ASUS TXP4 User Manual

R

TXP4

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 T O THE IMPLIED
WARRANTIES OR CONDITIONS OF MERCHANT ABILITY 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 MA Y APPEAR IN THIS MANUAL, INCLUD­ING THE PRODUCTS AND SOFTWARE DESCRIBED IN IT.

Copyright © 1998 ASUSTeK COMPUTER INC. All Rights Reserved.

Product Name: ASUS TXP4
Manual Revision: 2.00
Release Date: February 1998

2 ASUS TXP4 User’s Manual

ASUS CONTACT INFORMATION

ASUSTeK COMPUTER INC.

Marketing

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

Technical Support

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

ASUS COMPUTER INTERNATIONAL

Marketing

Address: 6737 Mowry Ave, Mowry Business Center, Building 2,

Newark, CA 94560, USA
Fax: [phone]
Email: [e-mail]

Technical Support

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

ASUS COMPUTER GmbH

Marketing

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

Technical Support

Hotline: [phone]
BBS: 49-2102-448690
Email: [e-mail]
WWW: www.asuscom.de
FTP: ftp.asuscom.de/pub/ASUSCOM

ASUS TXP4 User’s Manual 3

CONTENTS

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

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

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

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

Features of the ASUS TXP4 Motherboard ...................................... 8

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

Parts of the ASUS TXP4 Motherboard............................................ 11

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

ASUS TXP4 Motherboard Layout .................................................. 12

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

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

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

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

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

SIMM Memory Installation.................................................. 20

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

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

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

.............................................................................................. 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

4 ASUS TXP4 User’s Manual

CONTENTS

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

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

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

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 TXP4 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 TXP4 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

• 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 TXP4 User’s Manual 7

II. FEATURES

(Features)

II. FEATURES

Features of the ASUS TXP4 Motherboard

The ASUS TXP4 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).

• Versatile Memor y Support: Is equipped with two DIMM sockets to support

8-256MB 168-pin 3.3Volt SDRAM/EDO memory modules up to 256MB. Is
also equipped with four SIMM sockets to support 4-64MB 72-pin Fast Page
Mode (FPM) or Extended Data Out (EDO) memory modules up to 256MB.
SIMMs and DIMMs cannot be used at the same time.

• 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 su p-

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

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

®

75–233MHz (P55C-MMX™,

™

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

PCI slots.

• 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 TXP4 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.

ASUS TXP4 User’s Manual 9

II. FEATURES

(This page was intentionally left blank)

10 ASUS TXP4 User’s Manual

II. FEATURES

Parts of the ASUS TXP4 Motherboard

Programmable
Flash ROM

Super Multi-I/O
3 ISA Slots

4 PCI Slots
IDE Connectors

AT Power
Connector

PS/2 Mouse, USB, IrDA

Serial, Parallel, Floppy

II. FEATURES

(Motherboard Parts)

ATX Power

4 SIMM Sockets

2 DIMM Sockets
Intel’s 430TX

PCIset

CPU ZIF
Socket 7

“Cool” Switching Voltage Regulators

512KB Pipelined
Burst L2 Cache

ASUS TXP4 User’s Manual 11

III. INSTALLATION

ASUS TXP4 Motherboard Layout

Boot Block Write

ISA Slot 3

(Motherboard Layout)

III. INSTALLATION

CR2032 3V
Lithium Cell

BIOS Power

IDE LED

Infrared

Panel Connectors

Switching Voltage
Regulators

ISA Slot 2

CPU Voltage

R

ISA Slot 1

ASUS

ASIC

Freq. Ratio

Multi-I/O

PCI Slot 4

RTC Clear

BF1

BF0

BF2

VID1

VID0

VID2

Super

Flash BIOS

PCI Slot 3

Wake on LAN

Intel
PIIX4
PCIset

CPU ZIF Socket 7

PCI Slot 2

Serial Ports

PS/2 Mouse,
USB, IrDA

Power Fan

PCI Slot 1

Primary IDE

FS1

FS0

FS2

Clock Freq

COM 1
COM 2
Parallel (Printer) Port

P9

AT Power Input

P8

ATX Power Input

Secondary IDE

01

Row

Key­board

Floppy Drives

SIMM Socket 2 (32-bit, 72-pin module)

SIMM Socket 1 (32-bit, 72-pin module)

SIMM Socket 3 (32-bit, 72-pin module)

01 23 23

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

SIMM Socket 4 (32-bit, 72-pin module)

Row

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

10

32

Intel
430TX
PCIset

512KB PB

L2 Cache

Chassis
Fan

CPU Fan

12 ASUS TXP4 User’s Manual

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

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

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

Expansion Slots

1) SIMM Sockets p. 19 72-Pin SIMM Memory Expansion Sockets

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

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

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

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

Connectors

*

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

7) IDELED p. 28 IDE LED Activity Light

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

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

10) PS2MOUSE/USB/IR p . 31 PS/2 Mouse/USB/IR Combo-Connector (18-1pin Block)
1 1) IR p. 31 Second Infrared Port Module Connector (5-pin Block)

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

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

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

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

16)

PWR.LED (

17)

KEYLOCK (

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

19) W0L_CON 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 TXP4 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.

Pin 1

or on the left

Pin 1

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 o r
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 TXP4 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]

R

Disabled/Protect
(Default)

TXP4 Boot Block Programming

BBLKW

BBLKW

Enabled

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 using a small
metalic object, (3) Turn on your computer , (4) Hold down <Delete> during bootup
and enter BIOS setup to re-enter user preferences.

RTC RAM CLRTC

Clear Data [short solder points momentarily]

(Jumpers)

III. INSTALLATION

R

TXP4 RTC RAM (Clear Data)

ASUS TXP4 User’s Manual 15

CLRTC

Short solder points
to Clear Data

III. INSTALLATION

(Jumpers)

III. INSTALLATION

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
times the BUS Ratio equals the CPU's Internal frequency (the advertised CPU speed).

4. 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. The following
table is for general reference purposes only . Always refer to the instructions
included with your CPU when possible.

FS2

FS1

R

FS0

1
2
3

50MHz

CPU External Clock (BUS) Frequency Selection

BF0

BF1

1
2
3

BF2

FS1

FS0

55MHz

BF1

BF0

FS2

BF2

FS0

1
2
3

60MHz

BF0

FS1

BF1

FS2

BF2

FS0

1
2
3

66MHz

BF0

FS1

BF1

FS2

BF2

FS0

1
2
3

75MHz

BF0

FS1

BF1

FS2

BF2

FS0

1
2
3

83MHz

BF0

FS1

BF1

FS2

BF2

TXP4 CPU Settings

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

CPU A
CPU B
CPU C
CPU D
CPU E

1
2
3

1.5x(3/2)

3.5x(7/2)

3.0x(3/1)

3.0x(3/1)

3.5x(7/2)

1
2
3

2.0x(2/1)

2.0x(2/1)

2.0x(2/1)

2.0x(2/1)

2.0x(2/1)

1
2
3

2.5x(5/2)

2.5x(5/2)

1.0x(1/1)

2.0x(2/1)

2.5x(5/2)

1
2
3

3.0x(3/1)

3.0x(3/1)

3.0x(3/1)

CPU : BUS Frequency Ratio

----

----

1
2
3

----

----

----

----

4.0X(4/1)

1
2
3

----

----

----

----

(4.5X)(9/2)

16 ASUS TXP4 User’s Manual

III. INSTALLATION

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 BF0 BF1 BF2

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

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

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

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

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

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

(Jumpers)

III. INSTALLATION

ASUS TXP4 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.

5. 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

R

VID2

VID0

VID1

VID2

VID0

VID1

VID2

VID0

VID1

VID2

VID1

VID2

VID0

VID1

VID2

1
2
3

2.0Volts

1
2
3

2.5Volts

1
2
3

3.0Volts

TXP4 CPU Vcore Voltage Selection

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 TXP4 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 (SIMM & DIMM)

This motherboard supports four 72-pin, 32-bit SIMMs (Single Inline Memory Mod­ules) of 4, 8, 16, 32, or 64MB to form a memory size between 8MB to 256MB. The
SIMMs can be either 60ns or 70ns Fast Page Mode (FPM) (Asymmetric or Sym­metric), or Enhanced Data Out (EDO) (BEDO & Parity are not supported). SIMMs
must be installed in pairs so that each Row (see motherboard layout for row loca­tions) contains 64-bits of the same size and type of memory chips. One side (with
memory chips) of the SIMM module takes up half a row on the motherboard.

Dual Inline Memory Modules (DIMMs) can be used when the SIMM sockets are
not used. Two sockets are available for 3.3Volt (power level) Unbuffered Synchro-
nous DRAMs (SDRAM) or EDO DRAM of either 8, 16, 32, 64, 128, 256MB to
form a memory size between 8MB to 256MB. One side (with memory chips) of the
DIMM module takes up one row on the motherboard.

IMPORTANT: Memory speed setup is required through “Auto Configuration” in
BIOS Chipset Setup of the BIOS SOFTWARE. If both 60ns and 70ns memory are
used, set “Auto Configuration” to 70ns. Do not use memory modules with more than
18 chips per module. Modules with more than 18 chips exceed the design specifica­tions of the memory subsystem and will be unstable.

Memory Socket SIMM Memory Module Total Memory
SIMM Sockets 1&2 4MB, 8MB, 16MB, 32MB, 64MB x2

(Rows 0 & 1) 72-pin FPM or EDO SIMM

(DIMM Sockets must be empty)

SIMM Sockets 3&4 4MB, 8MB, 16MB, 32MB, 64MB x2
(Rows 2 & 3) 72-pin FPM or EDO SIMM

(DIMM Sockets must be empty)
Total System Memory (Max 256MB) =

WARNING! Do not install both SIMMs and DIMMs at the same time or else you

will burn your memory . Mixing SIMMs and DIMMs require 5.0Volt (signal level)
tolerant memory chips which are currently unavailable.

Memory Socket DIMM Memory Module Total Memory
DIMM Socket 1 8, 16, 32, 64, 128, 256MB x1

(Rows 0 & 1) 168-pin SDRAM or EDO DIMM

(SIMM Sockets must be empty)

DIMM Socket 2 8, 16, 32, 64, 128, 256MB x1
(Rows 2 & 3) 168-pin SDRAM or EDO DIMM

(SIMM Sockets must be empty)

(System Memory)

III. INSTALLATION

Total System Memory (Max 256MB) =

ASUS TXP4 User’s Manual 19

III. INSTALLATION

SIMM Memory Installation

1. The SIMM memory modules will fit in only one orientation as shown because
the plastic safety tab on one end of the SIMM sockets requires the notched end
of the SIMM memory modules.

III. INSTALLATION

(System Memory)

2. Press the memory module firmly into place starting from a 45-degree angle,
making sure that all the contacts are aligned with the socket.

R

TXP4 72 Pin SIMM Sockets

1234

Notched End

3. With your fingertips, rock the memory module into a vertical position so that it
clicks into place. The plastic guides should go through the two mounting holes
and the support clips should snap.

Clip

Plastic Safety Tab (This Side Only)

72 Pin DRAM in SIMM Socket

Mounting Hole

To release the memory module, push both support clips outward and rock the
module out of the support clips.

20 ASUS TXP4 User’s Manual