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Path: utzoo!utgpu!water!watmath!clyde!ima!spdcc!dyer
From: dyer@spdcc.UUCP
Newsgroups: comp.sys.ibm.pc
Subject: floppy access causes parity error
Message-ID: <95@spdcc.COM>
Date: Tue, 2-Jun-87 11:35:26 EDT
Article-I.D.: spdcc.95
Posted: Tue Jun  2 11:35:26 1987
Date-Received: Thu, 4-Jun-87 03:29:32 EDT
Organization: S.P. Dyer Computer Consulting, Cambridge MA
Lines: 16

I think I have refined the statement of the problem I made a few days ago.
Any attempt to read from drive A: on the AT causes a parity error.  This
would include booting DOS from a diskette or accessing the floppy under
SCO XENIX.  Naturally, DOS hangs after vectoring to such an unexpected
interrupt, while XENIX performs a panic.

Anyone have an idea what could be going on hardware-wise?  The hard disk
works fine, although it still times out with a 1790 error at boot time.
Would this be a bad DMA channel?  The error occurs with two different
hard/floppy controllers which pass diagnostics otherwise.


-- 
Steve Dyer
dyer@harvard.harvard.edu
dyer@spdcc.COM aka {ihnp4,harvard,linus,ima,bbn,halleys}!spdcc!dyer