Re: Vertical Retrace Interrupt (?)

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#422

From: Court Demas
Date: Wed, 05 Aug 1992 14:56

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Oops.  It's on the CRT Controller (03d4h).  The Vertical Retrace End
is Index 11h and the bits are:
D5 - Enable Vertical Interrupt (0=Enable)
D4 - Clear Vertical Interrupt (0=clear)
D3-D0 - Vertical Retrace End - "The vertical retrace will end when the low
order 4 bits of the horizontal scan counter equal this value"

thanks..

-court

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Organization: Sophomore, Math/Computer Science, Carnegie Mellon, Pittsburgh, PA
Path: arc1-ca.pugleaf.net!sparky!uunet!cis.ohio-state.edu!news.sei.cmu.edu!fs7.ece.cmu.edu!crabapple.srv.cs.cmu.edu!andrew.cmu.edu!cd2a+
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Message-ID: <YeTykQa00WB7I3IIQh@andrew.cmu.edu>
Date: Wed,  5 Aug 1992 10:56:28 -0400 
From: Court Demas <cd2a+@andrew.cmu.edu>
Subject: Re: Vertical Retrace Interrupt (?)
Lines: 11