Appendix; I/O Port Address Map - Global American 2808220 User 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
000h - 01Fh
020h - 03Fh
040h - 05Fh
060h - 06Fh
070h - 07Fh
080h - 09Fh
0A0h - 0BFh
0C0h - 0DFh
0F0h
0F1h
1F0h - 1F7h
278h - 27Fh
2E8h – 2EFh
2F8h - 2FFh
2B0h- 2DFh
360h - 36Fh
3B0h - 3BFh
3C0h - 3CFh
3D0h - 3DFh
3E8h – 3EFh
3F8h - 3FFh
Device Description
DMA Controller #1
Interrupt Controller #1
Timer
Keyboard Controller
Real Time Clock, NMI
DMA Page Register
Interrupt Controller #2
DMA Controller #2
Clear Math Coprocessor Busy Signal
Reset Math Coprocessor
IDE Interface
Parallel Port #2(LPT2)
Serial Port #4(COM4)
Serial Port #2(COM2)
Graphics adapter Controller
Network Ports
Monochrome & Printer adapter
EGA adapter
CGA adapter
Serial Port #3(COM3)
Serial Port #1(COM1)
2808220 User's Manual
APPENDIX
63