ASUS TX97-L User Manual

R

TX97-L

Pentium® Motherboard

USER’S MANUAL

USER'S NOTICE

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 FOR A PAR­TICULAR PURPOSE. IN NO EVENT SHALL ASUS, ITS DIRECTORS, OFFICERS,
EMPLOYEES OR AGENTS 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 BUSI­NESS AND THE LIKE), EVEN IF ASUS HAS BEEN ADVISED 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, LANDesk, and Pentium are registered trademarks of Intel Corporation.

• IBM and OS/2 are registered trademarks of International Business Machines.

• Symbios is a registered trademark of Symbios Logic Corporation.

• Windows and MS-DOS are registered trademarks of Microsoft Corporation.

• Sound Blaster AWE32 and SB16 are trademarks of Creative Technology Ltd.

• Adobe and Acrobat are registered trademarks of Adobe Systems Incorporated.
The product name and revision number are both printed on the product itself. Manual revi-

sions 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 THAT MAY APPEAR IN THIS MANUAL, INCLUD­ING THE PRODUCTS AND SOFTWARE DESCRIBED IN IT.

Copyright © 1998 ASUSTeK COMPUTER INC. All Rights Reserved.

Product Name: ASUS TX97-L
Manual Revision: 1.01
Release Date: January 1998

2 ASUS TX97-L User’s Manual

ASUS CONTACT INFORMATION

ASUSTeK COMPUTER INC.

Marketing Info

Address: 150 Li-Te Road, Peitou, Taipei, Taiwan 112, ROC
Telephone: [phone]
Fax: [phone]
Email: [e-mail]

Technical Support

Fax: [phone]
BBS: [phone]
Email: [e-mail]
WWW: www.asus.com.tw
Gopher: gopher.asus.com.tw
FTP: ftp.asus.com.tw/pub/ASUS

ASUS COMPUTER INTERNATIONAL

Marketing Info

Address: 721 Charcot Avenue, San Jose, CA 95131, USA
Telephone: [phone]
Fax: [phone]
Email: [e-mail]

Technical Support

BBS: [phone]
Email: [e-mail]
WWW: www.asus.com

ASUS COMPUTER GmbH

Marketing Info

Address: Harkort Str. 25, 40880 Ratingen, BRD, Germany
Telephone: [phone]
Fax: [phone]
Email: [e-mail]

Technical Support

BBS: 49-2102-448690
Email: [e-mail]
Hotline: [phone]

ASUS TX97-L User’s Manual 3

CONTENTS

I. INTRODUCTION........................................................................... 7

How this manual is organized.......................................................... 7

Item Checklist .................................................................................. 7

II. FEATURES .................................................................................... 8

Features of the ASUS TX97-L Motherboard................................... 8

Introduction to ASUS Smart Series of motherboards........... 9

Parts of the ASUS TX97-L Motherboard ........................................ 11

III. INSTALLATION .......................................................................... 12

ASUS TX97-L Motherboard Layout ............................................... 12

Installation Steps.............................................................................. 14

1. Jumpers ........................................................................................ 14

Jumper Settings .................................................................... 15

Compatible Cyrix CPU Identification .................................. 18

2. System Memory (DIMM) ........................................................... 19

DIMM Memory Installation ................................................. 21

3. Central Processing Unit (CPU)................................................... 22

4. Expansion Cards ......................................................................... 23

Expansion Card Installation Procedure: ............................... 23

Assigning IRQs for Expansion Cards................................... 23

Assigning DMA Channels for ISA Cards............................. 24

ISA Cards and Hardware Monitor........................................ 24

5. External Connectors.................................................................... 25

Power Connection Procedures ................................................... 33

IV. BIOS SOFTWARE ....................................................................... 34

Support Software ............................................................................. 34

Flash Memory Writer Utility...................................................... 34

Main Menu ........................................................................... 34

Advanced Features Menu ..................................................... 35

Managing & Updating your Motherboard’s BIOS..................... 36

6. BIOS Setup ................................................................................. 37

Load Defaults ....................................................................... 38

Standard CMOS Setup ............................................................... 38

Details of Standard CMOS Setup......................................... 38

BIOS Features Setup .................................................................. 41

Details of BIOS Features Setup............................................ 41

Chipset Features Setup ............................................................... 43

Details of Chipset Features Setup......................................... 43

Power Management Setup.......................................................... 46

Details of Power Management Setup ................................... 46

PNP and PCI Setup .................................................................... 48

4 ASUS TX97-L User’s Manual

CONTENTS

Details of PNP and PCI Setup .............................................. 49

Load BIOS Defaults ................................................................... 50

Load Setup Defaults ................................................................... 50

Supervisor Password and User Password .................................. 51

IDE HDD Auto Detection .......................................................... 52

Save & Exit Setup ...................................................................... 53

Exit Without Saving ................................................................... 53

ASUS Smart Motherboard Support CD 3.10................................... 55

Desktop Management Interface (DMI)............................................ 56

Introducing the ASUS DMI Configuration Utility ............... 56

System Requirements ........................................................... 56

Using the ASUS DMI Configuration Utility ........................ 57

VI. ASUS PCI SCSI Cards ................................................................ 59

Symbios SCSI BIOS and Drivers .................................................... 59

ASUS PCI-SC200 & PCI-SC860 SCSI Cards ................................ 59

Setting Up the ASUS PCI-SC200 & PCI-SC860....................... 60

Setting the INT Assignment for the ASUS PCI-SC200 ............. 60

Terminator Requirements for SCSI Devices .............................. 60

Terminator Settings for the ASUS PCI-SC860 .......................... 61

Terminator Settings for the ASUS PCI-SC200 .......................... 61

SCSI ID Numbers for SCSI Devices ......................................... 62

SCSI ID Priority......................................................................... 62

VII. ASUS LAN Card......................................................................... 63

ASUS PCI-L101 Fast Ethernet Card ............................................... 63

Features ............................................................................................ 64

Software Driver Support ............................................................ 64

Question and Answer ................................................................. 64

ASUS TX97-L User’s Manual 5

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! The use of shielded cables for connection of the monitor to the

graphics card is required to assure compliance with FCC regulations. Changes
or modifications to this unit not expressly approved by the party responsible for
compliance could void the user’s authority to operate this equipment.

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.

6 ASUS TX97-L User’s Manual

I. INTRODUCTION

How this manual is organized

This manual is divided into the following sections:

I. Introduction: Manual information and checklist
II. Features: Information and specifications concerning this product
III. Installation: Instructions on setting up the motherboard
IV. BIOS Software: Instructions on setting up the BIOS software
V. Support Software: Information on the included support software
VI. ASUS SCSI Cards: Installation of ASUS SCSI cards (optional)
VII. ASUS L101 Card: Installation of the ASUS LAN card (optional)

Item Checklist

Please check that your package is complete. If you discover damaged or missing
items, please contact your retailer.

(1) ASUS Motherboard

I. INTRODUCTION

(Sections/Checklist)

(1) 9pin male serial + 25pin male serial external connector set
(1) 25pin female parallel + 6pin female PS/2 mouse external connector set
(1) IDE ribbon cable for master and slave drives
(1) Floppy ribbon cable for (1) 5.25inch floppy and (2) 3.5inch floppies
(1) bag of spare jumpers
(1) diskette or CD with support drivers and utilities:

• Flash Memory Writer utility to update the onboard programmable BIOS

• Desktop Management Interface (DMI) utility

• LANDesk Client Manager (LDCM) Software (with optional onboard LM78)

• Readme files for descriptions and use of the files

• Technical Support Form
(1) User’s Manual
PS/2 Mouse, Infrared, USB1, and USB2 external connector module (optional)
ASUS PCI-SC200 Fast-SCSI or PCI-SC860 Ultra-Fast SCSI card (optional)

ASUS PCI-L101 Wake-on-LAN 10/100 Ethernet Card (optional)

ASUS TX97-L User’s Manual 7

II. FEATURES

(Features)

II. FEATURES

Features of the ASUS TX97-L Motherboard

The ASUS TX97-L is carefully designed for the demanding PC user who wants
many intelligent features in a small package. This motherboard:

• Intel Chipset: Features Intel’s 430TX PCIset with I/O subsystems.

• Multi-Processor/Multi-Speed Support: Intel Pentium

®

P54C/P54CS), IBM
(PR166 & faster), AMD-K5™ (PR75–PR133), AMD-K6™ (PR166 & faster).

• V ersatile Memory Support: Is equipped with three DIMM sockets to support

8-256MB 168-pin 3.3Volt SDRAM/EDO memory modules up to 256MB.

• Easy Installation: Is equipped with BIOS that supports auto detection of hard

drives, PS/2 mouse, and Plug and Play devices to make setup of hard drives,
expansion cards, and other devices virtually automatic.

• Dual Power Supply: Has both AT and ATX power connectors onboard to sup-

port an AT or ATX power supply with soft-on/off features.

• ISA and PCI Expansion Slots: Provides three 16-bit ISA slots and four 32-bit

PCI slots.

/Cyrix® 6x86-PR166+ (Rev 2.7 or later), IBM®/Cyrix® 6x86MX

®

75–233MHz (P55C-MMX™,

™

• Super Multi-I/O: Provides two high-speed UART compatible serial ports and

one parallel port with EPP and ECP capabilities. UART2 can also be directed
from COM2 to the Infrared Module for wireless connections.

• Desktop Management Interface (DMI): Supports DMI through BIOS which

allows hardware to communicate within a standard protocol creating a higher
level of compatibility. (Requires DMI-enabled components.) (See section V)

• PCI Bus Master IDE Controller: Comes with an onboard PCI Bus Master

IDE controller with two connectors that supports four IDE devices in two chan­nels, supports PIO Modes 3 and 4 and Bus Master IDE DMA Mode 2, and
supports Enhanced IDE devices such as Tape Backup and CD-ROM drives.
Supports two drives of either 5.25-inch (360KB or 1.2MB) or 3.5-inch (720KB,

1.44MB, or 2.88MB) disk drives. Supports Japanese “Floppy 3 mode” (3.5­inch disk drive: 1.2MB) and LS-120 floppy disk drives (3.5-inch disk drive: 120
MB, 1.44MB, 720K). BIOS supports IDE CD-ROM or SCSI device boot-up.

• Level 2 Cache: 512KB Pipelined Burst SRAM onboard.

• Optional PS/2 Mouse, USB, IrDA Connector: Supports an optional cable and bracket

set to mount the connectors to an unused expansion slot on the system chassis. A
second IrDA connector is available for a standard individual infrared cable set.

• Symbios SCSI BIOS: Supports optional ASUS SCSI controller cards through

onboard firmware.

• Wake on LAN: Supports Wake on LAN activity through optional ASUS PCI-

L101 Fast Ethernet card.

8 ASUS TX97-L User’s Manual

II. FEATURES

Introduction to ASUS Smart Series of motherboards

Performance

• SDRAM Optimized Performance - ASUS TX97 series of motherboards sup-

port the new generation memory - Synchronous Dynamic Random Access
Memory (SDRAM) which increases the data transfer rate from 264MB/s max
using EDO memory to 528MB/s max using SDRAM.

• Double the IDE Transfer Speed - ASUS TX97 series of motherboards with

Intel 430TX PCIset improves IDE transfer rate using Bus Master UltraDMA/33
IDE which can handle data transfer up to 33MB/s. The best of all is that this
new technology is compatible with existing ATA-2 IDE specs so there is no
need to upgrade current hard drives or cables.

• Concurrent PCI - Concurrent PCI allows multiple PCI transfers from PCI master

busses to memory to CPU.

(Smart Series)

II. FEATURES

• ACPI Ready - ACPI (Advanced Configuration and Power Interface) is also

implemented on all ASUS 430TX series of motherboards. ACPI provide more
Energy Saving Features for the future operating systems (OS) supporting OS
Direct Power Management (OSPM) functionality. With these features imple­mented in the OS, PCs can be ready around the clock everyday, yet satisfy all
the energy saving standards. To fully utilize the benefits of ACPI, an ACPI­supported OS such as in the next release of Windows 95 must be used.

• PC ’97 Compliant - Both the BIOS and hardware levels of ASUS TX97 series

of motherboards meet PC ’97 compliancy. The new PC 97 requirements for
systems and components are based on the following high-level goals: Support
for Plug and Play compatibility and power management for configuring and
managing all system components, and 32-bit device drivers and installation pro­cedures for both Windows 95 and Windows NT.

Intelligence: (with optional LM78/75 Hardware Monitor only)

• Fan Status Monitoring and Alarm - To prevent system overheat and system

damage, the CPU fan and system fans are monitored for RPM and failure. Each
fan can be set for its normal RPM range and alarm thresholds.

• Temperature Monitoring and Alert - To prevent system overheat and system

damage, there is a heat sensor under the CPU and on the motherboard itself to
monitor CPU and system temperature to make sure the system is operating at a
safe heat level to avoid any failures triggered by extremely high temperature.

ASUS TX97-L User’s Manual 9

• Voltage Monitoring and Alert - System voltage levels are monitored to ensure

• System Resources Alert - T oday’ s operating systems such as W indows 95, W in-

II. FEATURES

(TX97 Series)

• CPU Slow Down - When CPU fans or system fans are malfunctioning, the

II. FEATURES

stable current to critical motherboard components. Voltage specifications are
more critical for future processors, so monitoring is necessary to ensure proper
system configuration and management.

dows NT , and OS/2, require much more memory and hard drive space to present
enormous user interfaces and run large applications. The system resource moni­tor will warn the user before the system resources are used up to prevent pos­sible application crashes. Suggestions will give the user information on manag­ing their limited resources more efficiently.

system will deactivate the CPU Clock line to decrease CPU utilization to the
speed upon detection of system overheat. This will prevent CPU damage from
system overheat. The CPU utilization will restore normal operations when tem­perature falls below a safe level.

• Auto Fan Off - The system fans will power off automatically even in sleep
mode. This function reduces both energy consumption and system noise, and

is a important feature to implement silent PC systems.

• Dual Function Power Button (requir es ATX power supply) - The system can
be in one of two states, one is Sleep mode and the other is the Soft-Off mode.
Pushing the power button for less than 4 seconds places the system into Sleep
mode. When the power button is pressed for more than 4 seconds, it enters the
Soft-Off mode.

• Remote Ring On (requires ATX power supply) - This allows a computer to be
turned on remotely through a modem. With this benefit on-hand, any user can
access vital information from their computer from anywhere in the world!

• Message LED - Chassis LEDs now act as information providers. Through the
way a particular LED illuminates, the user can determine the stage the computer
is in. A simple glimpse provides useful information to the user.

10 ASUS TX97-L User’s Manual

II. FEATURES

Parts of the ASUS TX97-L Motherboard

Programmable

Hardware Monitor
Thermal Sensor

3 ISA Slots
4 PCI Slots

IDE Connectors

AT Power
Connector

PS/2 Mouse, USB, IrDA

Super Multi-I/O

Flash ROM

Serial, Parallel, Floppy

II. FEATURES

(Motherboard Parts)

ATX Power

3 DIMM Sockets
Intel’s 430TX

PCIset

Thermal Sensor
CPU ZIF

Socket 7

“Cool” Switching Voltage Regulators

512KB Pipelined
Burst L2 Cache

ASUS TX97-L User’s Manual 11

III. INSTALLATION

ASUS TX97-L Motherboard Layout

Boot Block
Write

Thermal
Sensor

ISA Slot 3

(Motherboard Layout)

III. INSTALLATION

Hardware
Monitor

LM78

ISA Slot 2

ISA Slot 1

CPU Fan

PS/2 Mouse,
USB, IrDA

ASIC

RTC Clear

Multi-I/O

ASUS

Intel
PIIX4
PCIset

Super

PCI Slot 4

System BIOS
Flash EEPROM

PCI Slot 3

PCI Slot 2

CR2032 3V
Lithium Cell

BIOS Power

Serial Ports

Wake on LAN

PCI Slot 1

COM 1
COM 2

Power Fan

Secondary IDE

Primary IDE

Intel
430TX
PCIset

Key­board

Keyboard
Power

Parallel (Printer) Port

Floppy Drives

P9

AT Power Input

DIMM Socket 2 (64-bit, 168-pin module)

DIMM Socket 3 (64-bit, 168-pin module)

P8

ATX Power Input

DIMM Socket 1 (64-bit, 168-pin module)

Chasis Open Alarm

Infrared

Switching Voltage
Regulators

IDE LED

Panel Connectors

BF2
BF1
BF0

Freq. Ratio

Chassis
Fan

VID2
VID1
VID0

CPU Voltage

Thermal
Sensor

CPU ZIF Socket 7

512KB PB

L2 Cache

R

12 ASUS TX97-L User’s Manual

Row

FS1

FS0

FS2

Clock Freq

54

32

10

III. INSTALLATION

Jumpers

1) BBLKW p. 15 Flash ROM Boot Block Program (Disable/Enable)

2) CLRTC p. 15 Real Time Clock RAM (Clear Data)

3) KBWK p. 16 Keyboard Power Up (Enable/Disable)

4) FS0, FS1, FS2 p. 16 CPU External Clock (BUS) Frequency Selection

5) BF0, BF1, BF2 p. 16 CPU:BUS Frequency Ratio

6) VID0, VID1, VID2 p. 18 CPU Voltage Selection

Expansion Slots

1) DIMM Sockets p. 19 168-Pin DIMM Memory Expansion Sockets

2) CPU ZIF Socket 7 p. 22 Central Processing Unit (CPU) Socket

3) SLOT 1, 2, 3 p. 23 16-bit ISA Bus Expansion Slots

4) PCI 1 , 2, 3, 4 p. 23 32-bit PCI Bus Expansion Slots

Connectors

*

1) KB p. 25 Keyboard Connector (5-pin Female)

2) FLOPPY p. 25 Floppy Drive Connector (34-1pin Block)

3) PRINTER p. 26 Parallel (Printer) Port Connector (26-1pin Block)

4) COM1, COM2 p. 26 Serial Port COM1 & COM2 (10-1pin Blocks)

5) FAN p. 27 Power Supply, Chassis, CPU Fan Power Leads

6) CHASSIS p. 27 Chassis Open Alarm Lead (4-1pin Block)

7) Primary / Second IDE p. 28 Primary / Secondary IDE Connector (40-1pin Blocks)

8) IDELED p. 2 8 IDE LED Activity Light

9) ATX POWER p. 29 ATX Motherboard Power Connector (20-pin Block)

10) AT POWER p. 29 AT Motherboard Power Connector (12-pin Block)

11) USBIRMS p. 31 PS/2 Mouse/USB/IR Combo-Connector (18-1pin Block)

12) IR p. 31 Second Infrared Port Module Connector (5-pin Block)

13) MSG.LED (PANEL) p. 31 System Message LED (2 pins)

14) SMI (PANEL) p. 31 SMI Switch Lead (2 pins)

15) PWR SW. (PANEL) p. 31 ATX Power & Soft-Off Switch Lead (2 pins)

16) RESET (PANEL) p. 31 Reset Switch Lead (2 pins)

17)

PWR.LED (

18)

KEYLOCK (

19) SPEAKER (PANEL) p. 31 Speaker Output Connector (4 pins)

20) W0LCON p. 32 Wake on LAN Activity Connector (3-pins)

PANEL

PANEL

)

p. 31 System Power LED Lead (3 pins)

)

p. 31 Keyboard Lock Switch Lead (2 pins)

(Map of Board)

III. INSTALLATION

*

The onboard hardware monitor uses the address 290H-297H so legacy ISA cards

must not use this address or else conflicts will occur.

ASUS TX97-L User’s Manual 13

III. INSTALLATION

III. INSTALLATION

Installation Steps

Before using your computer, you must complete the following steps:

1. Set Jumpers on the Motherboard

2. Install System Memory Modules

3. Install the Central Processing Unit (CPU)

4. Install Expansion Cards

5. Connect Ribbon Cables, Cabinet Wires, and Power Supply

6. Setup the BIOS Software

1. Jumpers

Several hardware settings are made through the use of jumper caps to connect jumper
pins (JP) on the motherboard. See motherboard layout for locations of jumpers. The
jumper settings will be described numerically, such as [----], [1-2], [2-3] for no con-

(Jumpers)

nection, connect pins 1&2, and connect pins 2&3 respectively. Pin 1 for our mother­boards is always on top
the keyboard connector away from yourself. A “1” is written besides pin 1 on jumpers
with three pins. The jumpers will also be shown graphically such as to connect
pins 1&2 and to connect pins 2&3. Jumpers with two pins will be shown as

for Short (On) and for Open (Off). For manufacturing simplicity , the jump­ers may be sharing pins from other groups. Use the diagrams in this manual instead of
following the pin layout on the board. Settings with two jumper numbers require that
both jumpers be moved together. To connect the pins, simply place a plastic jumper
cap over the two pins as diagramed.

WARNING! Computer motherboards , baseboards and components, such as SCSI

cards, contain very delicate Integrated Circuit (IC) chips. To protect them against
damage from static electricity , you should follow some precautions whenever you
work on your computer .

1. Unplug your computer when working on the inside.

or on the left when holding the motherboard with

2. Use a grounded wrist strap before handling computer components. If you do
not have one, touch both of your hands to a safely grounded object or to a
metal object, such as the power supply case.

3. Hold components by the edges and try not to touch the IC chips, leads or
connectors, or other components.

4. Place components on a grounded antistatic pad or on the bag that came with
the component whenever the components are separated from the system.

14 ASUS TX97-L User’s Manual

III. INSTALLATION

Jumper Settings

1. Flash ROM Boot Block Programming (BBLKW)

This sets the operation mode of the boot block area of the Programmable Flash
ROM to allow programming in the Enabled position. This is required only if
prompted by the Flash Memory Writer Utility as shown in BIOS SOFTW ARE.

Programming BBLKW

Disabled [1-2] (Default)
Enabled [2-3]

BBLKW

1
2
3

Disabled/Protect
(Default)

Thermal
Sensor

R

BBLKW

1
2
3

Enabled

Boot Block Programming

2. Real Time Clock (RTC) RAM (CLRTC)

The CMOS RAM is powered by the onboard button cell battery. To clear the
RTC data: (1) Turn off your computer, (2) Short solder points, (3) Turn on your
computer, (4) Hold down <Delete> during bootup and enter BIOS setup to re­enter user preferences.

RTC RAM CLRTC

Clear Data [short solder pointS (Position R73) momentarily]

(Jumpers)

III. INSTALLATION

Thermal
Sensor

R

RTC RAM (Clear Data)

ASUS TX97-L User’s Manual 15

CLRTC

Short solder points
to Clear Data

III. INSTALLATION

3. Keyboard Power Up (KBWK) (Reserved for future use)

Set this jumper to Enable if you wish to use your keyboard to power up your
system. Requires an ATX power supply that can supply at least 300mAmp on
the +5VSB lead and new BIOS support. The default is set to Disable because
your system will not function withtout the proper ATX power supply.

Setting KBWK

Disable [1-2] (default)
Enable [2-3]

III. INSTALLATION

(Jumpers)

KBWK

1
2
3

Enable

Thermal
Sensor

Keyboard Power

KBWK

1
2
3

Disable

(Default)

R

4. CPU External (BUS) Frequency Selection (FS0, FS1, FS2)

These jumpers tell the clock generator what frequency to send to the CPU. These
allow the selection of the CPU’ s External frequency (or BUS Clock). The BUS Clock
times the BUS Ratio equals the CPU's Internal frequency (the advertised CPU speed).

5. CPU to BUS Frequency Ratio (BF0, BF1, BF2)

These jumpers set the frequency ratio between the Internal frequency of the CPU
and the External frequency (called the BUS Clock) within the CPU. These must
be set together with the above jumpers CPU External (BUS) Frequency Selection.

WARNING! Frequencies above 66MHz exceed the specifications for the

onboard Intel Chipset and are not guaranteed to be stable.

16 ASUS TX97-L User’s Manual

III. INSTALLATION

FS2

FS1

FS0

FS0

FS1

FS2

FS0

FS1

FS2

FS0

FS1

FS2

FS0

FS1

FS2

FS0

FS1

FS2

1
2
3

50MHz

1
2
3

55MHz

1
2
3

60MHz

1
2
3

66MHz

1
2
3

75MHz

1
2
3

83MHz

CPU External Clock (BUS) Frequency Selection

Thermal
Sensor

R

Match the table’s Ratio column
to these CPU types:

CPU A
CPU B
CPU C
CPU D
CPU E

BF2
BF1
BF0

123

1.5x(3/2)

3.5x(7/2)

3.0x(3/1)

3.0x(3/1)

3.5x(7/2)

123

2.0x(2/1)

2.0x(2/1)

2.0x(2/1)

2.0x(2/1)

2.0x(2/1)

CPU : BUS Frequency Ratio

123

2.5x(5/2)

2.5x(5/2)

1.0x(1/1)

2.0x(2/1)

2.5x(5/2)

123

3.0x(3/1)

3.0x(3/1)

----

----

3.0x(3/1)

123

----

----

----

----

4.0X(4/1)

123

----

----

----

----

(4.5X)(9/2)

Set the jumpers by the Internal speed of the Intel, AMD, IBM, or Cyrix CPU as follows:

(BUS Freq.) (Freq. Ratio)

CPU Model Freq. Ratio BUS F. FS0 FS1 FS2 BF2 BF1 BF0

Intel Pentium P54C 166MHz A-2.5x 66MHz [1-2] [2-3] [2-3] [----] [2-3] [2-3]
Intel Pentium P54C 150MHz A-2.5x 60MHz [2-3] [2-3] [2-3] [----] [2-3] [2-3]
Intel Pentium P54C 133MHz A-2.0x 66MHz [1-2] [2-3] [2-3] [----] [1-2] [2-3]
Intel Pentium P54C 120MHz A-2.0x 60MHz [2-3] [2-3] [2-3] [----] [1-2] [2-3]
Intel Pentium P54C 100MHz A-1.5x 66MHz [1-2] [2-3] [2-3] [----] [1-2] [1-2]
Intel Pentium P54C 90MHz A-1.5x 60MHz [2-3] [2-3] [2-3] [----] [1-2] [1-2]
Intel Pentium P54C 75MHz A-1.5x 50MHz [2-3] [1-2] [2-3] [----] [1-2] [1-2]

(Jumpers)

III. INSTALLATION

AMD-K5-PR133 100MHz A-1.5x 66MHz [1-2] [2-3] [2-3] [----] [1-2] [1-2]
AMD-K5-PR120 90MHz A-1.5x 60MHz [2-3] [2-3] [2-3] [----] [1-2] [1-2]
AMD-K5-PR100 100MHz A-1.5x 66MHz [1-2] [2-3] [2-3] [----] [1-2] [1-2]
AMD-K5-PR90 90MHz A-1.5x 60MHz [2-3] [2-3] [2-3] [----] [1-2] [1-2]
AMD-K5-PR75 75MHz A-1.5x 50MHz [2-3] [1-2] [2-3] [----] [1-2] [1-2]

Intel Pentium P55C 233MHz B-3.5x 66MHz [1-2] [2-3] [2-3] [----] [1-2] [1-2]
Intel Pentium P55C 200MHz B-3.0x 66MHz [1-2] [2-3] [2-3] [----] [2-3] [1-2]
Intel Pentium P55C 166MHz B-2.5x 66MHz [1-2] [2-3] [2-3] [----] [2-3] [2-3]

IBM/Cyrix 6x86MX-PR233 200MHz B-3.0x 66MHz [1-2] [2-3] [2-3] [----] [2-3] [1-2]
IBM/Cyrix 6x86MX-PR200 166MHz B-2.5x 66MHz [1-2] [2-3] [2-3] [----] [2-3] [2-3]
IBM/Cyrix 6x86MX-PR166 150MHz B-2.5x 60MHz [2-3] [2-3] [2-3] [----] [2-3] [2-3]

*IBM/Cyrix 6x86-PR166+ 133MHz C-2.0x 66MHz [1-2] [2-3] [2-3] [----] [1-2] [2-3]
*IBM/Cyrix 6x86L-PR166+ 133MHz D-2.0x 66MHz [1-2] [2-3] [2-3] [----] [1-2] [2-3]

AMD-K6-PR233 233MHz E-3.5x 66MHz [1-2] [2-3] [2-3] [----] [1-2] [1-2]
AMD-K6-PR200 200MHz E-3.0x 66MHz [1-2] [2-3] [2-3] [----] [2-3] [1-2]
AMD-K6-PR166 166MHz E-2.5x 66MHz [1-2] [2-3] [2-3] [----] [2-3] [2-3]

*NOTE: The only IBM or Cyrix 6x86(L) (or M1) that is supported on this motherboard is revision 2.7
or later. (see next page).

ASUS TX97-L User’s Manual 17

III. INSTALLATION

Compatible Cyrix CPU Identification

The only Cyrix 6x86-PR166+ CPU that is supported on this
motherboard must be Revision 2.7 or later . Look on the un­derside of the CPU for the serial number . The number should
read G8DC6620A or later.

6. Voltage Regulator Output Selection (VID0, 1, 2)

These jumpers set the voltage supplied to the CPU. Switching regulators allow
some jumper settings to be the same for two voltages of different power planes.

III. INSTALLATION

(Jumpers)

Pentium MMX (P55C)
(150MHz-233MHz)

Intel Pentium (P54C)
(75MHz-200MHz)

AMD-K6
(PR166 and faster)

AMD-K5
(PR75-PR133)

IBM/Cyrix 6x86(MX)
(PR166 and faster)

IBM/Cyrix 6x86(M1)
(PR166 and faster)

WARNING! Because CPU designs change rapidly, the table below is only in-

tended as a simple guideline and thus may not be true for your CPU. Always
refer to the CPU documentation for your CPU’s voltage and then set the appro­priate VID jumpers according to the illustration below.

Manufacturer CPU Type Single Plane Dual Plane VID0 VID1 VID2

Intel P54C/P54CS 3.5V(VRE) ---- [1-2] [2-3] [2-3]
AMD K5 3.5V(VRE) ---- [1-2] [2-3] [2-3]
IBM/Cyrix 6x86 3.5V(VRE) ---- [1-2] [2-3] [2-3]
Intel P54C/P54CS 3.4V(STD) ---- [2-3] [2-3] [2-3]
AMD K5 3.4V(STD) ---- [2-3] [2-3] [2-3]
AMD (.35micron) K6-PR233 ---- 3.2V(Dual) [2-3] [2-3] [1-2]
AMD (.35micron) K6-166,200 ---- 2.9V(Dual) [1-2] [2-3] [2-3]
IBM/Cyrix 6x86MX ---- 2.9V(Dual) [1-2] [2-3] [2-3]
Intel P55C-MMX ---- 2.8V(Dual) [2-3] [2-3] [2-3]

AMD (.25micron) K6-233,266,300 ---- 2.2V(Dual) [----] [1-2] [----]

VID0

VID0

VID1

VID2

VID0

VID1

VID2

VID0

VID1

VID2

VID0

VID1

VID2

VID1

VID2

VID0

VID1

VID2

Thermal
Sensor

R

CPU Vcore Voltage Selection

1
2
3

2.0Volts

1
2
3

2.5Volts

1
2
3

3.0Volts

1
2
3

2.1Volts

1
2
3

2.6Volts

1
2
3

3.1Volts
Dual Plane CPU

1
2
3

2.2Volts

1
2
3

2.7Volts

1
2
3

3.2Volts

1
2
3

2.3Volts

1
2
3

2.8Volts

1
2
3

3.3Volts

18 ASUS TX97-L User’s Manual

1
2
3

2.4Volts

1
2
3

2.9Volts

1
2
3

3.4V (STD)

1
2
3

3.5V (VRE)

Single Plane

III. INSTALLATION

2. System Memory (DIMM)

This motherboard has three sockets to support 3.3Volt (power level) Unbuffered
Synchronous DRAMs (SDRAM) DIMMs of either 8, 16, or 32, 64, 128, or 256MB.
Maximum memory of DIMMs must be 256MB or less.

IMPORTANT: Memory speed setup is required through "Auto Configuration" in

BIOS Chipset Setup of the BIOS SOFTWARE.

Install memory in any combination as follows:

DIMM Type 168-pin DIMM Memory Modules Total Memory
Socket 1 SDRAM/EDO8MB, 16MB, 32MB x1

SDRAM/EDO64, 128, 256MB - Slot 3 must be empty

Socket 2 SDRAM/EDO 8MB, 16MB, 32MB x1

SDRAM/EDO 64, 128, 256MB - Slot 3 must be empty

Socket 3 SDRAM/EDO 8MB, 16MB, 32MB - Slot 1 or 2 must x1

not have 64, 128, or 256MB SDRAM

Total System Memory (Max 256MB) =

WARNING: Memory modules must have 18 chips or less. Memory modules with

more that 18 chips will case unstable operation.

NOTE:

• Maximum memory size is 256MB total for all sockets.

• Socket 3 will not support 64, 128, or 256MB DIMMs with 64Mbit SDRAM cells.

• If Socket 1 and/or Socket 2 has 64, 128, or 256MB DIMM’s with 64Mbit SDRAM
cells, Socket 3 must be empty.

(System Memory)

III. INSTALLATION

ASUS TX97-L User’s Manual 19

III. INSTALLATION

(This page was intentionally left blank)

20 ASUS TX97-L User’s Manual