11
2-5 To install the Expansion Cards
WARNING!
Turn off your power when adding or removing expansion cards or other
system components. Failure to do so may cause severe damage to both
your motherboard and expansion cards.
2-5-1 Procedure For Expansion Card Installation
1.
To read documentations or manuals for your expansion cards and make any necessary
hardware or software settings for your expansion card such as jumpers.
2.
To remove your computer’s cover and the bracket plate on the slot you intend to use.
3.
To align the card’s connectors and press firmly.
4.
To secure the card on the slot with the screen you remove above.
5.
To replace the computer system’s cover.
6.
To set up the BIOS if it’s necessary.
7.
To install the necessary software drivers for your expansion cards.
2-5-2 Assigning IRQs For Expansion Card
Some expansion cards need to assign an IRQ address to operate. Generally speaking, an
IRQ address must exclusively assign to one use only. With standard factory design, there
are 16 IRQs available, but most of them are already in use.
Standard Interrupt Assignments
IRQ Priority
Standard
function
0 N/A
System
Timer
1 N/A
Keyboard
Controller
2 N/A
Programmable
Interrupt
3 *
8
Communications Port (COM2)
4 *
9
Communications Port (COM1)
5 *
6
Sound Card (sometimes LPT2)
6 *
11
Floppy Disk Controller
7 *
7
Printer Port (LPT1)
8
N/A
System CMOS/Real Time Clock
9 *
10
ACPI Mode when enabled
10 *
3
IRQ Holder for PCI Steering
11 *
2
IRQ Holder for PCI Steering
12 *
4
PS/2 Compatible Mouse Port
13
N/A
Numeric Data Processor
14 *
5
Primary IDE Channel
15 *
1
Secondary IDE Channel
* These IRQs are usually available for ISA or PCI devices.
