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:
Dec. 09, 1986
Filed:
Jan. 28, 1983
Hideo Sawada, Hadano, JP;
Kiyoshi Yata, Hadano, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A data processing apparatus for a virtual memory system including a logical address register, a real address register, a paged address translation table and an address translation buffer in which a map of a fraction of the paged address translation table is stored columnwise. Upon checking address translatability of a logical address into a real address, a bit of a translation control word contained in the column of the address translation buffer relevant to that logical address indicates whether or not a succeeding logical address is susceptible to the address translation. Necessity to pretest the address translatability of every logical address is obviated. System overhead is considerably reduced.