73 Open Source Commodore 64 Software Projects

Commodore 64 emulator written in Rust

All you need to start programming 6510 assembler for the Commodore 64 on Microsoft Windows or Linux.

Millfork: a middle-level programming language targeting 6502- and Z80-based microcomputers and home consoles

A fast & simple MOS 6502 CPU emulator written in C++

tapuino

Tetris in 6502 for the Commodore 64

A Scala Commodore 64 & 128 emulator

Open Hardware 8Kb Cartridge for the Commodore 64

Cartridge for the Commodore 64 that packs a punch

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

A compiling BASIC dialect for the Commodore-64

Remake of the space shooter game Retaliate for the Commodore 64

high level programming language and compiler targeting 6502 machines such as the C-64 and CommanderX16

Protect your Commodore 64 from killer power supplies!

6502/Commodore64 Testing Framework for KickAssembler

A cross platform tool to convert images to c64 format.

Commodore-64 simulator in pure Python

cc65 library for accessing the DOS and network functions of the Ultimate II+ cartridge and Ultimate 64 motherboard

Playstation to Commodore Amiga/CD32 Controller Adapter

A Java framework for building highly customizable PETSCII-enabled BBS, accessible from Commodore 64/128

The source codes for running DeepSID, a modern online SID player for the High Voltage and Compute's Gazette SID collections.

VST plugin version of the WebSID Commodore 64 synthesizer

Open Hardware 16 KB Cartridge for the Commodore 64

A simple modulator replacement for Commodore 64s with "longboards", complements my Lumafix version as well adding an audio connector for second SID.

A Commodore 64 emulator in JavaScript

Open Hardware 2364-27xxx (E)EPROM Adapter PCB

Hardware design of Magic Desk compatible C64 cartridge up to 512k

A .Net-based Cross-Assembler for Several 8-Bit Microprocessors

volksFORTH is a 16bit Forth System maintained by the German Forth Gesellschaft e.V.

Fork of https://bitbucket.org/skoe/easyflash

An 4k intro for the Commodore 64

An easier to solder version of the Lumafix board, components spaced out a bit more to make things easier on the beginner (mostly meaning me). Can also be used to bypass noisy signals on motherboard, wireing directly to modulator replacement.

Safely connect your Sega Mega Drive/Genesis controllers to your Commodore 64 or Amiga

Notepad++ Syntax Highlighting for 6502 Assembly (and NESASM)

Kick assembler personalized version of the C=64 rev. 781220 Dead Test + more

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

C64 power supplies are ancient, they go bad every day so use protection!

Adventures into retro 8 bit Commodore 64 programming

Open Hardware Fast Loader cartridge for the Commodore 64 and 128

SidBerry - SID file player using a real SID 6581 chip and a RaspberryPi

Switchless kernal switcher for the common breadbin Commodore 64, "longboards". Reuses power LED for easier use.

A repository of C64 code from books and magazines published in the 80s and 90s

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

I wanted an alternative to the SD2IEC on my Commodore 64, and I almost instantly took a liking to Pi1541 software. I did however need to design a board for it and this was the end result - even includes beepers, OLEDs and two IEC connectors

Improve your retro gaming emulation experience by using the systems original controller.

A 3D maze game written in C for the Commodore 64

🤓🕹💾 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.

A multiplatform command line application to query csv files using a sql like syntax

The retro-computing systems

Commodore 64C schematics recreated in KiCad

A Commodore 64 Emulator in Pascal

Commodore 64 Chess

Some routines to handle a C64 sprite multiplexer

A curated list of software emulators and simulators of PCs, home computers, mainframes, consoles, robots and much more...

Sidekick64: A Versatile Software-Defined Cartridge for the C64, C128, C16, plus/4

SIDKick -- the first complete SID 6581/8580-drop-in-replacement that you can build yourself

source code for Worms? by David S. Maynard

A version of the DIAG64cart, this mainly changes components for the ones I've already got and adds a lot of LEDs. It's a blinkenlight project for diagnostic usage.

A library to play Commodore 64 music

I wanted a Pi1541 module that did not feel like I was handling bare electronics, so I made one that hides most of the scary bits (no 3d-printer required).

Wanted a joystick switcher for my Commodore 64, so I built one by adapting C64 Mega Switcher for use with Atari-style joysticks. Supports secondary fire-button when using Sega Master System gamepads, even includes an auto-fire circuit.

A fun language compiler for 8-bit systems (6502, 6510, Z80, Atari, Commodore, NES, ZX Spectrum, Atmos) with great optimization.

Visual Studio Code extension for C64 coding with Kick Assembler

the beauty of source code in Commodore 64 BASIC

👾 It's a SID chip synth for VCVRack!

Simple PCB for building a XUM1541, a device for copying data to and from Commodore 1541 disk drives using a modern computer.

Hardware design of Magic Desk compatible C64 cartridge up to 1024k

There are many Stereo SID boards, but this one in mine... Add a second SID of the same type or newer substitutes for adding stereo audio to your system...

A wiki to keep track of homebrew and unofficial hardware for retro computers and old consoles

Commodore 64 VIC-II 6567/6569 Replacement Project

Terminal 6502 Emulator with Commodore 64, Vic-20, PET 2001, and TED: C16, Plus/4

Awesome resources about Commodore world

vc64web - web based Commodore 64 Emulation