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:
Jul. 24, 1979
Filed:
Jan. 05, 1978
Seigo Suzuki, Yokohama, JP;
Seiji Eguchi, Kawasaki, JP;
Abstract
An entry requirement control system in a multiprocessing system having a plurality of central processing units (CPU's), a common main memory for storing a plurality of programs which are accessed by the CPU's, and a key register provided between the CPU's and the common main memory. A flag bit circuit is incorporated into the system in the form of hardware in the key register and is adapted, upon completion of the execution of a program by one CPU, to only give priority to the earliest entry requirement made by a plurality of CPU's to the same program and prohibit the other CPU's from being given any priority. A flag bit circuit corresponding to each program acts, while one program is executed by one CPU, to prohibit an entry requirement from the other CPU's.