Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!apple!sun-barr!newstop!sun!imagen!atari!portal!cup.portal.com!stephan
From: stephan@cup.portal.com (Stephen Derek Schaem)
Newsgroups: comp.sys.amiga
Subject: Re: 4096 colors in HIRES
Message-ID: <20207@cup.portal.com>
Date: 7 Jul 89 13:29:50 GMT
References: <20069@cup.portal.com> <409@xdos.UUCP> <20112@cup.portal.com>  <412@xdos.UUCP> <1166@atanasoff.cs.iastate.edu> <8721@thorin.cs.unc.edu>
Distribution: usa
Organization: The Portal System (TM)
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 T. J. Cullip, the open that conference to actually get the format decided and
then try to make CBM accept it.
 So if you have any suggestion you are welcome... 

	For you raytrace, Try not to use the last bitplane untill you have too
during that time you have upper half of the color table not on screen that
let you change the other register in that upper half.You can extand that and
do other checking of the like, so you can actually have alot more color on
one scanline than 16 (in hires).
	I calculated (more experienced:-) that you can change 44 register
in lores 5bitplane..Let me try in hires.. Well untill the Bitplane DMA
dont take odd cycle it's 44... 22 in hires 3 bitplane etc..
	Also you should check color table from scan line to the next, some can
be shared.... That give you more time to work on other register on the fly.
	Best case should be around 32 colors per scna line in HIRES...


	I wonder if the blitter could help... Anyway, hope those tips could
help a bit to creat THE best hires images ever made on the amiga.
Well imagine with 32 register changes (drag bar) :-)