2 standard interrupt assignments, 3 agp slot – Asus A7N8X User Manual
Page 19

ASUS A7N8X Motherboard
1-9
1.8.2
Standard Interrupt Assignments
IRQ
Standard Function
0
System Timer
1
Keyboard Controller
2
Programmable Interrupt Controller
3*
USB Universal Host Controller
4*
Communications Port (COM1)
5*
Onboard Audio
6
Standard Floppy Disk Controller
7*
Printer Port (LPT1)
8
System CMOS/Real Time Clock
9*
Onboard LAN
10*
USB Universal Host Controller
11*
Onboard VGA
12*
PS/2 Compatible Mouse Port
13
Numeric Data Processor
14*
Ultra ATA Controller
15*
Secondary Ultra ATA Controller
*These IRQs are usually available for ISA or PCI devices.
IRQ assignments for this motherboard
A
B
C
D
PCI slot 1
shared
—
—
—
PCI slot 2
—
—
—
used
PCI slot 3
—
—
used
—
PCI slot 4
—
used
—
—
PCI slot 5
shared
—
—
—
1.8.3
AGP slot
This motherboard has an Accelerated Graphics Port (AGP) slot that supports
+1.5V AGP Pro/8X cards. Note the notches on the card golden fingers to ensure
that they fit the AGP slot on your motherboard.
A7N8X
®
A7N8X Accelerated
Graphics Port (AGP8X)
TOP VIEW
Rib (inside slot)
Rib
20-pin bay
28-pin bay
AGP Card without Retention Notch
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.