MS-6421 Media Center
2-20
PCI (Peripheral Component Interconnect) Slot
The PCI slot supports LAN cards, SCSI cards, USB cards, and other add-on cards that
comply with PCI specifications. At 32 bits and 33 MHz, it yields a throughput rate of 133
MBps.
PCI Interrupt Request Routing
The IRQ, acronym of interrupt request line and pronounced I-R-Q, are hardware lines
over which devices can send interrupt signals to the microprocessor. The PCI IRQ pins
are typically connected to the PCI bus pins as follows:
32-bit PCI Slot
Order 1 Order 2 Order 3 Order 4
PCI Slot 1 INT E# INT F# INT G# INT H#
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