From: Hans-Bernhard Broeker <broeker AT physik DOT rwth-aachen DOT de>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: Physical Address Mapping under XP
Date: 7 Aug 2003 09:07:10 GMT
Organization: Aachen University of Technology (RWTH)
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Avi Berkovich <berkovis AT 012 DOT net DOT il> wrote:
> Hello,
>   After running my old Vesa VBE2 code on XP, I realized that the DPMI
> function for mapping a physical address for the LFB doesn't work under XP.

In Windows XP support for any kind of direct, and sometimes even for
_indirect_, hardware access by DOS programs is somewhere between
miserable and non-existant.

In particular, you can mostly forget about any VBE support whatsoever.
The only thing you can get to work somewhat reliably are the original
VGA/MCGA modes from 13 years ago, i.e. 640x480 AT 16 and 320x200 AT 256

In other words: for this kind of program, you better stay away from XP.
-- 
Hans-Bernhard Broeker (broeker AT physik DOT rwth-aachen DOT de)
Even if all the snow were burnt, ashes would remain.