On Sat, 11 Jan 1997 10:57:12 -0500 
 Matt Ahrens <matt@callnet.com> wrote:

 > ok, if i hit cmd-poweron, then 'trace', it says:
 > _Debugger(c56a6,36d0,14df30,32be,0) + 6
 > _nmihand(0,ffffffff,0,0,0) + 22
 > _lev7intr(?)
 > _mi_switch(0,0,14b2f0,f9001000,2) + 12
 > _tsleep(ef3a4,4,9a3e6,0) + 176
 > _scheduler(6c02b00,18cd2,1a2c0,1a990,80020b8a) + 66
 > _main() + 49e
 > _main() + 49e

Well, you've got the right idea, sort of :-)

What we need is "trace" from when the panic happens.. Your stack trace
above happily shows the code used by CMD-poweron (lev7intr, nmihand :-)

So, next time the machine panics with "jump to zero", type trace... the
kernel should give you the "db>" prompt when the panic happens.

Jason R. Thorpe                                       thorpej@nas.nasa.gov
NASA Ames Research Center                               Home: 408.866.1912
NAS: M/S 258-6                                          Work: 415.604.0935
Moffett Field, CA 94035                                Pager: 415.428.6939