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32-bit acorn hardware • Re: A3000 serial issues with Intersil CDP65C51 (with fix)

Just in case it helps someone else in the same predicament Image may be NSFW.
Clik here to view.
:)
It works! I had exactly the same issue with CDP chips in an A3000 and this module appears to solve that.
I do occasionally see all of CTS/DCD/DSR flicker off and on together though, which doesn't happen with the original CMD chips.

This module does NOT fix the 'same' issue I see with WDC chips though, and indeed loading this module prevents all serial operation with a WDC chip.

So great work - but equally - what a mess for a bit of RS232 !

Statistics: Posted by IanJeffray — Sat Apr 05, 2025 4:57 pm



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