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:
Nov. 03, 1992
Filed:
Mar. 02, 1989
Applicant:
Inventors:
Assignee:
Ricoh Company, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
395725 ; 3642412 ; 3642422 ; 3642597 ; 3642416 ; 364D / ; 395425 ;
Abstract
An indirect address type interrupt control circuit is provided. A plurality of interrupt control units are provided for receiving an input interrupt signal and generating a vector address which corresponds to the interrupt signal. Also provided in the circuit is a control unit which responds to the input interrupt signal to cause only one of the plurality of interrupt control units which corresponds to the interrupt signal to be rendered operative. With this structure, the number of interrupt request signals can be increased or decreased with ease.