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
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References: <32ccb401 DOT 3331475 AT news DOT diac DOT com>
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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.