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Technical Reference Guide
Chapter 4
SYSTEM SUPPORT
4. Chapter 4 SYSTEM SUPPORT
4.1 INTRODUCTION
This chapter covers subjects dealing with basic system architecture and covers the following
topics:
♦ PCI bus overview (4.2) page 4-2
♦ AGP bus overview (4.3) page 4-10
♦ System resources (4.4) page 4-15
♦ System clock distribution (4.5) page 4-22
♦ Real-time clock and configuration memory (4.6) page 4-23
♦ System management (4.7) page 4-33
♦ Register map and miscellaneous functions (4.8) page 4-38
This chapter covers functions provided by off-the-shelf chipsets and therefore describes only basic
aspects of these functions as well as information unique to the systems covered in this guide. For
detailed information on specific components, refer to the applicable manufacturer’s
documentation.
Compaq Evo and Workstation Personal Computers
Featuring the Intel Pentium 4 Processor
Second Edition - January 2003
4-1