Failed at the first hurdle.You'd need to measure the crystal frequency somewhere other than at the crystal - otherwise what you are testing with will change the frequency (It's a high-impedance circuit, so even a good scope probe can throw it off!). The Phi2 & Phi4 outputs of the CPU would be good places to look.
Pin 3 of the CPU (Phi4?) is stuck at 0V
Pin 39 (Phi2?) is stuck at 5V
No activity on either
Edit: Scrub that. I'm a muppet!
Statistics: Posted by Boydie — Tue Dec 10, 2024 11:22 am