Re: Ross RT625 in SS20

[Gordon Zaft <gordonzaft%gmail.com@localhost>]

Thanks. This is an SS20 though not an SS10.

On Tue, Jan 10, 2017 at 1:01 PM, CLIFFORD HAIGHT <klemish%hotmail.com@localhost> wrote:

IME my single 100MHz Ross modules runs hotter than using two SM85s. Running four 166 CPUs sounds pretty scary   to me

Sent from my BlackBerry 10 smartphone.

From: Mike Spooner

Sent: Tuesday, January 10, 2017 11:05 AM

To: Romain Dolbeau

Reply To: Mike Spooner

Cc: Gordon Zaft; NetBSD port-sparc mailing list

Subject: RE: Re: Ross RT625 in SS20

That indeed has been my experience! Mind you, the 166MHz modules run very hot, so be careful if you have *two* of them in the SS10. They were orginally specified by Ross for the roomier and better-ventilated HyperStation systems.

A good de-dusting of the SS10 PSU vents etc before you start is a wise precaution.

-- Mike Spooner

--------- Original Message ---------
From: Romain Dolbeau
To: Gordon Zaft ,NetBSD port-sparc mailing list
Date: Tue Jan 10 18:22:43 GMT+00:00 2017
Subject: Re: Ross RT625 in SS20

2017-01-10 19:17 GMT+01:00 Gordon Zaft <gordonzaft%gmail.com@localhost>:
> My question is -- don't I need to have 2.25R and not 2.25?

<http://mbus.sunhelp.org/systems/sun/ss20.htm> says you need 2.25R
only for the 'D' version of the HyperSPARC.

<http://mbus.sunhelp.org/modules/index.htm#hyper> says the 'D' version
are all 180 MHz or higher.

I read this as, if your HyperSPARC are 166 MHz or lower, 2.25 should be enough.

Cordially,

--
Romain Dolbeau

--

Gordon Zaft
Province 35 Governor
Phi Mu Alpha Sinfonia Fraternity
gordonzaft%gmail.com@localhost