Hi folks,
I’m working on a vt220 debug/repair and have gotten to the point where I need
to trace firmware execution at boot. I’ve managed to dump the proms (close to
but slightly different from the versions in Lars’ GitHub) and the 8051 internal
rom, and can load and disassemble these with the s51 simulator. I also have an
HP 1660 logic analyzer successfully configured and clipped up to capture
instruction traces.
I’m about to dive in to commenting the disassembly listings, but figured I’d
ping here to see if anybody might have done this already in case I wouldn’t
have to start from scratch?
thanks much,
—FritzM.
