Pentium II Motherboard

USERS MANUAL

USER'S NOTICE

No part of this manual, including the products and softwares described in it, may be reproduced, transmitted, transcribed, stored in a retrieval system, or translated into any language in any form or by any means, except documentation kept by the purchaser for backup purposes, without the express written permission of ASUSTeK COMPUTER INC. (ASUS). ASUS PROVIDES THIS MANUAL AS IS WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OR CONDITIONS OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL ASUS, ITS DIRECTORS, OFFICERS, EMPLOYEES OR AGENTS BE LIABLE FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES (INCLUDING DAMAGES FOR LOSS OF PROFITS, LOSS OF BUSINESS, LOSS OF USE OR DATA, INTERRUPTION OF BUSINESS AND THE LIKE), EVEN IF ASUS HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES ARISING FROM ANY DEFECT OR ERROR IN THIS MANUAL OR PRODUCT. Products and corporate names appearing in this manual may or may not be registered trademarks or copyrights of their respective companies, and are used only for identification or explanation and to the owners benefit, without intent to infringe. Intel, LANDesk, and Pentium are registered trademarks of Intel Corporation. IBM and OS/2 are registered trademarks of International Business Machines. Symbios is a registered trademark of Symbios Logic Corporation. Windows and MS-DOS are registered trademarks of Microsoft Corporation. Sound Blaster AWE32 and SB16 are trademarks of Creative Technology Ltd. Adobe and Acrobat are registered trademarks of Adobe Systems Incorporated. The product name and revision number are both printed on the board itself. Manual revisions are released for each board design represented by the digit before and after the period of the manual revision number. Manual updates are represented by the third digit in the manual revision number. For previous or updated manuals, BIOS, drivers, or product release information, contact ASUS at http://www.asus.com.tw or through any of the means indicated on the following page. SPECIFICATIONS AND INFORMATION CONTAINED IN THIS MANUAL ARE FURNISHED FOR INFORMATIONAL USE ONLY, AND ARE SUBJECT TO CHANGE AT ANY TIME WITHOUT NOTICE, AND SHOULD NOT BE CONSTRUED AS A COMMITMENT BY ASUS. ASUS ASSUMES NO RESPONSIBLITY OR LIABILITY FOR ANY ERRORS OR INACCURACIES THAT MAY APPEAR IN THIS MANUAL, INCLUDING THE PRODUCTS AND SOFTWARES DESCRIBED IN IT.
Copyright 1997 ASUSTeK COMPUTER INC. All Rights Reserved.
Product Name: ASUS P2L97 Manual Revision: 1.05 Release Date: September 1997

ASUS P2L97 Users Manual

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CONTENTS

I. INTRODUCTION 7 How this Manual is Organized... 7 Item Checklist... 7 II. FEATURES 8 Features of the ASUS P2L97 Motherboard.. 8 The ASUS P2L97 Motherboard.. 9 III. INSTALLATION 10 Layout of the ASUS P2L97 Motherboard.. 10 Installation Steps... 12 1. Jumpers.... 12 Jumper Settings... 13 2. System Memory (DIMM).. 17 DIMM Memory Installation Procedures:.. 18 3. Central Processing Unit (CPU).. 19 Pentium II Processor.. 19 AAVID Heatsink.. 23 Elan Vital Heatsink... 23 4. Expansion Cards... 24 Expansion Card Installation Procedure.. 24 Assigning IRQs for Expansion Cards. 24 Assigning DMA Channels for ISA Cards.. 25 ISA Cards and Hardware Monitor... 25 5. External Connectors... 26 Power Connection Procedures.. 33 IV. BIOS SOFTWARE 34 Support Software... 34 Flash Memory Writer Utility.. 34 Main Menu... 35 Advanced Features Menu.. 35 Managing and Updating Your Motherboards BIOS. 36 6. BIOS Setup.... 37 Load Defaults.. 38
Standard CMOS Setup... 38 Details of Standard CMOS Setup:... 38 BIOS Features Setup.. 41 Details of BIOS Features Setup.. 41 Chipset Features Setup... 44 Details of Chipset Features Setup.. 44 Power Management Setup... 47 Details of Power Management Setup. 47 PNP and PCI Setup... 50 Details of PNP and PCI Setup.. 50 Load BIOS Defaults... 52 Load Setup Defaults... 52 Supervisor Password and User Password.. 53 IDE HDD Auto Detection... 54 Save & Exit Setup... 55 Exit Without Saving... 55 V. DESKTOP MANAGEMENT 56 Desktop Management Interface (DMI).. 56 Introducing the ASUS DMI Configuration Utility. 56 System Requirements.. 56 Using the ASUS DMI Configuration Utility.. 57 VI. ASUS PCI SCSI Cards 59 Symbios SCSI BIOS and Drivers... 59 ASUS PCI-SC200 & PCI-SC860 SCSI Cards.. 59 Setting Up the ASUS PCI-SC200 & PCI-SC860. 60 Setting the INT Assignment for the ASUS PCI-SC200. 60 Terminator Requirements for SCSI Devices. 60 Terminator Settings for the ASUS PCI-SC860.. 61 Terminator Settings for the ASUS PCI-SC200.. 61 SCSI ID Numbers for SCSI Devices.. 62 SCSI ID Priority... 62

How this Manual is Organized

Item Checklist

Check that your package is complete. If you discover damaged or missing items, contact your retailer. ASUS P2L97 motherboard Retention mechanism & heatsink support 1 IDE ribbon cable 1 floppy ribbon cable ASUS P2L97 Support Drivers & Utilities Flash Memory Writer utility to update the FLASH BIOS Desktop Management Interface (DMI) utility LANDesk Client Manager (LDCM) Software (with optional onboard LM78) Readme files for descriptions and use of the files Technical Support Form This users manual Infrared module (optional) ASUS PCI-SC200 Fast-SCSI or PCI-SC860 Ultra-Fast SCSI card (optional)

II. FEATURES

Features of the ASUS P2L97 Motherboard
The ASUS P2L97 is carefully designed for the demanding PC user who wants many features processed by the fastest CPU. This motherboard: Versatile Processor Support: Intel Pentium II (233MHz333MHz) processor. Intel Chipset: Features Intels 440LX AGPset with I/O subsystems. Easy Installation: Is equipped with BIOS that supports auto detection of hard drives, PS/2 mouse, and Plug and Play devices to make setup of hard drives, expansion cards, and other devices virtually automatic. ISA & PCI Expansion Slots: Provides one 16-bit ISA, four 32-bit PCI slots, and one ISA/PCI shared slot. Super Multi-I/O: Provides two high-speed UART compatible serial ports and one parallel port with EPP and ECP capabilities. UART2 can also be directed from COM2 to the Infrared Module for wireless connections. Desktop Management Interface (DMI): Supports DMI through BIOS, which allows hardware to communicate within a standard protocol creating a higher level of compatibility. (Requires DMI-enabled components.) (See section V) PCI Bus Master IDE Controller: Comes with an onboard PCI Bus Master IDE controller with two connectors that supports four IDE devices in two channels, supports PIO Modes 3 and 4 and Bus Master IDE DMA Mode 2, and supports Enhanced IDE devices such as Tape Backup and CD-ROM drives. Two floppy drives of either 5.25inch or 3.5inch (1.44MB or 2.88MB) are also supported without an external card. Supports Japanese standard Floppy 3 mode (3.5-inch disk drive: 1.2MB) and LS-120 floppy disk drives (3.5-inch disk drive: 120 MB, 1.44MB, 720K). BIOS supports IDE CD-ROM or SCSI device boot-up. CPU Built-In Level 2 Cache: 512KB or 256KB Pipelined Burst Level 2 cache in the Pentium II Single Edge Contact (SEC) cartridge. Versatile Memory Support: Is equipped with three DIMM sockets to support (8, 16, 32, 64, or 128MB) 168-pin SDRAM/EDO memory modules up to 384MB. SCSI BIOS: Supports optional ASUS SCSI controller cards through onboard SYMBIOS firmware. IrDA: Supports an optional infrared port module for wireless interface. Concurrent PCI: Concurrent PCI allows multiple PCI transfers from PCI master busses to memory to CPU. AGP: Supports Accelerated Graphics Port cards for high performance, component level interconnect targeted at 3D graphical display applications. Intelligence: Supports Fan Status Monitoring and Alarm, Temperature Monitoring and Alert, Voltage Monitoring and Alert, System Resources Alert, and Virus Write Protection through the optional onboard LM78 Hardware Monitor and Intel LANDesk Client Manager (LDCM) software.

168-Pin DIMM Notch Key Definitions (3.3V)
DRAM Key Position Unbuffered RFU Buffered
Voltage Key Position 5.0V 3.3V Reserved
The notch on the DIMM module will shift between left, center, or right to identify the type and also to prevent the wrong type to be inserted into the DIMM slot on the motherboard. You must ask your retailer for the specifications before purchasing. Four clock signals are supported on this motherboard.
3. Central Processing Unit (CPU)
This motherboard provides a Single Edge Contact (SEC) slot for a Pentium II processor packaged in an SEC cartridge.

Pentium II Processor

WARNING! Be sure that sufficient air circulation is available across the processors passive heatsink. Without sufficient circulation, the processor could overheat and damage both the processor and the motherboard. You may install an auxiliary fan, if necessary. You should check to see that you have the following 9 items. (NOTE: The pictures in the following pages will have the same item numbers next to them for your reference. The design and color of your items may be slightly different.)

Lock Holes

Captive Nut
Attach Mount Bridges (Items 1,2) (Factory Installed)
Pentium II Retention Mechanism (Item 3)
(8) Top Bar (4) (5) Pin Posts Base (7) (6) Larger Fin should be on the bottom.
Heatsink Support Base/Top Bar (Items 4-7)
Heatsink bottom Groove for the Support Top Bar Pentium II Processor Heatsink (Item 8)

CPU (Item 9)

III. INSTALLATION (CPU)
The Motherboard As Shipped Four screws should be showing next to each corner of the SEC CPU Slot using two attach mount bridges from the underside of the motherboard.

SEC CPU slot

NOTE: Encircled items are screws from the mount bridges (1 & 2)
III. INSTALLATION (CPU) 20
Installing the Pentium II Processor: 1. Mount the Pentium II Retention Mechanism: The retention mechanism is designed to fit into the SEC slot only one way. TIP: Orient the mechanisms lock holes toward the motherboards chipsets (see motherboard layout for the location of the Intel chipset). Be sure to align the notch in the mechanism with the small rib on one side of the slot and that the mechanism is properly seated on the board. Then, screw the captive nuts in place. WARNING! Do not overtighten the captive nuts. Doing so could damage your motherboard. Tighten captive nuts to no more than 61 inch/pound.

Lock holes

Captive nut
2. Mount the Heatsink: Place the SEC cartridge face down on a flat surface and lay the heat sink flush on the back (metal side) of the SEC cartridge. Check the orientation of the heatsink against the pictures. The thicker fin must be orientated toward the bottom. The top clamp is wider than the bottom clamp so only this orientation will fit. With a screw driver, push the clamps one at a time into the SEC cartridge. Be sure that the heatsink is firmly pressed against the SEC cartridge. When correctly installed, no light must be showing through between the thermal pad of the heatsink and the SEC cartridge. WARNING! If the heatsink is not mounted tightly against the SEC cartridge, the CPU will overheat. You may install an auxiliary fan to provide adequate circulation across the processors passive heatsink.

Expansion Card Installation Procedure
1. 2. 3. 4. 5. 6. 7. 8. 9. Read the documentation for your expansion card. Set any necessary jumpers on your expansion card. Remove your computer systems cover. Remove the bracket on the slot you intend to use. Keep the bracket for possible future use. Carefully align the cards connectors and press firmly. Secure the card on the slot with the screw you removed in step 4. Replace the computer systems cover. Set up the BIOS if necessary (such as IRQ xx Used By ISA: Yes in PNP AND PCI SETUP) Install the necessary software drivers for your expansion card.
III. INSTALLATION (Expansion Cards) 24
Assigning IRQs for Expansion Cards
Some expansion cards need to use an IRQ to operate. Generally an IRQ must be exclusively 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. Both ISA and PCI expansion cards may require to use IRQs. System IRQs are available to cards installed in the ISA expansion bus first, then any remaining IRQs are available to PCI cards. Currently, there are two types of ISA cards. The original ISA expansion card design, now referred to as legacy ISA cards, requires that you configure the cards jumpers manually and then install it in any available slot on the ISA bus. You may use Microsoft Diagnostics (MSD.EXE) utility located in the Windows directory to see a map of your used and free IRQs. If you use Windows 95, the Resources tab under Device Manager displays the resource settings being used by a particular device (to gain access, double-click the System icon under the Control Panel program). Ensure that no two devices share the same IRQs or your computer will experience problems when those two devices are in use at the same time.
To simplify this process, this motherboard complies with the Plug and Play (PnP) specification, which was developed to allow automatic system configuration whenever a PnP-compliant card is added to the system. For PnP cards, IRQs are assigned automatically from those available. If the system has both legacy and PnP ISA cards installed, IRQs are assigned to PnP cards from those not used by legacy cards. The PCI and PNP configuration section of the BIOS setup utility can be used to assign which IRQs are being used by legacy cards. For older legacy cards that do not work with the BIOS, you may contact your vendor for an ISA Configuration Utility. An IRQ number is automatically assigned to PCI expansion cards after those used by legacy and PnP ISA cards. In the PCI bus design, the BIOS automatically assigns an IRQ to a PCI slot that contains a card requiring an IRQ. To install a PCI card, you need to set the INT (interrupt) assignment. Since all the PCI slots on this motherboard use an INTA #, set the jumpers on your PCI cards to INT A.

NOTE: Orient the red stripe to Pin 1
Floppy Drive Connector Pin 1
Floppy Disk Drive Connector
III. INSTALLATION (DMA Channels) (Connectors)
4. Serial Port COM1 and COM2 Connectors (Two 9-pin Male) The two serial ports can be used for pointing devices or other serial devices. See Onboard Serial Port in Chipset Features Setup of the BIOS SOFTWARE.
6. Universal Serial BUS Ports 1 & 2 (Two 4-pin Female) Two USB ports are available for connecting USB devices.
Univeral Serial Bus (USB) 2
7. Primary / Secondary IDE connectors (Two 40-1pin IDE) These connectors support the provided IDE hard disk ribbon cable. After connecting the single end to the board, connect the two plugs at the other end to your hard disk(s). If you install two hard disks, you must configure the second drive to Slave mode by setting its jumper accordingly. Please refer to the documentation of your hard disk for the jumper settings. BIOS now supports SCSI device or IDE CD-ROM bootup (see HDD Sequence SCSI/IDE First & Boot Sequence in the BIOS Features Setup of the BIOS SOFTWARE) (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 using one ribbon cable on the primary IDE connector and another ribbon cable on 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 BIOS Features Setup.
NOTE: Orient the red stripe to Pin 1 Pin 1
III. INSTALLATION (Connectors) 28

Secondary IDE Connector

E Connectors

Primary IDE Connector

8. IDE activity LED (2-pin IDE_LED) This connector supplies power to the cabinets IDE activity LED. Read and write activity by devices connected to the Primary or Secondary IDE connectors will cause the LED to light up.

IDE_LED

IDE Activity LED
NOTE: The Rotation signal is to be used only by a specially designed fan with rotation signal. 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.
Chassis Fan Power CPU Fan Power Power Supply Fan

IV. BIOS (Updating BIOS) 36

6. BIOS Setup

The motherboard supports two programmable Flash ROM chips: 5 Volt and 12 Volt. Either of these memory chips can be updated when BIOS upgrades are released. Use the Flash Memory Writer utility to download the new BIOS file into the ROM chip as described in detail in this section. All computer motherboards provide a Setup utility program for specifying the system configuration and settings. If your motherboard came in a computer system, the proper configuration entries may have already been made. If so, invoke the Setup utility, as described later, and take note of the configuration settings for future reference; in particular, the hard disk specifications. If you are installing the motherboard, reconfiguring your system or you receive a Run Setup message, you will need to enter new setup information. This section describes how to configure your system using this utility. The BIOS ROM of the system stores the Setup utility. When you turn on 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 pressing the mentioned key(s), POST will continue with its test routines, thus preventing you from calling up Setup. If you still need to call Setup, reset the system by pressing <Ctrl> + <Alt> + <Delete>, or by pressing the Reset button on the system case. You can also restart by turning the system off and then back on again. But do so only if the first two methods fail. When you invoke Setup, the CMOS SETUP UTILITY main program screen will appear with the following options:

IV. BIOS (BIOS Setup)

Load Defaults
The Load BIOS Defaults option loads the minimum settings for troubleshooting. Load Setup Defaults, on the other hand, is for loading optimized defaults for regular use. Choosing defaults at this level, will modify all applicable settings. A section at the bottom of the above screen displays the control keys for this screen. Take note of these keys and their respective uses. Another section just below the control keys section displays information on the currently highlighted item in the list.

Standard CMOS Setup

This Standard CMOS Setup option allows you to record some basic system hardware configuration and set the system clock and error handling. If the motherboard is already installed in a working system, you will not need to select this option anymore. However, if the configuration stored in the CMOS memory on the board gets lost or damaged, or if you change your system hardware configuration, you will need to respecify the configuration values. The configuration values usually get lost or corrupted when the power of the onboard CMOS battery weakens.

IV. BIOS (Standard CMOS) 38
The precedong screen provides you with a list of options. At the bottom of this screen are the control keys for this screen. Take note of these keys and their respective uses. User-configurable fields appear in a different color. If you need information on the selected field, press <F1>. The help menu will then appear to provide you with the information you need. The memory display at the lower right-hand side of the screen is read-only and automatically adjusts accordingly.
Details of Standard CMOS Setup:
Date To set the date, highlight the Date field and then press either <Page Up>/<Page Down> or <+>/<> to set the current date. Follow the month, day and year format. Valid values for month, day and year are: Month: (1 to 12), Day: (1 to 31), Year: (up to 2079)
Time To set the time, highlight the Time field and then press either <Page Up>/<Page Down> or <+>/<> to set the current time. Follow the hour, minute and second format. Valid values for hour, minute and second are: (Hour: (00 to 23), Minute: (00 to 59), Second: (00 to 59). Press <Enter> twice if you do not want to modify the current time. NOTE: You can bypass the date and time prompts by creating an AUTOEXEC.BAT file. For information on how to create this file, please refer to the MS-DOS manual.
Hard Disks This field records the specifications for all non-SCSI hard disk drives installed in your system. The onboard PCI IDE connectors provide Primary and Secondary channels for connecting up to four IDE hard disks or other IDE devices. Each channel can support up to two hard disks; the first of which is the master and the second is the slave. Specifications for SCSI hard disks need not to be entered here since they operate using device drivers and are not supported by any the BIOS. If you install either the optional PCI-SC200 or PCI-SC860 SCSI controller card into the motherboard, see section VI for instructions. If you install other vendors SCSI controller card, refer to their respective documentations on how to install the required SCSI drivers. IV. BIOS (Standard CMOS) 39 For IDE hard disk drive setup, you can: Use the Auto setting for detection during bootup. Use the IDE HDD AUTO DETECTION in the main menu to automatically enter the drive specifications. Enter the specifications yourself manually by using the User option. The entries for specifying the hard disk type include CYLS (number of cylinders), HEAD (number of read/write heads), PRECOMP (write precompensation), LANDZ (landing zone), SECTOR (number of sectors) and MODE. The SIZE field automatically adjusts according to the configuration you specify. The documentation that comes with your hard disk should provide you with the information regarding the drive specifications. The MODE entry is for IDE hard disks only, and can be ignored for MFM and ESDI drives. This entry provides three options: Normal, Large, LBA, or Auto (see below). Set MODE to the Normal for IDE hard disk drives smaller than 528MB; set it to LBA for drives over 528MB that support Logical Block Addressing (LBA) to allow larger IDE hard disks; set it to Large for drives over 528MB that do not support LBA. Large type of drive can only be used with MS-DOS and is very uncommon. Most IDE drives over 528MB support the LBA mode.

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 CPUs Level 1 and Level 2 built-in cache. BIOS Update (Enabled) This functions as an update loader integrated into the BIOS to supply the processor with the required data. The BIOS will load the update on all processors during system bootup in the default position of Enabled. CPU Fast String (Enabled) Leave on default setting of Enabled for best performance. Quick Power On Self Test (Enabled) This field speeds up the Power-On Self Test (POST) routine by skipping retesting a second, third, and forth time. Setup default setting for this field is Enabled. A complete test of the system is done on each test. HDD Sequence SCSI/IDE First (IDE) When using both SCSI and IDE hard disk drives, IDE is always the boot disk using drive letter C (default setting of IDE). This new feature allows a SCSI hard disk drive to be the boot disk when set to SCSI. This allows multiple operating systems to be used on both IDE and SCSI drives or the primary operating system to boot using a SCSI hard disk drive. Boot Sequence (C,A) This field determines where the system looks first for an operating system. Options are C,A; A,CDROM,C; CDROM,C,A; D,A; E,A; F,A; C only; LS/ZIP, C; and A,C. The setup default setting is to check first the hard disk and then the floppy disk drive, that is, C, A. Boot Up Floppy Seek (Disabled) When enabled, the BIOS will seek drive A once. Floppy Disk Access Control (R/W) This allows protection of files from the computer system to be copied to floppy disks by allowing the setting of Read Only to only allow reads from the floppy disk drive but not writes. The setup default R/W allows both reads and writes. IDE HDD Block Mode Sectors (HDD MAX) This field enhances hard disk performance by making multi-sector transfers instead of one sector per transfer. Most IDE drives, except older versions, can utilize this feature. Selections are HDD MAX, Disabled, 2, 4, 8, 16, and 32. IV. BIOS (BIOS Features) 42
Security Option (System) When you specify a Supervisor Password and/or User Password (explained later in this section), the Security Option field determines when the system prompts for the password. The default setting is System, where the system prompts for the User Password every time you start your system. The other option is Setup, where the system goes through its startup routine unless the Setup utility is called, when the system prompts for the Supervisor Password. PS/2 Mouse Function Control (Auto) The default of Auto allows the system to detect a PS/2 mouse on bootup. If detected, IRQ12 will be used for the PS/2 mouse. IRQ12 will be reserved for expansion cards if a PS/2 mouse is not detected. Enabled will always reserve IRQ12, whether on bootup a PS/2 mouse is detected or not. PCI/VGA Palette Snoop (Disabled) Some display cards that are nonstandard VGA such as graphics accelerators or MPEG Video Cards may not show colors properly. The setting Enabled should correct this problem. Otherwise leave this on the setup default setting of Disabled. 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.... Video ROM BIOS Shadow (Enabled) This field allows you to change the video BIOS location from ROM to RAM. Relocating to RAM enhances system performance, as information access is faster than the ROM. C8000-CBFFF to DC000-DFFFF (Disabled) These fields are used for shadowing other expansion card ROMs. If you install other expansion cards with ROMs on them, you will need to know which addresses the ROMs use to shadow them specifically. Shadowing a ROM reduces the memory available between 640K and 1024K by the amount used for this purpose. Boot Up NumLock Status (On) This field enables users to activate the Number Lock function upon system boot. Typematic Rate Setting (Disabled) When enabled, you can set the two typematic controls listed next. Setup default setting is Disabled. Typematic Rate (Chars/Sec) (6) This field controls the speed at which the system registers repeated keystrokes. Options range from 6 to 30 characters per second. Setup default setting is 6; other settings are 8, 10, 12, 15, 20, 24, and 30. Typematic Delay (Msec) (250) This field sets the time interval for displaying the first and second characters. Four delay rate options are available: 250, 500, 750, and 1000.

IV. BIOS (BIOS Features)

Chipset Features Setup
This Chipset Features Setup option controls the configuration of the boards chipset. Control keys for this screen are the same as for the previous screen.
NOTE: SETUP Defaults are noted in parenthesis next to each function heading.
Details of Chipset Features Setup
EDO Auto Configuration (60ns DRAM) The default setting of 60ns DRAM sets the optimal timings for items 2 through 5 for 60ns DRAM modules. If you are using 70ns DRAM modules, you must change this item to 70ns DRAM. See section III for DRAM installation information. IV. BIOS (Chipset Features) 44 SDRAM Configuration (12ns SDRAM) Leave on default setting. SDRAM RAS to CAS Delay (Auto) Leave on default setting. SDRAM RAS Precharge Time (Auto) Leave on default setting. MA Wait State (Auto) Leave on default setting. 16-bit I/O Recovery Time (1 BUSCLK) Timing for 16-bit ISA cards. Leave on default setting. 8-bit I/O Recovery Time (1 BUSCLK) Timing for 8-bit ISA cards. Leave on default setting. Graphics Aperture Size (64MB) Memory-mapped, graphics data structures can reside in a Graphics Aperture. Leave on default setting.
Video Memory Cache Mode (UC) USWC (uncacheable, speculative write combining) is a new cache technology for the video memory of the processor. It can greatly improve the display speed by caching the display data. You must leave this on the default setting of UC (uncacheable) if your display card cannot support this feature or else your system may not boot. PCI 2.1 Support (Enabled) This function allows you to Enable or Disable PCI 2.1 features. Leave on Enabled setting for PCI 2.1 compliancy. Memory Hole At 15M16M (Disabled) Enabling this feature reserves 15MB to 16MB memory address space to ISA expansion cards that specifically require this setting. This makes the memory from 15MB and up unavailable to the system. Expansion cards can only access memory up to 16MB. The default is Disabled. DRAM are xx bits wide If all your DRAM modules have parity chips (e.g., 8 chips + 4 parity chips), they are considered 36bits. This motherboard sums the memory per bank and therefore two modules will give 72bits and the following will be displayed:
If your DRAM modules do not have parity chips (e.g. 8 chips), they are considered 32bits and the following will be displayed instead:
Data Integrity Mode (Non-ECC) Non-ECC has byte-wise write capability but no provision for protecting data integrity in the DRAM array. EC-Only data errors are detected but not corrected. ECC allows a detection of single-bit and multiple-bit errors and recovery of single-bit errors. (See section III for more information on DRAM memory modules.).... Onboard FDC Controller (Enabled) When Enabled, this field allows you to connect your floppy disk drives to the onboard floppy disk drive connector instead of a separate controller card. If you want to use a different controller card to connect the floppy disk drives, set this field to Disabled.

Using the ASUS DMI Configuration Utility

Edit DMI (or delete)

Use the (left-right) cursors to move the top menu items and the (up-down) cursor to move between the left hand menu items. The bottom of the screen will show the available keys for each screen. Press enter at the menu item to enter the right hand screen for editing. Edit component appears on top. The reversed color field is the current cursor position and the blue text are available for editing. The orange text shows auto-detected information and are not available for editing. The blue text Press [ENTER] for detail contains a second pop-up menu is available, use the + - (plus-minus) keys to change the settings. Enter to exit and save, ESC to exit and not save. If the user has made changes, ESC will prompt you to answer Y or N. Enter Y to go back to the left-hand screen and save, enter N to go back to left-hand screen and not save. If editing has not been made, ESC will send you back to the left hand menu without any messages.
A heading, *** BIOS Auto Detect *** appears on the right for each menu item on the left side that has been auto detected by the system BIOS. A heading, *** User Modified been modified by the user.
*** will appear on the right for menu items that has
V. DMI (Using DMI Utility)

Save MIFD

You can save the MIFD (normally only saved to flash ROM) to a file by entering the drive and path here. If you want to cancel save, you may press ESC and a message Bad File Name appears here to show it was not saved. Load MIFD
You can load the disk file to memory by entering a drive and path and file name here. Load BIOS Defaults V. DMI (Using DMI Utility) You can load the BIOS defaults from a MIFD file and can clear all user modified and added data. You must reboot your computer in order for the defaults to be saved back into the Flash BIOS. 58 ASUS P2L97 Users Manual

VI. ASUS PCI SCSI Cards

Aside from the system BIOS, the Flash memory chip on the motherboard also contains the Symbios SCSI BIOS. This Symbios SCSI BIOS works in conjunction with the optional ASUS PCI-SC200 controller card to provide Fast SCSI-2 interface when using compatible SCSI devices or the ASUS PCI-SC860 SCSI controller cards to provide Ultra-Fast SCSI-2 interface when using Ultra-Fast SCSI-2 devices. All SCSI devices you install on your system require driver software to function. The Symbios SCSI BIOS directly supports SCSI hard disks under the DOS, Windows and OS/2 environments. It also uses device drivers from the DOS floppy disk included in the ASUS PCI-SC200 and ASUS PCI-SC860 controller card packages to support hard disks and other SCSI devices working under DOS, Microsoft Windows, Microsoft Windows NT, Novell NetWare and IBM OS/2. These drivers provide higher performance than the direct BIOS support. To use these drivers, you must install them into your system and add them to your system configuration files. Driver support for SCSI devices used with SCO UNIX is also provided. These drivers are included in the second SCO UNIX floppy disk. Windows 95 support is also available using the device drivers included within the Windows software. The ASUS PCI-SC200 and ASUS PCI-SC860 are Plug and Play adapters that are auto detected by BIOS and current operating systems that support Plug and Play features. For information about these drivers and their usage, please view the Readme files included in the driver packages. VI. ASUS SCSI Cards (SCSI BIOS) 59

Symbios SCSI BIOS and Drivers
ASUS PCI-SC200 & PCI-SC860 SCSI Cards
The ASUS PCI-SC200 or the ASUS PCI-SC860 may be bundled with your motherboard or purchased separately. Both cards provide the option of connecting internal or external SCSI devices for a total of 7 devices on each SCSI card.
Setting Up the ASUS PCI-SC200 & PCI-SC860
There are two jumper settings you may need to make on the ASUS PCI-SC200 to set it up. One setting assigns the PCI INT interrupt, the other sets the cards termination. The ASUS PCI-SC860 has no jumper settings but you should read the Terminator Requirements. VI. ASUS SCSI Cards (Setup) 60
Setting the INT Assignment for the ASUS PCI-SC200
You must use PCI INT A setting in order to properly assign the ASUS PCI-SC200's interrupt. On the ASUS PCI-SC200, you assign the INT by setting jumper JP1 or JP2. The default setting for the card already is INT A, so you do not need to change the setting to use the ASUS PCI-SC200 with this motherboard.

JPJP 3

JPJP 3 INT C

JPJP 3 INT D

INT A (Def) INT B
Interrupt Settings (A, B, C, or D)
Terminator Requirements for SCSI Devices
SCSI devices are connected together in a chain by cables. Internal devices connect to the ASUS PCI-SC200 or ASUS PCI-SC860 with a fifty-pin flat ribbon cable. External devices connect to the external port with a SCSI-2 cable. If there are more than one internal or external devices, additional devices are connected with cables to form a daisy chain. Terminating the devices on the ends of the SCSI Bus chain is necessary for SCSI devices to work properly. Termination of the devices between the ends must be Disabled.
Many SCSI devices including the ASUS PCI-SC860 use a set of onboard active resistors to terminate the devices at the ends automatically. Automatic termination requires that the SCSI devices be connected in a straight linear connection or chain. Connect SCSI devices to one or two of the SCSI connectors in a linear chain for auto termination of the ASUS PCI-SC860 to be effective. Other formations will cause your SCSI devices to not mount properly. You must use the end of the ribbon cable when using the internal connector(s) to keep a linear path. Additional Note: The Symbios Logic SCSI Configuration Utility is a powerful tool. If, while using it, you somehow disable all your controllers or cannot enter the configuration utility, pressing Ctrl-A after memory count during reboot allows you to recover and reconfigure. VI. ASUS SCSI Cards (Jumpers) 61

Terminator Settings for the ASUS PCI-SC860
Terminator Settings for the ASUS PCI-SC200
The ASUS PCI-SC200, on the other hand, has active termination that you must set using jumper JP5. There are two settings, "terminated" and "not terminated," as shown below.

Terminated (Default)

Not Terminated
Terminator Setting (Terminated / Not Terminated)
Decide whether or not you need to terminate the ASUS PCI-SC200 based on its position in the SCSI chain. Only the devices at each end of the chain need to be terminated. If you have only internal or only external devices connected to the ASUS PCI-SC200, then you must terminate the ASUS PCI-SC200. If you have both internal and external devices connected, you must not terminate the card. See the following example which illustrates this concept.
VI. ASUS SCSI Cards (SCSI ID Numbers) 62
SCSI Device 1 Termination Required (JP5 Open) SCSI Device 2 Termination Required (End Device)
SCSI Device 3 No Termination Required (JP5 Short)
SCSI Device 4 Termination Required (End Device)
Termination Required (End Device) SCSI Device 2 SCSI Device 1
SCSI ID Numbers for SCSI Devices
All SCSI devices, including the ASUS PCI-SC200 and ASUS PCI-SC860 interface card must have a SCSI identification number that is not in use by any other SCSI device. There are eight possible ID numbers, 0 through 7. The ASUS PCI-SC200 and ASUS PCI-SC860 cards have fixed SCSI IDs of 7. The SCSI ID serves two purposes: It uniquely defines each SCSI device on the bus. It determines which device controls the bus when two or more devices try to use it at the same time.
SCSI IDs on one channel do not interfere with the IDs on another channel. This applies to two SCSI host adapters that implement different buses as well as dual channels on a single host adapter. You can connect up to seven SCSI devices to the interface card. You must set a SCSI ID number (ID 0 to ID 6) for each device. SCSI devices vary in how they set the ID number. Some use jumpers, others have some kind of selector switch. Refer to the manual for any device you install for details on how to set its ID number.

WARNING! The use of shielded cables for connection of the monitor to the graphics card is required to assure compliance with FCC regulations. Changes or modifications to this unit not expressly approved by the party responsible for compliance could void the user's authority to operate this equipment.
Canadian Department of Communications Statement
This digital apparatus does not exceed the Class B limits for radio noise emissions from digital apparatus set out in the Radio Interference Regulations of the Canadian Department of Communications.

I. INTRODUCTION

This manual is divided into the following sections: I. Introduction II. Features III. Installation IV. BIOS Software V. DMI Utility VI. Adaptec SCSI Select VII. Adaptec EZ-SCSI VIII. Adaptec 7800 Manual information and checklist Information and specifications concerning this product Instructions on setting up the motherboard Instructions on setting up the BIOS software BIOS supported Desktop Management Interface Adaptec SCSI Select utility (optional) Adaptec EZ-SCSI utility (optional) Adaptec SCSI driver installation and usage (optional) I. INTRODUCTION Manual / Checklist 7
How this Manual is Organized

Item Checklist

Please check that your package is complete. If you discover damaged or missing items, please contact your retailer. (1) ASUS motherboard (2) Retention mechanisms (4) Attach mount bridges (1) IDE ribbon cable for master and slave drives (1) Floppy ribbon cable for (1) 5.25inch floppy and (2) 3.5inch floppies (1) bag of spare jumpers (1) disk or CD with support drivers and utilities: Flash Memory Writer utility to update the onboard programmable BIOS Desktop Management Interface (DMI) utility Bus Master IDE Drivers for various operating systems PC-Cillin 97 (version 3.0) for Windows95 LANDesk Client Manager (LDCM) Software (with optional onboard LM78) Adaptec SCSI drivers and utilities (optional) Readme files for descriptions and use of the files Technical Support Form (1) ASUS C-P2T CPU termination card (1) Users Manual Infrared module (optional) 68-Pin Fast & Wide SCSI cable (optional) 50-Pin Fast SCSI cable (optional)

II. FEATURES

Features of the ASUS P2L97-DS Motherboard
The ASUS P2L97-DS is carefully designed for the discriminating PC user who wants smart features processed by the fastest CPU. This motherboard: Dual Processor Support: Dual Intel Pentium II (233MHz333MHz) processors. Intel Chipset: Features Intels 440LX AGPset with I/O subsystems. Adaptec SCSI Chipset: Supports an optional Adaptecs 7880 Ultra-Fast/Wide SCSI chipset. Enhanced ACPI and Anti-Boot Virus BIOS: Features a programmable BIOS, offering enhanced ACPI for Windows 98 compatibility, built-in hardware-based virus protection throgh Trend ChipAway Virus, and autodetection of most devices for virtually automatic setup. AGP: Supports Accelerated Graphics Port cards for high performance, component level interconnect targeted at 3D graphical display applications. Wake-on-LAN: Supports Wake-on-LAN activity with special network cards, such as the ASUS PCI-L101 10/100 Fast Ethernet PCI card. ISA & PCI Expansion Slots: Provides two 16-bit ISA and four 32-bit PCI slots. Super Multi-I/O: Provides two high-speed UART compatible serial ports and one parallel port with EPP and ECP capabilities. UART2 can also be directed from COM2 to the Infrared Module for wireless connections. Desktop Management Interface (DMI): Supports DMI through BIOS, which allows hardware to communicate within a standard protocol creating a higher level of compatibility. (Requires DMI-enabled components.) (See section V) Ultra DMA/33 BM IDE: Comes with an onboard PCI Bus Master IDE controller with two connectors that supports four IDE devices in two channels, supports Ultra DMA/33, PIO Modes 3 and 4 and Bus Master IDE DMA Mode 2, and supports Enhanced IDE devices, such as Tape Backup and CD-ROM drives. Two floppy drives of either 5.25inch or 3.5inch (1.44MB or 2.88MB) are also supported without an external card. Supports Japanese standard Floppy 3 mode (3.5-inch disk drive: 1.2MB) and LS-120 floppy disk drives (3.5-inch disk drive: 120 MB, 1.44MB, 720K). BIOS supports IDE CD-ROM or SCSI device boot-up. Multi-Cache: Supports a Pentium II processor with either 0, 256, or 512KB Pipelined Burst Level 2 cache in the Single Edge Contact (SEC) cartridge. Versatile Memory Support: Equipped with four DIMM sockets to support [8, 16, 32, 64, 128, or 256 (EDO only) MB] 168-pin SDRAM/EDO memory modules up to 1 GB. IrDA: Supports an optional infrared port module for wireless interface.

II. FEATURES Specifications PB
Introduction to ASUS Smart Motherboards
Performance SDRAM Optimized Performance: The ASUS Smart Motherboards support the new generation memorySynchronous Dynamic Random Access Memory (SDRAM)which increases the data transfer rate from 264MB/s max using EDO memory to 528MB/s max. Double the IDE Transfer Speed: The ASUS Smart Motherboards with Intel PIIX4 PCIset improves IDE transfer rate using Bus Master UltraDMA/33 IDE, which can handle data transfers up to 33MB/s. This new technology is compatible with existing ATA-2 IDE specifications so there is no need to upgrade current hard disk drives or cables. Concurrent PCI: Concurrent PCI allows multiple PCI transfers from PCI master busses to memory to CPU. ACPI Ready: ACPI (Advanced Configuration and Power Interface) is also implemented on all ASUS Smart Motherboards. ACPI provides more Energy Saving Features for future operating systems (OS) supporting OS Direct Power Management (OSPM) functionality. With these features implemented in the OS, PCs can be ready around-the-clock, yet satisfy all the energy saving standards. To fully utilize the benefits of ACPI, an ACPI-supported OS, such as the successor to Windows 95, must be used. PC 97 Compliant: Both the BIOS and hardware levels of ASUS Smart Motherboards meet PC 97 compliancy. The new PC 97 requirements for systems and components are based on the following high-level goals: support for Plug and Play compatibility and power management for configuring and managing all system components, and 32-bit device drivers and installation procedures for both Windows 95 and Windows NT. Intelligence (with optional LM78 Hardware Monitor only): Fan Status Monitoring and Alarm: To prevent system overheat and system damage, the CPU fan and system fans are monitored for RPM and failure. Each fan can be set for its normal RPM range and alarm thresholds. Voltage Monitoring and Alert: System voltage levels are monitored to ensure stable current to critical motherboard components. Voltage specifications are more critical for future processors, so monitoring is necessary to ensure proper system configuration and management.
II. FEATURES Smart Motherboard
System Resources Alert: Todays operating systems, such as Windows 95, Windows NT, and OS/2, require much more memory and hard drive space to present enormous user interfaces and run large applications. The system resource monitor will warn the user before the system resources are used up to prevent possible application crashes. Suggestions will give the user information on managing their limited resources more efficiently. Auto Fan Off: The system fans will power off automatically even in sleep mode. This function reduces both energy consumption and system noise, and is a important feature to implement silent PC systems. Dual Function Power Button (requires ATX power supply): The system can be in one of two states, one is Sleep mode and the other is the Soft-Off mode. Pushing the power button for less than 4 seconds places the system into Sleep mode. When the power button is pressed for more than 4 seconds, it enters the Soft-Off mode. Remote Ring On (requires ATX power supply): This allows a computer to be turned on remotely through a modem. With this benefit on-hand, any user can access vital information from their computer from anywhere in the world! Message LED (requires ACPI OS support): Chassis LEDs now act as information providers. Through the way a particular LED illuminates, the user can determine the stage the computer is in. A simple glimpse provides useful information to the user.

III. INSTALLATION System Memory PB

20 Pins 60 Pins

88 Pins
168-Pin DIMM Memory Sockets
The DIMMs must be 3.3V Unbuffered for this motherboard. To determine the DIMM type, check the notches on the DIMMs (see figure below).
168-Pin DIMM Notch Key Definitions (3.3V)
The notches on the DIMM module will shift between left, center, or right to identify the type and also to prevent the wrong type from being inserted into the DIMM slot on the motherboard. You must tell your retailer the correct DIMM type before purchasing. This motherboard supports four clock signals.

(FRONT)

DRAM Key Position Unbuffered RFU Buffered
Voltage Key Position 5.0V 3.3V Reserved
3. Central Processing Unit (CPU)
The ASUS P2L97-DS motherboard provides two Single Edge Contact (SEC) slots for Pentium II processors packaged in SEC cartridges.

Pentium II Processor

You should check to see that you have two sets of the following items:

Lock Holes

Captive Nut
Pentium II Retention Mechanism

Attach Mount Bridges

The recommended heatsinks (see section on recommended heatsinks for more information) for the Pentium II processor are those with three-pin fans that can be connected to the fan connectors on the motherboard. WARNING! Be sure that sufficient air circulation is available across the processors heatsink by regularly checking that your CPU fan is working. Without sufficient circulation, the processor could overheat and damage both the processor and the motherboard. You may install an auxiliary fan, if necessary. Other Important Items
Intel Pentium II Processor in a SEC Cartridge (233-333MHz 512KB/128KB/0KB L2 Cache)
ASUS C-P2T CPU Termination Card

III. INSTALLATION CPU

The ASUS P2L97-DS As Shipped The ASUS P2L97-DS is shipped with the attach mount bridges already installed.
SEC slots for the Pentium II processor
NOTE: Encircled items are points where the attach mount bridges are factory-installed

III. INSTALLATION CPU 22

Installing the Pentium II Processor 1. Mount the Pentium II Retention Mechanism: The retention mechanism is designed to fit into the SEC slot only one way. TIP: Orient the mechanisms lock holes toward the motherboards chipset (see motherboard layout for the location of the Intel 440LX AGPset). Be sure to align the notch in the mechanism with the small rib on one side of the slot and that the mechanism is properly seated on the board. Then, screw the captive nuts in place. WARNING! Do not overtighten the captive nuts. Doing so could damage your motherboard. Tighten captive nuts to no more than 61 inch/pound.

4. 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. First read your expansion card documentation for hardware and software settings that may be required to set up your specific card.
Expansion Card Installation Procedure
1. 2. 3. 4. 5. 6. 7. 8. 9. Read the documentation for your expansion card. Set any necessary jumpers on your expansion card. Remove your computer systems cover. Remove the bracket on the slot you intend to use. Keep the bracket for possible future use. Carefully align the cards connectors and press firmly. Secure the card on the slot with the screw you removed in step 4. Replace the computer systems cover. Set up the BIOS if necessary (such as IRQ xx Used By ISA: Yes in PNP AND PCI SETUP) Install the necessary software drivers for your expansion card.
III. INSTALLATION Expansion Cards 26
Assigning IRQs for Expansion Cards
Some expansion cards need to use an IRQ to operate. Generally an IRQ must be exclusively 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. Both ISA and PCI expansion cards may require to use IRQs. System IRQs are available to cards installed in the ISA expansion bus first, then any remaining IRQs are available to PCI cards. Currently, there are two types of ISA cards. The original ISA expansion card design, now referred to as legacy ISA cards, requires that you configure the cards jumpers manually and then install it in any available slot on the ISA bus. You may use Microsoft Diagnostics (MSD.EXE) utility located in the Windows directory to see a map of your used and free IRQs. If you use Windows 95, the Resources tab under Device Manager displays the resource settings being used by a particular device (to gain access, double-click the System icon under the Control Panel program). Ensure that no two devices share the same IRQs or your computer will experience problems when those two devices are in use at the same time.
To simplify this process, this motherboard complies with the Plug and Play (PnP) specification, which was developed to allow automatic system configuration whenever a PnP-compliant card is added to the system. For PnP cards, IRQs are assigned automatically from those available. If the system has both legacy and PnP ISA cards installed, IRQs are assigned to PnP cards from those not used by legacy cards. The PCI and PNP configuration section of the BIOS setup utility can be used to assign which IRQs are being used by legacy cards. For older legacy cards that do not work with the BIOS, you may contact your vendor for an ISA Configuration Utility. An IRQ number is automatically assigned to PCI expansion cards after those used by legacy and PnP ISA cards. In the PCI bus design, the BIOS automatically assigns an IRQ to a PCI slot that contains a card requiring an IRQ. To install a PCI card, you need to set the INT (interrupt) assignment. Since all the PCI slots on this motherboard use an INTA #, set the jumpers on your PCI cards to INT A.

Rotation +12V Ground

CPU Fan Power
NOTE: If you are installing two processors, you may connect the fan from the second heatsink to either the power supply or chassis fan connector.

Chassis Fan Power

Power Supply Fan Power

12Volt Cooling Fan Power

Ground +12V Rotation
TIP: If the case-mounted LED does not light, try reversing the 2-pin plug.
10. IrDA-Compliant infrared module connector (5-pin IR) This connector supports the 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 in Chipset Features Setup to select whether UART2 is directed for use with COM2 or IrDA. Use the five pins as shown on the Back View and connect a ribbon cable from the module to the motherboard according to the pin definitions.

Front View Back View

IRRX (NC) GND

IRTX GND IRRX

+5V (NC)
Infrared Module Connector
For the infrared feature to be available, you must connect the optional Infrared (IrDA) module to the motherboard
IMPORTANT: Make sure that your ATX power supply can supply at least 10mAmp on the 5-volt standby lead (5VSB). You may experience difficulty in powering on your system if your power supply cannot support the load. For Wake on LAN support, your ATX power supply must supply at least 720mAmp.
+12.0Volts +5V Standby Power Good Ground +5.0 Volts Ground +5.0 Volts Ground +3.3 Volts +3.3 Volts
+5.0 Volts +5.0 Volts -5.0 Volts Ground Ground Ground Power Supply On Ground -12.0Volts +3.3Volts
11. ATX Power Supply Connector (20-pin ATXPWR) This connector connects to a ATX power supply. The plug from the power supply will only insert in one orientation because of the different hole sizes. Find the proper orientation and push down firmly but gently making sure that the pins are aligned.
12. Wake on LAN (3-pin WOL) This connector connects to LAN cards with a Wake On LAN output. When the system is in soft-off mode, LAN activity will power on the system.

No connection Ground +5 Volt Standby
IMPORTANT: Requires an ATX power supply with at least 720ma +5-volt standby power

Wake on LAN Connector

68-pin Fast/Wide SCSI Connector
50-pin Fast/Narrow SCSI Connector

Onboard SCSI Connectors

IMPORTANT: The 68-Pin Ultra-Wide SCSI Connector is always terminated and will only work as an end device.

Wide SCSI device

Wide SCSI device (end)
motherboard is an end device and has permanent termination
SCSI devices in-between must not be terminated
last SCSI device must be terminated
NOTE: Up to 15 devices can be connected with 50-Pin Fast-SCSI and 68-Pin Ultra-Wide SCSI combined.
13. Ultra-Fast SCSI & Ultra-Wide SCSI Connectors (optional) This motherboard supports an optional onboard 50-Pin Ultra-Fast SCSI connector for 8-bit SCSI devices and 68-Pin Ultra-Wide SCSI connector for 16-bit SCSI devices.
14. LED Lead (TB_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 transfer or waiting in the inbox. This function requires OS and driver support. 15. SMI Suspend Switch Lead (SMI) This allows the user to manually place the system into a suspend mode or Green mode where system activity will be decreased to save electricity and expand the life of certain components when the system is not in use. This 2-pin connector connects to the case-mounted suspend switch. If you do not have a switch for the connector, you may use the Turbo Switch. SMI is activated when it detects a short to open moment and therefore leaving it shorted will not cause any problems. This may require one or two presses depending on the position of the switch. Wake-up can be controlled by settings in the BIOS but the keyboard will always allow wake-up (the SMI lead cannot wake up the system). If you want to use this connector, set Suspend Mode under the Power Management Setup of the BIOS SOFTWARE section to the preferred time after which the system must go into suspend mode when you press the switch. 16. ATX Power Switch / Soft Power Switch (PWR_SW) The system power is controlled by a momentary switch connected to this lead. Pressing the button once will switch the system between ON and SLEEP. Pressing 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 systems power. 17. Reset Switch Lead (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 systems power supply. 18. System Power LED (KEYLOCK) This 3-pin connector connects the system power LED, which lights when the system is powered on and blinks when it is in sleep mode. 19. Keyboard Lock Switch Lead (KEYLOCK) This 2-pin connector connects to the case-mounted key switch to allow keyboard locking. 20. Speaker Connector (SPEAKER) This 4-pin connector connects to the case-mounted speaker.

III. INSTALLATION Connectors 34
Turbo LED SMI Lead ATX Power Switch* Reset SW
+5 V TB_LED ExtSMI# Ground PWR +3VSB ResetCon Ground
Power LED Keyboard Lock Speaker Connector
PLED KEYLOCK Ground +5V Ground Ground SPEAKER
* Requires an ATX power supply.

System Panel Connections

21. Chassis Open Alarm Lead (CHASSIS) This lead is for an open chassis monitor. A high level signal to the CHASSIS lead will indicate to the system that the chassis has been opened. This function is available only with the optional hardware monitor (LM78) installed.

+5 Volts

Chassis Signal Ground

Chassis Open Alarm Lead

(This page was intentionally left blank)
Power Connection Procedures
1. After all jumpers and 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 users 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 monitor LED may light up after the systems 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, additional messages will appear on the screen. If you do not see anything 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 connections or call your retailer for assistance. 7. During power-on, hold down <Delete> to enter BIOS setup. Follow the instructions in the next section, BIOS SOFTWARE. * Powering Off your computer: You must first exit or shut down your operating system before switching off the power switch. For ATX power supplies, you can press the ATX power switch after exiting or shutting down your operating system. If you use Windows 95, click the Start button, click Shut Down, and then click Shut down the computer?. The system will give three quick beeps after about 30 seconds and then power 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. III. INSTALLATION Power Connections 37

IV. BIOS SOFTWARE

Flash Memory Writer Utility
This motherboard has an onboard SCSI BIOS and boot virus protection and therefore, requires a 2Mbit flash ROM. AFLASH.EXE: This is the Flash Memory Writer utility that updates the BIOS by uploading a new BIOS file to the 2Mbit programmable flash ROM chip on the motherboard. To determine the BIOS version of your motherboard, 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. This file works only in DOS mode. NOTE: The following screen displays are provided as examples only and may not reflect the screen contents displayed on your system.
IV. BIOS Flash Memory Writer 38
IMPORTANT! If unknown is displayed 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.

Main Menu

1. Save Current BIOS To File
This option allows you to save a copy of the original motherboard BIOS in case you need to reinstall it. It is recommended that you save AFLASH.EXE and the BIOS file to a bootable floppy disk.
To save your current BIOS, type [1] at the Main Menu and then press <Enter>. The Save Current BIOS To File screen appears. Type a filename and the path, for example, A:\440XX1 and then press <Enter>.
2. Update BIOS Including Boot Block and ESCD
This option updates the boot block, the baseboard BIOS, and the ACPI extended system configuration data (ESCD) parameter block from a new BIOS file. See the next page for procedures on downloading an updated BIOS file. To update your current BIOS, type 2 at the Main Menu and then press <Enter>. The Update BIOS Including Boot Block and ESCD screen appears. Type the filename of your new BIOS and the path, for example, A:\BX2I1002.AWD, and then press <Enter>. When prompted to confirm the BIOS update, press Y to start the update.
The utility starts to program the new BIOS information into the flash ROM. When the programming is finished, Flashed Successfully will be displayed.
Follow the onscreen instructions to continue.
IV. BIOS Flash Memory Writer
Managing and Updating Your Motherboards BIOS
Upon First Use of the Computer System 1. Create a bootable system floppy disk by typing [FORMAT A:/S] from the DOS prompt without creating AUTOEXEC.BAT and CONFIG.SYS files. 2. Copy AFLASH.EXE to the just created boot disk. 3. Run AFLASH.EXE from this new disk and select option 1. Save Current BIOS to File. See 1. Save Current BIOS To File on the previous page for more details and the rest of the steps. Updating BIOS Procedures (only when necessary) 1. Download an updated ASUS BIOS file from the Internet (WWW or FTP) or a BBS (Bulletin Board Service) (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>. See 2. Update BIOS Including Boot Block and ESCD on the previous page for more details and the rest of the steps. 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, reinstall the original BIOS file that you saved to disk earlier. 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 service.

IV. BIOS Updating BIOS 40

6. BIOS Setup

The motherboard supports two programmable Flash ROM chips: 5-Volt and 12Volt. Either of these memory chips can be updated when BIOS upgrades are released. Use the Flash Memory Writer utility to download the new BIOS file into the ROM chip as described in detail in this section. All computer motherboards provide a Setup utility program for specifying the system configuration and settings. If your motherboard came in a computer system, the proper configuration entries may have already been made. If so, invoke the Setup utility, as described later, and take note of the configuration settings for future reference; in particular, the hard disk specifications. If you are installing the motherboard, reconfiguring your system or you receive a Run Setup message, you will need to enter new setup information. This section describes how to configure your system using this utility. The BIOS ROM of the system stores the Setup utility. When you turn on 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 pressing the mentioned key(s), POST will continue with its test routines, thus preventing you from calling up Setup. If you still need to call Setup, reset the system by pressing <Ctrl> + <Alt> + <Delete>, or by pressing the Reset button on the system case. You can also restart by turning the system off and then back on again. But do so only if the first two methods fail. When you invoke Setup, the CMOS SETUP UTILITY main program screen will appear with the following options:

IV. BIOS BIOS Setup

Load Defaults
The Load BIOS Defaults option loads the minimum settings for troubleshooting. Load Setup Defaults, on the other hand, is for loading optimized defaults for regular use. Choosing defaults at this level will modify all applicable settings. A section at the bottom of the previous screen displays the control keys for this screen. Take note of these keys and their respective uses. Another section just below the control keys section displays information on the currently highlighted item in the list.

Video Memory Cache Mode (UC) USWC (uncacheable, speculative write combining) is a new cache technology for the video memory of the processor. It can greatly improve the display speed by caching the display data. You must leave this on the default setting of UC (uncacheable) if your display card cannot support this feature, otherwise your display may not show properly. PCI 2.1 Support (Enabled) This function allows you to enable or disable PCI 2.1 features. Leave on the default Enabled setting for PCI 2.1 compliancy. Memory Hole At 15M16M (Disabled) Enabling this feature reserves 15MB to 16MB memory address space to ISA expansion cards that specifically require this setting. This makes the memory from 15MB and up unavailable to the system. Expansion cards can only access memory up to 16MB. The default is Disabled. DRAM are xx bits wide If all your memory modules have ECC chips (e.g., 8 chips + 4 ECC chips), they are c J % H M / Adobe Photoshop Version 4.0 3-BIOS.eps -
/ 32bits and the following will be displayed instead:
Data Integrity Mode (Non-ECC) Non-ECC has byte-wise write capability but no provision for protecting data integrity in the DRAM array. EC-Only data errors are de G M M M d d G M M d G d G M M d x G M M d d G M M d d G M M d d G M M d d G d d GMM d d GMM d d
Onboard FDC Swap A & B (No Swap) This field allows you to reverse the hardware drive letter assignments of your floppy disk drives. Two options are available: No Swap and Swap AB. If you want to switch drive letter assignments through the onboard chipset, set this field to Swap AB. Onboard Serial Port 1 (3F8H/IRQ4) Settings are 3F8H/IRQ4, 2F8H/IRQ3, 3E8H/IRQ4, 2E8H/IRQ10, and Disabled for the onboard serial connector. Onboard Serial Port 2 (2F8H/IRQ3) Settings are 3F8H/IRQ4, 2F8H/IRQ3, 3E8H/IRQ4, 2E8H/IRQ10, and Disabled for the onboard serial connector. Onboard Parallel Port (378H/IRQ7) This field sets the address of the onboard parallel port connector. You can select either: 3BCH / IRQ 7, 378H / IRQ 7, 278H / IRQ 5, Disabled. If you install an I/O card with a parallel port, ensure that there is no conflict in the address assignments. The PC can support up to three parallel ports as long as there are no conflicts for each port. Parallel Port Mode (ECP+EPP) This field allows you to set the operation mode of the parallel port. The setting Normal, allows normal-speed operation but in one direction only; EPP allows bidirectional parallel port operation at maximum speed; ECP allows the parallel port to operate in bidirectional mode and at a speed faster than the maximum data transfer rate; ECP+EPP allows normal speed operation in a two-way mode. ECP DMA Select (3) This selection is available only if you select ECP or ECP+EPP in the Parallel Port Mode. Select either DMA Channel 1, 3, or Disable. UART2 Use Infrared (Disabled) When enabled, this field activates the onboard infrared feature and sets the second serial UART to support the infrared module connector on the motherboard. If your system already has a second serial port connected to the onboard COM2 connector, it will no longer work if you enable the infrared feature. By default, this field is set to Disabled, which leaves the second serial port UART to support the COM2 serial port connector. See IrDA-compliant infrared module connector under section III. Onboard PCI IDE Enable (Both) You can select to enable the primary IDE channel, secondary IDE channel, both, or disable both channels (for systems with only SCSI drives). IDE 0 Master/Slave PIO/DMA Mode, IDE 1 Master/Slave PIO/DMA Mode (Auto) Each channel (0 and 1) has both a master and a slave making four IDE devices possible. Because each IDE device may have a different Mode timing (0, 1, 2, 3, 4), it is necessary for these to be independent. The default setting of Auto will allow auto-detection to ensure optimal performance. IV. BIOS Chipset Features 50

DOS and Windows3.1x ASPI Managers
ASPI (Advanced SCSI Programming Interface) managers are software programs that enable the SCSI device drivers, your host adapter, and your SCSI devices to communicate with each other. ASPI managers are written for a specific operating system, such as DOS, and a specific family of Adaptec host adapters. Adaptec EZSCSI includes several ASPI managers for DOS/Windows3.1x. When you install Adaptec EZSCSI on these operating systems, it detects what kind of host adapter is installed in your computer and automatically configures your system with the correct ASPI manager. To learn more about these ASPI managers, including their command line option information, see the Adaptec EZSCSI Online Reference, a Windows Help application.
VII. EZ-SCSI UTILITY DOS/Win Info.

DOS Formatting Utilities

Adaptec EZSCSI includes several DOS-based formatting utilities:
Low-level Formatter (scsifmt)
Use the DOS-based scsifmt utility for low-level formatting of SCSI hard disk drives, removable media, Floptical drives, and magneto-optical drives. You can also use it to scan a disk device for surface defects before you store data on it. Run scsifmt from the DOS prompt, not from the Windows MSDOS prompt. Before you run it, be sure the disk devices you want to format are connected to the host adapter and that they are powered. Then follow these steps: 1. Change to the directory where scsifmt.exe is located (usually c:\scsi), type scsifmt at the DOS prompt, and press Enter. NOTE: If you are formatting a SCSI disk device that supports more than one LUN (for example, Iomegas Bernoulli dual multidrive) type scsifmt / L at the command line. 2. When the first screen appears, read it and press Enter to continue. (Press F1 at any time to view Help.) Information about your SCSI disk devices appears on the screen. 3. Use the arrow keys to move the highlight bar to a disk device you want to format or verify, then press Enter. 4. When the next screen appears, select either Format or Verify (to verify that the disk is free of surface defects), then press Enter. WARNING! Back up important data before you format the disk device! A low-level format erases all data from the disk. 5. If you select Format, confirm that you want to format the disk, then wait while the disk device is formatted. This may take a long time if the disk is large. If you select Verify, you can press Esc at any time to stop the verification process. (This does not damage the disk.) If the utility finds bad blocks on the disk, it displays information about them. You can reassign the bad block(s) to prevent data from being stored there. 6. Repeat steps 3, 4, and 5, as needed, to format or verify other disk devices. When you are finished, press Esc to exit.

VII. EZ-SCSI UTILITY Formatting 70
Formatter and Partitioner (afdisk)
Use the DOS-based afdisk utility to partition and format SCSI hard disk drives, Floptical drives, and magneto-optical drives. You can also use afdisk to remove DOS and non-DOS partitions from a disk drive and to format removable media in standard hard disk format, OS/2 floppy format, or DOS V (Japanese) format. NOTE: Use afdisk only if the disk device is not controlled by the host adapter BIOS that is, if the host adapter does not have a BIOS or if its BIOS is not enabled. If the disk device is controlled by the host adapter BIOS, use the DOS fdisk utility to partition and format the disk device. (See the MSDOS documentation.) Run afdisk from the DOS prompt only, not from the Windows MSDOS prompt. Before you run it, be sure the disk devices you want to format and partition are connected to the host adapter and that they are powered. Then follow these steps: 1. Change to the directory where afdisk.exe is located (usually c:\scsi), type afdisk at the DOS prompt, and press Enter. Information about your SCSI disk devices appears on the screen. (The number that appears after Target is the devices SCSI ID.) 2. Use the arrow keys to move the highlight bar to the disk device you want to partition, then press Enter. - If the selected disk device is controlled by the host adapter BIOS, you can view information about it but you cannot partition it with afdisk (Use the DOS fdisk and format utilities.) - If the selected disk device is unpartitioned, you must partition it before you can format it. To do this, follow the instructions on the screen. (Press F1 to see an explanation of the partitioning options.) Information about the selected disk device appears in the lower left of the screen. Disks smaller than 1Gigabyte have 64 heads, 32 sectors per track, and cylinders equal to the number of MBytes of available capacity. Disks larger than 1Gigabyte have 255 heads, 63sectors per track, and one cylinder per 8MBytes of available capacity.
VII. EZ-SCSI UTILITY Partitioning
3. To create a new partition on the disk device, press Ins. A screen similar to this appears:
Adaptec SCSI Disk Setup Program v3.33 Select SCSI Device to Partition HA #0 - Target 0 HA #0 - Target 4 Type Start End Megs
QUANTUM LP105S 910109405 IOMEGA BETA90
VII. EZ-SCSI UTILITY Partitioning 72
Logical Drive Info head sectors/track cylinders bytes/sector
Create a DOS Partition Start Cylinder: End Cylinder: 0 84
85 megabytes 2AEEFh blocks
<Ins> Create, <Del> Delete, <F1> Help, <Esc> Exit
The Create a DOS Partition window suggests that you create one partition on the disk device, equal to its entire capacity. If this is what you want to do, skip to step5. 4. To change the size of the partition, use the arrow keys to select Start Cylinder and End Cylinder, and type in the numbers you want. Partitions up to 2Gigabytes are supported. 5. When the number of cylinders is what you want, press Esc. When the confirmation prompt appears, select Yes and press Enter to create the partition. To create more partitions on the same disk device, repeat steps 3, 4, and 5. As you create partitions on the disk, they are added to the window at the upper right of the screen, as shown here:

Adaptec SCSI Disk Setup Program v3.33 Select SCSI Device to Partition HA #0 - Target 0 HA #0 - Target 4 Type Start 0 End 84 Megs 85
DOS QUANTUM LP105S 910109405 IOMEGA BETA90
85 megabytes 2AEEFh blocks <Ins> Create, <Del> Delete, <F1> Help, <Esc> Exit
6. Press Esc to return to the Select SCSI Device to Partition window. If you want to partition a different disk device, select the device from the list and repeat the earlier steps. 7. To quit afdisk, press Esc and select Yes to confirm that you want to quit.