Technical Reference Guide www.hp.com 1-1
1
Introduction
1.1 A b o u t t h i s G u i d e
This guide provides technical information about HP Compaq dc7900 Business PC personal
computers that feature Intel processors and the Intel Q45 Express chipset. This document
describes in detail the system's design and operation for programmers, engineers, technicians,
and system administrators, as well as end-users wanting detailed information.
The chapters of this guide primarily describe the hardware and firmware elements and primarily
deal with the system board and the power supply assembly. The appendices contain general data
such as error codes and information about standard peripheral devices such as keyboards,
graphics cards, and communications adapters.
This guide can be used either as an online document or in hardcopy form.
1.1.1 O n l i n e V i ew i n g
Online viewing allows for quick navigating and convenient searching through the document. A
color monitor will also allow the user to view the color shading used to highlight differential
data. A softcopy of the latest edition of this guide is available for downloading in .pdf file format
at the following URL:
www.hp.com
Viewing the file requires a copy of Adobe Acrobat Reader available at no charge from Adobe
Systems, Inc. at the following URL:
www.adobe.com
1.1. 2 H a r d c o py
A hardcopy of this guide may be obtained by printing from the .pdf file. The document is
designed for printing in an 8 ½ x 11-inch format.
1.2 Additional Information Sources
For more information on components mentioned in this guide refer to the indicated
manufacturers' documentation, which may be available at the following online sources:
■ HP Corporation: www.hp.com
■
Intel Corporation: www.intel.com
■
Serial ATA International Organization (SATA-IO): www.serialATA.org.
■
USB user group: www.usb.org
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