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2.7.3Configuring an expansion card
After installing the expansion card, configure it by adjusting the software settings.
1.Turn on the system and change the necessary BIOS settings, if any. See Chapter 5 for information on BIOS setup.
2.Assign an IRQ to the card. Refer to the tables on the next page.
3.Install the software drivers for the expansion card.
Standard interrupt assignments
I R Q | Standard Function |
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1 | Keyboard Controller |
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2 | Programmable Interrupt |
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4 | Communications Port (COM1) |
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6 | Floppy Disk Controller |
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7* | Printer Port (LPT1) |
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8 | System CMOS/Real Time Clock |
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9* | ACPI Mode when used |
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10* | IRQ Holder for PCI Steering |
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11* | IRQ Holder for PCI Steering |
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12* | PS/2 Compatible Mouse Port |
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13 | Numeric Data Processor |
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14* | Primary IDE Channel |
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* These IRQs are usually available for ISA or PCI devices.
IRQ assignments for this motherboard
| A | B | C | D | E | F | G | H |
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PCI slot 1 | shared |
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PCIEX16 | shared |
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Onboard EHCI USB controller | shared |
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Onboard OHCI USB controller 1 | shared |
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Onboard OHCI USB controller 2 | shared |
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Onboard LAN | shared |
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Onboard Audio | shared |
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Onboard 1394 | shared |
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When using a PCI card on shared slots, ensure that the drivers support “Share IRQ” or that the cards do not need IRQ assignments; otherwise, conflicts will arise between the two PCI groups, making the system unstable and the card inoperable.
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