Path: utzoo!attcan!utgpu!news-server.csri.toronto.edu!rutgers!carssdf!usenet
From: usenet@carssdf.UUCP (John Watson)
Newsgroups: comp.unix.xenix
Subject: xenix 2.3.2 trap D on 486
Keywords: 486 DMA TRAP
Message-ID: <254@carssdf.UUCP>
Date: 11 Aug 90 16:54:32 GMT
Organization: C.A.R.S.,Middlesex,NJ
Lines: 9

Help, I am getting a TRAP 000D when ever two DMA devices like HD & FD
are used at the same time, like swap while reading fd, or copy FD to a
file on HD.  I have tried setting DMAEXCEL to both 1 & 0, it seems
to make no difference.  CACHE Enable/Disable also no effect.

The processor is a 486 (no brand/Tiwan) using an 82C206 for DMA and
82C481 & 82C482 for Cache control.

Any help appreciated, quick please.    John Watson ...!rutgers!carssdf!usenet