Newsgroups: comp.sys.atari.st.tech
Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!sdd.hp.com!elroy.jpl.nasa.gov!jato!vsnyder
From: vsnyder@jato.jpl.nasa.gov (Van Snyder)
Subject: Re: Hardware -vs- Software Scrolling
Message-ID: <1991Apr3.230728.17011@jato.jpl.nasa.gov>
Keywords: scrolling
Reply-To: vsnyder@jato.Jpl.Nasa.Gov (Van Snyder)
Organization: Jet Propulsion Laboratory, Pasadena, CA
References: <150708@pyramid.pyramid.com>
Date: Wed, 3 Apr 91 23:07:28 GMT

In article <150708@pyramid.pyramid.com> wniren@pyrtech.pyramid.com (Walter "Crash" Nirenberg) writes:
>My question is what's the difference between scrolling routines written
>for an older system and a new system with hardware scrolling?  Would I have
>to completely rewrite them to take advantage of the hardware or would it be
>a minor modification?
I've been using the raster operations in VDI and LineA, in the hope that the
OS will automatically take advantage of the hardware when it's there.  If
I'm wrong, will somebody please post?

-- 
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