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Command Execution Performance Enhancement Disclosure Number: IPCOM000038556D
Original Publication Date: 1987-Feb-01
Included in the Prior Art Database: 2005-Jan-31

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Freeman, WA Solie, DW Vossman, RA [+details]


A method is described to permit a dual-port communications card to execute commands for one of the ports without reducing the performance of the opposite port. A dual-port communications adapter presents performance problems not encountered in a single-port environment. The IBM RT PC Multi- Protocol Communications Adapter uses an on-card microprocessor to off- load the system processor of most low level tasks. This microprocessor-based design provides wide flexibility in the type of tasks that can be done by the adapter but also increases the performance requirements placed on the microprocessor in servicing both ports simultaneously. The new method provides a method for the microprocessor to execute commands for one of the communication ports without reducing the performance capabilities of the opposite port.