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- Newsgroups: comp.sys.sgi
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- From: olson@anchor.esd.sgi.com (Dave Olson)
- Subject: Re: Memory upgrades for R4000 Indigos
- Message-ID: <nkf58q4@zuni.esd.sgi.com>
- Sender: news@zuni.esd.sgi.com (Net News)
- Organization: Silicon Graphics, Inc. Mountain View, CA
- References: <1992Jul17.204254.6599@microunity.com> <1992Jul21.004035.27345@donau.et.tudelft.nl> <1992Jul21.064111.1619@microunity.com> <1992Jul22.160210.9849@eagle.lerc.nasa.gov>
- Date: Wed, 22 Jul 92 19:11:13 GMT
- Lines: 25
-
- In <1992Jul22.160210.9849@eagle.lerc.nasa.gov> steve@pitacat.lerc.nasa.gov (Steven H. Izen) writes:
-
- | In article <1992Jul21.064111.1619@microunity.com>, jsw@microunity.com (Jeff Weinstein) writes:
- |
- | > Actually neither is true. The main problem with the r3k indigo was that
- | > there just wasn't room on the CPU board to put the chips that did the
- | > memory interleaving/control, so they had to go on the back of the simms.
- | > It was definitely not a conspiracy on the part of SGI marketing to squeeze
- | > more money out of customers. The engineers sincerely felt bad to have
- | > to make that sort of engineering trade-off, and vowed never to do it
- | > again. They have lived up to it in the new r4k indigo.
- |
- | This all makes sense for the inidgo, but does the same argument apply to the 4D/35 as well?
-
- Of course. The 30, 35, and Indigo are essentially identical
- architectures. They happen to have different board layouts,
- and a few different features, but the same kernel will run on
- both (assuming you link the right graphics drivers). Given
- that the architectures were identical, we really needed to keep
- the memory subsystem the same also; at least if we wanted to ship
- them both in a reasonable time frame.
- --
- Let no one tell me that silence gives consent, | Dave Olson
- because whoever is silent dissents. | Silicon Graphics, Inc.
- Maria Isabel Barreno | olson@sgi.com
-