Technical Reference Guide For Compaq Evo D300/D500 Personal Computers and W4000 Workstations Covers Small Form Factor, Desktop, and Configurable Minitower Models Featuring the Intel Pentium 4 Processor and the 845 Chipset This document is designed to fit into a standard 3-ring binder. Provided below is a title block that can be copied and/or cut out and placed into a slip or taped onto the binder. Evo D300/D500 Personal Computers and W4000 Workstations TRG Featuring the Intel Pentium 4 Processor Technical Reference Guide NOTICE © 2002 Compaq Information Technologies Group, L.P. Compaq, the Compaq logo, Deskpro, and Evo are trademarks of the Compaq Information Technologies Group, L.P. iPAQ is a trademark of Compaq Information Technologies Group, L.P. in the United States and other countries. Microsoft, MS-DOS, Windows, Windows NT are trademarks of Microsoft Corporation in the United States and other countries. Intel, Pentium, Intel Inside, and Celeron are trademarks of Intel Corporation in the U. S. and/or other countries. The Open Group, Motif, OSF/1, UNIX, the "X" device, and IT DialTone are trademarks of The Open Group in the U. S. and other countries. All other product names mentioned herein may be trademarks of their respective companies. Compaq shall not be liable for technical or editorial errors or omissions contained herein. The information in this document is provided “as is” without warranty of any kind and is subject to change without notice. The warranties for Compaq products are set forth in the express limited warranty statements accompanying such products. Nothing herein should be construed as constituting an additional warranty. For more information regarding specifications and Compaq-specific parts please contact Compaq Computer Corporation. For more information regarding specifications and Compaq-specific parts please contact Compaq Computer Corporation. Technical Reference Guide for Compaq Evo D300/D500 Personal Computers and W4000 Workstations First Edition - April 2002 Second Edition – January 2003 Document Part Number 329001-001 Compaq Evo and Workstation Personal Computers i Featuring the Intel Pentium 4 Processor Second Edition - January 2003 Technical Reference Guide ii Compaq Evo and Workstation Personal Computers Featuring the Intel Pentium 4 Processor Second Edition –- January 2003 Technical Reference Guide TABLE OF CONTENTS CHAPTER 1 INTRODUCTION .................................................................................................................. 1.1 ABOUT THIS GUIDE ................................................................................................................ 1-1 1.1.1 ONLINE VIEWING............................................................................................................1-1 1.1.2 HARDCOPY ....................................................................................................................... 1-1 1.2 ADDITIONAL INFORMATION SOURCES............................................................................. 1-2 1.3 MODEL NUMBERING CONVENTION................................................................................... 1-2 1.4 SERIAL NUMBER ..................................................................................................................... 1-2 1.5 NOTATIONAL CONVENTIONS.............................................................................................. 1-3 1.5.1 VALUES ............................................................................................................................. 1-3 1.5.2 RANGES ............................................................................................................................. 1-3 1.5.3 REGISTER NOTATION AND USAGE ............................................................................ 1-3 1.5.4 BIT NOTATION AND BYTE VALUES ........................................................................... 1-3 1.6 COMMON ACRONYMS AND ABBREVIATIONS................................................................. 1-4 CHAPTER 2 SYSTEM OVERVIEW .......................................................................................................... 2.1 INTRODUCTION....................................................................................................................... 2-1 2.2 FEATURES AND OPTIONS...................................................................................................... 2-2 2.2.1 STANDARD FEATURES .................................................................................................. 2-2 2.2.2 OPTIONS ............................................................................................................................ 2-3 2.3 MECHANICAL DESIGN........................................................................................................... 2-4 2.3.1 CABINET LAYOUTS ........................................................................................................ 2-5 2.3.2 CHASSIS LAYOUTS......................................................................................................... 2-7 2.3.3 BOARD LAYOUTS ......................................................................................................... 2-10 2.4 SYSTEM ARCHITECTURE .................................................................................................... 2-12 2.4.1 INTEL PENTIUM 4 PROCESSOR.................................................................................. 2-14 2.4.2 CHIPSET........................................................................................................................... 2-15 2.4.3 SUPPORT COMPONENTS.............................................................................................. 2-15 2.4.4 SYSTEM MEMORY ........................................................................................................ 2-16 2.4.5 MASS STORAGE............................................................................................................. 2-16 2.4.6 SERIAL AND PARALLEL INTERFACES..................................................................... 2-16 2.4.7 UNIVERSAL SERIAL BUS INTERFACE...................................................................... 2-16 2.4.8 NETWORK INTERFACE CONTROLLER..................................................................... 2-16 2.4.9 GRAPHICS SUBSYSTEM............................................................................................... 2-17 2.4.10 AUDIO SUBSYSTEM...................................................................................................... 2-18 2.5 SPECIFICATIONS ................................................................................................................... 2-18 CHAPTER 3 PROCESSOR/MEMORY SUBSYSTEM............................................................................. 3.1 INTRODUCTION....................................................................................................................... 3-1 3.2 PENTIUM 4 PROCESSOR......................................................................................................... 3-2 3.2.1 PROCESSOR OVERVIEW................................................................................................ 3-2 3.2.2 PROCESSOR UPGRADING.............................................................................................. 3-4 3.3 MEMORY SUBSYSTEM........................................................................................................... 3-5 3.4 SUBSYSTEM CONFIGURATION............................................................................................ 3-8 Compaq Evo and Workstation Personal Computers iii Featuring the Intel Pentium 4 Processor Second Edition - January 2003 Technical Reference Guide CHAPTER 4 SYSTEM SUPPORT .............................................................................................................. 4.1 INTRODUCTION....................................................................................................................... 4-1 4.2 PCI BUS OVERVIEW ................................................................................................................ 4-2 4.2.1 PCI BUS TRANSACTIONS............................................................................................... 4-3 4.2.2 PCI BUS MASTER ARBITRATION................................................................................. 4-6 4.2.3 OPTION ROM MAPPING ................................................................................................. 4-7 4.2.4 PCI INTERRUPTS.............................................................................................................. 4-7 4.2.5 PCI POWER MANAGEMENT SUPPORT........................................................................ 4-7 4.2.6 PCI SUB-BUSSES .............................................................................................................. 4-7 4.2.7 PCI CONFIGURATION ..................................................................................................... 4-8 4.2.8 PCI CONNECTOR .............................................................................................................4-9 4.3 AGP BUS OVERVIEW ............................................................................................................ 4-10 4.3.1 BUS TRANSACTIONS.................................................................................................... 4-10 4.3.2 AGP CONFIGURATION ................................................................................................