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Asus A7A266 16)SMBus Connector (5-1pin SMB), 15)USB Headers (10-1pin USB1, 10-1pin USB2)

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3.HARDWARE SETUP

15)USB Headers (10-1 pin USB1, 10-1 pin USB2)

If the USB port connectors on the back panel are inadequate, two USB headers are available for four additional USB port connectors. Connect each USB header to an optional 2-port USB connector set and mount the bracket to an open slot on your chassis.

A7A266

A7A266 Front Panel USB Headers

USB1

USB2

GND

USBP2+

USBP2–

USB Power

1 5

6 10

GND

USBP3+

USBP3–

USB Power

.3 H/WConnectors SETUP

16)SMBus Connector (5-1 pin SMB)

This connector allows you to connect SMBus (System Management Bus) devices. 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.

	SMB
1
A7A266
SMBCLK	Ground SMBDATA +5V

A7A266 SMBus Connector

40	ASUS A7A266 User’s Manual

Contents

Page ASUS A7A266 1.04 E828 August ASUS A7A266 User’s Manual ASUSTeK COMPUTER INC. (Asia-Pacific) ASUS COMPUTER INTERNATIONAL (America) ASUS COMPUTER GmbH (Europe) Page Page Page 1.1How This Manual Is Organized 1.2 Item Checklist 2.1The ASUS A7A266 2.1.1 Specifications 2.1.2 Optional Components 2.1.3Special Features 2.1.4 Performance Features 2.1.5Intelligence 2.2Motherboard Components 2.2.1Component Locations 3.1Motherboard Layout 3.2Layout Contents Page 3.3Getting Started 3.4Motherboard Settings Motherboard Features Settings (DIP Switches - DSW) 1) JumperFree™ Mode (JEN) Setting JEN 2)Voltage Regulator Output Setting (VID) the CPU Default CPU Default 3)DDR / SDR Memory Selection (DSW Switch 5) DDR RAM 4)CPU External Frequency Setting (DSW Switches 1–4) in 3, HARDWARE SETUP.) 5)Manual CPU Ratio Settings (DSW Switches 5-10) See 1, JumperFree™ Mode (JEN) 3, HARDWARE SETUP.) Multiplier 6)Bass Center Setting (BCS1, BCS2) (NOTE: Only available on PCB 1.10 & later versions) NOTE 3.5System Memory 3.5.1 DDR DIMM Support 3.5.2SDR DIMM Support 3.5.3 General DIMM Notes 3.5.4Memory Installation 3.6Central Processing Unit (CPU) notched corner 3.7Expansion Cards 3.7.1 Expansion Card Installation Procedure 3.7.2Assigning IRQs for Expansion Cards 3.7.3Accelerated Graphics Port Pro (AGP Pro) 3.7.4Audio Modem Riser (AMR) Slot Page 3.8Connectors 3)Universal Serial Bus Ports 0 & 1 (Black two 4-pinUSB) 4)Serial Port Connectors (Teal/Turquoise 9-pinCOM1 / COM2) Onboard Serial Port 4.4.2 I/O Device Configuration 5)Parallel Port Connector (Burgundy 25-pinPRINTER) 6)Game/MIDI Connector (Gold 15-pinGAME_AUDIO) (optional) 7)Audio Port Connectors (Three 1/8” GAME_AUDIO) (optional) Line Out Line In Mic 9)Primary (Blue) / Secondary IDE Connectors (Two 40-1pinIDE) 10)IDE Activity LED (2-pinIDELED) 11)Chassis Intrusion Lead (4-1pin CHASSIS) 12)Wake-On-LANConnector (3-pinWOL_CON) 13)Wake-On-RingConnector (2-pinWOR) 6. SOFTWARE REFERENCE do not place jumper caps over these pins 15)USB Headers (10-1pin USB1, 10-1pin USB2) 16)SMBus Connector (5-1pin SMB) 17)ASUS IrDA / iPanel Connector (24-1pin AFPANEL) 18)ASUS iPanel Audio Connector (12-1pin AAPANEL) (on audio model only) 19)Internal Audio Connectors (4-pinCD1, AUX, MODEM) 20)Internal Microphone Connector (3-pinMIC2) Line Out 21)System Power LED Lead (3-1pin PLED) 22)Keyboard Lock Switch Lead (2-pinKEYLOCK) 24)System Message LED Lead (2-pinMLED) 25)System Management Interrupt Lead (2-pinSMI) 26)ATX Power Switch / Soft-OffSwitch Lead (2-pinPWRBTN) 28)ATX Power Supply Connector (20-pinblock ATXPWR) 29)Power Supply Thermal Sensor Connector (2-pinblock JTPWR) 3.9Starting Up the First Time Award BIOS Beep Codes 4. BIOS SETUP Powering Off your computer: Start Shut Down Shut down the computer 4.1Managing and Updating Your BIOS 4.1.1 Upon First Use of the Computer System 4.1.2 Updating BIOS Procedures Page Page 4.2BIOS Setup Program 4.2.1BIOS Menu Bar 4.2.2 Legend Bar General Help Saving Changes and Exiting the Setup Program Scroll Bar Sub-Menu 4.3Main Menu 4.3.1Primary & Secondary Master/Slave [User Type HDD] Translation Method [LBA] Cylinders Translation Method Head Sector CHS Capacity Maximum LBA Capacity Multi-SectorTransfers [Maximum] 4.3.2 Keyboard Features Language [English] A Note about Passwords Forgot the Password Halt On [All Errors] Installed Memory [XXX MB] 4.4Advanced Menu CPU Level 2 Cache ECC Check [Disabled] BIOS Update [Enabled] PS/2 Mouse Function Control [Auto] USB Legacy Support [Auto] OS/2 Onboard Memory > 64M [Disabled] Notes for JumperFree Mode 4.4.1Chip Configuration Graphics Aperture Size [64MB] Video Memory Cache Mode [UC] Memory Hole At 15M-16M[Disabled] PCI 2.1 Latency Compliant [Enabled] Delay Transaction [Disabled] 4.4.2I/O Device Configuration Onboard Parallel Port [378H/IRQ7] Parallel Port Mode ECP DMA Select Parallel Port Mode [ECP+EPP] ECP DMA Select [3] 4.4.3PCI Configuration PCI/PNP IRQ Resource Exclusion 4.5Power Menu Video Off Option [Suspend ->Off ] Video Off Method [DPMS OFF] HDD Power Down [Disabled] Suspend Mode [Disabled] PWR Button < 4 Secs [Soft Off] 4.5.1Power Up Control Power Up On PCI Card On PS2 KB/Mouse [Disabled] Automatic Power Up [Disabled] 4.5.2Hardware Monitor 4.6Boot Menu Boot Sequence Plug & Play O/S [No] Reset Configuration Data [No] Boot Virus Detection [Enabled] Quick Power On Self Test [Enabled] Boot Up Floppy Seek [Enabled] 4.7Exit Menu Exit Saving Changes Exit Discarding Changes Load Setup Defaults Discard Changes Save Changes Page 5.1Install Operating System 5.2 Start Windows 5.3A7A266 Series Motherboard Support CD 5.3.1 Installation Menu 6.1ASUS PC Probe 6.1.1 Starting ASUS PC Probe 6.1.2Using ASUS PC Probe Settings History Fan Control Information Hard Drives Memory Device Summary DMI Explorer Utility 6.1.3ASUS PC Probe Task Bar Icon 6.2CyberLink PowerPlayer SE 6.2.1 Starting CyberLink PowerPlayer SE 6.2.2 CyberLink PowerPlayer Control Panel 6.3CyberLink VideoLive Mail 6.3.1Starting VideoLive Mail 6.3.2 CyberLink VideoLive Mail User Interface 6.4ASUS Update 6.5Multi-ChannelAudio Feature Setup 6.5.1 The C-MediaAudio Mixer 6.5.2 The C-MediaAudio Demo Program 6.5.3 Connector Configuration Page 7.1 Glossary APPENDIX Boot Bus Master IDE Byte (Binary Term) COM Port LPT Port (Line Printer Port) MMX OnNow PC100 PCI Bus (Peripheral Component Interconnect Local Bus) ROM (Read Only Memory) SCSI (Small Computer System Interface) SDRAM (Synchronous DRAM) SPD for SDRAM module SSE (Streaming SIMD Extensions)