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Interrupt flag

The Interrupt flag (IF) is a flag bit in the CPU's FLAGS register, which determines whether or not the (CPU) will respond immediately to maskable hardware interrupts. If the flag is set to 1 maskable interrupts are enabled. If reset (set to 0) such interrupts will be disabled until interrupts are enabled. The Interrupt flag does not affect the handling…

Privilege level, Disabling interrupts & Multiprocessor Considerations

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Privilege level

KernelProtected modeReal modeDOSDPMI
7 related topics

Disabling interrupts

Instruction setSynchronizationOperating systemsDriverRace conditions
6 related topics

Multiprocessor Considerations

MultiprocessorLocks
2 related topics

Setting and clearing

X86
1 related topics

Topics to explore

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Overview

Setting and clearing

Privilege level

Disabling interrupts

Multiprocessor Considerations

Advanced semantic analysis

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Map overview Semantic statistics

Interrupt flag

Nodes28
Edges27
Triples19
Avg. degree1.93
Density0.071429
Components1

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Interrupt flag

Top relations

related to Setting and clearing · 9
Interrupt flag → Clear Interrupt, CLI, FLAGS, In, Interrupt, Pop Flags, Set Interrupt, STI, The POPF
related to Privilege level · 7
Interrupt flag → CLI, In, Interrupt, OS, Real, STI, The POPF
related to Multiprocessor Considerations · 2
Interrupt flag → In, The Interrupt

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Important terminology

interrupt interrupts flag instruction set cli x86 program fault sti popf systems mode flags enabled programs dos privileged modify use

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
locksinstance ofIn multiprocessor systems an interrupt handler must use other synchronization mechanisms0.80text
Interrupt flagrelated to Multiprocessor ConsiderationsThe Interrupt0.60section
Interrupt flagrelated to Multiprocessor ConsiderationsIn0.60section
Interrupt flagrelated to Privilege levelIn0.60section
Interrupt flagrelated to Privilege levelOS0.60section
Interrupt flagrelated to Privilege levelInterrupt0.60section
Interrupt flagrelated to Privilege levelReal0.60section
Interrupt flagrelated to Privilege levelCLI0.60section
Interrupt flagrelated to Privilege levelSTI0.60section
Interrupt flagrelated to Privilege levelThe POPF0.60section
Interrupt flagrelated to Setting and clearingIn0.60section
Interrupt flagrelated to Setting and clearingCLI0.60section

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