As my hard disk is wd0 rather than sd0, am I right in thinking that
  /bandit/ohare/ata/ata-disk@0,0
is the device with /netbsd on it from the OF point of view?
devalias tells me that ata and ata-int are aliases for /bandit/ohare/ata, so
  boot ata/ata-disk@0,0
should work?
This gives me "can't LOAD from this device". Yet
  dev ata/ata-disk
  words
lists: load write read seek open close...
       ^^^^

BTW, I can't find doco on installboot... I did
cd /mnt/usr/mdec
cp ofwboot /mnt/boot
chmod 400 /mnt/boot
./installboot -v /boot /usr/mdec/bootxx /dev/rwd0a

Was that a good guess?

Cheers,

Patrick (macppc newbie :-) )