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. 26, 1991
Filed:
Oct. 23, 1987
Shinichiro Yamaguchi, Hitachi, JP;
Hidekazu Matsumoto, Hitachi, JP;
Tadaaki Bandoh, Ibaraki, JP;
Hirokazu Hirayama, Hitachi, JP;
Takayuki Morioka, Hitachi, JP;
Soichi Takaya, Hitachi, JP;
Yukio Kawamoto, Hitachi, JP;
Jushi Ide, Mito, JP;
Yoshihiro Miyazaki, Hitachi, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
Method and apparatus for instruction restart processing in a microprogram - controlled data processing apparatus, wherein, in restarting an instruction execution after instruction suspension, the internal information of the data processing apparatus at the time of instruction execution suspension is saved in a memory, and after a suspension cause removal process performed the saved internal information is recovered. A check point address associated with the address of a currently executing microprogram is stored in accordance with a designation by the microprogram. After a suspension causes removal process is performed, the execution of the instruction restarts using the check point address. If a check point address has not been stored after the suspension cause removal process is performed, the execution of the instruction restarts from a read operation of the suspended instruction from the main storage.