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30 Chapter 1
3B0-3BB
3C0-3DF
Video Controller
3F0h-3F7 Standard Floppy Disk Controller
3E8-3EF COM3 or LT Win modem (optional)
3F0-3F7 Floppy disk controller
3F8-3FF COM1
480-48F, 4D6 DMA controller-1
4D0-4D1
CF8-CFF
PCI configuration register
IRQ Assignment Map
Interrupt Channel Function
IRQ0 System timer
IRQ1 Keyboard
IRQ2 Cascade
IRQ3 IR
IRQ4 COM1 (Serial port)
IRQ5 Reserved for R2 card
IRQ6 Floppy
IRQ7 LPT (Parallel port)
IRQ8 CMOS/RTC
IRQ9 SCI IRQ used by ACPI bus
IRQ10 Audio (PIRQB#), Modem (PIRQB#), SMBUS controller (PIRQB#), IEEE 1394
(PIRQ#), 802.11b (PIRQE#), LAN (PIRQTE#)
IRQ11 VGA (PIRQA#), USB (PIRQA#, PIRQC#, INTD#), CardBus controller
(PIRQB#, PIRQB#)
IRQ12 PS/2 device
IRQ13 Math processor
IRQ14 1st EIDE device (hard disk)
IRQ15 2nd EIDE device (CD-ROM drive)
DMA Channel Assignment
DMA Channel Function
DRQ0 Reserved
DRQ1 Reserved
DRQ2 Floppy
DRQ3 Reserved
DRQ4 DMA controller
DRQ5 Reserved
DRQ6 Reserved
DRQ7 Reserved
I/O Address Map
I/O Address Function