Geotel Communications Corp.

Honeywell Information Systems Inc.

Steven H Webber

Lawrence E Johnson

James P Kelly

Vincent J Milano, Jr

Jerry A Stern

G Wayne Andrews

Charles R Davis

Ronald E Lange

Riley H Dobberstein

A communications system and method for automatically making telephone routing decisions with 'global authority' based upon information gathered in real time from the entire communications system and global optimization criteria. The present invention permits unified central control and management for the entire system.

Communications system and method for operating same

Communications system using a central controller to control at least one

In a data processing system that uses segmentation and paging to access data information such as in a virtual memory machine, the cache store need not be entirely cleared each time an I/O operation is performed or each time the data in the cache has a possibility of being incorrect. With segmentation and paging, only a portion of the cache store need be cleared when a new page is obtained from the virtual memory. The entire cache store is cleared only when a new segment is indicated by the instruction. The cache store is selectively cleared of the information from the page whose data information is no longer needed by addressing each level of an associative tag directory to the cache store. The columns of each level are compared to the page address and if a comparison is signaled that column of the addressed level is cleared by clearing the flag indicating the full status of the column in the addressed level. Each level of the tag directory is addressed.

Apparatus for selectively clearing a cache store in a processor having

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Groton, MA, United States of America

Steven H Webber