Xref: news-dnh.mv.net comp.os.msdos.djgpp:802
Path: news-dnh.mv.net!mv!news.sprintlink.net!europa.chnt.gtegsc.com!news.umbc.edu!haven.umd.edu!purdue!oitnews.harvard.edu!news.sesqui.net!rice!news!sandmann
From: Charles Sandmann <sandmann AT clio DOT rice DOT edu>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: DPMI and graphics
Date: Fri, 07 Jul 1995 07:53:13 CDT
Organization: Rice University, Houston, Texas
Lines: 15
References: <DBCE25 DOT 5Fq AT bath DOT ac DOT uk>
Reply-To: sandmann AT clio DOT rice DOT edu
Nntp-Posting-Host: clio.rice.edu
To: djgpp AT sun DOT soe DOT clarkson DOT edu
Dj-Gateway: from newsgroup comp.os.msdos.djgpp

> If you are compiling using DJGPP with DPMI is it still possible to write 
> directly to the screen, using address 0xD0000000 I mean?

No.

> If it is not possible, how does GRX do it?

GRX V2 uses <sys/farptr.h> type routines (it has it's own internal ones 
actually I think).  A hack to do it directly under DJGPP V2 & DPMI is
in the works but not finished yet

> I belive you have to be in DPMI mode to get the graphics
> working in a DOS box in Windows, is this right?

Correct.