Sparc11 or 111?

How can I check the architecture version on a sun box?
So far I've tried;

arch -k which gives
sun4u

and uname -a which gives
SunOS <hostname> 5.8 Generic_108528-22 sun4u sparc SUNW,Ultra-4
but nothing which definitively states sparc11 or 111 - any ideas?

OK I found an executable (fpversion) which did the biz..

A SPARC-based CPU is available.
Kernel says CPU's clock rate is 480.0 MHz.
Kernel says main memory's clock rate is 96.0 MHz.

Sun-4 floating-point controller version 0 found.
An UltraSPARC chip is available.

Use "-xtarget=ultra2 -xcache=16/32/1:8192/64/1" code-generation option.

try this....:

solaris 8:

/usr/platform/sun4u/sbin/prtdiag

solaris 9:

/usr/sbin/prtdiag

greetings Pre�y