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Latitude LM
Service manual
Interrupt Assignments; Table 1-1. Interrupt Assignments - Dell Latitude LM Service Manual
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:
Reference and troubleshooting manual
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Supplementary manual
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Service manual
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Latitude LM
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 key-
board output buffer is full
IRQ2
Cascade to second interrupt controller
IRQ3
Used by the infrared port (COM2)
IRQ4
Used by the serial port (COM1)
IRQ5
Used by the audio controller
IRQ6
Generated by the diskette drive controller to indicate that the
diskette drive requires the attention of the microprocessor
IRQ7
Used by the parallel port
IRQ8
Generated by the system RTC
IRQ9
Software redirect to INTOA
IRQ10
Reserved
IRQ11
Reserved
IRQ12
Generated by the keyboard controller to indicate that the out-
put 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
System Overview
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