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:
Oct. 16, 2001
Filed:
Sep. 30, 1998
Van Hoa Lee, Cedar Park, TX (US);
David Lee Randall, Leander, TX (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A processor register is reserved by early firmware code to be employed for checkpoint logging or for storing diagnostic information at the time of failure before a checkpoint display device, usually contained within an I/O subsystem, is initialized. Early firmware codes are usually written in assembly language and the firmware of the present invention dedicates a processor register for logging checkpoint information. If a machine fails before any checkpoint, or point of failure, is displayed by a checkpoint display device, a dedicated processor register has logged any checkpoint or diagnostic information. The error information relating to the failure is obtained from the dedicated register through JTAG (Joint Task Action Group) scanning utilizing a processor debugging tool.