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From: mdonahue@osiris.cso.uiuc.edu
Newsgroups: comp.sys.ibm.pc
Subject: Re: PROBLEM WITH AT's DMA CHIP!!!
Message-ID: <7700092@osiris.cso.uiuc.edu>
Date: 10 Jan 90 01:38:35 GMT
References: <65648@<1990Jan9>
Lines: 30
Nf-ID: #R:<1990Jan9:65648:osiris.cso.uiuc.edu:7700092:000:1149
Nf-From: osiris.cso.uiuc.edu!mdonahue    Jan  9 15:37:00 1990


/* Written 12:56 am  Jan  9, 1990 by gcw20877@uxa.cso.uiuc.edu in osiris.cso.uiuc.edu:comp.sys.ibm.pc */
/* ---------- "PROBLEM WITH AT's DMA CHIP!!!" ---------- */
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

/* End of text from osiris.cso.uiuc.edu:comp.sys.ibm.pc */