Re: Gemini 80-Bus System
Hi Neal, wow!, thank you for your assistance.
The anomaly around the CRTC is down to my notes being a tad messy. The /OE /WE stated for the CRTC were in fact the signals for the Workspace RAM. The IORQ is signalling the CRTC as expected.
I will check the MUX lines as you suggest and then move on to check the DOT clock and IC25.
I have the RP/M monitor installed in the main CPU so should be able to install and run some code to do some I/O on port 0xb3.
I will let you know how I get on...
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