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:
Feb. 25, 2003
Filed:
Apr. 14, 2000
Zhimin Ding, Sunnyvale, CA (US);
Gregory K. Goodhue, San Jose, CA (US);
Ata R. Khan, Saratoga, CA (US);
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
A processing system with extended addressing capabilities includes a control bit that controls the number of address bytes that are stored onto a program stack. If the control bit is set to a first state, the address is pushed onto the program stack in the same manner as that used for shorter-address legacy devices. If the control bit is set to a second state, the address is pushed onto the program stack using the number of bytes required to contain a longer extended address. This same control bit controls the number of bytes that are popped off the stack upon return from an interrupt subroutine. The state of the control bit is controlled by one or more program instructions, thereby allowing it to assume each state dynamically. This dynamic control of the number of bytes pushed and popped to and from the stack allows for an optimization of stack utilization, and thereby further compatibility with legacy devices and applications.