Mailist to discuss all issues regarding the Digitech GSP-2101 Guitar FX Processor

After replacing the EPROMS and the RAM, the unit is up and running. 
It looks like the SDISC chips are fried also, there are no effects 
and I can only use bypass. I did some signal tracing and verified 
that the SDISC chips are both gone. My 2101 was loaned to a friend, I 
think he fried it, some kind of power surge (so he says). Ironically 
the Zilog chip is fine. Anyone know what the difference is between 
SDISC I and II chips are? I have the SDISC II ones.

Incidentally, I am using a Dallas 1245Y ram module, and I did a mod 
to the battery backup circuit (battery is no longer needed because 
the 1245y has it built in)