Interrupt assignments, Interrupt assignments -8, Table 1-1 – Dell Inspiron 3000 User Manual
Page 16: Nterrupt assignments

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Dell Inspiron 3000 Series Service Manual
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I
nterrupt Assignments
Table 1-1. Interrupt Assignments
IRQ Line
Used/Available
IRQ0
Generated by the system timer
IRQ1
Generated by the keyboard controller to signal that the keyboard
output buffer is full
IRQ2
Cascade to second interrupt controller
IRQ3
Reserved
IRQ4
Reserved
IRQ5
Used by the audio controller
IRQ6
Generated by the diskette drive controller to indicate that the dis-
kette drive requires the attention of the microprocessor
IRQ7
Used by the parallel port
IRQ8
Generated by the system RTC
IRQ9
Software redirect to INT0A
IRQ10
Reserved
IRQ11
Reserved
IRQ12
Generated by the keyboard controller to indicate that the output
buffer of the integrated touch pad or external PS/2 mouse is full
IRQ13
Used by the math coprocessor on the microprocessor
IRQ14
Generated by the hard-disk drive to indicate that the drive
requires the attention of the microprocessor
IRQ15
Reserved