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From: kentd@FtCollins.NCR.com (Kent.Dalton)
Newsgroups: comp.sys.atari.st
Subject: Number of bitplanes vs. number of colors (was Re: MegaSTe info)
Message-ID: <KENTD.91Feb12134618@zappa.FtCollins.NCR.com>
Date: 12 Feb 91 13:46:18 GMT
References: <1991Feb03.062924.15318@ecst.csuchico.edu>
	<1991Feb3.121355.5874@marlin.jcu.edu.au>
	<KENTD.91Feb6094457@zappa.FtCollins.NCR.com>
	<1991Feb8.080417.8298@daffy.cs.wisc.edu> <8305855@arium.stgt.sub.org>
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In-reply-to: be@arium.stgt.sub.org's message of 9 Feb 91 19:20:18 GMT


<8305855@arium.stgt.sub.org> writes, RE: 640x400x2 :
> Well should mean 'two bitplanes' what gives a choise of 4 colours.
>
> TschauTschau
>		Bernd

I'm pretty sure you're wrong, at least in the context of how the numbers were
presented in the original article. To quote from the original post:

> <good stuff deleted... >
>
> 
> What is also confusing is that the mono mode indicated in the manual
> says two colors are available on the MEGA STe, from a palette of 4096,
> at 640x400?!  I of course can't test this as I only have the SM124
> to work on.
>
> < more good stuff deleted... >
>
> Graphics                                         320x200x16
>                                                  640x200x4
>                                                  640x400x2
>
> Color                                            4096 Colors

Proof: for 320x200 to have 16 bit planes the color pallette (sic) would
have to be _at_least_ 65536.
 
So, to summarize: #of possible colors to choose from = 4096, X rez = 640,
Y rez = 400, # of simultaneous colors for display on screen = 2

Sorry for the repost, to any who understood the first time, but I hate to see 
misinformation on the 'net. :^)

Thanks, to the original reviewer by the way!

--
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