Horizontal Scrolling

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#3481

From: Martijn Dijksterhuis
Date: Sat, 03 Oct 1992 13:35

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Together with some friends of mine i'm writing a program that is in dire need of a smooth scrolling routine for the 0x13Hex VGA (320x200x256) mode.

We have tried copying memory blocks from a (fast) block on the main memory board into the (slow) VGA own's storage. The result is much to slow (on a 40Mhz machine) to be actualy used. Copying is done by the CPU through a simple
'rep movsw' instruction.

Somebody knowns a kind of logic to solve this problem ?

Greets,
Martijn

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Path: arc1-ca.pugleaf.net!sparky!uunet!math.fu-berlin.de!Germany.EU.net!mcsun!sun4nl!wtrlnd!monly.wlink.nl!news-daemon
From: Martijn.Dijksterhuis@p6.f17.n512.z2.wlink.nl (Martijn Dijksterhuis)
Newsgroups: comp.os.msdos.programmer
Subject: Horizontal Scrolling
Message-ID: <718222072.F00001@monly.wlink.nl.monly.wlink.nl>
Date: Sat, 03 Oct 1992 12:35:00 -0100
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