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From: gcw20877@uxa.cso.uiuc.edu (George Wang)
Newsgroups: comp.sys.ibm.pc
Subject: PROBLEM WITH AT's DMA CHIP!!!
Message-ID: <1990Jan9.065648.9754@ux1.cso.uiuc.edu>
Date: 9 Jan 90 06:56:48 GMT
Sender: news@ux1.cso.uiuc.edu (News)
Reply-To: gcw20877@uxa.cso.uiuc.edu (George Wang)
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Organization: University of Illinois at Urbana-Champaign
Lines: 25

Several months ago we purchased an IBM AT compatible computer
from the CVN Television Network.. It's a MOTOROLA Brand AT Computer...

There seems to be a problem with the system's DMA Chip.. Any backup
program that uses direct DMA access for high speed backups (such
as Fastback and PCtools PCBackup) creates unreliable backups...

I can only get the LOW DMA speed to pass for Fastback Plus and even
then the backups have sector errors when read back using the
compare files feature...

I heard that AMD brand of DMA chip had a problem with it... Does
anyone know HOW TO SPOT and REPLACE a bad DMA chip?? I looked at
the motherboard but have no clue as to what the DMA Chip looks like..
Also what would be a good replacement DMA Chip??

I would really like to get Fastback Plus working.. Please email
as I don't keep up with this newsgroup... Thanks!

George

--
George Wang
University of Illinois
gcw20877@uxa.cso.uiuc.edu