Path: utzoo!news-server.csri.toronto.edu!rutgers!cbmvax!daveh
From: da...@cbmvax.commodore.com (Dave Haynie)
Newsgroups: comp.sys.amiga.hardware
Subject: Re: Max Bandwidth of Zorro
Message-ID: <19743@cbmvax.commodore.com>
Date: 11 Mar 91 19:07:28 GMT
References: <325@wrdis01.af.mil>
Reply-To: da...@cbmvax.commodore.com (Dave Haynie)
Distribution: usa
Organization: Commodore, West Chester, PA
Lines: 15

In article <3...@wrdis01.af.mil> wdiet...@wrdis01.af.mil (Dieterich) writes:
>What is the max. banwidth(data transfer rate) of Zorro II and Zorro III?

Zorro II goes about 3.5 Megabytes/second (MB/s).  Zorro III has a theoretical
limit of about 50 MB/s using full cycles, or 150 MB/s using multiple transfer 
cycles within full cycles (eg, "burst).  The A3000's Zorro III implementation 
has a practical limit of about 20 MB/s without burst.  You would really need
a microprocessor that "spoke" Zorro III as its native bus interface to get 
close to the theoretical limits for the bus master half of the transaction,
though its not all that difficult to make a memory slave device that closely
matches the ideal Zorro III cycle.  
-- 
Dave Haynie Commodore-Amiga (Amiga 3000) "The Crew That Never Rests"
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	"What works for me might work for you"	-Jimmy Buffett