woolsey@nsc.UUCP (04/02/87)
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.