6. Appendix
84
User’s Manual
I/O Port Addresses
Table 6.1. I/O Port Addresses < 1 / 2 >
ADDRESS(hex) Description
Remark
000-00F
DMA controller 1 (slave)
ch0 - 3(8-bit transfer)
010-01F
Reserved for system
020-03F
Interrupt controller 1 (master)
040-05F
Timer
060-06F
Keyboard controller
070-07F
RTC, NMI mask
080-09F
DMA page register
0A0-0BF
Interrupt controller 2 (slave)
0C0-0DF
DMA controller 2 (master)
ch5 - 7(16-bit transfer)
0E0-0FF
Reserved for system
170-17F
IDE hard disk controller
Secondary
180-18F
Reserved for system
1E8-1EF
Reserved for system
1F0-1FF
IDE hard disk controller
Primary
270-27F
Reserved for system
290-297
Reserved for system
2E8-2EF
Reserved for system
2F8-2EF
Serial port
COM2
370-375
Reserved for system
376-377
IDE hard disk controller
Secondary
378-3AF
Reserved for system
3B0-3BB
Reserved for system
3BC-3BF
Reserved for system
3C0-3DF
Reserved for system
3E8-3EF
Reserved for system
3F0-3F7
FD controller
3F8-3FF
Serial port
COM1
400-4BF
Reserved for system
4D0-4D1
Reserved for system
510-51F SMBus
controller
A78-A7B
Reserved for system
B78-B7B
Reserved for system
BBC-BBF
Reserved for system