The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 19, 1981
Filed:
Dec. 13, 1978
Seigo Suzuki, Yokohama, JP;
Seiji Eguchi, Kawasaki, JP;
Abstract
An interrupt control method for a multiprocessor system including a plurality of microprocessors wherein sections of a main memory, which is shared among the processors of the system, are allocated to store entry address data pointing to a plurality of interrupt-servicing programs for each of the several processors of the system. Interrupt commands are coded to designate different interrupt levels which are compared against mask flag bits and a master mask flag bit unique to each processor to determine which processor will respond to the interrupt command. The processors are arranged in a fixed priority sequence and respond to an interrupt command in a designated priority order. Controls are provided to prevent a processor which is executing an interrupt-servicing program from responding to a subsequent interrupt command until execution of the interrupt-servicing program is completed.