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. 11, 2000
Filed:
Mar. 30, 1998
Myke Predko, North York, CA;
Celestica International Inc., North York, CA;
Abstract
A central processing unit having at least one memory for storing instructions and data includes a program counter for storing program counter values. An execution unit retrieves and processes instructions located in the memory at addresses corresponding to the contents of the program counter. Multiple stacks independent of the memory are provided for storing program counter values. A multiplexer connects the program counter to each stack. A stack select register connected to a control input of the multiplexer enables the transfer of program counter values between the program counter and one of the stacks indicated by the contents of the stack select register. The central processing unit provides an efficient multi-tasking capability since the program counter state of each task can be stored in one of the multiple stacks.