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Article #1218

Re: PC Sprite Engine

#1218
From: Stuart George Carnie
Date: Thu, 15 Oct 1992 03:34
29 lines
1986 bytes
Who said you can't scroll the VGA smoothy.  I've done it, on SLOW computers.
All you need to do is switch to 256k mode, and then change the start-address-
high/low registers and wait for a Vertical Retrace. If you keep changing this
offset, you will create a smooth scrolling background.

I believe the sprite engine should be connected to the VGA via a cable on the output (ie same way the video blaster works), and all it needs is some sprites, and one more level of scrolling (to create parallax scrolling). 512k min though.
Imagine this:

The VGA has a split-screen capability, so turn that on for scores, etc, then scroll around a super-bitmap on the standard VGA, and then on the sprite-engine,
chuck on the sprites and the other virtual screen and scroll it.  
We would even have time to play a 4-track mod in the background.

Look what we have...

A real arcade machine, and the sprites would even be useful in animation OR
windows would even benefit from it aswell.

Anyway, hopefully someone who can build a similar device reads these messages,
because they would DEFINATELY sell.

Someone reply to my creative labs message, and I'll get incontact with them.

Cheers, Stuart
-- 
scarnie@esk.compserv.utas.edu.au

"On a distant planet, a creature strums his guitar..." {:-)
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From: scarnie@esk.compserv.utas.edu.au (Stuart George Carnie)
Subject: Re: PC Sprite Engine
Message-ID: <1992Oct15.033408.27563@cam.compserv.utas.edu.au>
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Organization: University of Tasmania at Launceston
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Date: Thu, 15 Oct 92 03:34:08 GMT
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