Expansion board for the MEGA65 R3+ Main Boards

A UNIX-like kernel for the i386 architecture

Modularised MEGAphone Design

Open-source instant messaging server that makes classic AIM and ICQ clients work again.

PS/2 keyboard/mouse converter for old Silicon Graphics computers.

Python code for interfacing with Elite for the BBC Micro

ESP8266/ESP32/Arduino custom modem<->internet simulator with lots of features

High performance UI layout library in C.

Fully documented and annotated source code for Angus Duggan's Elite-A on the BBC Micro

Fully documented and annotated source code for Elite on the Commodore 64

Command-line program to download videos from YouTube.com and other video sites

CP/M for the 6502

Truly independent web browser

Unicorn CPU emulator framework (ARM, AArch64, M68K, Mips, Sparc, PowerPC, RiscV, S390x, TriCore, X86)

Replacement boot ROM for the NABU Personal Computer

Replacement boot ROM for the NABU Personal Computer

Double the clock speed of Z80 in C128

Double the clock speed of Z80 in C128

FreeDOS kernel - implements the core MS-DOS/PC-DOS (R) compatible operating system. It is derived from Pat Villani's DOS-C kernel and released under the GPL v2 or later. Please see http://www.freed…

FreeDOS Command Shell (command.com)

Sokoban game implemented in sed

Reference documentation for the o65 file format

General-purpose programming language and toolchain for maintaining robust, optimal, and reusable software.

A flexible distributed key-value datastore that is optimized for caching and other realtime workloads.

DOOM Open Source Release

Optimizing Small memory C Compiler Assembler and Runtime for C64

A disk operations and at hyppo level device manager

Super Simple SDR Receiver

An action game for the Mega65