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Floppy Controller

A project log for HP 4952A turned general purpose CP/M machine

Attempting to reverse engineer an HP 4952A into a general purpose z80 computer capable of running CP/M.

trevor-johansen-aaseTrevor Johansen Aase 12/29/2018 at 06:530 Comments

This is a dense little board. It has as the standard bits a floppy controller needs like the WD2793A which is the goto chip. The very interesting part is that this board has RAM, ROM aaaaaand a full 8088 x86 CPU. 

The 8088 is another one of those weird 32 bit processors with only an 8 bit bus. Makes me wonder if this board all by itself can be turned into an SBC. Heck, with more ram maybe it could run DOS all by itself?

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