Path: utzoo!attcan!uunet!wuarchive!usc!cs.utexas.edu!swrinde!kent
From: kent@swrinde.nde.swri.edu (Kent D. Polk)
Newsgroups: comp.sys.amiga.tech
Subject: Re: PolyDraw replacement - waveform plotting
Keywords: PolyDraw, Blitter
Message-ID: <25677@swrinde.nde.swri.edu>
Date: 20 Mar 90 19:23:40 GMT
References: <25661@swrinde.nde.swri.edu> <133167@sun.Eng.Sun.COM>
Reply-To: kent@swrinde.UUCP (Kent D. Polk)
Distribution: na
Organization: Southwest Research Institute, San Antonio, Texas
Lines: 27

In article <133167@sun.Eng.Sun.COM> cmcmanis@sun.UUCP (Chuck McManis) writes:
>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

Could you please point me a bit further in this direction? Such as
example code? I've looked around for quite some time now and have
seen nothing but the blitter line-mode stuff that I mentioned.
Unfortunately, I'm not an assembler programmer, but can hack a bit
once I know where I'm going. (What's a DDA?)

Thanks,
Kent Polk

--------------------------------------------------------
Personal to Tomas Rokicki:
Did my mail response make it to you?
(I sent it yesterday)