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. 25, 1994
Filed:
Apr. 09, 1992
Michael R Rusnack, Boise, ID (US);
Ali Piranfar, Boise, ID (US);
Hewlett-Packard Company, Palo Alto, CA (US);
Abstract
A disk drive package includes read/write circuits, a disk drive mechanism and a microprocessor. The microprocessor has a dedicated function input and an interrupt input. The dedicated function input is accessible through an external connector in the disk drive package, but the interrupt input has no direct external access. The microprocessor is programmed to examine the dedicated function input only upon power-up to determine if it has been enabled. The disk drive package is modified to include a circuit that couples the dedicated function input to the interrupt input to the microprocessor. A power supply provides a power fail imminent signal to the dedicated function input, and because the dedicated function input is connected to the interrupt input, such signal causes an interrupt to occur in the operation of the disk drive whereby any write to disk in progress is completed prior to a power fail event.