PET to S100 bus interface

From: Glenn Roberts <groberts_at_mitre.org>
Date: Tue Apr 29 19:52:35 1997

fyi, on p. 272 of November '79 Byte: a company called AB Computers offered
a device called "BETSI", described as a "PET to S-100 Interface &
Motherboard". cost was $119. While i'm on that page, the PET was $795 for
the entry level system (8K, small keybd, cassette) and on the high end:
$1,295 for 32K system with "business" keyboard. A 2040 dual diskette drive
(343,000 bytes total) would set you back another $1,295.

At 05:23 AM 4/29/97 -0400, you wrote:
>
>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 - 19:52:35 BST