Help - S-100 board info needed

From: Barry A. Watzman <Watzman_at_ibm.net>
Date: Tue Feb 16 17:57:04 1999

I need information on two S-100 cards that I have acquired with no manuals. If someone has manuals on these, I'd pay a nominal fee for a copy, but in the meantime I'd like switch and jumper info.

Card #1 is a Vector Graphic 64k RAM card. The card uses four rows of National Semiconductor MM5290 chips. There is one dip switch, 8 position, and lots of jumpers. Also, some circuitry that is not populated [U17, U18, U32 and a number of discreet components]. What are the 5290's, are these static or dynamic ? I was presuming it was DRAM, but I was expecting 4 rows of 4116's. Bad news, the memory chips and most of the support chips are soldered and are not socketed, which will be tough to fix if it doesn't work [and for a 20+ year old board, the chances that it works are not that good]. Can anyone help ?

Card #2 is a Problem Solver Systems {PSS} Ram 16, a 16k static board with TMS4045 chips [those are 4k x 1 static rams, good chips, I have LOTS of experience with them and even some spare chips]. Two dip switches, one toggle switch and lots of jumpers. Need info.

Anyone who can help, thanks in advance !

Regards,
Barry Watzman
Watzman_at_ibm.net
Received on Tue Feb 16 1999 - 17:57:04 GMT

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