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:
Oct. 24, 2000
Filed:
May. 29, 1997
Karl Thomas Leinfelder, Wake Forest, NC (US);
Wesley Hamilton Smith, Raleigh, NC (US);
Sanjay Gupta, Raleigh, NC (US);
Navin Jaffer, Chapel Hill, NC (US);
Shahin Hedayat, San Ramon, CA (US);
Babu Mandava, San Jose, CA (US);
Cirrus Logic, Inc., Fremont, CA (US);
Abstract
A software patch method and apparatus using a content addressable memory (CAM) to produce a code change enable signal when a program memory address matches a patch memory address, to cause program execution of modem operation to be diverted to the patch code when an address comparison hit is achieved. The patching apparatus includes a program memory for applying program instructions onto a data bus for execution, unless an address comparison of a program address and a patch address causes application of a substitute address onto the data bus.