Hi.

>>> 'clock0 at mainbus0' is presumably for a different machine which
>>> attaches the clock in a different way.
>> 
>> The description "clock0 at mainbus0" is for DS3100, not for
>> DS5000/200.  The confusing point is kernel requires clock has to be
>> configured with IOASIC for DS5000/200 as if it has the circuit.
>
> Hmm, so that means that the DS5000_200 kernel config file that comes with
> the kernel source is wrong?

You uncovered the bug.  Kernels with DS5000_200 only configuration can
not boot at all.  Send PR (it's handy to use http://www.netbsd.org
"Reporting a Bug" page) describing it as serious or critical.

Tohru Nishimura
Nara Institute of Science and Technology