Data processing with stages operated to different sequential phases - using programmed memory with access to provide operating status

摘要

A data processing system consists of a number of different processing stages that may be operated in a number of different sequential phases. Within each phase various stages of the system may be operated with different instruction sets. The system is analogous to an oil-pipeline with various control stages along its length. A main memory provides both programme instructions and operands. A section of the store is assigned as a stack memory. The first stage of the processing unit is a programme counter coupled to an instruction unit. The main memory is coupled to a fast access auxiliary store operating into the instruction register. A stack access unit operates in conjunction with a second auxiliary memory.