IBASE MI890 - Manual (Page 49)

APPENDIX
MI890 User’s Manual 45
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