Re: VGA buffer address

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#1121

From: DAVID SCOTT PASCHAL
Date: Sat, 22 Aug 1992 20:06

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Standard CGA-compatible text modes use B800h as their buffer address, but EGA/
VGA/MCGA graphics modes use up to 64K starting at A000.  However, if you're
trying to directly read or modify pixels in graphics mode, you'll have to play
around with the hardware registers, since the EGA and VGA map 256K or more into
a space of just 64K.

Tschuess,
David Paschal

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Message-ID: <1992Aug22.200604.25610@ncsu.edu>

Path: arc1-ca.pugleaf.net!sparky!uunet!gatech!taco!dspascha

References: <92234.143304KSADEGH@auvm.american.edu>

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Newsgroups: comp.os.msdos.programmer
Path: arc1-ca.pugleaf.net!sparky!uunet!gatech!taco!dspascha
From: dspascha@eos.ncsu.edu (DAVID SCOTT PASCHAL)
Subject: Re: VGA buffer address
Message-ID: <1992Aug22.200604.25610@ncsu.edu>
Originator: dspascha@c00083-100lez.eos.ncsu.edu
Lines: 9
Sender: news@ncsu.edu (USENET News System)
Reply-To: dspascha@eos.ncsu.edu (DAVID SCOTT PASCHAL)
Organization: North Carolina State University, Project Eos
References:  <92234.143304KSADEGH@auvm.american.edu>
Date: Sat, 22 Aug 1992 20:06:04 GMT

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