So My Compupro
RAM16 (64k static) in the NS* (system A) has all banks
enabled and if we hit e800H the FDC forces phantom/ and the ram16 is
deselected for that address.
Ah... I see... Now, the 4FDC does not have any connection to
pin 67, so it is not using phantom. But it should be easy to
implement... Can I just take the /CS (-NOT- chip select) pin
from the 2708 and wire it to 67? Maybe I need to -NOT- it first?
Exercising a little more brain power, I see I'll need to put a
diode in there to keep someone elses phantom from activating this
PROM.