System management apparatus for a multiprocessor system

Abstract From the Canadian patent

A data processing unit includes a number of tightly coupled central subsystems, a number of peripheral subsystems, a main memory and a system management facility all coupled in common to a system bus. The system management unit has top priority on the system bus and includes centralized resources which provide apparatus for indicating the status of power and temperature booting the, subsystems, testing the subsystems timing central, subsystem functions, and allowing local and remote maintenance access to the subsystems. The system management facility receives commands from the central subsystem to read from and write into the timers as well as to read the status of the overall system. The …