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Product warranty or service will not be extended if: (1) the product is repaired, modified or altered, unless such repair, modification of alteration is authorized in writing by ASUS; or (2) the serial number of the product is defaced or missing.
1. INTRODUCTION ................7 1.1 How This Manual Is Organized ........... 7 1.2 Item Checklist ................7 2. FEATURES ..................8 2.1 ASUS CUA266 Motherboard ............8 2.1.1 Specifications ..............8 2.1.2 Performance ..............10 2.1.3 Intelligence ............... 11 2.2 Motherboard Components ............12 2.2.1 Component Locations ............
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6.1 ASUS PC Probe ................. 81 6.1.1 Starting ASUS PC Probe ..........81 6.1.2 Using ASUS PC Probe ............. 82 6.1.3 ASUS PC Probe Task Bar Icon ........86 7. APPENDIX ..................87 7.1 Glossary ..................87 INDEX ....................91...
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. ASUS CUA266 User’s Manual...
(1) 40-pin 80-conductor ribbon cable for internal UltraDMA/66 or UltraDMA/33 IDE drives (1) Ribbon cable for two 3.5” floppy disk drives (1) ASUS Support CD with drivers and utilities (1) Bag of spare jumper caps (1) ASUS 2-port USB Connector (1) User’s Manual...
PC Health Monitoring: Provides an easy way to test and manage system status information, such as CPU and system voltages, temperatures, and fan status through the onboard hardware ASUS ASIC and the bundled ASUS PC Probe. ASUS CUA266 User’s Manual...
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• Easy Connectivity and System Information Access: Supports an optional ASUS iPanel, an easy-to-access box with system diagnostic display area, system status LEDs, USB ports, and hot keys. The AFPANEL connector on the motherboard accommodates the ASUS iPanel. ASUS CUA266 User’s Manual...
ACPI benefits, use an ACPI-supported OS such as Windows 98. • PC’99 Compliant: Both the BIOS and hardware levels of ASUS smart series motherboards are PC’99 compliant. The new PC’99 requirements for systems and components are based on the following high-level goals: Support for Plug-...
• 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 CUA266 User’s Manual...
USB Connectors (Ports 2/3/4/5) ..........14 1 PS/2 Mouse Connector ..........(Top) 24 1 PS/2 Keyboard Connector ........(Bottom) 24 Hardware Monitoring System Voltage Monitoring (integrated in ASUS ASIC) ..10 3 Fan Power and Speed Monitoring Connectors Special Features Onboard LED ................4 Wake-On-LAN Connector ............
Audio Modem Riser IDELED (AMR) NOTE: The C-Media CMI8738 audio chipset, external GAME/AUDIO connectors, and internal audio connectors are optional components, and present in audio models only. The components are grayed in the above motherboard layout. ASUS CUA266 User’s Manual...
38 Chassis Intrusion Lead (2-pin) 10) ATXPWR p. 39 ATX Power Supply Connector (20-pin) 11) SMB p. 39 SMBus Connector (5-1 pin) 12) AFPANEL p. 40 ASUS iPanel Connector (24-1 pin) 13) AUDIO_PANEL p. 40 Audio Panel Connector (10-1 pin) ASUS CUA266 User’s Manual...
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43 System Message LED Lead (2-pin) 20) SMI (PANEL) p. 43 System Management Interrupt Lead (2-pin) 21) PWR.SW (PANEL) p. 43 ATX / Soft-Off Switch Lead (2-pin) 22) RESET (PANEL) p. 43 Reset Switch Lead (2-pin) ASUS CUA266 User’s Manual...
Failure to do so may cause severe damage to the motherboard, peripherals, and/or components. (TIP: When lit, the onboard LED indicates that the system is in suspend or soft-off mode, not powered OFF. See illustration below.) CUA266 Standby Powered Power CUA266 Onboard LED ASUS CUA266 User’s Manual...
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(see 4.4 Advanced Menu). Setting Enable (JumperFree) [2-3] (default) Disable (Jumper Mode) [1-2] Jumper Mode Jumper Free (Default) CUA266 OFF ON CUA266 Jumper Mode Setting (Default) NOTE: In JumperFree™ mode, set all DIP switches (DIP_SW) to OFF. ASUS CUA266 User’s Manual...
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JP25V CUA266 +2.5V +2.6V CUA266 JP25V WARNING! Using a higher voltage may help when overclocking but may result in shortening the computer components life. It is receommended that you keep this jumper to its default setting. ASUS CUA266 User’s Manual...
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5. Plug the power cord and turn ON the computer. 6. Hold down the <Del> key during the boot process and enter BIOS setup to re-enter data. CR2032 3V Lithium Cell CMOS Power CUA266 CL_RTC Short solder points to Clear CMOS CUA266 Clear RTC RAM ASUS CUA266 User’s Manual...
For the system CPU bus to operate 200MHz/266MHz, use PC1600-/PC2100- compliant DDR DIMMs. • ASUS motherboards support Serial Presence Detect (SPD) DIMMs. This is the memory of choice for best performance vs. stability. • BIOS shows SDRAM memory on bootup screen.
104 Pins CUA266 80 Pins CUA266 184-Pin DDR DIMM Sockets A 168-pin SDR SDRAM DIMM has two notches. This feature differentiates an SDR DIMM from a DDR DIMM. The SDR DIMM notches match the breaks on the DIMM socket so the module only fits in one direction. Insert an SDR DIMM into the SDR socket as shown.
Install an auxillary fan, if necessary. CAUTION! Be careful not to scrape the motherboard when mounting/unmounting a clamp-style processor fan to avoid damaging the motherboard. Proceed to the next section for the steps on how to properly install a CPU. ASUS CUA266 User’s Manual...
Refer to the installation instructions that came with the heatsink and fan. NOTE: Do not forget to set the correct Bus Frequency and Multiple (frequency multiple setting is available only on unlocked processors) for the processor to avoid start-up problems. ASUS CUA266 User’s Manual...
4. Secure the card to the slot with the screw you removed earlier. 5. Replace the system cover. 6. Change the necessary BIOS settings, if any. (see section 4.4.3 PCI Configuration to change the settings.) 7. Install the necessary software drivers for the expansion card. ASUS CUA266 User’s Manual...
Remove the label and tab ONLY if you are 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 CUA266 User’s Manual...
You can only use primary AMRs with this motherboard. (NOTE: The motherboard package does not include the AMR card.) IMPORTANT! The AMR slot on the motherboard shares the same expansion slot with PCI Slot 5. CUA266 CUA266 Audio Modem Riser (AMR) Slot ASUS CUA266 User’s Manual...
DIN to mini DIN adapter on standard AT keyboards. PS/2 Keyboard (6-pin Female) 3) Universal Serial Bus Ports 1 & 2 (Black two 4-pin USB) Two USB ports are available for connecting USB devices. USB 1 Universal Serial Bus (USB) 2 ASUS CUA266 User’s Manual...
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COM 2 Serial Ports (9-pin Male) 6) Game/MIDI Port (Gold 15-pin GAME_AUDIO) (optional) This connector supports a joystick or a game pad for playing games, and MIDI devices for playing or editing audio files. Joystick/Midi (15-pin Female) ASUS CUA266 User’s Manual...
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NOTE: The functions of the audio connectors Line Out, Line In, and Mic change when the 6-channel audio feature is enabled. Refer to Chapter 5. SOFTWARE SETUP. Line Out Line In 1/8" Stereo Audio Connectors ASUS CUA266 User’s Manual...
(Pin 5 is removed to prevent inserting in the wrong orientation when using ribbon cables with pin 5 plugged). NOTE: Orient the red markings on the floppy ribbon cable to PIN 1 CUA266 PIN 1 CUA266 Floppy Disk Drive Connector ASUS CUA266 User’s Manual...
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For UltraDMA/100/66 IDE devices,use a 40-pin 80-conductor IDE cable. The UltraDMA/66 cable included in the motherboard package also supports UltraDMA/100. NOTE: Orient the red markings (usually zigzag) on the IDE ribbon cable to PIN 1. CUA266 PIN 1 CUA266 IDE Connectors ASUS CUA266 User’s Manual...
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4) Wake-On-LAN Connector (3-pin WOL_CON) 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.
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(NOTE: Use the “Rotation” signal only with a specially designed fan with a rotation signal. You can monitor the Rotations Per Minute (RPM) using ASUS PC Probe (see 6. SOFTWARE REFERENCE).
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LDCM. When not using the chassis intrusion lead, place a jumper cap over the pins to close the circuit. CUA266 CHASSIS CUA266 Chassis Open Alarm Lead ASUS CUA266 User’s Manual...
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-12.0Volts +3.3 Volts +3.3 Volts +3.3Volts CUA266 ATX Power Connector 11) 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 I...
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This connector allows you to connect an optional ASUS iPanel, an easy-to access drive bay with front I/O ports and status LEDs. If you are not using an ASUS iPanel, you can connect an optional wireless transmitting and receiving infrared module to the SIR connector.
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Ground Right Audio Channel MODEM CUA266 CUA266 Internal Audio Connectors 15) Internal Microphone Connector (3-pin MIC2) (optional) This connector allows you to connect chassis-mounted microphone to the motherboard instead of connecting an external microphone to the ATX connector. NOTE: The internal microphone does not work if there is an external microphone connected to the external Mic (pink) jack.
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3. HARDWARE SETUP 16) Power Supply Thermal Sensor Connector (2-pin JTPWR) If you have a power supply with thermal monitoring, connect its thermal sensor cable to this connector. JTPWR Power Supply Thermal Sensor CUA266 CUA266 Thermal Sensor Connector ASUS CUA266 User’s Manual...
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CUA266 Message LED Reset SW ATX Power Switch* CUA266 System Panel Connectors SMI Lead 17) System Power LED Lead (3-1 pin PWR.LED) This 3-1 pin connector connects to the system power LED. The LED lights up when you turn on the system power, and blinks when the system is in sleep or soft-off mode.
Windows 9X, click the Start button, click Shut Down, 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” does not appear when shutting down with ATX power supplies. ASUS CUA266 User’s Manual...
4. In DOS mode, type A:\AFLASH <Enter> to run AFLASH. IMPORTANT! If the word “unknown” appears after Flash Memory:, the memory chip is either not programmable or is not supported by the ACPI BIOS and therefore, cannot be programmed by the Flash Memory Writer utility. ASUS CUA266 User’s Manual...
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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>. ASUS CUA266 User’s Manual...
BIOS revision will solve your problems. Careless 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 boot floppy disk you created earlier.
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BIOS file you saved to the boot disk. If the Flash Memory Writer utility is not able to successfully update a complete BIOS file, the system may not boot. If this happens, call the ASUS service center for support.
POST. NOTE: Because the BIOS software is constantly being updated, the following BIOS setup screens and descriptions are for reference purposes only, and may not exactly match what you see on your screen. ASUS CUA266 User’s Manual...
Brings up a selection menu for the highlighted field <Home> or <PgUp> Moves the cursor to the first field <End> or <PgDn> Moves the cursor to the last field <F5> Resets the current screen to its Setup Defaults <F10> Saves changes and exits Setup ASUS CUA266 User’s Manual...
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 CUA266 User’s Manual...
Floppy 3 Mode Support [Disabled] This is required to support older Japanese floppy drives. The Floppy 3 Mode feature allows reading and writing of 1.2MB (as opposed to 1.44MB) on a 3.5-inch diskette. Configuration options: [Disabled] [Enabled] ASUS CUA266 User’s Manual...
CAUTION! Before attempting to configure a hard disk drive, make sure you have the configuration information supplied by the drive manufacturer. Incorrect settings may cause the system to fail to recognize the installed hard disk. ASUS CUA266 User’s Manual...
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This field configures the number of sectors per track. Refer to the drive documentation to determine the correct value to enter into this field. NOTE: To make changes to this field, set the Type field to [User Type HDD] and the Translation Method field to [Manual]. ASUS CUA266 User’s Manual...
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After making your selections on this sub-menu, press the <Esc> key to return to the Main menu. When the Main menu appears, the hard disk drive filed displays the size for the hard disk drive that you configured. ASUS CUA266 User’s Manual...
[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 characters. Configuration options: [1/4 Sec] [1/2 Sec] [3/4 Sec] [1 Sec] ASUS CUA266 User’s Manual...
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[All Errors] [No Error] [All but Keyboard] [All but Disk] [All but Disk/ Keyboard] Installed Memory [XXX MB] This field automatically displays the amount of conventional memory detected by the system during the boot process. ASUS CUA266 User’s Manual...
CPU/PCI Frequency (MHz) (when CPU Speed is set to [Manual]) This feature tells the clock generator what frequency to send to the system bus and PCI bus. The bus frequency (external frequency) multiplied by the bus multiple equals the CPU speed. ASUS CUA266 User’s Manual...
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This field functions as an update loader integrated into the BIOS to supply the processor with the required data. When set to [Enabled], the BIOS loads the update on all processors during system bootup. Configuration options: [Disabled] [Enabled] ASUS CUA266 User’s Manual...
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If the system crashes or hangs due to improper frequency settings, power OFF the system and restart. The system starts up in safe mode running at a bus speed of 66MHz and enters the BIOS Setup. ASUS CUA266 User’s Manual...
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4. BIOS SETUP For processors with locked frequency multiplier For processors with unlocked frequency multiplier ASUS CUA266 User’s Manual...
SDRAM Configuration to [User Defined]. SDRAM RAS Precharge Time [3T] This controls the idle clocks after issuing a precharge command to the SDRAM. NOTE: This field appears only when you set the SDRAM Configuration to [User Defined]. ASUS CUA266 User’s Manual...
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When set to [Enabled], this feature frees the PCI bus when the CPU is accessing 8-bit ISA cards. This process normally consumes about 50-60 PCI Clocks without PCI delayed transaction. Set this field to [Disabled] when using ISA cards that are not PCI 2.1 compliant. Configuration options: [Enabled] [Disabled] ASUS CUA266 User’s Manual...
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IDE channel, or both. You can also set both channels to [Disabled]. Configuration options: [Both] [Primary] [Secondary] [Disabled] Onboard PCI Audio [Enabled] This field allows you to enable or disable the onboard PCI audio controller. Configuration options: [Enabled] [Auto Detect] [Disabled] ASUS CUA266 User’s Manual...
If the system already has a second serial port connected to the onboard COM2 connector, it will no longer work if you enable the infrared feature. See IrDA-Compliant Infrared Module Connector in 3.8 Connectors. Configuration options: [Disabled] [Enabled] ASUS CUA266 User’s Manual...
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If a modem is detected, the onboard modem controller is enabled; if no modem is detected, the controller is disabled. If there are conflicts with the onboard modem controller, set the appropriate field to [Disabled]. Configuration options: [Disabled] [Auto] ASUS CUA266 User’s Manual...
The setting [Disabled] disables the onboard SYMBIOS SCSI BIOS so that the BIOS on an add-on SYMBIOS SCSI card can be used. If the SYMBIOS SCSI card does not have a BIOS, the Symbios SCSI card will not work. Configuration options: [Auto] [Disabled] ASUS CUA266 User’s Manual...
IRQ is NOT required by a legacy ISA card. Set the IRQ field to [Yes] if you install a legacy ISA card that requires a unique IRQ and you are NOT using ICU. Configuration options: [No/ICU] [Yes] ASUS CUA266 User’s Manual...
Windows 95, you need to install Windows with the APM feature. In Windows 98 or later, APM is automatically installed as indicated by a battery and power cord icon labeled “Power Management” in the “Control Panel.” Select the item “Advanced” in the Power Management Properties dialog box. ASUS CUA266 User’s Manual...
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4 seconds will place the system in sleep mode. Regardless of the setting, holding the ATX switch for more than 4 seconds will power off the system. Configuration options: [Soft off] [Suspend] ASUS CUA266 User’s Manual...
PCI modem by sending a wake-up frame or signal. Configuration options: [Disabled] [Enabled] IMPORTANT: This feature requires a network interface with Wake-On-LAN and an ATX power supply with at least 720mA +5V standby power. ASUS CUA266 User’s Manual...
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This allows an unattended or automatic system power up. You may configure your system to power up at a certain time of the day by selecting [Everyday] or at a certain time and day by selecting [By Date]. Configuration options: [Disabled] [Everyday] [By Date] ASUS CUA266 User’s Manual...
NOTE: If any of the monitored items is out of range, the following error message appears: “Hardware Monitor found an error. Enter Power setup menu for details”. You will then be prompted to “Press F1 to continue or DEL to enter SETUP”. ASUS CUA266 User’s Manual...
This field allows you to select which ATAPI CD-ROM drive to use in the boot sequence. Pressing [Enter] will show the product IDs of all your connected ATAPI CD-ROM drives. Other Boot Device Select [INT18 Device (Network)] Configuration options: [Disabled] [SCSI Boot Device] [INT18 Device (Network)] ASUS CUA266 User’s Manual...
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Configuration options: [Disabled] [Enabled] Boot Up Floppy Seek [Enabled] When enabled, the BIOS will seek the floppy disk drive to determine whether the drive has 40 or 80 tracks. Configuration options: [Disabled] [Enabled] ASUS CUA266 User’s Manual...
Select this option only if you do not want to save the changes that you made to the Setup program. If you made changes to fields other than system date, system time, and password, the BIOS asks for a confirmation before exiting. ASUS CUA266 User’s Manual...
This option saves your selections without exiting the Setup program. You can then return to other menus and make further changes. After you select this option, a confirmation window appears. Select [Yes] to save any changes to the non-volatile RAM. ASUS CUA266 User’s Manual...
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4. BIOS SETUP (This page was intentionally left blank.) ASUS CUA266 User’s Manual...
When prompted to restart, select No and then follow the normal setup procedures on the screen. 5.2 CUA266 Motherboard Support CD To begin using the support CD, insert it into the CD-ROM drive. The support installation menu should appear.
ASUS Update V3.27.07: Installs the ASUS Update program. This program allows you download the latest version of Flash BIOS from the ASUS website. Before using ASUS Update, make sure that you have a network card and a TCP/IP network driver.
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PowerPlayer SE 5.0, Cyberlink PowerDVD Trial 2.55, and Cyberlink VideoLive Mail 3.10. • ASUS Screen Saver: Installs the ASUS screen saver. • Show Motherboard Information: Allows you to view information about the motherboard, such as product name, BIOS version, and CPU.
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5. SOFTWARE SETUP (This page was intentionally left blank.) ASUS CUA266 User’s Manual...
DMI Explorer. 6.1.1 Starting ASUS PC Probe When ASUS PC Probe starts, a splash screen appears allowing you to select whether to show the screen again when you open PC Probe or not. To bypass this startup screen, clear the Show up in next execution check box.
6. SOFTWARE REFERENCE 6.1.2 Using ASUS PC Probe Monitoring Monitor Summary Shows a summary of the items being monitored. Temperature Monitor Shows the PC temperature (for supported processors only). Temperature Warning threshold adjustment (Move the slider up to increase the...
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PC for future reference. Fan Control Lets you enable/disable Smart Fan Control. Smart Fan Control adjusts the fan speed automatically based on the current CPU temperature and predefined threshold. ASUS CUV266 User’s Manual...
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PC’s hard disk drives and the file allocation table or file system used. Memory Shows the PC memory load, memory usage, and paging file usage. Device Summary Shows a summary of devices present in your PC. ASUS CUV266 User’s Manual...
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PC, such as CPU type, CPU speed, and internal/external frequencies, and memory size. Utility Lets you run programs outside of the ASUS Probe modules. To run a program, click Execute Program. NOTE: This feature is currently unavailable. ASUS CUV266 User’s Manual...
6. SOFTWARE REFERENCE 6.1.3 ASUS PC Probe Task Bar Icon Right clicking the PC Probe icon brings up a menu to open or exit ASUS PC Probe and pause or resume all system monitoring. When the ASUS PC Probe senses a problem with your...
BIOS file into the EEPROM. Bit (Binary Digit) Represents the smallest unit of data used by the computer. A bit can have one of two values: 0 or 1. ASUS CUA266 User’s Manual...
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IDE devices integrate the drive control circuitry directly on the drive itself, elimi- nating the need for a separate adapter card (in the case for SCSI devices). UltraDMA/ 33 IDE devices can achieve up to 33MB/Sec transfer. ASUS CUA266 User’s Manual...
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Developed by Rambus, Inc., this type of memory can deliver up to 1.6GB of data per second. RDRAM is the first interface standard that can be directly implemented on high performance VLSI components such as, CMOS DRAMs, memory control- lers, and graphics/video ICs. ASUS CUA266 User’s Manual...
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USB 2.0 provides twice the transfer rate compared to USB 1.0 and competes with the 1394 standard. Wake-On-LAN The computer automatically wakes up upon receiving a wake-up packet through a Network interface when it is under power soft-off, suspend or sleep mode. ASUS CUA266 User’s Manual...
External Frequency 19 Expansion Slots 9 Installation 24 Level 1/Level 2 Cache 57 Serial Number 57 Floppy 3 Mode 50 Speed 56 Floppy Disk Drive Connector 32, 39 Upgrade/Reinstallation 58 ZIF Socket 23 Chassis Intrusion 36 ASUS CUA266 User’s Manual...
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PCI/VGA Palette Snoop 65 PIO Mode 53 Keyboard Plug & Play O/S 73 Auto-Repeat Delay 54 Ports. See Connectors Auto-Repeat Rate 54 Power Management 67 Connector 29 Power On Self Test 73 Features 54 Processor 8 ASUS CUA266 User’s Manual...
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Applications 78 Installation Menu 77 ZIF Socket 23 System Chipset 8 System Date 50 System Hangup 58 System Memory DIMMs 21 Installation 22 SDRAM 21 System Start Up 42 System Time 50 Thermal Sensor Connector 36, 41 ASUS CUA266 User’s Manual...
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INDEX (This page was intentionally left blank.) ASUS CUA266 User’s Manual...