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From: campbell@maynard.UUCP
Newsgroups: comp.sys.ibm.pc
Subject: Re: Cooling down (more on IBM PS/2) (really Rainbow graphics)
Message-ID: <896@maynard.BSW.COM>
Date: Tue, 14-Apr-87 07:29:50 EST
Article-I.D.: maynard.896
Posted: Tue Apr 14 07:29:50 1987
Date-Received: Wed, 15-Apr-87 05:57:56 EST
References: <1750@isis.UUCP> <199@homxc.UUCP> <1977@hoptoad.uucp> <1619@bnrmtv.UUCP> <547@neoucom.UUCP>
Reply-To: campbell@maynard.UUCP (Larry Campbell)
Organization: The Boston Software Works, Inc.
Lines: 20
Keywords: Rainbow graphics

In article <547@neoucom.UUCP> wtm@neoucom.UUCP (Bill Mayhew) writes:
>                                                 ...  The new IBMs
>even run MS-DOS that is *somewhat* usable with current software,
>just like the Rainbow.  The Rainbow even offered stunning graphics:
>800 * 480 in 16 colors, RGB analog.

Not quite.  The Rainbow has two graphics modes -- 384x240x16 and
800x240x4.  It is analog RGB (this RGBI stuff is stupid) and the DEC
monitor is of very high quality, so the effect is superb.  However,
there's one fatal flaw.  Rainbow graphics aren't memory mapped, so they
are s-l-o-w.  OK for still pictures, useless for interactive graphics.

(If you go back and look at the earliest pictures of Microsoft Windows
published in magazines two years ago, you'll notice that they were all
done on a Rainbow, since in those pre-EGA days that was the best PC
graphics available...)
-- 
Larry Campbell                                The Boston Software Works, Inc.
Internet: campbell@maynard.BSW.COM          120 Fulton Street, Boston MA 02109
uucp: {alliant,think,wjh12}!maynard!campbell        +1 617 367 6846