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명령어 사이클
인출 사이클(Instruction Fetch Cycle)
실행 사이클(Instruction Execution Cycle)
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간접 사이클(Indirect Cycle)
인터럽트 사이클
• CPU가 프로그램 실행 중에 인터럽트 신호 처리를 요청
◦ CPU는 원래의 프로그램 수행을 중단한다.
◦ 요구된 인터럽트를 위한 서비스 프로그램을 먼저 수행한다.
▪ 어떤 장치가 인터럽트를 요구했는지 확인한다.
▪ 해당 인터럽트 서비스 루틴을 호출한다.
◦ 인터럽트 처리가 끝나면 본 프로그램으로 복귀한다.

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Instruction cycle