I can tell you what it is and I've seen the interface cards but I've never
used it and never seen the sever end of one.
I thought the 50960 was the server, but I am probably mis-remembering
things...
From what I remember, the server was in the same box as
the 9817, but
with a totally different mainboard (68000 based, not 68010 based I
think). The mainboard has RS232 and HPIB ports. There are 3 DIO slots
with esternal connector access, one contains the SRM card, one contains a
text-only video card, the last a 'human interface card' (HP-HIL for the
keyboard, a TI sound chip with a 3.5mm phone socket for the speaker, and
another HPIB port).
-tony