Peter KreftingIf a #Commodore64 starts up with an Out Of Memory error, that's probably not a good sign.
root42@root42 Long board, this is an early model, they stopped selling Swedish C64s when Handic went out of business, IIRC.
@root42 I need to read up on chips to see which one is which.
I don't know the history of this unit, I think my father received it as broken from someone.
@nafmo they are not μT RAMs. That’s good. Could also be the PLA, Muktiplexers or something else. Needs more analysis, maybe test with DesTestMax and DeadTest /DiagROM.
@root42 Looks like one of the eight RAM chips is uT, according to my colleague, who does hardware, it looks like the other 7 have been swapped at some point.
@root42 There was also some stuff that had come loose, but soldering that back up didn't help.
We'll try switching the bad chip (at some later point in time) and see if that helps.
I'd really love to have a proper localized C64. They had stopped selling them by the time I bought mine.
@root42 I've ordered a set of 4164 chips now. Maybe I'll get lucky.
The board shows signs of having been tampered with before, perhaps a previous attempted repair that didn't work?
@root42 This seems to indicate a single bit failure, which, according to the schematics, matches the one chip that was not the same as the others...
@root42 Success! Now the test runs through without issues!
@root42 Yes, it's not that easy to see on the small screen I have available at the office.
The old Commodore diagnostic tool didn't like them, though, being the Swedish localisations..
14 iterations without reporting any errors!
The old PSU started smelling a bit funny, so I think it is best avoided. I bought one from https://www.c64psu.com/ that works like a charm, though.
Finally got around to open my 2017 birthday gift from Mermaid! #PondSoftware #TheBearEssentials #Commmodore64
