Interrupt control circuit

Details Interrupt control circuit Interrupt control circuit

1993-11-17

1997-03-25

Harvey, Jack B.

395591, G06F 946

Patent

active

056153759

ABSTRACT:
An interrupt control circuit, used for a data processing unit which fetches and executes an instruction and which has an interrupt function, for controlling an interrupt request signal which is input from a device external to the data processing unit and which has a respective interrupt level assigned. The interrupt control circuit stores in an interrupt level register, interrupt-accept level data which corresponds to the instruction and specifies the interrupt level of the interrupt request signal to be accepted for interrupt; reads the interrupt-accept level data corresponding to the instruction from the interrupt level register when an instruction is fetched for execution and compares the interrupt-accept level read with the interrupt level of the interrupt request signal; and accepts the interrupt request signal to initiate the interrupt function of the data processing unit in dependence upon a result of the comparison.

REFERENCES:
patent: 4349873 (1982-09-01), Fukasawa et al.
patent: 5163152 (1992-11-01), Okamoto
patent: 5168566 (1992-12-01), Kuki et al.
patent: 5212779 (1993-05-01), Saito
patent: 5212796 (1993-05-01), Allison
patent: 5218703 (1993-06-01), Fleck et al.
patent: 5222215 (1993-06-01), Chou et al.
patent: 5222239 (1993-06-01), Rosch
patent: 5257357 (1993-10-01), Yishay et al.
patent: 5261107 (1993-11-01), Klim et al.
patent: 5280618 (1994-01-01), Takagi
patent: 5301283 (1994-04-01), Thacker et al.
patent: 5301331 (1994-04-01), Ueno et al.
patent: 5313640 (1994-05-01), Beardsley et al.
patent: 5410715 (1995-04-01), Ishimoto et al.
patent: 5495615 (1996-02-01), Nazar et al.

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