Design of an operating system nucleus for real-time microcomputer applications

Microcomputer applications frequently necessitate the use of systems software to co-ordinate application tasks which share a single processor. Basic design decisions in the operating system nucleus determine system performance with regard to task time scheduling and event scheduling. The paper discusses the design and implementation of a real-time operating system nucleus which employs non-pre-emptive task scheduling. Three stages in the development of the design are described