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MS-9156 ATX Server Board
Slots
PCI (Peripheral Component Interconnect) Slots
The PCI slots allow you to insert the expansion cards to meet your needs.
When adding or removing expansion cards, make sure that you unplug the
power supply first. Meanwhile, read the documentation for the expansion card
to make any necessary hardware or software settings for the expansion card,
such as jumpers, switches or BIOS configuration. Two PCI slot are conven-
tional 32-bit PCI bus slots and the other two are 64-bit PCI bus (also called
PCI-
X
) slots.
32-bit PCI bus
: The bus has 32 data lines and runs at 33MHz.
64-bit PCI-X bus
: The bus has 64 data lines and runs at 66MHz. With
twice data lines and much faster PCI clock, the 64-bit PCI bus increases
the throughput and overall system performance.
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 INT
A# ~ INT D# pins as follows:
32-bit PCI Slots
(for 32-bit
short
cards only)
64-bit PCI-X Slots
(for 32-bit long cards,
64-bit short cards, &
64-bit long cards)
The motherboard provides two 32-bit Master PCI slots and two 64-bit
PCI-X slots.
