KevinO
Experienced Member
Working on a PET 8032. It was a completely black screen until I used the Tynemouth RAM/ROM Replacement board. With the RAM and ROM switched to the test board, I get what looks like a normal boot screen, but without a cursor. I also don't get a chirp.
Poking around the CPU, I see that IRQ and NMI are high. I'm no expert, but I think there should be pulses here.
Also, I get pulses on all the address lines Except A7 is stuck high, and A8-A12 are stuck low.
At this point I could use a poke in the right direction, if anyone can help. Thanks!
Poking around the CPU, I see that IRQ and NMI are high. I'm no expert, but I think there should be pulses here.
Also, I get pulses on all the address lines Except A7 is stuck high, and A8-A12 are stuck low.
At this point I could use a poke in the right direction, if anyone can help. Thanks!