Data processing system with direct device-to-device data...

Details Data processing system with direct device-to-device data... Data processing system with direct device-to-device data...

H - Electricity

04

L

354/232

H04L 5/20 (2006.01) H04L 5/14 (2006.01)

Patent

CA 1153122

ABSTRACT Under the I/O protocol required by conventional computer architectures, peripheral devices communicate with each other via the CPU of a host computer. That requirement necessitates two separate data transfers and cuts the data transfer rate by one-half. This invention discloses a data processing system having an architecture that will allow high-speed direct device-to-device data transfers independently of a computer memory. The system consists of a host computer interconnected with a remote signal processing subsystem. A Direct Device Access Bus and a plurality of data processing devices are provided. The supervisor includes means for subdividing the plurality of devices into several device sets by assigning a unique transaction code to the members of each set, a different code being used for each different set. A controller associated with a Signal Processing Subsystem supervisor, selectively interconnects desired ones of a set of data processing devices via the Direct Device Access Bus to provide direct communication between the selected devices of each of several device sets on a substantially concurrent basis.

360074

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