>
> Great!  Any idea how NetBSD 3 and `current' deal with it?
>
>   
NetBSD 3.0.1 (GENERIC.MP) #0: Tue Aug 15 17:04:36 CEST 2006
        doomwarrior@sparky:/usr/src/sys/arch/sparc/compile/GENERIC.MP
total memory = 511 MB
avail memory = 495 MB
bootpath: 
/iommu@f,e0000000/sbus@f,e0001000/espdma@f,400000/esp@f,800000/sd@3,0
mainbus0 (root): SUNW,SPARCstation-20: hostid xxxxxxxx
cpu0 at mainbus0: mid 8: RT620/625 @ 180 MHz, on-chip FPU
cpu0: 512K byte write-back, 32 bytes/line, sw flush: cache enabled
cpu1 at mainbus0: mid 10: RT620/625 @ 180 MHz, on-chip FPU
cpu1: 512K byte write-back, 32 bytes/line, sw flush: cache enabled

Best Regards
Stephan