I have to add a couple of notes on this from my experience.  I am running
a Sonnet 300 Mhz G3 in a PowerComputing PowerCenter 132.  Works fine, with
two caveats. (mercy.icompute.com - web server)

One, the OF has some properties that are picked up by the kernel to figure
out how fast the CPU is running, and it then uses that info to set up the
NetBSD clock(s).  ("timebase-frequency")  On my machine, this was wrong
(both pre and post upgrade card) and this caused the NetBSD time of
day clock to be off by about 3% (as I recall).  This was too much for
ntpd to tolerate and ntpd would refuse to try to adjust the clock.
I had to put some extra stuff
in the OF boot command to change the value of this property to get the
clock to run closely enough to correctly so that ntpd would work.

I'm not sure if the upgrade CPU card somehow brings new "timebase-frequency"
values along with the card, but when I put in the new card, it did not
fix this problem.  I had to re-calculate the "correct"
value so ntpd would work.

Second, the backside cache is not enabled by default.  If you want this,
you'll have to build your own kernel with some variables set.
I don't remember off hand what they were.

-dgl-

>To help me understand this better, then, netBSD does not need the "virtual
>firmware" that is required under macOS to run this card, and the powerlogix,
>and xlr8 cards. Newer tech used to install the firmware ROMS onto the
>upgrade card, but since at least two of you are running these cards
>successfully, it must not be needed.
>
>Thanks for the help,
>
>Samuel Rose
>
>"Facts do not cease to exist
>because they are ignored." - Aldous Huxley
>----- Original Message -----
>From: "Xavier HUMBERT" <xavier@xavhome.fr.eu.org>
>To: "samuel rose" <samuel.rose@voyager.net>; "NetBSD-ppc"
><port-macppc@netbsd.org>
>Sent: Tuesday, July 10, 2001 3:09 AM
>Subject: Re: Power Mac Upgrade Cards
>
>
>> In message <045601c108bc$31cb3780$580110ac@cube106>,
>> samuel rose wrote:
>>
>> >Can anyone please point me toward some documentation that shows which
>> >G3/G4 upgrades are supported under netBSD?
>>
>> Sonnet G4/400 works like a charm on my 8600.
>>
>> --
>> Xavier HUMBERT  -  Systemes et Reseaux     |     labo-info@injep.fr
>> INJEP                                      |     humbert@injep.fr
>>
>>
>>