VGA Register level access to vertical retrace

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#1949

From: Ammo Goettsch
Date: Tue, 12 Jan 1993 19:48

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I really badly need to find information how to grab the vertical retrace 
irq if there is such a thing or else how to detect vertical retrace on a 
standard VGA card. Even if you just know where to look for it, please email
me as soon as possible.

The mode I am interested in is 640x480x4 bit.

Ammo

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Message-ID: <1993Jan12.194818.2310@cc.gatech.edu>

Path: arc1-ca.pugleaf.net!sparky!uunet!zaphod.mps.ohio-state.edu!darwin.sura.net!gatech!cc.gatech.edu!news

References: <73428@cup.portal.com>

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Newsgroups: rec.games.programmer
Path: arc1-ca.pugleaf.net!sparky!uunet!zaphod.mps.ohio-state.edu!darwin.sura.net!gatech!cc.gatech.edu!news
From: ammo@cc.gatech.edu (Ammo Goettsch)
Subject: VGA Register level access to vertical retrace
Message-ID: <1993Jan12.194818.2310@cc.gatech.edu>
Sender: news@cc.gatech.edu
Reply-To: ammo@cc.gatech.edu (Ammo Goettsch)
Organization: Georgia Institute of Technology
References: <73428@cup.portal.com>
Distribution: usa
Date: Tue, 12 Jan 1993 19:48:18 GMT
Lines: 8

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