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From: leo@uhccux.uhcc.Hawaii.Edu (Leorey Marquez)
Newsgroups: comp.sys.ibm.pc.misc
Subject: 386-PC Drive Problem
Summary: Drives destroy floppy diskettes
Message-ID: <12511@uhccux.uhcc.Hawaii.Edu>
Date: 17 Apr 91 15:15:35 GMT
Distribution: comp.sys.ibm.pc,comp.sys.ibm.pc.hardware,comp.sys.ibm.pc.misc
Organization: University of Hawaii
Lines: 27


 
I would like to ask for help concerning a problem that has been bugging my 
computer. I have 386 clone from ACT which I bought mail order more than a 
year ago. Recently, both of the floppy drives (high density 3.5", high density
5.25") have been destroying any unprotected disks that is inserted in them. By 
destroying, I mean any disk access will not only erase the data but will also	
leave the media unusable. However, the computer reads properly from write-
protected disks. Also, read and write operations on the hard drive are 
done properly. I checked for viruses and found none. 

A friend of mine performed some diagnostics and found that the DMA page register
number 2  was bad. A local branch of TRW has offered to fix my machine 
provided I have the necessary chips to replace the bad ones. I found that the
major chips in the system board are from Chips and Technologies with numbers
P82B305, P82C302, P82A304, P82A306, P82C301, P82A303, and P82C206. I would like
to know which of these chips and any other chips will need to be replaced,
what chips would be compatible replacements, and how I can order these
replacements. Suggestions on how I should deal with this problem are also
welcome. Thanks to all in advance.

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LEOREY O. MARQUEZ
DEPARTMENT OF DECISION SCIENCES
UNIVERSITY OF HAWAII
HONOLULU, HAWAII 96822
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