APPENDIX
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 - 06Fh | Keyboard Controller |
070h - 07Fh | Real Time Clock, NMI |
080h - 09Fh | DMA Page Register |
0A0h - 0BFh | Interrupt Controller #2 |
0C0h - 0DFh | DMA Controller #2 |
0F0h | Clear Math Coprocessor Busy Signal |
0F1h | Reset Math Coprocessor |
1F0h - 1F7h | IDE Interface |
278 - 27F | Parallel Port #2(LPT2) |
2F8h - 2FFh | Serial Port #2(COM2) |
2B0 - 2DF | Graphics adapter Controller |
378h - 3FFh | Parallel Port #1(LPT1) |
360 - 36F | Network Ports |
3B0 - 3BF | Monochrome & Printer adapter |
3C0 - 3CF | EGA adapter |
3D0 - 3DF | CGA adapter |
3F0h - 3F7h | Floppy Disk Controller |
3F8h - 3FFh | Serial Port #1(COM1) |
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