Computer Computer Hardware User Manual

4-11
System Resources
ISA Interrupt Allocation
ISA DMA Channel Allocation
IRQ Description
IRQ0 System Timer
IRQ1 Keyboard Controller
IRQ2 Cascade Interrupt
IRQ4 COM1
IRQ5 PCI Device
IRQ6 PCI Device
IRQ7 LPT1
IRQ8 RTC
IRQ9 ACPI Controller Interrupt
IRQ10 COM4 COM6
IRQ11 COM3 COM5
IRQ12 PS/2 Mouse
IRQ13 Numeric Data Processor
IRQ14 Primary IDE Controller
IRQ15 Secondary IDE Controller
DMA Channel Description
Channel 0 Unassigned 8-bit channel
Channel 1 Unassigned 8-bit channel
Channel 2 Unassigned 8-bit channel
Channel 3 Unassigned 8-bit channel
Channel 4 Cascade channel
Channel 5 Unassigned 8-bit channel
Channel 6 Unassigned 8-bit channel
Channel 7 Unassigned 8-bit channel
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