[rescue] Netra 1100/1400 => 1105/1405?

[Greg A. Woods]

[ On Thursday, August 23, 2001 at 14:04:32 (-0700), James Lockwood wrote: ]
> Subject: Re: [rescue] Netra 1100/1400 => 1105/1405?
>
> No.  Check out the Blackbird vs Sabre vs Sapphire module specs, these are
> freely downloadable from Sun's microelectronics site.  Every UltraSparc
> based Sun out there (including the humble U5/U10) can vary its CPU core
> voltage(s) (except possibly the CP/T1, I'm not sure about that one).

OK -- I must admit I've never seen an actual UltraSPARC module in person
yet, (or even the inside of any such machine).  I was guessing they
didn't run at +5vdc but I wasn't sure if they varied radically enough to
require field adjustment when upgrading or whatever.

They're getting cheap enough on the used market though and I should
probably try to get my hands on a couple someday soon...

> It is what these lines are for.  The U60 ps can regulate core CPU voltage
> on one line from between 2.5V and 3.5V.  This is necessary to use a
> variety of CPU cores.

So they're logic lines just like the VID0-VID4 pins on an Intel Slot-1
connector?

I think that's infinitely smarter than putting the VRMs right on the
motherboard like PCs do (or as some older M-bus modules did too).

(of course it means you really do need a custom PS module too!  ;-)

-- 
							Greg A. Woods

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