Design of a high reliability self diagnosing computer using bit slice microprocessors

This paper describes a processor built to meet the requirements for a highly reliable and ruggedised digital computer. Innovative techniques were used to achieve high performance without using very high reliability components or redundancy at the circuit level. The processor therefore was designed using moderately reliable components (mil B standard) with microprogrammed control logic and powerful built-in microdiagnostic capabilities. It was successfully used for two major applications: a digital switching system and a data acquisition and processing system for a weather radar