From:	alaric AT oasis DOT novia DOT net (Alaric Dailey)
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: Help: What causes screen flash problem in Allegro 2.0?
Date:	6 Jan 1997 11:59:32 GMT
Organization:	Novia Internetworking <> 28.8kbps dialup; 402/390-2NET
Lines:	17
Message-ID:	<5aqpf4$704@nntp.novia.net>
References:	<32ccb401 DOT 3331475 AT news DOT diac DOT com>
NNTP-Posting-Host:	oasis.novia.net
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp

radams AT mail DOT diac DOT com wrote:
: void flip_page() {
: 	if (active_page==page1) {
: 		scroll_screen(0,0);
: 		active_page=page2;
: 		inactive_page=page1;
: 	}
: 	else {
: 		scroll_screen(0,SCREEN_H);
: 		active_page=page1;
: 		inactive_page=page2;
: 	}
: }
: 
does scroll_screen() wait for a vertical retrace if not that is probably
your problem, otherwise I don't know let me ponder and I will try to come
up with something else.

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