The Motorola 68000

I got into Motorola 680x processors first, and from there the obvious path was the 68000.

Soon after the 68000 came out, Byte ran articles on not only the processor but also the computers that used it -- foremost the Apple Macintosh, but also the Amiga, Atari ST, Corvus Concept, Fortune 32:16 and others. When I started studying at the University of Stellenbosch in 1985, I found the Byte shelf in the Engineering Library, and my studies diverged somewhat from what the lecturers were trying to teach me.

Design Philosophy Behind Motorola's MC68000, part 1, part 2 and part 3.

Homebrew 68000

My first 68000 system was homebrewed on three Eurocards. Read about it here.

Quelo assembler

I've been using the Quelo assembler which I downloaded from somewhere. Here's a local copy QUELOASM.ZIP.

This assembler can be used to assemble the tutornew monitor mentioned in the comp.sys.m68k FAQ -- I get a bit-identical image so things obviously work right.

My notes on using the Quelo crossassembler.


I've also played with EASy68K which does provide an IDE Integrated Development Environment) but I prefer the Quelo assember.


WinHex is a Windows hex viewer / editor. It can join two ROM (Hi/Lo) files into a single binary. Tools -> File tools -> Unify -> Bytewise. File 1 is Hi, File 2 is Lo.


Peter Stark wrote HUMBUG for the 6809 and 68000. It's free for non-commercial use by accepting this agreement.

Linux 68K

Steve over at Big Mess o' Wires made Linux run on a solderless breadboard 68008 (!).

68000 on the Apple

Some links and stuff:

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