Information processing system capable of quickly detecting...

Details Information processing system capable of quickly detecting... Information processing system capable of quickly detecting...

G - Physics

06

F

354/230.83

G06F 9/46 (2006.01) G06F 15/16 (2006.01)

Patent

CA 1317681

Abstract of the Disclosure: In an information processing system comprising a main memory device, a plurality of processors, a system controller between the main memory device and the processors, and an extended buffer memory for carrying out a data transfer operation to and from the main memory device, the system controller comprises a communication lock circuit for selectively indicating a locked state and an unlocked state representative of a state of the extended buffer memory. The communication lock circuit is accessed to detect the state of the extended buffer memory each time when either a lock instruction or a lock release instruction is issued from each processor before a data transfer request is delivered from each processor to the extended buffer memory.

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