Electrical computers and digital data processing systems: input/ – Interrupt processing – Processor status
Patent
1996-02-09
1999-09-07
Harvey, Jack B.
Electrical computers and digital data processing systems: input/
Interrupt processing
Processor status
395670, 710264, 710269, 710 50, G06F 922
Patent
active
059480939
ABSTRACT:
An interrupt polling unit included within a bus interface unit of a microprocessor is provided. The interrupt polling unit causes an interrupt acknowledge bus transaction to occur. If an interrupt controller receiving the interrupt acknowledge bus transaction returns an interrupt vector indicative of an interrupt service routine, then the microprocessor executes the interrupt service routine. The number of interrupt acknowledge bus transactions associated with the interrupt is reduced from two to one. In one embodiment, the interrupt polling unit causes an interrupt acknowledge bus transaction to occur when the microprocessor is performing a task switch. The task switch may be performed by hardware included within the microprocessor or, alternatively, by software executing upon the microprocessor.
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Belt Steven L.
Christie David S.
Swanstrom Scott E.
Advanced Micro Devices , Inc.
Harvey Jack B.
Kivlin B. Noel
Phan Raymond N
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