Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!wuarchive!gem.mps.ohio-state.edu!apple!oliveb!amiga!jimm
From: jimm@amiga.UUCP (Jim Mackraz)
Newsgroups: comp.sys.amiga.tech
Subject: Re: 4096 Hires
Message-ID: <4811@amiga.UUCP>
Date: 10 Nov 89 00:22:08 GMT
References: <4801@sdcc6.ucsd.edu> <11906@mcdphx.phx.mcd.mot.com> <4463@sugar.hackercorp.com> <955@madnix.UUCP> <4483@sugar.hackercorp.com>
Reply-To: jimm@batgirl.UUCP (Jim Mackraz)
Organization: Commodore-Amiga Inc, Los Gatos CA
Lines: 23

In article <4483@sugar.hackercorp.com> peter@sugar.hackercorp.com (Peter da Silva) writes:
)What's wrong with:
)
)	For each four lines:
)		Choose color table for these lines, based on
)			color frequencies.
)
)> Using the copper to do this "kludge" also chews up the CPU pretty well, since
)> it steals all of its cycles from the CPU.
)
)Yeh, but it's designed for this task and the opcodes are smaller. Total memory
)bandwidth is reduced. And if you just do it with a custom copper list for a
)screen it's easier to integrate with Intuition.

The question is: how many color palette "move" instructions can you execute
per scanline, if the picture is severely overscanned?

	jimm
-- 
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