Well not unless you require RAM...
I just copied sunw/ultra40, adjusted superIO for serial output, and whacked a bunch of stuff that looked like it was for 2nd CPU (it's a UP board). Sure wish I knew what I was doing!
LinuxBIOS-2.0.0_ultra40_Fallback Wed Apr 11 21:26:06 EDT 2007 starting... Enabling routing table for node 00 done. Enabling UP settings Disabling read/write/fill probes for UP... done. coherent_ht_finalize done core0 started: started ap apicid: SBLink=00 NC node| link=00 ht reset -
LinuxBIOS-2.0.0_ultra40_Fallback Wed Apr 11 21:26:06 EDT 2007 starting... Enabling routing table for node 00 done. Enabling UP settings Disabling read/write/fill probes for UP... done. coherent_ht_finalize done core0 started: started ap apicid: SBLink=00 NC node| link=00 SMBus controller enabled Ram1.00 setting up CPU00 northbridge registers done. Ram2.00 No memory for this cpu Ram3 No memory