Motorola Corporation

Kenneth J Clauss

Louis A McRoberts

Keith Morton

A multi-purpose direct memory access packet control system for moving packets within a multi-processor computer system. The data memory is allocated into a number of unique data spaces suitable for storage of packets. Each data space is controlled by a unique type of buffer manager. Different buffer formats such as circular, linear, and offset are provided without the intervention of the processor and its associate software. Data packets are rapidly transmitted from an input buffer to the appropriate section of the memory and vice versa.

Data packet switching system having DMA controller, service arbiter,

A method and apparatus for switching data between a selected pair of data processing elements. The method involves steps of sending a first service request signal from a first data processing element to a switch, where the first service request signal includes a first destination, sending a first data message to the switch and storing the first service request signal and the first data message at least temporarily in a first buffer memory. The method further involves steps of routing the first data message to the first destination and initiating communication between the first data processing element and the first destination.

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Chandler, AZ, United States of America

Kenneth J Clauss