Date: Tue, 2 Mar 1999 14:58:55 -0500
Message-Id: <199903021958.OAA24745@envy.delorie.com>
X-Authentication-Warning: envy.delorie.com: dj set sender to dj AT envy DOT delorie DOT com using -f
From: DJ Delorie <dj AT delorie DOT com>
To: djgpp AT delorie DOT com
In-reply-to: <7bhdtm$4g0$1@murdoch.acc.Virginia.EDU>
	(clc5q AT cobra DOT cs DOT Virginia DOT EDU)
Subject: Re: Privileged assembler instructions
References:  <7bhdtm$4g0$1 AT murdoch DOT acc DOT Virginia DOT EDU>
Reply-To: djgpp AT delorie DOT com


You should be able to do this with the ring-0 version of cwsdpmi
(cwsdpr0.exe) but you won't be able to run any memory managers (like
qemm, 386max).

> If I install DJGPP, will I be able to use the gcc inline assembler
> under DOS (I am running DR-DOS 7.03) to run programs with privileged
> instructions? I am doing architecture/compiler research, and it would
> be nice to have access to performance counter and cache flush
> instructions, etc., that cannot be used in Windows NT because they are
> privileged. I am hoping that the lessened secutiry of DOS will permit
> me to run my experiments via gcc under DOS.