13Replace processor 1 with processor 2. See "Installing a Processor" on page 68.
14Repeat step 9 through step 11.
If you have tested both the processors and the problem persists, the system board is faulty. See "Getting Help" on page 143.
IRQ Assignment Conflicts
Most PCI devices can share an IRQ with another device, but they cannot use an IRQ simultaneously. To avoid this type of conflict, see the documentation for each PCI device for specific IRQ requirements.
Table
IRQ Line | Assignment | IRQ Line | Assignment |
|
|
|
|
IRQ0 | 8254 timer | IRQ8 | RTC |
|
|
|
|
IRQ1 | Keyboard controller | IRQ9 | SCI |
|
|
|
|
IRQ2 | Cascade for IRQ9 | IRQ10 | VGA |
|
|
|
|
IRQ3 | Serial port | IRQ11 | USB controller |
|
|
|
|
IRQ4 | Serial port | IRQ12 | Mouse controller |
|
|
|
|
IRQ5 | Free | IRQ13 | Numeric data |
|
|
| Processor |
|
|
|
|
IRQ6 | Free | IRQ14 | Primary IDE |
|
|
| controller |
|
|
|
|
IRQ7 | Free | IRQ15 | Secondary IDE |
|
|
| controller |
|
|
|
|
