CPU version register and a problem

[DocWilco]

As per request in the boot messages, here's an unknown CPU:

0x3e001624000507

prtdiag for my Sun-Blade-1500 identifies the CPU as:
SUNW,UltraSPARC-IIIi  (mask: 2.4   cache: 1MB  speed: 1062MHz)

Now for the problem. Actually two problems during installation of 
5.2.1-RELEASE.

1) Root filesystem needs to be given manually. No big problem, 
"ufs:/dev/md0" does the trick.
2) After the kernel has booted the system stops working after a short 
period of time. Even the prompt for a root filesystem will not respond 
if I wait too long. I know this is probably related to UltraSPARC III 
not being supported yet, but I'd like to help out. *grin*

Greetings,

    DocWilco