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. 10, 1984
Filed:
Sep. 22, 1981
Yutaka Murao, Tokyo, JP;
Tokyo Shibaura Denki Kabushiki Kaisha, Kawasaki, JP;
Abstract
A data processing system is disclosed which includes a memory having a plurality of addressable register banks and for memory areas for performing a re-entrant function of a subroutine. The memory areas store a start address of an interrupt program, a program status word of the interrupt program, and a register bank pointer code to be used by the interrupt program. The memory has a program counter, a program status word, and a register bank pointer. When an interrupt request is received, the contents of a program counter, the program status word, and the register bank pointer are swapped with the contents of a particular memory area group. Further, by swapping the contents of the program counter with the contents of the register in the register bank which contains in advance the start address of the subroutine to be used, the re-entrant operation of the subroutine may be accomplished.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile