Introduction; System Overview; Diagram Of A Typical Intel® 460Gx Chipset-Based System With Agp - Intel 460GX Software Developer’s Manual

Introduction

This document provides information about the Intel® 460GX chipset components. The 460GX
chipset is a high performance memory and I/O chipset for the Intel Itanium™ processor, targeted
for multiprocessor server and high-end workstation designs.
This document describes the software programmer's interface to the 460GX chipset. It provides a
brief summary of the system architecture supported by the 460GX chipset, a list of features within
the chipset and a detailed description of software or other externally visible segments.
1.1

System Overview

The Intel 460GX chipset is a high performance chipset for Intel Itanium processor-based systems,
targeted for multiprocessor servers and high-performance workstations. It provides the memory
controller interface and appropriate bridges to PCI, AGP 4X, and other standard I/O buses.
Figure 1-1
Figure 1-1. Diagram of a Typical Intel® 460GX Chipset-based System with AGP
Intel® 460GX Chipset Software Developer's Manual
illustrates the basic system configuration of a four-processor platform.
C ache
P rocessor
SAC
S ystem A ddre ss
C on troller
Expander
Buses
GXB
G raphics
PXB
E xp ansion
PC I
B ridge
E xpan sion
Brid ge
C om patib ility
A G P
4X M ode
G AR T
S lot
S R A M
2 P C I Buses
3.3V /5.0V ,
32-bit, 33 M H z
WXB
W ide P C I
E xpansion
B ridge
2 P C I B uses
3.3V , 6 4-bit, 6 6 M H z
C ache C ache C ache
P rocessor Processor P rocesso r
Itanium™ Processor System Bus
P rivate Bu s
M A C M D C
M D C
M A C M D C M D C
M A C M D C M D C
M em ory S ubsystem M D C
M A C M D C
M em o ry S ubsystem
Memory Data and Control Bus
P ID
U S B
P rogram m able
In terru pt D evice
IFB
P C I Bu s
I/O and Firm w are
B ridge
Firm w a re
H ub Interface
FWH
S uper
Firm w are
I/O
H ub
SDC
S ystem D ata
C ontroller
ID E H D D
ID E C D -R O M
LP C Interface
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1-1