"Paul Rubin" <http://[EMAIL PROTECTED]> Wrote:
| "H J van Rooyen" <[EMAIL PROTECTED]> writes: | > So on a processor that does not have protected instructions - if an | > idiot writes something to the following effect : | > | > *instructions to disable interrupts* | > | > followed by : | > | > *instructions that go into an infinite loop AND that make no OS calls* | > | > the whole bang shoot stops dead - Reset your machine... | | A common recovery mechanism in embedded systems is a watchdog timer, | which is a hardware device that must be poked by the software every | so often (e.g. by writing to some register). If too long an interval | goes by without a poke, the WDT hard-resets the cpu. Normally the | software would poke the WDT from its normal periodic timing routine. | A loop like you describe would stop the timing routine from running, | eventually resulting in a reset. *grin* - Yes of course - if the WDT was enabled - its something that I have not seen on PC's yet... - Hendrik -- http://mail.python.org/mailman/listinfo/python-list
