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From: Charles Sandmann <sandmann AT clio DOT rice DOT edu>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: IOPL question
Date: Fri, 11 Mar 2005 22:06:40 CST
Organization: Rice University, Houston, TX
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> I need to develop an MSDOS program that requires IOPL 0 to run.  Is there
> a way I can make an app to run in IOPL 0?

Under Windows, no.  Under DOS you can use either CWSDPR0.EXE or PMODETSR.EXE
to provide CPL 0 (and IOPL 0) support.