There was some discussion about this last year on the list. Check out
digest #14 if you have digests, or if you have the list traffic squirrelled
away in a mailbox somewhere then look at postings between August 2-4 1991,
or send email to ultralite-archive@csd.mot.com with this in the message body:
send digests/ulite-14
One way or another, you'll find that the ROM/RAMcard slot pinout was
painstakingly copied from NEC documentation by me, and a few interesting
and intriguing mysteries remain unsolved at this writing.
--
-Brian Smithson
Motorola Inc., Computer Group, Commercial Systems Division
10700 N. De Anza Boulevard, Cupertino, CA 95014 USA, (408)366-4104
brian@csd.mot.com, {apple | pyramid}!motcsd!brian