Okay, the answer to my problem (which was dropping to the kernel debugger
w/o keyboard support while the kernel was loading) was "disable the
'serial boot echo' checkbox in the Mac68k booter application".

So now my powerbook boots NetBSD.  It's slow, but it's nifty.

I ran into some bugs:

NetBSD-1.5 is configured to run getty on /dev/ttyE0 which is a wscons
device.  When the system boots, /dev/ttyE* doesn't exist (the installer
makedev step doesn't create it), so you don't get a console if you boot
multi-user.

-- Lars

-- 
Lars Kellogg-Stedman <lars@larsshack.org>