From:	baldo AT chasque DOT apc DOT org
Message-Id:	<3.0.1.32.19970603032952.0068dad0@chasque.apc.org>
Date:	Tue, 03 Jun 1997 03:29:52 -0300
To:	Shawn Hargreaves <Shawn AT talula DOT demon DOT co DOT uk>
Subject:	ALLEGRO Re: Allegro problem
Cc:	djgpp AT delorie DOT com
In-Reply-To:	<MkTAdHAodxkzEwn5@talula.demon.co.uk>
References:	<33917F55 DOT E654C66D AT impsat1 DOT com DOT ar>
Mime-Version:	1.0

At 07:56 PM 02/06/1997 +0100, you wrote:
>>It's pretty simple, when I run the demo in 640x480 page flipping, the
>>lower half of the screen appears twice . So you never see the upper half
>>of the screen.
>
>What graphics driver is this using? (run the test.exe program in 640x480
>autodetect mode, it will display the driver name and description in the
>middle of the screen). Also, could you check the scrolling function in
>test.exe, and see if you can figure out exactly how it is going wrong?
>At a guess, you'll find that it is out by a power of two (either
>scrolling right and left by two pixels every time you press an arrow
>key, or only scrolling on every other keypress). If you could let me
>know which way the error is, and which driver it is using, that would
>help a lot...
>

	Hello, I am not Fernando Salas, I am Ivan Baldo. I have talked with
Fernando and Fernando and I we have the same video cards (Trident Agi9440).
	When I run your demo with de Trident driver and use Page Fliping the error
that describes Fernando ocurs. But when I use Vesa 2.0 or Vesa 1.x the
error disapears. When I use test.exe with de Trident driver and test the
scroll, the screen gets noised (i dont know how to speak english very
whell, sorry) only when I move, when stop moving the screen looks good.
	Sorry but I am not a good programmer and I can not help changing the
source code, but if you want, I can test the library for you.
	I want to help, hope this already helped. If there something that can I do
for you, please tell me!!!
	Congratulations for the library!!! Bye!

Ivan Baldo: baldo AT chasque DOT apc DOT org

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