
B.22 DMA Channel Assignments
Table
Channel | Function |
0 | Available |
1 | Available |
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|
2 | Floppy disk |
|
|
3 | Available |
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4 | Cascade for DMA controller 1 |
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|
5 | Available |
6 | Available |
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|
7 | Available |
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|
B.23 Interrupt Assignments
Table
Priority | Interrupt# | Interrupt source |
1 | NMI | Parity error detected |
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|
|
2 | IRQ0 | Interval timer |
|
|
|
3 | IRQ1 | Keyboard |
- | IRQ2 | Interrupt from controller 2 (cascade) |
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|
|
4 | IRQ8 | |
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|
|
5 | IRQ9 | Cascaded to INT 0A (IRQ 2) |
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|
|
6 | IRQ10 | Available |
|
|
|
7 | IRQ11 | Available |
8 | IRQ12 | PS/2 mouse |
9 | IRQ13 | INT from |
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|
|
10 | IRQ14 | Fixed disk controller |
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|
|
11 | IRQ15 | Available |
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|
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12 | IRQ3 | Serial communication port 2 |
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|
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13 | IRQ4 | Serial communication port 1 |
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|
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14 | IRQ5 | Parallel port 2 |
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|
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15 | IRQ6 | Diskette controller (FDC) |
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|
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16 | IRQ7 | Parallel port 1 (print port) |
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|
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