Electrical computers and digital processing systems: virtual mac – Task management or control – Process scheduling
Reexamination Certificate
2006-12-26
2006-12-26
An, Meng-Al T. (Department: 2195)
Electrical computers and digital processing systems: virtual mac
Task management or control
Process scheduling
C712S225000, C712S228000, C712S229000, C714S011000
Reexamination Certificate
active
07155721
ABSTRACT:
An apparatus for communicating between lock step is incorporated on two or more processors operating in a lock step mode. Each of the processors includes processor logic to execute a code sequence, and an identical code sequence is executed by the processor logic. The apparatus further includes a processor-specific resource referenced by the code sequence. A multiplexer is coupled to the processor-specific resource, and is controlled to read data based on the identification. Coupled to the processors is a lock step logic block operable to read and compare the output of each of the processors. The lock step logic determines if operation of the processors is in a lock step mode or in an independent processor mode. Such determination may be made by the lock step logic turning off, for example.
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Search Report issued on Sep. 10, 2004 in counterpart foreign application in FR under application No. 0307662.
Petsinger Jeremy P.
Safford Kevin David
An Meng-Al T.
Hewlett--Packard Development Company, L.P.
To Jennifer N.
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