APPENDIX
IB550F User’s Manual
49
Appendix
A. I/O Port Address Map
Each peripheral device in the system is assigned a set of I/O port
addresses which also becomes the identity of the device. The following
table lists the I/O port addresses used.
Address
Device Description
0000h-000Fh
Direct memory access controller
0020h-0021h
Programmable interrupt controller
0022h-003Fh
PCI bus
0040h-0043h
System timer
0044h-0047h
PCI bus
004Ch-006Fh
PCI bus
0060h-0060h
PC/AT Enhanced PS/2 Keyboard
(101/102-Key)
0061h-0061h
System speaker
0064h-0064h
PC/AT Enhanced PS/2 Keyboard
(101/102-Key)
0070h-0071h
System CMOS/real time clock
0072h-007Fh
PCI bus
0081h-0083h
Direct memory access controller
0087h-0087h
Direct memory access controller
0089h-008Bh
Direct memory access controller
008Fh-0091h
Direct memory access controller
0090h-0091h
PCI bus
0093h-009Fh
PCI bus
00A0h-00A1h
Programmable interrupt controller
00A2h-00BFh
PCI bus
00C0h-00DFh
Direct memory access controller
00E0h-00EFh
PCI bus
00F0h-00FFh
Numeric data processor
0100h-0CF7h
PCI bus
0170h-0177h
Secondary IDE Channel
01F0h-01F7h
Primary IDE Channel
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