User's Manual

70 Board Manual

Intel

IQ80321 I/O Processor Evaluation Platform

External RAID Section

4.2 Interrupt Routing

The interrupt lines for devices on the SPCI-X bus (Expansion Slot and Intel

82544 Gigabit Ethernet

Controllerr) are routed based on requirements.

Table 87. Interrupt Routing for Secondary PCI-X Private Device

Number Description

4.2.1

The INTA# and INTB# of PCI-X Expansion Slot are routed to XINT0# and XINT1# External

Interrupt inputs on the Intel

80321 I/O processor.

4.2.2

The INTA# of Intel 82544 Controller is routed to XINT2# External Interrupt input on the

80321.

4.2.3 The interrupt routing scheme is based on Figure 18.

Figure 18. Interrupt Routing for Private Device Configuration

A9460-02

XINT0#

Intel

80321 I/O Processor

INTA#

INTB#

INTC#

INTD#

INTA#

INTB#

INTA#

INTB#

INTC#

INTD#

MUX

XINT2#

MUX

XINT3#

PPCI-X Bus

MUX

SPCI-X Slot

Intel

82544

Gigabit Ethernet