Electrical computers and digital data processing systems: input/ – Interrupt processing – Interrupt queuing
Reexamination Certificate
2005-01-19
2008-12-09
Phan, Raymond N (Department: 2111)
Electrical computers and digital data processing systems: input/
Interrupt processing
Interrupt queuing
C710S267000
Reexamination Certificate
active
07464210
ABSTRACT:
This invention provides a data processing system capable of performing an interrupt exception handling routine as many times as the number of times of occurrence of a request event for the same interrupt exception handling routine if the request event occurs a plurality of times. A software interrupt counter or a hardware interrupt counter for retaining the number of times of occurrence of an interrupt request generation event counts up when a software processing which generates a software interrupt or a hardware event that generates a hardware interrupt occurs, and counts down when a CPU performs a processing for removing the interrupt request. If the value of the software interrupt counter and the value of the hardware interrupt counter are not zero, a software interrupt request signal and a hardware interrupt request signal to the CPU are asserted.
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“Interrupt handler” Wikipedia, http://en.wikipedia.org/wiki/Interrupt—handler.
Gotoh Takahiro
Inoue Masafumi
Kataoka Takeshi
Komori Hirokazu
Kubota Hideo
A. Marquez, Esq. Juan Carlos
Denso Corporation
Fisher Esq. Stanley P.
Phan Raymond N
Reed Smith LLP
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