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From: sansom@trwrb.UUCP
Newsgroups: comp.sys.atari.st
Subject: Re: Emulating Amiga with ST and vice-versa
Message-ID: <1748@trwrb.UUCP>
Date: Fri, 3-Apr-87 11:16:46 EST
Article-I.D.: trwrb.1748
Posted: Fri Apr  3 11:16:46 1987
Date-Received: Sun, 5-Apr-87 09:52:17 EST
References: <1175@spice.cs.cmu.edu>
Reply-To: sansom@trwrb.UUCP (Richard Sansom)
Organization: TRW EDS, Redondo Beach, CA
Lines: 19

In article <1175@spice.cs.cmu.edu> mjp@spice.cs.cmu.edu (Michael Portuesi) writes:
>As far as emulating the ST with the Amiga, that would be tough as
>well.  The hardware for the two machines support displays rather
>differently.  The Amiga uses a bit-plane oriented approach, the ST
>uses a linear arrangement...

The ST's display does, in fact, use memory mapped bit-planes.  The number of
planes it uses is, of course, dependent on the screen resolution.  Low
resolution (320 x 200, 16 colors) uses four bit planes _interleaved_ in
memory (not linear), medium resolution (640 x 200, 4 colors) uses two bit
planes, and high resolution (640 x 400, 2 "colors") uses one bit plane
(which is, in effect, a linear arrangement).

-Rich
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  /// Richard E. Sansom                   TRW Electronics & Defense Sector \\\
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