System Industries QBus board

From: David Barnes <davebarnes_at_adelphia.net>
Date: Sat Apr 6 14:51:25 2002

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_at_adelphia.net
OpenVMS , Tru64, Netbsd, Linux guru
and collector of DEC equipment
Received on Sat Apr 06 2002 - 14:51:25 BST

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