Rainbow memory board question

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#728

From: CLARK
Date: Tue, 13 Nov 1990 22:21

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   A while ago I bought a model A Rainbow for parts. In it I found a board
which I think is a memory board but I have seen nothing like it before. 
It is a two tiered card marked MLI-0 06-84. The two cards are then individually
labeled ASSY 10790A and ASSY 10791. The 10791 card is 7" x 2" and contains
36 chips marked TMS4164-20ML P8310 directly soldered to the board. This card is
attached to the 10790A card which contains 27 chips labeled MN4164P 431-15
mounted in IC sockets and assorted other chips. The 10790A card is 10" x 2" and
has an edge connector for plugging into the memory slot on the Rainbow's mother
board. My problem is that there is a 4 wire jumper cable that comes off this
board and looks as though it should plug in on the mother board somewhere. The
jumper cable comes off a position marked J4 and terminates in a plug which looks
as though it fits on top of a chip. Does anyone know who made this board and
where this jumper cable should go?

Kerry Clark             STOSC::CLARK@scivax.stsci.edu

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From: CLARK@SCIVAX.STSCI.EDU
Newsgroups: comp.sys.dec.micro
Subject: Rainbow memory board question
Message-ID: <901113172134.20219025@SCIVAX.STSCI.EDU>
Date: 13 Nov 90 22:21:34 GMT
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