1
Patrick M Gannon, Michael Ignatowski, Matthew A Krygowski, Lishing Liu, Donald W Price, William K Rodiger, Gregory Salyer, Yee Ming Ting, Michael P Witt: Coherence control by data invalidation in selected processor caches without broadcasting to processor caches not having the data. International Business Machines Corporation, Bernard M Goldman, November 23, 1993: US05265232 (79 worldwide citation)

A coherence directory and its methods of operation are disclosed for private processor caches in a multiple processor system to control data coherence in the system. It provides cross-invalidate (XI) controls for the assignment of exclusive and public ownership to data units in the processor caches, ...


2
Donald W Price, Forrest A Reiley, William K Rodiger: Look-ahead priority arbitration system and method. International Business Machines Corporation, Floyd A Gonzalez, James E Murray, Robert L Troike, December 6, 1994: US05371893 (50 worldwide citation)

An improved arbitration system is disclosed for arbitrating signals at a plurality of input nodes to output nodes where each input node can access any output node. The system includes a FIFO (first-in-first-out) input queue for each node and means for arbitrating the top of each queue for providing ...


3
William K Rodiger, Jon E Thorson, Yee Ming Ting: N.times.M round robin order arbitrating switching matrix system. International Business Machines Corporation, Robert L Troike, George E Clark, February 5, 1991: US04991084 (16 worldwide citation)

An N.times.M matrix adapted to couple N inputs from N processor to M basic storage modules is disclosed. The system includes arbitrators and gating means for each output responsive to request signals for simultaneously coupling data from a plurality of processors to requested basic storage modules u ...