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Chapter 1 25
I/O Address Map
I/O Address Function
0000-001F DMA controller
0020-0029, 002C-002D Programmable interrupt controller
002E-002F PCI bus
0030-0031, 0034-0035, 0038-0039,
003C-003D
Programmable interrupt controller
0040-0043, 0050-0053 System timer
0060, 0064 Keyboard controller
0062, 0066 ACPI-Compliant Embedded Controller
0070-0077 System CMOS/real time clock
0081-0091, 0093-009F DMA controller
00A0-00A1, 00A4-00A5, 00A8-00A9,
00AC-00AD, 00B0-00B5, 00B8-00B9,
00BC-00BD
Programmable interrupt controller
00C0-00DF DMA controller
00F0-00F0 Numeric data processor
0170-0177, 0376 2nd EIDE device (optical drive) select
01F0-01F7, 03F6 1st EIDE device (hard drive) select
0274-0277, 0279, 0A79 ISAPNP Read Data Port
02F8-02FF IrDA FIR
03B0-03BB, 03C0-03DF, 1800-1807 Video Controller
03F0-03F5, 03F7 Standard Floppy Disk Controller
04D0-04D1 Programmable interrupt controller
0D00-FFFF PCI bus
1810-181F Ultra ATA Storage Controller
1820-187F USB Universal Host Controller
1881-189F SMBus Controller
18C0-18FF, 1C00-1CFF Audio Controller
2000-207F, 2400-24FF Modem Controller
3000-30FF Ethernet Controller
FC00-FFFF Compatible CardBus Controller
IRQ Assignment Map
Interrupt Channel Function (Hardware)
IRQ00 System timer
IRQ01 Keyboard
IRQ03 IrDA FIR/PCI candidate
IRQ04 COM1/PCI candidate
IRQ05 PCI candidate
IRQ06 Reserved
IRQ07 LPT (Parallel port)/PCI Candidate
IRQ08 CMOS/RTC
IRQ09 SCI IRQ used by ACPI