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APPENDIX
MI959 User’s Manual 43
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-03AFh PCI bus
0000h-03AFh 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 Standard PS/2 Keyboard
0061h-0061h System speaker
0063h-0063h Motherboard resources
0064h-0064h Standard 101/102-Key or Microsoft
Natural PS/2 Keyboard
0065h-0065h Motherboard resources
0070h-0071h System CMOS/real time clock
0072h-007Fh Motherboard resources
0081h-0083h Direct memory access controller
0084h-0086h Motherboard resources
0084h-0087h Direct memory access controller
00A0h-00A1h Programmable interrupt controller
00A2h-00BFh Motherboard resources
00A2h-00BFh Direct memory access controller
00B1h-00B1h Motherboard resources
00F0h-00FFh Numeric data processor
0170h-0177h ATA Channel 1
01F0h-01F7h ATA Channel 0
0238H-023Fh Communications Port (COM5)
02E8H-02EFh Communications Port (COM4)
02F8H-02FFh Communications Port (COM2)
0338H-033Fh Communications Port (COM6)
03E8H-03EFh Communications Port (COM3)
03F8H-03FFh Communications Port (COM1)