There are 5 repositories under 68000 topic.
SGDK - A free and open development kit for the Sega Mega Drive
A latency-hating emulator of 8- and 16-bit platforms: the Acorn Electron, Amstrad CPC, Apple II/II+/IIe and early Macintosh, Atari 2600 and ST, ColecoVision, Enterprise 64/128, Commodore Vic-20 and Amiga, MSX 1, Oric 1/Atmos, Sega Master System, Sinclair ZX80/81 and ZX Spectrum.
PCM Hammer & PCM Logger, tools for General Motors Powertrain Control Modules (PCMs).
Free open-source compressor for apLib with 5-7% better ratios
A collection of development tools targetting SEGA's SVP chip found in the Mega Drive/Genesis version of Virtua Racing.
A short casual adventure game for the Sega Genesis written in 68000 assembly
volksFORTH is a 16bit Forth System maintained by the German Forth Gesellschaft e.V.
Sound driver for Sega Mega Drive
Assorted compression formats for the Sega Mega Drive
Super fast DMA queue for the Sega Genesis
Various AtariST/STE stuff
rom hack for Arcade mame mess sfc snes sega md neogeo romhacking
68000 assembly tutorials for Atari ST by perihelion of poSTmortem
build a toolchain for cross developement. Supports motorola m68k-elf, avr and arm-none-eabi
Some of the Amiga sources i´ve written in the past millenium
Forth system for M68K machines, origin: http://hardcode.de/us/index.html
Heavily-modified SMPS 68k Type 1b sound driver
The 3D engine from the book "Amiga Real-Time 3D Graphics"
An emulator for various m68k and z80 based computers, written in Rust. Currently it has support for the Sega Genesis, TRS-80, and Computie (my own project), with Macintosh support in the works
Exhaustive BCD Verifier Sega Genesis ROM for the M68000 processor
Debugger/error screen for Sega Genesis
Project to learn how to implement a game engine for the Sega Genesis/Mega Drive.
Changes the orientation of a 68000 DIP CPU
A repository dedicated to Amiga stuff, programming, music, etc..
68Kemu is a CPU emulator for Atari TOS/MiNT operating systems. It allows running standard 68000 software using an emulated 68000 CPU, while the OS itself still runs using the native CPU. This provides the best compromise between compatibility and speed.
Motorola 68000 Series Assembly Language Support for IntelliJ-based IDEs
AncientXinu: Early Xinu / Xinu68k releases