8-bit acorn hardware • Re: Replacement Serial ULA module for the BBC Micro

If you have any images of the Acorn BBC Serial ULA and/or Serial Processor I'd be very interested to see them. It would be great to figure out the original logic design.

Sadly not, but I do have the Master 128 IC21 (TAHC06 CF30049 / VGC7205A0717 - I have the latter) which is the Peripheral Bus Controller.

If someone can provide some of the other chips I can image them - but I don't have any to hand.

I asked for this years ago! (And the 8271!)

The 8271 has been done:
https://scarybeastsecurity.blogspot.com ... 1970s.html
viewtopic.php?f=3&t=19762&start=300
https://github.com/ZXGuesser/Intel-8271-reversing
https://scarybeastsecurity.blogspot.com ... -chip.html
https://x.com/kenshirriff/status/1300900070414413824

Turns out it's a dual-processor serial data controller Intel intended as a base for several products... it ended up just being an expensive floppy disk controller.

Statistics: Posted by philpem — Thu May 08, 2025 12:02 am

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