最終更新:2016-09-16 (金) 15:46:44 (1157d)  

IRQ番号 はてなブックマークを見る
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デバイスマネージャ

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Linux

x86

  • Master PIC
    IRQ0system timer (cannot be changed)
    IRQ1keyboard controller (cannot be changed)
    IRQ2?cascaded signals from IRQs 8–15 (any devices configured to use IRQ 2 will actually be using IRQ 9)
    IRQ3?serial port controller for serial port 2 (shared with serial port 4, if present)
    IRQ4?serial port controller for serial port 1 (shared with serial port 3, if present)
    IRQ5?parallel port 2 and 3 or sound card
    IRQ6?floppy disk controller
    IRQ7?parallel port 1. It is used for printers or for any parallel port if a printer is not present. It can also be potentially be shared with a secondary sound card with careful management of the port.
  • Slave PIC
    IRQ8real-time clock (RTC)
    IRQ9?Advanced Configuration and Power Interface (ACPI) system control interrupt on Intel chipsets.[1] Other chipset manufacturers might use another interrupt for this purpose, or make it available for the use of peripherals (any devices configured to use IRQ 2 will actually be using IRQ 9)
    IRQ10?The Interrupt is left open for the use of peripherals (open interrupt/available, SCSI or NIC)
    IRQ11?The Interrupt is left open for the use of peripherals (open interrupt/available, SCSI or NIC)
    IRQ12?mouse on PS/2 connector
    IRQ13?CPU co-processor or integrated floating point unit or inter-processor interrupt (use depends on OS)
    IRQ14?primary ATA channel (ATA interface usually serves hard disk drives and CD drives)
    IRQ15?secondary ATA channel

メモ

  • 8259の割り込みラインはIRQ0 はタイマ、IRQ4はCOMA、…などそれぞれ割り込みラインが割り当てられています。
  • PCIの割り込みは、残るIRQ5、IRQ9、IRQ10、IRQ11などを (共有の上) 利用します。ただし、ISAの割り込みはエッジトリガであったため、共有はできません。

関連

参考