Re: Detecting Bad Memory Chips of the PC

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#4018

From: Sezgey Pachkovsky
Date: Tue, 27 Jul 1993 13:22

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Mike Palmer (mpalmer@encore.com) wrote:

: The power on test does not thouroughly test the memory at all.  You need
: to run something like checkit memory test for 24 hours to be reasonably
: certain that memory is OK.

Hope, hope. I had seen machines which will run CheckIt's tests Ok for _weeks_,
but will fail on a simple test of filling each doubleword with it's linear
address and reading it back just once... The problem is what CheckIt tests
memory in 64K-chunks, and if writing to some address will _sometimes_ change 
memory at some +/- 64K location (it could happen if you address decoding logic 
is at fault), most probably CheckIt will miss it...

Cheese,

/Serge.P

--

Russian guy from the Zurich university...

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From: ps@oci.unizh.ch (Sezgey Pachkovsky)
Subject: Re: Detecting Bad Memory Chips of the PC
Message-ID: <1993Jul27.132234.8704@rzu-news.unizh.ch>
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Date: Tue, 27 Jul 1993 13:22:34 GMT
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