Sender: fabrice AT asim DOT lip6 DOT fr
Message-ID: <347EF0EF.4E9F@trash.lip6.fr>
Date: Fri, 28 Nov 1997 17:27:27 +0100
From: Fabrice ILPONSE <fabrice AT asim DOT lip6 DOT fr>
MIME-Version: 1.0
To: djgpp users group <djgpp AT delorie DOT com>
Subject: BLITTING (in some case)
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
Precedence: bulk

Hi!
	I was wondering for something:

	Imagine:
		- you've written your own graphical routines. (not in VESA)
		- you use a shadow buffer to free you prog from flicker

	Has anydoby try to use the DMA mem to mem programming to blit a buffer.
Your buffer is supposed to be under the 1Mo.

	Does anybody knows if there's a way to indicate to the video card not
to refresh its video memory so the modification to the processor memory
would not be seen at the screen and then re-enable the refresh (in
precise: of the video memory, not of the screen) ?
 
-- 
	^ ^ ^
	| | |
	+-+-+	Fabrice ILPONSE
	  |	<fabrice AT asim DOT lip6 DOT fr>
	  |
	  |
	  -