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A data processing system having an architecture that will allow high-speed direct device-to-device data transfers without the necessity of first detouring the data through a computer memory. The system consists of a host computer and a remote signal processing subsystem connected thereto. A Direct D

A data processing system having an architecture that will allow high-speed direct device-to-device data transfers without the necessity of first detouring the data through a computer memory. The system consists of a host computer and a remote signal processing subsystem connected thereto. A Direct Device Access Bus and a plurality of data processing devices are provided. 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 within a set. Several sets of devices can be serviced concurrently by the technique of dynamic time slot allocation.

대표청구항 ▼

A data processing subsystem associated with a host computer, said host computer including means for assigning processing tasks to said data processing subsystem by generating a queue of transaction command packets, comprising: a supervisor for receiving from said host computer transaction command pa

A data processing subsystem associated with a host computer, said host computer including means for assigning processing tasks to said data processing subsystem by generating a queue of transaction command packets, comprising: a supervisor for receiving from said host computer transaction command packets, said transaction command packets consisting of a plurality of supervisor command packets, selected in accordance with separate assigned processing tasks to be performed, into a plurality of device command packets; a plurality of peripheral devices characterized by different personalities but having equal priority; a direct device access bus, including a set of data lines for providing data pathways directly between said peripheral devices for parallel transfer of data, and including a set of command lines; a command control bus coupled to said supervisor; a plurality of programmable general purpose device adapters for respectively interfacing each said peripheral device in parallel, with the data lines of said direct device access bus; a decoder associated with each said programmable general purpose device adapter, each said decoder being coupled in parallel to said direct device access bus command lines; a register means in each said programmable general purpose device adapter, interconnected with the associated decoder and coupled to said command control bus, for receiving device command packets from said supervisor over said command control bus, the device command packets having been selected by said supervisor according to a process task to be performed by selected interfaced peripheral devices, the device command packets including a unique transaction code for identifying a peripheral device as being a member of a particular one of several different sets of peripheral devices, a separate transaction code being assigned to each different peripheral device set and the same transaction code being assigned to all of the members within a particular set; a bus controller interconnected between said supervisor and the command lines of said direct device access bus; means, in said bus controller, responsive to commands from said supervisor, for applying, at overlapped timed intervals, respective transaction codes to the decoders over the command lines of said direct device access bus so that, when a transaction code is received by the decoders that are associated with the programmable general purpose device adapters which are interfaced with members of the respective peripheral device sets, matches the transaction code received by the corresponding register means over the command control bus, data pathways are enabled by the programmable general purpose device adapters, over the data lines of said direct device access bus between individual members of the respective peripheral device sets to allow substantially concurrent, direct, parallel data-transfers therebetween as required for the performance of the separate assigned processing tasks, independently of the host computer.