From: Charles Sandmann <sandmann AT new-orleans DOT NeoSoft DOT com>
Subject: Re: GCC crashes in XMS mode
To: eliz AT is DOT elta DOT co DOT il (Eli Zaretskii)
Date: Mon, 30 Jan 1995 21:20:59 -0600 (CST)
Cc: dj AT ctron DOT com, djgpp AT sun DOT soe DOT clarkson DOT edu, davis AT amy DOT tch DOT harvard DOT edu

The source to access.c is in dj112m3.zip - note that the flags are
not being set to zero in the register structure before the call.
I think this is the problem.  Both DPMI and VCPI are obviously 
protecting you by clearing some bit that should not be set.  Sorry,
I am too busy to test this theory, but it looks like that is the
cause.