This document provides information on the design, architecture, function, and
capabilities of the Compaq D315 and the HP d325 Personal Computers.
This information may be used by engineers, technicians, administrators, or
anyone needing detailed information on the products covered.
This document is designed for printout in the 8 ½- x 11-inch format. The title block
below may can be copied and/or cut out and placed into a slip or taped onto the binder.
HP, Hewlett-Packard, and the Hewlett-Packard logo are trademarks of the Hewlett-Packard Company in the U.S.
and other countries.
Compaq, the Compaq logo, and iPAQ are trademarks of Hewlett-Packard Development Company, L.P. in the U.S.
and other countries.
Microsoft, MS-DOS, Windows, Windows NT are trademarks of Microsoft Corporation in the United States and
other countries.
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Intel, Pentium, Intel Inside, and Celeron are trademarks of Intel Corporation in the U. S. and/or other countries.
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NOTE: Text set off in this manner provides information that may be helpful or may
require deserves special attention by the reader.
Technical Reference Guide
For the
Compaq D315 and hp d325 Personal Computers
Second Edition - April 2003
Document Part Number 322898-002
This guide provides technical information about Compaq D315 and the HP d325 personal
computers, both which feature the AMD Athlon XP processor and an NVidia NForce series
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 ONLINE VIEWING
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
URL listed below:
Viewing the file requires a copy of Adobe Acrobat Reader available at no charge from Adobe
Systems, Inc. at the following URL:
http://www.adobe.com
When viewing with Adobe Acrobat Reader, click on the ( ) icon or "Bookmarks" tab to
display the navigation pane for quick access to particular places in the guide.
1.1.2 HARDCOPY
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. Note that printing in black and white will lose
color shading used in some illustrations and tables.
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Chapter 1 Introduction
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:
♦ Hewlett-Packard Company: http://www.hp.com
♦ Advanced Micro Devices, Inc: http://www.amd.com
♦ NVIDIA Corporation: http://www.nvidia.com
♦ Standard Microsystems Corporation: http://www.smsc.com
♦ Texas Instruments Inc.: http://www.ti.com
♦ USB user group: http://www.usb.org
1.3 MODEL NUMBERING CONVENTION
Two model numbering conventions (one for Compaq, one for HP) are used for the systems
covered in this guide.
1.3.1 COMPAQ MODEL NUMBERING CONVENTION
The model numbering convention for Compaq systems is as follows:
XXX/XNN/NN/N/NNNx
Removable storage: b = CD/CDRW, c = CD, d = DVD, r = CDRW, z = ZIP
Memory (in MB)
OS type: 2 = Windows 2000, 6 = Dual install, Windows NT 4.0 or 2000,
8 = Windows 98SE, P = Dual install Windows XP Pro/2000
Hard drive size (in GB)
Processor speed (2 digits in GHz)
Processor type: A = AMD Athlon XP
Form factor: D = desktop, m = Microtower, C = Convertible minitower
Model: D3 = D300 series
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1.3.2 hp MODEL NUMBERING CONVENTION
The model numbering convention for HP systems is as follows:
dNNNsm/A2.06/NNNb+nyr/NNNX/XX1tNL
Technical Reference Guide
Security: Blank = mot included, L = Solenoid hood lock, K = TCPA chip, P = port control
NIC or Modem: N = NIC, M = modem, C = Combo N/M, Blank = integrated
Software Apps: o = Office XP Pro, t = Office XP Presonal, e = Office XP SBE
W = MS Word (EMEA only), u = MS Works 2003 (NA only)
OS: 1 – Linux, 2 = Win2000, 3 = XP Home, 4 = XP Pro
Graphics: Blank = integrated, v = DVI add in card, AA = GFrc2 MX200 64 MB,
AB = GFrc2 MX400 32 MB, AE = GFrc4 MX420 64 MB,
AF = Quadro4 200NVS, AG = Quadro4 400NVS,
AH = Quadro4 100NVS VGA, AJ = Quadro4 100NVA DVI,
AQ = GFrc4 MX440 64 MB
Memory speed: B = DDR266 single channel, C = DDR266 dual channel,
D = DDR333 single channel, E = DDR333 dual channel,
F = DDR400 single channel, G = DDR400 dual channel
Memory Amount: 3 digits, MB; 2 digits, GB
Removable storage: c = CD-ROM, d = DVD-ROM, q = DVD+RW, r = CDRW,
w = DVD/CDRW combo, z = ZIP drive, y = drive key,
n = no diskette drive, x = no removable storage, blank = diskette
nd
2
Hard drive (if installed)
Hard drive speed: a = 5400 rpm, b = 7200 rpm
Hard drive size (in GB)
Processor speed (2 or 3 digits in GHz)
Processor type: A = AMD Athlon XP
Form factor: D = desktop, m = Microtower, C = Convertible minitower
s = MS office software
Model: 325 = d325 series
1.4 SERIAL NUMBER
The unit’s serial number is located on a sticker placed on the exterior cabinet. The serial number
may also be read with the Compaq Diagnostics or Compaq Insight Manager utilities.
1.5 NOTATIONAL CONVENTIONS
The notational guidelines used in this guide are described in the following subsections.
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Chapter 1 Introduction
1.5.1 VALUES
Hexadecimal values are indicated by a numerical or alpha-numerical value followed by the letter
“h.” Binary values are indicated by a value of ones and zeros followed by the letter “b.”
Numerical values that have no succeeding letter can be assumed to be decimal unless otherwise
stated.
1.5.2 RANGES
Ranges or limits for a parameter are shown using the following methods:
Example A: Bits <7..4> = bits 7, 6, 5, and 4.
Example B: IRQ3-7, 9 = IRQ signals 3 through 7, and IRQ signal 9
1.5.3 REGISTER NOTATION AND USAGE
This guide uses standard Intel naming conventions in discussing the microprocessor’s (CPU)
internal registers. Registers that are accessed through programmable I/O using an indexing
scheme are indicated using the following format:
03C5.17h
Index port
Data port
In the example above, register 03C5.17h is accessed by writing the index port value 17h to the
index address (03C4h), followed by a write to or a read from port 03C5h.
1.5.4 BIT NOTATION AND BYTE VALUES
Bit designations are labeled between brackets (i.e., “bit <0 >”). Binary values are shown with the
most significant bit (MSb) on the far left, least significant bit (LSb) at the far right. Byte values in
hexadecimal are also shown with the MSB on the left, LSB on the right.
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Technical Reference Guide
1.6 COMMON ACRONYMS AND ABBREVIATIONS
Table 1-1 lists the acronyms and abbreviations used in this guide.
Table 1–1. Acronyms and Abbreviations
Table 1-1.
Acronyms and Abbreviations
Acronym/Abbreviation Description
A ampere
AC alternating current
ACPI Advanced Configuration and Power Interface
A/D analog-to-digital
ADC Analog-to-digital converter
ADD AGP digital display (card)
AGP Accelerated graphics port
API application programming interface
APIC Advanced Programmable Interrupt Controller
APM advanced power management
AOL Alert-On-LAN™
ASIC application-specific integrated circuit
AT 1) attention (modem commands) 2) 286-based PC architecture
ATA AT attachment (IDE protocol)
ATAPI AT attachment w/packet interface extensions
AVI audio-video interleaved
AVGA Advanced VGA
AWG American Wire Gauge (specification)
BAT Basic assurance test
BCD binary-coded decimal
BIOS basic input/output system
bis second/new revision
BNC Bayonet Neill-Concelman (connector type)
bps or b/s bits per second
BSP Bootstrap processor
BTO
CAS column address strobe
CD compact disk
CD-ROM compact disk read-only memory
CDS compact disk system
CGA color graphics adapter
Ch Channel, chapter
cm centimeter
CMC cache/memory controller
CMOS complimentary metal-oxide semiconductor (configuration memory)
Cntlr controller
Cntrl control
codec 1. coder/decoder; 2. compressor/decompressor
CPQ Compaq
CPU central processing unit
CRIMM Continuity (blank) RIMM
CRT cathode ray tube
CSM Compaq system management / Compaq server management
Built to order
Continued
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Chapter 1 Introduction
Table 1-1. Acronyms and Abbreviations Continued
Acronym/Abbreviation Description
DAC digital-to-analog converter
DC direct current
DCH DOS compatibility hole
DDC Display Data Channel
DDR Double data rate (memory)
DIMM dual inline memory module
DIN Deutche IndustriNorm (connector type)
DIP dual inline package
DMA direct memory access
DMI Desktop management interface
dpi dots per inch
DRAM dynamic random access memory
DRQ data request
DVI Digital video interface
EDID extended display identification data
EDO extended data out (RAM type)
EEPROM electrically eraseable PROM
EGA enhanced graphics adapter
EIA Electronic Industry Association
EISA extended ISA
EPP enhanced parallel port
EIDE enhanced IDE
ESCD Extended System Configuration Data (format)
EV Environmental Variable (data)
ExCA Exchangeable Card Architecture
FIFO first in / first out
FL flag (register)
FM frequency modulation
FPM fast page mode (RAM type)
FPU Floating point unit (numeric or math coprocessor)
FPS Frames per second
ft Foot/feet
GB gigabyte
GMCH Graphics/memory controller hub
GND ground
GPIO general purpose I/O
GPOC general purpose open-collector
GPU Graphics processing unit
GART Graphics address re-mapping table
GUI graphic user interface
h hexadecimal
HW hardware
hex hexadecimal
Hz Hertz (cycles-per-second)
ICH I/O controller hub
IDE integrated drive element
IEEE Institute of Electrical and Electronic Engineers
IF interrupt flag
I/F interface
IGP Integrated graphics processor
Continued
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Table 1-1. Acronyms and Abbreviations Continued
Acronym/Abbreviation Description
in inch
INT interrupt
I/O input/output
IPL initial program loader
IrDA Infrared Data Association
IRQ interrupt request
ISA industry standard architecture
Kb / KB kilobits / kilobytes (x 1024 bits / x 1024 bytes)
Kb/s kilobits per second
kg kilogram
KHz kilohertz
kV kilovolt
lb pound
LAN local area network
LCD liquid crystal display
LED light-emitting diode
LPC Low pin count
LSI large scale integration
LSb / LSB least significant bit / least significant byte
LUN logical unit (SCSI)
m Meter
MCH Memory controller hub
MCP Media communication processor
MMX multimedia extensions
MPEG Motion Picture Experts Group
ms millisecond
MSb / MSB most significant bit / most significant byte
mux multiplex
MVA motion video acceleration
MVW motion video window
n
variable parameter/value
NIC
NiMH nickel-metal hydride
NMI non-maskable interrupt
NRZI Non-return-to-zero inverted
ns nanosecond
NT nested task flag
NTSC National Television Standards Committee
NVRAM non-volatile random access memory
OS operating system
PAL 1. programmable array logic 2. phase alternating line
PC Personal computer
PCA Printed circuit assembly
PCI peripheral component interconnect
PCM pulse code modulation
PCMCIA Personal Computer Memory Card International Association
network interface card/controller
Continued
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Chapter 1 Introduction
Table 1-1. Acronyms and Abbreviations Continued
Acronym/Abbreviation Description
PFC Power factor correction
PIN personal identification number
PIO Programmed I/O
PN Part number
POST power-on self test
PROM programmable read-only memory
PTR pointer
RAM random access memory
RAS row address strobe
rcvr receiver
RDRAM (Direct) Rambus DRAM
RGB red/green/blue (monitor input)
RH Relative humidity
RMS root mean square
ROM read-only memory
RPM revolutions per minute
RTC real time clock
R/W Read/Write
SCSI small computer system interface
SDR Singles data rate (memory)
SDRAM Synchronous Dynamic RAM
SEC Single Edge-Connector
SECAM sequential colour avec memoire (sequential color with memory)
SF sign flag
SGRAM Synchronous Graphics RAM
SIMD Single instruction multiple data
SIMM single in-line memory module
SMART Self Monitor Analysis Report Technology
SMI system management interrupt
SMM system management mode
SMRAM system management RAM
SPD serial presence detect
SPDIF Sony/Philips Digital Interface (IEC-958 specification)
SPN Spare part number
SPP standard parallel port
SRAM static RAM
SSE Streaming SIMD extensions
STN super twist pneumatic
SVGA super VGA
SW software
Continued
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Table 1-1. Acronyms and Abbreviations Continued
Acronym/Abbreviation Description
TAD telephone answering device
TAFI Temperature-sensing And Fan control Integrated circuit
TCP tape carrier package
TF trap flag
TFT thin-film transistor
TIA Telecommunications Information Administration
TPE twisted pair ethernet
TPI track per inch
TTL transistor-transistor logic
TV television
TX transmit
UART universal asynchronous receiver/transmitter
UDMA Ultra DMA
URL Uniform resource locator
us / µs
USB Universal Serial Bus
UTP unshielded twisted pair
V volt
VAC Volts alternating current
VDC Volts direct current
VESA Video Electronic Standards Association
VGA video graphics adapter
VLSI very large scale integration
VRAM Video RAM
W watt
WOL Wake-On-LAN
WRAM Windows RAM
ZF zero flag
ZIF zero insertion force (socket)
microsecond
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Chapter 1 Introduction
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Technical Reference Guide
Chapter 2
SYSTEM OVERVIEW
2.Chapter 2 SYSTEM OVERVIEW
2.1 INTRODUCTION
The Compaq D315 and HP d325 personal computers (Figure 2-1) deliver outstanding
manageability, serviceability, and compatibility for enterprise environments. Based on the AMD
Athlon XP processor and an NVidia NForce Chipset, these systems emphasize performance along
with industry compatibility. These models feature an architecture incorporating the PCI bus. All
models are easily upgradeable and expandable to keep pace with the needs of the office enterprise.
Compaq D315
hp d325
Figure 2-1. Compaq D315 and hp d325 Personal Computers
This chapter includes the following topics:
♦ Features and options (2.2) page 2-2
♦ Mechanical design (2.3) page 2-4
♦ System architecture (2.4) page 2-8
♦ Specifications (2.5) page 2-14
Compaq D315 and hp d325 Personal Computers
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Second Edition - March 2003
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Chapter 2 System Overview
2.2 FEATURES AND OPTIONS
This section describes the standard features and available options.
2.2.1 STANDARD FEATURES
The following standard features are included on all models:
♦ AMD Athlon XP processor
♦ Three full-height, full-length PCI slots
♦ One AGP slot
♦ 3.5 inch, 1.44-MB diskette drive
♦ IDE controller w/UATA/100 mode support
♦ 5 drive bays (two internal 3.5”, two internal 5.25”, one 3.5” diskette drive)
♦ Hard drive fault prediction
♦ Communications interfaces including:
• One serial interface
• One parallel interface
• One network interface
• Six USB interfaces
♦ Plug ’n Play compatible (with ESCD support)
♦ Intelligent Manageability support
♦ Energy Star compliant
♦ Security features including:
• Serial/parallel port disable
♦ PS/2 Compaq Easy-Access keyboard w/Windows support
♦ PS/2 Compaq Scroll Mouse
♦ 220-watt Power Supply
♦ Available with Windows XP Home, XP Professional, or Mandrake Linux 8.2
Table 2-1 lists the differences between the Compaq D315 and hp d325 models.
Table 2-1. Feature Difference Matrix
Feature Difference Matrix
Feature Compaq D315 hp d325
DIMM type support (max) PC2100 DDR PC2700 DDR
Standard graphics controller Integrated GeForce2 MX Integrated GeForce 4 MX
AGP level of support 4X 8X
USB level of support 1.1 2.0
Multibay support? No Yes
Hood Sense/Hood Lock function? No Yes
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Table 2-1.
Technical Reference Guide
2.2.2 OPTIONS
The following items are available as options for all models and may be included in the standard
configuration of some models:
The following subsections describe the mechanical (physical) aspects of the Compaq D315 PC
and the HP Business PC d325 models.
CAUTION: Voltages are present within the system unit whenever the unit is plugged into a live AC outlet, regardless of the system's “Power On” condition. Always
!
disconnect the power cable from the power outlet and/or from the system unit
before handling the system unit in any way.
NOTE: The following information is intended primarily for identification purposes only. Before servicing these systems refer to the applicable Service Reference
Guide. Service personnel should review training materials also available on
these products.
2.3.1 CABINET LAYOUTS
2.3.1.1 Front Views
1
2
3
5
10
8
Compaq D315 hp d325
Item Description
1 CD-ROM drive headphone jack
2 CD-ROM drive volume control
3 CD-ROM drive activity LED
4 CD-ROM drive open/close button
5 1.44-MB diskette drive activity LED
6 1.44-MB diskette drive eject button
7 Microphone In Jack
8 Headphone Out Jack
9 Universal Serial Bus Connectors (2)
10 Power LED
11 Power Button
12 Hard Drive Activity LED
11
12
4
9
7
8
11
12
4
6
7
9
10
1
2
3
5
6
Figure 2-2. Cabinet Layout,Front Views
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