Kin C. Yu

Process and apparatus employing microprogrammed control commands for transferring information between a control processor and communications channels

Communication multiplexer having dual microprocessors

Communication line service interrupt technique for a communications processing system

Communication multiplexer using a random access memory for storing an acknowledge response to an input/output command from a central processor

Multi-way vectored interrupt capability

Communication multiplexer sharing a free running timer among multiple communication lines

Computer system having a paging apparatus for mapping virtual addresses to real addresses for a memory of a multiline communications controller

I/O data processing system

Hardware in a computer system for maintenance by a remote computer system

Bus interface in communication controller