I'm trying to run netbsd-current (binary tree) on my sun 4/260
I'm having the same problem cddukes back in port-sparc0086 0087
The machine panic's during boot of GENERIC_SCSI kernel the same way that 
cddukes did.
The only thing i can think of is the machine is totally diskless and its 
trying to find some scsi disks that arent there and crashing.
Maybe all i need is a nfs only kernel.