8-2 Specifications
8.1.2 System Interrupts
Hardware IRQ System Function
IRQ 0 System Timer Interrupt (Not on ISA Bus)
IRQ 1 Keyboard (Not on ISA Bus)
IRQ 2 Primary/Secondary Controller 8254 Interface
IRQ 3 Serial Port B
IRQ 4 Serial Port A
IRQ 5 Audio (Alternate = IRQ 7, 9, 10, 11, or 12)
IRQ 6 Diskette Drive Controller
IRQ 7 Parallel Port (LPT 1)
IRQ 8 Real-Time Clock
IRQ 9 PCI Slots/USB/AGP (Optional)
IRQ 10 PCI Slots/USB/AGP (Optional)
IRQ 11 PCI Slots/USB/AGP (Default)
IRQ 12 Mouse
IRQ 13 Numeric Coprocessor
IRQ 14 Primary IDE Controller
IRQ 15 Secondary IDE Controller
8.1.3 System DMA
Hardware DMA System Function
DMA 0 Audio
DMA 1 Audio (Alternate = DMA 0)
DMA 2 Diskette Drive
DMA 3 ECP Parallel Port LPT1
DMA 4 DMA Controller Cascading (Not on ISA Bus)
DMA 5 Unused
DMA 6 Unused
DMA 7 Unused
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