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2-21ASUS TW300-E5/PI4
2.7.3 Interrupt assignments
IRQ assignments for this motherboard
A B C D E F G H
PCI Slot 1 Shared – – – – – – –
PCI Slot 2 – Shared – – – – – –
LAN 1 (8056) – – Shared – – – – –
LAN 2 (8056) – – – Shared – – – –
SATA (Marvell) Shared – – – – – – –
PCIe X16_1 Shared – – – – – – –
PCIe X16_2 Shared – – – – – – –
PCIe X1_1 – Shared – – – – – –
PCIX_1 – Shared – – – – – –
USB Controller 1 – – – – – – – Shared
USB Controller 2 – – – Shared – – – –
USB Controller 3 – – Shared – – – – –
USB Controller 4 Shared – – – – – – –
USB Controller 5 Shared – – – – – – –
USB Controller 6 – – – – – Shared – –
USB 2.0 Controller 1 – – – – – – – Shared
USB 2.0 Controller 2 – – Shared – – – – –
SATA Controller 1 – – Shared – – – – –
SATA Controller 2 – – – – – – Shared –
Azalia ALC888 – – – – – – Shared –
IRQ Priority Standard function
0 1 System timer
1 2 Keyboard controller
2
– Re-direct to IRQ#9
3 11 IRQ holder for PCI steering*
4 12 Communications port (COM1)*
5 13 IRQ holder for PCI steering*
6 14 Floppy disk controller
7 15 IRQ holder for PCI steering*
8 3 System CMOS/Real Time Clock
9 4 IRQ holder for PCI steering*
10 5 IRQ holder for PCI steering*
11 6 IRQ holder for PCI steering*
12 7 PS/2 compatible mouse port*
13 8 Numeric data processor
14 9 IRQ holder for PCI steering*
15 10 IRQ holder for PCI steering*
* These IRQs are usually available for PCI devices.