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From: peprbv AT cfa0 DOT harvard DOT edu (Bob Babcock)
Subject: Re: DPMI question
Sender: news AT cfanews DOT harvard DOT edu
Reply-To: rbabcock AT cfa DOT harvard DOT edu
Organization: Smithsonian Astrophysical Observatory, Cambridge, MA, USA
References: <DEt18B DOT HsB AT jade DOT mv DOT net> <4355ve$hj2 AT news DOT mountain DOT net> <43kpn0$1ji AT magus DOT cs DOT utah DOT edu>
Date: Tue, 19 Sep 1995 05:10:16 GMT
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To: djgpp AT sun DOT soe DOT clarkson DOT edu
Dj-Gateway: from newsgroup comp.os.msdos.djgpp

Steve Larsen (larsen AT lal DOT cs DOT utah DOT edu) wrote:
: : This deserves some elaboration.  Loading an invalid value into a segment
: : selector shouldn't cause a GP fault.  Attempting to access a segment
: : through a selector which contains an invalid value does cause a fault.

: Yeah, that is what I thought.  However, according to the information 
: presented at the GPF, it is dying on the instruction that loads the
: segment register.  Very strange, I thought.

My 80386 tech ref lists various possible causes for a GPF.  Some of
the possibilities include loading selectors (that are invalid in
specific ways) into segment registers.