I haven't tested any of the ROMS other than 00. I'm stuck at the 00 Bus ROM ROM. neither of my boards will run the 01 LED ROM.
With 00 ROM I have all the correct signals at IC1 (CPU) except for pin 9 A0, which is low, and should be high. I can't find a short of any kind and there is continuity from pin 9 to the buffer chip and from the buffer chip to the IC17 ROM.
I am testing on a workbench and if I detach the driver board all the datalines are low, I don't know if this is normal or if it is a clue.
Tonight, I will test with Leon's test chip, I have already tested with Marco's and I get 1 long flash then a locked LED, if I am interpreting correctly it means that the first ROM is not testing correctly, but replacing the ROM makes no difference.