Ok here is what I'm trying to find out.
I have a Rev-0 with no auto-start ROM and both disk II and CFFA3000. I have a language card in it and I put a RamEx 16k "language card" which only provides 16k so that I still have to do 6 Ctrl P in monitor to boot from floppy on power up.
I ran all the test in APtest and all the apple dealer diagnostics disk tests that apply and it passes.
I also ran a modified version of one of Mike Willegal's memory tests, which did find a bad ram chip that I replaced with a good one.
So most programs run... However there are a couple I can't get working. I tried them on CFFA and on floppy (I tested with a known good drive also). For example I can't get Carmen Santiago working it seems to hang. It is a cracked copy so maybe the copy protection circumvention doesn't like something about the rev 0.
Has anyone found anything else that doesn't work on a rev 0. Mike Willegal said he has only found that stuff needing more memory won't work and he doesn't have a language card in his system so if it requires 64k it won't run, but 48k will. I have the extra memory card, the RamEx I borrowed from my Rev 4. I do also have the original Signetics 6502, which is dated 7807, so maybe there is a bug in the processor that is either screwing some stuff up from timing or an instruction perspective.
Just trying to figure out if there is something wrong with my system or is it normal. I was going to replace my everyday II plus with my Rev 4, but if my Rev 0 can pretty much do everything it looks much cooler in my office.
One note of interest to Rev 0 guys: My 1976 Sony trinitron doesn't have the messed up video on top that a lot of monitors have when hooked up to a rev 0.