Appendix, A. i/o port address map – IBASE MI889 User Manual
Page 53
APPENDIX
MI889 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 that also becomes the identity of the device. The following
table lists the I/O port addresses used.
Address
Device Description
0000h-0CF7h PCI
bus
0000h-0CF7h Direct
memory access controller
0010h-001Fh Motherboard
resources
0020h-0021h
Programmable interrupt controller
0022h-003Fh Motherboard
resources
0040h-0043h System
timer
0044h-005Fh Motherboard
resources
0060h-0060h Motherboard
resources
0061h-0061h System
speaker
0062h-0063h Motherboard
resources
0064h-0064h Motherboard
resources
0065h-006Fh Motherboard
resources
0070h-0071h
System CMOS/real time clock
0072h-007Fh Motherboard
resources
0080h-0080h Motherboard
resources
0081h-0083h
Direct memory access controller
0084h-0086h Motherboard
resources
0087h-0087h
Direct memory access controller
0088h-0088h Motherboard
resources
0089h-008Bh Direct
memory access controller
008Ch-008Eh Motherboard
resources
008Fh-008Fh
Direct memory access controller
0090h-009Fh Motherboard
resources
00A0h-00A1h
Programmable interrupt controller
00A2h-00BFh Motherboard
resources
00C0h-00DFh Direct
memory access controller
00E0h-00EFh Motherboard
resources
00F0h-00FFh
Numeric data processor
01F0h-01F7h
Primary IDE Channel
0274h-0277h
ISAPNP Read Data Port
0279h-0279h
ISAPNP Read Data Port