Original Apollo 11 Guidance Computer (AGC) source code for the command and lunar modules.

A running-jumping-swordfighting game I made on the Apple II from 1985-89

Disassembly of Pokémon Red/Blue

Learning assembly for Linux x86_64

Disassembly of Pokémon Crystal

BareMetal is a 64-bit OS for x86-64 based computers. The OS is written entirely in Assembly while applications can be written in Assembly, C/C++, and Rust.

A very minimal, resource efficient exo-kernel

Pure64 is a kernel/software loader for x86-64 systems.

Source code of GEOS 2.0 for the Commodore 64 and 128

sectorforth is a 16-bit x86 Forth that fits in a 512-byte boot sector.

©️ Concurrent Programming Library (Coroutine) for C11

Code for the 6502 microprocessor, mostly for the Replica 1 computer.

A bare-metal FORTH operating system for Raspberry Pi

The Operating System

Proto Language AsSeMbler for All (formerly Apple)

Introduction to x86-64 assembly

Pthreads-free Linux threading demo

Low level image processing library in pure Go with SIMD assembly

A Super Mario Compiler written in JavaScript

Native 32-bit colorForth for PCs, Bochs and Qemu.

Reconfigurable 16-bit Virtual CPU for 6502 computers

A rewrite of Wozmon in x86-64 for the BareMetal kernel.

Jonesforth RISC-V port.

64-bit implementation of Forth

Forth interpreter written in bare-metal assembly running on UEFI. (Unfinished)

Using FASM (the Flat assembler) cross-platform (OSX/Linux)

mxass, a cross assembler that targets Commodore 64-like platforms (6502/65816/Z80)