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The following tables list the
channels, and I/O port addresses of the PC.
IRQ | Status |
|
|
0 | System timer |
|
|
1 | Keyboard |
|
|
2 | IRQ controller |
|
|
3 | Free |
|
|
4 | Serial port |
|
|
5 | Sound |
|
|
6 | Floppy disk |
|
|
7 | Parallel port |
|
|
8 | |
|
|
9 | Free |
|
|
10 | |
|
|
11 | Free or assigned to USB |
|
|
12 | Mouse |
|
|
13 | |
|
|
14 | Primary IDE |
|
|
15 | Secondary IDE |
|
|
*1 Because of PCI device, the allocated IRQ level may be changed.
DMA | Status |
|
|
0 | Free |
|
|
1 | Free |
|
|
2 | Floppy disk |
|
|
3 | Free |
|
|
4 | DMA controller |
|
|
5 | Free |
|
|
6 | Free |
|
|
7 | Free |
|
|
I/O | Status |
|
|
0200h to 0207h | Joystick |
|
|
0330h to 0331h | |
|
|
0378h to 037Fh | Parallel port |
|
|
03F8h to 03FFh | Serial port |
|
|
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