Chapter 1
Overview
PCI-X I/O
16
PCI-X Transfer Board
The PCI-X I/O transfer board connects several power sources and utilities signals from the PCI-X PB to the
PCI-X I/O backplane.
Core I/O
Core I/O refers to the base set of I/O functions required by every partition. The core I/O card uses a standard
full-length PCI-X form factor but adds a secondary edge connector in line with its PCI-X connector. PCI-X slot
0 on the I/O backplane has been designed to accommodate the Core I/O requirements without impeding that
slot’s ability to support standard PCI-X add-in cards.
Each partition must have at least one core I/O card in order to boot. Multiple core I/O cards may be present
within a partition (one core I/O card is supported per I/O backplane). Only one card's partition interface,
however, will be active at a time. Notice that this does not apply to the Ethernet portion of the board, which
can be active on multiple boards at the same time. The MP communicates with Core I/O through a USB
interface that is internal to the cabinet. The microprocessor on the Core I/O runs Partition Interface
firmware.
External interfaces are provided for system 10/100BT LAN. An external port may be added to support VGA
and mouse. Windows Server 2003, Datatcenter requires a Windows-based LAN card as it does not use the
LAN capability provided by the standard Core I/O card.
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