Excerpts from mail: 13-Dec-101 re: Ultra 30 almost working by eeh@netbsd.org 
> Here's a new improved patch to try:
The version of the patch with the conditional doesn't work on an Ultra 60.
bus_space_read_8(...) returns 0xfffff (yes, 5 f's not 6, not 8), which
causes the test not to fire.

if I

fe 1fe.0000.1a00 15 spacex!

before booting, the test does fire, so it appears the correct location
is being read. I don't know what this really means. For the moment, I'm
going to treat timeo > 0x1000 as invalid in my kernel, and just reset
it.