I have made my NetBSD 1.2 / i386 system crash a few times by connecting
an external device to a com port while the machine was running.  I don't
know what it is that causes the crash, but I get

fatal page fault in supervisor mode
trap type 6 code 0 eip f81b74fb cs 8 eflags 10202 cr2 70 cpl e000ce5a
panic: trap
syncing disks... fatal page fault in supervisor mode
trap type 6 code 0 eip f81268e0 cs 8 eflags 10282 cr2 18 cpl 0
panic: trap

f81268e0 is inside _bdwrite, f81b74fb is in _comintr.

Any ideas?  I will install 1.3 on this machine ASAP, but this is a production
machine and I am in trouble if I run into new problems with 1.3... ;)

  -jm