Method for saving and restoring the state of a CPU executing cod

Details Method for saving and restoring the state of a CPU executing cod Method for saving and restoring the state of a CPU executing cod

1993-07-23

1996-03-05

Harvey, Jack B.

Boots, shoes, and leggings

364707, G06F 100

Patent

active

054974941

ABSTRACT:
A method of saving and restoring the state of a CPU operating code in protected mode on a computer system. The save method makes use of BIOS operating in shadow RAM located in a region where linear addresses equal physical addresses while saving the state of the CPU. The registers that cannot be directly saved to memory are determined by searching the system memory for data structures that correspond to the particular register. The restore method uses dummy page tables that point to the shadowed BIOS to allow the CPU to reenter protected mode without generating a protection fault.

REFERENCES:
patent: 4851987 (1989-07-01), Day
patent: 4907150 (1990-03-01), Arroyo et al.
patent: 4933785 (1990-06-01), Morehouse et al.
patent: 5008829 (1991-04-01), Cox et al.
patent: 5021983 (1991-06-01), Nguyen et al.
patent: 5167024 (1992-11-01), Smith et al.
patent: 5189647 (1993-02-01), Suzuki et al.
patent: 5218607 (1993-06-01), Saito et al.
patent: 5269022 (1993-12-01), Shinjo et al.
patent: 5276890 (1994-01-01), Arai
"Total Recall and Instant Recall," Advertisement, Window Sources, vol. 1, No. 3, Apr. 1993, p. 40.

Affiliated with

Also associated with

Rating

Method for saving and restoring the state of a CPU executing cod does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method for saving and restoring the state of a CPU executing cod, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for saving and restoring the state of a CPU executing cod will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1418547