Asus A7N8X - 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.