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- Newsgroups: comp.unix.bsd
- Path: sparky!uunet!decwrl!csus.edu!netcom.com!alm
- From: alm@netcom.com (Andrew Moore)
- Subject: Re: More on NMI problems.
- Message-ID: <w9mnsvl.alm@netcom.com>
- Date: Sat, 05 Sep 92 01:20:30 GMT
- Organization: Netcom - Online Communication Services (408 241-9760 guest)
- Lines: 25
-
- In article <1992Sep2.123248.17492@ponds.uucp> you write:
- >Well, I got much advice on my NMI problems; indicating that I probably
- >did, in fact, have a bad memory chip on my machine.
- >
- >So; I grabbed testext.exe from SIMTEL20 and let it have at the machine,
- >to determine which chip was bad, etc....
- >
- >It ran for 38+ hours, without a single error (this program uses
- >protected mode read/writes of words and double words, randomly scattered
- >through available memory.) Other people had sent me mail indicating
- >this program found their problem, etc...
-
- If it is a bad chip, it may well not show up after 38 hours
- testing. I ran (DOS-based) QAPlus _long_ memory test for several
- hours before an error showed up. The short memory test never
- showed an error. I.e., it depends on the pattern used to test
- memory. You might never see an error under DOS, for instance, so
- beware! On the other hand, the problem I had was not a bad RAM
- after all, just a bad connection. I solved the problem by removing
- the chips and spraying both RAM chips and RAM sockets with an
- electronics cleaner/degreaser (but no lubricant!). This will be
- necessary whenever adding RAM to an old motherboard because of
- oxidation. Good luck.
- -Andrew Moore <alm@netcom.com>
-
-