Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!uunet!beartrk!ursaco!cjp
From: cjp@ursaco.beartrack.com (cjp login)
Newsgroups: comp.sys.3b1
Subject: Upgrading motherboard memory on 0.5meg 7300
Message-ID: <1991Feb19.033445.6107@ursaco.beartrack.com>
Date: 19 Feb 91 03:34:45 GMT
Organization: URSA Consultants, Chevy Chase, MD.
Lines: 21

Newsgroups: comp.sys.3b2
Subject: Upgrade of memory on 0.5 meg 7300

I have received the following notes on the upgrade of the memory on the
mother board of a 7300 with only 0.5 megs of memory.

First locate the jumpers at JR1.  You will find E2 connected to E3 on the
bottom of the board.  You will have to remove the motherboard and cut this
jumper.

Next carefully install a jumper from E1 to E2 on either side of the board.

Then install a 74F258 chip in the spare near the jumpers described above.

Remove all of the memory chips and replace with them 256K bit 150ns DRAMS.

This sounds pretty easy if you have any experience with working on printed
circuit boards.  Has anyone done it?  What problems should I look for?
I expect to use sockets for the 256k chips and the 74F258.

-- cj