Top 42 retrocomputing open source projects

A collection of BASICODE programs by various authors

3D models and additional files for the project Commodore PET Mini

MOS 6502 emulator written in Rust

A Terminal Based Chip-8 Emulator

Assembling Microsoft GW-BASIC from 1983, with MASM or JWasm • "pre-release" binaries at https://github.com/tkchia/GW-BASIC/releases • source mirror at https://gitlab.com/tkchia/GW-BASIC • fork of https://github.com/dspinellis/GW-BASIC

turns out I like bitmap fonts

SE Basic IV 4.2 Cordelia - A free BASIC interpreter written in Z80 assembly language

🤓🕹💾 This hobby project contains software implementations of old microprocessors and complete computer systems. I'm very interested in retrocomputing and this is how I learn about the inner workings of these old, classic and amazing computers and game consoles.

4 MB Fast RAM Expansion for the Commodore Amiga 600

KiCad schematics and gerbers for a YM sound card for the RC2014. See it in action here: https://www.youtube.com/watch?v=-iLwi9FagFE

A Javascript scripting engine for DOS

Control Amiga add-on boards through mouse buttons

16bit retro programming in DosBox with Borland C++ 3.1, Turbo Pascal 7 and TASM

Commodore 16 schematics and PCB, redrawn in Kicad

The IBM PS/1 emulator.

Convertron3000 commodore 64 graphics converter

Fully documented and annotated source code for the disc version of Elite on the BBC Micro

6809 and OS-9 emulator in Java

An ESP8266 based RS232 <-> WiFi modem with Hayes AT style commands and LED indicators

Revengineered ancient PDP-11 CPUs, originals and clones

A cross platform tool to convert images to c64 format.

FPGA Verilog implementation of 1949 EDSAC Computer with animated tape reader, panel, teleprinter and CRT scope

UKNCBTL is emulator of Elektronika MS 0511 (UKNC), soviet computer based on two PDP-11 compatible processors.

Intel 8080/Zilog Z80 assembler written in D.

MT32-PI.EXE/MT32-PI.TTP/mt32-pi-ctl is a control program for the mt32-pi MIDI synthesizer available for DOS PCs, Atari ST and Amiga computers as well as modern systems running Linux and Windows.

PDP-6 Emulator

BKBTL emulator, Win32 version.

Clash implementation of the Compucolor II home computer

Move your Amiga 2000 CPU to the Coprocessor slot!

Mandelbrot set drawers for vintage hardware

C64 Christmas Demo in 6510 Assembly

3DO M1 Opera Portfolio Operating System

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

Open Hardware 1 MB Chip RAM Expansion for the Commodore Amiga 600 Computer

Free open-source compressor for apLib with 5-7% better ratios

Toy project that re-implements bits of AppKit for classic MacOS 9 on 680x0 (and emulated on PowerPC) using Metrowerks CodeWarrior Pro 6's MWObjC Objective-C compiler.

Create DOS programs with Zig

retrohunblog

The Eight Bit Algorithmic Language for Apple II, Commodore 64 and VIC20

64tass - cross assembler for 6502 etc. microprocessors - by soci/singular - [git clone from the original sourceforge repo]

Tools for working with monochrome bitmap fonts

Awesome Lists of retrocomputing resources (6502, Apple 2, Atari, ...)