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:
Apr. 25, 1995
Filed:
Mar. 26, 1993
Applicant:
Inventors:
Robert J Skruhak, Austin, TX (US);
James C Nash, Austin, TX (US);
Kuppuswamy Raghunathan, Austin, TX (US);
Assignee:
Motorola, Inc., Schaumburg, IL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
395800 ; 3642446 ; 364D / ;
Abstract
A data processor has a microcode memory which is reduced in size by sharing word locations having the same contents. When one of the shared word locations is addressed, a control signal is generated and coupled to a select circuit. The select circuit outputs a predetermined operand in place of the contents of the addressed shared word location which can contain a 'do not care' operand value. Selective sharing or combining of the word locations is utilized when structuring the memory to optimize savings in circuit area.