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Article #617Re: Split screen mode: Why? (was Re: 320x400 question)
From: Khan
Date: Wed, 12 Aug 1992 13:01
Date: Wed, 12 Aug 1992 13:01
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1349 bytes
In article <1992Aug11.205954.6321@wam.umd.edu> dmb@wam.umd.edu (David M. Baggett) writes: >bytor@milton.u.washington.edu writes: > >>This also allows for the double buffered area to be flipped faster, >>since less of it will need to be displayed. > >But that displaying is done by the shifter hardware and monitor, so why >would split screen mode make it faster? I think what ByTor means is that the flipped portions are smaller, and can be drawn faster (and thus flipped at a faster rate). You're right in that it takes the same amount of time to flip a screen, no matter how many scan lines the flipped portion covers. In all cases it's simply a CPU write to a register which tells the VGA card where to begin fetching bytes from the video buffer.
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<1992Aug11.205954.6321@wam.umd.edu> <Bsts4L.15r@news.cso.uiuc.edu> <1992Aug11.172313.26619@wam.umd.edu> <bytor.713564132@milton>Show Full Headers
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Path: arc1-ca.pugleaf.net!sparky!uunet!dtix!darwin.sura.net!zaphod.mps.ohio-state.edu!moe.ksu.ksu.edu!ux1.cso.uiuc.edu!news.cso.uiuc.edu!usenet From: tmkk@uiuc.edu (Khan) Newsgroups: rec.games.programmer Subject: Re: Split screen mode: Why? (was Re: 320x400 question) Message-ID: <BsvG5q.6nD@news.cso.uiuc.edu> Date: 12 Aug 92 13:01:01 GMT References: <1992Aug11.205954.6321@wam.umd.edu> <Bsts4L.15r@news.cso.uiuc.edu> <1992Aug11.172313.26619@wam.umd.edu> <bytor.713564132@milton> Sender: usenet@news.cso.uiuc.edu (Net Noise owner) Organization: University of Illinois at Urbana Lines: 16