I've just sat down and read this mammoth thread all the way through as it looked interesting. Great last post to get to!stephen_usher wrote: ↑Fri Nov 20, 2020 5:58 pmOK, it's fixed the low performing 68000, so it was obviously the Power/GND noise which was causing the CPU to miss clock cycles.
IMG_2106.jpg
Well done, Stephen.
I'm not sure I've understood how you're switching the CPUs, though. It doesn't look enough chips to be completely isolating all pins. Are you holding BGK or similar?
Cheers,
BW.