Path: utzoo!attcan!uunet!cs.utexas.edu!sun-barr!newstop!sun!stpeter!cmcmanis
From: cmcmanis@stpeter.Sun.COM (Chuck McManis)
Newsgroups: comp.sys.amiga.tech
Subject: Re: PolyDraw replacement - waveform plotting
Keywords: PolyDraw, Blitter
Message-ID: <133167@sun.Eng.Sun.COM>
Date: 20 Mar 90 18:10:19 GMT
References: <25661@swrinde.nde.swri.edu>
Sender: news@sun.Eng.Sun.COM
Reply-To: cmcmanis@sun.UUCP (Chuck McManis)
Distribution: na
Organization: Sun Microsystems, Mountain View
Lines: 16

In article <25661@swrinde.nde.swri.edu> (Kent D. Polk) writes:
>Any suggestions for getting the speed I need out of this machine?
>Would an assembler line draw routine be faster on the '020 than a
>blitter one? If so about how much and does anyone have source I could
>start with?

A fast line draw routine (such as a DDA) that fits inside the instruction
cache of the '020 and maximizes register uses will give you the best
performance. Even better would be to do the actual drawing in 32bit RAM
and then using a fast data copy routine to put it into Chip ram. 


--Chuck McManis
uucp: {anywhere}!sun!cmcmanis   BIX: cmcmanis  Internet: cmcmanis@Eng.Sun.COM
These opinions are my own and no one elses, but you knew that didn't you.
"If it didn't have bones in it, it wouldn't be crunchy now would it?!"