Patent
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.
Hedayat Shahin
Mandava Surendra
Alford William E.
Cirrus Logic Inc.
Etienne Ario
Harvey Jack B.
Stewart David L.
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