Assigning Irqs For Expansion Card; Interrupt Request Table For This Motherboard; Agp Slot - JETWAY P4XFCR2A User Manual

2-5-2 Assigning IRQs For Expansion Card

Some expansion cards need an IRQ to operate. Generally, an IRQ must exclusively assign
to one use. In a standard design, there are 16 IRQs available but most of them are already
in use.
Standard Interrupt Assignments
IRQ Priority
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.

2-5-3 Interrupt Request Table For This Motherboard

Interrupt request are shared as shown the table below:
Slot 1
Slot 2
Slot 3
Slot4
Slot5
Onboard USB 1
Onboard USB 2
AC97/MC97
IMPORTANT! If using PCI cards on shared slots, make sure that the drivers support

2-5-4 AGP Slot

This motherboard provides an AGP Slot, support the 2X/4X AGP VGA card.
N/A System Timer
N/A Keyboard Controller
N/A Programmable Interrupt
8 Communications Port (COM2)
9 Communications Port (COM1)
6 Sound Card (sometimes LPT2)
11 Floppy Disk Controller
7 Printer Port (LPT1)
N/A System CMOS/Real Time Clock
10 ACPI Mode when enabled
3 IRQ Holder for PCI Steering
2 IRQ Holder for PCI Steering
4 PS/2 Compatible Mouse Port
N/A Numeric Data Processor
5 Primary IDE Channel
1 Secondary IDE Channel
INT A INT B INT C INT D INT E INT F INT G INT H
√
√
"Shared IRQ" or that the cards don't need IRQ assignments. Conflicts
will arise between the two PCI groups that will make the system
unstable or cards inoperable.
Standard function
√
√
√
√
√
11
√