| Little Board/P5x Technical Manual | |
Table 2– 8. Interrupt Channel Assignments | ||
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Interrupt | Function |
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IRQ0 | ROM BIOS clock tick function, from Timer 0 |
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IRQ1 | Keyboard interrupt |
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IRQ2 | Cascade input for |
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IRQ3 | Serial 2, Serial 4 (shared) |
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IRQ4 | Serial 1, Serial 3 (shared) |
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IRQ5 | PCI |
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IRQ6 | Floppy controller |
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IRQ7 | Parallel port (option) |
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IRQ8 | Reserved for |
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IRQ9 | PCI |
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IRQ10 | PCI |
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IRQ11 | PCI |
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IRQ12 | PS/2 Mouse |
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IRQ13 | Reserved for coprocessor |
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IRQ14 | Primary IDE hard disk controller |
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IRQ15 | Secondary IDE hard disk controller |
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Note: IRQs for the Ethernet, Video, and SCSI interfaces are |
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automatically assigned by the BIOS plug and play logic. |
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PCI Interrupts assigned during initialization cannot be used by non- |
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PCI devices. |
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