The 3B20D Processor & DMERT Operating System: Overview and Architecture of the 3B20D Processor
Wing N. Toy, L. E. Gallaher · Bell System Technical Journal · 1983
The 3B20D Processor is designed to meet a broad range of telecommunication applications. New features such as memory management are incorporated into its design to support a modern operating system. Hardware supports are provided to efficiently execute a high-level language. A major design objective is to meet the stringent reliability requirements of electronic switching systems. The proven technique of self-checking duplex operation forms the basic architecture structure of the 3B20D Processor.