On Fri, Nov 17, 2000 at 11:26:02AM -0700, Warner Losh wrote:
> In message <[EMAIL PROTECTED]> Sheldon Hearn writes:
> : The problem with a hard lock-up out of which you can't escape into the
> : debugger is that it makes meaningful bug reports impossible. My non-SMP
> : workstation has exhibited apparently arbitrary lock-ups since the advent
> : of SMPng.
>
> You can also short IOCHK to ground to get an NMI which kicks you into
> the debugger, even in an interrupt context. I have a card I built
> from an old multi-function card to do this. I think it is A1 and A2,
> but I don't have my ISA bus spec handy.
Just stick a metal pin (ballpoint works well) into the ISA connector
between the pins closest to the back of the machine. That is IOCHKN and GND
respectively.
Wilko
[hardware designer gone bad..]
--
Wilko Bulte Arnhem, the Netherlands
[EMAIL PROTECTED] http://www.freebsd.org http://www.nlfug.nl
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