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From: woolsey@nsc.UUCP
Newsgroups: comp.periphs
Subject: Looking for manual
Message-ID: <4170@nsc.nsc.com>
Date: Thu, 2-Apr-87 14:09:19 EST
Article-I.D.: nsc.4170
Posted: Thu Apr  2 14:09:19 1987
Date-Received: Sat, 4-Apr-87 16:27:07 EST
Distribution: na
Organization: National Semiconductor, Sunnyvale
Lines: 25
Keywords: ST506 Multibus 8748 controller 9056

OK, folks, it's time to tap the resources of the net to locate some
obscure manual for some equally obscure board I have.

The board:  Multibus-I ST506 disk controller.  Board has no
manufacturer's marking.  Board has a large black puck labelled
9056-Rev05.  Board also has an 8748 labelled 103973C with a sticker.
The board itself has P/N 103976 on the front and 103977 on the back.

I have an S-100 board using the same puck for which I also have a
manual.  The manual is
MSC-9391 DISK CONTROLLER
 PRODUCT SPECIFICATION
     MSC104021
       REV 00
Inside it states "The Disk Controller is based upon the MSC-9056
module..." The company name on the manual is  "microcomputer systems
corporation" and gives a Sunnyvale address on Lakeside Drive.  They no
longer exist at that address.

Thus I know how to talk to the puck.  I've disassembled the code in the
8748 and found routines that issue each of the known puck functions.
What I don't have is something that describes the interface between the
8748 and the Multibus.  Someone out there in this big, wide world must
have such a manual.  This posting is an attempt to find it.  Sound
familiar to anyone?  Please let me know if it does.