A stand-alone, BASIC-programmable microcontroller and microcomputer in one! The fastest, cheapest, most hackable 8-bit computer ever.

This is a reconstruction of the original 1981-82 IBM PC BIOS source code using scanning and transcription of the BIOS listings found in the IBM Technical Reference manuals.

Open Hardware 8/16/32 Kb Cartridge for the Commodore 16, 116 and Plus/4

This is a small adapter, in the form of a daughter board, which fits into the socket of the "Sally" CPU of the Atari 800XL microcomputer. It replaces that CPU with a CMOS, modern, low-power, fully static, currently in production W65C02S and some auxiliary logic. The project has been featured in three videos in my YouTube channel ("The Byte Attic,"

Repository for information about setting up and using Sony NEWS workstations and NEWS-OS, Sony's Unix distribution from the late 1980s to the mid/late 1990s.

Reverse-engineering documentation about the Q1 microcomputers, the world's first true microcomputers (1972) with integrated microprocessors.

A virtual Atari ST disk over serial for Windows, Linux and macOS

Open Hardware 64 Kb RAM Expansion for the Commodore 16

User Port Cartridge for the Commodore 16, 116 and Plus/4

Timex Computer 2048 clone with 80KB RAM and PSG on board. Bill of Materials is available at

Draegerman for Agon Light and Console8

Internal 64 kB RAM Expansion for the Commodore 16

A BBC BASIC v3 port of the horror interactive fiction game coded for the Commodore 64 by Mark S. Boucher

Jotto 2020 is a word puzzle game that cleverly combines the game mechanics of the games, Jotto and Mastermind.

Timmy a'ka Harlequin 48K by Superfo

An AdLib card for your Commodore 16/116/+4!

NOMIS: a clone of the classic game SIMON for AgonLight and BBC BASIC SDL

Snac-Snake: a variant of the classic game Snake for AgonLight and BBC BASIC SDL

An original game inspired by tower defense games and Tetris

Remastered version of my 1993 arcade game Androidz