Interrupt control apparatus and method

Details Interrupt control apparatus and method Interrupt control apparatus and method

2003-10-27

2009-08-25

Kindred, Alford W (Department: 2181)

Electrical computers and digital processing systems: processing

Processing control

Branching

C717S129000

Reexamination Certificate

active

07581090

ABSTRACT:
When a normal interrupt occurs, data of processor operation before the normal interrupt are held in a normal return address register (452), a normal previous state register (453), and a normal factor register (454). When a break-interrupt occurs, data of processor operation before the break-interrupt is held in another break return address register (455). Hence, a break-interrupt can occur even within an interrupt inhibition period by a normal interrupt. Besides, when a break-interrupt occurs, the break-interrupt state is set in a flag register (456). By referring to the flag register (456) in executing an interrupt return instruction, the operation data before the break-interrupt or before the normal interrupt can accurately be restored.

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Korean Office Action dated Jul. 18, 2006 issued in the Korean Patent Application No. 10-2000-0063082 which corresponds to the present pending US patent application (2 pages).

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