Problems booting sparc64 v240

[Chris Ross <cross+netbsd%distal.com@localhost>]

I built a -current from today, and when I tried to boot it from a CD on my 
SunFire v240, it didn't make it to multi-user.  I don't think it even made it 
to single-user.

 I see:

root on cd0a dumps on cd0b
root file system type: cd9660
warning: no /dev/console
aceride0:0:0: lost interrupt
        type: atapi tc_bcount: 8192 tc_skip: 0
aceride0:0:0: bus-master DMA error: missing interrupt, status=0x21
cd0: transfer error, downgrading to Ultra-DMA mode 1
trap: pid=1.1 comm=init textfault at 40900004!! sending SIGILL due to trap 16: 
illegal instruction
Process (pid 1) got sig 4
trap: pid=1.1 comm=init textfault at 40900004!! sending SIGILL due to trap 16: 
illegal instruction
Process (pid 1) got sig 4
trap: pid=1.1 comm=init textfault at 40900004!! sending SIGILL due to trap 16: 
illegal instruction
Process (pid 1) got sig 4


and those traps repeat forever.  Any suggestions as to what is wrong, or what 
needs to be modified to get this system online, at least principally?

  Thanks...

            - Chris