I think those A20 and A21 jumpers have something to do with whether the
Mac's ROM is recognized or not. I vaguely recall that there was some talk
about a ROM SIMM that was planned to supplement or replace the original LC
ROM.
Bob
----- Original Message ----- From: "J.S. Garrison"
Martin wrote:
> > Next to the good-looking battery there are six pins labeled
> > A20 or A21... what are those for? (resetting battery?)
>
> IF there's no fan or speaker in there, it may be for those.
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