A processor communication register (PCR) contained within a multiprocessor cluster system provides enhanced processor communication. The PCR stores information that is useful in pipelined or parallel multi-processing. Each processor cluster has exclusive rights to store to a sector within the PCR and...http://www.google.com.au/patents/US7818364?utm_source=gb-gplus-sharePatent US7818364 - Method and data processing system for microprocessor communication in a cluster-based multi-processor system