Newsgroups:	comp.os.msdos.djgpp
From:	manni AT hotbot DOT com (Manni Heumann)
Subject:	ALLEGRO: Vesa and Refresh rate
X-Newsreader:	News Xpress 2.01
Date:	Fri, 13 Nov 1998 09:18:56 GMT
NNTP-Posting-Host:	dhcp33-242.uni-bielefeld.de
Message-ID:	<364bf97f.0@news.uni-bielefeld.de>
X-Trace:	13 Nov 1998 10:18:55 +0200, dhcp33-242.uni-bielefeld.de
Lines:	13
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp
Reply-To:	djgpp AT delorie DOT com

To the ALLEGRO-Pros:

I often use Vesa 1 graphics mode 640x480. I need to influence the refresh 
rate, not because I want flicker free displays, but because I need to time the 
display very accurately.
So using vsync() and a ms-timer (millisecond not that other bad word), I 
measured the time between refreshes, and on the average I always get some 13.6 
ms.
It doesn't matter, whether I use SciTech's utitlities that claim to influence 
refresh rate or use the Dos-Drivers of my VGA card.

Question: Am I on my own using vesa-modes with ALLEGRO, or can I get some 
utility to help me out?

- Raw text -