From:	"Charles Sandmann" <sandmann AT clio DOT rice DOT edu>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: Q : DPMI 1.0 Function 0x508
Date:	Thu, 27 Apr 2000 17:25:43
Organization:	Aspen Technology, Inc.
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> 1. How does one emulate __djgpp_map_physical_memory() using only 0.9
> functions?

You can't.  It's a low level function which requires you mess with 
the page tables.  You could write a VxD for Windows if you could 
collect enough information to support it, or maybe use some of the
back doors to get to ring 0 and them manually manipulate the page
tables yourself.  Either of this is very likely to be much more 
effort than you're willing to spend ...

If you need read access only you could just copy the contents.  If
you are willing to keep a copy and periodically compare the two you
could update each copy on some time frequency.  A real mess.

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