6 Apr
2002
6 Apr
'02
2:51 p.m.
This is an SI (System Industries) interface card to the SI 9900 controller,
and its variants... The 9900 allowed you to attach SMD disk drives, and
it did RM (later MSCP) emulation with VMS... It was also supported in
PDP's. I used to have some of these.... interesting technology..
Doc Shipley wrote:
Unidentified Quad-Height Board:
System Industries
9901-6082-a
Date Code 621
stencilled on the back -- 61907 113
It has 2 40-pin connectors, 2 8-switch DIP banks and 1 4-switch bank,
and 4 AMD 18-pin chips - AM2905PC / 8335DKP
Lots and lots of 20-pin doohickeys - AM2908PC / 8512DMP
And some Motorola 20-pin thingies - SN4LS244N / I8709BD
Socketed 28-pin EPROMs, I think, with label attached:
9900-8954
9900-8955
9900-8956
Socketted smaller 20-pin ICs with labels:
9900-8953
9900-8957
9900-8958
9900-8959
9900-8960
9900-8961
9900-8962
9900-8963
9900-8964
9900-8965
9900-8967
9900-8968
9900-8969
9900-8970
9900-8971A
9900-8972A
9900-8970
There are other components, but maybe that's enough.
I can't find any reference at all online. Does anyone have a clue?
Doc
--
David Barnes
davebarnes(a)adelphia.net
OpenVMS , Tru64, Netbsd, Linux guru
and collector of DEC equipment