G - Physics – 06 – F
Patent
G - Physics
06
F
340/82
G06F 15/16 (2006.01) G06F 13/12 (2006.01) G06F 15/17 (2006.01)
Patent
CA 1256528
Abstract of the Disclosure Disclosed is a communication system between computer systems of the type in which first and the second computer subsystems operate under the control of an independent or a common operating system. The sender subsystem has n sender buffers while the receiver subsystem has m receiving buffers on the respective main stores. The sender subsystem has the sending suffer address table having n entries while the receiver subsystem has the receiving buffer address table having m entries on said respective main stores. Each of the entries contains the header address information of corresponding the sending and receiving buffers and the length information or the final address information of the relevant buffer. The sender subsystem has the buffer control block including the header address of sending buffer address table, number of entries of the table, enqueu pointer which indicates a buffer address being stored in the table and to be enqueued next and dequeu pointer which indicates a buffer address being stored in the table and to be dequeued next on the main store or register of the relevant sender subsystem. The receiver subsystem has the buffer control block including the header address of receiving buffer address table, number of entries of the table, enqueu pointer which indicates a buffer address being stored in the table and to be enqueued next and dequeu pointer which indicates a buffer address being stored in the table and to be dequeued next on the main store or register of the relevant receiver subsystem, and communication paths are provided for transferring data stored in the sending buffers of the sender subsystem to the receiving buffers of the corresponding receiver subsystem. According to the invention highly efficient data transfer is achieved, interruptions for inter-subsystem communication are minimized and the degradation of efficiency and increase of hardware over long physical distances is minimized.
364506
Hiraoka Kaoru
Kaneda Saburo
Miyazawa Tatsushi
Sanagi Mitsura
Shimada Toshio
Fetherstonhaugh & Co.
Fujitsu Limited
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