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. 23, 1996
Filed:
Aug. 02, 1994
Applicant:
Inventors:
Russell Reininger, Austin, TX (US);
Jeff Slaton, Austin, TX (US);
Assignee:
Motorola, Inc., Schaumburg, IL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
395417 ; 395486 ; 395460 ;
Abstract
A data processor (10) has a translation lookaside buffer, a 'TLB,' (56) for translating internal effective addresses into external real addresses. A user programmable bit in a special purpose register (68) controls which TLB entry in a group of entries will be replaced after an unsuccessful translation. Normally, the data processor uses a hardware controlled algorithm to select an entry for replacement. However, the user can overwrite the value in the special purpose register to force a certain replacement scheme. The user can thereby protect certain important translation mappings or deterministically test the TLB after manufacture.