Aurel,

I read your other thread. The code beginning "02" is supposed to indicate a RAM error, as you are aware.

It seems that your problem is not centred in the ROM, though it may relate to other functional chips that are necessary to the reading of the ROM as well as the RAM. I plan to check that out thoroughly when I get enough information.

What is the book that you mention, about repairing 128k Macs?

Rick