DEC: System Industries 9901-6082-A

From: Ethan Dicks <>
Date: Wed Dec 29 23:04:27 2004

On Wed, 29 Dec 2004 19:47:36 +0100, Jochen Kunz
<> wrote:
> Hi.
> I have a quad Qbus board in front of me. It is labeld "System Industries
> 9901-6082-A". It has two 40 pin IDC connectors, lots of TTL, four
> AMD2905, three EPROMs, the usual PALs, ...

Got a couple myself, but no docs...
> This is some sort of disk controler according to google. What I didn't
> find out: Is this the complete controler or is this only a part of a
> controler? There is a "System Industries 9900". It is a separate 19"
> rack box containing a SMD (?) controler. It is interfaced to SBI or
> UniBus or ??? with a bus interface card and ribbon cables. Maybe the
> card I have is the QBus interface card?

AFAIK, yes... you have the Qbus interface card to an SI9900 box.

What you are missing is a 5.25" tall, 19" wide box with two types of
cards inside, one set talks to system cards like you have (I also have
one 11/750 MASSBUS card) over a pair of 40-pin ribbon cables, and the
other set talks to SMD disk drives over regular SMD cables.

At home, I have some SI docs, but not for the Qbus card. I got my
card from a former SI engineer who had a crate of stuff in his garage
from the old days. All of the docs I will have are from the days when
we had an SI9900 at work with a 160MB Fuji and a Fuji Eagle hooked up
to our (2MB) 11/750, so circa 1984.

As I now _have_ a Qbus card, I'd love to get docs for it, at the very
least, DIP switch settings.

Received on Wed Dec 29 2004 - 23:04:27 GMT

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