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Path: utzoo!utcs!tj
From: tj@utcs.uucp (tj)
Newsgroups: net.micro.pc
Subject: Re: Another IBMPC Memory Error -- HELP!
Message-ID: <1130@utcs.uucp>
Date: Fri, 28-Feb-86 09:31:16 EST
Article-I.D.: utcs.1130
Posted: Fri Feb 28 09:31:16 1986
Date-Received: Fri, 28-Feb-86 10:14:51 EST
References: <122@Shasta.ARPA>
Reply-To: tj@utcs.UUCP (tj)
Distribution: na
Organization: University of Toronto Computing Services, general purpose UNIX
Lines: 15
Summary: 


I had a memory problem on a machine a friend of mine had. I went the
standard chip swap way and was stumped. all the chips tested fine
but still when all were in the machine would not recognize that all
the memory was in. It turned out that a few of the cheap chips I had
purchased were heavily loading the the address lines. They would work
alone in the machine but when more chips were added the address signals
were so low the other chips failed. The only way I found them was
by putting in two rows of chips that worked perfectly and then
changing one particular chip with an unknown quality chip and seeing if
memory test still worked and reported correct amount of memory.
This was back when I was using 64K chips and they were dear, today I
might just look at the cost of 64k's and nuke them all!

tj