The phenomena listed by Drew are - of course - real (even if I disagree with the "software" label).
Dare I suggest that some on this list might like to look at some of the features of a modern microcontroller, such as a device from the TMS570 family? These have been designed to address many of the issues that have been raised here in the last couple of days.
Michael.
Michael J. Pont
SafeTTy Systems Ltd.
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