Asus MEZ User manual

R
MEZ
Socket 370 AGP Motherboard
USER’S MANUAL

2ASUS MEZ User’s Manual
USER'S NOTICE
Product Name: ASUS MEZ
Manual Revision: 1.01 E345
Release Date: January 1999
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.
• 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, 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 © 1999 ASUSTeK COMPUTER INC. All Rights Reserved.

ASUS MEZ User’s Manual 3
ASUS CONTACT INFORMATION
ASUSTeK COMPUTER INC. (Asia-Pacific)
Marketing
Address: 150 Li-Te Road, Peitou, Taipei, Taiwan 112
Telephone: [phone]
Fax: [phone]
Email: [email protected]
Technical Support
Tel (English): [phone] ext. 706
Tel (Chinese): [phone] ext. 701
Fax: [phone]
Email: [email protected]
Newsgroup: news2.asus.com.tw
WWW: www.asus.com.tw
FTP: ftp.asus.com.tw/pub/ASUS
ASUS COMPUTER INTERNATIONAL (America)
Marketing
Address: 6737 Mowry Avenue, Mowry Business Center, Building 2
Newark, CA 94560, USA
Fax: [phone]
Email: [email protected]
Technical Support
Fax: [phone]
BBS: [phone]
Email: [email protected]
WWW: www.asus.com
FTP: ftp.asus.com.tw/pub/ASUS
ASUS COMPUTER GmbH (Europe)
Marketing
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

4ASUS MEZ User’s Manual
CONTENTS
I. INTRODUCTION.............................................................................. 7
How this manual is organized............................................................. 7
Item Checklist ..................................................................................... 7
II. FEATURES ....................................................................................... 8
The ASUS MEZ Motherboard ............................................................ 8
Introduction to ASUS Smart Series Motherboards ................. 9
Parts of the ASUS MEZ Motherboard .............................................. 11
III. HARDWARE SETUP.................................................................... 12
ASUS MEZ Motherboard Layout..................................................... 12
Hardware Setup Steps ....................................................................... 14
1. Motherboard Settings.................................................................... 14
DIP Switches (DIP) ............................................................... 15
2. System Memory (DIMM) ............................................................. 17
SPD Support .......................................................................... 17
DIMM Memory Installation .................................................. 18
3. Central Processing Unit (CPU).................................................... 19
4. Expansion Cards ........................................................................... 21
Expansion Card Installation Procedure ................................. 21
Assigning IRQs for Expansion Cards.................................... 21
Assigning DMA Channels for ISA Cards.............................. 22
ISA Cards and Hardware Monitor ......................................... 22
Accelerated Graphics Port (AGP) ......................................... 22
5. External Connectors..................................................................... 23
Power Connection Procedures .......................................................... 35
Flash Memory Writer Utility ............................................................ 36
IV. BIOS SETUP................................................................................... 36
Main Menu .................................................................................. 36
Managing and Updating Your Motherboard’s BIOS................... 38
6. BIOS Setup .................................................................................. 39
Load Defaults ........................................................................ 40
Standard CMOS Setup ................................................................ 40
Details of Standard CMOS Setup:......................................... 40
BIOS Features Setup ................................................................... 43
Details of BIOS Features Setup............................................. 43
Chipset Features Setup ................................................................ 46
Details of Chipset Features Setup.......................................... 46
Power Management Setup........................................................... 49
Details of Power Management Setup .................................... 49
PNP and PCI Setup ..................................................................... 52
Details of PNP and PCI Setup ............................................... 52

ASUS MEZ User’s Manual 5
CONTENTS
Load BIOS Defaults .................................................................... 54
Load Setup Defaults .................................................................... 54
Supervisor Password and User Password ................................... 55
IDE HDD Auto Detection ........................................................... 56
Save & Exit Setup ....................................................................... 57
Exit Without Saving .................................................................... 57
V. SOFTWARE SETUP ....................................................................... 59
VI. SOFTWARE REFERENCE.......................................................... 73
APPENDIX ........................................................................................... 97
ASUS CIDB Chassis Intrusion Sensor Module................................ 97
ASUS PCI-L101 Fast Ethernet Card ................................................ 99
Glossary .......................................................................................... 101

6ASUS MEZ User’s Manual
FCC & DOC COMPLIANCE
FederalCommunications 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 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 interfer-
ence 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! Be sure that there is sufficient air circulation across the processor’s
heatsink by regularly checking that your CPU fan is working. Without sufficient
circulation, the processor could overheat and damage both the processor and the
motherboard. You may install an auxiliary fan, if necessary.
CanadianDepartment 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.

ASUS MEZ User’s Manual 7
I. INTRODUCTION
I. INTRODUCTION
Sections/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. Hardware Setup Instructions on setting up the motherboard
IV. BIOS Setup Instructions on setting up the BIOS software
V. Software Setup Information on setting up the included support software
VI. Software Reference Reference material for the included support software
Item Checklist
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) Ribbon cable for (1) 5.25” and (2) 3.5” floppy disk drives
(1) Bag of spare jumper caps
(1) Support CD with drivers and utilities
(1) This Motherboard User’s Manual
ASUS IrDA-compliant infrared module (optional)
ASUS CIDB chassis intrusion sensor module (optional)
ASUS PCI-L101 Wake-On-LAN 10/100 fast ethernet card (optional)

8ASUS MEZ User’s Manual
II. FEATURES
Features
II. FEATURES
The ASUS MEZ Motherboard
TheASUS MEZ motherboard is carefully designed for the demanding PC user who
wants many intelligent features in a small package.
•Intel Processor Support: Supports Intel’s Celeron processor designed for the
Socket 370 and packaged in Plastic Pin Grid Array (PPGA).
•Intel AGPset: Features Intel’s 440ZX AGPset with I/O subsystems and front
side bus (FSB) platform, which boosts the traditional 66MHz internal bus to
100MHz.
•Enhanced ACPI & Anti-Boot Virus BIOS: Programmable BIOS (Flash
EEPROM),offering enhancedACPI forWindows 98 compatibility, built-in hard-
ware-based virus protection, and autodetection of most devices for virtually au-
tomatic setup.
•PC100 Memory Support: Equipped with three DIMM sockets to support Intel
PC100-compliant SDRAMs (8, 16, 32, 64, 128, or 256MB) up to 256MB.These
new SDRAMs are necessary to meet the critical enhanced 100MHz bus speed
requirement.
•AGP Slot: Supports an Accelerated Graphics Port card for high performance,
component level interconnect targeted at 3D graphical display applications sup-
porting a 1X or 2X mode bus.
•OnboardAudio (optional): Features an ESS Solo-1 32-bit PCI audio onboard.
Includes a complete online help to guide you through the audio software.
•PCI & ISA Expansion: Provides four 32-bit PCI expansion slots and three 16-
bit ISA expansion slots.
•PCHealthMonitoring (optional):Provides an easier way to examine and man-
age system status information such as CPU and system voltages, temperatures,
and fan status through the onboard hardware ASIC and the bundled LDCM by
Intel or PC Probe from ASUS.
•Wake-On-LAN Header: Supports Wake-On-LAN activity through an optional
ASUS PCI-L101 Fast Ethernet card (SeeAPPENDIX) or a similar ethernet card.
•SB-Link™: Features Creative’s SB-Link™, allowing SB16 compatibility, us-
ing Intel’s PC-PCI and serialized IRQ protocols, toAWE64D or compatible PCI
audio cards.
• Multi-I/O:Provides two high-speed UART compatible serial ports and one par-
allel port with EPP and ECP capabilities.
• Desktop ManagementInterface (DMI): Supports DMI through BIOS, which
allows hardware to communicate within a standard protocol creating a higher
level of compatibility. (Requires DMI-enabled components.)
•UltraDMA/33BM IDE:Comes with an onboard PCI Bus Master IDE controller
with two connectors that support four IDE devices in two channels, supports Ultra
DMA/33, PIO Modes 3 and 4 and Bus Master IDE DMA Mode 2, and supports
Enhanced IDE devices, such as Tape Backup, CD-ROM, and LS-120 drives.
•Easy Installation: Equipped with BIOS that supports autodetection of hard
drives, PS/2 mouse, and Plug and Play devices to make setup of hard drives,
expansion cards, and other devices virtually automatic.

ASUS MEZ User’s Manual 9
II. FEATURES
II. FEATURES
Smart Series
Introduction to ASUS Smart Series Motherboards
Performance
• ACPIReady:ACPI(Advanced Configuration and Power Interface) isalsoimple-
mented on all ASUS smart series motherboards. ACPI provides more Energy
Saving Features for 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, yet satisfy all the energy saving standards.
To fully utilize the benefits ofACPI, anACPI-supported OS such as the succes-
sor of Windows 95 must be used.
• Double the IDE Transfer Speed: IDE transfers using UltraDMA/33 Bus Mas-
ter IDE can handle rates up to 33MB/sec. The best of all is that this new technol-
ogy is compatible with existingATA-2 IDE specifications so there is no need to
upgrade current hard drives or cables.
•Concurrent PCI: Concurrent PCI allows multiple PCI transfers from PCI mas-
ter buses to memory to CPU.
• PC’98Compliant: BoththeBIOSand hardware levels of the motherboard meets
PC’98 compliancy. The new PC’98 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 Windows 95/98/NT.
• SDRAM Optimized Performance: ASUS smart series motherboards support
the new generation memory, Synchronous Dynamic Random Access Memory
(SDRAM), which increases the data transfer rate to 800MB/s max using PC100
SDRAM.
•IrDA: Supports an optional infrared port module for wireless interface.
•Quick Adjustments: Easy-to-access DIP switches make changing CPU and
onboard function settings a snap.

10 ASUS MEZ User’s Manual
II. FEATURES
Smart Series
II. FEATURES
Intelligence (some features require the optional Hardware/Thermal Monitor)
• Fan Status Monitoring and Alarm: To prevent system overheat and system
damage, the CPU, power supply, and system fans can be monitored for RPM
and failure. All the fans are set for its normal RPM range and alarm thresholds.
•Temperature Monitoring and Alert: To prevent system overheat and system
damage, there are heat sensors to monitor the CPU and system temperatures to
warn of damaging temperatures.
•Voltage Monitoring and Alert: System voltage levels are monitored to ensure
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.
• SystemResourcesAlert:Today’s operating systems such as Windows 95, Win-
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 moni-
tor will warn the user before the system resources are used up to prevent pos-
sible application crashes. Suggestions will give the user information on manag-
ing their limited resources more efficiently.
• 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
an important feature to implement silent PC systems.
• Dual Function Power Button: 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 modem): This allows a computer to be turned on
remotely through an internal or external modem. With this benefit on-hand, any
usercanaccessvitalinformationfromtheircomputerfrom anywhere in the world!
• Message LED (requires ACPI OS support): Chassis LEDs now act as infor-
mation providers. Through the way a particular LED illuminates, the user can
determine the stage the computer is in.A simple glimpse provides useful infor-
mation to the user.
• Keyboard Power Up: Keyboard Power Up can be enabled or disabled to allow
the computer to be powered on by pressing the space bar on the keyboard.
•Chassis Intrusion Detection: Supports chassis-intrusion monitoring through the
optional ASUS CIDB chassis intrusion sensor module (See APPENDIX) and
LDCM.

ASUS MEZ User’s Manual 11
Parts of the ASUS MEZ Motherboard
II. FEATURES
II. FEATURES
Motherboard Parts
T: USB1
B: USB2
T: PS/2 Mouse
B: PS/2 Keyboard
T:Parallel
B:Serial
Serial COM1
T: Joystick/Midi
B: Out/In/Mic
(optional)
4 PCI Slots
3 ISA Slots
Programmable
Flash EEPROM
Intel PIIX4E
PCIset
Multi-I/O &
Keyboard
Controller
3 DIMM Slots
Intel 440ZX
AGPset IDE
Connectors
Socket 370
Serial COM2
AGP Port
Wake-On-LAN
Header SB-Link™ Header Wake-On-Ring Header
Hardware Monitor
(optional)
ATX Power
Floppy
Connector
ESS Solo-1
3D PCI Audio
(optional)
DIP
Switches

12 ASUS MEZ User’s Manual
III. HARDWARE SETUP
ASUS MEZ Motherboard Layout
Motherboard Layout
III. H/W SETUP
COM1
PARALLEL PORT
COM2
USB
T: Port 1
B: Port 2
PS/2
T: Mouse
B: Keyboard
CPU_FAN
Multi-I/O
&
Keyboard
Controller
Intel
440ZX
AGPset
KBPWR
ASUS
ASIC
01
DIMM1 (64/72-bit, 168-pin module)
0 1
PWR_FAN
PRINTER
WOR
SBLINK
WOL_CON
CHASIS
CD2
MODEM
Socket 370
Thermal
Sensor
GAME_AUDIO
Mic
In
Line
Out
Line
In
CHA_FAN
CD1
AUX
SMB
PCI Slot 1
PCI Slot 2
PCI Slot 4
PCI Slot 3
Panel
IDE LED
Floppy
IDE2 IDE1
ISA Slot 1
ISA Slot 2
ATX Power Connector
2Mbit Flash EEPROM
(Programmable BIOS)
Hardware
Monitor
IR
JTPWR
CLRTC
Intel
PIIX4E
Chipset
01
DIMM2 (64/72-bit, 168-pin module)
2 3
01
DIMM3 (64/72-bit, 168-pin module)
4 5
CR2032 3V
Lithium Cell
CMOS Power
ISA Slot 3
Accelerated Graphics Port
DIP
Switches
Row
ESS
Solo-1
PCI
Audio
(Grayed items are optional at the time of purchase.)

ASUS MEZ User’s Manual 13
III. HARDWARE SETUP
Motherboard Settings
1) KBPWR p. 14 Keyboard Power Up (Enable/Disable)
2) DIP-Switch 5 p. 15 Onboard Audio Setting
3) DIP-Switch 6 p. 15 VIO Setting
4) DIP-Switch 7,8,9,10 p. 16 CPU Bus Frequency Selection
5) DIP-Switch 1,2,3,4 p. 16 CPU Core:Bus Frequency Multiple
Expansion Slots/Sockets
1) DIMM1, DIMM2, DIMM3 p. 17 168-Pin DIMM Memory Support
2) Socket 370 p. 19 Central Processing Unit (CPU) Socket
3) SLOT1, SLOT2, SLOT3 p.21 16-bit ISA Bus Expansion Slots
*
4) PCI1, PCI2, PCI3, PCI4 p.21 32-bit PCI Bus Expansion Slots
5) AGP p. 22 Accelerated Graphics Port
Connectors
1) PS2KBMS p. 23 PS/2 Mouse Connector (6-pin female)
2) PS2KBMS p. 23 PS/2 Keyboard Connector (6-pin female)
3) USB p. 24 Universal Serial BUS Ports 1 & 2 (Two 4-pin female)
4) PRINTER p. 24 Parallel Port Connector (25-pin female)
5) COM1, COM2 p. 24 SerialPortCOM1and COM2Connectors (9-pinmale)
6) GAME_AUDIO (optional) p. 25 Joystick/Midi Connector (15-pin female) (optional)
7) GAME_AUDIO (optional) p. 25 AudioPort Connectors(Three 1/8”female) (optional)
8) ATXPWR p. 25 ATX Power Supply Connector (20 pins)
9) IDE1, IDE2 p. 26 Primary/Secondary IDE Connectors (Two 40-1pins)
10) FLOPPY p. 26 Floppy Disk Drive Connector (34-1pins)
11) CHA_, CPU_, PWR_FAN p. 27 Chassis,CPU,PowerSupplyFanConnectors(Three3-pin)
12) WOL_CON p. 27 Wake-On-LAN Header (3 pins)
13) WOR p. 28 Wake-On-Ring Header (2 pins)
14) IR p. 28 IrDA-Compliant Infrared Module Connector (5 pins)
15) IDELED p. 29 IDE LEDActivity Light (2 pins)
16) SBLINK p. 29 SB-Link
TM
Connector (6-1 pins)
17) CHASIS p. 30 Chassis Intrusion Sensor Lead (4-1 pins)
18) SMB p. 30 SMBus Connector (5-1 pins)
19) AUX/CD1/CD2 (optional) p. 31 Stereo Audio In Connectors (Two 4-pin)
20) MODEM (optional) p. 31 Modem Card Voice In Connector (4 pins)
21) MSG.LED (PANEL) p. 32 System Message LED (2 pins)
22) SMI (PANEL) p. 32 SMI Switch Lead (2 pins)
23) PWR.SW (PANEL) p. 32 ATX Power & Soft-Off Switch Lead (2 pins)
24) RESET (PANEL) p. 33 Reset Switch Lead (2 pins)
25)
PWR.LED ( PANEL ) p. 33 System Power LED Lead (3-1 pins)
26)
KEYLOCK ( PANEL ) p. 33 Keyboard Lock Switch Lead (2 pins)
27) SPEAKER (PANEL) p. 33 System Warning Speaker Connector (4 pins)
28) JTPWR p. 33 Power Supply Thermal Sensor Connector (2 pins)
*
The onboard hardware monitor uses the address 290H-297H so legacy ISA cards
must not use this address; otherwise, conflicts will occur.
Layout Contents
III. H/W SETUP

14 ASUS MEZ User’s Manual
III. HARDWARE SETUP
Motherboard Settings
III. H/W SETUP
1. Keyboard Power Up (3-pin KBPWR)
This allows you to disable or enable the keyboard power up function. Set this
jumper to Enable if you wish to use your keyboard (by pressing the spacebar) to
power up your computer. This feature requires an ATX power supply that can
supply at least 300mAmp on the +5VSB lead. The default is set to Disable
because not all computers have the appropriate ATX power supply. Your com-
puter will not power on if you set this to Enable and if you do not have the right
ATX power supply.
MEZ Keyboard Power Up
Disable
(Default)
KBPWR
Enable
1
2
3
1
2
3
KBPWR
0 10 10 1
Hardware Setup Steps
Before using your computer, you must complete the following steps:
1. Check Motherboard Settings
2. Install Memory Modules
3. Install the Central Processing Unit (CPU)
4. Install Expansion Cards
5. Connect Ribbon Cables, Panel Wires, and Power Supply
6. Setup the BIOS Software
1. Motherboard Settings
WARNING!Computer motherboards, baseboards and components, such asSCSI
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 MEZ User’s Manual 15
III. HARDWARE SETUP
III. H/W SETUP
Motherboard Settings
DIP Switches (DIP)
Some of the motherboard’s onboard functions can be adjusted through the DIP
switches.The white block represents theswitch’s position.The example belowshows
all the switches in the OFF position.
<Frequency Selection
<Frequency Selection
<Frequency Selection
<Frequency Selection
<VIO Setting
<Onboard Audio Setting
<Frequency Multiple
<Frequency Multiple
<Frequency Multiple
<Frequency Multiple
MEZ DIP Switches
ON
12345678910
0 10 10 1
DIP
OFFON
2. Onboard Audio Setting (DIP-Switch 5)
The onboard audio can be turned ON or OFF using this switch.
MEZ Audio Setting
ON
12345678910
Disable
ON
12345678910
Enable
0 10 10 1
3. VIO Setting (DIP-Switch 6)
The onboard voltage regulator allows you to select the voltage supplied to the
DRAM, chipset, AGP, and the CPU’s I/O buffer. IMPORTANT! Setting this
function switch to ON (3.66Volt) may reduce system life. It is strongly recom-
mended that you leave this switch on its default setting of OFF (3.50Volt).
ON
12345678910
ON
12345678910
MEZ VIO Setting
3.50Volt 3.66Volt
0 10 10 1

16 ASUS MEZ User’s Manual
III. HARDWARE SETUP
Motherboard Settings
III. H/W SETUP
4. CPU External (BUS) Frequency Selection (DIP-Switches 7, 8, 9, 10)
These function switches tell the clock generator what frequency to send to the
CPU. Theseallow the selection of the CPU’sExternal frequency (or BUS Clock).
The BUS Clock times the BUS Ratio equals the CPU's Internal frequency (the
advertised CPU speed).
MEZ CPU BUS Frequency Selection
C
PU/AGP
P
CI BUS →
→133MHz
33.3MHz 133MHz 44.3MHz
115MHz
38.33MHz 120MHz 40MHz 124MHz 31MHz
ON
12345678910
ON
12345678910
ON
12345678910
ON
12345678910
ON
12345678910
ON
12345678910
ON
12345678910
140MHz
35MHz 150MHz 37.5MHz
112MHz
37.33MHz
ON
12345678910
C
PU/AGP
PCI BUS →
→103.0MHz
34.3MHz 105MHz 35MHz
75.0MHz
37.5MHz 83.30MHz 41.65MHz 100.3MHz 33.4MHz 110.00MHz 36.67MHz
66.8MHz
33.4MHz
ON
12345678910
ON
12345678910
ON
12345678910
ON
12345678910
ON
12345678910
ON
12345678910
ON
12345678910
5. CPU to BUS Frequency Multiple (DIP-Switches 1, 2 , 3, 4)
These function switches set the frequency multiple between the Internal fre-
quency of the CPU and the External frequency (called the BUS Clock) within
the CPU.
MEZ CPU : BUS Frequency Multiple
4.5x(9/2)4.0x(4/1)
3.5x(7/2)
2.5x(5/2)
2.0x(2/1) 3.0x(3/1) 5.0x(5/1)
8.0x(8/1)7.5x(15/2)
7.0x(7/1)
6.0x(6/1)
5.5x(11/2) 6.5x(13/2)
ON
12345678910
ON
12345678910
ON
12345678910
ON
12345678910
ON
12345678910
ON
12345678910
ON
12345678910
ON
12345678910
ON
12345678910
ON
12345678910
ON
12345678910
ON
12345678910
ON
12345678910
Set the DIP switchesby the Internal speed of your processor as follows:
(BUS Frequency Switches) (Frequency Multiple Switches)
Intel CPU Model Speed Mult Freq. 10 9 8 7 4 3 2 1
Celeron (PPGA) 466MHz 7.0x 66MHz [OFF] [OFF] [ON] [ON] [ON] [OFF] [ON] [OFF]
Celeron (PPGA) 433MHz 6.5x 66MHz [OFF] [OFF] [ON] [ON] [OFF] [ON] [ON] [OFF]
Celeron (PPGA) 400MHz 6.0x 66MHz [OFF] [OFF] [ON] [ON] [ON] [ON] [ON] [OFF]
Celeron (PPGA) 366MHz 5.5x 66MHz [OFF] [OFF] [ON] [ON] [OFF] [OFF] [OFF] [ON]
Celeron (PPGA) 333MHz 5.0x 66MHz [OFF] [OFF] [ON] [ON] [ON] [OFF] [OFF] [ON]
Celeron (PPGA) 300MHz 4.5x 66MHz [OFF] [OFF] [ON] [ON] [OFF] [ON] [OFF] [ON]

ASUS MEZ User’s Manual 17
III. HARDWARE SETUP
System Memory
III. H/W SETUP
SPD Support
This motherboard supports SPD DIMMs, and it is recommended that SPD DIMMs
be used.
General DIMM Notes
•Forthe systemCPU busto operateabove 100MHz, use only PC100-compli-
ant DIMMs.When this motherboard operates at 100MHz, most system will not
even boot if non-compliant modules are used because of the strict timing issues
involved under this speed. If your DIMMs are not PC100-compliant, set the
CPU bus frequency to 66MHz for system stability.
• Two possible memory chips are supported: SDRAM with and without ECC.
• SDRAM chips are generally thinner with higher pin density than EDO (Ex-
tended Data Output) chips.
• BIOS shows SDRAM memory on bootup screen.
• 8chips/sidemodulesdonot support ECC, only 9 chips/sidemodulessupportECC.
• Single-sided DIMMs come in 16, 32, 64,128MB; double-sided come in 32, 64,
128, 256MB.
2. System Memory (DIMM)
NOTE: No hardware or BIOS setup is required after adding or removing memory.
This motherboard uses only Dual Inline Memory Modules (DIMMs). Sockets are
available for 3.3Volt (power level) unbuffered Synchronous Dynamic Random Ac-
cess Memory (SDRAM) of either 8, 16, 32, 64, 128MB, or 256MB.
The Intel 440ZX AGPset does not support ECC function. ECC memory modules
may be used but the ECC function will not be available.
Memoryspeedsetup is recommended through SDRAM Configuration under “Chipset
Features Setup” in BIOS SETUP.
Install memory in the following combinations:
Location 168-pin DIMM SDRAM Total Memory
DIMM1 Single-sided x1
(Rows 0&1) Double-sided
DIMM2 Single-sided x1
(Rows 2&3) Double-sided (Socket 3 must be empty)
DIMM3 Single-sided (Socket 2 must be single-sided) x1
(Row 3) (Double-sided cannot be used here!)
Total System Memory (Max 256MB) =
IMPORTANT!Atotal of four rows of memory is supported on this motherboard.
One side (with memory chips) of the DIMM takes up one row. Because Socket 3
shares Row 3 with Socket 2, Socket 3 can only be used if Socket 2 does not use
Row 3.
WARNING! If Row 3 is used by both Socket 2 and 3, your system will not boot up!

18 ASUS MEZ User’s Manual
DIMM Memory Installation
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. DIMM
modules are longer and have different pin contact on each side and therefore have a
higher pin density. SIMM modules have the same pin contact on both sides.
MEZ 168-Pin DIMM Sockets
Lock
FRONT
20 Pins 60 Pins 88 Pins
0 10 10 1
TheDIMMsmustbe3.3VUnbufferedfor this motherboard.To determine the DIMM
type, check the notches on the DIMMs (see figure below).
168-Pin DIMM Notch Key Definitions (3.3V)
DRAM Key Position Voltage Key Position
Unbuffered
RFU
Buffered Reserved
3.3V
5.0V
The notches on the DIMM module will shift between left, center, or right to identify
the typeand alsoto prevent the wrongtype from being inserted intothe DIMM slot on
the motherboard.You must ask your retailer the correct DIMM type before purchas-
ing. This motherboard supports four clock signals.
III. HARDWARE SETUP
System Memory
III. H/W SETUP

ASUS MEZ User’s Manual 19
III. HARDWARE SETUP
CPU
III. H/W SETUP
3. Central Processing Unit (CPU)
The motherboard provides a ZIF Socket 370. The CPU that came with the mother-
board 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! Be sure that there is sufficient air circulation across the processor’s
heatsink by regularly checking that your CPU fan is working. Without sufficient
circulation, the processor could overheat and damage both the processor and the
motherboard. You may install an auxiliary fan, if necessary.
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. The notched corner should point towards the end the of the lever. Because
the CPU has a corner pin for two 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, close the socket’s lever
while holding down the CPU.
NOTE: Set the bus frequency and multiple for your Socket 370 processor.
MEZ Socket 370
Socket 370 CPU (Top) Socket 370 CPU (Bottom)
Notch
0 10 10 1

20 ASUS MEZ User’s Manual
III. HARDWARE SETUP
CPU
III. H/W SETUP
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