Kevin Oberman wrote:
Date: Sat, 25 Feb 2006 15:42:06 -0800
From: Colin Percival <[EMAIL PROTECTED]>
Kevin Oberman wrote:
cperciva 2006-02-25 04:55:39 UTC
Log:
Add frequency-voltage tables for Intel 778, 758, 773, 753, and 733J
processors.
Obtained from: Intel Datasheet 302189-008
Is this a new datasheet or did someone find it in some odd corner of
Intel land? I'll admit that I'm baffled as to why Intel seemed to keep
this information under wraps for so long.
Intel updates their datasheets from time to time -- the information for
these processors was added in a new version of an old datasheet. Intel
still hasn't released the frequency/voltage tables for their 7x0 series
processors or the formula used to compute them.
Ack! I was not paying nearly enough attention! Still no joy for my 760
CPU, then.
Thanks anyway. Hopefully some day it will be available. I still don't
understand why Intel would withhold this sort of information on an
out-of-date series of chips from those who would buy the chips! (Or, at
least system containing them.)
I'm not defending this, but I think I know what happened. The voltage
to VID translation table was probably only present in the BIOS Writer's
Guide. This is because in the past, most of the code to use it was in
the BIOS and the OS can control it via ACPI. Intel doesn't publish the
BIOS Writer's Guides. To release the info, they probably had to extract
just that table, get approval, etc. The table itself doesn't seem that
secret to me but I guess the bureaucracy could be the real problem.
--
Nate
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