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. 19, 2011
Filed:
Oct. 07, 2008
Applicant:
Stephen E. Jones, Bellevue, WA (US);
Inventor:
Stephen E. Jones, Bellevue, WA (US);
Assignee:
Phoenix Technologies Ltd., Milpitas, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F 7/38 (2006.01); G06F 9/00 (2006.01); G06F 9/44 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method and system for executing 32-bit flat address programs during a System Management Interrupt. The system provides a 16-bit SMI routine that is given control when an SMI occurs. That routine initially saves the state of the processor and then executes an instruction to switch to protected mode. When in protected mode, the routine transfers control to 32-bit code. The 32-bit code uses a global descriptor table that is different from that used by the interrupted operating system. When the 32-bit code completes, it restores the saved processor state and returns from the interrupt by executing an RSM instruction.