Asus TUA266 User manual

®
TUA266
JumperFree™133MHz FSB
DDR/SDR SDRAM AGP Pro/4X
Socket 370 Motherboard
USER’S MANUAL

ASUS TUA266 User’s Manual
2
USER'S NOTICE
Product Name: ASUS TUA266
Manual Revision: 1.01 E802
Release Date: July 2001
No part of this manual, including the products and software described in it, may be reproduced,
transmitted, transcribed, stored in a retrieval system, or translated into any language in any form or
by any means, except documentation kept by the purchaser for backup purposes, without the express
written permission of ASUSTeK COMPUTER INC. (“ASUS”).
ASUS PROVIDES THIS MANUAL “AS IS” WITHOUT WARRANTY OF ANY KIND, EITHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES
OR CONDITIONS OF MERCHANTABILITY OR FITNESS FORAPARTICULAR PURPOSE. IN
NO EVENT SHALLASUS, ITS DIRECTORS, OFFICERS, EMPLOYEES ORAGENTS BE LIABLE
FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
(INCLUDING DAMAGES FOR LOSS OF PROFITS, LOSS OF BUSINESS, LOSS OF USE OR
DATA, INTERRUPTION OF BUSINESSAND THE LIKE), EVEN IFASUS HAS BEENADVISED
OF THE POSSIBILITY OF SUCH DAMAGES ARISING FROM ANY DEFECT OR ERROR IN
THIS MANUAL OR PRODUCT.
Product warranty or service will not be extended if: (1) the product is repaired, modified or altered,
unless such repair, modification of alteration is authorized in writing by ASUS; or (2) the serial
number of the product is defaced or missing.
Products and corporate names appearing in this manual may or may not be registered trademarks or
copyrights of their respective companies, and are used only for identification or explanation and to
the owners’ benefit, without intent to infringe.
• Intel and Pentium are registered trademarks of Intel Corporation.
• C-Media is a registered trademark of C-Media Electronics Inc.
• Windows and MS-DOS are registered trademarks of Microsoft Corporation.
• Adobe and Acrobat are registered trademarks of Adobe Systems Incorporated.
• Trend and ChipAwayVirus are trademarks of Trend Micro, Inc.
• Symbios is a registered trademark of Symbios Logic Corporation.
The product name and revision number are both printed on the product itself. Manual revisions are
released for each product design represented by the digit before and after the period of the manual
revision number. Manual updates are represented by the third digit in the manual revision number.
For previous or updated manuals, BIOS, drivers, or product release information, contact ASUS at
http://www.asus.com.tw or through any of the means indicated on the following page.
SPECIFICATIONS AND INFORMATION CONTAINED IN THIS MANUAL ARE FURNISHED
FOR INFORMATIONAL USE ONLY, AND ARE SUBJECT TO CHANGE AT ANY TIME
WITHOUT NOTICE, AND SHOULD NOT BE CONSTRUED AS A COMMITMENT BY ASUS.
ASUS ASSUMES NO RESPONSIBILITY OR LIABILITY FOR ANY ERRORS OR
INACCURACIES THATMAYAPPEAR INTHIS MANUAL, INCLUDINGTHE PRODUCTSAND
SOFTWARE DESCRIBED IN IT.
Copyright © 2001 ASUSTeK COMPUTER INC. All Rights Reserved.

ASUS TUA266 User’s Manual 3
ASUS CONTACT INFORMATION
ASUSTeK COMPUTER INC. (Asia-Pacific)
Marketing
Address: 150 Li-Te Road, Peitou, Taipei, Taiwan 112
Telephone: [phone]
Fax: [phone]
Email: [email protected]
Technical Support
MB/Others (Tel): [phone] (English)
Notebook (Tel): [phone] (English)
Desktop/Server (Tel):[phone] (English)
Fax: [phone]
Email: [email protected]
WWW: www.asus.com.tw
FTP: ftp.asus.com.tw/pub/ASUS
ASUS COMPUTER INTERNATIONAL (America)
Marketing
Address: 6737 Mowry Avenue, Mowry Business Center, Building 2
Newark, CA 94560, USA
Fax: [phone]
Email: [email protected]
Technical Support
Fax: [phone]
Email: [email protected]
WWW: www.asus.com
FTP: ftp.asus.com/Pub/ASUS
ASUS COMPUTER GmbH (Europe)
Marketing
Address: Harkortstr. 25, 40880 Ratingen, BRD, Germany
Fax: [phone]
Email: [email protected] (for marketing requests only)
Technical Support
Hotline: MB/Others: [phone] Notebook:[phone]
Fax: [phone]
Support (Email): www.asuscom.de/de/support (for online support)
WWW: www.asuscom.de
FTP: ftp.asuscom.de/pub/ASUSCOM

ASUS TUA266 User’s Manual
4
CONTENTS
1. INTRODUCTION ............................................................................. 7
1.1 How This Manual Is Organized ................................................... 7
1.2 Item Checklist .............................................................................. 7
2. FEATURES ........................................................................................ 8
2.1 ASUS TUA266 Motherboard ...................................................... 8
2.1.1 Specifications ..................................................................... 8
2.1.2 Performance...................................................................... 10
2.1.3 Intelligence ....................................................................... 11
2.2 Motherboard Components.......................................................... 12
2.2.1 Component Locations....................................................... 13
3. HARDWARE SETUP ...................................................................... 14
3.1 Motherboard Layout .................................................................. 14
3.2 Layout Contents ......................................................................... 15
3.3 Hardware Setup Procedure......................................................... 17
3.4 Motherboard Settings ................................................................. 17
3.5 System Memory ......................................................................... 21
3.5.1 General DIMM Notes....................................................... 21
3.5.2 Memory Installation ......................................................... 22
3.6 Central Processing Unit (CPU) .................................................. 23
3.6.1 CPU Installation ............................................................... 24
3.7 Expansion Cards ........................................................................ 25
3.7.1 Installing an Expansion Card ........................................... 25
3.7.2 Assigning IRQs for Expansion Cards .............................. 26
3.7.3 Accelerated Graphics Port (AGP) Pro Slot ...................... 27
3.7.4 Audio Modem Riser (AMR)) Slot.................................... 28
3.8 Connectors ................................................................................ 29
3.8.1 External Connectors ......................................................... 29
3.8.2 Internal Connectors .......................................................... 32
3.9 Starting Up the First Time.......................................................... 42

ASUS TUA266 User’s Manual 5
CONTENTS
4. BIOS SETUP..................................................................................... 43
4.1 Managing and Updating Your BIOS .......................................... 43
4.1.1 Upon First Use of the Computer System.......................... 43
4.1.2 Updating BIOS Procedures .............................................. 45
4.2 BIOS Setup Program.................................................................. 47
4.2.1 BIOS Menu Bar................................................................ 48
4.2.2 Legend Bar ....................................................................... 48
4.3 Main Menu ................................................................................. 50
4.3.1 Primary & Secondary Master/Slave ................................. 51
4.3.2 Keyboard Features............................................................ 54
4.4 Advanced Menu ......................................................................... 56
4.4.1 Chip Configuration........................................................... 60
4.4.2 I/O Device Configuration ................................................. 63
4.4.3 PCI Configuration ............................................................ 65
4.5 Power Menu ............................................................................... 67
4.5.1 Power Up Control............................................................. 69
4.5.2 Hardware Monitor ............................................................ 71
4.6 Boot Menu ................................................................................. 72
4.7 Exit Menu................................................................................... 74
5. SOFTWARE SETUP....................................................................... 77
5.1 Operating Systems ..................................................................... 77
5.1.1 Windows 98 First Time Installation ................................. 77
5.2 TUA266 Motherboard Support CD ........................................... 77
5.2.1 Installation Menus ............................................................ 77
5.2.2 Applications...................................................................... 78
6. SOFTWARE REFERENCE ........................................................... 81
6.1 ASUS PC Probe ......................................................................... 81
6.1.1 Starting ASUS PC Probe .................................................. 81
6.1.2 Using ASUS PC Probe ..................................................... 82
6.1.3 ASUS PC Probe Task Bar Icon ........................................ 86
7. APPENDIX....................................................................................... 87
7.1 Glossary ..................................................................................... 87
INDEX ................................................................................................... 91

ASUS TUA266 User’s Manual
6
FCC & DOC COMPLIANCE
Federal Communications Commission Statement
This device complies with FCC Rules Part 15. Operation is subject to the following
two conditions:
• This device may not cause harmful interference, and
• This device must accept any interference received, including interference that
may cause undesired operation.
This equipment has been tested and found to comply with the limits for a Class B
digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to
provide reasonable protection against harmful interference in a residential
installation.This equipment generates, uses and can radiate radio frequency energy
and, if not installed and used in accordance with manufacturer's instructions, may
cause harmful interference to radio communications. However, there is no guarantee
that interference will not occur in a particular installation. If this equipment does
cause harmful interference to radio or television reception, which can be determined
by turning the equipment off and on, the user is encouraged to try to correct the
interference by one or more of the following measures:
• Re-orient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment to an outlet on a circuit different from that to which
the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.
WARNING!Anychangesormodifications to this productnotexpressly approved
by the manufacturer could void any assurances of safety or performance and
could result in violation of Part 15 of the FCC Rules.
Reprinted from the Code of Federal Regulations #47, part 15.193, 1993. Washington DC: Office of the
Federal Register, National Archives and Records Administration, U.S. Government Printing Office.
Canadian Department of Communications Statement
This digital apparatus does not exceed the Class B limits for radio noise emissions
from digital apparatus set out in the Radio Interference Regulations of the Canadian
Department of Communications.
This Class B digital apparatus complies with Canadian ICES-003.
CetappareilnumériquedelaclasseBestconformeàlanormeNMB-003duCanada.

ASUS TUA266 User’s Manual 7
1.1 How This Manual Is Organized
This manual is divided into the following sections:
1. INTRODUCTION Manual information and checklist
2. FEATURES Production information and specifications
3. HARDWARE SETUP Instructions on setting up the motherboard.
4. BIOS SETUP Instructions on setting up the BIOS
5. SOFTWARE SETUP Instructions on setting up the included software
6. SOFTWARE REFERENCE Reference material for the included software
7. APPENDIX Optional items and general reference
1.2 Item Checklist
Check that your package is complete. If you discover damaged or missing items,
contact your retailer.
1. INTRODUCTION
1. INTRODUCTION
Manual / Checklist
Package Contents
(1) ASUS Motherboard
(1) 40-pin 80-conductor ribbon
cable for internal UltraDMA/66
or UltraDMA/33 IDE drives
(1) Ribbon cable for two 3.5”
floppy disk drives
(1) ASUS Support CD with drivers
and utilities
(1) Bag of spare jumper caps
(1) ASUS 2-port USB Connector
Set
(1) User’s Manual
Optional Item
ASUS IrDA-compliant infrared
module

8ASUS TUA266 User’s Manual
2.1 ASUS TUA266 Motherboard
Powered by the latest Intel
®
processors, the TUA266 motherboard bundles select
features and compatible interfaces to deliver value and flexibility.
2.1.1 Specifications
•Processor Support
Intel Pentium
®
III 100/133MHz FSB Tualatin™core FC-PGA2
Intel Pentium
®
III 100/133MHz FSB Coppermine core FC-PGA
Intel Celeron™100/66MHz FSB Coppermine core FC-PGA
•North Bridge System Chipset: Features the ALi M1651 North Bridge that
provides optimum architecture design to support Intel Pentium III/Celeron CPUs
with 133/100 FSB, a memory interface for both 66/100/133 SDR and 200/266
DDR, and AGP Pro/4X interface solution.
•South Bridge System Chipset:ALi M1535D+ South Bridge chipset provides a
high integration bridge between PCI bus and peripheral bus. The chipset comes
with built-in advanced Super I/O controller and power management feature.
•DDR/SDR Memory Support: Equipped with two Double Data Rate (DDR)
Dual Inline Memory Module (DIMM) sockets to support up to 2GB of memory
using the latest high-speed 2.5V PC1600/PC2100 SDRAM modules, and three
Single Data Rate (SDR) sockets for a maximum of 3GB memory using 3.3V
PC133/100 SDRAM.
•JumperFree™Mode: Allows processor settings and easy overclocking of
frequency and Vcore voltage through BIOS setup when the JumperFree™mode
is enabled. Easy-to-use DIP switches come with the motherboard board to allow
manual adjustment of the processor external/internal frequency.
•UltraDMA/100Support:Comes withanonboardPCI Bus Master IDEcontroller
with two connectors that support four IDE devices on two channels. Supports
UltraDMA/100, UltraDMA/66, UltraDMA/33, PIO Modes 3 & 4, Bus Master
IDE DMA Mode 2, and Enhanced IDE devices, such as DVD-ROM, CD-ROM,
CD-R/RW, LS-120, and Tape Backup drives.
•AGP Pro Slot: Comes with an Accelerated Graphics Port (AGP) Pro slot that
supports high performance AGP cards targeted at 3D graphical applications
supporting 133MHz 4X mode. The slot is backward compatible with AGP 4X/
2X cards.
•Wake-On-LAN: Supports Wake-On-LAN activity through a WOL connector
or an optional ASUS PCI-L101 10/100 Fast Ethernet PCI card.
•Wake-On-Ring: Supports Wake-On-Ring activity through a PCI modem card
that supports a WOR connector.
2. FEATURES
Specifications
2. FEATURES

ASUS TUA266 User’s Manual 9
2. FEATURES
2. FEATURES
Specifications
•PC Health Monitoring: Provides an easy way to test and manage system status
information, such as CPU and system voltages, temperatures, and fan status
through the onboard hardware ASUS ASIC and the bundled ASUS PC Probe.
•SMBus: Features the System Management Bus interface used to physically
transport commands and information between SMBus devices.
•PCI Expansion Slots: Provides five 32-bit PCI (Rev. 2.2) expansion slots that
support Bus Master PCI cards, such as SCSI or LAN cards, with 133MB/s
maximum throughput.
•AMR Slot: Supports an Audio Modem Riser (AMR) slot that accommodates a
specially designed audio/modem card.
•Advanced Super I/O: Provides two high-speed UART compatible serial ports
and one parallel port with EPPand ECPcapabilities. UART2 can also be directed
from COM2 to the Infrared Module for wireless connections. The Super I/O
controller built-in the M1535D+ South Bridge also supports a floppy disk drive,
PS/2 keyboard, and PS/2 mouse.
•SmartBIOS:2Mb firmware provides Vcore and CPU/DDR SDRAM frequency
adjustments,bootblockwriteprotection, and HD/SCSI/MO/ZIP/CD/Floppy boot
selection.
•EnhancedACPIandAnti-BootVirusProtection:Programmable BIOS (Flash
EEPROM) that offers enhancedACPI for Windows 98/2000/ME compatibility,
built-in firmware-based virus protection, and autodetection of most devices for
a virtual automatic setup.
•IrDA: Supports an optional infrared port module for wireless interface.
•Desktop Management Interface (DMI): Supports DMI through BIOS that
allows hardware to communicate within a standard protocol and create a higher
level of compatibility. (Requires DMI-enabled components.)
•Onboard LED: Comes with a power LED that lights up if there is any standby
power on the motherboard. This LED acts as a reminder to turn off the system
power before plugging or unplugging devices to prevent damage to the
motherboard, peripherals, and other system components.
•OnboardAudio(optional):Audio models come with the four-channel C-Media
CMI8738 PCI audio controller that supports the legacy audio SB PRO™, FM
emulator/DLS wavetable music synthesis, and HRTF 3D positional audio
functions.
•Easy Connectivity and System Information Access: Supports an optional
ASUS iPanel, an easy-to-access box with system diagnostic display area, system
status LEDs, USB ports, and hot keys. The AFPANEL connector on the
motherboard accommodates the ASUS iPanel.

10 ASUS TUA266 User’s Manual
2. FEATURES
Performance
2. FEATURES
2.1.2 Performance
•ACPI Ready: Advanced Configuration Power Interface (ACPI) provides more
Energy Saving Features for operating systems that support OS Direct Power
Management (OSPM) functionality. With these features employed in the OS,
PCs can be ready around the clock but comply with energy saving standards. To
fully utilize theACPI benefits, use anACPI-supported OS such asWindows 98.
•PC’99 Compliant: Both the BIOS and hardware levels of ASUS smart series
motherboards are PC’99 compliant. The new PC’99 requirements for systems
and components are based on the following high-level goals: Support for Plug-
n-Play compatibility and power management for configuring and managing all
system components, and 32-bit device drivers and installation procedures for
Windows 95/98/NT. Color-coded connectors and descriptive icons make
identification easy as required by PC’99.
•High-Speed Data Transfer Interface: Support for UltraDMA/100 through the
onboard IDE bus master controller triples the UltraDMA/33 burst transfer rate.
UltraDMA/100 is backward compatible with DMA/66, DMA/33, and other
existing DMA devices to save the need to upgrade current EIDE/IDE drives.
(UltraDMA/66 requires a 40-pin 80-conductor cable).
•ConcurrentPCI:ConcurrentPCIallows multiple PCI transfers from PCI master
busses to the memory and processor.

ASUS TUA266 User’s Manual 11
2. FEATURES
2. FEATURES
Intelligence
2.1.3 Intelligence
•Auto Fan Off: The system fans powers off automatically even in sleep mode.
This function reduces both energy consumption and system noise, and is an
important feature in implementing silent PC systems.
•DualFunctionPower Button:Pushing the power button for less than 4 seconds
when the system is in the working state places the system into one of two states:
sleep mode or soft-off mode, depending on the BIOS or OS setting (see PWR
Button < 4 Secs in 4.5 Power Menu). When the power button is pressed for
more than 4 seconds, the system enters the soft-off mode regardless of the BIOS
setting.
•Fan Status Monitoring and Alarm: To prevent system overheat and system
damage, the CPU and system fans can be monitored for RPM and failure. All
fans are set for its normal RPM range and alarm thresholds.
•PowerLED(requiresACPI OS support):ThepowerLED indicates the system
status.
•Remote Ring-On (requires modem): This allows a computer to be turned on
remotely through an internal or external modem. With this benefit on-hand, users
can access vital information from their computers anywhere.
•System Resources Alert: Today’s operating systems such as Windows 98/ME
and Windows NT/2000, require much more memory and hard drive space to
presentenormous user interfaces and run largeapplications. The system resource
monitorwarnstheuser before the system resources are used up to preventpossible
application crashes. Suggestions provide the user some information on managing
their limited resources more efficiently.
•Temperature Monitoring and Alert: CPU temperature is monitored by the
ASUS ASIC through the CPU’s internal thermal diode (on Pentium III and
Celeron) to prevent system overheat and system damage.
•Voltage Monitoring and Alert: System voltage levels are monitored to ensure
stable voltage to critical motherboard components. Voltage specifications are
more critical for future processors, so monitoring is necessary to ensure proper
system configuration and management.
•Chassis Intrusion Detection: Supports chassis-intrusion monitoring through
the ASUS ASIC. A chassis intrusion event is kept in memory on battery power
for more protection.

12 ASUS TUA266 User’s Manual
2. FEATURES
2. FEATURES
M/B Components
Location
Processor Support Socket 370 for Pentium III Coppermine Processors ................ 2
Feature Setting DIP Switches ................................................... 8
Chipsets ALi M1651 North Bridge ......................................................... 1
Ali M1535D+ South Bridge ................................................... 15
2Mbit Programmable Flash EEPROM ................................... 12
Main Memory Maximum 3GB support
2 DDR DIMM Sockets ............................................................. 3
3 SDR DIMM Sockets ............................................................. 5
Expansion Slots 5 PCI Slots .............................................................................. 19
1 Accelerated Graphics Port (AGP) Pro/4X Slot ................... 20
1 Audio Modem Riser ............................................................ 17
System I/O 1 Floppy Disk Drive Connector ............................................. 13
2 IDE Connectors (UltraDMA/100 Support) ........................... 7
1 ASUS iPanel Connector ........................................................ 9
1 Parallel Port ............................................................... (Top) 22
2 Serial Ports (COM1/COM2) ............................... (Bottom) 22
USB Connectors (Port 0 & Port 1) ........................................ 23
USB Connectors (Ports 2/3/4/5) ............................................. 14
1 PS/2 Mouse Connector .............................................. (Top) 24
1 PS/2 Keyboard Connector ................................... (Bottom) 24
Hardware Monitoring System Voltage Monitoring (integrated inASUS ASIC) ....... 10
3 Fan Power and Speed Monitoring Connectors
Special Features Onboard LED ........................................................................... 4
Wake-On-LAN Connector...................................................... 16
Wake-On-Ring Connector ...................................................... 11
Audio Features (on audio models only)
CMI8738 Audio Controller .................................................... 18
1 Game/MIDI Port........................................................ (Top) 21
1 Line Out Connector ..................................... (Bottom, left) 21
1 Line In Connector................................... (Bottom, center) 21
1 Microphone Connector ............................. (Bottom, right) 21
Power ATX Power Supply Connector ................................................. 6
Form Factor ATX
2.2 Motherboard Components
See opposite page for locations.

ASUS TUA266 User’s Manual 13
2. FEATURES
2. FEATURES
Motherboard Parts
2.2.1 Component Locations
3
21
23
8
22
19
12
1 5 6
18
11
20
7
24
2
109
17
13141516
4

14 ASUS TUA266 User’s Manual
3. HARDWARE SETUP
3.1 Motherboard Layout
Motherboard Layout
3. H/W SETUP
NOTE: The C-Media CMI8738 audio chipset, external GAME/AUDIO
connectors, and internal audio connectors are optional components, and
present in audio models only. The components are grayed in the above
motherboard layout.
24.5cm (9.64in)
30.5cm (12.0in)
Primary IDE
Secondary IDE
PANEL
PCI 2
SMB
FLOPPY
TUA266
ALi
M1535D+
Chipset
ASUS
ASIC
with Hardware
Monitor
PCI 1
Accelerated Graphics Port (AGP Pro)
ALi
M1651
Chipset
Flash EEPROM
(Programable BIOS)
CR2032 3V
Lithium Cell
CMOS Power
PCI 4
PCI 3
PCI 5
GAME_AUDIO
Mic
In
Line
Out
Line
In
AUX
MODEM
CD1 LED
JEN
COM1
PARALLEL PORT
COM2
AFPANEL
Socket 370
01
DDR DIMM1 (64/72 bit, 184-pin module)
0 1
USB1
CHASSIS
IDE_LED
USB2
AUDIO_PANEL
MIC2
Audio Modem Riser
(AMR)
PS/2
T: Mouse
B: Keyboard
USB1
USB2
ATX Power Connector
DIMM Socket 3 (64/72-bit, 168-pin module)
45
CPU_FAN
PWR_FAN
CHA_FAN
WOR
WOL_CON
CL_RTC
JTPWR
DSW
01
DDR DIMM
2
(64/72 bit, 184-pin module)
2 3
DIMM Socket 3 (64/72-bit, 168-pin module)
23
DIMM Socket 3 (64/72-bit, 168-pin module)
01
IR
C-Media
CMI-8738
JP25V
CPUSEL1
CPUSEL

ASUS TUA266 User’s Manual 15
3. HARDWARE SETUP3. HARDWARE SETUP
3.2 Layout Contents
Motherboard Settings
1) JEN p. 18 JumperFree Mode Setting (Disable/Enable)
2) DIP_SW 1–4 p. 19 CPU External Frequency Selection
3) JP25V p. 19 SDRAM Voltage Selection
4) CPUSEL/CPUSEL1 p. 20 CPU Selection
5) CLRTC p. 20 Clear RTC RAM
Expansion Slots/Sockets
1) DDR DIMM 1/2 p. 21 System Memory Support
SDR DIMM 1/2/3
2) Socket 370 p. 23 CPU Support
3) PCI 1/2/3/4/5 p. 25 32-bit PCI Bus Expansion Slots
4) AGP Pro p. 27 Accelerated Graphics Port Slot
5) AMR Slot p. 28 Audio Modem Riser Slot
External Connectors
1) PS2KBMS p. 29 PS/2 Mouse Port (6-pin female)
2) PS2KBMS p. 29 PS/2 Keyboard Port (6-pin female)
3) USB p. 29 Universal Serial Bus Ports 1&2(two4-pin female)
4) PRINTER p. 30 Parallel Port (25-pin female)
5) COM1/COM2 p. 30 Serial Ports (9-pin /10-1 pin male)
6) GAME_AUDIO (Top) p. 30 Game/MIDI Port (15-pin female)
7) GAME_AUDIO (Bottom) p. 31 Audio Connectors (1/8”jacks)
Internal Connectors
1) IDELED p. 32 IDE Activity LED (2-pin)
2) FLOPPY p. 32 Floppy Disk Drive Connector (34-pin)
3) PRIMARY IDE p. 33 IDE Connectors (Two 40-1 pin)
SECONDARY IDE
4) WOL_CON p. 34 Wake-On-LAN Connector (3-pin)
5) WOR p. 34 Wake-On-Ring Connector (2-pin)
6) CPU/PWR/CHA_FAN p. 35 CPU, Power, and Chassis Fan Connectors (four 3-pin)
7) USB1/USB2 p. 35 USB Headers (10-1 pin)
8) IR p. 36 Standard Infrared Module Connector (5-pin)
9) CHASSIS p. 36 Chassis Intrusion Lead (2-pin)
10) ATXPWR p. 37 ATX Power Supply Connector (20-pin)
11) SMB p. 37 SMBus Connector (5-1 pin)
12) AFPANEL p. 38 ASUS iPanel Connector (24-1 pin)
13) AUDIO_PANEL p. 38 Audio Panel Connector (10-1 pin)
Layout Contents
3. H/W SETUP

16 ASUS TUA266 User’s Manual
3. HARDWARE SETUP
Layout Contents
3. H/W SETUP
14) CD/AUX/MODEM p. 39 Internal Audio Connectors (4-1 pin)
15) MIC2 p. 39 Internal Microphone Connector (3-pin)
16) JTPWR p. 40 Power Supply Thermal Sensor (2-pin)
17) PWR.LED ( PANEL ) p. 41 System Power LED Lead (3-pin)
18) SPEAKER (PANEL) p. 41 System Warning Speaker Lead (4-pin)
19) MSG.LED (PANEL) p. 41 System Message LED Lead (2-pin)
20) SMI (PANEL) p. 41 System Management Interrupt Lead (2-pin)
21) PWR.SW (PANEL) p. 41 ATX / Soft-Off Switch Lead (2-pin)
22) RESET (PANEL) p. 41 Reset Switch Lead (2-pin)

ASUS TUA266 User’s Manual 17
3. HARDWARE SETUP
3.3 Hardware Setup Procedure
Complete the following steps before using your computer:
1. Check motherboard settings
2. Install memory modules
3. Install the Central Processing Unit (CPU)
4. Install Expansion Cards
5. Connect ribbon cables, panel wires, and power supply cables
6. Configure the BIOS parameter settings
3.4 Motherboard Settings
This section tells you how to change motherboard function settings through the
switches and/or jumpers.
3. H/W SETUP
Motherboard Settings
WARNING! Computer motherboards and expansion cards contain very delicate
Integrated Circuit (IC) chips. To avoid damaging them due to static electricity,
follow these precautions whenever you work on your computer.
1. Unplug the computer when working on the internal components.
2. Use a grounded wrist strap or touch a safely grounded object or to a metal
object,such asthepower supplycase, beforehandlingcomputercomponents.
3. Hold components by the edges and try not to touch the IC chips on them.
4. Wheneveryouuninstallanycomponent,placethecomponentsonagrounded
antistatic pad or in the bag that came with the components.
5. Beforeyouinstallorremoveanycomponent,ensurethattheATXpower
supply is switched off or the power cord is detached from the power
supply. Failure to do so may cause severe damage to the motherboard,
peripherals, and/or components.
(TIP:When lit, the onboard LED indicates that the system is in suspend or
soft-off mode, not powered OFF. See illustration below.)
TUA266 Onboard LED
ON OFF
Standby
Power Powered
Off
LED
TUA266
0 10 1

18 ASUS TUA266 User’s Manual
3. HARDWARE SETUP
3. H/W SETUP
Motherboard Settings
Motherboard Frequency Settings (DIPSwitches)
The motherboard frequency is adjusted through the DIP switches. The white block
represents the switch’s position. The illustration below shows all the switches in the
OFF position.
1) JumperFree™Mode (JEN)
This jumper allows you to enable or disable the JumperFree™mode. The
JumperFree™mode allows processor settings to be made through the BIOS
setup (see 4.4 Advanced Menu).
Setting JEN
Enable (JumperFree) [2-3] (default)
Disable (Jumper Mode) [1-2]
NOTE: In JumperFree™mode, set all DIP switches (DSW) to OFF.
TUA266 DIP Switch
1. Frequency Multiple
2. Frequency Multiple
3. Frequency Multiple
4. Frequency Multiple
DSW
ON
1234
OFF ON
TUA266
0 10 1
TUA266 Jumper Mode Setting
JEN
ON
1234
OFF ON
DSW
Jumper Free
(Default)
23
Jumper Mode
12
(Default)
TUA266
0 10 1

ASUS TUA266 User’s Manual 19
3. HARDWARE SETUP
3. H/W SETUP
Motherboard Settings
2) CPU External Frequency Selection (DIP_SW Switches 1–4)
This option tells the clock generator what frequency to send to the CPU and
SDRAM. This allows the selection of the CPU’s External frequency (or BUS
Clock). The BUS Clock multiplied by the Frequency Multiple equals the CPU’s
Internal frequency (the advertised CPU speed).
WARNING!Set theCPUfrequencyonly to the recommended settings. Frequencies
other than the recommended CPU bus frequencies are not guaranteed to be stable.
Overclocking the processor is not recommended. It may result in a slower speed.
TUA266
0 10 1
TUA266 CPU External
Frequency Selection
DSW
ON
1234
ON
1234
ON
1234
133MHz
133MHz
66MHz
100MHz 100MHz 100MHz
CPU
SDRAM→
→
3) SDRAM Voltage Selection (JP25V)
Thisjumperallowsyoutoselectthespecificvoltage supplied to the DDR DIMMs
for overclocking. The setting 1-2 allows for +2.5V, while setting 2-3 allows for
+2.6V. The default setting is 2.5V.
TUA266 JP25V
TUA266
0 10 1
+2.6V+2.5V
1223
JP25V
WARNING! Using a higher voltage may help when overclocking but may result
in shortening the computer components life. It is receommended that you keep
this jumper to its default setting.

20 ASUS TUA266 User’s Manual
3. HARDWARE SETUP
3. H/W SETUP
Motherboard Settings
5) Clear RTC RAM (CLRTC)
These solder points allow you to clear the Real Time Clock (RTC) RAM in
CMOS. You can clear the CMOS memory of date, time, and system setup
parameters by erasing the CMOS RTC RAM data. The RAM data in CMOS,
that include system setup information such as system passwords, is powered by
the onboard button cell battery.
To erase the RTC RAM:
1. Turn OFF the computer and unplug the power cord.
2. Remove the battery.
3. Short the solder points.
4. Re-install the battery.
5. Plug the power cord and turn ON the computer.
6. Hold down the <Del> key during the boot process and enter BIOS setup to
re-enter data.
TUA266 Clear RTC RAM
Short solder points
to Clear CMOS
CL_RTC
CR2032 3V
Lithium Cell
CMOS Power
TUA266
0 10 1
4) CPU Selection (CPUSEL, CPUSEL1)
These jumpers allow you to select the CPU type. The default setting for both
jumpers is 1-2 to select Intel CPUs.
TUA266 CPU Selection
TUA266
0 10 1
CYRIXINTEL
1223
CPUSEL1
CPUSEL
(Default)