Chuck, thanks. I will have a look at the crystal driver. Will need to remove that board.
Regarding the processor, I get what you are saying. I put the jumper in reset mode which holds the RESET line down to ground. Processor should be halted. When I pull the jumper, it brings the RESET line back up and I am expecting the processor to start and do something, but all I get on the LA trace is RESET going up and no other activity. Even though I don't have the address lines connected to the LA, I expected to see the status of S0 and S1 change in response to a read operation and at least some ALE pulses before the processor halted again, but my understanding here is admittedly limited. I am learning as I go along.
