UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Gemini 80-Bus System

john_newcombe · 23rd May 2019, 10:21 am

Yes, the clock is good and does come from the master clock. What I am missing is the output from the Z80s IORQ which is used to strobe the CS of the CRTC. I am starting to think this is a software issue, i.e. I have a dodgy ROM.

23rd May 2019, 10:21 am	#75
john_newcombe Hexode Join Date: Apr 2019 Location: Skipton, North Yorkshire, UK. Posts: 252	Re: Gemini 80-Bus System Yes, the clock is good and does come from the master clock. What I am missing is the output from the Z80s IORQ which is used to strobe the CS of the CRTC. I am starting to think this is a software issue, i.e. I have a dodgy ROM.