Expansion Slots; Configuring An Expansion Card; Standard Interrupt Assignments - Asus A7V8X-MX User Manual

1.10 Expansion slots

The A7V8X-MX motherboard has three (3) PCI and one (1) Accelerated Graphics
Port (AGP). The following sub-sections describe the slots and the expansion cards
that they support.

1.10.1 Configuring an expansion card

Some expansion cards need an IRQ to operate. Generally, an IRQ must be
exclusively assigned to one function at a time. In a standard design configuration,
16 IRQs are available but most are already in use.
Normally, 6 IRQs are free for expansion cards. Sometimes IRQs are "shared" by
more than one function; in this case, IRQ assignments are swapped automatically
or adjusted through the BIOS firmware.

1.10.2 Standard Interrupt Assignments

IRQ
0
1
2
3*
4*
5*
6
7*
8
9*
10*
11*
12*
13
14*
15*
*These IRQs are usually available for ISA or PCI devices.
IRQ assignments for this motherboard
PCI slot 1 shared
PCI slot 2
PCI slot 3
AGP slot shared
1-12
Standard Function
System Timer
Keyboard Controller
Programmable Interrupt Controller
USB Universal Host Controller
Communications Port (COM1)
Onboard Audio
Standard Floppy Disk Controller
Printer Port (LPT1)
System CMOS/Real Time Clock
Onboard LAN
USB Universal Host Controller
Onboard VGA
PS/2 Compatible Mouse Port
Numeric Data Processor
Ultra ATA Controller
Secondary Ultra ATA Controller
A B C
– –
– shared –
– – shared
– –
D E F`
– – –
– – –
– – –
– – –
Chapter 1: Product Information
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