Network for variable priority data processor interrupt control - accommodates several programs peripheral and alarm interrupts with relative priorities resettable by software

摘要

A network controls the interrupt sequence of a multiple programmed data processor. It accommodates several programs, peripheral interrupts and alarm or failure interrupts. The relative priorities assigned to these interrupts can be reset at will by suitable software. Basically a central processor unit (4) has associated with it a number of sets of registers. These contain information about the present priority rating of the program and peripherals (2, 5) and any interrupts occuring (1), and also comprise a status change control set or registers (3), state registers (6), alarm registers (7), and interrupt storage registers (8).