Aopen AX4BMAX User Manual

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AX4B Max / AX4B U2

DOC. NO.: AX4BM-OL-E0201A

Overview

Installation

Hardware

Drivers &

Utilities

BIOS Setup

AWARD

Glossary

Troubleshooting &

Technical Support

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WWhhaatt’’ss iinn tthhiiss mmaannuuaall

AX4B Ma x / AX4B U2 .........................................................................................................................1

What’s in this manual......................................................................................................................................................2

You Must Notice..............................................................................................................................................................9

Before You Start............................................................................................................................................................ 10

Overview.......................................................................................................................................................................11

Feature Highlight ...........................................................................................................................................................12

Quick Installation Procedure .........................................................................................................................................16

Motherboard Map..........................................................................................................................................................17

Block Diagram ...............................................................................................................................................................18

Hard war e Ins tal lat ion .................................................................................................................. 19

About “Optional” and “Upgrade Optional”… ..................................................................................................................20

JP14 Clear CMOS Data ................................................................................................................................................21

CPU Installation ............................................................................................................................................................ 22

CPU Jumper-less Design ..............................................................................................................................................25

Full-range Adjustable CPU Core Voltage.......................................................................................................................27

CPU and System Fan Connector (with H/W Monit oring) ...............................................................................................29

JP28 Keyboard/Mouse Wake-up Enable/Disable Ju mper..............................................................................................30

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DIMM Sockets...............................................................................................................................................................31

Front Panel Connector..................................................................................................................................................33

ATX Power Connector ...................................................................................................................................................34

AC Power Auto Recovery.............................................................................................................................................. 3 5

IDE and Floppy Connector............................................................................................................................................36

IrDA Connector ............................................................................................................................................................. 38

AGP Expansion Slot and JP35 Voltage Adjustable Jumper...........................................................................................39

AGP Protection Technology........................................................................................................................................... 40

WOM (Zero Voltage Wake on Modem) Connector.........................................................................................................41

WOM by External BOX Modem .....................................................................................................................................42

WOM by Internal Modem Card......................................................................................................................................43

WOL (Wake on LAN).....................................................................................................................................................44

CNR (Communication and Network Riser) Expansi on Slot............................................................................................4 6

PC99 Color Coded Back Panel .....................................................................................................................................47

Support 2

Support USB2.0 Ports...................................................................................................................................................49

Chassis Intrusion Connector .........................................................................................................................................50

CD Audio Connector .....................................................................................................................................................51

AUX-IN Connector ........................................................................................................................................................52

, 3rd and 4

USB Ports................................................................................................................................4 8

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S/PDIF (Sony/Philips Digital Interface) Connector.........................................................................................................53

Super 5.1 Channel Audio Effect ....................................................................................................................................54

Onboard IEEE 1394 Controller (AX4B Max Only)..........................................................................................................55

Front Audio Connector .................................................................................................................................................. 5 6

Die-Hard BIOS(1 default, 1 optional) and JP30 Die-Hard BIOS Select Jumper .............................................................57

Dr. LED Connector ........................................................................................................................................................58

JP15/JP16 Dr. Voice Language Select Jumpers ...........................................................................................................60

JP1 Buzzer and JP2 Speaker Enable/ Dis able J umpers ................................................................................................61

Battery-less and Long Life Design ................................................................................................................................62

Over-current Protection................................................................................................................................................. 63

Hardware Monitoring.....................................................................................................................................................64

Resettable Fuse............................................................................................................................................................65

3300µF Low ESR Capacitor..........................................................................................................................................66

Layout (Frequency Isolation Wall).................................................................................................................................67

Enlarged Aluminum Heatsink ........................................................................................................................................68

Driver and Utility .........................................................................................................................6 9

Auto-run Menu from Bonus CD Disc .............................................................................................................................70

Installing Intel® Chipset Software Installat ion Utili ty...................................................................................................... 71

Installing Intel IAA Driver ............................................................................................................................................... 72

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Installing Onboard Sound Driver ...................................................................................................................................73

Installing Hardware Monitoring Uti lity............................................................................................................................74

Installing USB2.0 Driver................................................................................................................................................75

ACPI Suspend to Hard Drive......................................................................................................................................... 78

ACPI Suspend to RAM (STR)........................................................................................................................................82

AWARD BIOS ................................................................................................................................84

About BIOS Function Description… ..............................................................................................................................85

How To Use Award™ BIOS Setup P rogr am ..................................................................................................................86

How To Enter BIOS Set up.............................................................................................................................................88

BIOS Upgrade under Windows environment.................................................................................................................89

Overclocking................................................................................................................................91

VGA Card & Hard Disk ..................................................................................................................................................92

Glossary.......................................................................................................................................9 3

AC97.............................................................................................................................................................................93

ACPI (Advanced Configuratio n & Power Interfac e) .......................................................................................................93

AGP (Accelerated Graphic Port) ...................................................................................................................................93

AMR (Audio/Modem Riser)............................................................................................................................................94

AOpen Bonus Pack CD.................................................................................................................................................94

APM (Advanced Power Management) ...........................................................................................................................94

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ATA (AT Attachment) .....................................................................................................................................................94

ATA/66 ..........................................................................................................................................................................94

ATA/100 ........................................................................................................................................................................ 95

BIOS (Basic Input/Output Sys tem) ................................................................................................................................95

Bus Master IDE (DMA mode)........................................................................................................................................95

CNR (Communication and Networki ng Riser)................................................................................................................96

CODEC (Coding and Decoding)....................................................................................................................................9 6

DDR (Double Data Rated) SDRAM...............................................................................................................................96

DIMM (Dual In Line Memory Module)............................................................................................................................96

DMA (Direct Memory Access)........................................................................................................................................97

ECC (Error Checking and Correction) ...........................................................................................................................97

EDO (Extended Data Output) Memory ..........................................................................................................................97

EEPROM (Electronic Erasable Programmab le ROM) ....................................................................................................97

EPROM (Erasable Programmabl e ROM) ......................................................................................................................98

EV6 Bus........................................................................................................................................................................98

FCC DoC (Declaration of Conformity) ........................................................................................................................... 98

FC-PGA (Flip Chip-Pin Grid Array) ................................................................................................................................98

Flash ROM....................................................................................................................................................................99

FSB (Front Side Bus) Clock ..........................................................................................................................................99

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C Bus ..........................................................................................................................................................................99

IEEE 1394 ................................................................................................................................................................... 100

Parity Bit .....................................................................................................................................................................100

PBSRAM (Pipelined Burst S RAM)...............................................................................................................................100

PC-100 DIMM .............................................................................................................................................................101

PC-133 DIMM .............................................................................................................................................................101

PC-1600 or PC-2100 DDR DRAM...............................................................................................................................1 01

PCI (Peripheral Component Interface) Bus .................................................................................................................101

PDF Format.................................................................................................................................................................101

PnP (Plug and Play)....................................................................................................................................................102

POST (Power-On Self Test) ........................................................................................................................................102

RDRAM (Rambus DRAM) ........................................................................................................................................... 102

RIMM (Rambus Inline Memory Module) ......................................................................................................................102

SDRAM (Synchronous DRAM)....................................................................................................................................103

Shadow E

SIMM (Single In Li ne M emory Mod ule) ....................................................................................................................... 103

SMBus (System Management Bus).............................................................................................................................10 3

SPD (Serial Presence Detect )..................................................................................................................................... 104

Ultra DMA ...................................................................................................................................................................104

PROM........................................................................................................................................................ 103

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USB (Universal Serial B us) ......................................................................................................................................... 104

VCM (Virtual Channel Memory)................................................................................................................................... 105

ZIP file.........................................................................................................................................................................105

Troubleshooting.........................................................................................................................106

Technical Support .....................................................................................................................110

Product Registration ................................................................................................................. 11 3

How to Conta ct Us ....................................................................................................................114

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YYoouu MMuusstt NNoottiiccee

Adobe, the Adobe logo, Acrobat is trademarks of Adobe Systems Incorporated. AMD, the AMD logo, Athlon and Duron are trademarks of Advanced Micro Devices, Inc. Intel, the Intel logo, Intel Celeron, Pentium II, Pentium III are trademarks of Intel Corporation. Microsoft, Windows, and Windows logo are either registered trademarks or trademarks of Microsoft Corporation in the United

States and/or other countries. All product and brand names used on this manual are used for identification purposes only and may be the registered

trademarks of their respective owners.

All of the specifications and information contained in this manual are subject to change without notice. AOpen reserves the right to revise this publication and to make reasonable changes. AOpen assumes no responsibility for any errors or inaccuracies that may appear in this manual, including the products and software described in it.

This documentation is protected by copyright law. All rights are reserved. No part of this document may be used or reproduced in any form or by any means, or stored in a database or retrieval system without prior written permission from AOpen Corporation. Copyright

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BBeeffoorree YYoouu SSttaarrtt

This Online Manual will introduce you how this product is installed. All useful information will be described in later chapters. Please keep this manual carefully for future upgrades or system configuration changes. This Online Manual is saved in PDF

format, we recommend using Adobe Acrobat Reader 4.0 for online viewing, it is included in Bonus CD disc or you can get free

download from Adobe web site Although this Online Manual is optimized for screen viewing, it is still capable for hardcopy printing, you can print it by A4 paper

size and set 2 pages per A4 sheet on your printer. To do so, choose File > Page Setup and follow the instruction of your printer driver.

Thanks for the help of saving our earth.

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OOvveerrvviieeww

Thank you for choosing AOpen AX4B Max / AX4B U2 motherboard. AX4B Max / AX4B U2 is Intel® Socket 478 motherboard (M/B) based on the ATX form factor featuring the Intel Max / AX4B U2 motherboard can support Intel the AGP performance, it has one AGP slot which supports 1.5V AGP interface with 4x SBA/Data Transfer and 2x/4x Fast Write capability and pipelined spilt-transaction long burst transfer up to 1056MB/sec. According to different customer’s requirements, the Intel 845 chipset memory interface supports DDR SDRAM devices with densities of 64, 128, 256, 512Mb and 1Gb DDR SDRAM DIMM modules and the maximum memory size can be up to 2GB. The onboard IDE controller supports Ultra DMA 33/66/100 mode and the transfer rate up to 100MB/s. Further flexibility can be achieved by taking advantage of the

Communication and Network Riser (CNR)

LAN configuration on a single baseboard design. Besides, the AX4B Max / AX4B U2 has an AC97 performance and magic surround stereo sound to let people enjoy working with it. Now, let’s enjoy all features from AOpen AX4B Max / AX4B U2 motherboard.

845 (Brookdale) chipset. As high performance chipset built in the M/B, AX4B

Socket 478 Pentium® 4 (Brookdale) and 400 MHz Front Side Bus (FSB) clock. In

card that allows audio, modem, and/or

CODEC chipset onboard, providing high

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FFeeaattuurree HHiigghhlliigghhtt

CPU

Supports Intel® Socket 478 Pentium® 4 (Brookdale) 1.4GHz~2.4GHz+ with 400MHz Front Side Bus (FSB) designed for Socket 478 technology.

Chipset

With the Intel® 845 (Brookdale) chipset, Intel delivers a discrete graphics solution with all the performance, innovative features and proven reliability of the Intel AGP graphics solution for Intel make the most of soft audio/modem technology, the 845 chipset delivers an ideal solution for innovative new form factors.

845 chipset. With its highly scalable design, the new 845 chipset offers an ideal, leading-edge

Pentium® 4 processor platforms. With support for 5.1 channels of AC’97 audio and the ability to

Expansion Slots

Including six 32-bit/33MHz PCI, one CNR and one AGP 4X slots. The PCI local bus throughput can be up to 132MB/s. Please note that on AX4B Max, PCI 5 and PCI 6 slots are slave types and on AX4B U2, PCI 5 is slave. The Communication &

Nectworking Riser (CNR) slot provided from AX4B Max / AX4B U2 can support CNR interface for a Modem/Audio card. The Accelerated Graphics Port (AGP)

data transfer rate up to 1056MB/s. AX4B Max / AX4B U2 motherboard includes one 1.5V AGP expansion slot with 4x SBA/Data Transfer and 2x/4x Fast Write capability. For AD and SBA signaling, AX4B Max / AX4B U2 motherboard can support 4X mode.

specification provides a new level of video display sophistication and speed which supports

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Memory

Provides four 184-pin DDR SDRAM DIMM sockets that support up to 2GB of PC-200/266 compliant DDR SDRAM (Synchronous Dynamic Random Access Memory). You may install 64, 128, 256, 512Mb and 1Gb DDR SDRAM DIMM modules into each socket.

Ultra DMA 33/66/100 Bus Master IDE

Comes with an on-board PCI Bus Master IDE controller with two connectors that supports four IDE devices in two channels, supports Ultra DMA

33/66/100, PIO Modes 3 and 4 and Bus Master IDE DMA Mode 5, and supports Enhanced IDE devices.

On-board AC’97 Sound

AX4B Max / AX4B U2 uses ALC650 AC97 sound chip. This on-board audio supports 5.1 channel and includes a complete audio recording and playback system.

1MHz Stepping Frequency Adjustment

Provides “1MHz Stepping Frequency Adjustment” function in the BIOS. This magic function allows you adjust CPU FSB frequency from 100~248MHz by 1MHz stepping adjustment, and lets your system can get maximum performance.

Watch Dog Timer

Includes AOpen “Watch Dog Timer” function that can auto-reset system in 4.8 seconds when you fail to system overclocking.

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Die-Hard BIOS with external contro ller

The Die-Hard BIOS technology is an effective hardware protection method without any software or BIOS coding involved. Therefore, it is 100% virus free.

Eight USB ports

There are two connectors on the back panel and three USB headers on the board, providing you eight USB ports for USB interface devices, such as mouse, keyboard, modem, scanner, etc. Besides, the header USB3 and USB4 support USB2.0 with a faster speed of data transmission then the traditional USB.

Dr. LED

The Dr. LED has 8 LED lights on AX4B Max / AX4B U2 to easily show the problems you may encounter.

AGP Protection Technology

With AGP Protection Technology implemented, this motherboard will automatically detect the voltage of AGP card and prevent your chipsets from being burnt out.

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Dr. Voice

The Dr. Voice provides 4 language versions (English, Chinese, Japanese and German) that can easily tell you the problem you may encounter. Specially tailored made for users, we have defaulted the language versions of Japanese market to Japanese only in order to save users from the hassle of setting jumpers, and thus making motherboard a real jumper less design.

Power Management/Plug and Play

Supports the power management function that conforms to the power-saving standards of the U.S. Environmental Protection Agency (EPA) Energy Star program. It also offers Plug-and-Play system user-friendly.

, helping save users from configuration problems and makes the

Hardware Monitoring Management

Supports CPU or system fans’ status, temperature, voltage monitoring and alert through the on-board hardware monitor module.

Enhanced ACPI

The fully implemented ACPI standard is Windows® 98/ME/2000 series compatible; it also supports Soft-Off, STR (Suspend to RAM, S3), STD (Suspend to Disk, S4) features.

Super Multi-I/O

Provides two high-speed UART compatible serial ports and one parallel port with EPP and ECP capabilities. You can also connect UART from COM1 to an Infrared Module for wireless connection.

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QQuuiicckk IInnssttaallllaattiioonn PPrroocceedduurree

This page gives you a quick procedure on how to install your system. Follow each step accordingly.

1. Installing CPU and Fan

2. Installing System Memory (DIMM)

3. Connecting Front Panel Cable

4. Connecting IDE and Floppy Cable

5. Connecting ATX Power Cable

6. Connecting Back Panel Cable

7. Power-on and Load BIOS Setup Default

8. Setting CPU Frequency

9. Reboot

10. Installi ng O pe rat in g Sys tem (s uch as W ind ows 98 )

11. Installing Driver and Utility

BIOS

JP30 Die Hard BIOS Sel

JP15 & 16 D

per

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CD-IN Connecto

Front Audio Connecto

AUX-IN Connecto

SPDIF Connector

Onboard AC’97 CODEC

32-bit PCI Expansion Slot x6

(AX4B Max: PCI 5&6 Slave

JP35 AGP1.5V Adjustable

IEEE 1394 Connector x2

Front Panel Connector

JP14 CMOS Clear Jumper Chassis Intrusion Connector

CNR Expansion Slot

X4B U2: PCI 5 Slave)

Dr. LED Connecto

3rd and 4th USB Connectors

WOL Connecto IrDA Connector

Die Hard

(1 default, 1 optional)

(AX4B Max only)

2ndUSB Connecto

FAN3 Connecto

JP1 Buzzer Jumpe

FDD Connecto

ect

Jumper

Motherboard Map

PC99 Colored Back Panel Resettable Fuse

JP28 Keyboard/Mouse Wakeup Enable/Disable Jum

FAN2 Connector 4-pin 12V ATX Power Connector

3300μF Low ESR Capacitors

GP 4x Expansion Slot

(for 1.5V AGP card ) 478-pin CPU socket with Voltage

and Frequency Auto-detection supporting Intel

1.4~2.4GHz+ CPU

845 chipset (Brookdale)

Intel CPU Fan Connector with H/W Monitoring Function

184-pin DIMM Socket x4 supporting PC-200/266 DDR SDRAM

WOM Connector

Select Jumper

TX Power Connector TA/33/66/100

IDE Connector x2

r. Voice Language

Pentium® 4

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BBlloocckk DDiiaaggrraamm

Socket 478

Intel

Pentium 4

CPU

AGP 4X Slot

DIMM Socket x4

400MHz System

Bus

Floppy Disk Drive x2

PC-200/266 DDR

SDRAM Up to 2GB

Intel 845

82845

MCH

USB

Connector x4

PCI Bus

1stUSB Port

2ndUSB Port

3rdUSB Port

4thUSB Port

32-bit PCI Slot x6

ATA

33/66/100

Primary

Channel

Secondary

Channel

Intel

FW82801BA

ICH2

Low Pin

Count Super

I/O

AC97

CODEC

AC Link

Firmware Hub

4Mbit Flash EEPROM

Parallel Port

Serial Port x2

IDE Drive x4

CNR Slot

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HHaarrddwwaarree IInnssttaallllaattiioonn

This chapter describes jumpers, connectors and hardware devices of this motherboard.

Note: El ectrostatic discharge (ESD) can damage your processor, disk drives, expansion boards, and other components. Always observe the following precautions before you install a system component.

1. Do not remove a component from its protective packaging until you are ready to install it.

2. Wear a wrist ground strap and attach it to a metal part of the system unit before handling a component. If a wrist strap is not available, maintain contact with the system unit t hroughout any procedure requiring ESD protection.

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AAbboouutt ““OOppttiioonnaall”” aanndd ““UUppggrraaddee OOppttiioonnaall””……

When you r ead this onli ne manual and start to assemble your computer system, you may find some functions are “Optional”, and some “Upgrade Optional”. Although all AOpen motherboards include many amazing and powerful features, in some situations, those powerful features are not commonly used by every user. Therefore, we changed some key features to “Optional” for you to choose. With optional functions that can be upgraded by users, we define them “Upgrade Optional”. As for those optional functions that can’t be upgraded by ourselves, we call them “Optional”. If needed, you can contact our local distributors or resellers for purchasing “Upgrade Optional” components, and again you are welcomed to visit AOpen official web site: www.aopen.com

for more detail information.

(

)

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JJPP1144 CClleeaarr CCMMOOSS DDaattaa

You can clear CMOS to restore system default setting. To clear the CMOS, follow the procedure below.

1. Turn off the system and unplug the AC power.

2. Remove ATX power cable from connector PWR2.

3. Locate JP14 and short pins 2-3 for a few seconds.

4. Return JP14 to its normal setting by shorting pin1 & pin2.

5. Connect ATX power cable back to connector PWR2.

Normal

default

Pin 1

Clear

Tip: W hen should I Clear CMOS?

1. Boot fa il bec aus e of ov e rcl ock in g…

2. Forget password…

3. Troubleshooting…

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CCPPUU IInnssttaallllaattiioonn

This motherboard supports Intel® Pentium 4 Socket 478 series CPU (Brookdale). Be careful of CPU orientation when you plug it into CPU socket.

1. Pull up the CPU socket lever and up to 90-degree angle.

2. Locate Pin 1 in the socket and look for a cut edge on the CPU upper interface. Match Pin 1 and cut edge, then insert the CPU into the socket.

Note: Those pictures are for example only; it may not exactly be the same with your motherboard.

CPU socket

Lever

CPU pin 1 and

cut edge

CPU cut edge

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3. Press down the CPU socket lever and finish CPU installation.

Note: This picture is for example only; it may not exactly be the same with your motherboard.

CPU cut edge

Note: If you do not match the CPU socket Pin 1 and CPU cut edge well,

ou may damage the CPU.

Note: This socket supports Micro-FC-PGA2 package CPU, the latest CPU package developed by Intel. Other forms of CPU package are impossible to be fitted in.

Note: P4 CPU tends to produce highe temperature; for better heat dissipation, we recommend you to install this motherboard with a bigger housing. Besides, by doing so you can preven components from colliding.

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CCPPUU FFaann IInnssttaallllaattiioonn

This motherboard comes with a retention module attached on the CPU socket when shipped; we strongly recommend you to install AOpen special designed CPU Fan as shown below for better heat dissipation. Please install the CPU Fan according to the following procedures.

1. Gently put the CPU Fan down on the retention module with clips aligning correctly to the four corners.

2. Press down the four clips with force one by one on the retention module.

Clip

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CCPPUU JJuummppeerr--lleessss DDeessiiggnn

CPU VID signal and SMbus clock generator provide CPU voltage auto-detection and allows the user to set the CPU frequency through the BIOS setup designs are eliminated. There will be no worry of wrong CPU voltage detection.

, therefore no jumpers or switches are used. The disadvantages of the Pentium based jumper-less

Intel® Socket 478

Pentium 4 CPU

CPU VID signal

Power Regulator

(Automatically generates CPU voltage)

CPU Freq. Ratio

CPU voltage

Clock

Generator

BIOS

Controlled

Circuit

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AAOOppeenn ““WWaattcchh DDoogg TTiimmeerr””

AOpen provides a special and useful feature on this motherboard for overclockers. When you power-on the system, the BIOS will check last system POST CPU FSB reset the system to reboot in five seconds. Then, BIOS will detect the CPU’s default frequency and POST again. With this special feature, you can easily overclock your system to get a higher system performance without removing the system housing and save the hassle from setting the jumper to clear CMOS data when system hangs.

frequency according to user’s settings stored in the BIOS. If system failed in BIOS POST, the “Watch Dog Timer” will

AOpen

Watch Dog

Timer

status. If it succeeded, the BIOS will enable “Watch Dog Timer” function immediately, and set the

Enable/Disable Signal

from BIOS

Countdown about 5 seconds if fails in POST

Reset Signal

Clock Generator

BIOS

CPU ID Signal

CPU

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FFuullll--rraannggee AAddjjuussttaabbllee CCPPUU CCoorree VVoollttaaggee

This function is dedicated to overclockers and supports Adjustable CPU Core Voltage from 1.10V to 1.85V. However, this motherboard can also automatically detects CPU VID signal and generates proper CPU core voltage.

SSeettttiinngg CCPPUU FFrreeqquueennccyy

BIOS Setup > Frequency/Voltage Control > CPU Clock Setting

You can set CPU frequency through the BIOS setup, and no jumpers or switches are needed to be set.

CPU Ratio CPU FS B

Home

8x, 9x, 10x,…22x, 23x, 24x 100~248MHz by 1MHz stepping

Tip: If your system hangs or fails to boot because of overclocking, simply use <Home> key to restore the default setting or you can wait AOpen “Watch Dog Timer” to reset the system after five seconds and t he system will auto-detect hardwares again.

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Core Frequency = CPU FSB Clock * CPU Rati o PCI Clock = CPU FSB Clock / Clock Ratio

AGP Clock = PCI Clock x 2

CPU

Pentium 4

1.4G Pentium 4

1.5G Pentium 4

1.6G Pentium 4

1.7G Pentium 4

1.8G Pentium 4

1.9G Pentium 4

2.0G Pentium 4

2.2G Pentium 4

2.4G

CPU Core Frequenc

1400MHz 100MHz 400MHz 14x

1500MHz 100MHz 400MHz 15x

1600MHz 100MHz 400MHz 16x

1700MHz 100MHz 400MHz 17x

1800MHz 100MHz 400MHz 18x

1900MHz 100MHz 400MHz 19x

2000MHz 100MHz 400MHz 20x

2200MHz 100MHz 400MHz 22x

2400MHz 100MHz 400MHz 24x

FSB Clock

System Bus

Ratio

Warning: Intel® 845 chipset supports maximum 400MHz (100MHz*4) system bus and 66MHz AGP clock; higher clock setting may cause serious system damage.

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CCPPUU aanndd SSyysstteemm FFaann CCoonnnneeccttoorr ((wwiitthh HH//WW MMoonniittoorriinngg))

Plug in the CPU fan cable to the 3-pin CPU FAN connector. If you have chassis fan, you can also plug it on FAN2 ( without H/W Monitoring) or FAN3 connector.

FAN2 Connector

CPU Fan Connector

GND +12V SENSOR

FAN3 Connector

GND +12V SENSOR

Note: Some CPU fans do not have sensor pin, so that they cannot support hardware monitoring function.

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JJPP2288 KKeeyybbooaarrdd//MMoouussee WWaakkee--uupp EEnnaabbllee//DDiissaabbllee JJuummppeerr

This motherboard provides keyboard / mouse wake-up function. You can use JP28 to enable or disable this function, which could resume your system from suspend mode with keyboard or mouse. T he factory default setting is set to “Disable”(1-2), and you may enable this function by setting the jumper to 2-3.

JP28

KB/Mouse Wake-up

Disable

(Default)

Enable

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DDIIMMMM SSoocckkeettss

This motherboard has four 184-pin DDR DIMM sockets that allow you to install PC200 or PC266 memory up to 2 GB. Both ECC and Non-ECC DDR SDRAM are supported, but you can’t install them both on DIMM at the same time. Otherwise, serious damage on memory sockets or SDRAM module may be caused. Please note that double-side DDR SDRAM is not allowed to be installed on both DIMM1 and DIMM2 or DIMM 3 and DIMM4.

DIMM1 DIMM2 DIMM3 DIMM4

DIMM 1 DIMM 2

DIMM 3 DIMM 4

Single-Side

DDR SDRAM

V V

Suggested Installation

Double-Side

DDR SDRAM

Install ONLY on either

slots

Install ONLY on either

slots

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HHooww ttoo IInnssttaallll MMeemmoorryy MMoodduulleess

Please follow the procedure as shown below to finish memory installation.

1. Make sure the DIMM module’s pin face down and match the socket’s size as depicted below.

2. Insert the module straight down to the DIMM slot with both hands and press down firmly until the DIMM module is securely in place.

3. Repeat step 2 to finish additional DIMM modules installation.

Tab

40 pins 52 pins

Note: The ta bs of t he DIMM slot will close-up to hold the DIMM in place when the DIMM touches the slot’s bottom.

V+5V

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FFrroonntt PPaanneell CCoonnnneeccttoorr

Attach the power LED, Keylock, speaker, power and reset switch connectors t the corresponding pins. If you enable “Suspend Mode” item in BIOS Setup, th ACPI & Power LED will keep flashing while the system is in suspend mode.

Locate the power switch cable from your ATX housing. It is 2-pin female connector from the housing front panel. Plug this connector to the soft-power switch connector marked SPWR.

Suspend Type ACPI L E D

Power on Suspend (S2) or Suspend to RAM (S3) Flashing for every second

Suspend to Disk (S4) The LED will be turned off

IDE LED

Speaker

SPWR

CPI & PWR

LED

Reset

KEYLOC

SPEAKER

GND

+5 IDE LED IDE LED

GND

5VSB SPWR ACPILED GND ACPILED + NC NC GND RESET GND

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AATTXX PPoowweerr CCoonnnneeccttoorr

This motherboard comes with a 20-pin and 4-pin ATX power connector. Make sure you plug in the right direction. We strongly recommend you to connect the 4-pin 12V ATX connector before connecting the 20-pin ATX power connector and use standard power supply specially designed for Pentium 4 system.

Pin1

Ground 12V 12V

4-Pin 12V ATX Power Connector

COM COM

-5V +5V +5V

5VSB

PO-O

+12V

COM

+5V

20-Pin Power Connector

COM PS-ON COM

-12V +3.3V

+3.3V +3.3V COM +5V COM

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AACC PPoowweerr AAuuttoo RReeccoovveerryy

A traditional ATX system remains at power off stage when AC power resumes from power failure. This design is inconvenient for a network server or workstation without an UPS. This motherboard implements an AC Power Auto Recovery function to solve this problem.

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IIDDEE aanndd FFllooppppyy CCoonnnneeccttoorr

Connect 34-pin floppy cable and 40-pin IDE cable to floppy connector FDC and IDE connector. The blue connector is IDE1 for clear identification. Beware of the pin1 orientation. Wrong orientation may cause system damage.

Secondary

Master (3rd)

IDE 2 (Secondary)

IDE 1 (Primary)

Primary Master

(1st)

Pin 1

Secondary Slave (4th)

Primary

Slave (2nd)

Pin 1

ATA 33/66/100 IDE Connector

FDD Connector

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IDE1 is also known as the primary channel and IDE2 as the secondary channel. Each channel supports two IDE devices that make a total of four devices. In order to work together, the two devices on each channel must be set differently to Master and Slave mode. Either one can be the hard disk or the CDROM. The setting as master or slave mode depends on the jumper on your IDE device, so please refer to your hard disk and CDROM manual accordingly.

This motherboard supports ATA33 modes. The IDE bus is 16-bit, which means every transfer is two bytes.

Mode Clock Pe rio d Clock

PIO mode 0 30ns 20 600ns (1/600ns) x 2byte = 3.3MB/s PIO mode 1 30ns 13 383ns (1/383ns) x 2byte = 5.2MB/s PIO mode 2 30ns 8 240ns (1/240ns) x 2byte = 8.3MB/s PIO mode 3 30ns 6 180ns (1/180ns) x 2byte = 11.1MB/s PIO mode 4 30ns 4 120ns (1/120ns) x 2byte = 16.6MB/s DMA mode 0 30ns 16 480ns (1/480ns) x 2byte = 4.16MB/s DMA mode 1 30ns 5 150ns (1/150ns) x 2byte = 13.3MB/s DMA mode 2 30ns 4 120ns (1/120ns) x 2byte = 16.6MB/s ATA 33 30ns 4 120ns (1/120ns) x 2byte x2 = 33MB/s ATA 66 30ns 2 60ns (1/60ns) x 2byte x2 = 66MB/s ATA100 20ns 2 40ns (1/40ns) x 2byte x2 = 100MB/s

Warning: The specificat io n of the I DE c abl e is a max imu m of 46c m (1 8 inc hes ) ; make sure your cable does not exceed this length.

, ATA66 or ATA100 IDE devices. Following table lists the transfer rate of IDE PIO and DMA

Count

Cycle Time Data Transfer Rate

Tip:

1. For better signal quality, it is recommended to set the far end side device to master mode and follow the suggested sequence to install your new device. Please refer to above diagram

2. To achieve the best performance of Ultra DMA 66/100 hard disks, a special 80-wires IDE cable for Ultra DMA

1 i r

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IIrrDDAA CCoonnnneeccttoorr

The IrDA connector can be configured to support wireless infrared module, with this module and application software such as Laplink or Windows 95 Direct Cable Connection, user can transfer files to or from laptops, notebooks, PDA devices and printers. This connector supports HPSIR (115.2Kbps, 2 meters) and ASK-IR (56Kbps).

Install the infrared module onto the IrDA connector and enable the infrared function from BIOS Setup, UART Mode, make sure when you plug the IrDA connector in right orientation.

+5V

IR_T

IIrrDDAA CCoonnnneeccttoorr

KEY GND IR_RX

Pin 1

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AAGGPP EExxppaannssiioonn SSlloott aanndd JJPP3355 VVoollttaaggee AAddjjuussttaabbllee JJuummppeerr

The AX4B Max / AX4B U2 provides an AGP 4x slot. AGP 1x2x4x is a bus interface targeted for high-performance 3D graphic. AGP supports memory read/write operation and single-master single-slave one-to-one only. It uses both rising and falling edge of the 66MHz clock, for 2X AGP, the data transfer rate is 66MHz x 4bytes x 2 = 528MB/s. AGP is now moving to AGP 4x mode, 66MHz x 4bytes x 4 = 1056MB/s. And this AGP expansion slot support 1.5V AGP card only.

Pin 1

1.5V

(Default)

1.55V

1.6V

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AAGGPP PPrrootteeccttiioonn TTeecchhnnoollooggyy

With the outstanding R&D ability of AOpen and its specially developed circuit, AX4B Max / AX4B U2 implements a blend new technology to protect your motherboard from being damaged by over-voltaging of AGP card. When AGP Protection Technology is implemented, this motherboard will automatically detect the voltage of AGP card and prevent your chipsets from being burnt out. Please note that if you install a AGP card with 3.3V, which is not supported by Intel i845, the LED3 will light up to warn you the possible damage of the exceeding voltage. You may contact your AGP card vendor for further support.

Warning: It is strongly recommended not to install a AGP card with 3.3V, which is not supported by Intel i845. When you do so, the LED3 will light up to warn you the

ossible damage.

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WWOOMM ((ZZeerroo VVoollttaaggee WWaakkee oonn MMooddeemm)) CCoonnnneeccttoorr

TThhiiss mmootthheerrbbooaarrdd iimmpplleemmeennttss ssppeecciiaall cciirrccuuiitt ttoo ssuuppppoorrtt WWaakkee OOnn MMooddeemm;; bbootthh IInntteerrnnaall mmooddeemm ccaarrdd aanndd eexxtteerrnnaall bbooxx mmooddeemm aarree ssuuppppoorrtteedd.. SSiinnccee IInntteerrnnaall mmooddeemm ccaarrdd ccoonnssuummeess nnoo ppoowweerr wwhheenn ssyysstteemm ppoowweerr iiss ooffff,, iitt iiss rreeccoommmmeennddeedd ttoo uussee aann iinntteerrnnaall mmooddeemm.. TToo uussee iinntteerrnnaall mmooddeemm,, ccoonnnneecctt 44--ppiinn ccaabbllee ffrroomm RRIINNGG ccoonnnneeccttoorr ooff mmooddeemm ccaarrdd ttoo WWOOMM ccoonnnneeccttoorr oonn tthhee mmootthheerrbbooaarrdd..

Pin 1

+5VSB

WOM Connector

RI-

GND

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WWOOMM bbyy EExxtteerrnnaall BBOOXX MMooddeem

TTrraaddiittiioonnaall GGrreeeenn PPCC ssuussppeenndd mmooddee ddooeess nnoott rreeaallllyy ttuurrnn ooffff tthhee ssyysstteemm ppoowweerr ssuuppppllyy,, iitt uusseess eexxtteerrnnaall bbooxx mmooddeemm ttoo ttrriiggggeerr MMBB CCOOMM ppoorrtt aanndd rreessuummee bbaacckk ttoo aaccttiivvee..

Note: This picture is for example only; it may not be exactly the same as the motherboard you purchased.

Serial Port

(Modem Side)

Pin 1

Serial Port

(Motherboard Side)

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WWOOMM bbyy IInntteerrnnaall MMooddeemm CCaarrd

WWiitthh tthhee hheellpp ooff tthhee AATTXX ssoofftt ppoowweerr OOnn//OOffff,, iitt iiss ppoossssiibbllee ttoo hhaavvee aa ssyysstteemm ttoottaallllyy ppoowweerr ooffff,, aanndd wwaakkeeuupp ttoo aauuttoommaattiiccaallllyy aannsswweerr aa pphhoonnee ccaallll aass aann aannsswweerriinngg mmaacchhiinnee oorr ttoo sseenndd//rreecceeiivvee aa ffaaxx.. YYoouu mmaayy iiddeennttiiffyy wwhheetthheerr oorr nnoott yyoouurr ssyysstteemm iiss iinn ttrruuee ppoowweerr ooffff mmooddee bbyy cchheecckkiinngg ttoo sseeee iiff tthhee ffaann ooff yyoouurr ppoowweerr ssuuppppllyy iiss ooffff.. BBootthh aann eexxtteerrnnaall bbooxx mmooddeemm aanndd aann iinntteerrnnaall mmooddeemm ccaarrdd ccaann bbee uusseedd ttoo ssuuppppoorrtt MMooddeemm WWaakkee UUpp,, bbuutt iiff yyoouu uussee aann eexxtteerrnnaall mmooddeemm,, yyoouu hhaavvee ttoo lleeaavvee yyoouurr bbooxx mmooddeemm oonn..

Note: This picture is for example only; it may not be exactly the same as the motherboard you purchased.

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WWOOLL ((WWaakkee oonn LLAANN))

This feature is very similar as Wake On Modem, but it goes through local area network. To use Wake On LAN function, you must have a network card with a chipset supporting this feature, and connect a cable from LAN card to motherboard WOL connector. The system identification information (probably IP address) is stored on network card and because there is a lot of traffic on the Ethernet, you need to install network management software, such as ADM, for the checking of how to wake up the system. Note that, at least 600mA ATX standby current is required to support the LAN card for this function.

WWOOLL CCoonnnneeccttoorr

LID GND +5VSB

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WOL Connector

(Motherboard Side)

Note: This picture is for example only; it may not exactly be the same motherboard as you purchased.

WOL Connector

(Ethernet Card Side)

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CCNNRR ((CCoommmmuunniiccaattiioonn aanndd NNeettwwoorrkk RRiisseerr)) EExxppaannssiioonn SSlloott

CNR is a riser card specification to replace the AMR (Audio/Modem Riser) that supports V.90 analog modem, multi-channel

audio, and phone-line based networking. Owing to CPU computing power getting stronger, the digital processing job can be implemented in main chipset and share CPU power. The analogy conversion (CODEC) circuit requires a different and separate circuit design, which is put on CNR card. This motherboard implements sound CODEC on board, but reserve CNR slot for the option of modem function. Note that you can still use PCI modem card.

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PPCC9999 CCoolloorr CCooddeedd BBaacckk PPaanneell

The onboard I/O devices are PS/2 Keyboard, PS/2 Mouse, COM1 and COM2, Printer, four USB, AC97 sound and game ports. The view angle of drawing shown here is from the back panel of the housing.

PS/2 Mouse

Connector

SPP/EPP/ECP

Parallel Port

MIDI/Game Port

PS/2 Keyboard: For standard keyboard, which is using a PS/2 plug. PS/2 Mous e: For PC-Mo us e, whic h is us in g a PS/ 2 pl ug. USB Port: Available for connecting USB devices. Parallel Port: To co nnect wit h SP P/ECP/ EPP pr int er. COM1/COM2 Port: To connect with pointing devices, modem or others serial devices. Speaker Out: To External Speaker, Earphone or Amplifier. Line-In: Comes from the signal sources, such as CD/Tape player. MIC-In: From Microphone. MIDI/Game Port: For 15-pin PC joystick, game pad or MIDI devices.

PS/2 Keyboard

Connector

USB

Connectors

COM 1 Port COM 2 Port

MIC-In Line-In Speaker Out

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nndd

SSuuppppoorrtt 2

This motherboard provides eight USB ports to connect USB devices such as mouse, keyboard, modem, printer, etc. There are two connectors on the PC99 back panel. You can use proper cables to connect USB devices from PC99 back panel or connect

USB2 header to the front panel of chassis. Please note that both USB3 and USB4 connectors support USB 2.0 function which

we will introduce in next section.

USBPWR0

USB_FP_P0-

USB_FP_P0+

1 2

GND

KEY

rrd

,, 3

aanndd 4

USBPW R0 USB_FP_P1-

USB_FP_P1+ GND USB_FP_OC0

Pin 1

tth

UUSSBB PPoorrttss

USB2 Connector

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SSuuppppoorrtt UUSSBB22..00 PPoorrttss

Compared to traditional USB 1.0/1.1 with the speed of 12Mbps, USB 2.0 has a fancy speed up to 480Mbps which is 40 times faster than the traditional one. Except for the speed increase, USB 2.0 supports old USB 1.0/1.1 software and peripherals, offering impressive and even better compatibility to customers. On this motherboard, USB3 and USB4 connectors support USB

2.0 function. To connect those two headers, you have to use proper USB cables and connect them to any USB models.

USB_FP_P0+

USB_FP_P0-

Pin 1

USBPWR0

GND

KEY

USB3 and USB4 Connector

1 2

USBPW R0 USB_FP_P1-

USB_FP_P1+ GND USB_FP_OC0

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CChhaassssiiss IInnttrruussiioonn CCoonnnneeccttoorr

The “CASE OPEN” header provides chassis intrusion-monitoring function. To make this function works, you have to enable it in the system BIOS, connect this header to a sensor somewhere on the chassi s. So, whenever the s ensor is triggered by lights or by the opening of the chassis, the system will beep to inform you. Please be informed that this useful function only applies to advanced chassis, you may purchase an extra sensor, attach it on your chassis, and make a good use of this function.

Sensor GND

IInnttrruussiioonn SSeennssoorr

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CCDD AAuuddiioo CCoonnnneeccttoorr

This connector is used to connect CD Audio cable from CDROM or DVD drive to onboard sound.

CCDD--IINN CCoonnnneeccttoorr

RGND GND

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AAUUXX--IINN CCoonnnneeccttoorr

This connector is used to connect MPEG Audio cable from MPEG card to onboard sound.

UUXX--IINN CCoonnnneeccttoorr

L GND GND R

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SS//PPDDIIFF ((SSoonnyy//PPhhiilliippss DDiiggiittaall IInntteerrffaaccee)) CCoonnnneeccttoorr

S/PDIF (Sony/Philips Digital Interface) is a latest audio transfer file format that provides impressive quality through optical fiber and allows you to enjoy digital audio instead of analog. Normally there are two S/PDIF outputs as shown, one for RCA connector, the most common one used for consumer audio products, and the other for optical connector with a even better audio quality. Through a specific audio cable, you can connect the SPDIF connector to a S/PDIF audi o module bearing S/PDIF digital output. However, you must have a S/PDIF supported speaker with SPDIF digital input to make the most of this function.

Connecting to

Optical Cable

SPDIFIN

GND

+5V

NC SPDIFOUT

udio cable

SPDIF Module

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SSuuppeerr 55..11 CChhaannnneell AAuuddiioo EEffffeecctt

This motherboard comes with an ALC650 Codec which supports high quality of 5.1 Channel audio effect, bringing you a brand new audio experience. On the strength of the innovative design of ALC650, you're able to use standard line-jacks for surround audio output without connecting any external module. To apply this function, you have to install the audio driver in the Bonus Pack CD as well as an audio application supporting 5.1 Channel. Picture bellow represents the standard location of all speakers in 5.1 Channel sound track. Please connect the plug of your front speakers to the green “Speaker out” port, rear speakers’ plug to the blue “Line in” port and both of the center and subwoofer speakers to the red “MIC in” port.

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OOnnbbooaarrdd IIEEEEEE 11339944 CCoonnttrroolllleerr ((AAXX44BB MMaaxx OOnnllyy))

This motherboard has an IEEE 1394 controller and two IEEE 1394 ports onboard. The IEEE 1394 provides data transfer rate up to 400Mb/s, and USB just has 12Mb/s. Hence, the IEEE 1394 interface can connect with the devices that need high data transferring performance, such as digital camera, scanner or others IEEE 1394 devices. Please use the proper cable to connect with devices.

IEEE 1394

Connector 1

IEEE 1394

Connector 2

+12V(F used)

TPA+

GND

TPB+

1 2

TPAGND TPB+12V(F used) SHIED GN D

’

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FFrroonntt AAuuddiioo CCoonnnneeccttoorr

If the housing has been designed with an audio port on the front panel, you’ll be able to connect onboard audio to front panel through this connector. By the way, pl ease remove the jumper cap from the Front Audio Connector before you connect the cable. Do not remove this yellow jumper cap if your housing doesn’t have an audio port on the front panel.

Pin 1

MICIN1 MICIN2

PHONE_R

PHONE_L

1 2

GND +5V SP-OUT R SP-OUT L NC

9 10

Note: Please remove the jumper cap from the front audio connector before you connect the cable. Do not remove this yellow jumper cap if your housing doesn

t have an audio port on the front panel.

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DDiiee--HHaarrdd BBIIOOSS((11 ddeeffaauulltt,, 11 ooppttiioonnaall)) aanndd JJPP3300 DDiiee--HHaarrdd BBIIOOSS SSeelleecctt JJuummppeerr

Many viruses have been found that may destroy bios code and data area lately. This motherboard implements a very effective hardware protection method without any software or BIOS coding involved, therefore it is 100% virus free. You may restore the originally mounted BIOS with 2nd BIOS ROM by setting JP30 to pin 2-3 if it fails to act normally. This motherboard comes with one BIOS ROM, you may contact our local distributors or resellers for purchasing an extra BIOS ROM. Please visit our website:

www.aopen.com

1 1

normal

for details.

rescue

Pin1

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DDrr.. LLEEDD CCoonnnneeccttoorr

Connecting Dr. LED you can easily find the system problems that may occur while assembling. It can clearly indicate whether the problem is caused from components or improper installation through the 8 LED lights of Dr. LED on the front panel. That is to say you can diagnose your system status quickly.

Pin 1

3.3V

GND

1 2

GPO18 GPO19 GPO20

5 6

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Dr. LED is a CD disc storage box with 8 LEDs on its front panel, the size of Dr. LED is exactly the same as 5.25 in floppy drive, so that it can be mount into normal 5.25 in drive bay of any housing.

The total 8 LEDs light up alternatively if the system fails in one of eight stages. Once the LED7 (latest LED) is lit, this indicates that the system has completed its boot-up procedure. The 8 LEDs indicate the following messages when lit:

LED 0 - Indicates that the CPU may have been installed incorrectly or is damaged. LED 1 - Indicates that the memory may have been installed incorrectly or is damaged. LED 2 - Indicates that the AGP may have been installed incorrectly or is damaged. LED 3 - Indicates that the PCI card may have been installed incorrectly or is damaged. LED 4 - Indicates that the floppy disk drive may have been installed incorrectly or is damaged. LED 5 - Indicates that the HDD may have been installed incorrectly or is damaged. LED 6 - Indicates that the keyboard may have been installed incorrectly or is damaged. LED 7 - Indi ca tes th at t he sy st em is OK.

76 543210

Boot O.K. KB HDD

Floppy

CPUVideo MemoryPCI

Note: During POST (Power On Self Test) procedure, the Debug LED will light on sequentially from LED0 to LED7 until the system boot O.K

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JJPP1155//JJPP1166 DDrr.. VVooiiccee LLaanngguuaaggee SSeelleecctt JJuummppeerrss

Dr. Voice is a great feature of AX4B Max / AX4B U2, which can identify the problems you may encounter in the operating system. It can clearly “tell you” whether the problem is caused from components or improper installation such as CPU, memory module, VGA, PCI add-on card, FDD, HDD or keyboard. Dr. Voice provides four language versions: English, German, Japanese and Chinese. You can select your preferred language by JP15 & JP16 jumpers. However, if you want to disable this function, you may also adjust both JP1 and JP2 and set them to pin 2-3 to disable the buzzer and speaker from making out voices.

JP16

JP15 Pin 1

German

JP15 Pin 1

Dr. Voice Language

Chinese Japanese

Select Jumper

English

(Default)

JP16 Pin 1

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JJPP11 BBuuzzzzeerr aanndd JJPP22 SSppeeaakkeerr EEnnaabbllee//DDiissaabbllee JJuummppeerrss

This motherboard comes with another considerate option that allows you to turn off the voice from buzzer and speaker. You can choose not to be bothered by the warning made from Dr. Voice when it detects any error in operating system. To disable this function, set JP1 and JP2 to pin 2-3 to stop both the buzzer and speaker from sending out voices.

Enable (Default)

JP1 (Buzzer)

Disable

JP2 (Speaker)

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Auto Switch

RTC

CMOS

Battery ATX Stand-by Power

uto switching to ATX standby power as long as AC power line is plugged. This smart design increases battery life if you still plug battery on motherboard.

Backup by EEPROM

BBaatttteerryy--lleessss aanndd LLoonngg LLiiffee DDeessiiggnn

This Motherboard implements a Flash ROM and a special circuit that provide you no batter power consumption of current CPU and CMOS Setup configurations. The RTC (real time clock) can also keep running as long as the power cord is plugged. If you lose your CMOS data by accident, you can just reload the CMOS configurations from Flash ROM and the system will recover as usual.

Flash

ROM

(Real Time Clock)

00:00:00

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OOvveerr--ccuurrrreenntt PPrrootteeccttiioonn

The Over Current Protection is a popular implementation on ATX 3.3V/5V/12V switching power supply. However, the new generation CPU uses different voltage with a regulator to transfer 5V to CPU voltage (for example, 2.0V), and thus makes 5V over current protection useless. This motherboard is with switching regulator onboard supporting CPU over-current protection; in conjunction with 3.3V/5V/12V power supply provide the full line over-current protection.

Note: Although we have implemented protection circuit and tried to prevent any human operating mistake, certain risks might still happen when CPU, memory, HDD or add-on cards installed on this motherboard is damaged due to component failure, human operating error or other unknown natural reasons. AOpen cannot guarantee that the protection circuit will always work

erfectly.

ATX

Switching

Power

Supply

12V (Protected by power supply)

3.3V (Pr ot ec ted by pow er sup pl y)

5V (Protected by power supply)

Onboard

Power

Regulator

Over-Current

Protection

Circuit

CPU Core Voltage

AAXX44BB MMaaxx // AAXX44BB UU22 OOnnlliinnee MMaannuuaall

HHaarrddwwaarree MMoonniittoorriinngg

This motherboard implements a hardware monitoring system. As you turn on your system, this smart design will monitor your system’s working voltage, fan status and CPU temperature. If any of those systems’ status goes wrong, there will be an alarm through the chassis external speaker or buzzer of motherboard (if having this function and enabled) to warn the user.

Fan

CPU

Power

Fan Speed

CPU Temperature

CPU Voltage

System Voltage

Detection

Circuit

AOpen H/W

Monitoring

Utility

AAXX44BB MMaaxx // AAXX44BB UU22 OOnnlliinnee MMaannuuaall

RReesseettttaabbllee FFuussee

Traditional motherboard uses fuses to prevent Keyboard and USB port from over-current or shortage. These fuses are soldered onboard that when it is broken (function to protect motherboard), user cannot replace them and result in malfunction of motherboard.

With expensive Resettable Fuse, the motherboard can be resumed back to normal function even after the fuse had done its protection job.

Resettable

Fuse

AAXX44BB MMaaxx // AAXX44BB UU22 OOnnlliinnee MMaannuuaall

3333000

The quality of low ESR capacitor (Low Equivalent Series Resistance) during high frequency operation is very important for the stability of CPU power. The idea of where to put these capacitors is another know-how that requires experience and detail calculation.

Moreover, AX4B Max / AX4B U2 implements 2200μF capacitors that have much larger capacity than normal capacitor (1000 and 1500μf) and provide better stability for CPU power.

μμμμ

FF LLooww EESSRR CCaappaacciittoorr

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LLaayyoouutt ((FFrreeqquueennccyy IIssoollaattiioonn WWaallll))

Note: This diagram for example only; it may not be exactly the same as the motherboard you purchased.

For high frequency operation, especially when overclocking, layout is the most important factor to make sure both chipset and CPU are working in stable condition. The layout of this motherboard implements

Open’s unique design called “Frequency Isolation Wall”. Separating each critical portion of motherboard into regions, where each region operates in a same or similar frequency range, we can avoid cross talk and frequency interference between each region’s operations and condition. The trace length and route must be calculated carefully. For example, the clock trace must be equal to length (not necessarily as short as possible) so that clock skew will be controlled within few a pico second (1/10

Sec)

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EEnnllaarrggeedd AAlluummiinnuumm HHeeaattssiinnkk

Cool down CPU and Chipset are important for system reliability. Enlarged aluminum heat sink provides better heat consumption especially when you are trying to over-clock the CPU.

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DDrriivveerr aanndd UUttiilliittyy

There are motherboard drivers and utilities included in AOpen Bonus CD disc. You don’t need to install all of them in order to boot your system. But after you finish the hardware installation, you have to install your operation system first (such as Windows

98) before you can install any drivers or utilities. Please refer to your operation system’s installation guide.

Note: Please follow recommended procedure to install Windows 95

and Windows 98.

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AAuuttoo--rruunn MMeennuu ffrroomm BBoonnuuss CCDD DDiisscc

You can use the auto-run menu of Bonus CD disc. Choose the utility and driver and select model name.

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IInnssttaalllliinngg IInntteell®® CChhiippsseett SSooffttwwaarree IInnssttaallllaattiioonn UUttiilliittyy

Windows 95/98 cannot recognize this chipset, because they were released earlier than Intel 845 chipset. You can install the Intel INF Update Utility from the Bonus Pack CD disc auto-run menu to eliminate the “?” marks.

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IInnssttaalllliinngg IInntteell IIAAAA DDrriivveerr

You can install Intel IAA Driver to increase the performance of software applications and reduce PC boot times. You can find it in the AOpen Bonus Pack

CD.

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IInnssttaalllliinngg OOnnbbooaarrdd SSoouunndd DDrriivveerr

This motherboard comes with ALC650 AC97 CODEC. This audio driver supports Windows 98SE and upper Windows OS; you can find the audio driver from the Bonus Pack CD disc auto-run menu.

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IInnssttaalllliinngg HHaarrddwwaarree MMoonniittoorriinngg UUttiilliittyy

You can install Hardware Monitoring Utility to monitor CPU temperature, fans and system voltage. The hardware monitoring function is automatically implemented by the BIOS and utility software. No hardware installation is needed.

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IInnssttaalllliinngg UUSSBB22..00 DDrriivveerr

This motherboard comes with USB2.0 function. You can install USB2.0 Driver under Windows 98SE, Windows ME, Windows 2000 and Windows XP from the Bonus Pack CD disc auto-run menu.

Under Windows ME System

1. After installing the USB 2.0 controller, boot system.

2. The "Add New Hardware Wizard" will appear, informing you that it has found a "PCI Universal Serial Bus."

3. Click on "Next," and from the generated list box, choose "Specify the location of the driver (Advanced)."

4. Click on "Next," and from the generated choices, choose "Specify a location."

5. Insert the Bonus CD in CD-ROM.

6. Type "[CD-ROM]:\Driver\USB2.0" in the text box that appears.

7. Click on "Next." A message informing you that Windows Me has found "AOpen USB Enhanced Host Controller" should appear.

8. Click on "Next," and then on "Finish."

9. Choose "Yes" when asked if you want to restart your computer.

******************************************** Confirming Driver Installation in Windows Me ******************************************** To confirm that the driver has been properly loaded in Windows Me, perform the following steps:

1. Choose "Setting s" f r om t h e "Start " menu.

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2. Choose "Control Panel," and then double-click on the "System" icon.

3. Choose the "Device Manager" tab, and then click the "+" in front of "Universal Serial Bus Controllers." "AOpen USB Enhanced Host Controller" should appear.

Under Windows 2000 System

After enabling the USB 2.0 controller and rebooting your system, Windows 2000 setup will show a "New Hardware Found" dialog box. Under Windows 2000, "Universal Serial Bus (USB) Controller" will be displayed.

1. Choose "Search for a suitable driver for my device (Recommended)". from the list, and then press "Enter".

2. Choose "Specify a location." and then press "Next"

3. Insert the Bonus CD in CD-ROM.

4. Type "[CD-ROM]:\Driver\USB2.0" in the text box that appears. Press " OK ".

5. Click on "Next." A message informing you that Windows has found "AOpen USB Enhanced Host Controller" should appear.

6. Click on "Next," and then on "Finish."

************************************ Confirming Windows 2000 Installation ************************************

1. From Windows 2000, open the Control Panel from "My Computer" followed by the System icon.

2. Choose the "Hardware" tab, and then click the "Device Manager" tab.

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3. Click t he "+" in front of " Universal Serial Bus c ontrollers". "AOpen USB Enhanced Host Controller" should appear.

Under Windows XP System

After enabling the USB 2.0, Windows XP setup will show a "Found New Hardware" dialog box. Under Windows XP, "Universal Serial Bus (USB) Controller" will be displayed.

1. Click on "Next," and from the generated list box, choose "Install from a list or special location (Advanced)", click "Next"

2. Click on "Next," and from the generated choices, choose "Include this location in the search:"

3. Insert the Bonus CD in CD-ROM.

4. Type "[CD-ROM]:\Driver\USB2.0" in the text box that appears.

5. Click on "Ne xt." A message informing you that Windows XP has found "AOpen USB Enhanced Host Controller" should appear.

6. When the Ne w Ha rdwa re W izar d has fi ni sh ed in sta ll in g th e USB dr ive r, click on "Fi nis h"

********************************** Confirming Windows XP Installation **********************************

1. From Windows XP, open the Control Panel from "My Computer".

2. Click on "Performance and maintenance".

3. Click on the "System" icon.

4. Choose the "Hardware" tab, and then click the "Device Manager" tab.

5. Click t he "+" in front of " Universal Serial Bus Controllers". "AOpen USB Enhanced Host Controller" should appear.

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AACCPPII SSuussppeenndd ttoo HHaarrdd DDrriivvee

ACPI Suspend to Hard Drive is basically controlled by Windows operation system. It sa ves your current work (system status,

memory and screen image) to hard disk, and then the system can be totally powered off. Next time, when power is on, you can resume your original work directly from hard disk within few seconds without going through the Windows booting process and running your application again. If your memory is 64MB, normally, you need to reserve at least 64MB HDD space to save your memory image.

When go into Suspend:

When power-on next time:

System

Image &

Status

System

Image &

Status

Save into

Restore within seconds

Hard

Disk

Hard

Disk

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System Requirement

1. AOZVHDD.EXE 1.30b or later.

2. Delete config.sys and autoexec.bat.

Fresh installation of Windows 98 on a new system

1. Execute "Setup.exe /p j" to install Windows 98

2. After Windows 98's installation is complete, go to the Control Panel > Power Management.

a. Set Power Schemes > System Standby to "Never". b. Click on "Hibernate" and select "Enable Hibernate Support" then "Apply". c. Click on the "Advanced" tab, you'll see "Hibernate" on "Power Buttons". Note that this option will only be seen after step

b mentioned above has been completed; otherwise only "Standby" and "Shutdown" will be shown. Select "Hibernate" and "Apply".

3. Clean boot into DOS and run AOZVHDD utility.

a. If you assign t he whol e disk to yo ur Win 98 sys tem (FAT 16 or FAT 32), please ru n "aozvhdd /c /fil e". Please remember

sufficient free space has to be reserved in the disk, e.g. if you have 64 MB DRAM and 16 MB VGA card installed, the system needs at least 80 MB free space. The utility will locate the space automatically.

b. If you assign an individual partition for Win 98, please run "aozvhdd /c /partition". Of course, the system needs to

provid e unf orm at te d an emp ty pa rt iti o n.

4. Reboot sys tem .

5. You've already implemented ACPI Suspend to-Hard Drive. Click "Start > Shut Down > Standby" then the screen will go off

immediately. And 1 minute or so will be taken for the system to save what's in the memory to the hard drive; the larger the memory size the longer this process will take.

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Changing from APM to ACPI (Windows 98 only)

1. Run "Regedit.exe"

a. Go through the following path

HKEY_LOCAL_MACHINE

SOFTWARE

MICROSOFT

WINDOWS

CURRENT VERSION

DETECT b. Select "ADD Binary" and name it as "ACPIOPTION". c. Right click and select Modify, add "01" after "0000" to make it "0000 01". d. Save changes.

2. Select "Add New Hardware" under Control Panel. Allow Windows 98 to detect new hardware. (It will find "ACP I B I O S " and remove "Plug and Pla y BIOS")

3. Reboot sys tem .

4. Clean boot into DOS and run "AOZVHDD.EXE /C /File"

Changing from ACPI to APM

1. Run "Regedit.exe" a. Go through the following path

AAXX44BB MMaaxx // AAXX44BB UU22 OOnnlliinnee MMaannuuaall

HKEY_LOCAL_MACHINE

SOFTWARE

MICROSOFT

WINDOWS

CURRENT VERSION

DETECT

ACPI OPTION

b. Right click and select "Modify, change "01" to "02" to make it "0000 02".

c. Save changes.

2. Select "Add New Hardware" under Control Panel. Allow Windows 98 to detect new hardware. (It will find "Plug and Play

BIOS" and remove "ACPI BIOS")

3. Reboot sys tem .

4. Run "Add New Hardware" again and it will find "Advanced Power Management Resource".

5. Click "OK ".

Tip: "02" means Windows 98 is ACPI acknowledged but the ACPI function is disabled.

Tip: Currently we found only ATI 3D Rage Pro AGP card would support

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AACCPPII SSuussppeenndd ttoo RRAAMM ((SSTTRR))

This motherboard supports ACPI Suspend to RAM function. With this function, you can resume your original work directly from DRAM without going through the Windows 98 booting process and run your application again. Suspend to DRAM saves your current work in the system memory, it is faster than Suspend to Hard Drive but requires power supplied to DRAM, while Suspend to Hard Drive requires no power.

When go into Suspend:

When power-on next time:

System Image & Status

in the DRAM

System Image & Status

in the DRAM

Backup by 3.3V Power

Power back to

Other System

Devices

Other System

Devices

Power loss

Power back to w

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To implement ACPI Suspend to DRAM, please follow the procedures as below:

System Requirement

1. An ACPI OS is required. Currently, except Windows 95 and Windows NT, all other Windows Systems support ACPI.

2. The Intel

Chipset Software Installation Utility must have been installed properly.

Procedures

1. Changed the f ollowing BIOS settings.

BIOS Setup > Power Management Setup > ACPI Function: Enabled

BIOS Setup > Power Management Setup > ACPI Suspend Type: S3.

2. Go to Control Panel > Power Management. Set “Power Buttons” to “Standby”.

3. Press power button or standby button to wake up the system.

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AAWWAARRDD BBIIOOSS

System parameters can be modified by going into BIOS Setu p menu, t his men u allows you to co nfigu re the sy stem par ameter s and save the configuration into the 128 bytes CMOS area, (normally in the RTC chip or in the mai n chipset).

The AwardBIOS™ that installed in the Flash RO M BIOS provides critical low-level support for standard devices such as hard disk drives, serial and parallel ports.

Most BIOS setting of AX4B Max / AX4B U2 had been optimized by AOpen R&D engineering team. But, the default setting of BIOS still can’t fine-tune the chipset controlling entire system. Therefore, the rest of this chapter is intended to guide you through the process of configuring your system using setup.

Currently there are two kinds of beep sound when system fails to boot at POST. The first type of beep sound consists of a single long beep and two short beeps, indicating that a video error has failed BIOS from initializing video screen for displaying any additional information. The second type of beep sound is a single long beep that beeps repeatedly, signaling a DRAM error has occurred. You may look over the indicated error according to different beep significances.

To enter to BIOS setup menu

, press <Del> when POST (Power-On Self Test) screen is shown on your monitor.

of the motherboard is a custom version of an industry standard BIOS. The

Note: Because the BIOS code is the most often changed part of the motherboard design, the BIOS information contained in this manual may be different with actual BIOS that come with your motherboard.

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AAbboouutt BBIIOOSS FFuunnccttiioonn DDeessccrriippttiioonn……

AOpen always dedicates to give users a more friendly computer system. Now, we include all function descriptions of BIOS setup program into the BIOS Flash ROM. When you select one function of BIOS setup program, the function description will appeared at right side of screen. Hence, you don’t need read this manual while you changing the BIOS setting.

Menu Items Select Window Item Function Description Window

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HHooww TToo UUssee AAwwaarrdd™™ BBIIOOSS SSeettuupp PPrrooggrraamm

Generally, you can use the arrow keys to highlight items that you want to choose, then press <Enter> key to select, and use the <Page Up> and <Page Down> key to change setting value. You also can press <F1> key for help and press <Esc> key to quit

Award™ BIOS setup program. The following table provides details about how to use keyboard in the Award™ BIOS setup program. By the way, all products of AOpen also provides a special function in the BIOS setup, you can press <F3> key selecting preferred menu language to display.

Key Description

Page Up or + Changing setting to next value or increase the value. Page Down or - Changing setting to previous value or decrease value. Enter Select the item. Esc 1. In main menu: Quit and don’t save any change.

2. In sub menu: Exit current menu to main menu. Up Arrow Highlight previous item. Down Arrow Highlight next item. Left Arrow Move the light bar to left side of menu. Right Arrow Move the light bar to right side of menu. F1 Get menu or item help description. F3 Changing menu language. F5 Load previous setting value from CMOS.

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Key Description

F6 Load fail-save setting value from CMOS. F7 Load turbo setting value from CMOS. F10 Save changed setting and exit setup program.

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HHooww TToo EEnntteerr BBIIOOSS SSeettuupp

After you finish the setting of jumpers and connect correct cables. Power on and enter the BIOS Setup, press <Del> during

POST (Power-On Self Test). Choose "Load Setup Defaults" for recommended optimal performance.

Del

Warning: Please avoid of using "Load Turbo Defaults", unless you are sure your system components (CPU, DRAM, HDD, etc.) are good enough for turbo setting.

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BBIIOOSS UUppggrraaddee uunnddeerr WWiinnddoowwss eennvviirroonnmmeenntt

With outstanding R&D ability of AOpen, we now bring you a whole new BIOS Flash wizard ---- EZWinFlash. With an eye to users convenience, EZWinFlash combines the BIOS binary code and flash module together, so the only thing you have to do is just clicking on the utility you downloaded from web and let it helps you complete the flash process automatically. EZWinFlash detects your motherboard and checks the BIOS version cleverly to prevent your system from any possible failure. Moreover, EZWinFlash has been taken into consideration to go with any windows platform you might be using, no matter if you’re using Windows 95/98, 98SE/ME, NT4.0/2000, or even the latest Windows XP.

In the meanwhile, in order to provide a much more user-friendly operating environment, AOpen EZWinFlash is natively designed to have multi-language function to provide easier way for users’ usage in changing BIOS setting.

Caution: By updating your motherboard, you are taking a risk of BIOS flash failure. If your motherboard is working stable, and there are no major bugs that had been f ixed by a latt er BIOS rev ision, we recommend that you DO NOT try to upgrade your BIOS.

If you intent on upgrading, PLEASE BE SURE to get the right BIOS revision for the right motherboard model to avoid any

ossibility failure.

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You may accomplish BIOS upgrade procedure with EZWinFlash by the following steps, and it’s STRONGLY RECOMMMANDE D to close all the applications before you start the upgrading.

1. Download the new version of BIOS package zip

2. Unzip the download BIOS package (ex: WAX4BP102.ZIP) with WinZip (http://www.winzip.com environment.

3. Save the unzipped files into a folder, for example, WAX4BP102.EXE & WAX4BP102.BIN.

4. Double click on the WAX4BP102.EXE, EZWinFlash will detect the model name and BIOS version of your motherboard. If

you had got the wrong BIOS, you will not be allowed to proceed with the flash steps.

5. You may select preferred language in the main menu, then click [Start Flash] to start the BIOS upgrade procedure.

6. EZW inFlash will complete all the process automatically, and a dialogue box will pop up to ask you to restart Windows. You may click [YES] to reboot Windows.

7. Press < Del > at P OST to enter BIOS setup

It is strongly recommended NOT to turn off the power or run any application during FLASH PROCESS.

file from AOpen official web site. (ex: http://www.aopen.com)

) in Windows

, choose "Load Setup Defaults", then “Save & Exit Setup”. Done!

Warning: The new BIOS upgrade will permanently replace your original BIOS’s settings when flashing. You may need to reconfigure your BIOS setting so that your system can go back to work as normal.

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OOvveerrcclloocckkiinngg

As a leading manufacturer in motherboard industry, AOpen always listens to what customers want and develop products to fit different user's requirements. Reliability, compatibility, leading technology and friendly features are our basic goals when designing motherboards. Other than above mentioned design criteria, there are power users who are always seeking to push the limitation of the system performance by overclocking which we call them "Overclocker".

This section is dedicated to overclockers. This high performance motherboard is designed for maximum 400MHz CPU bus clock. But it comes with clock generator of

248MHz when we design it to accommodate with future CPU bus clock. Our lab test results showed that 120MHz is achievable when proper setting and qualified components were presented. Not only that, the CPU clock ratio can be up to 24x that supports almost all of Pentium feel appropriate for this motherboard is 120MHz bus clock.

But not guaranty. ☺

Tip: Note that overclocking may also cause thermal problem. Please make sure that the cooling fan and the heatsink were adequate to dissipate excessive heat that's generated by overclocking the CPU.

4 CPUs in the future and provides flexibility for overclockers. For your reference, the configuration we

☺

☺☺

Warning: The design of this product follows CPU and chipset vendor's design guideline. Any attempts to push beyond product specification are not recommended and you are taking your own risk to damage your system or important data. Before doing overclocking, you must make sure your components are able to tolerate such abnormal setting, especially CPU, DRAMs, hard disks, and AGP VGA cards.

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VVGGAA CCaarrdd && HHaarrdd DDiisskk

VGA and HDD is key components for overclocking, for your reference, the following list are what have been successful overclocked in our lab. Please note that AOpen can not guaranty they can be successful overclocked again. Please check the Available Vendor List ( AVL) by link to our official website.

VGA: http://www.aopen.com.tw/tech/report/overclk/mb/vga-oc.htm HDD: http://www.aopen.com.tw/tech/report/overclk/mb/hdd-oc.htm

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GGlloossssaarryy

AACC9977

Basically, AC97 specification separates sound/modem circuit to two parts, digital processor and a CODEC for analogy I/O they are linked by AC97 link bus. Since digital processor can be put into motherboard main chipset, the cost of sound/modem onboard solution can be reduced.

AACCPPII ((AAddvvaanncceedd CCoonnffiigguurraattiioonn && PPoowweerr IInntteerrffaaccee))

ACPI is the power management specification of PC97 (1997). It intends to save m ore power by taking full control of power management to operating system and bypass BIOS to operating system (such as Windows 98). This is a bit similar as the PnP power switch to control the power state transition.

AAGGPP ((AAcccceelleerraatteedd GGrraapphhiicc PPoorrtt))

AGP is a bus interface targeted for high-performance 3D graphic. AGP supports only memory read/write operation and single-master single-slave one-to-one only. AGP uses both rising and falling edge of the 66MHz clock, for 2X AGP, the data transfer rate is 66MHz x 4byte x 2 = 528MB/s. AGP is now moving to 4X mode, 66MHz x 4byte x 4 = 1056MB/s. AOpen is the first company to support 4X AGP motherboards by both AX6C (Intel 820) and MX64/AX64 (VIA 694x), started from Oct 1999.

. The chipset or super I/O chip needs to provide standard register interface

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AAMMRR ((AAuuddiioo//MMooddeemm RRiisseerr))

The CODEC circuit of AC97 sound/modem solution can be put on motherboard or put on a riser card (AMR card) that connects to motherboard through AMR connector.

AAOOppeenn BBoonnuuss PPaacckk CCDD

A disc bundled with AOpen motherboard product; there are motherboard drivers, Acrobat Reader for PDF online manual and other us ef ul ut il iti es .

AAPPMM ((AAddvvaanncceedd PPoowweerr MMaannaaggeemmeenntt))

Unlike ACPI, BIOS controls most APM power management functions. AOpen Suspend to Hard Drive is a good example of APM power management.

AATTAA ((AATT AAttttaacchhmmeenntt))

ATA is the specification of diskette interface. In 80’s, many software and hardware manufacturers instituted the ATA specification together. The AT is meaning International Business Machines Corporation (IBM) personal computer/AT’s bus structure.

AATTAA//6666

ATA/66 uses both rising edge and falling edge but doubles UDMA/33 transfer rate. The data transfer rate is 4 times of the PIO mode 4 or DMA mode 2, 16.6MB/s x4 = 66MB/s. To use ATA/66, you need special ATA/66 IDE cable.

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AATTAA//110000

ATA/100 is a new IDE specification under developing. ATA/100 uses both rising edge and falling edge as ATA/66 but clock cycle time is reduced to 40ns. The data transfer rate is (1/40ns) x 2 bytes x 2 = 100MB/s. To use ATA/100, you need special 80-wire IDE cab l e, t h e s ame as ATA/66.

BBIIOOSS ((BBaassiicc IInnppuutt//OOuuttppuutt SSyysstteemm))

BIOS is a set of assembly routine/program that reside in EPROM or Flash R OM. BIOS controls Input/output devices and other hardware devices of motherboard. In general, to provide hardware independent portability, operation system and drivers is required to access BIOS without directly access hardware devices.

BBuuss MMaasstteerr IIDDEE ((DDMMAA mmooddee))

The traditional PIO (Programmable I/O) IDE requires the CPU to involve in all the activities of the IDE access including waiting for the mechanical events. To reduce the workload of the CPU, the bus master IDE device transfers data from/to memory without interrupting CPU, and releases CPU to operate concurrently while data is transferring between memory and IDE device. You need the bus master IDE driver and the bus master IDE HDD to support bus master IDE mode.

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CCNNRR ((CCoommmmuunniiccaattiioonn aanndd NNeettwwoorrkkiinngg RRiisseerr))

The CNR specification provides the PC industry the opportunity to deliver a flexible and cost reduced method of implementing LAN, home networking, DSL, USB, wireless, audio and modem subsystems widely used in today's "connected PCs". The CNR specification is an open industry specification and is supported by OEMs, IHV card manufacturers, silicon supplier and Microsoft.

CCOODDEECC ((CCooddiinngg aanndd DDeeccooddiinngg))

Normally, CODEC means a circuit that can do digital to analog conversion and also the analog to digital conversion. It is part of

sound/modem solution.

AC97

DDDDRR ((DDoouubbllee DDaattaa RRaatteedd)) SSDDRRAAMM

DDR SDRAM utilizes the existing DRAM infrastructure and technology while doubling the nominal bandwidth available to systems in an easy to design and simple to adopt way. Initi ally a perfect solution for memory intensive server and workstation applications, DDR low cost and low voltage will ultimately make it an ideal solution for all segments of the PC market, high performance desktop and mobile PCs, Value PCs and even Internet Appliances and mobile devices.

DDIIMMMM ((DDuuaall IInn LLiinnee MMeemmoorryy MMoodduullee))

DIMM socket has total 168-pin and supports 64-bit data. It can be single or double side, the golden finger signals on each side of PCB are different, and that is why it was called Dual In Line. Almost all DIMMs are made by SDRAM Note that some old DIMMs are made by FPM/EDO

and only operate at 5V. Do not confuse them with SDRAM DIMM.

, which operate at 3.3V.

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DDMMAA ((DDiirreecctt MMeemmoorryy AAcccceessss))

Channel for communications between the memory and surrounding devices.

EECCCC ((EErrrroorr CChheecckkiinngg aanndd CCoorrrreeccttiioonn))

The ECC mode needs 8 ECC bits for 64-bit data. Each time memory is accessed; ECC bits are updated and checked by a special algorithm. The ECC algorithm has the ability to detect double-bit error and automatically correct single-bit error while parity mode can only detect single-bit error.

EEDDOO ((EExxtteennddeedd DDaattaa OOuuttppuutt)) MMeemmoorryy

The EDO DRAM technology is actually very similar to FPM (Fast Page Mode). Unlike traditional FPM that tri-states the memory output data to start the pre-charge activity, EDO DRAM holds the memory data valid until the next memory access cycle, that is similar to pipeline effect and reduces one clock state.

EEEEPPRROOMM ((EElleeccttrroonniicc EErraassaabbllee PPrrooggrraammmmaabbllee RROOMM))

Also known as E2PROM. Both EEPROM and Flash ROM can be re-programmed by electronic signals, but the interface technology is different. Size of EEPROM is much smaller than flash ROM.

AAXX44BB MMaaxx // AAXX44BB UU22 OOnnlliinnee MMaannuuaall

EEPPRROOMM ((EErraassaabbllee PPrrooggrraammmmaabbllee RROOMM))

Traditional motherboard stores BIOS code in EPROM. EPROM can only be erased by ultra-violet (UV) light. If BIOS has to be upgraded, you need to remove EPROM from motherboard, clear by UV light, re-program, and then insert back.

EEVV66 BBuuss

EV6 Bus in the technology of Alpha processor from Digital Equipment Corporation. EV6 bus uses both rising and falling clock edge to transfer data, similar as DDR SDRAM or ATA/66 IDE bus. EV6 Bus Speed = CPU external bus clock x 2. For example, 200 MHz EV6 bus is actually using 100 MHz external bus clock, but the equivalent speed is 200 MHz.

FFCCCC DDooCC ((DDeeccllaarraattiioonn ooff CCoonnffoorrmmiittyy))

The DoC is component certification standard of FCC EMI regulations. This standard allows DIY component (such as motherboard) to apply DoC label separately without a shielding of housing.

FFCC--PPGGAA ((FFlliipp CChhiipp--PPiinn GGrriidd AArrrraayy))

FC means Flip Chip, FC-PGA is a new package of Intel for Pentium III CPU. It can plug into SKT370 socket, but require motherboard to add some signals on socket 370. That is, the motherboard needs to be redesigned. Intel is going to ship FC-PGA 370 CPU and phase out slot1 CPU.

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FFllaasshh RROOMM

Flash ROM can be re-programmed by electronic signals. It is easier for BIOS to upgrade by a flash utility, but it is also easier to be infected by virus. Because of increase of new functions, BIOS size is increased from 64KB to 256KB (2M bit). AOpen AX5T is the first board to implement 256KB (2Mbit) Flash ROM. Now flash ROM size is moving to 4M bit on AX6C (Intel 820) and MX3W (Intel 810) motherboard. , AOpen motherboard uses EEPROM for jumper-less and battery-less design.

FFSSBB ((FFrroonntt SSiiddee BBuuss)) CClloocckk

FSB Clock means CPU external bus clock. CPU internal clock = CPU FSB Clock x CPU Clock Ratio

CC BBuuss

See SMBus.

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IIEEEEEE 11339944

IEEE 1394 is a low-cost digital interface originated by Apple Computer as a desktop LAN and developed by the IEEE 1394 working group. The IEEE 1394 can transport data at 100, 200 or 400 Mbps. One of the solutions to connect digital television devices together at 200 Mbps. Serial Bus Management provides overall configuration control of the serial bus in the form of optimizing arbitration timing, guarantee of adequate electrical power for all devices on the bus, assignment of isochronous channel ID, and notification of errors. There are two type of IEEE 1394 data transfer: asynchronous and isochronous. Asynchronous transport is the traditional computer memory-mapped, load and store interface. Data requests are sent to a specific address and an acknowledgment is returned. In addition to an architecture that scales with silicon technology, IEEE 1394 features a unique isochronous data channel interface. Isochronous data channels provide guaranteed data transport at a pre-determined rate. This is especially important for time-critical multimedia data where just-in-time delivery eliminates the need for costly buffering.

PPaarriittyy BBiitt

The parity mode uses 1 parity bit for each byte, normally it is even parity mode, that is, each time the memory data is updated, parity bi t will be adjusted to have ev en count " 1" for ea ch byte. W hen next t ime, if m emory is r ead with odd numbe r of "1", th e parity error is occurred and this is called single bit error detection.

PPBBSSRRAAMM ((PPiippeelliinneedd BBuurrsstt SSRRAAMM))

For Socket 7 CPU, one burst data read requires four QWord (Quad-word, 4x16 = 64 bits). PBSRAM only needs one address decoding time and automatically sends the remaining QWords to CPU according to a predefined sequence. Normally, it is 3-1-1-1, total 6 clocks, which is faster than asynchronous SRAM. PBSRAM is often used on L2 (level 2) cache of Socket 7 CPU. Slot 1 and Socket 370 CPU do not need PBSRAM.

100

Aopen AX4BMAX User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

AX4B Max / AX4B U2

Chipset

Expansion Slots

Memory

Ultra DMA 33/66/100 Bus Master IDE

1MHz Stepping Frequency Adjustment

Watch Dog Timer

Die-Hard BIOS with external contro ller

Eight USB ports

Dr. LED

AGP Protection Technology

Dr. Voice

Power Management/Plug and Play

Hardware Monitoring Management

Enhanced ACPI

Super Multi-I/O

Motherboard Map

Under Windows ME System

Under Windows 2000 System

Under Windows XP System

System Requirement

Fresh installation of Windows 98 on a new system

Changing from APM to ACPI (Windows 98 only)

Changing from ACPI to APM

System Requirement

Procedures