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I/O Adapters and Controllers

292 iSeries Handbook

PCI Card Technology

The fundamental bus architecture of the AS/400e server remains unchanged with the

implementation of PCI adapters. The AS/400e IOP architecture continues to off load cycles

from the main processor, isolate the host from adapter and network errors, and manage,

configure, and service the adapters. PCI architecture continues to offer advantages over

other system structures.

There are several types of PCI cards, each of which requires a specialized slot on the

AS/400e Model 250 backplane:

• Low-Speed PCI Adapter Cards: Low-speed PCI cards require a PCI card slot and a

PCI controller to drive them. This PCI controller can either be included on the

backplane or as a separate PCI card that attaches to the backplane.

• High-Speed PCI Adapter Cards: High-speed PCI cards require a higher bandwidth

connection to the PCI controllers than low-speed PCI cards require. The PCI controller

can be included on the backplane or as a separate PCI card that attaches to the

backplane.

• Low-Speed/High-Speed PCI Adapter Cards: The Low-speed/High-Speed PCI cards

can be installed in either a low-speed slot or high-speed slot.

• PCI Controller Cards: PCI controller cards support a number of low-speed PCI card

slots and a number of high-speed PCI card slots depending on how the backplane is

wired. They require a controller position on the backplane.

• Integrated xSeries Server for iSeries Controller Cards: The latest manufacturing

variance of the PCI controller cards, the Integrated xSeries Server for iSeries supports

PCI card slots and requires a PCI controller to drive it. The Integrated xSeries Server

occupies a reserved two-slot controller position on the backplane. One slot is for the

Integrated xSeries Server processor card, and one is for the Integrated iSeries Server

Bridge card.

V5R1 System Unit Hardware (PCI)

PCI configuration rules for V5R1 hardware are flexible. Refer to the “PCI Card Placement

Rules” chapter of the

iSeries and AS/400e System Builder

, SG24-2155, for complete rules

for placing these PCI cards in configurations.

Note

IBM i Series Handbook

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