Interrupt Request Lines (Irq) - IBASE Technology IB905 User Manual

B. Interrupt Request Lines (IRQ)
Peripheral devices use interrupt request lines to notify CPU for the service
required. The following table shows the IRQ used by the devices on
board.
Level
IRQ0
IRQ1
IRQ2
IRQ3
IRQ4
IRQ5
IRQ6
IRQ7
IRQ8
IRQ9
IRQ10
IRQ11
IRQ12
IRQ13
IRQ14
IRQ15
IRQ19
Function
System Timer Output
Keyboard
Interrupt Cascade
Serial Port #2
Serial Port #1
Reserved
Reserved
Reserved
Real Time Clock
Reserved
Serial Port #3
Serial Port #4
PS/2 Mouse
80287
Primary IDE
Secondary IDE
SATA Storage
IB905 User's Manual
APPENDIX
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