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From: cs161fdf@sdcc10.ucsd.edu (cs161fdf)
Newsgroups: comp.sys.ibm.pc.hardware
Subject: Memory problems on 386....Please help
Message-ID: <15123@sdcc6.ucsd.edu>
Date: 29 Dec 90 00:02:27 GMT
Sender: news@sdcc6.ucsd.edu
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Nntp-Posting-Host: sdcc10.ucsd.edu


Hi everyone,

   I have a 33 MHz 386 pc by Positive.  I think the mother board is
made by Eltech Research Inc.  The system came with 1 meg
of 256k SIMMs, and after upgrading to 4 megs I think that I am having 
memory problems.  System hangs or gives Unrecoverable App. 
Error in windows 3.0 when I tried to do anything and occationally hangs
in DOS also.  CHECKIT gave me the following result:

MEMORY TEST PASS #1 RESULTS: (QUICK TEST ONLY)
    Program Buffers.............................................Passed
    Base Memory.................................................Passed
    Extended Memory.............................................FAILED ***
        ERROR at Address   221B48h, Bits ..D......654..10 Parity
        ERROR at Address   221B4Ah, Bits .....A.........0 Parity
        ERROR at Address   231B48h, Bits ..DC.A9.7.54.... Parity
        ERROR at Address   231B4Ah, Bits FED..A9.....32.. Parity
        ERROR at Address   241B48h, Bits ...C.A.8.654.2.0 Parity
        ERROR at Address   241B4Ah, Bits .E.CB.9..6.43... Parity
        ERROR at Address   261B48h, Bits FEDCBA9876543210
                     .           .           .
                     .           .           .
The error is always at address xx1B48h, but the memory test gets
through with no errors if i load HIMEM.SYS that comes with windows 3.
So I don't know what to make of this.

When I put in 4 megs, I had to change 2 PAL chips (from
Positive) on the mother board. Can anyone tell me what these are? 
I put the old memory and PAL chips back in and ran the test and
got no errors. I don't think the problem is with 1 meg SIMMs either, 
since I tested them on another machine. Can something be wrong with
new PAL chips that I put in?
Please email me any thoughts or ideas on this.
Thanks.

ye
(cs161fdf@sdcc10.ucsd.edu)