From: "Charles Sandmann" <sandmann AT clio DOT rice DOT edu>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: Problem accessing absolute physical address >1MB
Date: Tue, 28 Sep 1999  0:06:36
Organization: Aspen Technology, Inc.
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Message-ID: <37f0068c.sandmann@clio.rice.edu>
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To: djgpp AT delorie DOT com
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> Long term I need to access physical memory that resides between 256MB
> and 512MB. Does anyone have any suggestions on how to do this with DJGPP?
> I know it is a bizarre requirement.:-)

You can map this like a physical device with the DPMI calls.  Hopefully you
aren't planning to access all 256Mb of it, since this will spew page tables.

Work item #42 never done- support 4Mb page table entries.