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Mail Archives: djgpp/1995/01/27/07:06:55

From: "A.Appleyard" <A DOT APPLEYARD AT fs2 DOT mt DOT umist DOT ac DOT uk>
To: djgpp AT sun DOT soe DOT clarkson DOT edu
Date: Fri, 27 Jan 1995 08:54:12 GMT
Subject: Re: V2
Cc: djgpp AT sun DOT soe DOT clarkson DOT edu

Aaron Ucko <UCKO AT VAX1 DOT ROCKHURST DOT EDU> wrote:-
> ... Under VCPI, it is possible to guarantee that physical memory gets mapped
> to E0000000--EFFFFFFF, etc. Under DPMI, this is no longer possible, which is
> a problem to several bits of code, especially those pertaining to graphics.
> BTW, have any GRX drivers been made supporting direct linear mapping (I know
> that at least my Cirrus Logic card supports this)? If so, the problem would
> be somewhat alleviated...

Please! I have an important Gnu C++ program that absolutely depends on knowing
what addresses the text screen gets mapped to, as well as in a few places
needing to know what addresses the physical memory (at least the lowest
megabyte of RAM) gets mapped to.

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