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:
Mar. 22, 1994
Filed:
Sep. 18, 1989
Applicant:
Inventors:
Koji Masui, Hitachi, JP;
Masayuki Tanji, Hitachi, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F / ; G06F / ;
U.S. Cl.
CPC ...
395725 ; 395275 ; 395325 ; 364D / ; 3642401 ; 3642412 ; 3642426 ;
Abstract
An interruption signal from a common input/output device is coupled to all processors through a common bus, and each processor issues to the common bus its own interruption receipt acceptance or negation state and the respective processors watch and decide individually interruption receipt acceptance or negation states on the common bus of the individual processors. Only one of processors which are ready to accept the receipt of interruption is allowed to accept the receipt of an interruption signal from the common input/output device in accordance with a predetermined priority.