@root42 Power and clock looked good. Some IC output levels are more like 4V and look a bit noisy, but that's probably expected from MOS and TTL logic of this era.

Now RST and INT look good, and I see bus activity and CS being toggled on the ROMs. without an in-circuit emulator or a logic analyzer, I can't tell where the CPU is stuck.

My next move would be replacing the ROMs and maybe try a 6502 from a VIC20 to see if anything changes.

@codewiz so far I only ever saw ROMs fail on this side of a 1541. But who knows... I would also check all the chip select lines for the ROMs and VIAs. Those have to be working correctly to avoid bus conflicts. How does the data on address and data bus look?

@codewiz can you do a single trigger?