I've been reading the thread beginning with:
http://mail-index.netbsd.org/port-hpcsh/2006/08/12/0000.html

I have the same boot problems with my 690 (UK model), i.e. without a 
serial console I get Exception Event Code = 40 and a reset. As a data 
point, I tried hpcboot build 13 referred to in:
http://mail-index.netbsd.org/port-hpcsh/2006/08/14/0000.html
It didn't work for me either.

I found my old Dayna PCMCIA network card, but when I insert it hangs after 
the first ne0 line:
hd64461pcmcia0 at hd64461if0
pcmcia0 at hd64461pcmcia0
ne0 at pcmcia0 function 0: <Dayna Communications, Inc., CommuniCard E, >

I've tried 3.1_RC1 and 4.99.1 kernels.

(using the ne0 card would be better than my wi0 as I can netboot without 
having to disable WEP, etc.)

-- 
Stephen