Guidedog is using the Hammer CPU board from manao:
   cpu0: FMI,MB86904 (mid 0 impl 0x0 ver 0x4 clock 110 MHz)
   mem = 65536K (0x4000000)
   Ethernet address = 0:80:b6:7:1b:58
   root nexus = THEMIS,564

It's disk is the old guidedog disk, connect to the CPU board via the SBUS
  SCSI interface (see 68pin black scsi cable on the picture).
  Disk is: SEAGATE-ST318275LW on c1t0d0.

I need to put a local sun keyboard & monitor so I can do a STOP-A:
The OBP is still setup for hammmer (autoboot on c0t?d0), to here how we
boot from a reset:
   boot /iommu@0,10000000/sbus@0,10001000/SUNW,fas@0,8800000/sd@0,0


Solaris format command shows:
   0. c1t0d0 
   /iommu@0,10000000/sbus@0,10001000/SUNW,fas@0,8800000/sd@0,0

df -k shows:
   Filesystem             kbytes    used     avail capacity  Mounted on
   /dev/dsk/c1t0d0s0      192223   49551    123450    29%    /
   /dev/dsk/c1t0d0s6      480463  389102     43315    90%    /usr
   /proc                       0       0         0     0%    /proc
   fd                          0       0         0     0%    /dev/fd
   /dev/dsk/c1t0d0s7      962543  415674    489117    46%    /aux
   /dev/dsk/c1t0d0s4    15529739  241654  15132788     2%    /aux1
   swap                   238648     216    238432     1%    /tmp