I have managed to latch on to one of the above cards... the sticker on
one chip says its a Model CDU-720/TM (sn 2127 BOYA8) and two ROMS have
F720Y1A8 and 2A8 respectively. Board copyright is 1989 (in copper) and
the silkscreening says 1991 - most of the chips are from '91. It is
single-ended only; the differential section is not populated.
I have yet to do any Googling, but if anyone has anything on this... I
know a nice friendly 11/44 system (sitting to my immediate left) that
would dearly love to be able to read CDROMS, SCSI disks, etc....
Cheers
John