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Interrupt control apparatus and method separately holding respective operation information of a processor preceding a normal or a break interrupt

  • US 6,681,280 B1
  • Filed: 10/04/2000
  • Issued: 01/20/2004
  • Est. Priority Date: 10/29/1999
  • Status: Active Grant
First Claim
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1. An interrupt control apparatus having a function of normal interrupt and a function of break-interrupt, said apparatus comprising:

  • a first information holding section for holding, at the time of a normal interrupt, operation information of a processor before said normal interrupt;

    a second information holding section for holding, at the time of a break-interrupt, operation information of said processor before said break-interrupt;

    a return operation specifying section for specifying whether a return operation from a normal interrupt state or a return operation from a break-interrupt state is to be performed in returning from an interrupt operation; and

    an interrupt return section for re-setting operation information held in said first information holding section or operation information held in said second information holding section in accordance with operation contents specified by said return operation specifying section, and thereby returning the state of said processor from an interrupt operation state to a state before the interrupt.

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