2Mbit Flash EEPROM (Programmable BIOS)
ISA Slot 2 NOTE: Greyed components are optional at the time of purchase.

Jumpers

1) 2) 3) 4) 5) 6) 7) CLRTC KBPWR LAN_EN SCSI_EN COMBINE FS0, FS1, FS2 BF0, BF1, BF2, BF3 p. 13 p. 13 p. 14 p. 14 p. 14 p. 15 p. 15 Clear Real Time Clock (RTC) RAM Keyboard Power Up (Enable/Disable) Onboard LAN Setting (Enable/Disable) Onboard SCSI Setting (Enable/Disable) IDE+SCSI LED Activity Light (Separated/Combined) CPU Bus Frequency CPU Core:Bus Frequency Multiple

Expansion Slots/Sockets

1) 2) 3) 4) 5) DIMM Sockets SEC CPU Slot SLOT1, SLOT2 PCI1, PCI2, PCI3, PCI4 AGP p. 18 p. 19 p. 24 p. 25 p. 25 DIMM Memory Support Single Edge Contact CPU Support 16-bit ISA Bus Expansion Slots* 32-bit PCI Bus Expansion Slots Accelerated Graphics Port

1) TRCPU

p. 22 CPU heat Sensor Connector

Connectors

1) PS2KBMS 2) PS2KBMS 3) PRINTER 4) COM1/COM2 5) RJ-45 6) USB 7) A 8) FLOPPY 9) Primary/Secondary IDE 10) IDELED/SCSILED 11) SCSI-50/SCSI-68/ULTRA2-68 12) IR 13) SBLINK 14) TB LED (PANEL) 15) SMI (PANEL) 16) PWR (PANEL) 17) RESET (PANEL) 18) KEYLOCK (PANEL) 19) KEYLOCK (PANEL) 20) SPEAKER (PANEL) 21) CHASSIS 22) CHA_/CPU_/PWR_FAN 23) ATXPWR
p. 26 p. 26 p. 27 p. 27 p. 27 p. 28 p. 28 p. 28 p. 29 p. 29 p. 30 p. 31 p. 31 p. 32 p. 32 p. 32 p. 32 p. 32 p. 32 p. 32 p. 33 p. 33 p. 34
PS/2 Keyboard Connector (6-pin female) PS/2 Mouse Connector (6-pin female) Parallel (Printer) Port Connector (25-pin female) Serial Port COM1/COM2 (two 9-pin male) RJ-45 Connector (8-pin female) Universal Serial BUS Ports 1 & 2 (two 4 pin female) LAN Condition Connector (6 pins) Floppy Drive Connector (34-1 pins) Primary/Secondary IDE Connector (40 pins) IDE/SCSI LED Activity Light (two 2 pins) Ultra-Fast (50)/Wide (68)/Ultra2 (68) SCSI Connectors Infrared Port Module Connector (5 pins) SB-LINK Connector (6-1 pins) Message LED Lead (2 pins) SMI Suspend Switch Lead (2 pins) ATX Power Switch / Soft Power Switch (2 pins) Reset Switch Lead (2 pins) System Power LED (3 pins) Keyboard Lock Switch Lead (2 pins) Speaker Connector (4 pins) Chassis Open Alarm Lead (4-1 pins) Chassis/CPU/Power Supply Fan Connectors (3 pins) ATX Motherboard Power Connector (20 pins)

CPU Bus Frequency

P2B-L/S/LS CPU Settings
WARNING! Frequencies above 100Mhz exceed the specifications for the onboard Intel Chipset and are not guaranteed to be stable.
Intel Pentium II Processor in an SEC Cartridge (233-450MHz)
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 Intel Pentium II Intel Pentium II Intel Pentium II Freq. 450MHz 400MHz 350MHz 333MHz 300MHz 266MHz 233MHz Ratio 4.5x 4.0x 3.5x 5.0x 4.5x 4.0x 3.5x BUS F. 100MHz 100MHz 100MHz 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] [2-3] [1-2] [1-2] [2-3] [1-2] [1-2] [2-3] [1-2] [1-2] [2-3] [1-2] [1-2] BF3 [2-3] [2-3] [2-3] [2-3] [2-3] [2-3] [2-3] (Freq. Ratio) BF2 BF1 BF0 [1-2] [2-3] [1-2] [1-2] [2-3] [2-3] [2-3] [1-2] [1-2] [1-2] [1-2] [2-3] [1-2] [2-3] [1-2] [1-2] [2-3] [2-3] [2-3] [1-2] [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.
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2. System Memory (DIMM)

This motherboard uses only Dual Inline Memory Modules (DIMMs). Sockets are available for 3.3Volt (power level) unbuffered Synchronous Dynamic Random Access Memory (SDRAM). One side (with memory chips) of the DIMM takes up one row on the motherboard. To utilize the chipsets Error Checking and Correction (ECC) feature, you must use a DIMM module with 9 chips per side (standard 8 chips/side + 1 ECC chip) and make the proper settings through Chipset Features Setup in IV. BIOS SOFTWARE. Memory speed setup is recommended through SDRAM Configuration under Chipset Features Setup. IMPORTANT: SDRAMs used must be compatible with the current Intel PC100 SDRAM specification. Install memory in any combination as follows:
DIMM Location Socket 1 (Rows 0&1) Socket 2 (Rows 2&3) Socket 3 (Rows 4&5) Socket 4 (Rows 6&7) 168-pin DIMM SDRAM 8, 16, 32, 64, 128, 256MB SDRAM 8, 16, 32, 64, 128, 256MB SDRAM 8, 16, 32, 64, 128, 256MB SDRAM 8, 16, 32, 64, 128, 256MB x1 x1 x1 x1 Total Memory
Total System Memory (Max 1024MB) =
ASUS Memory Module Example:
SDRAM DIMM (8 chips, Non-ECC)
General DIMM Notes Use only PC100-compliant DIMMs. This motherboard operates at 100MHz, thus most systems will not even boot if non-compliant modules are used because of the strict timing issues involved under this speed. Two possible memory chips are supported: SDRAM with and without ECC. SDRAM chips are generally thinner with higher pin density than traditional EDO (Extended Data Output) chips. BIOS shows SDRAM memory on bootup screen. 8 chips/side modules do not support ECC, only 9 chips/side modules support ECC. Single-sided DIMMs come in 16, 32, 64,128MB and double-sided DIMMs come in 32, 64, 128, 256MB sizes.

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-V2740 3D Multimedia Accelerator.
P2B-L/S/LS 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 46cm(18in), with the second drive connector no more than 15cm (6in) from the first connector. 1. PS/2 Keyboard Connector (6-pin Female) This connection is for a standard keyboard using a 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
P2B-L/S/LS 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.
P2B-L/S/LS 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.
P2B-L/S/LS Parallel Port (25-pin Female)
COM 1 P2B-L/S/LS Serial Ports (9-pin Male)
5. RJ-45 Connector (8-pin Female) This connector can be used to connect the onboard 32-bit 10/100 Mbps Ethernet LAN Controller (optional) to a host or a hub.

P2B-L/S/LS RJ-45 Port

IV. BIOS Updating BIOS 38

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 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.

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. 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.... 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. 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. IV. BIOS BIOS Features 45 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. Security Option (Setup) 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. System prompts for the User Password every time you start your system. Setup prompts for the Supervisor Password only when entering the BIOS Setup utility.

Other CD Directories

\AFLASH: Utility for updating your motherboards BIOS. \DMI: Installs the Desktop Management Interface utility for viewing or updating system information. \LAN: Drivers are provided for installing network on various systems. \PCCILLIN: Installs the PC-cillin virus protection software. View the online help if you have any questions.
V. SUPPORT S/W ASUS Smart Motherbaord

VI. DMI Utility

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. VI. DMI Utility Using DMI Utility 60

System Requirements

The DMI Configuration Utility (DMICFG2.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.
Using the ASUS DMI Configuration Utility
NOTE: The following screen displays are provided as examples only and may not reflect the screen contents on your system. Edit DMI (or delete) VI. DMI Utility Using DMI Utility 61
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.

Link Indicator: This connects to an LED to monitor 10Base-T and 100Base-TX connections. The LED lights to indicate a successful network connection, and remains steady if the connection is stable. If this indicator is off, the cable connection between the hub and the computer may be faulty or the driver configuration may be faulty. Activity Indicator: This connects to an LED to monitor network activity. The LED lights when there are network packets sent or received through the RJ45 port. The rate of flashing is proportional to the amount of network traffic. If this is off, the computer is not sending or receiving network data. Speed Indicator: This connects to an LED to monitor connection speed. The LED lights (On) when connection is made to a 100Base-TX host. If Off, the network connection is operating at 10Mbps.
VII. NETWORK Layout/Installation 64

Network Cable Connection

Twisted Pair Ethernet (TPE) - Connect a single network cable to the RJ45 connector. For 100BASE-TX, your network cable must be category 5 (not category 3), twistedpair wiring with RJ45 connectors. If you plan on running the interface at 100 Mbps, it must be connected to a 100BASE-TX hub (not a 100BASE-T4 hub). For 10BASE-T, use category 3, 4, or 5 twisted-pair wiring.

Twisted-Pair Cable

The cable used to connect the Ethernet card to a host (generally a Hub) is called a straight-through twisted-pair. The end connectors are called RJ45 connectors, which are not compatible with the standard RJ11 telephone connectors. The illustration shows a connection between a typical Hub and this motherboards network interface.

Straight-Through Cable

Hub 1 IRD+ 2 IRD3 OTD+ 6 OTDCard 1 OTD+ 2 OTD3 IRD+ 6 IRD-

Motherboard

Uplink

12345678

RJ45 Connector
Pin 1 Pin 2 Pin 3 Pin 6 Pins 4,5,7,8 Output Transmit Data + Output Transmit Data Input Receive Data + Input Receive Data (Reserved)

HUB RJ45 Connector

DOS and Windows 3.1 Setup for Novell
Automatic configuration Some computers automatically detect and configure adapters and interfaces while booting. The network interfaces IRQ level and I/O memory address of this motherboard are automatically set by the BIOS each time you start your computer. Start your computer to automatically configure the network interface. Configuration is complete when the DOS prompt appears. You can now continue with the procedure below. If your computer displays an error while booting, it may require additional steps. Run Setup to install network drivers Setup can automatically install NetWare DOS ODI client drivers for you or display a README file with installation instructions for other NOS drivers. 1. If your computer already has network drivers installed, restart the computer without loading them. If the drivers are loaded from the AUTOEXEC.BAT or CONFIG.SYS file, type REM in front of each line that loads a network driver. Or, with DOS 6.x or later press F5 as DOS starts, to bypass the drivers. 2. Insert the ASUS Configuration and Drivers disk in a floppy drive, switch to that drive, and at the DOS prompt, type SETUP. 3. If you have another network adapter in your computer, an adapter selection menu appears on the screen. Select the adapter you want by noting the Ethernet address. 4. Select Automatic Setup from the Main menu. Then follow the instructions on the screen. (If you want to test the interface with a responder on the network, see the next procedure.) Setup displays the configuration, then runs a series of diagnostic tests that makes sure the network interface or adapter and network are functioning properly. If Setup finds a problem, it displays the results and some possible solutions. 5. When Setup finishes the tests, youll see the Install Network Drivers screen. 6. Select the driver you want to install. Setup can install a NetWare client driver for you. If youre installing other drivers, Setup displays a README file with installation instructions.

VII. NETWORK DOS/Windows 3.1
Troubleshooting If you cant connect to a server, first try the suggestions here, then turn to the Troubleshooting section if necessary. VII. NETWORK DOS/Windows 3.1/NT 66 Make sure youre using the drivers for this interface. The driver filename contains the letter B (for example, E100BODI.COM). If youre replacing an existing adapter, make sure the LINK statement in your NET.CFG is correct for the new interface or adapter. For example, the LINK statement for a NetWare client should be: LINK DRIVER E100BODI Verify that the frame type in your NET.CFG file matches your network. If setting up a server, check your LOAD and BIND statements. Test the interface by running diagnostics in Setup. Additional testing is available by using a responder. Check the README files.
Responder testing on the network (optional) Setup can test the interface more thoroughly if you have a responder on the network while running the tests. 1. Go to a computer on the network with any EtherExpress adapter or interface installed (except EtherExpress 32 or EtherExpress 16 MCA). 2. Run the appropriate configuration program for the installed interface and set it up as a responder. 3. Return to the computer with the new adapter or interface. Run Setup and make the new interface the sender. Test the interface.
Windows NT Server or Workstation
Automatic configuration Some computers automatically detect and configure adapters or interfaces while booting. The network interfaces IRQ level and I/O address are automatically set by the BIOS each time you start your computer. Start your computer to automatically configure the network interface. Configuration is complete when Windows NT starts or the DOS prompt appears. If your computer displays an error while booting, it may require additional steps to configure. Install network drivers - Windows NT Version 4.0 only After starting Windows NT, you need to install the device drivers. Have the Windows NT CD-ROM disk available for this procedure.
NOTE: If you are installing Windows NT 4.0 at this time, click the Start Search button when the network network interface or adapter installation window appears. This allows NT to autodetect the network interface or adapter. You may then skip steps 1 - 4 below. 1. 2. 3. 4. Double-click the Network icon in the Control Panel. Click the Adapters tab in the window that appears. Click Add. A list of network interface or adapter appears. Select Intel EtherExpress PRO Adapter and click OK.
Install network drivers - Windows NT Version 3.5x only. After setting up the network interface and starting Windows NT, you need to install the Intel drivers and test the network interface or adapter. 1. Double-click the Network icon in the Control Panel. 2. Click Add Adapter. 3. When the list of adapters appears, scroll to the end of the list and select <Other> Requires disk from manufacturer. 4. Insert the ASUS Configuration and Drivers disk in the A: drive and click OK. 5. Select the Intel EtherExpress PRO Adapter and click OK. 6. Click OK in the Network Settings dialog box and remove the installation disk. When prompted, restart Windows NT. To install multiple network interface or adapters, repeat this procedure for each new network interface or adapter. Troubleshooting If Windows NT reports an error or you cant connect to the network, try the suggestions here first, then turn to the Troubleshooting section if necessary. Make sure youre using the drivers for this network interface or adapter. Drivers are located on the Windows NT CD-ROM or on the ASUS Drivers and Configuration disk. Make sure the driver is loaded and the protocols are bound. Check the Network Bindings dialog box in Windows NT. Check the Windows NT Event Viewer for error messages. If you are attaching to a NetWare network, check your frame type and verify that NetWare client software has been installed. Check with your LAN administrator you may need to install supplemental networking software.

Technical Information

Fast Ethernet Wiring
100BASE-TX Specification: The 100BASE-TX specification supports 100 Mbps transmission over two pairs of category 5 twisted-pair Ethernet (TPE) wiring. One pair is for transmit operations and the other for receive operations. Segment lengths are limited to 100 meters with 100BASE-TX for signal timing reasons. This complies with the EIA 568 wiring standard.
VII. NETWORK Technical Information 74
Fast Ethernet Hubs and Switches
The two basic types of hubs are shared hubs and switching hubs. This motherboards network interface can be used with either type of hub for 10 Mbps. At 100 Mbps, a TX hub or switch is required.

Shared hubs

In a shared network environment, computers are connected to hubs called repeaters. All ports of the repeater hub share a fixed amount of bandwidth, or data capacity. On a 100 Mbps shared hub, all nodes on the hub must share the 100 Mbps of bandwidth. As stations are added to the hub, the effective band-width available to any individual station gets smaller. Shared hubs do not support full duplex. Think of a shared repeater hub as a single-lane highway that everyone shares. As the number of vehicles on the highway increases, the traffic becomes con-gested and transit time increases for individual cars. On a shared hub all nodes must operate at the same speed, either 10 Mbps or 100 Mbps. Fast Ethernet repeaters provide 100 Mbps of available bandwidth, ten times more than whats available with a 10BASE-T repeater. Repeaters use a well-established, uncomplicated design, making them highly cost effective for connecting PCs within a workgroup. These are the most common type of Ethernet hubs in the installed base.

Switching hubs

In a switched network environment, each port gets a fixed, dedicated amount of bandwidth. In the highway scenario, each car has its own lane on a multi-lane highway and there is no sharing. In a switched environment, data is sent only to the port that leads to the pro-per destination station. Network bandwidth is not shared among all stations, and each new station added to the hub gets access to the full bandwidth of the network. If a new user is added to a 100 Mbps switching hub, the new station receives its own dedicated 100 Mbps link and doesnt impact the 100 Mbps bandwidth of another station. Switching hubs can effectively increase the overall bandwidth available on the network, significantly improving performance. Switching hubs can also support full duplex.

SCSI Disk Utilities

VIII. SCSI SELECT Configuring SCSI 77 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 - low-level formats your SCSI hard disks. In general, SCSI hard disks have already been low-level formatted when you get them, so you generally do not need to use this function. Verify Media - scans the selected drive media for defects, notifies you of any defects found and gives you the option of reassigning bad blocks so that data will not be written to them. This utility is only necessary if you suspect that your SCSI disk drive has a problem.
IX. ADAPTEC EZ-SCSI UTILITY
Welcome to Adaptec EZSCSIVI, ADAPTEC EZ-SCSI UTILITY. Adaptec EZSCSI gives you what you need to use your SCSI devices most effectively with DOS, Windows 3.1x, or Windows for Workgroups 3.1x.

Quick Start Instructions

First, install SCSI devices (see the hardware documentation for details). Then follow the instructions for your operating system software in one of the following sections. We recommend that after you install Adaptec EZSCSI you run SCSITutor to learn more about the features of SCSI.

Windows95 or WindowsNT

If you want to install Windows95 or WindowsNT on a new computer system, you may not be able to access your SCSI CDROM drive at first. (Usually, you install Windows95 and WindowsNT from a CDROM disc.) To gain access to your CDROM drive, follow the DOS Quick Start instructions below.
Windows/Windows for Workgroups 3.1x
1. Install Windows 3.1x or Windows for Workgroups 3.1x and start it running on your computer. 2. Insert the Adaptec EZSCSI Setup Disk into your floppy disk drive. 3. Select File/Run from the Program Manager menu. 4. When the Run dialog box appears, type a:\setup if you are using the A drive or b:\setup if you are using the B drive. Then click OK. 5. Follow the onscreen instructions.
1. Install DOS 6.x or later and start it running on your computer. 2. Insert the Adaptec EZSCSI Setup Disk into your floppy disk drive. 3. At the DOS prompt, type a:\install (assuming your 3.5 floppy is A: drive). Then press <Enter>. 4. Follow the onscreen instructions.
IX. EZ-SCSI UTILITY Intro/Quick Start

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.

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.

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
IX. EZ-SCSI UTILITY Partitioning 86
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.
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This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with manufacturer's instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: Re-orient or relocate the receiving antenna. Increase the separation between the equipment and receiver. Connect the equipment to an outlet on a circuit different from that to which the receiver is connected. Consult the dealer or an experienced radio/TV technician for help.
WARNING! 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. II. III. IV. V. Introduction: Features: Installation: BIOS Software: Support Software: Manual information and checklist Information and specifications concerning this product Instructions on setting up the motherboard Instructions on setting up the BIOS software Information on the included support software 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 (1) Universal Retention Mechanism for SECC/SECC2/SEPP (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 jumper caps (1) Support CD with drivers and utilities (1) Users manual S-P2FAN or P2T-Cable for Slot 1 processors (optional) IrDA-compliant infrared module (optional) ASUS PCI-L101 Wake-on-LAN 10/100 Ethernet Card (optional)

II. FEATURES

Features of the ASUS P2B Motherboard

III. INSTALLATION Jumpers
WARNING! AGP bus frequencies above 66MHz exceed the specifications for the AGP interface and are not guaranteed to be stable.
4. CPU Bus Frequency (FS0, FS1, FS2, FS3) This option tells the clock generator what frequency to send to the CPU, DRAM, and 440BX AGPset. 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). 5. 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.
BF0 BF1 BF2 BF3 BF0 BF1 BF2 BF3 BF0 BF1 BF2 BF3 BF0 BF1 BF2 BF3 BF0 BF1 BF2 BF3

3 2.0x (2/1)

BF0 BF1 BF2 BF3

3 2.5x (5/2)

3 3.0X (3/1)

3 3.5X (7/2)

3 4.0X (4/1)

3 4.5X (9/2)

FS0 FS1 FS2 FS3
3 6.5X (13/2) 7.0X (7/1) 7.5X (15/2) 8.0X (8/1) 5.5x (11/2) 6.0x (6/1) CPU Core:BUS Frequency Multiple
FS0 FS1 FS2 FS3 FS0 FS1 FS2 FS3 FS0 FS1 FS2 FS3 FS0 FS1 FS2 FS3 FS0 FS1 FS2 FS3 FS0 FS1 FS2 FS3 FS0 FS1 FS2 FS3

P2B CPU Settings

66.8MHz 33.4MHz

75MHz 37.5MHz

83.3MHz 41.65MHz

100.3MHz 33.43MHz

103MHz 34.3MHz

105MHz 35MHz

5.0X (5/1)
III. INSTALLATION Jumpers 14

110MHz 36.67MHz

112MHz 37.33MHz

CPU PCI

115MHz 38.33MHz

120MHz 40MHz

124MHz 31MHz

124MHz 41.33MHz

133MHz 33.3MHz

133MHz 44.33MHz

140MHz 35MHz

150MHz 37.5MHz

CPU External Clock (BUS) Frequency Selection
WARNING! Frequencies above 100MHz exceed the specifications for the onboard Intel Chipset and are not guaranteed to be stable. Set the jumpers by the Internal speed of your processor as follows:
Intel CPU Model Pentium II Pentium II Pentium II Pentium II Celeron Pentium II/Celeron Pentium II/Celeron Pentium II/Celeron Pentium II/Celeron Pentium II Freq. 500MHz 450MHz 400MHz 350MHz 400MHz 366MHz 333MHz 300MHz 266MHz 233MHz Mult. 5.0x 4.5x 4.0x 3.5x 6.0x 5.5x 5.0x 4.5x 4.0x 3.5x BUS F. 100MHz 100MHz 100MHz 100MHz 66MHz 66MHz 66MHz 66MHz 66MHz 66MHz (BUS Freq.) FS0 FS1 FS2 FS3 [1-2] [1-2] [1-2] [2-3] [1-2] [1-2] [1-2] [2-3] [1-2] [1-2] [1-2] [2-3] [1-2] [1-2] [1-2] [2-3] [1-2] [1-2] [1-2] [1-2] [1-2] [1-2] [1-2] [1-2] [1-2] [1-2] [1-2] [1-2] [2-3] [2-3] [2-3] [2-3] [2-3] [2-3] [2-3] [2-3] [2-3] [2-3] [2-3] [2-3] (Freq. Mult.) BF0 BF1 BF2 BF3 [2-3] [1-2] [1-2] [2-3] [1-2] [2-3] [1-2] [2-3] [2-3] [2-3] [1-2] [2-3] [1-2] [1-2] [2-3] [2-3] [2-3] [1-2] [2-3] [1-2] [2-3] [1-2] [2-3] [1-2] [1-2] [2-3] [2-3] [1-2] [2-3] [1-2] [1-2] [1-2] [1-2] [2-3] [1-2] [2-3] [2-3] [2-3] [2-3] [2-3]
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/Celeron processor because it sends a VID signal directly to the onboard power controller.

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2. System Memory (DIMM)

This motherboard uses only Dual Inline Memory Modules (DIMMs). Three sockets are available for 3.3Volt (power level) unbuffered Synchronous Dynamic Random Access Memory (SDRAM) of either 8, 16, 32, 64, 128 or 256MB to form a memory size between 8MB to 768MB. One side (with memory chips) of the DIMM takes up one row on the motherboard. To utilize the chipsets Error Checking and Correction (ECC) feature, you must use a DIMM module with 9 chips per side (standard 8 chips/side + 1 ECC chip) and make the proper settings through Chipset Features Setup in IV. BIOS SOFTWARE. Memory speed setup is recommended through SDRAM Configuration under Chipset Features Setup. IMPORTANT (see General DIMM Notes below) SDRAMs used must be compatible with the current Intel PC100 SDRAM specification. Install memory in any combination as follows:
DIMM Location Socket 1 (Rows 0&1) Socket 2 (Rows 2&3) Socket 3 (Rows 4&5) 168-pin DIMM SDRAM 8, 16, 32, 64, 128, 256MB SDRAM 8, 16, 32, 64, 128, 256MB SDRAM 8, 16, 32, 64, 128, 256MB x1 x1 x1 Total Memory
Total System Memory (Max 768MB) =
General DIMM Notes Use only PC100-compliant DIMMs. This motherboard operates at 100MHz, thus most
systems will not even boot if non-compliant modules are used because of the strict timing issues involved under this speed. Two possible memory chips are supported: SDRAM with and without ECC. SDRAM chips are generally thinner with higher pin density than EDO (Extended Data Output) chips. BIOS shows SDRAM memory on bootup screen. 8 chips/side modules do not support ECC, only 9 chips/side modules support ECC. Single-sided modules come in 16, 32, 64 ,128MB; double-sided come in 32, 64, 128, 256MB.
III. INSTALLATION System Memory
DIMM Memory Installation Procedures:
Insert the module(s) as shown. Because the number of pins are different on either side of the breaks, the module will only fit in the orientation as shown. DRAM SIMM modules have the same pin contacts on both sides. SDRAM DIMMs have different pin contacts on each side and therefore have a higher pin density.

20 Pins 60 Pins

88 Pins
III. INSTALLATION System Memory 18
P2B 168-Pin DIMM Memory Sockets
The DIMMs must be 3.3Volt unbuffered SDRAMs. To determine the DIMM type, check the notches on the DIMMs (see figure below).
168-Pin DIMM Notch Key Definitions (3.3V)
DRAM Key Position Unbuffered RFU Buffered
Voltage Key Position 5.0V 3.3V Reserved
The notches on the DIMM 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.

3. Central Processing Unit (CPU)
Your motherboard provides a Slot 1 connector for a Pentium II processor packaged in a Single Edge Contact Cartridge (SECC/SECC2) or a Celeron processor packaged in a Single Edge Processor Package (SEPP).
Pentium II processor packaged in an SECC with heatsink and fan (top view)
Pentium II processor packaged in an SECC2 or Celeron processor packaged in an SEPP with heatsink and fan (top view)
Your motherboard comes preinstalled with a Universal Retention Mechanism (URM). The URM supports Pentium II and Celeron processors.
Universal Retention Mechanism (URM)

Heatsinks

The recommended heatsinks (see section on recommended heatsinks for Pentium II processors for more information) for the boxed Pentium II and Celeron processors are those with three-pin fans that can be connected to the fan connectors on the motherboard. WARNING! Be sure that there is sufficient air circulation 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. ASUS P2B Users Manual 19

III. INSTALLATION CPU

Universal Retention Mechanism

Installing the Processor

1. Unlock the URMs Folding Support Arms: The folding support arms of the URM are locked when shipped.
Locked Folding Support Arms
To unlock the support arms, simply flip them up to an upright position.
The URM is now ready for the installation of your processor. III. INSTALLATION CPU 20 2. Attach the Heatsink
Unlocked Folding Support Arms
NOTE: Follow carefully the heatsink attachment instructions included with your heatsink or processor. The following steps are provided only as a general guide and may not reflect those for your heatsink. SECC with Pentium II Place the SECC face down on a flat surface Push each end of the clamps until they lock and lay the heat sink flush on the back (metal Lock Lock side) of the SECC. Check the orientation of the heatsink against the illustration below. 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 SECC. Be sure that the heatsink is firmly pressed against the SECC. SECC2 with Pentium II/SEPPwith Celeron Insert the heatsink clip through the holes at the SECC2/SEPPs back, making sure that the bottom of the clip plate sits against the processorss back. Remove the tab from the thermal grease, SECC2/SEPP Heatsink Clip Legs which is located on the bottom of the heatsink) and place the heatsink over the processor. A slight rocking motion may be necessary to place the heatsink on the SECC2/SEPP, with one pair of the heatsink clip legs going first through the corresponding heatsink holes, and then the other pair. (NOTE: The heatsink and SECC2/SEPP holes are slightly offset to ensure good locking grip between the two.)

WARNING! Make sure the heatsink is mounted tightly against the SECC, SECC2 or SEPP; otherwise, the CPU will overheat. You may install an auxiliary fan to provide adequate circulation across the processors passive heatsink. 3. Insert the SECC/SECC2/SEPP SECC with Pentium II only: Push the SECCs two locks inward until you hear a click (the picture in step 2 shows the locks in the outward position and inward in the picture below). With the heatsink facing the motherboards chipset, push the SECC, SECC2, or SEPP gently but firmly into the Slot 1 connector until it is fully inserted.

SECC SECC2/SEPP

CPU fan cable to fan connector
4. Secure the SECC/SECC2/SEPP Secure the SECC/SECC2/SEPP in place by pushing the SECC/SECC2/SEPP until it is firmly seated on the Slot 1 connector. SECC with Pentium II only: The SECC locks should be outward when secured so that the lock shows through the retention mechanisms lock holes.
Lock hole CPU fan cable to fan connector
5. Attach the Thermal Sensor Cable (optional): If you purchased an ASUS Smart Fan (ASUS S-P2FAN) with an integrated thermal sensor cable (ASUS P2T-Cable) or purchased separately the P2T-Cable, you can connect the thermal sensor cable to your motherboards thermal sensor connector. (See next page for information on ASUS Smart Thermal Solutions.)

Push lock inward

ASUS Smart Thermal Solutions
ASUS provides two smart solutions to Slot 1 CPU thermal problems: the ASUS Smart Fan or ASUS S-P2FAN and the ASUS P2T-Cable. ASUS S-P2FAN Thermal Sensor CPU Fan Cable Rock Arm The optional ASUS Smart Fan or Cable ASUS S-P2FAN is a CPU fan for a Pentium II processor packaged in an SECC. Unlike other CPU thermal solutions, the ASUS S-P2FAN has an integrated thermal sensor located near the center of the CPU heat source. The sensor is optimized by ASUS to give the most accurate reading of the CPU temperature, thus provides the best protection to your computer system. III. INSTALLATION CPU 22 To Use the ASUS S-P2FAN See 2. Attach the Heatsink on the preceding page for the relevant procedures. Note that the S-P2FAN comes with a rock arm design for easy FAN/CPU installation.
ASUS P2T-Cable The optional ASUS P2T-Cable can be used for a Pentium II processor packaged in an SECC/SECC2 or a Celeron processor packaged in an SEPP.

Sensor

Sensor Connector Plug
NOTE: The ASUS P2T-Cable can only be used in a Slot 1 motherboard with a 2-pin thermal sensor connector. To Use the ASUS P2T-Cable NOTE: The following procedures assume that you have properly attached a heatsink onto an SECC/SECC2/SEPP. 1. Simply peel off the tab from the sensor and then stick the sensor near the middle edge of the Intel boxed processor heatsink with fan (middle) or to either the upper or lower edge of the Celeron heatsink (right), as indicated.

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. If your motherboard has audio onboard, an extra 3 IRQs will be used, leaving 3 IRQs free. 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 the 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.

III. INSTALLATION Connectors
12. 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.
13. Wake-on-LAN Connector (3-pin WOL_CON) The WOL_CON connector powers up the system when a wakeup packet or signal is received from the network through the ASUS PCI-L101 LAN card (see section VII. ASUS LAN Card). IMPORTANT: This feature requires that the WAKE On LAN Power Up Control is set to Enabled (see Power Management Setup under IV. BIOS SOFTWARE) and that your system has an ATX power supply with at least 720mA +5V standby power.
+5VSB (No Connection) Ground
P2B Wake on LAN Connector
PC/PCI Grant Sideband Signal PC/PCI Request Sideband Signal DGND

DGND Serial IRQ

NOTE: Pin 3 is removed to ensure the correct orientation of the cable on it.

P2B SB-Link Connector

15. SMBus Connector (5-1 pin SMB) This connector allows you to connect SMBus devices. SMBus devices communicate by means of the SMBus with an SMBus host and/or other SMBus devices. The SMBus or System Management Bus is a specific implementation of an I2C bus, which is a multi-master bus, that is, multiple chips can be connected to the same bus and each one can act as a master by initiating data transfer.
1 SMBCLK Ground SMBDATA +5V

P2B SMBus Connector

14. SB-Link Connector (6-1 pin SBLINK) Using Intels PC-PCI DMA and serialized IRQ protocols found in this motherboards AGPset, this connector allows Sound Blaster 16 compatibility to AWE64D (Digital) or other PCI audio cards, enabling users to play Real-mode DOS games and multimedia applications. SB-Link acts as a bridge between the motherboard and the PCI audio card by providing the DMA and IRQ signals present in the ISA bus but not available on the PCI bus.
16. 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 ACPI OS and driver support. 17. 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. This may require one or two pushes depending on the position of the switch. 18. 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. 19. 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. 20. 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. 21. Keyboard Lock Switch Lead (KEYLOCK) This 2-pin connector connects to the case-mounted key switch to allow keyboard locking. 22. Speaker Connector (SPEAKER) This 4-pin connector connects to the case-mounted speaker.

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. NOTE: SETUP Defaults are noted in parenthesis next to each function heading. IV. BIOS BIOS Features 41
Details of BIOS Features Setup
CPU Internal Core Speed (350MHz) 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. Turbo Mode (Disabled) Leave on default setting to resolve timing issues. Quick Power On Self Test (Enabled) This field speeds up the Power-On Self Test (POST) routine by skipping memory retesting a second and third 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 (A,C) This field determines where the system looks first for an operating system. Options are A,C; A,CDROM,C; CDROM,C,A; CDROM,A,C; D,A; E,A; F,A; C only; LS/ZIP, C; LAN,A,C; LAN,C,A; and C,A. The setup default setting is to check first the floppy disk and then the hard disk drive, that is, A, C. 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. HDD S.M.A.R.T. capability (Disabled) This field enables or disables S.M.A.R.T. (Self-Monitoring Analysis and Reporting Technology) support for S.M.A.R.T.-capable hard disk drives. This technology requires an application that can display S.M.A.R.T. warning messages.

If your DRAM modules do not have ECC chips (e.g. 8 chips), they are considered 64 bits 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 with hardware scrubbing 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.
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 Ultra DMA Mode (Auto) This field autodetects Ultra DMA capability (for improved transfer speeds and data integrity) for compatible IDE devices. Set to Disable to suppress Ultra DMA capability. 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 autodetection to ensure optimal performance

IV. BIOS Chipset Features 46

Power Management Setup

This Power Management Setup option allows you to reduce power consumption. This feature turns off the video display and shuts down the hard disk after a period of inactivity.
Details of Power Management Setup
IV. BIOS Power Management 47 Power Management (User Define) This field acts as the master control for the power management modes. Max Saving puts the system into power saving mode after a brief period of system inactivity; Min Saving is almost the same as Max Saving except that this time the system inactivity period is longer; Disable disables the power saving features; User Define allows you to set power saving options according to your preference. IMPORTANT: Advanced Power Management (APM) should be installed to keep the system time updated when the computer enters suspend mode activated by the BIOS Power Management. For DOS environments, you need to add the statement, DEVICE=C:\DOS\POWER.EXE, in you CONFIG.SYS. For Windows 3.x and Windows 95, you need to install Windows with the APM feature. A battery and power cord icon labeled Power will appear in the Control Panel. Choose Advanced in the Power Management Field. Video Off Option (Suspend -> Off ) This field determines when to activate the video off feature for monitor power management. The settings are Suspend -> Off and Always On.
Video Off Method (DPMS OFF) This field defines the video off features. The following options are available: DPMS OFF, DPMS Reduce ON, Blank Screen, V/H SYNC+Blank, DPMS Standby, and DPMS Suspend. The DPMS (Display Power Management System) features allow the BIOS to control the video display card if it supports the DPMS feature. Blank Screen only blanks the screen (use this for monitors without power management or green features. If set up in your system, your screen saver will not display with Blank Screen selected). V/H SYNC+Blank blanks the screen and turns off vertical and horizontal scanning..... PM Timers This section controls the time-out settings for the Power Management scheme. The fields included in this section are HDD Power Down, which places the hard disk into its lowest power consumption mode, and the Doze, Standby and Suspend system inactivation modes. The system automatically wakes up from any power saving mode when there is system activity such as when a key is pressed from the keyboard, or when there is activity detected from the enabled IRQ channels. HDD Power Down (Disable) Shuts down any IDE hard disk drives in the system after a period of inactivity. This time period is user-configurable to 115 Min or Disable. This feature does not affect SCSI hard drives. Suspend Mode (Disable) Sets the period of time after which each of these modes activate: 30 sec, 1 Min, 2 Min, 4 Min, 8 Min, 20 Min, 30 Min, 40 Min, 1 Hour, and Disable..... Power Up Control This section determines the ways the system can be controlled when it is started or restarted, when modem activity is detected, or when power to the computer is interrupted and reapplied. The Soft-Off mode refers to powering off the system through a momentary button switch (ATX switch) or through the software as opposed to disconnecting the AC power by way of a rocker switch or other means. PWR Button < 4 Secs (Soft Off) When set to Soft Off, the ATX switch can be used as a normal system power-off button when pressed for less than 4 seconds. Suspend allows the button to have a dual function where pressing less than 4 seconds will place the system in sleep mode. No Function disables the ATX switch function when the button is pressed under 4 seconds. Regardless of the setting, holding the ATX switch for more than 4 seconds will power off the system.

IV. BIOS Power Management 48
PWR Up On Modem Act (Enabled) This allows either settings of Enabled or Disabled for powering up the computer (turns the ATX power supply on) when the modem receives a call while the computer is Soft Off. NOTE: The computer cannot receive or transmit data until the computer and applications are fully running, thus connection cannot be made on the first try. Turning an external modem off and then back on while the computer is off causes an initialization string that will also cause the system to power on. AC PWR Loss Restart (Disabled) This allows you to set whether you want your system to boot up after the power has been interrupted. Disabled leaves your system off after reapplying power and Enabled boots up your system after reapplying power. Wake On LAN (Enabled) This allows you to remotely power up your system through your network by sending a wake-up frame or signal. With this feature, you can remotely upload/download data to/from systems during off-peak hours. Set to Enabled to set this feature. IMPORTANT: This feature requires the ASUS PCI-L101 LAN Card (see VII. ASUS LAN Card) and an ATX power supply with at least 720mA +5V standby power. Automatic Power Up (Disabled) This allows you to have an unattended or automatic power up of your system. You may configure your system to power up at a certain time of the day by selecting Everyday, which will allow you to set the time or at a certain time and day by selecting By Date..... Fan Monitor (xxxxRPM) The onboard hardware monitor is able to detect the Chassis Fan Speed, CPU Fan Speed, and the Power Supply Fan Speed in Rotations Per Minute (RPM). Set to Ignore if one of these are not used so that error messages will not be given..... Thermal Monitor (xxxC/xxxF) The onboard hardware monitor is able to detect the CPU and MB (motherboard) temperatures. Set to Ignore only if necessary..... Voltage Monitor (xx.xV) The onboard hardware monitor is able to detect the voltages put out by the voltage regulators. Set to Ignore only if necessary. NOTE: If any of the monitored items are out of range, an error message will appear: Hardware Monitor found an error, enter POWER MANAGEMENT SETUP for details. You will then be prompted to Press F1 to continue, DEL to enter SETUP.
IV. BIOS Power Management

PNP and PCI Setup

This PNP and PCI Setup option configures the PCI bus slots. All PCI bus slots on the system use INTA#, thus all installed PCI cards must be set to this value.
Details of PNP and PCI Setup
PNP OS Installed (No) This field allows you to use a Plug-and-Play (PnP) operating system to configure the PCI bus slots instead of using the BIOS. Thus interrupts may be reassigned by the OS when Yes is selected. When a non-PnP OS is installed or to prevent reassigning of interrupt settings, select the default setting of No. Slot 1 IRQ to Slot 4 IRQ (Auto) These fields set how IRQ use is determined for each PCI slot. The default setting for each field is Auto, which uses auto-routing to determine IRQ use. The other options are manual settings of NA, 5, 7, 9, 10, 11, 12, 14 or 15 for each slot. PCI Latency Timer (32 PCI Clock) The default setting of 32 PCI Clock enables maximum PCI performance for this motherboard. IRQ xx Used By ISA (No/ICU) These fields indicate whether or not the displayed IRQ for each field is being used by a legacy (non-PnP) ISA card. Two options are available: No/ICU and Yes. The first option, the default value, indicates either that the displayed IRQ is not used or an ISA Configuration Utility (ICU) is being used to determine if an ISA card is using that IRQ. If you install a legacy ISA card that requires a unique IRQ, and you are not using an ICU, you must set the field for that IRQ to Yes. For example: If you install a legacy ISA card that requires IRQ 10, then set IRQ10 Used By ISA to Yes....

IV. BIOS Load Defaults 52 ASUS P2B 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.
Forgot the password? If you forgot the password, you can clear the password by erasing the CMOS Real Time Clock (RTC) RAM. The RAM data containing the password information is powered by the onboard button cell battery. To erase the RTC RAM: (1) Unplug your computer, (2) Short the solder points, (3) Turn ON your computer, (4) Hold down <Delete> during bootup and enter BIOS setup to re-enter user preferences.
Short small solder points to clear CMOS CLRTC

P2B Clear RTC RAM

IV. BIOS Passwords
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.

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
NOTE: The following screen displays are provided as examples only and may not reflect the screen contents on your system. Edit DMI (or delete)
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 have been modified by the user.

V. DMI Using DMI Utility

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.

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 P2B Users Manual

VI. ASUS LAN Card

VI. ASUS LAN Card Parts / Layout 59
ASUS PCI-L101 Fast Ethernet Card
LAN Activity Output Signal

Intel Chipset

Wake on LAN Output Signal

Motherboard type

If you are using the ASUS PCI-L101 on an ASUS motherboard, leave the jumper on its defaut setting of ASUS. If you are using another brand of motherboard, set th jumper to Other. Connect the Wake on LAN (WOL) output signal to the motherboard s WOL_CON in order to utilize the wake on LAN feature of the motherboard. Connect the LAN activity output signal (LAN_LED) to the system cabinet s front panel LAN_LED in order to display the LAN data activity.