Path: utzoo!attcan!utgpu!cunews!bnrgate!bigsur!bnr-rsc!bcarh185!schow
From: schow@bcarh185.bnr.ca (Stanley T.H. Chow)
Newsgroups: comp.arch
Subject: Re: Let's pretend
Message-ID: <3853@bnr-rsc.UUCP>
Date: 20 Dec 90 18:07:52 GMT
References: <3066@crdos1.crd.ge.COM> <5813@labtam.labtam.oz>
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Reply-To: bcarh185!schow@bnr-rsc.UUCP (Stanley T.H. Chow)
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In article <5813@labtam.labtam.oz> graeme@labtam.labtam.oz (Graeme Gill) writes:
>    I'm happy to say you are wrong. How does 208 Mbit/sec fill rate sound ?
>Or a 100 Mbit/sec blt rate sound ? That's equivalent to 30 frames a second
>fill rate on an 8 bit colour 1024 x 800 system, all done in software, no
>hardware support. It only took me a few weeks work, to code up the routines,
>and our customers don't have to know anything about it, since all they
>see is a standard X11 interface. This isn't pie in the sky, we've been 


Hmm, 208 MBit/sec = 26 MByte = 26 MPixel of 8 bits each.

How do you do 26 million byte writes per second on a 80960? What speed are you
running it at? How is your frame buffer organized?

Also, how much CPU is left for the user applications?




Stanley Chow        BitNet:  schow@BNR.CA
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Me? Represent other people? Don't make them laugh so hard.