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Path: sserve!manuel.anu.edu.au!munnari.oz.au!sgiblab!zaphod.mps.ohio-state.edu!cs.utexas.edu!asuvax!ncar!vexcel!copper!aspen.craycos.com!scott
From: scott@craycos.com (Scott Bolte)
Newsgroups: comp.unix.bsd
Subject: VLB or not to be. This is a 50MHz question
Message-ID: <1993Feb15.144456.6327@craycos.com>
Date: 15 Feb 93 14:44:56 GMT
Organization: Cray Computer Corporation
Lines: 54
VESA Local Bus system with a 486DX-50 cpu? The VESA spec only
allows for a 40MHz cpu. But time and again I see references to
Local Bus slots with a 50MHz cpu. So I have been wondering how
they do it.
+ I've read the articles posted to this newsgroup.
+ I've talked to local computer sales critters, both the clueless
and clueful.
+ I've talked to half a dozen mail order supply houses.
And I was still unclear about local bus... Then I exchanged
mail with Julian Elischer. He explained that with a DX-50 chip
the local bus will run at half speed.
Now that I have an explanation I'll still looking for empirical
evidence.
The gory details... I would like to get a 486DX-50 based ISA
system with two local bus slots. To start with, one of the
slots will have an Ultrastore SCSI-2 Bus Master controller. I
am hoping that the Ultrastor 34f is close enough to the 14f
that it will work with the 14f driver Julian made available
last month. Can anyone confirm or deny this?
Later, after many months of saving, I hope to buy a large, high
quality monitor and an S3 based 928 graphics card. (An Actix
card most likely; unless Amancio has come up with some other
blazingly fast X port. :-)
So in the short term I can verify whether or not the local bus
SCSI controller works. If it does, in spite of not conforming
to the true VESA spec, I would accept the system. But I am
concerned that months down the line, long after the
30-day-$$$-back-guarantee has expired, I'll find that the
graphics controller does not work.
If you have experience that you can share, either for or
against 50MHz VLB, I would love to hear from you.
Thanks,
Scott
___________________________________________________________________________
Scott Bolte scott@craycos.com +1 719 540 4186
Cray Computer Corporation, 1110 Bayfield Drive, Colorado Springs, CO 80906
As anyone here will tell you: I speak for myself.
*** Celebrate Diversity ***
--
___________________________________________________________________________
Scott Bolte scott@craycos.com +1 719 540 4186
Cray Computer Corporation, 1110 Bayfield Drive, Colorado Springs, CO 80906
As anyone here will tell you: I speak for myself.