Method and apparatus for changing microcode to be executed...

Details Method and apparatus for changing microcode to be executed... Method and apparatus for changing microcode to be executed...

2004-02-09

2008-10-28

Kendall, Chuck O (Department: 2192)

Data processing: software development, installation, and managem

Software upgrading or updating

Plural version management

C717S175000, C365S049170

Reexamination Certificate

active

07444630

ABSTRACT:
A Central Processing Unit (CPU) hotpatch circuit compares the run-time instruction stream against an internal cache. The internal cache stores embedded memory addresses with associated control flags, executable instruction codes, and tag information. In the event that a comparison against the current program counter succeeds, then execution is altered as required per the control flags. If no comparison match is made, then execution of the instruction that was accessed by the program counter is executed.

REFERENCES:
patent: 5796974 (1998-08-01), Goddard et al.
patent: 5860104 (1999-01-01), Witt et al.
patent: 5887152 (1999-03-01), Tran
patent: 5983337 (1999-11-01), Mahalingaiah et al.
patent: 6049672 (2000-04-01), Shiell et al.
patent: 6295644 (2001-09-01), Hsu et al.
patent: 6691308 (2004-02-01), Kasper
IBM Technical Disclosure Bulletin, published Oct. 1, 1993.

Affiliated with

Also associated with

Rating

Method and apparatus for changing microcode to be executed... 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 and apparatus for changing microcode to be executed..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for changing microcode to be executed... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4012952