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- Newsgroups: comp.arch
- Path: sparky!uunet!rde!ksmith!keith
- From: keith@ksmith.uucp (Keith Smith)
- Subject: Re: COMPAQ PROPOSED SCALABLE I/O ARCHITECTURE
- Organization: Keith's Computer, Hope Mills, NC
- Date: Tue, 22 Dec 92 15:35:19 GMT
- Message-ID: <1992Dec22.153519.8512@ksmith.uucp>
- Keywords: I/O, Point-to-Point, High Performance, Low Cost, Bus
- References: <1992Dec16.205908.4826@dvorak.amd.com> <1992Dec20.212105.13649@ksmith.uucp> <id.IO0W.TLE@ferranti.com>
- Lines: 49
-
- In article <id.IO0W.TLE@ferranti.com> peter@ferranti.com (peter da silva) writes:
- >I've seen two versions of this: one successful, one less so. The Convergent
- >Technology bookshelf unit is a very nice design, with a positive mechanical
- >lock and no arbitrary limits to the bus length. The Amiga expansion port is
- >less successful, because it has no lock and the signal definition was never
- >designed for multiple piggybacks. The original Amiga design would have been
- >much better: basically stacked units with a bus running vertically up the
- >back of the stack, using gravity for locking. It was abandoned because it
- >would have added a several dollars to the cost of manufacturing a $1500 PC.
-
- A modular block design is going to be slightly more expensive due to
- case/connection cost. I'd like to see the Convergent box sometime.
- I've never encountered one before. Is the BUS architecture closed?
-
- But imagine if it was standardized. You could buy a pre-fab block with
- standardized mounting points for a circuit board and connectors, and
- plug a project board into it. Drive goes out, snap it off, and snap
- another on. This of course would require that:
-
- >I'd like to see the bus specifics decoupled from the software, so you had
- >some sort of interface that you told "go to unit so-and-so and send this
- >control/read this data". Then you could use a low-cost hookup with ethernet
- >type cables, or a high-speed bus type option, without impacting the software.
- >You could even plug a low-speed adaptor into a high speed bus to hook up
- >your laptop when you get home.
- >
- >If course this would logically be a LAN (um, CAN: Computer Area Network?).
-
- Yes, exactly. You could even make the thing somehow know how far off it
- is, like contact the device 3 hops from the mother block, etc. The
- ethernet idea of unique Umpteen bit addresses somehow scares me.
- Perhaps use one decoupled bus pin, as a serial address marker that is
- gobbled, incremented and passed down to the next device on the same pin,
- sent every second or so until a block is connected and acks the address,
- which would then pick up it's address, increment it ...
-
- >> <SIGH> not in my lifetime I suppose.
- >
- >Go get a Burroughs/CT bookcase unit. UHaul uses them here in Houston, or
- >call your local Unisys rep.
- ^^^^^
- Hehehehe :) :)!
-
-
- I'm sure It's not an expensive box :) :)!
- --
- Keith Smith uunet!ksmith!keith 5719 Archer Rd.
- Digital Designs BBS 1-919-423-4216 Hope Mills, NC 28348-2201
- Somewhere in the Styx of North Carolina ...
-