A multiprocessor computer system has a multiplicity of sub-systems and a main memory coupled to a system controller. Some of the sub-systems are data processors, each having a respective cache memory that stores multiple blocks of data and a respective set of master cache tags (Etags), including one...http://www.google.de/patents/US5905998?utm_source=gb-gplus-sharePatent US5905998 - Transaction activation processor for controlling memory transaction processing in a packet switched cache coherent multiprocessor system
