Warner Losh writes: In message <1998...@dingo.cdrom.com> Mike Smith writes: : Pull the machine apart, locate the NMI trace by following it off the : CPU, and install a switch in an appropriate place. You *may* find a : conveninent pad there already.

I'll have to give that a try. If I can find the pinouts and such for the chip.

Yoy! Is it not possible to set up some sort of watchdog timer instead?

watchdog() /* runs once a second */ { if (in_driver) { if (was_in_driver) panic(); was_in_driver = 1; } }

naughty_driver_routine() { in_driver = 1;

...the routine...

in_driver = was_in_driver = 0; }

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