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APPENDIX
42
IB704 User’s Manual
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
000h - 01Fh
DMA Controller #1
020h - 03Fh
Interrupt Controller #1
040h - 05Fh
Timer
060h
Keyboard Controller (1)
0601h
Control Port
064h
Real Time Clock
070h - 07Fh
Keyboard Controller (2)
080h - 09Fh
DMA Page Register
0A0h - 0BFh
Interrupt Controller #2
0C0h - 0DFh
DMA Controller #2
0F0h – 00FFh
Coprocessor
01F0h – 01F7h
03F6h
IDE (Primary)
02F8h - 02FFh
Serial Port #2(COM2)
0378h – 037Ah
Parallel Port #1(LPT1)
03C0h – 03DFh
Reserved for VGA
03F0h – 03F5h
03F7h
FDD Controller
03F8h - 3FFh
Serial Port #1(COM1)
Summary of Contents for IB704
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