Date:	Sat, 11 Mar 2000 18:35:50 +0600 (LKT)
From:	Kalum Somaratna aka Grendel <evilgrendel AT gmx DOT net>
X-Sender:	root AT darkstar DOT grendel DOT net
To:	djgpp AT delorie DOT com
Subject:	Re: Page Flipping with Allegro?
In-Reply-To:	<MPG.13339d04ea6580a798b984@news.freeserve.net>
Message-ID:	<Pine.LNX.4.10.10003111829060.633-100000@darkstar.grendel.net>
MIME-Version:	1.0
Reply-To:	djgpp AT delorie DOT com
Errors-To:	dj-admin AT delorie DOT com
X-Mailing-List:	djgpp AT delorie DOT com
X-Unsubscribes-To:	listserv AT delorie DOT com

On Sat, 11 Mar 2000, Andrew R. Gillett wrote:

> In comp.os.msdos.djgpp, Kalum Somaratna aka Grendel wrote:
> > >and some more code along with it to handle the flipping and such,
> > 
> > ?? AFAIK scroll_screen does wait for the vsync before modifying any
> > registers, so what exactly is this code that you wrote to handle the
> > flipping.
> 
> vsync doesn't work on all VESA implementations, which may be why the 
> reason that Al is getting flicker.

I think that you are meaning that the VGA register based method of
detecting the vsync won't work with all vesa based implementations. 

This is correct _BUT_ AFAIK Allegro uses the VESA based method of
obtaining info about vsync etc.. so this should not be a problem as
reagrds to Al's usage of the Allegro code.

But I am curious about what exactly Al meant by "some more code to handle
the flipping" as it might be this bit of code that is causing the flicker
etc..

So it would be nice if he could produce the relevant code.

Grendel

Hi, I'm a signature virus. plz set me as your signature and help me spread
:)

- Raw text -