OK - to make sure I'm on the right lines, I attach Pin 20 of UD6 (yellow) and Pin 33 of the 6502 socket (green).
Do they look right before I go down the road of testing everything? I can't seem to get them in a better picture by altering any of the scope options - happy to be told I'm doing it wrong.
Scope probes are both set to 10x.
https://drive.google.com/file/d/1D2Q...ew?usp=sharing
Colin.