From: Damian Yerrick <DONT DOT YOU DOT DAREd_yerrick AT hotmail DOT comSEND DOT SPAM>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: Page Flipping with Allegro?
Organization: Pin Eight Software  http://pineight.8m.com/
Message-ID: <vi1lcsslvpb7i1kk1nk7j7mhrhc9ng1dbf@4ax.com>
References: <MPG DOT 13339d04ea6580a798b984 AT news DOT freeserve DOT net> <Pine DOT LNX DOT 4 DOT 10 DOT 10003111829060 DOT 633-100000 AT darkstar DOT grendel DOT net>
X-Newsreader: Forte Agent 1.7/32.534
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
Lines: 32
X-Trace: /bQNua8q4STAB9FN5CJC0P0fdvvyFuA7V2kA6FT2Ic/9Y7NcLvHqtTqyRNV/im/xJTZs4QCSg+Uz!AGG7hnOmPEZ4qiAopTc8G9pj6lyXXr1Da18xPxlNdCmLsCba+QGTuaEh9DLPQhpY8Gc4nJhkybB/!yTCFWk0=
X-Complaints-To: abuse AT gte DOT net
X-Abuse-Info: Please be sure to forward a copy of ALL headers
X-Abuse-Info: Otherwise we will be unable to process your complaint properly
NNTP-Posting-Date: Sat, 11 Mar 2000 17:47:47 GMT
Distribution: world
Date: Sat, 11 Mar 2000 17:47:47 GMT
To: djgpp AT delorie DOT com
DJ-Gateway: from newsgroup comp.os.msdos.djgpp
Reply-To: djgpp AT delorie DOT com

On Sat, 11 Mar 2000 18:35:50 +0600 (LKT), Kalum Somaratna aka Grendel
<evilgrendel AT gmx DOT net> wrote:

>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.

Voodoo cards don't even work with that.

-- 
Damian Yerrick  http://yerricde.tripod.com/
Comment on story ideas: http://home1.gte.net/frodo/quickjot.html
AOL is sucks! Find out why: http://anti-aol.org/faqs/aas/
View full sig: http://www.rose-hulman.edu/~yerricde/sig.html

This is McAfee VirusScan. Add these two lines to your .sig to
prevent the spread of .sig viruses.  http://www.mcafee.com/