From: "Alexei A. Frounze" <see_below AT the_messasge_body DOT com>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: far pointers
Date: Mon, 12 Jun 2000 20:23:47 +0400
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Eli Zaretskii wrote:
> 
> On 11 Jun 2000, Nate Eldredge wrote:
> 
> > "Alexei A. Frounze" <see_below AT the_messasge_body DOT com> writes:
> >
> > > Nate Eldredge wrote:
> >
> > > > AFAIK, this is not true.  If you boot DOS without himem.sys or other
> > > > memory manager, then run a DJGPP program using cwsdpmi, you can do
> > > > disk I/O and everything else without ever entering V86 mode.  You just
> > > > go backa and forth between protected and real modes.
> > >
> > > You're wrong.
> > > 1. HIMEM.SYS has nothing about V86. It just allows to access extended ram
> > > (above 1MB mark).
> >
> > I may have been mistaken.  However, I believe there is some standard
> > memory manager (perhaps EMM386) that causes DOS to run in V86 rather
> > than real mode.  But without it, DOS runs in real mode, and DJGPP
> > programs run in protected mode.
> 
> You are not mistaken, Nate.

OK. We simply should keep in mind that a PMode program for DOS (just like
any made with DJGPP) can switch to PMode using either a direct switch or
DPMI servises or VCPI services or even BIOS stuff (Int 15h).

bye.
Alexei A. Frounze
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