MX45GM2 User’s Manual
25
1.4 Expansion Slots
In the future, you may need to install expansion cards. The following sub
‑
sections describe
the slots and the expansion cards that they support.
Make sure to unplug the power cord before adding or removing
expansion cards. Failure to do so may cause you physical injury and
damage motherboard components.
1.4.1 Installing an Expansion Card
1. Before installing the expansion card, read the documentation that came with it and make
the necessary hardware settings for the card.
2. Remove the system unit cover (if your motherboard is already installed in a chassis).
3. Remove the bracket opposite the slot that you intend to use. Keep the screw for later
use.
4. Align the card connector with the slot and press firmly until the card is completely seated
on the slot.
5. Secure the card to the chassis with the screw you removed earlier.
6. Replace the system cover.
1.4.2 Standard Interrupt Assignments
* There IRQs are usually available for ISA or PCI device.
IRQ
Priority
Standard Function
0 1
System
Timer
1 2
Keyboard
Controller
2
-
Redirect to IRQ#9
3
11
IRQ holder for PCI streering*
4
12
Communications Port (COM1)*
5
13
IRQ holder for PCI streering*
6
14
Floppy Disk Controller
7
15
Printer Port (LPT)*
8
3
System CMOS/Real Time Clock
9
4
IRQ holder for PCI streeing*
10
5
IRQ holder for PCI streeing*
11
6
IRQ holder for PCI streeing*
12
7
PS/2 Compatible Mouse Port*
13
8
Numeric Data Processor
14
9
Primary IDE Channel
15
10
Secondary IDE Channel
