Dell Latitude Cpi - Manual (Page 12)

1-6 Dell Latitude CP and CPi Service Manual
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IRQ0 Generated by the system timer
IRQ1 Generated by the keyboard controller to signal that the keyboard
output buffer is full
IRQ2 Generated internally by the interrupt controller to enable IRQ8
through IRQ15
IRQ3 Available for use by a PC Card unless the built-in serial port or
infrared port is configured for COM2 (the default) or COM4
IRQ4 Available for use by a PC Card unless the built-in serial port or
infrared port is configured for COM1 (the default) or COM3
IRQ5 Available for use by the audio controller
IRQ6 Generated by the diskette drive controller to indicate that the
diskette drive requires the attention of the microprocessor
IRQ7 Available for use by a PC Card or audio controller if the built-in
parallel port is disabled
IRQ8 Generated by the system I/O controller’s RTC
IRQ9 Generated by the video controller
IRQ10 Available for use by a PC Card or audio controller unless the
C/Port APR or C/Dock Expansion Station is attached
IRQ11 Generated by the USB and PC Card controllers; available for use
by a PC Card
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 Reserved for use by the internal coprocessor
IRQ14 Generated by the hard-disk drive to indicate that it requires the
attention of the microprocessor
IRQ15 Generated by the CD-ROM drive in the modular bay to indicate
that the drive requires the attention of the microprocessor