67 is flakey

[teenix]

(10-13-2023 01:49 AM)mbielman Wrote:  Have I given up? Yes and no. Replacing the logic board with the updated one. But I really want to know which ROM has failed on the bad board. That's on hold.

Cheers!

If you have a storage oscilloscope, you can trace the code execution and find out where it fails. It is a bit time consuming, but it works, I have done it plenty of times.

You can use a 67 emulator (like mine) to get a snapshot of the start-up code and then compare it to what you see on the scope.

It would be nice to have the ability to store the scope data to a file and be able to interrogate that file and read the program codes and data line based on the logic flow, a big time saver. I don't think I have it available, hmmmm..., silly mind is ticking over again.

cheers

Tony