PET to S100 bus interface

From: Doug Spence <ds_spenc_at_alcor.concordia.ca>
Date: Tue Apr 29 04:23:19 1997

I'd just like to make an update for all who may be interested in that
potential PET to S100 bus device that I had sitting in storage.

I pulled it out tonight instead of studying for exams, and it is indeed
what was suspected.

The "motherboard" (if that is the correct term) is a Vector Graphic Inc.
S100 bus board. The RAM board that was being used for the PET, is a
Vector Graphic Inc. 16K Static RAM board with a date of 1977 on it. The
power supply says "KIMSI-PLUS Power Supply" on the back, 1977 from
Forethought Products.

This is all very wild, because I had no idea there was S100 stuff in this
house.

Anyway, the really interesting piece of circuitry is the PET to S100
interface board. It's the same size as the RAM board, and of course plugs
into the S100 bus. At the top of the board is a 50-pin connector that
plugs into a cable, that in turn plugs into the side memory expansion
connector on the PET 2001.

In white lettering, it says
.----------.
|_| | | |_||
| | |_| | || (<-- my cheezy attempt at duplicating the company
.----------' logo with ASCII, it's HUH surrounded by a question
.ELECTRONICS mark.)

  S100 MPA

and etched into the board it says "COPYRIGHT 1978 BY HUH" and "S100 MPA
REV A".

The board isn't very heavily populated, compared to the RAM board, and
most of the chips are 74LSxx chips.

Anyone out there know more than I do about this thing?


Doug Spence
ds_spenc_at_alcor.concordia.ca
Received on Tue Apr 29 1997 - 04:23:19 BST