Date: 15 May 96 17:45:22 +0100
From: Gisle Vanem <Giva AT bbb DOT no>
To: DJGPP AT delorie DOT com
Cc: gv AT nera DOT no, Giva AT bbb DOT no
Subject: Re: djgpp 2 DPMI
Message-Id: <9605151746.AA07489@bbb.no>

 
Shawn Hargreaves <slh100 AT unix DOT york DOT ac DOT uk> said:
 
> That would cover "absence of DPMI", but what about "faults"? Binding a
> DPMI host into the program is no good if the machine is already running a
> buggy DPMI: you can't load up and use cwsdpmi in a win95 DOS box, for
> example.
 
I understand that there are "soft" and "hard" DPMI hosts. OS/2 or Win95
would classify as "hard", QDPMI as "soft". The ability of some DOS
extenders (PharLap and DOS4G ?) to complety bypass the DPMI host is by entering
real-mode (via the VCPI interface). This is not possible under OS/2,Win95.
 
BTW This feature is used by LoadLin to load Linux from the DOS prompt
with QDPMI active !! (Archie for lodlin16.zip. sources included)
 
Someone wih more info on this, please correct me and fill me in.
 
Gisle V.