How to dertimine processor type on a sun server

cat /dev/cpu/self/cpuid

Sparc is not manufactured for about 10 years.

Use the prtdiag command

Look for the "CPU implementation column"

I found the command that I was looking for it was  /usr/sbin/psrinfo -v
which returns the following info

Status of virtual processor 0 as of: 11/19/2007 10:41:59
  on-line since 01/28/2007 10:08:36.
  The sparcv9 processor operates at 1593 MHz,
        and has a sparcv9 floating point processor.
Status of virtual processor 1 as of: 11/19/2007 10:41:59
  on-line since 01/28/2007 10:08:12.
  The sparcv9 processor operates at 1593 MHz,
        and has a sparcv9 floating point processor.

Thanks for all of the good help!

Use isainfo command to check if your solaris system running on 64bit or 32bit. For more information do a man on isainfo. Note Solaris 7 onwards is running on 64bit.

To check if your solaris box running on 64bit . . .
# isainfo -vk

isainfo -v
64-bit sparcv9 applications
32-bit sparc applications
isainfo -b
64