[vcf-midatlantic] changing my bus route

Jonathan Chapman lists at glitchwrks.com
Thu Jan 13 14:24:34 UTC 2022

> It was long enough ago details a fuzzy but my memory is it wasn't that
> hard to implement the interface.

It's definitely more complicated than S-100, though. I don't believe it's required for basic operation, but Multibus has greater multi-master (DMA) support and is significantly better designed than S-100. You do also have the "do whatever on the P2 connector" factor, if you're wanting compatibility with other boards.

I probably wouldn't recommend Multibus for a first-time project...or really any bus for that matter. If this is the very first computer you've designed and built by hand, do it on a big chunk of protoboard as a single-board computer. Perhaps even hold off on floppy disk support and whatnot and just wire up a "trainer" type board: CPU, ROM, some quantity of ram, serial port, parallel port, and that's it. You'll learn a lot that will prepare you to learn a lot more when you go to do a full-featured system!


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