Date: 15 May 96 17:46:35 +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: 0xa0000 and dpmi_segment_to_descriptor
Message-Id: <9605151747.AA07500@bbb.no>

 
John Fortin <fortin44 AT eelab DOT newpaltz DOT edu> said:
 
> I don't understand why we can't use a function such as
> dpmi_segment_to_descriptor to map this to a linear address without
> the disadvantages of the 'fat ds' method.  What am I missing here??
 
I think you mean "__dpmi_map_conventional_memory_in_memory_block()"
 
I think we are up against the incomplete functionality of DPMI 0.9.
Linear mapping is a function only implemented in v1.0 of the DPMI spec.
i.e. OS/2 DOS boxes or Qualitas 386MAX. CWSDPMI also have this function
(allthough not all 1.0 functions).
 
BTW, what is so wrong with using the <farptr.h> functions ?
IMHO If you are lacking speed, you should optimize elsewhere.
 
Gisle V.