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. 01, 1987
Filed:
Apr. 13, 1984
Toshiyuki Furui, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
In a data processing system for use in carrying out address translation of a preselected logical address so as to access a sequence of data elements stored in a memory (32) with an interval left between two adjacent ones of the data elements, a request control circuit (40) decides an element number in each cycle with reference to a logical distance (D) determined by the interval. The memory can be accessed in each cycle by a plurality of real addresses which are equal in number to the element number and which are calculated from the logical distance and the preselected logical address. Preferably, an address translation unit (80) is supplied with the preselected logical address and a part of the logical distance to produce a plurality of consecutive real page addresses (RPE and RPO) one of which corresponds to the preselected logical address. An address generator (50) produces a predetermined number of local logical addresses (EA.sub.0 .about.EA.sub.3) in response to the logical distance and the preselected logical address. The local logical addresses are combined with the consecutive real page addresses in an address combination circuit (100 ) to form local real addresses equal in number to the predetermined number. The local real addresses are restricted in number to the element number by a memory access controller (135) to be supplied to the memory as the real addresses.