~48~
TECHNICAL REFERENCE
I/O PORT ADDRESS MAP
Address
Function
000 - 01F
DMA Controller #1
020 - 03F
Interrupt Controller #1
040 - 05F
Timer Chip
043
Disable Watch-Dog Times Operation (Read)
060 - 06F
Keyboard Controller
070 - 07F
Read Time Clock/NMI Mask
080 - 09F
DMA Page Register
0A0 - 0BF
Interrupt Controller #2
0C0 - 0DF
DMA Controller #2
0F0 - 0F1
Clear/Reset Math Coprocessor
1F0 - 1F7
Hard Disk Controller
200 - 210
Game Port
278 - 27F
Parallel Port #2
2E8 - 2EF
Serial Port #4 (COM 4)
2F8 - 2FF
Serial Port #2 (COM 2)
300 - 31F
Prototype Card/Streaming Tape Adapter
360 - 36F
PC Network
378 - 3FF
Parallel Port #1
380 - 38F
SDLC #2
3A0 - 3AF
SDLC #1
3B0 - 3BF
MDA Video Card (Including LPTO)
3C0 - 3CF
EGA Card
3D0 - 3DF
CGA Card
3E8 - 3EF
Serial Port #3 (COM 3)
3F0 - 3F7
Floppy Disk Controller
3F8 - 3FF
Serial Port #1 (COM 1)
443
Enable Watch-dog Timer Operation (read)
APPENDIX B
