From: Shawn Hargreaves <Shawn AT talula DOT demon DOT co DOT uk>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: Help: What causes screen flash problem in Allegro 2.0?
Date: Tue, 7 Jan 1997 20:21:50 +0000
Organization: None
Lines: 16
Distribution: world
Message-ID: <QVeXC0AeBr0yEwDh@talula.demon.co.uk>
References: <32ccb401 DOT 3331475 AT news DOT diac DOT com> <5aqpf4$704 AT nntp DOT novia DOT net>
 <32D10D3E DOT 52DB AT novia DOT net>
NNTP-Posting-Host: talula.demon.co.uk
MIME-Version: 1.0
To: djgpp AT delorie DOT com
DJ-Gateway: from newsgroup comp.os.msdos.djgpp

Dead_and_gone writes:
>to add these two lines to your code to make it wait till the end of the 
>verical retrace-
>
>while (!(inportb(0x3DA)&0x08));
>while ((inportb(0x3DA)&0x08));

Not true. Allegro waits for the retrace automatically when you call
scroll_screen(), or at least it should. If adding those two lines fixes
the problem, there's a problem with Allegro, so please let me know what
happens!

/*
 *  Shawn Hargreaves - shawn AT talula DOT demon DOT co DOT uk - http://www.talula.demon.co.uk/
 *  Ghoti: 'gh' as in 'enough', 'o' as in 'women', and 'ti' as in 'nation'.
 */