24 Chapter 1
3F0h-3F7 Standard Floppy Dis k Contro ller
3E8-3EF COM3 or LT Win modem (opt ional)
3F0-3F7 Floppy dis k con t ro lle r
3F8-3FF COM1
480-48F, 4D6 DMA controller-1
4D0-4D1
CF8-CFF
PCI configuration regi ster
IRQ Assignment Map
Interrupt Channel Function
NMI System errors
IRQ0 System timer
IRQ1 Keyboard
IRQ2 Cascade
IRQ3 R2 Card
IRQ4 COM1
IRQ5 Audio or LPT1 (optional)
IRQ6 Floppy
IRQ7 LPT1 or Audio (optional)
IRQ8 Real time clock
IRQ9 Card bus / ACPI / Modem
IRQ10 USB
IRQ11 FIR
IRQ12 PS2 poin ting device
IRQ13 Numeric da ta processor
IRQ14 1st EIDE device (hard disk)
IRQ15 2nd EIDE device (CD-ROM drive)
DMA Channel Assignment
DMA Channel Function
DRQ0 Audio or FIR (optional)
DRQ1 ECP or Audio or FIR (optiona l)
DRQ2 Floppy
DRQ3 ECP or FIR (optional)
DRQ4 Not Use d
DRQ5 Not used
DRQ6 Not used
DRQ7 Not used
I/O Address Map
I/O Address Function
340SG.book Page 24 T hursday, October 28, 1999 10:51 AM