lisp

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

A FPGA friendly 32 bit RISC-V CPU implementation

Disassembly of Pokémon Crystal

OS for z80 calculators

A tiny bootable Minecraft clone written partly in x86 assembly

A very minimal, resource efficient exo-kernel

Arithmetic calculator in x86 assembly

The open-source city-building game for Game Boy Color.

Program the esp32 ULP coprocessor in Arduino

RPN calculator app for TI-83 Plus and TI-84 Plus inspired by HP-42S