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. 06, 1993
Filed:
Sep. 27, 1989
Michitaka Yamamoto, Hadano, JP;
Toshinori Kuwabara, Hadano, JP;
Yoshio Oshima, Hadano, JP;
Yasutaka Yamada, Hadano, JP;
Hitachi, Ltd., Tokyo, JP;
Hitachi Computer Engineering Co., Ltd., Tokyo, JP;
Abstract
Instead of translation from a space address to a segment table origin address (STO) by an ordinary instruction, translation to the STO is done by a space base register modify instruction which uses an instruction to modify the content of the space register, and the result thereof is used for the operand address calculation of the instruction to the operand data fetching. The present system eliminates the need for additionally providing for hardware of an operand fetch unit hardware for the translation from the space address to the STO, memory for storing translation pairs of the space addresses and the STO's and the table look-up of the translation pairs. Thus, degradation of performance is minimized with less hardware.