IRQ Mapping Chart
IRQ0(ISA) | System Timer | IRQ15(ISA) | Secondary IDE | |||
IRQ1(ISA) | Keyboard | IRQ9(PCI) | SMBus | |||
IRQ3(ISA) | COM2 | IRQ16(PCI) | USB Universal | |||
IRQ4(ISA) | COM1 | IRQ16(PCI) | Graphics | |||
IRQ8(ISA) | System CMOS/RTC | IRQ17(PCI) | AC’97 | |||
IRQ9I(ISA) | IRQ18(PCI) | USB Universal | ||||
IRQ10(ISA) | COM4 | IRQ19(PCI) | USB Universal | |||
IRQ11(ISA) | COM3 | IRQ20(PCI) | Network #2 | |||
IRQ12(ISA) | Mouse | IRQ21(PCI) | Network | |||
IRQ13(ISA) | Math Coprocessor | IRQ23(PCI) | USB2 Enhanced | |||
IRQ14(ISA) | Primary IDE |
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DMA Channel Assignments |
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CHANNEL |
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| FUNCTION |
| ||
0 |
|
| Available |
|
| |
1 |
|
| Available |
|
| |
2 |
|
| Available |
|
| |
3 |
|
| Available |
|
| |
4 |
|
| Cascade for DMA controller 1 | |||
5 |
|
| Available |
|
| |
6 |
|
| Available |
|
| |
7 |
|
| Available |
|
| |