Device for concurrent limit validity check

Details Device for concurrent limit validity check Device for concurrent limit validity check

2006-06-05

2009-12-15

Tsai, Henry W. H. (Department: 2184)

Electrical computers and digital data processing systems: input/

Input/output data processing

Input/output addressing

C710S005000, C710S316000

Reexamination Certificate

active

07634586

ABSTRACT:
A device and method are disclosed for performing a limit address check validation in a switching device. The device includes a multiplexer that is enabled to select content from a base address register in an array of base address registers, a comparator enabled compare a base address in the content with a target address from a packet, and a comparator enabled to concurrently compare a limit address in the content with the target address and the output of the limit address comparator. The method includes receiving the target address, locating a matching base address in an array of base address registers, concurrently comparing the target address with a limit address associated with the matching base address, and indicating if said target address is not valid.

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