Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!ucbvax!ucdavis!deneb.ucdavis.edu!u563694848ea
From: u563694848ea@deneb.ucdavis.edu (0040;0000008853;0;250;141;)
Newsgroups: comp.sys.amiga.tech
Subject: blitter operation speeds
Summary: how fast do certain blitter operations go?
Keywords: blit,need,for,speed,spam
Message-ID: <4087@ucdavis.ucdavis.edu>
Date: 25 Apr 89 22:11:48 GMT
Sender: uucp@ucdavis.ucdavis.edu
Reply-To: s110018@pollux.ucdavis.edu (Bruce Rogers)
Distribution: comp.sys.amiga.tech
Organization: University of California, Davis
Lines: 16

Hi there,

	I'm currently working on blitter routines, (for that number one
amiga application which requires high speed graphics...) and would appreciate
some info as to how fast certain operations go.

Mainly, what is the difference in speed between doing a full A+B+C->D
blit and a simple A->D operation? Does the blit go faster if the
dma is turned off (reusing the same data) for one or two channels
in a A+B+C->D operation?

I don't need absolute speeds, percent offset from the A+B+C->D mode
would be perfect.

Thanks in advance - Bruce (When am I going to finish that damn game!) Rogers
(currently s110018@pollux.ucdavis.edu )