QuoteI have no idea how Mssiah detects SID chips, so I'd like to check a simpler piece of software first. Tobias, can you recommend a simple stereo player?
Link to the test program is in #2
And yes, it very much sounds like a broken trace to me as well... the board itself uses the DC voltage offset of the output (iirc) to detect the chip, so it would still work when data or address lines are interrupted.