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- Path: sparky!uunet!zaphod.mps.ohio-state.edu!cs.utexas.edu!wotan.compaq.com!twisto.eng.hou.compaq.com!croatia.eng.hou.compaq.com!simonich
- From: simonich@croatia.eng.hou.compaq.com (Chris Simonich)
- Subject: Re: COMPAQ PROPOSED SCALABLE I/O ARCHITECTURE
- Message-ID: <1992Dec17.190553.17417@twisto.eng.hou.compaq.com>
- Sender: news@twisto.eng.hou.compaq.com (Netnews Account)
- Organization: Compaq Computer Corp.
- References: <AJC.92Dec16112232@thendara.pa.dec.com> <1992Dec16.235011.17202@twisto.eng.hou.compaq.com> <1992Dec17.100528.62134@cc.usu.edu>
- Date: Thu, 17 Dec 1992 19:05:53 GMT
- Lines: 30
-
- In article <1992Dec17.100528.62134@cc.usu.edu> ivie@cc.usu.edu (CP/M lives!) writes:
- >In article <1992Dec16.235011.17202@twisto.eng.hou.compaq.com>, simonich@croatia.eng.hou.compaq.com (Chris Simonich) writes:
- >> Very well put. However, wouldn't it be MUCH cheaper if you used a byte wide
- >> interface instead of 32 bit wide interfaces? The same architecture with
- >> the Compaq Proposal saves a lot of pins on the control block.
- >> I don't know all that much about Tc, but I've been told that each channel
- >> requires about 60ish pins on the controller once data, control, and power/
- >> gnd pins are taken into account. The Compaq proposal requires 20ish pins
- >> per channel on the controller. One could save 120 pins on the controller
- >> for this case by using the Compaq Proposal rather than Tc. A 120 pin savings
- >> translates into a significant cost savings.
- >
- >Well, working for a small company that can't afford to run out and spin
- >ASICs for every design, I would much rather deal with a TURBOchannel that
- >can be managed with a few PALs and jellybeans than a lower pin-count bus
- >that requires an ASIC to unpack that packets.
- >--
- >
- >Roger Ivie "My God! That computer is full of Pentium!
- >ivie@cc.usu.edu It's a wonder that you haven't been turned
- > into mutants!"
-
- Uh, why do you assume an ASIC is required? Anyway, the intermediate nodes
- of the network may be used over and over in any new design. The only time
- you would have do design anything new is if you changed the system interface.
- --
- ======================================================
- Christopher Simonich simonich@twisto.compaq.com
- Compaq Computer Corp. [713] 374-1898
- ======================================================
-