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:
Jan. 12, 1999
Filed:
Sep. 18, 1996
Applicant:
Inventor:
Peter Guy Middleton, West Wickham, GB;
Assignee:
Advanced Risc Machines Limited, Cherry Hinton, GB;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
711133 ; 711155 ; 711159 ; 711134 ;
Abstract
A cache memory circuit 36 is described which has a separate read bus 90 and write bus 98. When a given cache row is selected, then simultaneous read and write operations can take place to different words (W#0, W#1, W#2, W#3) within the cache row using the read bus and the write bus. The cache memory circuit 38 having this configuration is particularly suited for use as a write back cache. When a cache miss occurs causing the need for a cache row to be replaced, then the words are replaced starting with the word to which an attempted access triggered the cache miss and proceeding in ascending address order.