Chapter 3
BIOS Configuration
Primary | The system wakes up fully when it detects IRQ activity. |
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|
| The system does not wake up, but the interrupt request is |
| processed. Secondary interrupts are typically |
| housekeeping devices needed to maintain the system while |
Secondary | not requiring the use of the rest of the system resources. |
| For example, IRQ8, the RTC Alarm, is configured as |
| Secondary by default. Another example might be a |
| network adapter continually polled by the network. |
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|
IRQn
The following is a list of IRQs (Interrupt Request Lines) assigned to common
system peripherals. |
|
IRQ3 (COM2) | IRQ10 (Reserved) |
IRQ4 (COM1) | IRQ11 (Reserved) |
IRQ5 (LPT2) | IRQ12 (PS/2 Mouse) |
IRQ6 (Floppy Disk) | IRQ13 (Coprocessor) |
IRQ7 (LPT1) | IRQ14 (Hard Disk) |
IRQ8 (RTCAlarm) | IRQ15 (Reserved) |
IRQ9 (IRQ2 Redir) |
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