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

ASUS CONTACT INFORMATION

ASUSTeK COMPUTER INC.

Marketing Info
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Technical Support

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ASUS COMPUTER INTERNATIONAL
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ASUS COMPUTER GmbH

Address: Telephone: Fax: Email: Harkort Str. 25, 40880 Ratingen, BRD, Germany 49-2102-445011 49-2102-442066 info-ger@asus.com.tw

II. FEATURES (Specifications) 8
The ASUS P2L97 Motherboard

Intel 440LX AGPset

3 DIMM Sockets
T: USB Port 1 B: USB Port 2 B: COM 1

T: Parallel B: Serial

B: COM 2
Accelerated Graphics Port 4 PCI Slots

Programmable Flash ROM

1 ISA/PCI Share

1 ISA Slot

II. FEATURES (Motherboard Parts)
T: PS/2 Mouse B: PS/2 Keyboard

III. INSTALLATION

Layout of the ASUS P2L97 Motherboard

T: Mouse B: Keyboard

PWR_FAN CPU_FAN

T: USB 1 B: USB 2

ATX Power Conenctor
Single Edge Contact CPU Slot
DIMM Socket 2 (64 bit, 168 pin module)
DIMM Socket 3 (64 bit, 168 pin module)
DIMM Socket 1 (64 bit, 168 pin module)

Parallel Port

CR2032 3V Lithium Cell (BIOS Power)

Secondary IDE

Floppy Drives
Accelerated Graphics Port

Wake on LAN Connector

Multi-I/O

PCI Slot 1

BUS FREQ

FS0 FS1 FS2

Flash EEPROM (Programable BIOS)

PCI Slot 2

PCI Slot 3 Intel PIIX4 PCIset PCI Slot 4

Hardware Monitor

PCI Slot 5

Primary IDE

CHA_FAN

BF3 BF2 BF1 BF0

III. INSTALLATION (Board Layout) 10

ISA Slot 1

Infrared Connector IDE LED

ISA Slot 2

Panel Connectors

Jumpers

1) CLRTC 2) FS0, FS1, FS2 3) BF0, BF1, BF2, BF3 p. 13 Real Time Clock (RTC) RAM (Short/Clear CMOS) p. 14 CPU External Clock (BUS) Frequency Selection p. 14 CPUBUS Frequency Ratio

Expansion Slots/Sockets

1) 2) 3) 4) 5) 6) System Memory DIMM Sockets SEC CPU Slot SLOT1, SLOT2 PCI1, 2, 3, 4, 5 AGP p. 15 System Memory Support p. 16 DIMM Memory Module Support p. 19 Single Edge Contact CPU Support p. 24 16-bit ISA Bus Expansion Slots* p. 24 32-bit PCI Bus Expansion Slots p. 25 Accelerated Graphics Port

Connectors

1) 2) 3) 4) 5) 6) 7) 8) 9) 10) 11) 12) 13) 14) 15) 16) 17) 18) 19)
PS2KEYBOARD p. 26 PS/2 Keyboard Connector (6-pin female) PS2MOUSE p. 26 PS/2 Mouse Connector (6-pin female) PRINTER p. 27 Parallel (Printer) Port Connector (25-pin female) COM1, COM2 p. 27 Serial Port COM1 & COM2 (two 9-pin male) FLOPPY p. 27 Floppy Drive Connector (34-pin block) USB p. 28 Universal Serial BUS Ports 1 & 2 (two 4-pin female) Primary / Second IDE p. 28 Primary / Secondary IDE Connector (40-pin blocks) IDELED p. 29 IDE LED Activity Light (2 pins) CHA_, PWR_, CPU_FAN p. 29 Chassis, Power Supply, CPU Fan Power Lead (3-pin block) IR p. 30 Infrared Port Module Connector (5 pins) ATXPWR p. 30 ATX Motherboard Power Connector (20-pin block) WOL p. 31 Wake on LAN Connector (3 pins) (Reserved) MSG LED (PANEL) p. 32 System Message LED (2 pins) SMI (PANEL) p. 32 SMI Switch Lead (2 pins) PWR SW (PANEL) p. 32 ATX Power & Soft-Off Switch Lead (2 pins) RESET (PANEL) p. 32 Reset Switch Lead (2 pins) PWR LED (PANEL) p. 32 System Power LED Lead (3 pins) KEYLOCK (PANEL) p. 32 Keyboard Lock Switch Lead (2 pins) SPEAKER (PANEL) p. 32 Speaker Output Connector (4 pins)

Jumper Settings

1. Real Time Clock (RTC) RAM (CLRTC) The CMOS RAM is powered by the onboard button cell battery. To clear the RTC data: (1) Turn off your computer and unplug your AC power, (2) Short the two points (Labeled: CLRTC), (3) Turn on your computer, (4) Hold down <Delete> during bootup and enter BIOS setup to re-enter user preferences.

Clear RTC RAM

III. INSTALLATION (Jumpers)
Short small solder points to clear CLRTC
2. CPU Bus Frequency (FS0, FS1, FS2) This option tells the clock generator what frequency to send to the CPU. This allows the selection of the CPUs External frequency (or BUS Clock). The BUS Clock multiplied by the BUS Ratio equals the CPUs Internal frequency (the advertised CPU speed). 3. CPU Core:BUS Frequency Multiple (BF0, BF1, BF2, BF3) This option sets the frequency ratio between the Internal frequency of the CPU and the CPUs External frequency. These must be set in conjunction with the CPU Bus Frequency.
FS2 FS1 FS0 FS2 FS1 FS0 FS2 FS1 FS0
3 66MHz 75MHz 3 83MHz 3 60MHz

FS2 FS1 FS0

CPU Bus Frequency
BF3 BF3 BF3 BF3 BF3 BF2 BF2 BF2 BF2 BF2 BF1 BF1 BF1 BF1 BF1 BF0 BF0 BF0 BF0 BF0 2.0x(2/1) 3.5x(7/2) 4.0x(4/1) 4.5x(9/2) 5.0x(5/1) 3
III. INSTALLATION (Jumpers) 14
CPU Core:Bus Frequency Multiple
WARNING! Frequencies above 66Mhz exceed the specifications for the onboard Intel Chipset and are not guaranteed to be stable.
Intel Pentium II Processor in a SEC Cartridge (233-333MHz 256/512KB L2 Cache)
Set the jumpers by the Internal speed of your processor as follows:
CPU Model Intel Pentium II Intel Pentium II Intel Pentium II Intel Pentium II Freq. 333MHz 300MHz 266MHz 233MHz Ratio 5.0x 4.5x 4.0x 3.5x BUS F. 66MHz 66MHz 66MHz 66MHz (BUS Freq.) FS2 FS1 FS0 [1-2] [1-2] [1-2] [1-2] [1-2] [1-2] [1-2] [1-2] [1-2] [1-2] [1-2] [1-2] BF3 [2-3] [2-3] [2-3] [2-3] (Freq. Ratio) BF2 BF1 [1-2] [1-2] [1-2] [2-3] [1-2] [2-3] [2-3] [1-2] BF0 [2-3] [1-2] [2-3] [1-2]
NOTES: Overclocking your processor is not recommended. It may result in a slower speed. Voltage Regulator Output Selection (VID) is not needed for the Pentium II processor because it sends a VID signal directly to the onboard power controller.

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.

Push Clamp

(9) (8)
Push each end of the clamps until they lock
Push Clamp The thermal pad & SEC cartridge should not have a gap! SEC Cartridge with Heatsink (Side View) SEC Cartridge with Heatsink (Top View)
3. Insert the SEC Cartridge: Push the SEC cartridges two locks inward (the preceding picture shows the locks in the outward position and inward in the picture below). With the heatsink facing the motherboards chipsets, press the cartridge gently but firmly until it is full inserted.

Push lock inward

4. Secure the SEC Cartridge: Secure the SEC cartridge in place by pushing the SEC cartridge locks outward so that the lock shows through the retention mechanisms lock holes.

(3) (3)

III. INSTALLATION (CPU) 22
5. Secure the Heatsink: Install the heatsink support base into the motherboard. This is not, however, necessary if you use a heatsink with fan (see next page). The support base is necessary to secure the heatsink (without fan). Secure the heatsink by sliding the heatsink support top bar into the bottom groove of the heatsink until it locks into the heatsink support base posts.
Heatsink support top bar (4) Heatsink support base post
Heatsink support base (7)
The heatsinks shown in this manual are for reference purposes only. The recommended heatsinks for the Pentium II processor are those with three-pin fans that can be connected to the CPU fan connector on motherboard. These heatsinks have the added benefits of proper heat dissipation and with the LM78 hardware monitor, the ability to monitor the fans RPM and use the alert function through the included LANDesk Client Manager (LDCM) software.

AAVID Heatsink

The procedures for installing the AAVID heatsink with fan is similar as that for the heatsink without a fan. You will not, however, be able to use the heatsink support top bar because of the fan. The heatsink support top bar will, however, still be included in the package, in case you use a heatsink without a fan.

Elan Vital Heatsink

The procedures for installing the Elan Vital heatsink with fan is also similar as that for the heatsink without a fan. The Elan Vital heatsink, however, comes with a lever to clamp the heatsink into the SEC cartridge. Mount the heatsink in the orientation as shown then flip the lever from Unlock to Lock. You will not be able to also use the heatsink support top bar because of the fan. The heatsink support top bar will, however, still be included in the package, in case you use a heatsink without a fan.

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) 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.
Assigning DMA Channels for ISA Cards
Some ISA cards, both legacy and PnP, may also need to use a DMA (Direct Memory Access) channel. DMA assignments for this motherboard are handled the same way as the IRQ assignment process described earlier. You can select a DMA channel in the PCI and PnP configuration section of the BIOS Setup utility. IMPORTANT: To avoid conflicts, reserve the necessary IRQs and DMAs for legacy ISA cards (under PNP AND PCI SETUP of the BIOS SOFTWARE, choose Yes in IRQ xx Used By ISA and DMA x Used By ISA for those IRQs and DMAs you want to reserve).
ISA Cards and Hardware Monitor
The onboard hardware monitor uses the address 290H-297H so legacy ISA cards must not use this address or else conflicts will occur. Accelerated Graphics Port This motherboard provides an accelerated graphics port (AGP) slot to support a new generation of graphics cards with ultra-high memory bandwidth, such as the ASUS AGP-V264GT3 and ASUS AGP-V3000ST.

ASUS AGP-V264GT3

ASUS AGP-V3000ST
Accelerated Graphics Port (AGP)
III. INSTALLATION (DMA Channels)

5. External Connectors

WARNING! Some pins are used for connectors or power sources. These are clearly separated from jumpers in Map of the Motherboard. Placing jumper caps over these will cause damage to your motherboard. IMPORTANT: Ribbon cables should always be connected with the red stripe on the Pin 1 side of the connector. The four corners of the connectors are labeled on the motherboard. Pin 1 is the side closest to the power connector on hard drives and floppy drives. IDE ribbon cable must be less than 18in. (46cm), with the second drive connector no more than 6in. (15cm) from the first connector. 1. PS/2 Keyboard Connector (6-pin Female) This connection is for a standard keyboard using an PS/2 plug (mini DIN). This connector will not allow standard AT size (large DIN) keyboard plugs. You may use a DIN to mini DIN adapter on standard AT keyboards.

III. INSTALLATION (Connectors) 26
PS/2 Keyboard (6-pin Female)
2. PS/2 Mouse Connector (6-pin Female) The system will direct IRQ12 to the PS/2 mouse if one is detected. If not detected, expansion cards can use IRQ12. See PS/2 Mouse Control in BIOS Features Setup of the BIOS SOFTWARE.
PS/2 Mouse (6-pin Female)
3. Parallel Printer Connector (25-pin Female) You can enable the parallel port and choose the IRQ through Onboard Parallel Port in Chipset Features Setup of the BIOS SOFTWARE. NOTE: Serial printers must be connected to the serial port.
Parallel (Printer) Port (25-pin Female)
COM 1 COM 2 Serial Ports (9-pin Male)
5. Floppy Disk Drive Connector (34-1pin FLOPPY) This connector supports the provided floppy disk drive ribbon cable. After connecting the single end to the board, connect the two plugs on the other end to the floppy drives. (Pin 5 is removed to prevent inserting in the wrong orientation when using ribbon cables with pin 5 plugged).
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

12Volt Cooling Fan Power

Rotation +12V GND
III. INSTALLATION (Connectors)
9. Chassis , CPU , & Power Supply Fan Connectors (3-pin FANPWR) These connectors support cooling fans of 500mAMP (6WATT) or less. Orientate the fans so that the heat sink fins allow airflow to go across the onboard heat sink(s) instead of the expansion slots. Depending on the fan manufacturer, the wiring and plug may be different. The red wire should be positive, while the black should be ground. Connect the fans plug to the board taking into consideration the polarity of the this connector.
TIP: If the case-mounted LED does not light, try reversing the 2-pin plug.
10. IrDA / Fast IR-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

+5V FIRRX IRRX GND IRTX

Back View

IRTX GND IRRX

+5V FIRRX

Infrared Module Connector

For the infrared feature to be available, you must connect the optional Infrared (IrDA) module to the motherboard

ATX Power Connector

+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. IMPORTANT: Be sure that the ATX power supply can take at least 10mAmp load on the 5volt standby lead (5VSB). You may experience difficulty in powering on your system without this.
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.
+5 Volt Standby (No Connection)

Ground

IMPORTANT: Requires an ATX power supply with at least 720ma +5 volt standby power
13. Message LED Lead (MSG LED) This indicates whether a message has been received from a fax/modem. The LED will remain lit when there is no signal and blink when there is data transfer or waiting in the inbox. This function requires OS and driver support. 14. 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 instantly decreased to save electricity and expand the life of certain components when the system is not in use. This 2-pin connector (see the figure below) connects to the case-mounted suspend switch. If you do not have a switch for the connector, you may use the Turbo Switch since it does not have a function. SMI is activated when it detects a short to open moment and therefore leaving it shorted will not cause any problems. May require one or two pushes depending on the position of the switch. Wake-up can be controlled by settings in the BIOS but the keyboard will always allow wakeup (the SMI lead cannot wake-up the system). If you want to use this connector, Suspend Switch in the Power Management Setup of the BIOS SOFTWARE section should be on the default setting of Enable. 15. ATX Power Switch / Soft Power Switch (PWR SW) The system power is controlled by a momentary switch connected to this lead. Pushing the button once will switch the system between ON and SLEEP. Pushing the switch while in the ON mode for more than 4 seconds will turn the system off. The system power LED shows the status of the systems power. 16. 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 in order to prolong the life of the systems power supply. 17. System Power LED (PWR LED) 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. 18. Keyboard Lock Switch Lead (KEYLOCK) This 2-pin connector connects to the case-mounted key switch to allow keyboard locking. 19. Speaker Connector (SPEAKER) This 4-pin connector connects to the case-mounted speaker.

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.

A section at the lower right of the screen displays the control keys you can use. Take note of these keys and their respective uses. If you need information on a particular entry, highlight it and then press <F1>. A pop-up help menu will appear to provide you with the information you need. <F5> loads the last set values, <F6> and <F7> loads the BIOS default values and Setup default values, respectively. IV. BIOS (BIOS Features) 41 NOTE: SETUP Defaults are noted in parenthesis next to each function heading.
Details of BIOS Features Setup
CPU Internal Core Speed This function is reserved for future use and is currently disabled. Virus Warning (Disabled) This field protects the boot sector and partition table of your hard disk against accidental modifications. Any attempt to write to them will cause the system to halt and display a warning message. If this occurs, you can either allow the operation to continue or use a bootable virus-free floppy disk to restart and investigate your system. This setting is recommended because of conflicts with new operating systems. Installation of new operating systems require that you disable this to prevent write errors.
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

IV. BIOS (Hard Disk Detect)
IMPORTANT: If your hard disk was already formatted on an older previous system, incorrect parameters may be detected. You will need to enter the correct parameters manually or use low-level format if you do not need the data stored on the hard disk. If the parameters listed differ from the ones used when the disk was formatted, the disk will not be readable. If the auto-detected parameters do not match the ones that should be used for your disk, do not accept them. Press <N> to reject the presented settings and enter the correct ones manually from the Standard CMOS Setup screen.

Save & Exit Setup

Select this option to save into the CMOS memory all modifications you specified during the current session. To save the configuration changes, highlight the Save & Exit Setup option on the main screen, type Y, and then press <Enter>.

Exit Without Saving

Select this option to exit the Setup utility without saving the modifications you specify during the current session. To exit without saving, highlight the Exit Without Saving option on the main screen and then press <Enter>.
IV. BIOS (Save & Exit)

V. DESKTOP MANAGEMENT

Desktop Management Interface (DMI)
Introducing the ASUS DMI Configuration Utility
This motherboard supports DMI within the BIOS level and provides a DMI Configuration Utility to maintain the Management Information Format Database (MIFD). DMI is able to auto-detect and record information pertinent to a computers system such as the CPU type, CPU speed, and internal/external frequencies, and memory size. The onboard BIOS will detect as many system information as possible and store those collected information in a 4KB block in the motherboards Flash EPROM and allow the DMI to retrieve data from this database. Unlike other BIOS software, the BIOS on this motherboard uses the same technology implemented for Plug and Play to allow dynamic real-time updating of DMI information versus creating a new BIOS image file and requiring the user to update the whole BIOS. This DMI Configuration Utility also allows the system integrator or end user to add additional information into the MIFD such as serial numbers, housing configurations, and vendor information. Those information not detected by the motherboard BIOS and has to be manually entered through the DMI Configuration Utility and updated into the MIFD. This DMI Configuration Utility provides the same reliability as PnP updating and will prevent the refreshing failures associated with updating the entire BIOS.

System Requirements

The DMI Configuration Utility (DMICFG.EXE) must be used in real mode in order for the program to run, the base memory must be at least 180K. Memory managers like HIMEM.SYS (required by windows) must not be installed. You can boot up from a system diskette without AUTOEXEC.BAT and CONFIG.SYS files, REM HIMEM.SYS in the CONFIG.SYS, or press <F5> during bootup to bypass your AUTOEXEC.BAT and CONFIG.SYS files. V. DMI (DMI Introduction) 56 ASUS P2L97 Users Manual

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.

Expansion Slots/Sockets

1) 2) 3) 4) 5) 6) System Memory DIMM Sockets SEC CPU Slot SLOT1, SLOT2 PCI1, PCI2, PCI3, PCI4 AGP

Connectors

1) PS2KBMS 2) PS2KBMS 3) PRINTER 4) COM1, COM2 5) FLOPPY 6) USB 7) PRIMARY/SECOND. IDE 8) IDELED 9) CHA_, CPU_, PWR_FAN 10) IR 11) ATXPWR 12) WOL_CON 13) NARROW/WIDE SCSI 14) TB LED (PANEL) 15) SMI (PANEL) 16) PWR (PANEL) 17) RESET (PANEL) 18) KEYLOCK (PANEL) 19) KEYLOCK (PANEL) 20) SPEAKER (PANEL) 21) CHASSIS
The onboard hardware monitor uses the address 290H-297H so legacy ISA cards must not use this address otherwise conflicts will occur. PCI slot 4 share the same interrupt number (INT#) as the optional onboard SCSI so PCI slot 4 card must be able to share an INT# or make sure that it does not use an INT# at all. Optional

Installation Steps

Before using your computer, you must complete the following steps: 1. 2. 3. 4. 5. 6. Set Jumpers Install DRAM Modules Install the Central Processing Unit (CPU) Install Expansion Cards Connect Ribbon Cables, Cabinet Wires, and Power Supply Setup the BIOS Software

1. Jumpers

Several hardware settings are made through the use of jumper caps to connect jumper pins (JP) on the motherboard. See motherboard layout on page 10 for locations of jumpers. The jumper settings will be described numerically such as [----], [1-2], [2-3] for no connection, connect pins 1&2, and connect pins 2&3 respectively. Pin 1 for our motherboards is always on top or on the left when holding the motherboard with the keyboard connector away from yourself. A 1 is written besides pin 1 on jumpers with three pins. The jumpers will also be shown graphically such as to connect pins 1&2 and to connect pins 2&3. Jumpers with two pins will be shown as for Short (On) and for Open (Off). For manufacturing simplicity, the jumpers may be sharing pins from other groups. Use the diagrams in this manual instead of following the pin layout on the board. Settings with two jumper numbers require that both jumpers be moved together. To connect the pins, simply place a plastic jumper cap over the two pins as diagramed.
III. INSTALLATION Jumpers PB
WARNING! Computer motherboards and expansion cards contain very delicate Integrated Circuit (IC) chips. To protect them against damage from static electricity, you should follow some precautions whenever you work on your computer. 1. Unplug your computer when working on the inside. 2. Use a grounded wrist strap before handling computer components. If you do not have one, touch both of your hands to a safely grounded object or to a metal object, such as the power supply case. 3. Hold components by the edges and try not to touch the IC chips, leads or connectors, or other components. 4. Place components on a grounded antistatic pad or on the bag that came with the component whenever the components are separated from the system.

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.

Lock holes

Captive nut
2. Mount the Heatsink: Place the SEC cartridge face down on a flat surface and lay the heatsink flush on the back (metal side) of 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. IMPORTANT: The heatsinks must not be more than 2.8 cm (1.1 inch) thick. 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.

Assigning DMA Channels for ISA Cards
Some ISA cards, both legacy and PnP, may also need to use a DMA (Direct Memory Access) channel. DMA assignments for this motherboard are handled the same way as the IRQ assignment process described earlier. You can select a DMA channel in the PCI and PnP configuration section of the BIOS Setup utility. IMPORTANT: To avoid conflicts, reserve the necessary IRQs and DMAs for legacy ISA cards (under PNP AND PCI SETUP of the BIOS SOFTWARE, choose Yes in IRQ xx Used By ISA and DMA x Used By ISA for those IRQs and DMAs you want to reserve).
ISA Cards and Hardware Monitor
The onboard hardware monitor uses the address 290H-297H so legacy ISA cards must not use this address or else conflicts will occur.
This motherboard provides an accelerated graphics port (AGP) slot to support a new generation of graphics cards with ultra-high memory bandwidth, such as the ASUS AGP-V264GT3 and ASUS AGP-V3000.

ASUS AGP-V264GT3

ASUS AGP-V3000
Accelerated Graphics Port (AGP)

III. INSTALLATION AGP

5. External Connectors
WARNING! Some pins are used for connectors or power sources. Placing jumper caps over these will cause damage to your motherboard. IMPORTANT: Ribbon cables should always be connected with the red stripe on the Pin 1 side of the connector. The four corners of the connectors are labeled on the motherboard. Pin 1 is the side closest to the power connector on hard drives and floppy drives. IDE ribbon cable must be less than 18in. (46cm), with the second drive connector no more than 6in. (15cm) from the first connector. 1. PS/2 Keyboard Connector (6-pin Female) This connection is for a standard keyboard using an PS/2 plug (mini DIN). This connector will not allow standard AT size (large DIN) keyboard plugs. You may use a DIN to mini DIN adapter on standard AT keyboards.
III. INSTALLATION Connectors 28
PS/2 Keyboard (6-pin Female)
2. PS/2 Mouse Connector (6-pin Female) The system will direct IRQ12 to the PS/2 mouse if one is detected. If not detected, expansion cards can use IRQ12. See PS/2 Mouse Function Control in BIOS Features Setup of the BIOS SOFTWARE.
PS/2 Mouse (6-pin Female)
3. Parallel Printer Connector (25-pin Female) You can enable the parallel port and choose the IRQ through Onboard Parallel Port in Chipset Features Setup of the BIOS SOFTWARE. NOTE: Serial printers must be connected to the serial port.
Parallel (Printer) Port (25-pin Female)
COM 1 COM 2 Serial Ports (9-pin Male)
5. Floppy Disk Drive Connector (34-1pin FLOPPY) This connector supports the provided floppy disk drive ribbon cable. After connecting the single end to the board, connect the two plugs on the other end to the floppy drives. (Pin 5 is removed to prevent inserting in the wrong orientation when using ribbon cables with pin 5 plugged).
Pin 1 NOTE: Orient the red stripe to Pin 1

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.

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

Auto detection of hard disks on bootup For each field: Primary Master, Primary Slave, Secondary Master, and Secondary Slave, you can select Auto under the TYPE and MODE fields. This will enable auto detection of your IDE hard disk during bootup. This will allow you to change your hard disks (with the power off) and then power on without having to reconfigure your hard disk type. If you use older hard disks that do not support this feature, then you must configure the hard disk in the standard method as described earlier by the User option.
NOTE: After the IDE hard disk drive information has been entered into BIOS, new IDE hard disk drives must be partitioned (such as with FDISK) and then formatted before data can be read from and write on. Primary IDE hard disk drives must have its partition set to active (also possible with FDISK).
NOTE: SETUP Defaults are noted in parenthesis next to each function heading. Drive A / Drive B (None) These fields record the types of floppy disk drives installed in your system. The available options for drives A and B are: 360KB, 5.25 in.; 1.2MB, 5.25 in.; 720KB, 3.5 in.; 1.44MB, 3.5 in.; 2.88MB, 3.5 in.; None IV. BIOS Standard CMOS 44 To enter the configuration value for a particular drive, highlight its corresponding field and then select the drive type using the left- or right-arrow keys. Floppy 3 Mode Support (Disabled) This is the Japanese standard floppy drive. The standard stores 1.2MB in a 3.5inch diskette. This is normally disabled but you may choose from either: Drive A, Drive B, Both, and Disabled Video (EGA/VGA) Set this field to the type of video display card installed in your system. The options are EGA/VGA, CGA 49, CGA 80, and Mono (for Hercules or MDA). If you are using a VGA or any higher resolution card, choose EGA/VGA. Halt On (All Errors) This field determines which types of errors will cause the system to halt. Choose from All Errors; No Errors; All,But Keyboard, All,But Diskette; and All,But Disk/Key.

BIOS Features Setup

The BIOS Features Setup option consists of configuration entries that allow you to improve your system performance, or let you set up some system features according to your preference. Some entries are required by the motherboards design to remain in their default settings.
A section at the lower right of the screen displays the control keys you can use. Take note of these keys and their respective uses. If you need information on a particular entry, highlight it and then press <F1>. A pop-up help menu will appear to provide you with the information you need. <F5> loads the last set values, <F6> and <F7> loads the BIOS default values and Setup default values, respectively. IV. BIOS BIOS Features 45 NOTE: SETUP Defaults are noted in parenthesis next to each function heading.

Details of BIOS Features Setup
CPU Internal Core Speed This function is reserved for future use and is currently disabled. Boot Virus Detection (Enabled) This field allows you to set boot virus detection, ensuring a virus-free boot sector. This new antivirus solution is unlike native BIOS tools, which offer limited virus protection typically by write-protecting the partition table. With this new solution, your computer is protected against boot virus threats earlier in the boot cycle, that is, before they have a chance to load into your system. This ensures your computer boots to a clean operating system. The system halts and displays a warning message when it detects a virus. If this occurs, you can either allow the operation to continue or use a virus-free bootable floppy disk to restart and investigate your system. Because of conflicts with new operating systems, for example, during installation of new softwares, you may have to set this to Disabled to prevent write errors.
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. CPU Level 2 Cache ECC Check (Disabled) This function controls the ECC check capability in the CPU level 2 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. Quick Power On Self Test (Enabled) This field speeds up the Power-On Self Test (POST) routine by skipping retesting a second, third, and fourth 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 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 (A,C) This field determines where the system looks first for an operating system. Options are A,C; A,CDROM,C; CDROM,C,A; D,A; E,A; F,A; C only; LS/ZIP, C; and C,A. The setup default setting, A,C, is to check first the floppy disk and then the hard disk drive. 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. 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. 46 ASUS P2L97-DS Users Manual

Load Setup Defaults

The Load Setup Defaults option allows you to load the default values to the system configuration fields. These default values are the optimized configuration settings for the system. To load these default values, highlight Load Setup Defaults on the main screen and then press <Enter>. The system displays a confirmation message on the screen. Press <Y> and then <Enter> to confirm. Press <N> and then <Enter> to abort. This feature does not affect the fields on the Standard CMOS Setup screen.
IV. BIOS Load Defaults 56 ASUS P2L97-DS Users Manual
Supervisor Password and User Password
These two options set the system passwords. Supervisor Password sets a password that will be used to protect the system and the Setup utility; User Password sets a password that will be used exclusively on the system. By default, the system comes without any passwords. To specify a password, highlight the type you want and then press <Enter>. A password prompt appears on the screen. Taking note that the password is case sensitive, and can be up to 8 alphanumeric characters long, type in your password and then press <Enter>. The system confirms your password by asking you to type it again. After setting a password, the screen automatically reverts to the main screen.
To implement password protection, specify in the Security Option field of the BIOS Features Setup screen when the system will prompt for the password. If you want to disable either password, press <Enter> instead of entering a new password when the Enter Password prompt appears. A message confirms the password has been disabled.
NOTE: If you forget the password, see Clear Time Clock (Jumpers) in section III for procedures on clearing the CMOS.

IV. BIOS Passwords

IDE HDD Auto Detection
This IDE HDD Auto Detection option detects the parameters of an IDE hard disk drive, and automatically enters them into the Standard CMOS Setup screen.
Up to four IDE drives can be detected, with parameters for each listed inside the box. To accept the optimal entries, press <Y> or else select from the numbers displayed under the OPTIONS field (2, 1, 3 in this case); to skip to the next drive, press <N>. If you accept the values, the parameters will appear listed beside the drive letter on the screen. The process then proceeds to the next drive letter. Pressing <N> to skip rather than to accept a set of parameters causes the program to enter zeros after that drive letter. Remember that if you are using another IDE controller that does not feature Enhanced IDE support for four devices, you can only install two IDE hard disk drives. Your IDE controller must support the Enhanced IDE features in order to use Drive E and Drive F. The onboard PCI IDE controller supports Enhanced IDE, with two connectors for connecting up to four IDE devices. If you want to use another controller that supports four drives, you must disable the onboard IDE controller in the Chipset Features Setup screen. When auto-detection is completed, the program automatically enters all entries you accepted on the field for that drive in the Standard CMOS Setup screen. Skipped entries are ignored and are not entered in the screen. If you are auto-detecting a hard disk that supports the LBA mode, three lines will appear in the parameter box. Choose the line that lists LBA for an LBA drive. Do not select Large or Normal. The auto-detection feature can only detect one set of parameters for a particular IDE hard drive. Some IDE drives can use more than one set. This is not a problem if the drive is new and empty.

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 *** will appear on the right for menu items that has been modified by the user.

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. 62 ASUS P2L97-DS Users Manual

VI. ADAPTEC SCSI SELECT

Access the SCSI BIOS by holding down both CTRL and A keys when you see the BIOS banner message listing the driver name and the attached devices. For example: Adaptec AIC-7890 Ultra/Wide W BIOS v1.24 (c) 1998 Adaptec, Inc. All Rights Reserved. <<< Press <Ctrl><A> for SCSISelect(TM) Utility! >>> The SCSISelect screen will come up. Instructions on how to move the cursor and select options are listed on the bottom of the program windows. VI. SCSI SELECT Configuring SCSI 63
Configuring the SCSI Adapter

SCSI Disk Utilities

The SCSI Disk Utilities option displays information on SCSI IDs 0 though 15, listing all devices on the bus including non-disk devices. When you select a device from the list and press Enter key, another window appears giving you the option of selecting one of two sub-utilities, Format Disk or Verify Media. These utilities are used for hard disk drives only and will have no effect on other non-disk SCSI devices. Format Disk - is a SCSI low-level formatting utility. In general, SCSI hard drive have already been low-level formatted when you get them, so you generally should not need to use this function. Verify Media - scans the selected drive media for defects, notifies you of any found and gives you the option of reassigning bad blocks so that data will not be written to them. This is only necessary if you suspect that your SCSI disk drive has a problem.

VII. EZ-SCSI UTILITY Troubleshooting
If I am running under Windows95, do I need lines for the Adaptec real mode ASPI drivers and mscdex in my config.sys and autoexec.bat files? Usually, you do not need to use these real mode ASPI drivers, because the new Windows miniport drivers support most SCSI host adapters and SCSI devices. However, you need to load the drivers (including mscdex, if you have a CDROM drive) if any of the following is true:
You are running in MSDOS mode You are using a scanner or another SCSI device with config.sys- or autoexec.bat
based drivers, such as HPs sjiix.sys You have an older model SCSI-1 CDROM drive that Windows95 does not support You are using a CD-Recorder drive (however, some newer models of CDRecorder drives can use the embedded Windows miniport drivers)
VII. EZ-SCSI UTILITY Troubleshooting 68
To install the Adaptec EZSCSI DOS drivers, click the Start button and select Restart the computer in MS-DOS mode. When the DOS prompt appears, follow the Quick Start instructions for DOS.
My CDROM drive doesnt work properly under Windows95. Some older models of SCSI CDROM drives are not compatible with the embedded Windows95 CDROM driver. You can add support for the CDROM drive by doing the following: 1 Click the Start button and select Restart the computer in MS-DOS mode. 2 When the DOS prompt appears, follow the Quick Start instructions for DOS. 3 When you are finished running Adaptec EZSCSI for DOS, find the file named cdtsd.vxd in the windows\system\iosubsys directory and rename it cdtsd.sav. My CDROM drive shows up as more than one icon under My Computer. The mapping between mscdex, which runs in real mode, and the Windows95 CDROM driver does not match. You can correct this in one of two ways:
Comment out the line that loads mscdex.exe in the autoexec.bat file. Change the /L switch on the line that loads mscdex.exe in the autoexec.bat file
so it assigns the CDROM drive the next highest logical drive letter after the hard disk drives.
Information for DOS/Windows 3.1x Users
The following information may be useful if you install Adaptec EZSCSI on a computer running DOS, Windows 3.1x, or Windows for Workgroups3.1x. NOTE: The Windows95/WindowsNT Troubleshooting section on page 6 describes a few situations when you may need to use the DOS/Windows3.1x drivers and ASPI managers under Windows95 or WindowsNT.

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.