3. Align the card’s connectors and press firmly.
4. Secure the card on the slot with the screen you remove above.
5. Replace the computer system’s cover.
6. Set up the BIOS if necessary.
7. Install the necessary software driver for your expansion card.
2-5-2 Assigning IRQs For Expansion Card
Some expansion cards need an IRQ to operate. Generally, an IRQ must exclusively
assign to one use. In a standard design, there are 16 IRQs available but most of them
are already in use.
Standard Interrupt Assignments
IRQ
Priority
Standard function
0
1
System Timer
1
2
Keyboard Controller
2
N/A
Programmable Interrupt
3 *
11
Communications Port (COM2)
4 *
12
Communications Port (COM1)
5 *
13
Sound Card (sometimes LPT2)
6
14
Floppy Disk Controller
7 *
15
Printer Port (LPT1)
8
3
System CMOS/Real Time Clock
9 *
4
ACPI Mode when enabled
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
* These IRQs are usually available for ISA or PCI devices.
2-5-3 Interrupt Request Table For This Motherboard
Interrupt request are shared as shown the table below:
INT A
INT B
INT C
INT D
PCI slot 1
Shared
PCI slot 2
Shared
PCI slot 3
Shared
Onboard VGA
AC97/MC97
Shared
Onboard USB
Shared
Onboard USB 2
Shared
LAN
(for 630CF Only)
Shared
15
