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. 15, 1992
Filed:
Jan. 09, 1992
Shinji Ohga, Tokyo, JP;
Takumi Yamazaki, Ibaragi, JP;
NEC Corporation, Tokyo, JP;
Abstract
A bus control circuit controlled by a microprogram in which a bus is employed to transfer data among a plurality of processing units. A data storage circuit connected to the bus stores the data appearing thereon which is used for carrying out microinstructions until the time when a particular microinstruction is inhibited from being executed. The storage circuit stores the last data which appeared on the bus for the microinstruction but receives an interrupt signal which prevents the storage of any new data. Then, when the execution of the microinstruction is resumed, the last stored data in the storage circuit is transferred to the data bus for performance of the microinstruction.