Apparatus and method for coordinating activities of one or more computers
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United States of America Patent
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Jul 24, 2007
Grant Date -
N/A
app pub date -
Oct 11, 2001
filing date -
Oct 11, 2000
priority date (Note) -
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Abstract
A method and apparatus for coordinating the activities of multiple computers using a common reference point such as a Global Positioning System pulse-per-second signal. A reload register transmits a reload value to a mission timer. The mission timer generates an interrupt signal based upon the reload value. A timer capture register captures the countdown value of the mission timer when a pulse-per-second signal is asserted. Software generates new reload values based upon the countdown value captured by the timer capture register. Additional timer capture registers may be used to form a consensus value of the countdown value when the pulse-per-second signal is asserted. A local pulse-per-second signal generator may be used when a Global Positioning System pulse-per-second signal is not available.
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