Since the arrival of the CPU board and motherboard prototypes, I’ve been busy all day at my primary customer’s site, filling orders for KIM boards, family, and Boy Scout activities.
There is a mostly populated CPU board that’s fetching data from the EPROM but not working properly and I just haven’t had enough time to sit down with the logic analyzer to find what’s going on. The first board needed three cuts and two jumpers to get this far and it appears address lines are properly buffered, correctly decoded, and getting to the EPROM, so the next step is to see what’s coming out when the reset vector is fetched.
A single motherboard has enough on it so the CPU can plug in, get power, and the reset button works.
I have commitments to Boy Scouts all weekend but will start to have free time again next week to get this project working.
The 64K RAM board prototypes should arrive any day now, so I’ll build one up and send to a beta user for testing.