Planet m68k
News around Motorola 68000 CPU computer systems

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News January 2021

ImHex - A hex editor for reverse engineers

ImHex is a sophisticated Hex editor that among other things, supports dissassembly of m68k and m680x binary files.

News December 2020

Video Recording: Vampire 4 "Stand-Alone" - First impression

The Vampire 4 SA is a Amiga compatible computer with an 68080 CPU in an FPGA from Apollo Accelerators running ApolloOS (a distribution of AROS - The AROS Research Operating System). The Vampire 4 SA can also boot into EmuTOS and Atari MiNT (Atari ST compatible).

Video Recording: A chat with Nick Desaulniers on compiling the Linux Kernel for m68k with LLVM

In this chat we've discussed the "ClangBuildLinux" ( Project. This project builds the Linux-Kernel with the LLVM compiler infrastructure. Now that Min-Yih Hsu has created the m68k backend for LLVM, it might be possible to compile the Linux-Kernel for m68k targets with the modern LLVM compiler infrastructure.

Nick Desaulniers explains the "ClangBuildLinux" Project, the reasons for building the Linux Kernel with LLVM, issues found in the Linux-Kernel through the LLVM code checker. Min-Yih Hsu joined in the chat to give information on the LLVM m68k backend.

Links from the December 2020 Chat

News November 2020

Links from the November 2020 Chat

Multi-Core M68K Machine


Alpha Micro

Video Recording: Chroot into m68k - a seamless m68k dev environment on Linux with Qemu

This video explains and demonstrates the QEMU user mode and how to setup an Linux m68k development environment that can seamlessly be used from an amd64 host.

With this environment, it is possible to write scripts that execute a mix of native (amd64) and emulated (m68k) commands. It is also possible to start the m68k environment inside a Linux container using systemd-nspawn.

QEMU user mode is a great addition to every cross development toolbox.

Video Recording: Qemu M680x0 support - by Laurent Vivier

Laurent Vivier talks about the existing QEMU Quadra 800 emulation and the linux-user mode. He does explain what are their limitations are, and then what a pure virtual machine can improve. He gives a demo that shows what the machine can do and how to use it. The demo shows live migration between Qemu instances, 9P file sharing between host and Qemu and running Linux m68k in Qemu with a XFCE GUI.

m68k Compiler explorer

  • George Nakos ( run, which is an independent instance of Matt Godbolt's compiler explorer ( that features quite a few 680x0 cross compilers, and a few native ones. It is mostly Atari 16/32 focused. People can also share code snippets using the share button, for example So far, it supports:
    • gcc 4.6.4, 4.9.4, 5.4.0, 6.2.0, 7.1.0, 7.2.0, 7.3.0,, 8.1.0, 8.2.0, 8.3.0, 9.1.0, 9.2.0, 9.3.0, 10.1.0, 10.2.0, as well as a special version of 4.6.4 that has fastcall support.
    • g++ (same versions as above)
    • Clang 11
    • vbcc 0.9f
    • DICE 3.15
    • cc68 5.1
    • sozobon 2
    • Pure C (Atari 16/32 compiler, provided via an emulation layer which runs the actual 68000 compiler)
    • Turbo C (same as above)
    • GNU Fortran
    • fpc 3.3.1
    • vasm 1.8c
    • rmac 1.13.1

News October 2020

  • Joshua Stein started a video series on development on and for MacOS system 6:

    I've been writing an IMAP client for and on my Mac 512Ke over the past many weeks. Taking inspiration from Andreas Kling's excellent YouTube videos documenting his development of the Serenity operating system, I thought I'd start screencasting some of my work.

    This video is the first of hopefully many and presents a quick introduction to System 6, HFS resource forks, THINK C 5.0, and a look at some of the progress of my IMAP client so far.

News September 2020

Gopher Client for the AMOS OS running on Alpha Micro machines

  • Cameron Kaiser has released a gopher client for AMOS OS on Alpha Micro by hacking its TCP client suite:
  • The Alpha Micro machines were based on various 68K CPUs but notable that they were multiuser business "mini minis" and actually run the 68K in little-endian mode for compatibility with their previous architecture's data files. General information: (hosted on an Alpha Micro Eagle 300, a 1994 system with a 68EC030)

Links and Notes from the September chat:

EmuTOS Release 1.0   Atari Amiga

after almost 20 years of development the EmuTOS project reached the version number 1.0. EmuTOS is a Free operating system for computers based on Motorola 680x0 or ColdFire microprocessors. It features functionality similar to TOS, which powered the Atari ST and its successors between 1985 and 1994.

  • Major changes:
    • BIOS: Add keyboard mapping for Spanish keyboard
    • BIOS: Change Spanish character set to Atari ASCII, like Atari TOS
    • BIOS: Improve joystick compatibility with Atari TOS
    • EmuDesk: Implement "Search""Cycle windows""Select all items" in File menu
    • EmuDesk: Implement "Size to Fit" in View menu
    • EmuDesk: Implement "Cache" in Options menu
    • EmuDesk: Add user-modifiable shortcuts for desktop menu items
    • VDI: Add support for Atari GDOS
    • VDI: Fix spacing and positioning of outlined text
    • VDI: Improve text output quality for special effects
    • VDI: Underline text within character cell if possible, like Atari TOS
    • General: Add Polish language support
    • General: Generate language-specific ROMs for PAK 68/3 hardware
  • Website and Download:

Video Recording: Amitari - Atari Software on Amiga Hardware   Atari Amiga EmuTOS

Recording from the chat on 21st August 2020:

News August 2020

AT&T Unix on m68k Hardware emulator   Unix Retro

neozeed had success in running the C-Compiler of AT&T Unix on the FreeBee Emulator (emulating a AT&T 3B1 machine, patched version of the emulator Now it is possible to compile new software for these interesting old Unix systems:

Hardware fix for the ZZ9000 graphics card and new firmware and tools   Amiga

The ZZ9000 graphics card from MNT (revision R-1 and R-2) has a design error that shorts the 1V8 and 3V3 supply voltage rails of the ZYNQ module, causing the ZYNQ module to overhead.

In his blog article "The first cut is the deepest!", Stefan Reinauer explains how he found and fixed the issue.

MNT has published a document on about the fix.

In addition, the MNT ZZ9000 Firmware 1.7.0 Beta 2 is now available along with a new version of ZZTop (AmigaOS tool for ZZ9000 diagnostics).

Haiku on m68k   Haiku NeXT

Francois Revol has re-started work on his port of the HaikuOS to the Motorola 68000 architecture. Recent progress Older status reports on

NetBSD on Mac68K   NetBSD Mac68K

Not new, but rediscovered in August: Rob Braun has some interesting notes on booting NetBSD/m68k on a Mac Centris 650. His Webpage also has some interesting system tools for classic MacOS.

News July 2020

Porting EmuTOS to an FPGA based m68k board   FPGA EmuTOS

Lawrence Manning is porting EmuTOS to his FPGA based m68k board. He is documenting the bring-up in his blog at

Links from the July online chat   Meeting

News June 2020

Freemint on ARAnyM   AtariST EmuTOS

Vincent Riviere created a video (over 1 hour) showing ARAnyM + EmuTOS + FreeMiNT + fVDI + XaAES + Tera Desktop:

The video is in french language with english subtitles.

Resurrecting GEM for the Apple Lisa   GEM EmuTOS AppleLisa

Rob Mitchelmore is trying to get GEM working (again) on the Apple Lisa. He got release GEMDOS 1.1 running, based on the GEMPORT kit's Lisa BIOS and the GEMDOS 1.1 sources, and it is self-hosting: EmuTOS Mailing List Thread

m68k backend for LLVM has been finished   LLVM Debian Linux

John Paul Adrian Glaubitz reports that the m68k backend for LLVM has been finished. It has not been merged upstream yet (that will take some time), but it should be usable now. Adrian is currently test-building it on Debian/m68k and it is asking for help finding issues:


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Date: 2020-11-17 Tue 00:00

Author: Planet m68k Team

Created: 2021-01-17 Sun 19:39