®
A7M266
266MHz FSB DDR RAM AGP Pro
Socket A Motherboard
USER’S MANUAL
ASUS CONTACT INFORMATION
ASUSTeK COMPUTER INC. (Asia-Pacific)
Marketing
Address:
Telephone:
Fax:
150 Li-Te Road, Peitou, Taipei, Taiwan 112
+886-2-2894-3447
+886-2-2894-3449
Email:
Technical Support
MB/Others (Tel): +886-2-2890-7121 (English)
Notebook (Tel):
+886-2-2890-7122 (English)
Desktop/Server (Tel):+886-2-2890-7123 (English)
Fax:
+886-2-2893-7775
www.asus.com.tw
Email:
WWW:
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:
Email:
+1-510-608-4555
Technical Support
Fax:
+1-510-608-4555
www.asus.com
ftp.asus.com/Pub/ASUS
Email:
WWW:
FTP:
ASUS COMPUTER GmbH (Europe)
Marketing
Address:
Fax:
Harkortstr. 25, 40880 Ratingen, BRD, Germany
+49-2102-442066
Email:
[email protected] (for marketing requests only)
Technical Support
Hotline:
Fax:
Support (Email):
MB/Others: +49-2102-9599-0 Notebook: +49-2102-9599-10
+49-2102-9599-11
www.asuscom.de/de/support (for online support)
WWW:
FTP:
www.asuscom.de
ftp.asuscom.de/pub/ASUSCOM
ASUS A7M266 User’s Manual
3
CONTENTS
1. INTRODUCTION
7
1.1 How This Manual Is Organized ................................................... 7
1.2 Item Checklist .............................................................................. 7
2. FEATURES
8
2.1 The ASUS A7M266 ..................................................................... 8
2.1.1 Specifications ..................................................................... 8
2.1.2 Specifications – Optional Components .............................. 9
2.1.3 Special Features................................................................ 10
2.1.4 Performance Features ....................................................... 10
2.1.5 Intelligence ....................................................................... 11
2.2 Motherboard Components.......................................................... 12
2.2.1 Component Locations....................................................... 13
3. HARDWARE SETUP
14
3.1 Motherboard Layout .................................................................. 14
3.2 Layout Contents ......................................................................... 15
3.3 Getting Started ........................................................................... 17
3.4 Motherboard Settings ................................................................. 18
3.5 System Memory (DDR DIMM)................................................. 25
3.5.1 General DIMM Notes....................................................... 26
3.5.2 Memory Installation ......................................................... 26
3.6 Central Processing Unit (CPU) .................................................. 27
3.7 Expansion Cards ........................................................................ 28
3.7.1 Expansion Card Installation Procedure ............................ 28
3.7.2 Assigning IRQs for Expansion Cards .............................. 30
3.7.3 Accelerated Graphics Port Pro (AGP Pro) ....................... 30
3.7.4 Audio Modem Riser (AMR) Slot ..................................... 32
3.8 External Connectors ................................................................... 33
3.9 Starting Up the First Time.......................................................... 45
4. BIOS SETUP
47
4.1 Managing and Updating Your BIOS .......................................... 47
4.1.1 Upon First Use of the Computer System.......................... 47
4.1.2 Updating BIOS Procedures .............................................. 48
4.2 BIOS Setup Program.................................................................. 51
4.2.1 BIOS Menu Bar ................................................................ 52
4.2.2 Legend Bar ....................................................................... 52
4
ASUS A7M266 User’s Manual
CONTENTS
4.3 Main Menu ................................................................................. 54
4.3.1 Primary & Secondary Master/Slave ................................. 55
4.3.2 Keyboard Features............................................................ 58
4.4 Advanced Menu ......................................................................... 60
4.4.1 Chip Configuration ........................................................... 63
4.4.2 I/O Device Configuration ................................................. 66
4.4.3 PCI Configuration ............................................................ 69
4.4.4 Shadow Configuration ...................................................... 73
4.5 Power Menu ............................................................................... 74
4.5.1 Power Up Control............................................................. 76
4.5.2 Hardware Monitor ............................................................ 78
4.6 Boot Menu ................................................................................. 79
4.7 Exit Menu................................................................................... 81
5. SOFTWARE SETUP
83
5.1 Install Operating System ............................................................ 83
5.2 Start Windows ............................................................................ 83
5.3 A7 Series Motherboard Support CD .......................................... 83
5.4 Uninstalling Programs................................................................ 85
6. SOFTWARE REFERENCE
87
6.1 ASUS PC Probe ......................................................................... 87
6.2 ASUS Update ............................................................................. 92
6.3 YAMAHA XGPlayer ................................................................. 93
7. APPENDIX
97
7.1 Modem Riser .............................................................................. 97
7.2 Glossary ..................................................................................... 99
ASUS A7M266 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 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! Any changes or modifications to this product not expressly ap-
proved by the manufacturer could void any assurances of safety or performance
and could result in violation of Part 15 of the FCC Rules.
Reprinted from the Code of Federal Regulations #47, part 15.193, 1993. Washington DC: Office of the
Federal Register, National Archives and Records Administration, U.S. Government Printing Office.
Canadian Department of Communications Statement
This digital apparatus does not exceed the Class B limits for radio noise emissions
from digital apparatus set out in the Radio Interference Regulations of the Canadian
Department of Communications.
This Class B digital apparatus complies with Canadian ICES-003.
Cet appareil numérique de la classe B est conforme à la norme NMB-003 du Canada.
6
ASUS A7M266 User’s Manual
1. INTRODUCTION
1.1 How This Manual Is Organized
This manual is divided into the following sections:
1. INTRODUCTION
2. FEATURES
3. HARDWARE SETUP
4. BIOS SETUP
Manual information and checklist
Production information and specifications
Instructions on setting up the motherboard.
Instructions on setting up the BIOS
5. SOFTWARE SETUP
Instructions on setting up the included software
6. SOFTWARE REFERENCE Reference material for the included software
7. APPENDIX
Optional items and general reference
1.2 Item Checklist
Check that your package is complete. If you discover damaged or missing items,
contact your retailer.
Optional Items
ASUS CIDB chassis intrusion detec-
Package Contents
(1) ASUS Motherboard
tion module
(1) 40-pin 80-conductor ribbon
cable for internal UltraDMA/
100 / UltraDMA/66 (also
compatible with UltraDMA/33
IDE drives/devices)
ASUS IrDA-compliant infrared
module
ASUS MR-I Modem Riser Card
(1) Ribbon cable for internal
UltraDMA/33 IDE drives
(1) Ribbon cable for one 5.25” and
two 3.5” floppy disk drives
(1) ASUS 2-port USB Connector Set
(1) Bag of spare jumper caps
(1) ASUS Support CD with drivers
and utilities
(1) This Motherboard User’s
Manual
ASUS A7M266 User’s Manual
7
2. FEATURES
2.1 The ASUS A7M266
The ASUS A7M266 motherboard is carefully designed for the value-conscious PC
user who wants advanced features processed by the fastest processors.
2.1.1 Specifications
•
AMDAthlon™/Duron™ Processor Support: Supports SocketA-basedAMD
Athlon™/Duron™ processors.
•
North Bridge System Chipset: AMD-761™ chipset with AGP/PCI/Memory
controller supports a 266MHz Front Side Bus (FSB), supports DDR SDRAM
DIMM, complies with AGP 2.0 specifications for 4X, 2X and 1X AGP modes
and PCI 2.2. bus interface with support for 5 PCI masters. It is optimized to
deliver enhanced AMD Athlon™ processor system performance.
•
•
“Super South” South Bridge System PCIset: VIA VT82C686B PCIset with
PCI Super-I/O Integrated Peripheral Controller (PSIPC) with support for
UltraDMA/100, which allows burst mode data transfer rates of up to 100MB/sec;
AC97 audio; USB controller with root hub and four function ports.
PC2100 / PC1600 DDR SDRAM Support: Equipped with two Double Data
Rate Dual Inline Memory Module (DDR DIMM) sockets to support up to 2GB of
DDR SDRAM. DDR SDRAM is the newest memory standard with the highest
bandwidth and lowest latency currently available and dramatically improves the
memory system’s ability to service, among others, high multimedia requirements.
•
•
Stepless Frequency Selection: Allows CPU external (FSB) frequency settings
to be set in 1MHz-increments or reduction.
JumperFree™ Mode: Allows processor settings and easy overclocking of fre-
quency and Vcore voltage all through BIOS setup when JumperFree™ mode is
enabled. Easy-to-use DIP switches instead of jumpers are included to allow
manual adjustment of the processor’s external frequency.
•
•
AGPPro Slot: SupportsAGP/AGP Pro cards for high performance, component
level interconnection targeted at 3D graphical applications supporting 133MHz
4X mode.
UltraDMA/100 Support: Comes with an onboard PCI Bus Master IDE con-
troller with two connectors that support four IDE devices on two channels. Sup-
ports UltraDMA/100, UltraDMA/66, UltraDMA/33, PIO Modes 3 & 4 and Bus
Master IDE DMA Mode 2, and Enhanced IDE devices, such as DVD-ROM,
CD-ROM, CD-R/RW, LS-120, and Tape Backup drives.
•
•
•
Wake-On-LAN Connector: Supports Wake-On-LAN activity through an op-
tional ASUS PCI-L101 10/100 Fast Ethernet PCI card (see 7. Appendix).
Wake-On-Ring Connector: Supports Wake-On-Ring activity through a PCI
modem card that supports a Wake-On-Ring connector.
USB: Supports up to 4 USB ports, two on the back panel and two midboard, for
more peripheral connectivity options.
ASUS A7M266 User’s Manual
8
2. FEATURES
•
•
One Touch Management: Supports an optionalASUS iPanel, an easy to access
box with system information LED display, front I/O ports, and space reserved
for a hard disk drive. With an ASUS iPanel, you can monitor your computer
system’s vital components.
PC Health Monitoring: Provides an easy way to examine and manage system
status information, such as CPU and systerm voltages, temperatures, and fan
status through the onboard hardware ASUS ASIC and the bundled ASUS PC
Probe.
•
•
SMBus: Features the System Management Bus interface, which is used to physi-
cally transport commands and information between SMBus devices.
PCI/AMR Expansion Slots: Provides five 32-bit PCI (Rev. 2.2) expansion
slots, which can support Bus Master PCI cards, such as SCSI or LAN cards (PCI
supports up to 133MB/s maximum throughput), and one Audio Modem Riser
(AMR) slot (shared), which supports a very affordable audio and/or modem
riser card.
•
•
Super Multi-I/O: Provides two high-speed UART compatible serial ports and
one parallel port with EPP and ECP capabilities.
Enhanced ACPI & Anti-Boot Virus Protection: Programmable BIOS (Flash
EEPROM), offering enhanced ACPI for Windows 982000/Millenium
compatibility, built-in firmware-based virus protection, and autodetection of most
devices for virtually automatic setup.
•
•
Concurrent PCI: Concurrent PCI allows multiple PCI transfers from PCI mas-
ter busses to the memory and processor.
Smart BIOS: 2Mb firmware provides Vcore and CPU/SDRAM frequency ad-
justments, boot block write protection, and HD/SCSI/MO/ZIP/CD/Floppy boot
selection.
•
•
•
Integrated Infrared (IrDA) Support: Integrated IR supports an optional re-
mote control package for wireless interfacing with external peripherals, per-
sonal gadgets, or an optional remote controller.
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.)
Color-coded Connectors: To enhance user accessibility to system components
and to meet PC 99 compliancy, major connectors in this motherboard are color-
coded.
2.1.2 Specifications – Optional Components
•
Smart Networking (optional): Features the 3Com 3C920 Fast Ethernet
controller, which supports Wired for Management, remote wake-up, and OnNow
initiatives to reduce Total Cost of Ownership (TCO).
•
PCIAudio (optional): Features Cmedia CMI8738 3D positional audio controller
with high speed PCI v2.1 bus controller and legacy SB® DSP audio emulator.
ASUS A7M266 User’s Manual
9
2. FEATURES
2.1.3 Special Features
•
ACPI Ready: Advanced Configuration Power Interface (ACPI) provides more
Energy Saving Features for operating systems that support OS Direct Power
Management (OSPM) functionality. With these features implemented in the OS,
PCs can be ready around the clock, yet satisfy all the energy saving standards.
To fully utilize the benefits of ACPI, an ACPI-supported OS, such as Windows
98/2000/Millenium must be used.
•
•
Easy Installation: Incorporates BIOS that supports autodetection of hard disk
drives, PS/2 mouse, and Plug and Play devices to make the setup of hard disk
drives, expansion cards, and other devices virtually automatic.
New Compliancy: Both the BIOS and hardware levels of this motherboard meet
the stringent requirements for PC 99 certification. The new PC 99 requirements
for systems and components are based on the following high-level goals: Sup-
port for Plug and Play compatibility and power management for configuring
and managing all system components, and 32-bit device drivers and installation
procedures for Windows95/98/NT . Color-coded connectors and descriptive icons
make identification easy as required by PC 99.
2.1.4 Performance Features
•
Concurrent PCI: Concurrent PCI allows multiple PCI transfers from PCI mas-
ter busses to the memory and processor.
•
High-Speed Data Transfer Interface: IDE transfers using UltraDMA/33 Bus
Master IDE can handle rates up to 33MB/s. This motherboard with its chipset
and support for UltraDMA/100 increases the data transfer rate to 100MB/s.
UltraDMA/100 is backward compatible with DMA/66, DMA/33, and DMA and
with existing DMA devices and systems so there is no need to upgrade current
EIDE/IDE drives and host systems. (UltraDMA100/66 require a 40-pin 80-con-
ductor cable to be enabled.)
•
DDR SDRAM Optimized Performance: This motherboard supports a new gen-
eration memory, Double Data Rate (DDR) Dynamic Random Access Memory
(SDRAM), which is compatible to the industry standard SDRAM. This new memory
technology increases performance by executing two actions per clock cycle,
resulting in data transfer rates of up to 2.1 GB/s for 133MHz DDR SDRAM and
1.6GB/s for 100MHz DDR SDRAM.
ASUS A7M266 User’s Manual
10
2. FEATURES
2.1.5 Intelligence
•
Dual Function Power Button: Pushing the power button for less than 4 sec-
onds when the system is in the working state places the system into one of two
states: sleep mode or soft-off mode, depending on the BIOS or OS setting (see
PWR Button < 4 Secs in 4.5 Power Menu). When the power button is pressed
for more than 4 seconds, the system enters the soft-off mode regardless of the
BIOS setting.
•
•
Fan Status Monitoring and Alarm: To prevent system overheat and system
damage, the CPU, power supply, and system fans can be monitored for RPM
and failure. All fans are set for its normal RPM range and alarm thresholds.
Message LED (requiresACPI OS support): Turbo LEDs now act as informa-
tion providers. Through the way a particular LED illuminates, the user can de-
termine if there are messages waiting in the mailbox. Asimple glimpse provides
useful information to the user.
•
•
Remote Ring On (requires modem): This allows a computer to be turned on
remotely through an internal or external modem. With this benefit on-hand, users
can access vital information from their computers from anywhere in the world!
System Resources Alert: Today’s operating systems such as Windows 98/
Millenium and Windows NT/2000, require much more memory and hard drive
space to present enormous user interfaces and run large applications. The sys-
tem resource monitor will warn the user before the system resources are used up
to prevent possible application crashes. Suggestions will give the user informa-
tion on managing their limited resources more efficiently.
•
•
Temperature Monitoring and Alert: CPU temperature is monitored by the
ASUS ASIC to prevent system overheat and system damage.
Voltage Monitoring and Alert: System voltage levels are monitored to ensure
stable voltage to critical motherboard components. Voltage specifications are
more critical for future processors, so monitoring is necessary to ensure proper
system configuration and management.
•
Chassis Intrusion Detection: Supports chassis-intrusion monitoring through
the ASUS ASIC. A chassis intrusion event is kept in memory on battery power
for more protection.
ASUS A7M266 User’s Manual
11
2. FEATURES
2.2 Motherboard Components
See opposite page for locations.
Location
Processor Support Socket 462 for AMD Athlon/Duron Processors ....................... 2
(NOTE: A CPU thermal sensor is integrated on the motherboard,
located near the center of the CPU heat source, just below the
CPU socket)
Chipsets AMD 761 system controller ...................................................... 1
VIA VT82C686B PCIset........................................................... 8
2Mbit Programmable Flash EEPROM ..................................... 6
Main Memory Maximum 2GB support
2 DIMM Sockets ...................................................................... 3
PC2100 / PC1600 DDR memory support
Expansion Slots 5 PCI Slots .............................................................................. 16
1 Accelerated Graphics Port (AGP) Pro Slot ......................... 17
1 Audio Modem Riser (AMR) Slot ........................ (Shared) 13
System I/O 1 Floppy Disk Driver Connector .............................................. 5
2 IDE Connectors (UltraDMA/100 Support) ........................... 4
1 Parallel Port Connector ............................................. (Top) 21
1 Serial COM1 Port Connector .............................. (Bottom) 22
1 Serial COM2 Port Connector .............................. (Bottom) 20
USB Connectors (Port 0 & Port 1) ........................................ 23
USB Header (Port 2 & Port 3).................................................. 7
1 PS/2 Mouse Connector .............................................. (Top) 24
1 PS/2 Keyboard Connector ................................... (Bottom) 24
Audio PCI Audio Chipset (optional) ................................................. 15
1 Game/MIDI Connector (on audio model only) ......... (Top) 19
1 Line Out Connector (on audio model only) ........ (Bottom) 19
1 Line In Connector (on audio model only) ........... (Bottom) 19
1 Microphone Connector (on audio model only) ... (Bottom) 19
Network Features 3Com 3C920 Fast Ethernet Controller ................................... 14
1 LAN (RJ45) Connector ............................................. (Top) 23
Wake-On-LAN Connector...................................................... 12
Wake-On-Ring Connector ...................................................... 10
Hardware Monitoring ASUS ASIC .............................................................................. 9
3 Fan Power and Speed Monitoring Connectors
Power ATX Power Supply Connector ............................................... 18
Special Feature Onboard LED ......................................................................... 11
Form Factor ATX
ASUS A7M266 User’s Manual
12
2. FEATURES
2.2.1 Component Locations
1
2
3
4 5
24
23
22
21
20
19
18
17
16
15
14
13
12
11 10
9
8 7 6
ASUS A7M266 User’s Manual
13
3. HARDWARE SETUP
3.1 Motherboard Layout
24.5cm (9.64in)
CPU_FAN
PWR_FAN
PS/2
B: Keyboard
T: Mouse
1
1
Top:
USB
T: USB1
B: USB2
RJ-45
COM1
USBPWR1
COM2
VIO1
AMD761
Line
Out
System
Line
In
Controller
Mic
In
0
1
2
3
AUX
NB_FAN
HPHONE
MIC2
CD
Accelerated Graphic Port (AGP PRO)
PCI Slot 1
VIO
PCI Slot 2
DSCKF
AUDIO_EN
VIA
A7M266
VT82C686B
PCIset
PCI Slot 3
3Com
®
Fast
CR2032 3V
Lithium Cell
CMOS Power
Enternet
WOLCON
LAN_EN
PCI Slot 4
CLRTC
JEN
USBPORT
JTPWR
CHA_FAN
USBPWR2
CHASSIS
ASUS
ASIC
with Hardware
Monitor
PCI Slot 5
VID4
IDELED
SMB
VID3
VID2
VID1
MODEM
IR
WOR
Audio Modem Riser
(AMR)
PANEL
PLED
AFPANEL
Grayed components are available only on certain models at the time of purchase.
ASUS A7M266 User’s Manual
14
3. HARDWARE SETUP
3.2 Layout Contents
Motherboard Settings
1) JEN
p. 19 JumperFree Mode (JumperFree / Jumper Mode)
2) VIO
VIO1
p. 20 Clock Generator Voltage Setting (3.30V / 3.56V / 3.45V)
+2.5V Voltage Setting (2.7V / 2.9V / 2.8V)
3) LAN_EN
p. 20 Onboard PCI LAN Setting (Disable / Enable)
4) USBPWR1/USBPWR2 p. 21 USB Device Wake Up (+5V / +5VSB)
5) AUDIO_EN
p. 21 Onboard PCI Audio Setting (Disable / Enable)
p. 22 CPU External Frequency Setting
6) DSCKF 1–4
7) VID1/VID2/VID3/VID4 p. 24 Voltage Regulator Output Setting
Expansion Slots/Sockets
1) DDR System Memory p. 25 System Memory Support
2) DIMM1/2
p. 26 DDR DIMM Memory Module Support
3) Socket 462 (Socket A) p. 27 CPU Support
4) PCI1/2/3/4/5
5) AGP PRO
6) AMR
p. 29 32-bit PCI Bus Expansion Slots
p. 31 Accelerated Graphics Port (AGP) Pro
p. 32 Audio Modem Riser (AMR) Slot
Connectors
1) PS2KBMS
p. 33 PS/2 Mouse Porv Connector (6 pin female)
p. 33 PS/2 Keyboard Port Connector (6 pin female)
p. 34 Universal Serial Bus Connectors 0 & 1 (Two 4 pin female)
p. 34 Serial Port Connector (9 pin male)
2) PS2KBMS
3) USB
4) COM1/COM2
5) PRINTER
6) GAME_AUDIO
7) GAME_AUDIO
8) RJ45
p. 34 Parallel Port Connector (25 pin female)
p. 35 Game/MIDI Connector (15 pin female) (optional)
p. 35 Audio Port Connectors (Three 1/8”) (optional)
p. 35 Fast-Ethernet Port Connector (RJ45) (optional)
p. 36 Floppy Disk Drive Connector (34 pins)
p. 36 IDE Connectors (Two 40-1 pins)
9) FLOPPY
10) PRIMARY IDE
SECONDARY IDE
11) CHASSIS
12) IR
p. 37 Chassis Intrusion Lead (4-1 pins)
p. 37 Infrared Module Connector (5 pins)
p. 38 Wake-On-LAN Connector (3 pins)
p. 38 Wake-On-Ring Connector (2 pins)
13) WOLCON
14) WOR
15) CHA_FAN
PWR_FAN
CPU_FAN
NB_FAN
p. 39 Chassis, Power Supply, CPU, Chipset Fan Connectors (3 pins)
16) USBPORT
17) SMB
p. 40 USB Header (10-1 pins)
p. 40 SMBus Connector (5-1 pins)
p. 41 ASUS iPanel Connector (24-1 pins)
18) AFPANEL
continued...
ASUS A7M266 User’s Manual
15
3. HARDWARE SETUP
19) JTPWR
20) ATXPWR
21) IDELED
p. 41 Power Supply Thermal Sensor Connector (2 pins)
p. 42 ATX Power Supply Connector (20 pins)
p. 42 IDE Activity LED (2 pins)
22) PWR.LED (PANEL
)
p. 43 System Power LED Lead (3 pins)
p. 43 System Warning Speaker Connector (4 pins)
p. 43 System Message LED (2 pins)
23) SPEAKER (PANEL)
24) MSG.LED (PANEL)
25) SMI (PANEL)
p. 43 System Management Interrupt Lead (2 pins)
p. 43 ATX / Soft-Off Switch Lead (2 pins)
p. 43 Reset Switch Lead (2 pins)
26) PWR.SW (PANEL)
27) RESET (PANEL)
ASUS A7M266 User’s Manual
16
3. HARDWARE SETUP
3.3 Getting Started
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
ASUS A7M266 User’s Manual
17
3. HARDWARE SETUP
3.4 Motherboard Settings
This section explains in detail how to change your motherboard’s function settings
through the use of switches and/or jumpers.
WARNING! Computer motherboards and expansion cards contain very delicate
Integrated Circuit (IC) chips. To protect them against damage from static electric-
ity, 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.
5. Ensure that the ATX power supply is switched off before you plug in or
remove the ATX power connector on the motherboard.
WARNING! Make sure that you unplug your power supply when adding or re-
moving system components. Failure to do so may cause severe damage to your
motherboard, peripherals, and/or components. The onboard LED when lit acts as
a reminder that the system is in suspend or soft-off mode and not powered OFF.
A7M266
®
ON
OFF
Standby
Power
Powered
Off
A7M266 Onboard LED
ASUS A7M266 User’s Manual
18
3. HARDWARE SETUP
Motherboard Features Settings (DIP Switches - DSCKF)
The motherboard’s onboard functions are adjusted through the DIP switches. The
white block represents the switch’s position. The example below shows all the
switches in the OFF position.
DSCKF
1. Frequency Selection
2. Frequency Selection
3. Frequency Selection
4. Frequency Selection
A7M266
®
A7M266 DIP Switch
OFF
ON
1) JumperFree™ Mode (JEN)
This jumper allows you to enable or disable the JumperFree™ mode. The
JumperFree™ mode allows processor settings to be made through the BIOS
setup (see 4.4 Advanced Menu).
Setting
JumperFree
Jumper Mode
JEN
[2-3] (default)
[1-2]
3 4
VID4
VID3
VID2
VID1
A7M266
®
2 3
1 2
Jumper Mode
Jumper Free
(Default)
JEN
A7M266 JumperFree Mode Setting
NOTE: In JumperFree™ mode, all VID1-4 must be set to [3-4].
ASUS A7M266 User’s Manual
19
3. HARDWARE SETUP
2) Voltage Settings (VIO/VIO1)
VIO allows you to select the voltage supplied to the clock generator and VIO1
(for overclocking only) allows you to select the voltage supplied to the chipset
and DDR DIMM modules. The default voltage should be used for better system
reliability.
Setting
2.7 Volt
2.9 Volt
2.8 Volt
VIO1
[1-2] (default)
[2-3]
Setting
VIO
[1-2] (default)
[2-3]
3.30 Volt
3.56 Volt
3.45 Volt
[3-4]
[3-4]
VIO1
4
3
3
2
2
1
2.8 Volt
2.9 Volt
2.7 Volt
(default)
VIO
4
3
3
2
A7M266
®
2
1
3.45 Volt
3.56 Volt
3.30 Volt
(default)
A7M266 Voltage Settings
WARNING! Using a higher voltage may help when overclocking but may result
in the shortening of your computer component’s life. It is strongly recommended
that you leave these settings on their default.
3) Onboard PCI LAN Setting (LAN_EN) (optional)
The onboard LAN may be enabled or disabled using this jumper.
Setting
Disable
Enable
LAN_EN
[1-2]
[2-3] (default)
LAN_EN
1 2
2 3
A7M266
®
Disable
Enable
(default)
A7M266 Lan Setting
ASUS A7M266 User’s Manual
20
3. HARDWARE SETUP
4) USB Device Wake Up (USBPWR1, USBPWR2)
Set these jumpers to +5V to allow wake up from the S1 sleep state (CPU stopped;
RAM refreshed; system running in a low power mode) using connected USB
devices and +5VSB to allow wake up from the S3 sleep state (no power to CPU;
RAM in slow refresh; power supply in a reduced power mode). An ATX power
supply that can supply at least 2A on the +5VSB lead is required when these
jumpers are set to +5VSB. The default is set to +5V because not all computers
have the appropriate ATX power supply. Your computer will not power ON if you
set this to +5VSB and do not have the appropriate ATX power supply.
Setting
+5V
+5VSB
USBPWR1, USBPWR2
[2-3] (default)
[1-2]
USBPWR1
USBPWR2
1 2
+5VSB
2 3
+5V
(default)
A7M266
®
A7M266 USB Device Wake Up
5) Onboard PCI Audio Setting (AUDIO_EN) (optional)
The onboard PCI audio may be enabled or disabled using this jumper.
Setting
Disable
Enable
AUDIO_EN
[1-2]
[2-3] (default)
AUDIO_EN
1 2
2 3
Disable
Enable
(Default)
A7M266
®
A7M266 Onboard Audio Setting
ASUS A7M266 User’s Manual
21
3. HARDWARE SETUP
6) CPU External Frequency Setting (DSCKF Switches 1–4)
This option tells the clock generator what frequency to send to the CPU, SDRAM,
and the chipset. This allows the selection of the CPU’s External frequency. The
CPU External Frequency multiplied by the Frequency Multiple equals the CPU’s
Internal frequency (the advertised CPU speed).
IMPORTANT:
1. To use this feature, JEN [see 1) JumperFree™ Mode (JEN) in 3. HARD-
WARE SETUP] must be set to Jumper mode or [1-2].
2. In JumperFree mode, all dip switches (DSW-1–DSW-4) must be set to OFF.
3. When JumperFree mode is enabled, use BIOS setup in place of these switches
(set Operating Frequency Setting to User Define under 4.4Advanced Menu
in BIOS Setup so you can set the CPU Frequency).
DSCKF
CPU
100MHz
103MHz
105MHz
A7M266
®
CPU
110MHz
115MHz
133MHz
A7M266 CPU External Frequency Selection
WARNING! Frequencies other than the recommended CPU bus frequencies are
not guaranteed to be stable. Overclocking your processor is not recommended. It
may result in a slower speed and premature wearing of the processor.
ASUS A7M266 User’s Manual
22
3. HARDWARE SETUP
Manual CPU Settings
NOTE: JumperFree mode must be disabled .
Set the DIP switches by the internal speed of your processor as follows:
(CPU Bus Freq.)
CPU
Freq.
1.2GHz
1GHz
1.1GHz
1GHz
950MHz
900MHz
850MHz
800MHz
750MHz
700MHz
650MHz
600MHz
Mult.
9.0x
7.5x
11.0x
10.0x
9.5x
9.0x
8.5x
8.0x
7.5x
7.0x
6.5x
6.0x
Bus F.
1
2
3
4
Athlon
Athlon
Athlon
Athlon
Athlon
Athlon
Athlon
Athlon
Athlon
Athlon
Athlon
Athlon
133MHz
133MHz
100MHz
100MHz
100MHz
100MHz
100MHz
100MHz
100MHz
100MHz
100MHz
100MHz
[ON]
[ON]
[ON] [ON] [OFF]
[ON] [ON] [OFF]
[ON] [OFF] [ON]
[ON] [OFF] [ON]
[ON] [OFF] [ON]
[ON] [OFF] [ON]
[ON] [OFF] [ON]
[ON] [OFF] [ON]
[ON] [OFF] [ON]
[ON] [OFF] [ON]
[ON] [OFF] [ON]
[ON] [OFF] [ON]
[ON]
[ON]
[ON]
[ON]
[ON]
[ON]
[ON]
[ON]
[ON]
[ON]
Duron
Duron
Duron
750MHz
700MHz
650MHz
7.5x
7.0x
6.5x
100MHz
100MHz
100MHz
[ON] [OFF] [ON]
[ON] [OFF] [ON]
[ON] [OFF] [ON]
[ON]
[ON]
[ON]
For updated processor settings, visit the ASUS web site (see ASUS CONTACT INFORMATION).
ASUS A7M266 User’s Manual
23
3. HARDWARE SETUP
7) Voltage Regulator Output Setting (VID1, VID2, VID3, VID4)
This jumpers allow you to manually adjust the CPU core voltage. It is recom-
mended to use CPU Default as the CPU core voltage. CPU Default means the
Vcore is generated according to the CPU VID configuration. For each jumper
setting, there are two voltage options, depending on the CPU used.
1 2 3 4
1 2 3 4
1 2 3 4
VID4
VID3
VID2
VID1
1.85/1.825Volts 1.8/1.775Volts 1.75/1.725Volts
VID4
VID3
VID2
VID1
1.7/1.675Volts
1.65/1.625Volts 1.6/1.575Volts
VID4
VID3
VID2
VID1
1.55/1.525Volts 1.50/1.475Volts 1.45/1.425Volts
VID4
VID3
VID2
VID1
A7M266
®
1.30/1.275Volts
1.40/1.375Volts 1.35/1.325Volts
VID4
VID3
VID2
VID1
A7M266 CPU Core Voltage
Selection
1.25/1.225Volts
1.20/1.175Volts 1.15/1.125Volts
VID4
VID3
VID2
VID1
1.10/1.075Volts CPU Default/
JumperFree
(Default)
ASUS A7M266 User’s Manual
24
3. HARDWARE SETUP
3.5 System Memory (DDR DIMM)
This motherboard uses only Double Data Rate (DDR) Dual Inline Memory Modules
(DIMMs). Two sockets are available for 2.5Volt (power level) unbuffered/registered
Double Data Rate Synchronous Dynamic Random Access Memory (DDR SDRAM)
of 64MB, 128MB, 256MB, 512MB, 1GB to form a memory size between 64MB to
2GB. One side (with memory chips) of the DIMM takes up one row on the motherboard.
DDR DIMMs support non-ECC modules (used on desktops/laptops) available in
registered (typically used in servers) and unbuffered (typically used in PCs) ver-
sions.
NOTE: The DDR memory bus runs at the same frequency as the CPU front side bus.
Install memory in any combination as follows:
DIMM Location
184-pin DIMM
Total Memory
Socket 1 (Rows 0&1)
Socket 2 (Rows 2&3)
64MB, 128MB, 256MB, 512MB, 1GB x1
64MB, 128MB, 256MB, 512MB, 1GB x1
Total System Memory (Max 2GB)
=
ASUS A7M266 Qualified DDR DIMM Vendor List
The following lists the memory modules that have been tested and qualified for use
with this motherboard.
Vendor
Model
Type / Size
Manufacturer
Samsung
Samsung
Samsung
Samsung
Micron
Micron
TwinMOS
HCD
M368L1713BT1-CB0
M368L1713BT1-CA0
M368L3313BT1-CB0
M368L3313BT1-CA0
MT8VDDT864AG-265A2
PC2100 / 128MB
PC1600 / 128MB
PC2100 / 256MB
PC1600 / 256MB
PC2100 / 64MB
Samsung K4H280838B-TCB0
Samsung K4H280838B-TCA0
Samsung K4H280838B-TCB0
Samsung K4H280838B-TCA0
Micron 46V8M8-75
MT16VDDT1664AG-265A2 PC2100 / 128MB
Micron 46V8M8-75
N/A
N/A
N/A
N/A
PC2100 / 128MB
PC2100 / 64MB
PC2100 / 128MB
PC2100 / 256MB
Hyundai HY5DU28822
Micron 46V8M8-75
HCD
Micron 46V8M8-75
HCD
Samsung K4H280838B-TCB0
ASUS A7M266 User’s Manual
25
3. HARDWARE SETUP
3.5.1 General DIMM Notes
•
•
DIMMs that have more than 18 chips are not supported on this motherboard.
For the system CPU bus to operate at 200MHz/266MHz, use only PC1600-/
PC2100-compliant DIMMs.
•
ASUS motherboards support SPD (Serial Presence Detect) DIMMs. This is the
memory of choice for best performance vs. stability.
•
•
BIOS shows SDRAM memory on bootup screen.
Single-sided DDR DIMMs come in 64, 128, and 256MB; double-sided come in
128, 256, and 512MB.
WARNING! Be sure that the DIMMs you use can handle the specified DDR
SDRAM MHz or else bootup will not be possible.
3.5.2 Memory Installation
WARNING! Make sure that you unplug your power supply when adding or
removing memory modules or other system components. Failure to do so may
cause severe damage to both your motherboard and expansion cards (see 3.3
Hardware Setup Procedure for more information).
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 shown. A 184-pin DDR
SDRAM DIMM has a single notch slightly to the right of center.
A7M266
®
A7M266 184-Pin DDR DIMM Sockets
This motherboard supports three pairs of differential clock signals per DIMM.
ASUS A7M266 User’s Manual
26
3. HARDWARE SETUP
3.6 Central Processing Unit (CPU)
The motherboard provides a Socket 462 or Socket A for CPU installation. The CPU
that came with the motherboard should have a fan and heatsink attached to it to
prevent overheating. If this is not the case, then purchase and install a set before you
turn on your system.
WARNING! Make sure that the heatsink is mounted tightly against the processor.
Make sure also that there is sufficient air circulation across the processor’s heat-
sink by regularly checking that your CPU fan is working. Without sufficient cir-
culation, 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 Socket
462 and open it by first pulling the lever sideways away from the socket then up-
wards to a 90-degree angle. Insert the CPU with the correct orientation as shown.
The notched corner should be orientated toward the blank space on the socket near-
est the lever. Because the CPU has a corner pin for two of the four corners, the CPU
will only fit in the orientation as shown. The picture is for reference only; you should
have a CPU fan and heatsink that covers the face of the CPU. With the added weight
of the CPU fan and heatsink, no force is required to insert the CPU. Once com-
pletely inserted, close the socket’s lever while holding down the CPU.
NOTES
1. When inserting or removing the CPU, make sure the ZIF socket arm is fully
extended (90˚-100˚ upright) and that the CPU is kept parallel to the socket. Do
NOT force the CPU into the socket as it will damage the pins. It should drop into
the socket with minimal pressure. If not, check the CPU for bent pins or check
the orientation of the CPU.
2. Do not forget to set the correct Bus Frequency for your processor or else boot-up
may not be possible.
3. Socket A processors require a socket mounted thermal resistor.
CAUTION! Be careful not to scrape the motherboard when mounting/unmounting
a clamp-style processor fan or else damage may occur to the motherboard.
BLANK
LEVER
LOCK
AMD™ Athlon
A7M266
®
A7M266 Socket A
NOTCH
ASUS A7M266 User’s Manual
27
3. HARDWARE SETUP
(This page was intentionally left blank.)
28
ASUS A7M266 User’s Manual
3. HARDWARE SETUP
3.7 Expansion Cards
WARNING! 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.
3.7.1 Expansion Card Installation Procedure
1. Read the documentation for your expansion card and make any necessary hard-
ware or software settings for your expansion card, such as jumpers.
2. Remove your computer system’s cover and the bracket plate on the slot you
intend to use. Keep the bracket for possible future use.
3. Carefully align the card’s connectors and press firmly.
4. Secure the card on the slot with the screw you removed above.
5. Replace the computer system’s cover.
6. Set up the BIOS if necessary
(such as IRQ xx Used By ISA: Yes in 4.4.3 PCI Configuration)
7. Install the necessary software drivers for your expansion card.
ASUS A7M266 User’s Manual
29
3. HARDWARE SETUP
3.7.2 Assigning IRQs for Expansion Cards
Some expansion cards need an IRQ to operate. Generally, an IRQ must be exclu-
sively assigned to one use. In a standard design, there are 16 IRQs available but
most of them are already in use, leaving 6 IRQs free for expansion cards. If your
motherboard has PCI audio onboard, an additional IRQ will be used. If your moth-
erboard also has MIDI enabled, another IRQ will be used, leaving 4 IRQs free.
IMPORTANT: If using PCI cards on shared slots, make sure that the drivers sup-
port “Share IRQ” or that the cards do not need IRQ assignments. Conflicts will
arise between the two PCI groups that will make the system unstable or cards inop-
erable.
The following table lists the default IRQ assignments for standard PC devices. Use
this table when configuring your system and for resolving IRQ conflicts.
Standard Interrupt Assignments
IRQ
0
1
Priority
Standard Function
System Timer
Keyboard Controller
1
2
2
N/A
11
12
13
14
15
3
4
5
6
7
Programmable Interrupt
Communications Port (COM2)
Communications Port (COM1)
Sound Card (sometimes LPT2)
Floppy Disk Controller
Printer Port (LPT1)
System CMOS/Real Time Clock
ACPI Mode when used
IRQ Holder for PCI Steering
IRQ Holder for PCI Steering
PS/2 Compatible Mouse Port
Numeric Data Processor
Primary IDE Channel
3*
4*
5*
6
7*
8
9*
10*
11*
12*
13
14*
15*
8
9
10
Secondary IDE Channel
*These IRQs are usually available for PCI devices.
Interrupt Request Table for this Motherboard
INT-A
shared
—
INT-B
—
shared
—
INT-C
—
—
shared
—
—
INT-D
—
—
PCI slot 1
PCI slot 2
PCI slot 3
—
—
PCI slot 4
—
—
shared
shared
—
—
—
PCI slot 5
—
—
AGP Pro slot
Onboard PCI audio
AMR devices
Onboard USB controller
shared
—
—
shared
shared
—
—
shared
shared
—
—
—
shared
30
ASUS A7M266 User’s Manual
3. HARDWARE SETUP
3.7.3 Accelerated Graphics Port Pro (AGP Pro)
This motherboard provides an Accelerated Graphics Port Pro (AGP Pro) slot to sup-
port AGP/AGP Pro graphics cards, such as an ASUS AGP-V6800DDR/64M.
CAUTION! To avoid damaging yourAGP/AGP Pro graphics card, your computer’s
power supply should be unplugged before inserting your graphics card into the slot.
AGP Card without Retention Notch
A7M266
®
TOP VIEW
28-pin bay
20-pin bay
Rib (inside slot)
Rib
A7M266 Accelerated Graphics Port (AGP PRO)
CAUTION! The AGP Pro slot is shipped with a safety tab on the 20-pin bay for
use with AGP cards without a retention notch. DO NOT remove this tab if you
will be using such cards; removing may cause these cards to shift, which may
cause damage to your card, slot, and motherboard. Remove
ONLY when you will be using an AGP Pro card. Use a rigid tip,
such as a pen tip, to dislodge and remove the tab from the bay.
Removing the tab
ASUS A7M266 User’s Manual
31
3. HARDWARE SETUP
3.7.4 Audio Modem Riser (AMR) Slot
This connector supports a specially designed audio and/or modem card called anAMR.
Main processing is done through software and controlled by the motherboard’s sys-
tem chipset. This provides an upgradeable audio and/or modem solution at an incred-
ibly low cost.
IMPORTANT: The AMR slot of this motherboard shares the same expansion slot
as PCI Slot 5. Because of this and its location, the slot can only accept a specially
designed AMR card (optional). The components of a standard AMR card and its
bracket face toward the edge of the motherboard while those of the specially-
designed card face the expansion slots. For availability, see your vendor or dealer.
A7M266
®
A7M266 Audio Modem Riser (AMR) Slot
32
ASUS A7M266 User’s Manual
3. HARDWARE SETUP
3.8 External Connectors
WARNING! Some pins are used for connectors or power sources. These are
clearly distinguished from jumpers in the Motherboard Layout. Placing jumper
caps over these connector pins will cause damage to your motherboard.
IMPORTANT: Ribbon cables should always be connected with the red stripe to
Pin 1 on the connectors. Pin 1 is usually on the side closest to the power connec-
tor on hard drives and CD-ROM drives, but may be on the opposite side on
floppy disk drives. Check the connectors before installation because there may
be exceptions. IDE ribbon cable must be less than 46 cm (18 in.), with the sec-
ond drive connector no more than 15 cm (6 in.) from the first connector.
1) PS/2 Mouse Connector (Green 6-pin PS2KBMS)
The system will direct IRQ12 to the PS/2 mouse if one is detected. If one is not
detected, expansion cards can use IRQ12. See PS/2 Mouse Function Control
in 4.4 Advanced Menu.
PS/2 Mouse (6-pin Female)
2) PS/2 Keyboard Connector (Purple 6-pin PS2KBMS)
This connection is for a standard keyboard using an PS/2 plug (mini DIN). This
connector will not allow standard AT size (large DIN) keyboard plugs. You
may use a DIN to mini DIN adapter on standard AT keyboards.
PS/2 Keyboard (6-pin Female)
ASUS A7M266 User’s Manual
33
3. HARDWARE SETUP
3) Universal Serial Bus Ports 0 & 1 (Black two 4-pin USB)
Two USB ports are available for connecting USB devices. An optional USB
header is available if you need more USB ports.
USB 0
Universal Serial Bus (USB) 1
4) Serial Port Connectors (Teal/Turquoise 9-pin COM1 / COM2)
Two serial ports can be used for pointing devices or other serial devices. For
setting up these ports, see Onboard Serial Port 1 in 4.4.2 I/O Device Configu-
ration for settings.
COM1
COM2
Serial Ports (9-pin Male)
5) Parallel Port Connector (Burgundy 25-pin PRINTER)
You can enable the parallel port and choose the IRQ through Onboard Parallel
Port (see 4.4.2 I/O Device Configuration).
NOTE: Serial printers must be connected to the serial port.
Parallel Port (25-pin Female)
34
ASUS A7M266 User’s Manual
3. HARDWARE SETUP
6) Game/MIDI Connector (Gold 15-pin GAME_AUDIO) (optional)
You may connect game joysticks or game pads to this connector for playing
games. Connect MIDI devices for playing or editing professional audio.
Game/MIDI (15-pin Female)
7) Audio Port Connectors (Three 1/8” GAME_AUDIO) (optional)
Line Out (lime) can be connected to headphones or preferably powered speak-
ers. Line In (light blue) allows tape players or other audio sources to be re-
corded by your computer or played through the Line Out (lime). Mic (pink)
allows microphones to be connected for inputting voice.
NOTE: (Only on model with onboard PCI audio) To set up a four speaker
system, connect rear side speakers to the Line In connector and enable the C-
Media 4-speaker function (see 6.4.2 Enabling 4-Speaker Function).
Line Out Line In Mic
1/8" Stereo Audio Connectors
8) Fast-Ethernet Port Connector (RJ45) (optional)
The RJ45 connector is optional at the time of purchase and is located on top of
the USB connectors. the connector allows the motherboard to connect to a Local
Area Network (LAN) through a network hub.
RJ45
ASUS A7M266 User’s Manual
35
3. HARDWARE SETUP
9) Floppy Disk Drive Connector (34-1 pin FLOPPY)
This connector supports the provided floppy drive ribbon cable. After connect-
ing the single end to the board, connect the two plugs on the other end to the
floppy drives. (Pin 5 is removed to prevent inserting in the wrong orienta-
tion when using ribbon cables with pin 5 plugged).
FLOPPY
NOTE: Orient the red markings on
the floppy ribbon cable to PIN 1.
A7M266
®
PIN 1
A7M266 Floppy Disk Drive Connector
10) Primary (Blue) / Secondary IDE Connectors (Two 40-1pin IDE)
These connectors support the provided UltraDMA/100 IDE hard disk ribbon
cable. Connect the cable’s blue connector to the motherboard’s primary (recom-
mended) or secondary IDE connector, and then connect the gray connector to
your UltraDMA/100 slave device (hard disk drive) and the black connector to
your UltraDMA/100 master device. It is recommended that non-UltraDMA/100
devices be connected to the secondary IDE connector. If you install two hard
disks, you must configure the second drive to Slave mode by setting its jumper
accordingly. Please refer to your hard disk documentation for the jumper settings.
BIOS now supports specific device bootup (see 4.6 Boot Menu). (Pin 20 is
removed to prevent inserting in the wrong orientation when using ribbon
cables with pin 20 plugged).
TIP: You may configure two hard disks to be both Masters with two ribbon
cables – one for the primary IDE connector and another for the secondary IDE
connector. You may install one operating system on an IDE drive and another on
a SCSI drive and select the boot disk through the BIOS.
IMPORTANT: UltraDMA100/66 IDE devices must use a 40-pin 80-conductor
IDE cable for 100MB/s transfer rates.
NOTE: Orient the red markings
(usually zigzag) on the IDE
ribbon cable to PIN 1.
A7M266
®
PIN 1
A7M266 IDE Connectors
36
ASUS A7M266 User’s Manual
3. HARDWARE SETUP
11) Chassis Intrusion Lead (4-1 pin CHASSIS)
This requires an external detection mechanism such as a chassis intrusion moni-
tor/sensor or microswitch. The sensor is triggered when a high level signal is
sent to the Chassis Signal lead, which occurs when a panel switch or light detec-
tor is triggered. This function works with an optionalASUS CIDB chassis intru-
sion module (see your vendor for more details). If the chassis intrusion lead is
not used, a jumper cap must be placed over the pins to close the circuit.
A7M266
®
1
CHASSIS
A7M266 Chassis Open Alarm Lead
12) Standard Infrared Module Connector (5-1 pin IR)
This connector supports an optional wireless transmitting and receiving infrared
module. This module mounts to a small opening on system cases that support
this feature. You must also configure the setting through UART2 Use Infrared
(see 4.4.2 I/O Device Configuration) to select whether UART2 is directed for
use with COM2 or IrDA. Use the five pins as shown in Back View and connect
a ribbon cable from the module to the motherboard’s SIR connector according
to the pin definitions.
Back View
Front View
IR
1
+5V
IRTX
GND
(NC)
A7M266
®
IRRX
A7M266 Infrared Module Connector
ASUS A7M266 User’s Manual
37
3. HARDWARE SETUP
13) Wake-On-LAN Connector (3-pin WOLCON)
This connector connects to a LAN card with a Wake-On-LAN output, such as
the ASUS PCI-L101 Ethernet card (see 7. Appendix). The connector powers up
the system when a wakeup packet or signal is received through the LAN card.
IMPORTANT: This feature requires that the Wake-On-LAN or PCI Modem
feature is enabled (see 4.5.1 Power Up Control) and that your system has an
ATX power supply with at least 720mA +5V standby power.
IMPORTANT: Requires an ATX power
supply with at least 720mA +5 volt
standby power
WOLCON
Ground
A7M266
®
PME +5 Volt Standby
A7M266 Wake-On-LAN Connector
14) Wake-On-Ring Connector (2-pin WOR)
This connector connects to internal modem cards with a Wake-On-Ring output.
The connector powers up the system when a ringup packet or signal is received
through the internal modem card. NOTE: For external modems, Wake-On-Ring
is detected through the COM port.
IMPORTANT: This feature requires that the Wake-On-LAN or PCI Modem
feature is enabled (see 4.5.1 Power Up Control) and that your system has an
ATX power supply with at least 720mA +5V standby power.
WOR
1
2
Ground
Ring#
A7M266
®
A7M266 Wake-On-Ring Connector
38
ASUS A7M266 User’s Manual
3. HARDWARE SETUP
15) Chassis, Power Supply, CPU, and Chipset Fan Connectors
(3-pin CHA_FAN, PWR_FAN, CPU_FAN, NB_FAN)
These connectors support cooling fans of 350mA (4.2 Watts) or less. Orientate
the fans so that the heat sink fins allow airflow to go across the onboard heat
sink(s) instead of the expansion slots. Depending on the fan manufacturer, the
wiring and plug may be different. The red wire should be positive, while the
black should be ground. Connect the fan’s plug to the board taking into consid-
eration the polarity of the connector.
NOTE: The “Rotation” signal is to be used only by a specially designed fan with
rotation signal. The Rotations per Minute (RPM) can be monitored usingASUS PC
Probe (see 6. SOFTWARE REFERENCE).
WARNING! The CPU and/or motherboard will overheat if there is no airflow
across the CPU and onboard heatsinks. Damage may occur to the motherboard
and/or the CPU fan if these pins are incorrectly used. These are not jumpers,
do not place jumper caps over these pins.
PWR_FAN
CPU_FAN
Rotation
+12V
GND
NB-FAN
CHA_FAN
A7M266
®
A7M266 12-Volt Cooling Fan Power
ASUS A7M266 User’s Manual
39
3. HARDWARE SETUP
16) USB Headers (10-1 pin USBPORT)
If the USB port connectors on the back panel are inadequate, two USB headers
are available for two additional USB port connectors. Connect the USB headers
to an optional 2-port USB connector set and mount the bracket to an open slot
on your chassis.
USBPORT
10
6
1
5
A7M266
®
A7M266 USB Port
Recommended Setup: Use USBPORT with the bundled 2-port connector set.
17) SMBus Connector (5-1 pin SMB)
This connector allows you to connect SMBus (System Management Bus) de-
vices. SMBus devices communicate by means of the SMBus with an SMBus
host and/or other SMBus devices. SMBus is a specific implementation of an I2C
bus, which is a multi-device bus; that is, multiple chips can be connected to the
same bus and each one can act as a master by initiating data transfer.
1
A7M266
®
SMB
A7M266 SMBus Connector
40
ASUS A7M266 User’s Manual
3. HARDWARE SETUP
18) ASUS iPanel Connector (24-1 pin AFPANEL)
This connector allows you to connect an optional ASUS iPanel, an easy to ac-
cess drive bay with front I/O ports, status LEDs, and space reserved for a hard
disk drive. If you are not using an ASUS iPanel, you can connect an optional
wireless transmitting and receiving infrared module to the SIR connector or an
optional consumer infrared connector set to the CIR and SIR connectors for
both wireless transmitting and remote control functions through one external
infrared module.
AFPANEL
SIR
CIR
Standard Infrared (SIR)
Front View Back View
A7M266
®
IR_CON
A7M266 Front Panel Connector
+5V
(NC)
IRTX
GND
IRRX
19) Power Supply Thermal Sensor Connector (2-pin block JTPWR)
If you have a power supply with thermal monitoring, connect its thermal sensor
cable to this connector.
JTPWR
Thermal Sensor
for Power Supply
A7M266
®
A7M266 Thermal Sensor Connectors
ASUS A7M266 User’s Manual
41
3. HARDWARE SETUP
20) ATX Power Supply Connector (20-pin block ATXPWR)
This connector connects to an ATX power supply. The plug from the power sup-
ply will only insert in one orientation because of the different hole sizes. Find the
proper orientation and push down firmly making sure that the pins are aligned.
IMPORTANT: Make sure that yourATX power supply can supply at least 10mA
on the +5-volt standby lead (+5VSB). You may experience difficulty in power-
ing ON your system if your power supply cannot support the load. For Wake-
On-LAN support, your ATX power supply must supply at least 720mA +5VSB.
+12.0Volts
+5V Standby
Power Good
Ground
+5.0 Volts
+5.0 Volts
-5.0 Volts
Ground
Ground
+5.0 Volts
Ground
Power Supply On
Ground
Ground
+5.0 Volts
Ground
-12.0Volts
+3.3 Volts
A7M266
®
+3.3Volts
+3.3 Volts
ATX
A7M266 ATX Power Connector
21) IDE Activity LED (2-pin IDELED)
This connector supplies power to the cabinet’s IDE activity LED. Read and
write activity by devices connected to the Primary/Secondary IDE and Primary/
Secondary ATA100 connectors will cause the LED to light up.
TIP: If the case-mounted LED does not
light, try reversing the 2-pin plug.
A7M266
IDELED
®
A7M266 IDE Activity LED
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ASUS A7M266 User’s Manual
3. HARDWARE SETUP
The following PANEL illustration is used for items 22–27
Speaker
Connector
Power LED
Reset SW
A7M266
Message LED
SMI Lead
®
ATX Power
Switch*
*
Requires an ATX power supply.
A7M266 System Panel Connectors
22) System Power LED Lead (3-1 pin PWR.LED)
This 3-1 pin connector connects to the system power LED, which lights when
the system is powered on and blinks when it is in sleep or soft-off mode.
23) System Warning Speaker Connector (4-pin SPEAKER)
This 4-pin connector connects to the case-mounted speaker.
24) System Message LED Lead (2-pin MSG.LED)
This indicates whether a message has been received from a fax/modem. The
LED will remain lit when there is no signal and blink when there is data re-
ceived. This function requires an ACPI OS and driver support.
25) System Management Interrupt Lead (2-pin SMI)
This allows the user to manually place the system into a suspend mode or “Green”
mode where system activity will be instantly decreased to save electricity and
expand the life of certain components when the system is not in use. This 2-pin
connector (see the preceding figure) connects to the case-mounted suspend switch.
26) ATX Power Switch / Soft-Off Switch Lead (2-pin PWR.SW)
The system power is controlled by a momentary switch connected to this lead.
Pushing the button once will switch the system between ON and SLEEP or ON
and SOFT OFF, depending on your BIOS or OS setting. Pushing the switch
while in the ON mode for more than 4 seconds will turn the system off. The
system power LED shows the status of the system’s power.
27) Reset Switch Lead (2-pin RESET)
This 2-pin connector connects to the case-mounted reset switch for rebooting
your computer without having to turn off your power switch. This is a preferred
method of rebooting to prolong the life of the system’s power supply.
ASUS A7M266 User’s Manual
43
3. HARDWARE SETUP
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ASUS A7M266 User’s Manual
3. HARDWARE SETUP
3.9 Starting Up the First Time
1. After all connections are made, close the system case cover.
2. Be sure that all switches are off (in some systems, marked with ).
3. Connect the power supply cord into the power supply located on the
back of your system case according to your system user’s manual.
4. Connect the power cord into a power outlet that is equipped with a surge
protector.
5. You may then turn on your devices in the following order:
a. Your monitor
b. External SCSI devices (starting with the last device on the chain)
c. Your system power. For ATX power supplies, you need to switch on
the power supply as well as press the ATX power switch on the front
of the case.
6. The power LED on the front panel of the system case will light. For
ATX power supplies, the system LED will light when the ATX power
switch is pressed. The LED on the monitor may light up or switch be-
tween orange and green after the system’s if it complies with “green”
standards or if it has a power standby feature. The system will then run
power-on tests. While the tests are running, the BIOS will alarm beeps
or additional messages will appear on the screen. If you do not see any-
thing within 30 seconds from the time you turn on the power, the system
may have failed a power-on test. Recheck your jumper settings and con-
nections or call your retailer for assistance.
Award BIOS Beep Codes
Beep
Meaning
One short beep when
displaying logo
No error during POST
Long beeps in an endless loop
One long beep followed by
three short beeps
No DRAM installed or detected
Video card not found or video card
memory bad
High frequency beeps when
system is working
CPU overheated
System running at a lower frequency
ASUS A7M266 User’s Manual
45
3. HARDWARE SETUP
7. During power-on, hold down <Delete> to enter BIOS setup. Follow the
instructions in 4. BIOS SETUP.
* Powering Off your computer: You must first exit or shut down your
operating system before switching off the power switch. ForATX power
supplies, you can press the ATX power switch after exiting or shutting
down your operating system. If you use Windows 9X, click the Start
button, click Shut Down, and then click Shut down the computer?
The power supply should turn off after Windows shuts down.
NOTE: The message “You can now safely turn off your computer” will
not appear when shutting down with ATX power supplies.
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ASUS A7M266 User’s Manual
4. BIOS SETUP
4.1 Managing and Updating Your BIOS
4.1.1 Upon First Use of the Computer System
It is recommended that you save a copy of the original motherboard BIOS
along with a Flash Memory Writer utility (AFLASH.EXE) to a bootable
floppy disk in case you need to reinstall the BIOS later. AFLASH.EXE is a
Flash Memory Writer utility that updates the BIOS by uploading a new
BIOS file to the programmable flash ROM on the motherboard. This file
works only in DOS mode. To determine the BIOS version of your mother-
board, check the last four numbers of the code displayed on the upper left-
hand corner of your screen during bootup. Larger numbers represent a newer
BIOS file.
1. Type FORMAT A:/S at the DOS prompt to create a bootable system
floppy disk. DO NOT copy AUTOEXEC.BAT & CONFIG.SYS to the
disk.
2. Type COPYD:\AFLASH\AFLASH.EXEA:\ (assuming D is your CD-
ROM drive) to copy AFLASH.EXE to the just created boot disk.
NOTE: AFLASH works only in DOS mode. It will not work with DOS
prompt in Windows and will not work with certain memory drivers that
may be loaded when you boot from your hard drive. It is recommended
that you reboot using a floppy.
3. Reboot your computer from the floppy disk. NOTE: BIOS setup must
specify “Floppy” as the first item in the boot sequence.
4. In DOS mode, type A:\AFLASH <Enter> to run AFLASH.
IMPORTANT! If “unknown” is displayed after Flash Memory:, the memory
chip is either not programmable or is not supported by theACPI BIOS and there-
fore, cannot be programmed by the Flash Memory Writer utility.
ASUS A7M266 User’s Manual
47
4. BIOS SETUP
5. Select 1. Save Current BIOS to File from the Main menu and press
<Enter>. The Save Current BIOS To File screen appears.
6. Type a filename and the path, for example, A:\XXX-XX.XXX and then
press <Enter>.
4.1.2 Updating BIOS Procedures
WARNING! Only update your BIOS if you have problems with your mother-
board and you know that the new BIOS revision will solve your problems. Care-
less updating can result in your motherboard having more problems!
1. Download an updated ASUS BIOS file from the Internet (WWW or
FTP) (see ASUS CONTACT INFORMATION on page 3 for details)
and save to the disk you created earlier.
2. Boot from the disk you created earlier.
3. At the “A:\” prompt, type AFLASH and then press <Enter>.
4. At the Main Menu, type 2 and then press <Enter>. The Update BIOS
Including Boot Block and ESCD screen appears.
5. Type the filename of your new BIOS and the path, for example, A:\XXX-
XX.XXX, and then press <Enter>.
NOTE: To cancel this operation, press <Enter>.
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ASUS A7M266 User’s Manual
4. BIOS SETUP
6. When prompted to confirm the BIOS update, press Y to start the update.
7. The utility starts to program the new BIOS information into the flash
ROM. The boot block will be updated automatically only when neces-
sary. This will minimize the chance that a failed update will prevent
your system from booting up. When the programming is finished, Flashed
Successfully will be displayed.
8. Follow the onscreen instructions to continue.
WARNING! If you encounter problems while updating the new BIOS, DO NOT
turn off your system since this might prevent your system from booting up. Just
repeat the process, and if the problem still persists, update the original BIOS file
you saved to disk above. If the Flash Memory Writer utility was not able to
successfully update a complete BIOS file, your system may not be able to boot
up. If this happens, your system will need servicing.
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49
4. BIOS SETUP
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ASUS A7M266 User’s Manual
4. BIOS SETUP
4.2 BIOS Setup Program
This motherboard supports a programmable EEPROM that can be updated using
the provided utility as described in 4.1 Managing and Updating Your BIOS.
The utility is used if you are installing a motherboard, reconfiguring your system,
or prompted to “Run Setup”. This section describes how to configure your system
using this utility.
Even if you are not prompted to use the Setup program, at some time in the future
you may want to change the configuration of your computer. For example, you
may want to enable the Security Password Feature or make changes to the power
management settings. It will then be necessary to reconfigure your system using
the BIOS Setup program so that the computer can recognize these changes and
record them in the CMOS RAM of the EEPROM.
The EEPROM on the motherboard stores the Setup utility. When you start up the
computer, the system provides you with the opportunity to run this program. This
appears during the Power-On Self Test (POST). Press <Delete> to call up the Setup
utility. If you are a little bit late in pressing the mentioned key, POST will continue
with its test routines, thus preventing you from calling up Setup. If you still need to
call Setup, restart the system by pressing <Ctrl> + <Alt> + <Delete>, or by press-
ing the Reset button on the system chassis. You can also restart by turning the
system off and then back on again. But do so only if the first two methods fail.
The Setup program has been designed to make it as easy to use as possible. It is a
menu-driven program, which means you can scroll through the various sub-menus
and make your selections among the predetermined choices.
To access the BIOS Setup program, press the <Delete> key after
the computer has run through its POST.
NOTE: Because the BIOS software is constantly being updated, the following
BIOS screens and descriptions are for reference purposes only and may not re-
flect your BIOS screens exactly.
ASUS A7M266 User’s Manual
51
4. BIOS SETUP
4.2.1 BIOS Menu Bar
The top of the screen has a menu bar with the following selections:
MAIN Use this menu to make changes to the basic system configuration.
ADVANCED Use this menu to enable and make changes to the advanced
features.
POWER
BOOT
EXIT
Use this menu to configure and enable Power Management
features.
Use this menu to configure the default system device used to lo-
cate and load the Operating System.
Use this menu to exit the current menu or specify how to exit the
Setup program.
To access the menu bar items, press the right or left arrow key on the keyboard
until the desired item is highlighted.
4.2.2 Legend Bar
At the bottom of the Setup screen you will notice a legend bar. The keys in the
legend bar allow you to navigate through the various setup menus. The following
table lists the keys found in the legend bar with their corresponding alternates and
functions.
Navigation Key(s)
<F1> or <Alt + H>
Function Description
Displays the General Help screen from anywhere in the BIOS
Setup
<Esc>
Jumps to the Exit menu or returns to the main menu from a sub-
menu
← or → (keypad arrow) Selects the menu item to the left or right
↑ or ↓ (keypad arrow)
Moves the highlight up or down between fields
- (minus key)
Scrolls backward through the values for the highlighted field
+ (plus key) or spacebar Scrolls forward through the values for the highlighted field
<Enter>
Brings up a selection menu for the highlighted field
Moves the cursor to the first field
<Home> or <PgUp>
<End> or <PgDn>
Moves the cursor to the last field
<F5>
Resets the current screen to its Setup Defaults
Saves changes and exits Setup
<F10>
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ASUS A7M266 User’s Manual
4. BIOS SETUP
General Help
In addition to the Item Specific Help window, the BIOS setup program also pro-
vides a General Help screen. This screen can be called up from any menu by sim-
ply pressing <F1> or the <Alt> + <H> combination. The General Help screen lists
the legend keys with their corresponding alternates and functions.
Saving Changes and Exiting the Setup Program
See 4.7 Exit Menu for detailed information on saving changes and exiting the
setup program.
Scroll Bar
When a scroll bar appears to the right of a help window, it indicates that there is
more information to be displayed that will not fit in the window. Use <PgUp> and
<PgDn> or the up and down arrow keys to scroll through the entire help docu-
ment. Press <Home> to display the first page, press <End> to go to the last page.
To exit the help window, press <Enter> or <Esc>.
Sub-Menu
Note that a right pointer symbol (as shown in the left view)
appears to the left of certain fields. This pointer indicates that
a sub-menu can be launched from this field. A sub-menu con-
tains additional options for a field parameter. To call up a sub-
menu, simply move the highlight to the field and press <En-
ter>. The sub-menu will then immediately appear. Use the
legend keys to enter values and move from field to field within
a sub-menu just as you would within a menu. Use the <Esc>
key to return to the main menu.
Take some time to familiarize yourself with each of the legend keys and their
corresponding functions. Practice navigating through the various menus and sub-
menus. If you accidentally make unwanted changes to any of the fields, use the set
default hot key <F5>. While moving around through the Setup program, note that
explanations appear in the Item Specific Help window located to the right of each
menu. This window displays the help text for the currently highlighted field.
NOTE: The item heading in square brackets represents the default setting for
that field.
ASUS A7M266 User’s Manual
53
4. BIOS SETUP
4.3 Main Menu
When the Setup program is accessed, the following screen appears:
System Time [XX:XX:XX]
Sets your system to the time that you specify (usually the current time).
The format is hour, minute, second. Valid values for hour, minute and sec-
ond are Hour: (00 to 23), Minute: (00 to 59), Second: (00 to 59). Use the
<Tab> or <Shift> + <Tab> keys to move between the hour, minute, and
second fields.
System Date [XX/XX/XXXX]
Sets your system to the date that you specify (usually the current date). The
format is month, day, year. Valid values for month, day, and year are Month:
(1 to 12), Day: (1 to 31), Year: (100 year range). Use the <Tab> or <Shift>
+ <Tab> keys to move between the month, day, and year fields.
Legacy Diskette A [1.44M, 3.5 in.], Legacy Diskette B [None]
Sets the type of floppy drives installed. Configuration options: [None]
[360K, 5.25 in.] [1.2M , 5.25 in.] [720K , 3.5 in.] [1.44M, 3.5 in.]
[2.88M, 3.5 in.]
Floppy 3 Mode Support [Disabled]
This is required to support older Japanese floppy drives. Floppy 3 Mode
support will allow reading and writing of 1.2MB (as opposed to 1.44MB)
on a 3.5-inch diskette. Configuration options: [Disabled] [Drive A]
[Drive B] [Both]
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ASUS A7M266 User’s Manual
4. BIOS SETUP
4.3.1 Primary & Secondary Master/Slave
NOTE: Before attempting to configure a hard disk drive, make sure you
have the configuration information supplied by the manufacturer of the
drive. Incorrect settings may cause your system to not recognize the in-
stalled hard disk. To allow the BIOS to detect the drive type automati-
cally, select [Auto].
Type [Auto]
Select [Auto] to automatically detect an IDE hard disk drive. If automatic
detection is successful, the correct values will be filled in for the remaining
fields on this sub-menu. If automatic detection fails, your hard disk drive
may be too old or too new. You can try updating your BIOS or enter the
IDE hard disk drive parameters manually.
NOTE: After the IDE hard disk drive information has been entered into
BIOS, new IDE hard disk drives must be partitioned (such as with FDISK)
and then formatted before data can be read from and write on. Primary
IDE hard disk drives must have its partition set to active (also possible
with FDISK).
Other options for the Type field are:
[None] - to disable IDE devices
ASUS A7M266 User’s Manual
55
4. BIOS SETUP
IMPORTANT: If your hard disk was already formatted on an older previous system,
incorrect parameters may be detected. You will need to enter the correct parameters
manually or use low-level format if you do not need the data stored on the hard disk.
If the parameters listed differ from the ones used when the disk was formatted, the
disk will not be readable. If the auto-detected parameters do not match the ones that
should be used for your disk, you should enter the correct ones manually by setting
[User Type HDD].
[User Type HDD]
Manually enter the number of cylinders, heads and sectors per track for
your drive. Refer to your drive documentation or look on the drive for this
information. If no drive is installed or if you are removing a drive and not
replacing it, select [None].
Translation Method [LBA]
Select the hard disk drive type in this field. When Logical BlockAddressing
is enabled, 28-bit addressing of the hard drive is used without regard for
cylinders, heads, or sectors. Note that LBA Mode is necessary for drives
with greater than 504MB in storage capacity. Configuration options: [LBA]
[LARGE] [Normal] [Match Partition Table] [Manual]
Cylinders
This field configures the number of cylinders. Refer to your drive docu-
mentation to determine the correct value to enter into this field. NOTE: To
make changes to this field, the Type field must be set to [User Type HDD]
and the Translation Method field must be set to [Manual].
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ASUS A7M266 User’s Manual
4. BIOS SETUP
Head
This field configures the number of read/write heads. Refer to your drive
documentation to determine the correct value to enter into this field. NOTE:
To make changes to this field, the Type field must be set to [User Type
HDD] and the Translation Method field must be set to [Manual].
Sector
This field configures the number of sectors per track. Refer to your drive
documentation to determine the correct value to enter into this field. NOTE:
To make changes to this field, the Type field must be set to [User Type
HDD] and the Translation Method field must be set to [Manual].
CHS Capacity
This field shows the drive’s maximum CHS capacity calculated automati-
cally by the BIOS from the drive information you entered.
Maximum LBA Capacity
This field shows the drive’s maximum LBA capacity calculated automati-
cally by the BIOS from the drive information you entered.
Multi-Sector Transfers [Maximum]
This option automatically sets the number of sectors per block to the high-
est number supported by the drive. This field can also be configured manu-
ally. Note that when this field is automatically configured, the set value may
not always be the fastest value for the drive. Refer to the documentation that
came with your hard drive to determine the optimal value and set it manu-
ally. NOTE: To make changes to this field, the Type field must be set to
[User Type HDD]. Configuration options: [Disabled] [2 Sectors] [4 Sec-
tors] [8 Sectors] [16 Sectors] [32 Sectors] [Maximum]
SMART Monitoring [Disabled]
This allows the enabling or disabling of the S.M.A.R.T. (Self-Monitoring,
Analysis and Reporting Technology) system which utilizes internal hard
disk drive monitoring technology. This feature is normally disabled because
system resources used in this feature may decrease system performance.
Configuration options: [Disabled] [Enabled]
PIO Mode [4]
This option lets you set a PIO (Programmed Input/Output) mode for the
IDE device. Modes 0 through 4 provide successively increased performance.
Configuration options: [0] [1] [2] [3] [4]
Ultra DMA Mode [Disabled]
Ultra DMA capability allows improved transfer speeds and data integrity
for compatible IDE devices. Set to [Disabled] to suppress Ultra DMA capa-
bility. NOTE: To make changes to this field, the Type field must be set to
[User Type HDD]. Configuration options: [0] [1] [2] [3] [4] [Disabled]
ASUS A7M266 User’s Manual
57
4. BIOS SETUP
Other options for “Type:” are:
[CD-ROM] - for IDE CD-ROM drives
[LS-120] - for LS-120 compatible floppy disk drives
[ZIP-100] - for ZIP-100 compatible disk drives
[MO] - for IDE magneto optical disk drives
[Other ATAPI Device] - for IDE devices not listed here
After using the legend keys to make your selections on this sub-menu, press
the <Esc> key to exit back to the Main menu. When the Main menu ap-
pears, you will notice that the drive size appear in the field for the hard disk
drive that you just configured.
4.3.2 Keyboard Features
Boot Up NumLock Status [On]
This field enables users to activate the Number Lock function upon system
boot. Configuration options: [Off] [On]
Keyboard Auto-Repeat Rate [12/Sec]
This controls the speed at which the system registers repeated keystrokes.
Options range from 6 to 30 characters per second. Configuration options:
[6/Sec] [8/Sec] [10/Sec] [12/Sec] [15/Sec] [20/Sec] [24/Sec] [30/Sec]
Keyboard Auto-Repeat Delay [1/4 Sec]
This field sets the time interval for displaying the first and second charac-
ters. Configuration options: [1/4 Sec] [1/2 Sec] [3/4 Sec] [1 Sec]
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ASUS A7M266 User’s Manual
4. BIOS SETUP
Language [English]
This allows selection of the BIOS’displayed language. Currently only English is available.
Supervisor Password [Disabled] / User Password [Disabled]
These fields allow you to set the passwords. To set the password, highlight the appro-
priate field and press <Enter>. Type in a password and press <Enter>. You can type up
to eight alphanumeric characters. Symbols and other keys are ignored. To confirm the
password, type the password again and press the <Enter>. The password is now set to
[Enabled]. This password allows full access to the BIOS Setup menus. To clear the
password, highlight this field and press <Enter>. The same dialog box as above will
appear. Press <Enter> and the password will be set to [Disabled].
A Note about Passwords
The BIOS Setup program allows you to specify passwords in the Main menu. The pass-
words control access to the BIOS during system startup. The passwords are not case sen-
sitive. In other words, it makes no difference whether you enter a password using upper or
lowercase letters. The BIOS Setup program allows you to specify two separate passwords:
a Supervisor password and a User password. When disabled, anyone may access all BIOS
Setup program functions. When enabled, the Supervisor password is required for entering
the BIOS Setup program and having full access to all configuration fields.
Forgot the Password?
If you forgot the password, you can clear the password by erasing the CMOS Real
Time Clock (RTC) RAM. The RAM data containing the password information is
powered by the onboard button cell battery. To erase the RTC RAM: (1) Unplug
your computer, (2) Short the solder points, (3) Turn ON your computer, (4) Hold
down <Delete> during bootup and enter BIOS setup to re-enter user preferences.
C M O S P o w e r
L i t h i u m C e l l
C R 2 0 3 2 3 V
A7M266
®
CLRTC
Short solder points
to Clear CMOS
A7M266 Clear RTC RAM
Halt On [All Errors]
This field determines which types of errors will cause the system to halt.
Configuration options: [All Errors] [No Error] [All but Keyboard] [All but
Disk] [All but Disk/Keyboard]
Installed Memory [XXX MB]
This display-only field displays the amount of conventional memory detected
by the system during bootup. You do not need to make changes to this field.
ASUS A7M266 User’s Manual
59
4. BIOS SETUP
4.4 Advanced Menu
Operating Frequency Setting [Standard]
When the motherboard is set to JumperFree™ mode, this field allows you
to configure the external frequency of your CPU. Select [User Define] if
you want to make changes to the CPU Frequency field. When [Standard]
is selected, CPU (external) Frequency will be fixed at 100MHz. Configu-
ration options: [Standard] [User Define]
CPU Clock Multiplier (when Operating Frequency Setting is set
to [User Define])
The field displays the frequency multiple between the CPU’s internal
frequency and external frequency.
Set System Operation Frequency (when Operating Frequency
Setting is set to [User Define])
This allows you to increase/decrease the system frequency in 1MHz incre-
ments.
System Frequency [100MHz]
This field displays the frequency to send to the system bus and PCI bus. The
bus frequency (external frequency) multiplied by the bus multiple equals the
CPU speed (the CPU’s internal frequency). Note that selecting a frequency
higher than what the CPU manufacturer recommends may cause the system to
hang or crash. See System Hangup later in this section.
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4. BIOS SETUP
Spread Spectrum Control [Enabled]
Leave on default setting. Spread spectrum typically reduces system electro-
magnetic interference (EMI) by 8dB to 10dB.
CPU Level 1 Cache, CPU Level 2 Cache [Enabled]
These fields allow you to choose from the default of [Enabled] or choose
[Disabled] to turn on or off the CPU’s Level 1 and Level 2 built-in cache.
Configuration options: [Disabled] [Enabled]
CPU Level 2 Cache ECC Check [Disabled]
This function controls the ECC capability in the CPU level 2 cache. Con-
figuration options: [Disabled] [Enabled]
BIOS Update [Enabled]
This functions as an update loader integrated into the BIOS to supply the
processor with the required data. In the default position of [Enabled], the
BIOS will load the update on all processors during system bootup. Configu-
ration options: [Disabled] [Enabled]
PS/2 Mouse Function Control [Auto]
The default of [Auto] allows the system to detect a PS/2 mouse on startup.
If detected, IRQ12 will be used for the PS/2 mouse. IRQ12 will be reserved
for expansion cards only if a PS/2 mouse is not detected. [Enabled] will
always reserve IRQ12, whether on startup a PS/2 mouse is detected or not.
Configuration options: [Enabled] [Auto]
USB Legacy Support [Auto]
This motherboard supports Universal Serial Bus (USB) devices. The de-
fault of [Auto] allows the system to detect a USB device on startup. If de-
tected, the USB controller will be enabled. If not detected, the USB control-
ler will be disabled. When this field is set to [Disabled], the USB controller
is disabled no matter whether you are using a USB device or not. Configu-
ration options: [Disabled] [Enabled] [Auto]
OS/2 Onboard Memory > 64M [Disabled]
When using OS/2 operating systems with installed DRAM of greater than
64MB, you need to set this option to [Enabled]; otherwise, leave this on
[Disabled]. Configuration options: [Disabled] [Enabled]
ASUS A7M266 User’s Manual
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