Hardware Setup
2-19
PCI Interrupt Request Routing
The IRQ, abbreviation of interrupt request line and pronounced I-R-Q, are
hardware lines over which devices can send interrupt signals to the
microprocessor. The “PCI & LAN” IRQ pins are typically connected to the
PCI bus INT A# ~ INT D# pins as follows:
Order 1
Order 2
Order 3
Order 4
PCI Slot 1
INT B#
INT C#
INT D#
INT A#
IEEE1394
INT B#
PCI Slot
The PCI slot allows you to insert PCI expansion card. When adding or re-
moving expansion cards, make sure that you unplug the power supply first.
Meanwhile, read the documentation for the expansion card to make any nec-
essary hardware or software settings for the expansion card, such as jumpers,
switches or BIOS configuration.
Slots
PCI Slot
