If it is some help, here is what OpenBoot displays:

Probing CPU FMI,MB86907
512 KB Secondary Cache Present
IOCLK Setting = CPUCLK/2
SBUSCLK Setting = CPUCLK/8
Running in TurboSPARC Native Mode
{probing sbus cards, many lines, important information ahead}
ROM Rev, 2.15
putting patch to put cpu in  uSII mode
Snoop and IC-Snoop turned On

And this is where NetBSD boots ... and shows no information whatsoever
about the cache. If someone can help then please tell how to see if
this cache is used and not displayed or not used. If it is not used
then a large part of the CPU upgrade is not used at all.

Olev

> Ok, so why is 512KB of cache displayed on 170MHz SS5? Is there any way
> of finding out if NetBSD uses this cache on the 161MHz or not,
> OpenBoot says that 512KB of secondary cache is enabled.
> 
> Olev
>