From:	"François Poirier" <fpoirier AT aei DOT ca>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Double buffering
Date:	Tue, 29 Dec 1998 16:07:51 -0500
Organization:	AEI Internet
Lines:	13
Message-ID:	<368944A7.21F3EDCD@aei.ca>
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To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp
Reply-To:	djgpp AT delorie DOT com

How can I use double buffering
when the __djgpp_conventional_base is changing sometime
when using a linear frame buffer code like the one below.
BTW I use VESA 2.0 mode 0x101
with the near ptr enable (and I want to keep it that way).
I know how to create a selector but selector
seem to use far ptr and I want to keep the near ptr for speed. (It is
possible?).

  unsigned char *video;
  video = (unsigned char *)linear_address;
  video[y * Max_X + x + __djgpp_conventional_base] = couleur;

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