Hi,

I've found with my PB500s that I MUST unplug the 10baseT
connection while booting.  Otherwise it's quite common
for me to trap.  Once booted everything is fine.

Note that in my case this is my hand built softfloat 
systems so this may be completely unrelated to your bug
:-)

cheers

bruce

Riccardo Mottola <zuse@libero.it> wrote:
> Hello to all,
> 
>     it came the moment... to upgrade my quadra 610 to 1.6, after it was
> running 1.5ZA quite fine.
>     I used sysinst over the existing partition so it was a clean install,
> not an upgrade. The installer booted fine and installed everything. I halted
> the machine regularly.
> I have installed the GENERIC kernel and all the rest.
> I reboot, use tthe same settings as the old booter (except using
> 2.0-something) and start a new boot. I leave the quadra unattended, after
> some minutes i get a white screen. No keyboard response, only the NMI switch
> gets a debugger, no usable keyboarrd. SO I reboot and watch closely the
> screen. It seems to boot, HW parameters like RAM seem correctly recognized.
> it comes up to the file-system and them launches  an MMU trap after an
> uvw_fault().
> At the third attempt it finally booted to a prompt!
> 
> A new attempt.. blank screen. This happens right after the last message on
> the mac side ("so i sez him...")
> 
> -ric