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. 08, 1997
Filed:
Jun. 12, 1996
Milind Karnik, Aloha, OR (US);
Joseph Batz, Beaverton, OR (US);
Intel Corporation, Santa Clara, CA (US);
Abstract
A multi-processor system that supports multiple programmable interrupt controllers (PIC). An advanced programmable interrupt controller (APIC) provides interface between the processors and the PICs. The APIC provides interface between processors and other I/O devices also. The APIC sends an interrupt request data packet with a first field set to a processor identification number, a second field set to a type of the device that sent interrupt request and a third field. The third field is set to an interrupt vector if the device sending the interrupt request to the APIC is a device other than PIC. The third field is set to a predetermined identification number of the PIC if the interrupt request is from the PIC. A processor, to which the interrupt is directed to, receives the packet. If the interrupt request is from a PIC, the processor uses the third field to identify which of the multiple PICs caused the interrupt. If the interrupt is from a device, other than a PIC, the processor uses the third field to determine an interrupt vector corresponding to the device.