Here's one of the au_iointr panics.

trap: address error (load or I-fetch) in kernel mode
status=0x2, cause=0x800410, epc=0x802d1898, vaddr=0xfc13
curlwp == NULL ksp=0xc007fe58
Stopped at      netbsd:au_iointr+0x120: lw      v1,16(s0)
db>
db>
db> bt
802d1830+68 (0,a0000000,800a0500,400) ra 80277920 sz 0
evbmips_iointr+10 (0,a0000000,800a0500,400) ra 10400074 sz 24
PC 0x10400074: not in kernel space
0+10400074 (0,a0000000,800a0500,400) ra 0 sz 0
User-level: curlwp NULL
db>

Note that once the system completes booting, it doesn't seem to have a
problem.  It is only during initial boot that I see this kind of
problem, and only if I interfere on the console.

-- 
Garrett D'Amore, Principal Software Engineer
Tadpole Computer / Computing Technologies Division,
General Dynamics C4 Systems
http://www.tadpolecomputer.com/
Phone: 951 325-2134  Fax: 951 325-2191