How to find why the system reset?

hi,

may be caused by a buggy code somewhre, a system we developed under
M16C microprocessor will reset itself in some cases. i want to find
out what's the cause of the reset ( the hardware watchdog was turned
off ). is there any idea about this kind of problem? and, could you
please introduce any method used to detect causes of system reset?

thanks in advance.

-
narke

.

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