Message-Id:	<199804160903.LAA26302@relay1.force9.net>
From:	"Mike Vince" <mike AT monode DOT force9 DOT net>
Organization:	Monode
To:	OpenDOS AT delorie DOT com
Date:	Thu, 16 Apr 1998 10:07:01 +0
MIME-Version:	1.0
Subject:	Copy to com ports
Reply-to:	mike AT monode DOT force9 DOT co DOT uk

This is a general rather than DRDos problem.

I have several PCs made with various modern (<1year old) 
motherboards.  I am finding that Bios accesses to the com ports 
always causes crashes on these machines.  I have tested this under 
Windoze 3.11 and 95 MSdos 6.2 and 7 and OpenDos/DRDos.  Copy xxx 
com2: is the easiest way to cause this but I have written a C program 
to prove it is using the bios calls that causes the crash.  These PCs 
all use Cyrix/IBM 686 non MMX CPUs.

I have contacted the motherboard manufacturers (far Eastern) without 
success.

I have no problem on older PCs using various non Intel CPUs (NEC V20, 
Cyrix 386 to 486 upgrade, AMD 586, NexGen 586). It could be the 
Bios or the CPU. Has any one else experienced this? Does any one have 
an explanation? 

Thanks


Mike Vince

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