>>Did you try the ctrl-break reset? >If so, I would first try to read the ROM externally to make sure it's not >corrupted, >then leave only 8K of known good RAM, and if IO/M is still stuck, >that means the >80C85 is faulty.
Thanks Frank. I had tried removing the two option RAMs and had the same result. I just tried ctrl-break reset which also did not change things. Is there a ROM dump somewhere online I can compare my ROM to? I'll get out my EEPROM burner and read it in later this afternoon, have something else on the bench now that will be doing a burn in for a few hours. I was just looking around for a source for an 80C85. None of my normal sources (BG Micro, etc.) seem to have them so perhaps eBay is the only option. I cringe at buying ICs on eBay as you never know what you actually get (correct part working or not) or if the seller will just throw it in a plastic bag. Thanks again, Jeff
