From:	"sl" <junk AT bbs DOT darktech DOT org>
Newsgroups:	comp.os.msdos.djgpp
Subject:	VBE 1.2 -- question
Date:	Tue, 04 Jan 2000 23:41:46 -0500 (EST)
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Message-ID:	<fyoofqnexgrpubet.fnuidm0.pminews@nntp.generation.net>
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To:	djgpp AT delorie DOT com
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Reply-To:	djgpp AT delorie DOT com

Hi,

	I was wondering how video-page scrolling and flipping works. I mean,
I know what these two functions are used for, but I was wondering how the
memory used for multiple pages is actually mapped. Lets say I wanted to write
to page 2 (assuming page 1 is the visible page), would I simply write into
the memory directly following page 1? What happens if I wanted to
write/plot-pixels into an area of the virtual scanline which is not visible?
Where would I write to then? I'm basically asking about the memory model
being used to support these two features so I can add support for them in my
video library.

Thanks,

Gili

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