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Article #617

Re: Split screen mode: Why? (was Re: 320x400 question)

#617
From: Khan
Date: Wed, 12 Aug 1992 13:01
16 lines
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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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>
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