Disassembly (CA65) of the Commodore 64 port of the seminal space-sim Elite, by Ian Bell / David Braben.

Episode source code for the 8-bit Atari 2600 / VCS / Video Computer System, one of the pioneering home gaming consoles.

The replacement board for the AY-3-8910/AY-3-8912/YM2149F sound chip. Compatible with https://www.avray.ru project firmware.

57600 bps Commodore 64 PETSCII terminal implementing the Turbo56K protocol

A modern-day ZX Spectrum OS rewritten from scratch in ARM assembly (aarch64) to run natively on Raspberry Pi 400

Forth for the ZX Spectrum

Gameboy development examples and tools

🕹️ Ported Desolate game from TI-83 Plus to ZX Spectrum

A general purpose ASM libriary for the Apple II. Assembled in Merlin 8 Pro

Retro UNIX v1 (8086 port/derivation of Original UNIX v1 for PDP-11) and Retro UNIX 386 v1.? OS project

Various routines for programming graphics and games on MSDOS and PC-compatible 16-bit systems

Amstrad CPC Edition of "10 PRINT" maze generator challenge (12 bytes)

Software, utilities and documentation for the Z80-based NASCOM2 computer

mc68008 SBC

The Uni Games, a Commodore 64 game

MSDOS 1.25-2.11-3.3-5.0-6.0-6.22 and PCDOS 7.1 (derived, redeveloped) KERNEL (and COMMAND.COM) source code in NASM syntax

Reverse engineered Apple II products

Demake of MK1 for the NES

A video converter/video player for SGDK

An aquarium simulator for NES