The SDS SIGMA 7: a real-time time-sharing computer

Abstract

The SDS SIGMA 7 Computer system (Fig. 1) is unique among new computer designs in that it is the only system which has seriously considered and solved the problem of achieving true real-time response hardware and software capability while operating in a multiprogramming, multiprocessing, space-sharing, and time-sharing environment. This paper presents an overview of the system's architecture and describes in some detail those of its features which provide its unique capabilities.