Selective shadowing of registers for interrupt processing

Details Selective shadowing of registers for interrupt processing Selective shadowing of registers for interrupt processing

1994-10-14

1997-06-24

Harvey, Jack B.

395734, 395737, 395868, G06F 1332, G06F 1324

Patent

active

056425163

ABSTRACT:
Interrupts are prioritized such that selected interrupts use shadow registers to save the current state of the machine, whereas other interrupts use a software implemented interrupt service routine (ISR) to save and restore the current machine state. Hence, the number of nested interrupts that can be serviced will not be limited to the depth of register shadowing.

REFERENCES:
patent: 4261034 (1981-04-01), Saccomano et al.
patent: 5115506 (1992-05-01), Cohen et al.
patent: 5283904 (1994-02-01), Carson et al.
patent: 5481685 (1996-01-01), Nguyen et al.

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