STEbus Z80

Z80 processor board renovation

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Renovation of a tried and tested commercial design. Not my own design!

I have the manual and circuit diagram for this board, but only a non-working board with no PAL chips. The ones in the photo are dummies for illustration only.

I'm currently looking for a working example. This was a best-seller but I have not seen any on eBay. So restoring this board will probably be a PAL designing exercise.

No firmware available, but I would like to get it running BBC BASIC.

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