User manual

ASMB-782 User Manual 86
B.21 System I/O Ports
B.22 Interrupt Assignments
Table B.22: System I/O ports
Addr. range (Hex) Device
000-01F DMA controller
020-021 Interrupt controller 1, programmable interrupt controller
022-03F Motherboard resources
040-05F 8254 timer
060-06F 8042 (keyboard controller)
070-07F Real-time clock, non-maskable interrupt (NMI) mask
081-09F DMA page register
0A0-0BF Interrupt controller 2, programmable interrupt controller
0C0-0DF DMA controller
0F0-0FF Numeric data processor
A35-A36 On-board hardware monitor
2F8-2FF Serial port 2
378-37F Printer port (LPT1)
3B0-3BB Intel HD Graphics
3C0-3DF Intel HD Graphics
3F8-3FF Serial port 1
Table B.23: Interrupt assignments
Priority Interrupt# Interrupt source
1 NMI Parity error detected
2 IRQ0 Interval timer
3 IRQ1 PS/2 Keyboard
- IRQ2 Interrupt from controller 2 (cascade)
4 IRQ8 Real-time clock
5 IRQ9 Cascaded to INT 0A (IRQ 2)
6 IRQ10 Intel 7 series/C216 Chipset Family SMBus Host Controller
7 IRQ11 Available
8 IRQ12 PS/2 mouse
9 IRQ13 Numeric data processor
10 IRQ14 Available
11 IRQ15 Available
12 IRQ3 Serial communication port 2
13 IRQ4 Serial communication port 1
14 IRQ5 Available
15 IRQ6 Available
16 IRQ7 Parallel port 1 (print port)