Midway 8080 RAM test board

Well, I can't find anything in the archives, so I'm looking for the
documents for the RAM test card that plugs into the old 8080 (Space
Invaders, etc.).
This has three LED 7-segment displays, that produce a code to
indicate which RAM is bad (assumption). So I have a bad board and
hope to use this to speed up the RAM test...without warming up the
Fluke toys.

The card has MIDWAY MFG CO and "80-903" as a part number, also has a
single PROM (24 pin) and two 24 pin sockets - one for the PROM, the
other for a 24 pin ribbon cable to plug into "H" (assumption again).

I have a picture I can send if anyone thinks they might have something on it..

John :-#)#

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