2.5.2Configuring an expansion card
After installing the expansion card, configure the 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 following tables.
3.Install the software drivers for the expansion card.
Standard interrupt assignments
IRQ | Priority | Standard Function |
0 | 1 | System Timer |
1 | 2 | Keyboard Controller |
2 | N/A | |
3* | 11 | Communications Port (COM2) |
4* | 12 | Communications Port (COM1) |
5* | 13 | IRQ Holder for PCI steering |
6 | 14 | Floppy Disk Controller |
7* | 15 | Printer Port (LPT1) |
8 | 3 | System CMOS/Real Time Clock |
9* | 4 | IRQ Holder for PCI Steering |
10* | 5 | IRQ Holder for PCI Steering |
11* | 6 | IRQ Holder for PCI Steering |
12* | 7 | PS/2 Compatible Mouse Port |
13 | 8 | Numeric Data Processor |
14* | 9 | Primary IDE Channel |
15* | 10 | Secondary IDE Channel |
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*These IRQs are usually available for ISA or PCI devices.
IRQ assignments for this motherboard
| INTA# | INTB# | INTC# | INTD# | REQ# | GNT# |
ICH5R IDE contrl. | PIRQC# | — | — | — | — | — |
ICH5R SATA contrl. | PIRQC# | — | — | — | — | — |
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ICH5R SMBus contrl. | PIRQB# | — | — | — | — | — |
ICH5R USB UHCI contrl. #1 | PIRQA# | — | — | — | — | — |
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ICH5R USB UHCI contrl.#2 | PIRQD# | — | — | — | — | — |
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ICH5R USB 2.0 EHCI contrl. | PIRQH# | — | — | — | — | — |
PXH2_A_0 | PXH2_A_1 | — | — | PXH2_A_0 PXH2_A_0 | ||
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PXH2_A_2 | — | — | — | PXH2_A_1 | PXH2_A_1 | |
ATI RAGE XL video contrl. | PIRQB# | — | — | — | REQ1H# | GNT1# |
PCIX slot 1 | PXH1_B_0 | PXH1_B_1 | PXH1_B_2 | PXH1_B_3 | PXH1_B_0 | PXH1_B_0 |
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ASUS | 2 - 13 |