Article View: comp.arch
Article #21577Re: DMA on RISC-based systems
From: Snoopy
Date: Mon, 05 Jun 1989 00:46
Date: Mon, 05 Jun 1989 00:46
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1548 bytes
In article <2819@scolex.sco.COM> seanf@scolex.UUCP (Sean Fagan) writes:
|For those of you who haven't guessed, the machine was the CDC Cyber,
|designed (chiefly) by Seymour Cray (God). The machine I played on mostly
|was a Cyber 170/760, which was estimated at about 10 MIPS or so, and could
|support hundreds of people, all doing "real" work (database, editing,
|compiling, etc.). As I, and others, keep trying to say, MIPS are fine, but
|can it do I/O?
I remember an 11/70 doing 1/3 the number of jobs of a pair of CDC 6500s.
It supported ~50 users with *very* fast response, faster baud rate terminals
(19.2k vs 300/1200), upper/lower case vs. the 6500's upper-case only, and
of course Unix. To this day, I haven't used a machine with multi-user
response that's even close.
It's not what you have, it's what you do with it.
_____ .-----.
/_____\ Snoopy ./ RIP \.
/_______\ qiclab!sopwith!snoopy | |
|___| parsely!sopwith!snoopy | tekecs |
|___| sun!nosun!illian!sopwith!snoopy |_________|
"I *was* the next man!" -Indy
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!apple!ames!pacbell!ditka!qiclab!sopwith!snoopy From: snoopy@sopwith.UUCP (Snoopy) Newsgroups: comp.arch Subject: Re: DMA on RISC-based systems Message-ID: <215@sopwith.UUCP> Date: 5 Jun 89 00:46:35 GMT References: <46500067@uxe.cso.uiuc.edu> <28200325@mcdurb> <2819@scolex.sco.COM> Reply-To: snoopy@sopwith.UUCP (Snoopy) Organization: The Daisy Hill Puppy Farm Lines: 24