Asus TX97-N User manual

R
TX97-N
Pentium®NLX Motherboard
USER’S MANUAL

ASUS TX97-N User’s Manual
2
USER’S NOTICE
Product Name: ASUS TX97-N
Manual Revision: 1.04
Release Date: January 1998
No part of this manual, including the products and software described in it, may be repro-
duced, 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 MERCHANTABILITYOR FITNESS FORAPAR-
TICULAR PURPOSE. IN NO EVENT SHALL ASUS, ITS DIRECTORS, OFFICERS,
EMPLOYEES OR AGENTS BE LIABLE FOR ANY INDIRECT, SPECIAL, INCIDEN-
TAL, OR CONSEQUENTIAL DAMAGES (INCLUDING DAMAGES FOR LOSS OF
PROFITS, LOSS OF BUSINESS, LOSS OF USE OR DATA, INTERRUPTION OF BUSI-
NESS 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 byASUS; 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 trade-
marks 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.
Forprevious orupdated manuals,BIOS, drivers,or productrelease information,contactASUS
at http://www.asus.com.tw or through any of the means indicated on the following page.
SPECIFICATIONS AND INFORMATION CONTAINED IN THIS MANUALARE FUR-
NISHED FOR INFORMATIONAL USE ONLY, AND ARE SUBJECT TO CHANGE AT
ANY TIME WITHOUT NOTICE, AND SHOULD NOT BE CONSTRUED AS A COM-
MITMENT BY ASUS. ASUS ASSUMES NO RESPONSIBILITY OR LIABILITY FOR
ANYERRORS ORINACCURACIESTHATMAYAPPEARINTHIS MANUAL,INCLUD-
ING THE PRODUCTS AND SOFTWARE DESCRIBED IN IT.
Copyright © 1998 ASUSTeK COMPUTER INC. All Rights Reserved.

ASUS TX97-N User’s Manual 3
ASUS CONTACT INFORMATION
ASUSTeK COMPUTER INC.
Marketing Info
Address: 150 Li-Te Road, Peitou, Taipei, Taiwan 112, ROC
Telephone: [phone]
Fax: [phone]
Email: [email protected]
Technical Support
Fax: [phone]
BBS: [phone]
Email: [email protected]
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: [email protected]
Technical Support
BBS: [phone]
Email: [email protected]
WWW: www.asus.com
ASUS COMPUTER GmbH
Marketing Info
Address: Harkort Str. 25, 40880 Ratingen, BRD, Germany
Telephone: [phone]
Fax: [phone]
Email: [email protected]
Technical Support
Hotline: [phone]
BBS: 49-2102-448690
Email: [email protected]
WWW: www.asuscom.de
FTP: ftp.asuscom.de/pub/ASUSCOM

ASUS TX97-N User’s Manual
4
CONTENTS
I. INTRODUCTION...........................................................................7
How this manual is organized..........................................................7
Item Checklist ..................................................................................7
II. FEATURES ....................................................................................8
Features of the ASUS TX97-N Motherboard ..................................8
Parts of the ASUS TX97-N Motherboard ..................................9
Riser Card Front .........................................................................9
Riser Card Back .........................................................................9
III. INSTALLATION ........................................................................10
ASUS TX97-N Motherboard Layout ............................................10
Installation Steps............................................................................12
1. Jumpers ......................................................................................12
Jumper Settings ..................................................................13
2. System Memory (DIMM) .........................................................17
DIMM Memory Installation Procedures: ...........................18
3. Central Processing Unit (CPU).................................................19
4. Expansion Cards .......................................................................20
Expansion Card Installation Procedure: .............................20
Assigning IRQs for Expansion Cards.................................20
Assigning DMA Channels for ISA Cards...........................21
ISA Cards and Hardware Monitor......................................21
5. External Connectors..................................................................22
Front Panel Descriptions ..........................................................27
Power Connection Procedures .................................................31
Main Menu .........................................................................32
Support Software ...........................................................................32
Flash Memory Writer Utility....................................................32
Advanced Features Menu ...................................................33
Managing and Updating Your Motherboard’s BIOS................34
6. BIOS Setup ...............................................................................35
Load Defaults .....................................................................36
Standard CMOS Setup .............................................................36
Details of Standard CMOS Setup:......................................37
BIOS Features Setup ................................................................39
Details of BIOS Features Setup..........................................39
Chipset Features Setup .............................................................41
Details of Chipset Features Setup.......................................41
Power Management Setup........................................................44
Details of Power Management Setup .................................44

ASUS TX97-N User’s Manual 5
CONTENTS
PNP and PCI Setup ..................................................................46
Details of PNP and PCI Setup ............................................46
Load BIOS Defaults .................................................................48
Load Setup Defaults .................................................................48
Supervisor Password and User Password ................................49
IDE HDD Auto Detection ........................................................50
Save and Exit Setup .................................................................51
Exit Without Saving .................................................................51
V. SUPPORT SOFTWARE..............................................................52
Desktop Management Interface (DMI)..........................................52
Introducing the ASUS DMI Configuration Utility.............52
System Requirements .........................................................52
Using the ASUS DMI Configuration Utility ......................53
Notes...................................................................................53
VI. ASUS PCI SCSI Cards ..............................................................55
Symbios SCSI BIOS and Drivers ..................................................55
ASUS PCI-SC200 & PCI-SC860 SCSI Cards ..............................55
Setting Up the ASUS PCI-SC200 & PCI-SC860.....................56
Setting the INTAssignment for the ASUS PCI-SC200 ...........56
Terminator Requirements for SCSI Devices............................56
Terminator Settings for the ASUS PCI-SC860 ........................57
Terminator Settings for the ASUS PCI-SC200 ........................57
SCSI ID Numbers for SCSI Devices .......................................58
SCSI ID Priority.......................................................................58
VII. ASUS LAN Card.......................................................................59
ASUS PCI-L101 Fast Ethernet Card .............................................59
Features ....................................................................................60
Drivers Supported ....................................................................60
Question and Answer ...............................................................60

ASUS TX97-N User’s Manual
6
FCC & DOC COMPLIANCE
FederalCommunications CommissionStatement
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 installa-
tion. 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 inter-
ference 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.
CanadianDepartment ofCommunications 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 Cana-
dian Department of Communications.

ASUS TX97-N User’s Manual 7
I. INTRODUCTION
I. INTRODUCTION
(Manual / Checklist)
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
(1) IDE ribbon cable for master and slave drives
(1) Floppy ribbon cable for one 3.5inch floppy drive
(1) Support drivers and utilities
(1) Motherboard User’s Manual
(1) System housing User’s Manual
(1) NLX Form-factor system housing, riser card, and power supply
DIMM memory module
3.5inch Floppy Drive
Slim CD-ROM and cable
ASUS PCI-SC200 Fast-SCSI or PCI-SC860 Ultra-Fast SCSI card (optional)
ASUS PCI-L101 Wake-on-LAN 10/100 Ethernet Card (optional)

8ASUS TX97-N User’s Manual
Features of the ASUS TX97-N Motherboard
The ASUS TX97-N motherboard is carefully designed for the demanding PC user
who wants many features in a small package, namely:
•Mini NLX: Features ASUS’ custom designed mini-NLX form factor.
•Intel Chipset: Features Intel’s 430TX PCIset.
•OnboardVGA: HasATI 3D Rage VGAonboard with 1MB upgradable to 2MB.
•OnboardAudio: Has Yamaha 16-bit audio onboard.
•LCD Support: Supports a LCD panel as an alternative to a bulky monitor.
•Slim CD-ROM: Supports a notebook-sized slim CD-ROM drive.
•Wake on LAN: Supports wake on LAN activity with special network cards.
•VersatileProcessorSupport: IntelPentium
®
75–233MHz(P55C-MMX
™
,P54C/
P54CS), IBM
®
/Cyrix
®
6x86-PR166+ (Rev 2.7 or later), IBM
®
/Cyrix
®
6x86MX
™
(PR166 & faster),AMD-K5
™
(PR75–PR133), AMD-K6
™
(PR166 & faster).
•Versatile Memory Support: Is equipped with two DIMM sockets to support
8-128MB 168-pin 3.3Volt SDRAM/EDO memory modules up to 256MB.
•ISA&PCI ExpansionSlots:Provides one 16-bit ISA slot & two 32-bit PCI slots
•SuperMulti-I/O:Provides an onboard I/O processor for two high-speed UART-
compatible serial ports and one parallel port with EPP and ECP capabilities.
•Level 2 Cache: Comes with onboard 512K Pipelined Burst SRAM.
•Onboard IrDA: Has an infrared port on the riser card for wireless interface.
• 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: Has onboard Ultra DMA/33 Bus Master
IDE controller with two connectors (one for CD-ROM only). Supports two IDE
devices up to 8.4GB using one channel. Supports BusMaster UltraDMA/33IDE,
PIO Modes 3 & 4, and Bus Master IDE DMA Mode 2. Includes integrated key-
board controller. Supports two of either 5.25-inch (360KB, 1.2KB) or 3.5-inch
disk drives (720KB, 1.44MB, 2.88MB). Supports Japanese “Floppy 3 mode”
(3.5-inch 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 bootup.
•TV Out: Supports optional onboard TV out funtion using ImpacTV chipset.
•Symbios SCSI BIOS: Supports optional ASUS SCSI controller cards through
onboard firmware.
•Performance: Provides 528MB/s data transfer rate using SDRAM, 33MB/s IDE
transfer rate using Bus Master UltraDMA/33 IDE, concurrent PCI allows multiple
PCI transfers
•Compliancy:IsACPI ready for advanced power management features and PC’97
for greater support.
•Easy Installation: Incorporates BIOS that supports autodetection of hard disk
drives, PS/2 mouse, and Plug and Play devices to make setup of hard disk drives,
expansion cards, and other devices virtually automatic.
•Riser Card: Provides NLX power, primary IDE, floppy drive, LAN wake up
connector, 2 PCI slots, 1 ISA slot, 2 USB ports, and IrDA.
II. FEATURES
(Features)
II. FEATURES

ASUS TX97-N User’s Manual 9
Parts of the ASUS TX97-N Motherboard
II. FEATURES
II. FEATURES
(Motherboard Parts)
2 USB Ports
IrDAPort Primary IDE
Connector
NLX Power
Connector
Riser Card Back
2 PCI Slots
1ISA Slot Floppy Drive
Connector
Riser Card Front
NLX Slot
ATI 3D Rage
Chipset
Multi-I/O
T: PS/2 Mouse
B: PS/2 Keyboard
T: Parallel Conn.
B: Serial Conn. COM 2
512KB Pipelined
Burst L2 Cache
Programmable
Flash ROM
Intel 430TX
PCIset
Intel PIIX4
PCIset
2 DIMM
Sockets
Intel CPU
Compatible
ZIF Socket 7
VGAMemory
Upgrade Sockets
LCD Panel
Connector
COM 1 VGA Connector Joystick/MIDI Connector
TVOut RCA
Conn.(optional)
TV Out S-Video
Conn.(optional)

10 ASUS TX97-N User’s Manual
III. INSTALLATION
ASUS TX97-N Motherboard Layout
CMOS Power
CR2032
3 Volt Cell
DIMM Socket 2 (64-bit, 168-pin module)
DIMM Socket 1 (64-bit, 168-pin module)
R
Flash EEPROM
(Programable BIOS)
Multi
I/O Chip
PS/2
MOUSE (TOP PORT)
KEYBOARD (BOTTOM)
Intel
430TX
PCIset
ATI 3D
Rage
VGA
512KB onboard
VGA Memory
Intel
PIIX4
PCIset
FS2 FS1 FS0
BUS Freq.
ATI Multimedia Connector
512KB Pipelined
Burst L2 Cache
32 10Row
512KB VGA Memory Socket
512KB VGA Memory Socket
VID0 VID1 VID2
CPU Voltage
BF2 BF1 BF0
Freq. Ratio
CPU ZIF Socket 7
Parallel Port
COM 1 COM 2
CDROM Connector
SVHS VGA Joystick/MIDI
RCA
TV Out TV Out
CPU_FAN
LCD Monitor Connector
RTCLR
Audio Conn.
(TV Out is optional)
512KB onboard
VGA Memory
(Motherboard Layout)
III. INSTALLATION
Floppy Drive Conn.
PCI Slot 2
PCI Slot 1
ISA Slot 1
Panel Conn.
NLX Ext. Riser Slot Riser Slot Riser Slot
LAN LED Wake on LAN
MIC Con.
Riser Card Front
Primary IDE
NLX Power
USB1&2
Infrared
Riser Card Back

ASUS TX97-N User’s Manual 11
III. INSTALLATION
Jumpers
1) RTCLR p. 13 Real Time Clock RAM (Operation/Clear Data)
2) BF0, BF1, BF2 p. 14 CPU:BUS Frequency Ratio
3) FS0, FS1, FS2 p. 14 CPU External Clock (BUS) Frequency Selection
4) VID0, 1, 2 p. 16 CPU Voltage Regulator Output Selection
Expansion Slots
1) DIMM Sockets p. 17 168-Pin DIMM Memory Expansion Sockets
2) CPU ZIF Socket 7 p. 19 Central Processing Unit (CPU) Socket
3) SLOT 1 p. 20 16-bit ISA Bus Expansion Slots
4) PCI 1, 2 p. 20 32-bit PCI Bus Expansion Slots
Connectors
1) PS2KEYBOARD p. 22 PS/2 Keyboard Connector (6-pin Female)
2) PS2MOUSE p. 22 PS/2 Mouse Connector (6-pin Female)
3) GAME_PORT p. 22 Joystick or MIDI Connector (15-pin Female)
4) PRINTER p. 23 Parallel (Printer) Port Connector (25-pin Female)
5) COM1, COM2 p. 23 Serial Port COM1 and COM2 (Two 9-pin Male)
6) VGA p. 23 VGA Compatible Connector (15-pin Female)
7) TV Out (optional) p. 23 Television Connector (RCA & 4-pin Female S-Video)
8) USB p. 24 Universal Serial BUS Ports 1 & 2 (Two 4-pin Female)
9) IR p. 24 Infrared Module
10) POWER p. 24 NLX Motherboard Power Connector (20-pin Block)
11) IDE1 p. 25 Primary IDE Connector (40-pin Block)
12) FLOPPY p. 25 Floppy Drive Connector (34-pin Block)
13. LAN_LED, WOL_ p. 25 LAN Activity Connectors (2-pin & 3-pin)
14) PAN_CON p. 26 Front Panel Display LEDs and Switches (16-1 pin)
15) MIC_CON p. 26 Front Panel Microphone Jack Connector (2 pin)
16) AMC p. 28 ATI Multimedia Connector (40-3 pin Block)
17) AUDIO p. 28 Back Panel Audio Connectors (10-1 pin Block)
18) CPU_FAN p. 28 CPU Fan Power (3-pin Block)
19) VGA Memory p. 29 Onboard VGAMemory Expansion Sockets (40 pins)
20) CDROM p. 29 CD-ROM Drive Connector (50-1 pins)
(Map of Board)
III. INSTALLATION

12 ASUS TX97-N User’s Manual
III. INSTALLATION
(Jumpers)
III. INSTALLATION
Installation Steps
Before using your computer, you must complete the following steps:
1. Set Jumpers on the Motherboard
2. Install System Memory
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
connection, connect pins 1&2, and connect pins 2&3 respectively. A “1” is written
besides pin 1 on jumpers with three pins. The jumpers will also be shown graphi-
cally 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. Set-
tings 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, baseboardsand components, suchas 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.
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.

ASUS TX97-N User’s Manual 13
III. INSTALLATION
III. INSTALLATION
(Jumpers)
1. Real Time Clock (RTC) RAM (RTCLR)
The CMOS RAM is powered by the onboard button cell battery. To clear the
RTC data: (1) Turn off your computer and remove theAC power , (2) Move this
jumper to “Clear Data,” (3) Move the jumper back to “Operation,” (4) Turn on
your computer, (5) Hold down <Delete> during bootup and enter BIOS setup to
re-enter user preferences.
Battery Test Jumper (RTCLR)
You can test the battery’s current by removing this jumper and attaching a cur-
rent meter to the “Operation” pins.
WARNING! You must unplug the power cord to your power supply to en-
sure that there is no power to your motherboard. The CMOS RAM con-
taining BIOS setup information may be cleared by this action. You should
enter BIOS to “Load Setup Defaults” and re-enter any user information
after removing and reapplying this jumper.
RTC RAM RTCLR
Operation [2-3] (Default)
Clear Data [1-2] (momentarily)
Jumper Settings
Real Time Clock (RTC) RAM
Operation (Default)
RTCLR
Clear Data
RTCLR
Battery Test
R
3
2
1
3
2
1

14 ASUS TX97-N User’s Manual
III. INSTALLATION
2. 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.
3. 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
timestheBUSRatioequalstheCPU’sInternalfrequency(the advertisedCPUspeed).
WARNING! Frequencies above 66MHz exceed the specifications for the
onboard Intel Chipset and are not guaranteed to be stable.
Match the table’s Ratio column
to these CPU types:
R
CPU : BUS Frequency Ratio
CPU A
CPU B
CPU C
CPU D
CPU E
----
----
----
----
4.0X(4/1)
3
2
1
BF1
BF0
BF2
3
2
1
BF1
BF0
BF2
3.0x(3/1)
3.0x(3/1)
----
----
3.0x(3/1)
3
2
1
BF1
BF0
BF2
2.5x(5/2)
2.5x(5/2)
1.0x(1/1)
2.0x(2/1)
2.5x(5/2)
3
2
1
BF1
BF0
BF2
2.0x(2/1)
2.0x(2/1)
2.0x(2/1)
2.0x(2/1)
2.0x(2/1)
----
----
----
----
(4.5X)(9/2)
3
2
1
BF1
BF0
BF2
2
3
1
BF1
BF0
BF2
1.5x(3/2)
3.5x(7/2)
3.0x(3/1)
3.0x(3/1)
3.5x(7/2)
CPU External Clock (BUS) Frequency Selection
50MHz
FS1
3
2
1
FS0 FS2
60MHz
FS1
FS0
FS2
3
2
166MHz
FS1
FS0
FS2
3
2
168MHz
FS1
FS0
FS2
3
2
175MHz
FS1
FS0
FS2
3
2
1
(Jumpers)
III. INSTALLATION

ASUS TX97-N User’s Manual 15
III. INSTALLATION
*NOTE: The only IBM/Cyrix 6x86(L) (or M1) that is sup-
ported on this motherboard is rev 2.7 or later. Look on the un-
derside of the CPU for the serial number. The number should
read G8DC6620A or later.
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. FS2 FS1 FS0 BF2 BF1 BF0
Intel Pentium P54C 166MHz A-2.5x 66MHz [1-2] [1-2] [1-2] [1-2] [2-3] [2-3]
Intel Pentium P54C 150MHz A-2.5x 60MHz [1-2] [1-2] [2-3] [1-2] [2-3] [2-3]
Intel Pentium P54C 133MHz A-2.0x 66MHz [1-2] [1-2] [1-2] [1-2] [1-2] [2-3]
Intel Pentium P54C 120MHz A-2.0x 60MHz [1-2] [1-2] [2-3] [1-2] [1-2] [2-3]
Intel Pentium P54C 100MHz A-1.5x 66MHz [1-2] [1-2] [1-2] [1-2] [1-2] [1-2]
Intel Pentium P54C 90MHz A-1.5x 60MHz [1-2] [1-2] [2-3] [1-2] [1-2] [1-2]
Intel Pentium P54C 75MHz A-1.5x 50MHz [2-3] [2-3] [2-3] [1-2] [1-2] [1-2]
AMD-K5-PR133 100MHz A-1.5x 66MHz [1-2] [1-2] [1-2] [1-2] [1-2] [1-2]
AMD-K5-PR120 90MHz A-1.5x 60MHz [1-2] [1-2] [2-3] [1-2] [1-2] [1-2]
AMD-K5-PR100 100MHz A-1.5x 66MHz [1-2] [1-2] [1-2] [1-2] [1-2] [1-2]
AMD-K5-PR90 90MHz A-1.5x 60MHz [1-2] [1-2] [2-3] [1-2] [1-2] [1-2]
AMD-K5-PR75 75MHz A-1.5x 50MHz [2-3] [2-3] [2-3] [1-2] [1-2] [1-2]
Intel Pentium P55C 233MHz B-3.5x 66MHz [1-2] [1-2] [1-2] [1-2] [1-2] [1-2]
Intel Pentium P55C 200MHz B-3.0x 66MHz [1-2] [1-2] [1-2] [1-2] [2-3] [1-2]
Intel Pentium P55C 166MHz B-2.5x 66MHz [1-2] [1-2] [1-2] [1-2] [2-3] [2-3]
IBM/Cyrix 6x86MX-PR233 200MHz B-3.0x 66MHz [1-2] [1-2] [1-2] [1-2] [2-3] [1-2]
IBM/Cyrix 6x86MX-PR200 166MHz B-2.5x 66MHz [1-2] [1-2] [1-2] [1-2] [2-3] [2-3]
IBM/Cyrix 6x86MX-PR166 150MHz B-2.5x 60MHz [1-2] [1-2] [2-3] [1-2] [2-3] [2-3]
*IBM/Cyrix 6x86-PR166+ 133MHz C-2.0x 66MHz [1-2] [1-2] [1-2] [1-2] [1-2] [2-3]
*IBM/Cyrix 6x86L-PR166+ 133MHz D-2.0x 66MHz [1-2] [1-2] [1-2] [1-2] [1-2] [2-3]
AMD-K6-PR233 233MHz E-3.5x 66MHz [1-2] [1-2] [1-2] [1-2] [1-2] [1-2]
AMD-K6-PR200 200MHz E-3.0x 66MHz [1-2] [1-2] [1-2] [1-2] [2-3] [1-2]
AMD-K6-PR166 166MHz E-2.5x 66MHz [1-2] [1-2] [1-2] [1-2] [2-3] [2-3]
(Jumpers)
III. INSTALLATION

16 ASUS TX97-N User’s Manual
III. INSTALLATION
(Jumpers)
III. INSTALLATION
5. Voltage Regulator Output Selection (VID0, 1, 2)
These jumpers set the voltage supplied to the CPU.
Intel Pentium (P54C)
(75MHz-200MHz)
Pentium MMX (P55C)
(150MHz-233MHz) 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 appro-
priate 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] [1-2] [2-3]
AMD K5 3.5V(VRE) ---- [1-2] [1-2] [2-3]
IBM/Cyrix 6x86 3.5V(VRE) ---- [1-2] [1-2] [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]
Intel P55C-MMX ---- 2.8V(Dual) [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]
AMD (.25micron) K6-233,266,300 ---- 2.1V(Dual) [1-2] [2-3] [2-3]
Note: Auto-voltage detection regulators allow some
jumper settings to be the same for two voltages.
Voltage Regulator Output Selection
R
VID1
VID2
VID0
3
2
1
2.1/2.9 Volts
3
2
1
3.5 Volts
VID1
VID2
VID0
2.8/3.4 Volts
VID1
VID2
VID0
3.2 Volts
3
2
1
VID1
VID2
VID0
3
2
1

ASUS TX97-N User’s Manual 17
III. INSTALLATION
(System Memory)
III. INSTALLATION
2. System Memory (DIMM)
Only Dual Inline Memory Modules (DIMM’s) can be used with this motherboard.
Twosocketsareavailablefor3.3Volt(power level) UnbufferedSynchronousDRAMs
(SDRAM) or EDO DRAM of either 8, 16, 32, 64, or 128MB to form a memory size
between 8MB to 512MB. One side (with memory chips) of the DIMM module
takes up one Row on the motherboard.
To utilize the chipset’s Error Checking and Correction (ECC) feature, you must use
a DIMM module with 9 chips per side (standard 8 chips/side + 1 parity chip) and
make the proper settings in the BIOS Chipset Features Setup.
IMPORTANT: Memory speed setup is required through “Auto Configuration” in
BIOS Chipset Features Setup.
Parity EDO DIMM (9 chips)
Non-Parity SDRAM DIMM (8 chips)
General DIMM Notes: (not true for all memory modules)
• Four possible memory chips are supported: EDO or SDRAM with and without parity.
• SDRAM chips are generally thinner with higher pin density than EDO chips.
• BIOS shows EDO or SDRAM memory on bootup screen.
• 8 chip/side modules do not support parity, only 9 chip/side modules support parity.
• Single sided modules are usually 16 or 64 MB, double sided are usually 8, 32, or 128MB.
Install memory in any combination as follows:
DIMM Location 168-pin DIMM Memory Modules Total Memory
Socket 0 (Rows 0&1) SDRAM/EDO 8, 16, 32, 64, 128MB x1
Socket 1 (Rows 2&3) SDRAM/EDO 8, 16, 32, 64, 128MB x1
Total System Memory (Max 256MB) =
ASUS DIMM Module Examples:

18 ASUS TX97-N User’s Manual
III. INSTALLATION
(System Memory)
III. INSTALLATION
DIMM Memory Installation Procedures:
Insert the module(s) as shown. Because the number of pins are different on either
side of the breaks, the module will only fit in the orientation as shown. DRAM
SIMM modules have the same pin contact on both sides. SDRAM DIMM modules
have different pint contact on each side and therefore have a higher pin density.
168 Pin DIMM Memory Sockets
88 Pins
20 Pins 60 Pins
R
Lock
The Dual Inline Memory Module (DIMM) memory modules must be 3.3Volt Un-
buffered Synchronous DRAM (SDRAM) or Extended Data Output (EDO) . You
can identify the type of DIMM module by the illustration below:
168-Pin DIMM Notch Key Definitions (3.3V)
DRAM Key Position Voltage Key Position
Unbuffered
RFU
Buffered Reserved
3.3V
5.0V
The notch on the DIMM module will shift between left, center, or right to identify
the type and also to prevent the wrong type to be inserted into the DIMM slot on the
motherboard. You must ask your retailer for the specifications before purchasing.
Four clock signals are supported on this motherboard.

ASUS TX97-N User’s Manual 19
III. INSTALLATION
III. INSTALLATION
(System Processor)
BlankLever Lock
1
ZIF Socket 7 with Pentium MMX Processor
Notch
1
R
3. Central Processing Unit (CPU)
The motherboard provides a 321-pin ZIF Socket 7 that is backwards compatible
with ZIF Socket 5 processors. The CPU that came with the motherboard should
have a fan attached to it to prevent overheating. If this is not the case then purchase
a fan before you turn on your system.
WARNING! Without a fan circulating air on the CPU, the CPU can overheat
and cause damage to both the CPU and the motherboard.
To install a CPU, first turn off your system and remove its cover. Locate the ZIF
socket and open it by first pulling the lever sideways away from the socket then
upwards to a 90-degree right angle. Insert the CPU with the correct orientation as
shown. Use the notched corner of the CPU with the white dot as your guide. The
white dot should point towards the end the of the lever. Notice that there is a blank
area where one hole is missing from that corner of the square array of pin holes and
a “1” printed on the motherboard next to that corner. Because the CPU has a corner
pin for three of the four corners, the CPU will only fit in the one orientation as
shown. The picture is for reference only; you should have a CPU fan that will cover
the face of the CPU. With the added weight of the CPU fan, no force is required to
insert the CPU. Once completely inserted, hold down on the fan and close the
socket’s lever.
IMPORTANT: You must set jumpers for “CPU to BUS Frequency Ratio” and
jumpers for “BUS Frequency Selection” depending on the CPU that you install.

20 ASUS TX97-N User’s Manual
III. INSTALLATION
(Expansion Cards)
III. INSTALLATION
4. Expansion Cards
WARNING! Make sure that you unplug your power supply when adding or
removing expansion cards or other system components. Failure to do so may
cause severe damage to both your motherboard and expansion cards.
First read your expansion card documentation on any hardware and software set-
tings that may be required to setup your specific card.
Expansion Card Installation Procedure:
1. Read the documentation for your expansion card.
2. Set any necessary jumpers on your expansion card.
3. Remove your computer system’s cover.
4. Remove the bracket on the slot you intend to use. Keep the bracket for pos-
sible future use.
5. Carefully align the card’s connectors and press firmly.
6. Secure the card on the slot with the screw you removed in step 4.
7. Replace the computer system’s cover.
8. Setup the BIOS if necessary
(such as “IRQ xx Used By ISA: Yes” in PNPAND PCI SETUP)
9. Install the necessary software drivers for your expansion card.
Assigning IRQs for Expansion Cards
Some expansion cards need to use an IRQ to operate. Generally an IRQ must be
exclusively assigned to one use. In an standard design there are 16 IRQs available
but most of them are already in use by parts of the system which leaves 6 free for
expansion cards.
Both ISA and PCI expansion cards may need to use IRQs. System IRQs are avail-
able to cards installed in the ISA expansion bus first, and any remaining IRQs are
then used by PCI cards. Currently, there are two types of ISA cards.