Dynamic bus reconfiguration logic

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395477, 395475, 395495, G06F 1314

Patent

active

057614555

ABSTRACT:
A parallel processing system is provided with a plurality of processors and a plurality of memories, and bus units with arbitration coupling the processors and memories. A bus unit provides a pathway between one processor and the bus unit's respective memory. Each bus unit arbitrates multiple simultaneous access requests for its respective memory and communicates its decisions to other bus units so that a memory access requiring multiple memories will only occur if all those memories are available. The coupling of processors to memories can change, dynamically, each bus cycle without the need for setup before the bus cycle either by pipelining or having unused bus cycles. In a specific embodiment, the memory access information is provided on high order address lines, where the processor logically accesses different memory address spaces to make different accesses, thereby sharing memory with other processors.

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