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:
Sep. 17, 1996
Filed:
Mar. 30, 1993
Atsuo Kawaguchi, Saitama-ken, JP;
Hiroshi Motoda, Saitama-ken, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
This invention relates to the data processing system which provides, for example, data protection in units smaller than the page or the segment in a more flexible form without causing a marked decrease in efficiency. The conventional data word array has added thereto auxiliary memory bit array and a control unit, such that when a data word is read or updated, the execution of the program is interrupted according to the value of an auxiliary memory bit and a predetermined procedure is called. In this way, the set value of the auxiliary memory bit is used to specify that the processing is to be interrupted each time a data word with the set bit value is read or written.