Path: utzoo!news-server.csri.toronto.edu!cs.utexas.edu!swrinde!zaphod.mps.ohio-state.edu!sol.ctr.columbia.edu!ira.uka.de!news
From: S_EDELMANN@iravcl.ira.uka.de (|S| Hans Chr. Ede)
Newsgroups: comp.sys.atari.st
Subject: Re: Help! Hot memory?
Message-ID: <91.074.13:06:43@ira.uka.de>
Date: 15 Mar 91 12:00:42 GMT
References: <5116@mindlink.UUCP>
Sender: news@ira.uka.de (USENET News System)
Organization: University of Karlsruhe, FRG (Informatik Rechnerabteilung)
Lines: 53
In-Reply-To: Bill_Moore@mindlink.UUCP's message of 12 Mar 91 11:02:13 GMT
X-News-Reader: VMS NEWS 1.05

In <5116@mindlink.UUCP> Bill_Moore@mindlink.UUCP writes:

> I have an older ST (purchased in 1986) with an easieST memory expansion board
> installed with 2mb of memory.  Recently it has begun to lock up with narrow
> vertical lines on the screen and eleven bombs. This happens when the machine

I think it's just a contact problem. I wrote a program to find such errors
and i've included it in this message.
Just start the program, choose your configuration and wait until an error
occurs. Then you can see which ram chip is the problem (each bit
corresponds to a ram chip).
Remove that chip and start the program again. If the same bit is defective,
you have the right one.
Then you can try exchangching it with another chip on the board. If the
error is in the same bit, then it's a contact problem, and you should 
solder each contact of that socket again.
If the error is now in the other bit, then the ram chip is defective and
you should exchange it with a new one.

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
I   Hans Christian Edelmann  (at University of Karlsruhe, Germany)  I
I   E-Mail :  s_edelmann@iravcl.ira.uka.de or uk9d@dkauni2.bitnet   I
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

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