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From: "Charles Sandmann" <cwsdpmi AT earthlink DOT net>
Newsgroups: comp.os.msdos.djgpp
References: <0df9b95543446757577a645d3348dfb8 AT wacontrols DOT com> <201105092002 DOT p49K2kWq015907 AT delorie DOT com> <834o53ipif DOT fsf AT gnu DOT org> <201105092034 DOT p49KYRmA016966 AT delorie DOT com>
Subject: Re: Compiling Desqview/X "qdlib200 & qdtkt200" sources with DJGPP 2.03
Date: Mon, 16 May 2011 19:07:14 -0500
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To: djgpp AT delorie DOT com
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Reply-To: djgpp AT delorie DOT com

"DJ Delorie" <dj AT delorie DOT com> wrote in message 
news:201105092034 DOT p49KYRmA016966 AT delorie DOT com...
>
>> Direct access to certain addresses in DOS memory, AFAIR.
>
> We still have the ability to do that.  IIRC it was the
> page-fault-mapped graphics buffer that it required, but I would assume
> the X server would need that, not the clients.

I wrote an add-in extension for DPMI 1.0 hosts (and CWSDPMI) that
supported the page-fault-mapped graphics, but there was no interest
(world had moved to linear mapped frame buffers).

Yes, a long time ago.