Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!batcomputer!caen!sdd.hp.com!spool.mu.edu!uunet!cbmvax!daveh From: daveh@cbmvax.commodore.com (Dave Haynie) Newsgroups: comp.unix.amiga Subject: Re: Benchmarks and other nonsense Message-ID: <21404@cbmvax.commodore.com> Date: 8 May 91 20:35:29 GMT Article-I.D.: cbmvax.21404 References: Reply-To: daveh@cbmvax.commodore.com (Dave Haynie) Distribution: usa Organization: Commodore, West Chester, PA Lines: 22 In article tzeng@sunland.gsfc.nasa.gov (Nigel Tzeng) writes: >Hi! >If someone could also give me a quick rundown on the max data rate the >Zorro bus can support it would be a big help. We write ground systems >for NASA so being able to gobble (and display) data at a fast rate is >a real plus. At the moment the max downlink rate is 900Kbits...which >means that we need roughly double that. The Zorro II bus runs at roughly 3.5 Megabytes/second. The Zorro III bus interface to the A3000 peaks at about 20 Megabytes/second. So even using some kind of programmed I/O device on the Zorro III bus, you can get around 10 Megabytes/second throughput, which is about 45 times more bandwidth than you apparently need. Most good I/O devices do some local buffering to keep down the interrupt overhead. >Nigel Tzeng - STX - SMEX Project -- Dave Haynie Commodore-Amiga (Amiga 3000) "The Crew That Never Rests" {uunet|pyramid|rutgers}!cbmvax!daveh PLINK: hazy BIX: hazy "That's me in the corner, that's me in the spotlight" -R.E.M.