IRQ5(0Dh)
Free, if not used for parallel port
IRQ6(0Eh)
Flexible disk drive controller
IRQ7(0Fh)
Free, if not used for parallel port
Using the
Setup program:
•
IRQ3 can be made available by disabling serial ports 2 and 4.
•
IRQ4 can be made available by disabling serial ports 1 and 3.
•
IRQ5 can be made available by disabling the parallel port 2.
•
IRQ7 can be made available by disabling parallel ports 1 and 2.
•
IRQ12 can be made available by disabling the mouse interrupt.
PCI Interrupt Request Lines
PCI devices generate interrupt requests using up to four PCI interrupt request lines (INTA#,
INTB#, INTC#, and INTD#).
When a PCI device makes an interrupt request, the request is re-directed to the system
interrupt controller. The interrupt request will be re-directed to one of the IRQ lines made
available for PCI devices.
All PCI devices with interrupt transfer support will use and share INTA#. A multiple-function
PCI device may use several INT lines. These devices will require more than one system
interrupt request line.
