From:	gfoot AT mc31 DOT merton DOT ox DOT ac DOT uk (George Foot)
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: Djgpp Graphics Programming - far vs near pointer
Date:	19 Feb 1997 18:09:10 GMT
Organization:	Oxford University
Lines:	26
Message-ID:	<5effk6$s1o@news.ox.ac.uk>
References:	<01bc1560$d66f66c0$1a4f3181 AT workstation>
NNTP-Posting-Host:	mc31.merton.ox.ac.uk
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp

Louis Antoine (lantoine AT ic DOT sunysb DOT edu) wrote:
: 	I am hoping that someone can answer these questions on accessing the video
: memory under djgpp. I have read a lot of intro to graphics programming
: material for Djgpp and found that all of them basically state that
: accessing the memory with near pointers is faster although it disables
: memory protection.

: QUESTIONS

: (1). Will disabling memory protection affect my operating system which is
: running in protected mode? ( Windows 95, OS/2, etc. )

: (2). Is there an alternative method to accessing the video memory with the
: speed of the near pointer but without disabling memory protection?

: (3). Watcom compiler provides a near pointer to the video memory while in
: protected mode. Does it disable memory protection as well? If not, is it
: possible to use the same methods used by this compiler under Djgpp to
: access the video memory?

:                                         Thanks To Anyone Who Responds.

--
-- 
George Foot <gfoot AT mc31 DOT merton DOT ox DOT ac DOT uk>
Merton College, Oxford.

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