Category Archives: 68K

68000 SBC bring up

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Five MINI000 boards arrived just after Christmas. Annoyingly I got stung for the import duty, but fair enough. They were still very cheap! The quality looks fantastic, though its hard to tell from a camera-phone shot: The following was done over the course of a few weeks. Unlike the MAXI09 board bringup, I took my time and found I enjoyed… Read more »

Designing a 68000 SBC

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I have decided to be a little brave and have opted to build a 68000 SBC instead of one based off a 68008. Specification wise it is similar to the 68020 design: 68000 clocked at 16MHz 1MB static RAM (2 x AS6C4008 (PDF)) 64KB EEPROM (2 x AT28C256 (PDF)) DUART (XR88C681 or, in its place, a SC2681 (PDF))) Expansion connector… Read more »

Being sensible: a 68008 computer on breadboard

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After writing about building a 68020 computer I feel slightly silly for going back on my word: I have built up a 68008-based computer on breadboard. For one thing going right to a 68020 felt a bit like I’d be missing out; the pleasure is in exploring not the end result. I’d have left out on the other MPUs in… Read more »

Design of a 68020-based SBC

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My interest in the 68000 family of MPUs stems from two things: it’s use in my all time favourite computer, the Amiga. And the fact that it’s generally considered a very clean design compared to its then main competition. Not that this is a high bar; anything prior to the 386 is dreadful and the later CPUs are not much… Read more »