Honeywell Information Systems Inc.

Angelo D Kachemov

Gary J Goss

Kin C Yu

A data processing system includes a number of input/output devices coupled to a communication multiplexer by 1 synchronous communication line and a number of asynchronous communication lines. During the polling operation, receive communication lines have high priority and transmit communication lines have low priority. Apparatus in the polling logic gives the synchronous communication line in the receive mode first priority and the synchronous communication line in the transmit mode second priority.

Communication multiplexer having an apparatus for establishing a single

A data processing system includes a number of input/output devices coupled to a communication multiplexer which polls the devices in a predetermined order. Apparatus in the communication controller rearranges the polling order to provide highest priority to an input/output device in a receive mode that is currently operative and to give lowest priority to an input/output device in a transmit mode that has just completed its operation.

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Plattsburgh, NY, United States of America

Angelo D Kachemov