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- Newsgroups: comp.parallel
- Path: sparky!uunet!gatech!hubcap!fpst
- From: Damon <dhd@exnet.co.uk>
- Subject: Re: Basic Question
- Message-ID: <1992Aug17.140339.23091@hubcap.clemson.edu>
- Apparently-To: comp-parallel@uunet.uu.net
- Sender: fpst@hubcap.clemson.edu (Steve Stevenson)
- Organization: ExNet Systems Ltd Public Access News, London, UK
- References: <1992Aug14.121114.3814@hubcap.clemson.edu>
- Date: Mon, 17 Aug 1992 10:05:54 GMT
- Approved: parallel@hubcap.clemson.edu
- Lines: 45
-
- In article <1992Aug14.121114.3814@hubcap.clemson.edu> hacksaw@cellar.org (Hacksaw) writes:
- > I apologize if this message is off-topic or idiotic, but... I was talking
- >to a friend who mentioned something about parallel computing. The idea that
- >more than one processor could be hooked together in one system and achieve
- >"super-speed". At work, he used a system(I forget the name) that had
- >4-parallel 386/25Mhz processors. It handled "animation" on a CAD program
- >called Jack with no trouble at all. I'm talking high-res images getting
- >flipped back and forth in no time. If this is what 4 386 processors can
- >achieve, then I'll be satisfied with what 2 286 processors can do.
- >
- > I'm currently running a 286/12 under MS-DOS. Obviously, I'm ready to
- >upgrade. I can pick up another 286 motherboard for under $100. Or would I
- >just need the 286 chip itself? Anyway... how would I go about hooking these
- >things together to achieve parallelism? What kind of software would support
- >it? MS-DOS seems to choke on even the itty-bittiest section of RAM above
- >640K; I don't know what makes me think it could handle another processor.
- >
- > Basically... Is parallel computing something only for the highest end
- >machines, or could it be achieved on a measly 286? Any comments would be
- >greatly appreiated.
-
- No, parallelism will soon be for the masses! Technology is working its
- way down from supercomputers through workstations to (even B^>) the x86
- range. That's not to say that microprocessors haven't been borrowing
- supercomputing parallelism tricks like pipelining for years anyway...
- Apparently the Intel 586 will have some direct hardware support for
- multiprocessing in the easiest-to-understand form (shared memory). And
- the Sequent machines have been using 386/486 for years...
-
- The main problem with chips not designed for multiprocessing (IMHO) is
- that they don't believe the `no CPU is an island' philosophy, and so
- are not particularly well suited to talking to other CPUs. But there's
- no reason in principle why you shouldn't use two or more 286s, none at
- all. Indeed, I have this secret wish to build a parallel m/c out of
- Z80s... The main problem is the size of the virtual memory space if
- multiple processors are going to have to share it. This is somewhat
- more accute for the Z80 than the 286. B^>
-
- Damon
- --
- Damon Hart-Davis | Tel/Fax: +44 81 755 0077 |1.22|| ALL MAIL FREE.
- Internet: dhd@exnet.co.uk | Also: Damon@ed.ac.uk || US hotrod motor groups.
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