Chipset Features Setup... 44 Details of Chipset Features Setup.. 44 Power Management Setup... 47 Details of Power Management Setup. 47 PNP and PCI Setup... 50 Details of PNP and PCI Setup.. 50 Load BIOS Defaults... 52 Load Setup Defaults... 52 Supervisor Password and User Password.. 53 IDE HDD Auto Detection... 54 Save & Exit Setup... 55 Exit Without Saving... 55 V. DESKTOP MANAGEMENT 56 Desktop Management Interface (DMI).. 56 Introducing the ASUS DMI Configuration Utility. 56 System Requirements.. 56 Using the ASUS DMI Configuration Utility.. 57 Using the ASUS DMI Configuration Utility.. 57 VI. ASUS LAN Card 59 ASUS PCI-L101 Fast Ethernet Card.. 59 Features... 60 Software Driver Support... 60 Question and Answer... 60

FCC & DOC COMPLIANCE

Federal Communications Commission Statement
This device complies with FCC Rules Part 15. Operation is subject to the following two conditions: This device may not cause harmful interference, and This device must accept any interference received, including interference that may cause undesired operation.
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
The ASUS P2B is carefully designed for the demanding PC user who wants advanced features processed by the fastest CPU.
Multi-Speed: Supports Intel Pentium II (233 to 500MHz) and CeleronTM (266MHz and faster) processors. Multi-Cache: Supports processors with or without Pipelined Burst Level 2 cache. Intel AGPset: Features Intels 440BX AGPset with I/O subsystems and front-side bus (FSB) platform, which boosts the traditional 66-MHz internal bus speed to 100MHz. Enhanced ACPI and Anti-Boot Virus BIOS: Features a programmable BIOS, offering enhanced ACPI for Windows 98 compatibility, built-in hardware-based virus protection through Trend ChipAway Virus, and autodetection of most devices for virtually automatic setup. PC100 Memory Support: Equipped with three DIMM sockets to support Intel PC100compliant SDRAMs (8, 16, 32, 64, 128, or 256MB) up to 768MB. These new SDRAMs are necessary to meet the enhanced 100MHz bus speed requirement. Thermal Sensor Connector with Optional Sensor: Accurately detects the CPU temperature of processors with the ASUS Smart Fan or the Intel boxed processor heatsink with fan when connected to an ASUS P2T-Cable. Hardware Monitoring: Provides a convenient utility to monitor your systems vital components/activities, such as fan rotations, voltages, and temperatures. Wake-On-LAN: Supports Wake-OnLAN activity with special network cards, such as the ASUS PCI-L101 10/100 Fast Ethernet PCI card. AGP Slot: Supports Accelerated Graphics Port cards for high performance, component level interconnect targeted at 3D graphical display applications. SB-Link: Features Creatives SB-Link, allowing SB16 compatibility, using Intels PC-PCI DMA and serialized IRQ protocols, to AWE64D or compatible PCI audio cards. SMBus: Features the System Management Bus interface, which is used to physically transport commands and information between SMBus devices. PCI & ISA Expansion Slots: Provides four 32-bit PCI and three 16-bit ISA slots. Intelligence: Supports Keyboard Power Up, Fan Status Monitoring and Alarm, Temperature Monitoring and Alert, Voltage Monitoring and Alert, System Resources Alert, Intel LANDesk Client Manager (LDCM), and ASUS PC Probe software. 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 Bus Master IDE: Comes with an onboard PCI Bus Master IDE controller with two connectors that support four IDE devices in two channels, supports UltraDMA/33, PIO Modes 3 and 4 and Bus Master IDE DMA Mode 2, and supports Enhanced IDE devices, such as Tape Backup, CD-ROM, and LS-120 drives. Universal Retention Mechanism: Supports a Pentium II processor packaged in a Single Edge Contact Cartridge (SECC/SECC2) or a CeleronTM processor packaged in a Single Edge Processor Package (SEPP). SCSI BIOS: Supports optional ASUS SCSI controller cards through onboard SYMBIOS firmware. IrDA: Supports an optional infrared port module for wireless interface. Concurrent PCI: Allows multiple PCI transfers from PCI master buses to memory to CPU.

II. FEATURES Specifications 8

The ASUS P2B Motherboard

ATX Power Connector

CPU Slot 1

Intel 440BX AGPset

3 DIMM Sockets

T: USB Port 1 B: USB Port 2 B: COM 1

T: Parallel B: Serial

B: COM 2
Universal Folding Retention Mechanism Accelerated Graphics Port Wake-On-LAN Connector 4 PCI Slots
Programmable 2Mbit Flash EEROM

Hardware Monitoring ASIC

3 ISA Slots
II. FEATURES Motherboard Parts
T: PS/2 Mouse B: PS/2 Keyboard

III. INSTALLATION

Layout of the ASUS P2B Motherboard

PWR_FAN

BOTTOM:

CPU_FAN

DIMM Socket 1 (64/72 bit, 168 pin module)
DIMM Socket 2 (64/72 bit, 168 pin module)
DIMM Socket 3 (64/72 bit, 168 pin module)

Keyboard Power

ATX Power Conenctor

Keyboard

BUS FREQ

FS3 FS2 FS1 FS0

Parallel Port
Accelerated Graphics Port

Wake-On-LAN Connector

Multi-I/O

PCI Slot 1

CR2032 3V Lithium Cell

(CMOS Power)

Flash EEPROM (Programable BIOS)

PCI Slot 2

PCI Slot 3

CHASIS

SBLINK

Intel PIIX4E PCIset

BF3 BF2 BF1 BF0

PCI Slot 4 ISA Slot 1

Hardware Monitor

ASUS ASIC

CHA_FAN

ISA Slot 2

Infrared Connector IDE LED

SMB Connector

ISA Slot 3

Panel Connectors

SECONDARY IDE

PRIMARY IDE

FLOPPY
III. INSTALLATION Board Layout

Jumpers

1) 2) 3) 4) 5) 1) 2) 3) 4) 5) 6) KBPWR AGPFS VIO FS0, FS1, FS2, FS3 BF0, BF1, BF2, BF3 System Memory DIMM Sockets CPU Slot 1 SLOT1, SLOT2, SLOT3 PCI1, PCI2,PCI3, PCI4 AGP p. 12 Keyboard Power p. 13 AGP Frequency Selection p. 13 Voltage Input/Output Selection p. 14 CPU External Clock (BUS) Frequency Selection p. 14 CPU Core:BUS Frequency Multiple p. 17 System Memory Support p. 18 DIMM Memory Module Support p. 19 Pentium II/Celeron CPU Support p. 24 16-bit ISA Bus Expansion Slots* p. 24 32-bit PCI Bus Expansion Slots p. 25 Accelerated Graphics Port p. 23 Thermal Sensor Connector

Expansion Slots/Sockets

Hardware Monitor Connectors
1) 2) 3) 4) 5) 6) 7) 8) 9) 10) 11) 12) 13) 14) 15) 16) 17) 18) 19) 20) 21) 22)
PS2KBMS p. 26 PS/2 Keyboard Connector (6-pin female) PS2KBMS p. 26 PS/2 Mouse Connector (6-pin female) PARALLEL 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/Secondary IDE p. 28 Primary/Secondary IDE Connector (40-pin blocks) IDELED p. 28 IDE LED Activity Light (2 pins) CHA_, PWR_, CPU_FAN p. 29 Chassis, Power Supply, CPU Fan Power Lead (3-pin block) CHASIS p. 29 Chassis Intrusion Alarm Lead (4-1 pins) IR p. 30 Infrared Port Module Connector (5 pins) ATXPWR p. 30 ATX Motherboard Power Connector (20-pin block) WOL_CON p. 31Wake on LAN Connector (3 pins) SBLINK p. 31 SB-Link Connector (6-1 pins) SMB p. 31 SMBus Connector (5-1 pins) 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)
The onboard hardware monitor uses the address 290H-297H so legacy ISA cards must not use this address otherwise conflicts will occur.

1) JTPWR, JTCPU

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

1. Jumpers

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. III. INSTALLATION Jumpers 12 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.

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.
(This page was intentionally left blank.)

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.

Tab Sensor

OR STICK ABOUT HERE
WARNING! Do not insert the sensor between the processor and heatsink, otherwise, it will cause damage to the P2T-Cable. IMPORTANT! ASUS guarantees accurate readings only for the ASUS Smart Fan and the Intel boxed processor heatsink with fan because both have similar heat distribution and heatsink material. 2. Connect the P2T-Cable to the CPU thermal sensor connector (JTCPU).

CPU Thermal Sensor JTCPU

Power Supply Thermal Sensor JTPWR
P2B Thermal Sensor Connectors
NOTE: If you have a power supply with thermal monitoring, connect its thermal sensor cable to JTPWR.

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 an ASUS 3D Hardware Accelerator.
P2B Accelerated Graphics Port (AGP)
III. INSTALLATION DMA Channels

5. External Connectors

WARNING! Some pins are used for connectors or power sources. These are clearly distinguished from jumpers in the motherboard layout. Placing jumper caps over these connectors 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 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.

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.

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.

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 (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. V. DMI DMI Introduction 56 ASUS P2B Users Manual

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.

Features

Intel 82558 Ethernet LAN Controller (Fully integrated 10BASE-T/100BASE-TX) Wake-On-LAN Remote Control Function Supported PCI Bus Master Complies to PCI Local Bus Rev. 2.1 specifications Consists of MAC & PHY (10/100Mbps) interfaces Complies to IEEE 802.3 10BASE-T and IEEE 802.3u 100BASE-TX interfaces Fully supports 10BASE-T & 100BASE-TX operations through a single RJ45 port Supports 32-bit Bus Master Technology / PCI Rev. 2.1 Enhancements on ACPI & APM Adheres to PCI Bus Power Management Interface Rev. 1.0, ACPI Rev. 1.0, and Device Class Power Management Rev. 1.0 IEEE 802.3u auto-negotiation for 10Mbps/100Mbps Network Data Transfer Rates. Provides LED indicators for monitoring network conditions Plug and Play VI. ASUS LAN Card Information 60

CONTENTS

I. INTRODUCTION 7 How this Manual is Organized... 7 Item Checklist... 7 II. FEATURES 8 Features of the ASUS P2B-B Motherboard.. 8 The ASUS P2B-B Motherboard.. 11 III. INSTALLATION 12 Layout of the ASUS P2B-B Motherboard.. 12 Installation Steps... 14 1. Jumpers.... 14 Jumper Settings... 14 2. System Memory (DIMM)... 17 DIMM Memory Installation Procedures:.. 18 3. Central Processing Unit (CPU).. 19 Universal Retention Mechanism.. 19 Heatsinks... 19 Installing the Processor... 20 ASUS Smart Thermal Solutions.. 22 Recommended Heatsinks for Slot 1 Processors.. 23 4. Expansion Cards... 24 Expansion Card Installation Procedure.. 24 Assigning IRQs for Expansion Cards. 24 Assigning DMA Channels for ISA Cards.. 25 ISA Cards and Hardware Monitor... 25 5. External Connectors... 26 Power Connection Procedures... 35 IV. BIOS SOFTWARE 36 Flash Memory Writer Utility.. 36 Main Menu.... 36 Managing and Updating Your Motherboards BIOS. 38 6. BIOS Setup.... 39 Load Defaults.. 40 Standard CMOS Setup... 40 Details of Standard CMOS Setup:... 40 BIOS Features Setup.. 43 Details of BIOS Features Setup.. 43
Chipset Features Setup... 46 Details of Chipset Features Setup.. 46 Power Management Setup... 49 Details of Power Management Setup. 49 PNP and PCI Setup... 52 Details of PNP and PCI Setup.. 52 Load BIOS Defaults... 54 Load Setup Defaults... 54 Supervisor Password and User Password.. 55 IDE HDD Auto Detection... 56 Save & Exit Setup... 57 Exit Without Saving... 57 V. SUPPORT CD 58 ASUS Smart Motherboard Support CD.. 58 Desktop Management Interface (DMI).. 59 Introducing the ASUS DMI Configuration Utility. 59 System Requirements.. 59 Using the ASUS DMI Configuration Utility.. 60 VI. ASUS LAN Card 63 ASUS PCI-L101 Fast Ethernet Card.. 63 Features... 64 Software Driver Support... 64 Question and Answer... 64

FCC & DOC COMPLIANCE

Federal Communications Commission Statement
This device complies with FCC Rules Part 15. Operation is subject to the following two conditions: This device may not cause harmful interference, and This device must accept any interference received, including interference that may cause undesired operation.
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 CD: Manual information and checklist Information and specifications concerning this product Instructions on setting up the motherboard and jumpers 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 (2) Serial cables (1) Parallel+PS/2 mouse cable on a mounting bracket (1) Bag of spare jumper caps (1) Support CD with drivers and utilities (1) Motherboard Users manual Infrared module (optional) USB/MIR module (optional) ASUS PCI-L101 Wake-On-LAN 10/100 Ethernet Card (optional) ASUS PC100-compliant SDRAM (optional)

II. FEATURES

Features of the ASUS P2B-B Motherboard
The ASUS P2B-B is carefully designed for the demanding PC user who wants advanced features processed by the fastest CPU. Specifications: Multi-Speed: Supports Intel Pentium II (233MHz to 450MHz) and CeleronTM (266MHz and faster) processors. Intel AGPset: Features Intels 440BX AGPset with I/O subsystems and front-side bus (FSB) platform, which boosts the traditional 66-MHz internal bus speed to 100MHz. Multi-Cache: Supports processors with Pipelined Burst Level 2 cache. PC100 Memory Support: Equipped with three DIMM sockets to support Intel PC100-compliant SDRAMs (8, 16, 32, 64, 128, or 256MB) up to 768MB. These new SDRAMs are necessary to meet the critical enhanced 100MHz bus speed requirement. Peripheral Wake Up: Supports modem wake up, keyboard wake up, and LAN card wake up functions from sleep or soft-off mode. Chassis Intrusion Detection: Supports chassis-intrusion monitoring through LDCM. PC Health Monitoring: Provides an easier way to examine and manage system status information such as system voltage, temperature, and fan status through the provided software. AGP Slot: Supports AGP graphics cards for high performance, component level interconnect targeted at 3D graphical display applications. SB-Link: Features Creatives SB-Link, allowing SB16 compatibility, using Intels PC-PCI DMA and serialized IRQ protocols, to AWE64D or compatible PCI audio cards. SMBus: Features the System Management Bus interface, which is used to physically transport commands and information between SMBus devices. PCI & ISA Expansion Slots: Provides three 32-bit PCI and two 16-bit ISA slots. One ISA slot is shared with a PCI slot. Super Multi-I/O: Provides two high-speed UART compatible serial ports and one parallel port with EPP and ECP capabilities. UART2 can also be directed from COM2 to the Infrared Module for wireless connections. Ultra DMA/33 Bus Master IDE: Comes with an onboard PCI Bus Master IDE controller with two connectors that support four IDE devices in two channels, supports UltraDMA/33, PIO Modes 3 and 4 and Bus Master IDE DMA Mode 2, and supports Enhanced IDE devices, such as Tape Backup, CD-ROM, and LS-120 drives. Universal Retention Mechanism: Supports a Pentium II processor packaged in a Single Edge Contact Cartridge (SECC/SECC2) or a CeleronTM processor packaged in a Single Edge Processor Package (SEPP). Wake-On-LAN Header: Supports Wake-On-LAN activity with special network cards, such as the ASUS PCI-L101 10/100 Fast Ethernet PCI card.

II. FEATURES Specifications 8
Special Features: Enhanced ACPI and Anti-Boot Virus BIOS: Features a programmable BIOS, offering enhanced ACPI for Windows 98 compatibility, built-in firmware-based virus protection through Trend ChipAway Virus codes, and autodetection of most devices for virtually automatic setup. 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.) Easy Installation: Incorporates BIOS that supports autodetection of hard disk drives, PS/2 mouse, and Plug and Play devices to make the setup of hard disk drives, expansion cards, and other devices virtually automatic. PC98 Compliant: Both the BIOS and hardware levels of ASUS smart series of motherboards meet PC98 compliancy. The new PC98 requirements for systems and components are based on the following high-level goals: Support for Plug and Play compatibility and power management for configuring and managing all system components, and 32-bit device drivers and installation procedures for Windows 95/98/NT. Symbios SCSI BIOS: Supports optional ASUS SCSI controller cards through the onboard SYMBIOS firmware. Performance Features: Concurrent PCI: Concurrent PCI allows multiple PCI transfers from PCI master busses to the memory and processor. Double the IDE Transfer Speed: ASUS smart series motherboards with Intel chipsets improve IDE transfer rates using Bus Master UltraDMA/33 IDE which can handle data transfer up to 33MB/s. The best of all is that this new technology is compatible with existing ATA-2 IDE specs so there is no need to upgrade current hard drives or cables. SDRAM Optimized Performance: Supports the new generation memory - Synchronous Dynamic Random Access Memory (SDRAM) which increases the data transfer rate from 528MB/s max using EDO memory to 800MB/s max using PC100-compliant SDRAM.
II. FEATURES Specifications
Intelligent Features: Auto Fan Off: The system fans will power off automatically even in sleep mode. This function reduces both energy consumption and system noise, and is an important feature in implementing silent PC systems. Dual Function Power Button: Pushing the power button for less than 4 seconds when the system is in the working state places the system into one of two states: sleep mode or soft-off mode, depending on the BIOS setting (see Power Management Setup under BIOS SOFTWARE). When the power button is pressed for more than 4 seconds, the system enters the soft-off mode regardless of the BIOS setting. Fan Status Monitoring and Alarm: To prevent system overheat and system damage, the CPU fan and system fans can be monitored for RPM and failure. All the fans are set for its normal RPM range and alarm thresholds. Keyboard Power Up: Keyboard Power Up can be enabled or disabled to allow the computer to be powered on by pressing the space bar on the keyboard. Message LED (requires ACPI OS support): Turbo LEDs now act as information providers. Through the way a particular LED illuminates, the user can determine the stage the computer is in. A simple glimpse provides useful information to the user. Remote Ring On (requires external modem): This allows a computer to be turned on remotely through an external modem. With this benefit on-hand, any user can access vital information from their computer from anywhere in the world! System Resources Alert: Todays operating systems such as Windows 95/98/ NT and OS/2, require much more memory and hard drive space to present enormous user interfaces and run large applications. The system resource monitor will warn the user before the system resources are used up to prevent possible application crashes. Suggestions will give the user information on managing their limited resources more efficiently. Temperature Monitoring and Alert: To prevent system overheat and system damage, there are thermal sensors to monitor the CPU (the Pentium II processor requires a special heatsink with a thermal sensor) and system temperatures to warn of damaging temperatures. Voltage Monitoring and Alert: System voltage levels are monitored to ensure stable voltage to critical motherboard components. Voltage specifications are more critical for future processors, so monitoring is necessary to ensure proper system configuration and management.

KB-PS2KB p. 26 PS/2 Keyboard Port Connector (6-pin female) FLOPPY p. 27 Floppy Drive Port Connector (34 pins) PARALLEL p. 27 Parallel Port Connector (25-pin female) COM1, COM2 p. 27 Serial Port COM1 & COM2 (two 9-pin male) Primary/Secondary IDE p. 28 Primary/Secondary IDE Connector (40 pins) IDELED p. 28 IDE LED Activity Light (2 pins) CHA_, PWR_, CPU_FAN p. 29 Chassis, Power Supply, CPU Fan Power Lead (3 pins) WOL_CON p. 29 Wake-On-LAN Connector (3 pins) MSG.LED (PANEL) p. 30 System Message LED (2 pins) SMI (PANEL) p. 30 SMI Switch Lead (2 pins) PWR.SW (PANEL) p. 30 ATX Power & Soft-Off Switch Lead (2 pins) RESET (PANEL) p. 30 Reset Switch Lead (2 pins) PWR.LED (PANEL) p. 30 System Power LED Lead (3-1 pins) KEYLOCK (PANEL) p. 30 Keyboard Lock Switch Lead (2 pins) SPEAKER (PANEL) p. 30 Speaker Output Connector (4 pins) USB/MIR p. 31 PS/2 Mouse/USB/IR Combo-Connector (18-1 pins) IR p. 31 Infrared Port Module Connector (5 pins) ATXPWR p. 32 ATX Motherboard Power Connector (20 pins) PS/2 p. 32 AT Motherboard Power Connector (20 pins) SBLINK p. 33 SB-Link Port Connector (6-1 pins) SMB p. 33 SMBus Connector (3 pins) CHASIS p. 34 Chassis Intrusion Alarm Lead (3 pins)
The onboard hardware monitor uses the address 290H-297H so legacy ISA cards must not use this address or else conflicts will occur.
III. INSTALLATION Layout Contents

Installation Steps

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

1. Jumpers

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. III. INSTALLATION Jumpers 14 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.

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) Unplug your computer, (2) Short solder points, (3) Turn on your computer, (4) Hold down <Delete> during bootup and enter BIOS setup to reenter user preferences. RTC RAMCLRTC Clear Data [short solder points momentarily]

COM 1 Pin 1 COM 2 Pin 1

P2B-B Serial Port Connectors
III. INSTALLATION Connectors
5. Primary / Secondary IDE connectors (Two 40-1 pin 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 up to four operating systems on each IDE drive and select the boot disk through Boot Sequence in the BIOS Features Setup. III. INSTALLATION Connectors 28

P2B-B IDE Connectors

6. IDE activity LED (2-pin IDELED) 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.
TIP: If the case-mounted LED does not light, try reversing the 2-pin plug.

P2B-B IDE Activity LED

Secondary IDE Connector Primary IDE Connector
NOTE: Orient the red markings (usually zigzag) on the IDE ribbon cable to pin 1
7. Chassis, CPU , & Power Supply Fan Connectors (3-pin CHA_, CPU_, PWR_FAN) These connectors support cooling fans of 500mAMP (6 Watts) 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. NOTE: The Rotation signal is to be used only by a specially designed fan with rotation signal. WARNING! These connectors have power. Damage may occur to the motherboard and/or the CPU fan if these connectors are incorrectly used.

GND +12V Rotation

CPU Fan Power

Power Supply Fan

Rotation +12V GND

IRTX GND IRRX

+5V (NC)
P2B-B Infrared Module Connector

PS/2 Mouse

18. ATX Power Supply Connector (20-pin ATXPWR) This connector connects to an 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 making sure that the pins are aligned. IMPORTANT: Make sure that your ATX power supply can supply at least 10mA 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.
P2B-B ATX Power Connector
19. AT Power Supply Connector (12-pin PS/2) This connector connects to a standard 5 Volt power supply. To connect the leads from the power supply, ensure first that the power supply is not plugged. Most power supplies provide two plugs (P8 and P9), each containing six wires, two of which are black. Orient the connectors so that the black wires are together.

+12V GND +5V PG

+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
Power Connector on Motherboard
Power Plugs from Power Supply

P2B-B AT Power Connector

Using a slight angle, align the plastic guide pins on the lead to their receptacles on the connector. Once aligned, press the lead onto the connector until the lead locks into place.
RED RED RED WHT BLK BLK BLK BLK BLU YLW RED ORG
20. SB-Link Connector (6-1 pin SBLINK) Using Intels PC-PCI 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.
PC/PCI Grant Sideband Signal
DGND PC/PCI Request Sideband Signal Serial IRQ

P2B-B SB-Link Connector

21. 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.

SMBCLK Ground +5V

SMBDATA

P2B-B SMBus Connector

NOTE: Pin 3 is removed to ensure the correct orientation of the cable on it.
22. Chassis Intrusion Sensor Lead (4-1 pin CHASIS) This lead is for a chassis intrusion monitor or sensor. The sensor is triggered when a high level signal is sent to the chassis signal lead. This occurs when a panel switch or light detector is triggered. This function requires optional trigger switches to be installed.
+5Volt (Power Supply Stand By) Chassis Signal Ground
P2B-B Chassis Open Alarm Lead
III. INSTALLATION Connectors 34
Power Connection Procedures
1. After all connections are made, close the system case cover. 2. Be sure that all switches are off (in some systems, marked with ). 3. Connect the power supply cord into the power supply located on the back of your system case according to your system users manual. 4. Connect the power cord into a power outlet that is equipped with a surge protector. 5. You may then turn on your devices in the following order: a. Your monitor b. External SCSI devices (starting with the last device on the chain) c. Your system power. For ATX power supplies, you need to switch on the power supply as well as press the ATX power switch on the front of the case. 6. The power LED on the front panel of the system case will light. For ATX power supplies, the system LED will light when the ATX power switch is pressed. The monitor LED may light up after the systems if it complies with green standards or if it has a power standby feature. The system will then run power-on tests. While the tests are running, additional messages will appear on the screen. If you do not see anything within 30 seconds from the time you turn on the power, the system may have failed a power-on test. Recheck your jumper settings and connections or call your retailer for assistance. 7. During power-on, hold down <Delete> to enter BIOS setup. Follow the instructions in the next section, BIOS SOFTWARE. * Powering Off your computer: You must first exit or shut down your operating system before switching off the power switch. For ATX power supplies, you can press the ATX power switch after exiting or shutting down your operating system. If you use Windows 95, click the Start button, click Shut Down, and then click Shut down the computer? NOTE: The message You can now safely turn off your computer will not appear when shutting down with ATX power supplies. III. INSTALLATION Power Connections 35

IV. BIOS SOFTWARE

Flash Memory Writer Utility
AFLASH.EXE: This is the Flash Memory Writer utility that updates the BIOS by uploading a new BIOS file to the 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.

Standard CMOS Setup

The Standard CMOS Setup option allows you to record some basic system hardware configuration and set the system clock and error handling. If the motherboard is already installed in a working system, you will not need to select this option. However, if the configuration stored in the CMOS memory on the board gets lost or damaged, or if you change your system hardware configuration, you will need to respecify the configuration values. The configuration values usually get lost or corrupted when the power of the onboard CMOS battery weakens.
IV. BIOS Standard CMOS The preceding 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). 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 the motherboard BIOS software. If the motherboard has SCSI onboard, see the SCSI section for information on configuring SCSI devices. If you are using SCSI controller cards, refer to their respective documentations on how to configure and setup SCSI devices. IV. BIOS Standard CMOS 41 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.

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: 360K, 5.25 in.; 1.2M, 5.25 in.; 720K, 3.5 in.; 1.44M, 3.5 in.; 2.88M, 3.5 in.; None IV. BIOS Standard CMOS 42 To enter the configuration value for a particular drive, highlight its corresponding field and then select the drive type using the <Page Up>/<Page Down> or <+>/<-> 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 40, 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. NOTE: SETUP Defaults are noted in parenthesis next to each function heading. IV. BIOS BIOS Features 43

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 unidirectional 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 48

Power Management Setup

The 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.

IV. BIOS Plug & Play / PCI 52
DMA x Used By ISA (No/ICU) These fields indicate whether or not the displayed DMA channel for each field is being used by a legacy (non-PnP) ISA card. Available options include: No/ICU and Yes. The first option, the default setting, indicates either that the displayed DMA channel is not used or an ICU is being used to determine if an ISA card is using that channel. If you install a legacy ISA card that requires a unique DMA channel, and you are not using an ICU, you must set the field for that channel to Yes. ISA MEM Block BASE (No/ICU) This field allows you to set the base address and block size of a legacy ISA card that uses any memory segment within the C800H and DFFFH address range. If you have such a card, and you are not using an ICU to specify its address range, select a base address from the six available options; the ISA MEM Block SIZE field will then appear for selecting the block size. If you have more than one legacy ISA card in your system that requires to use this address range, you can increase the block size to either 8K, 16K, 36K, or 64K. If you are using an ICU to accomplish this task, leave ISA MEM Block BASE to its default setting of No/ICU. SYMBIOS SCSI BIOS (Auto) The default uses Auto settings for the onboard SCSI BIOS. If you do not want to use the onboard SCSI BIOS, choose Disabled USB IRQ (Enabled) Enabled reserves an IRQ# for the USB to work, Disabled does not allow the USB to have an IRQ# and therefore prevents the USB from functioning. If you are not using any USB devices, you may set this feature to Disabled to save an extra IRQ# for expansion cards. VGA BIOS Sequence (PCI/AGP) If your computer has both PCI and AGP VGA cards, this field allows you to select which of the cards will act as your primary card. The default, PCI/AGP, allows your PCI card to take precedent when detected. AGP/PCI uses the AGP card as your primary card.
IV. BIOS Plug & Play / PCI

Load BIOS Defaults

The Load BIOS Defaults option allows you to load the troubleshooting default values permanently stored in the BIOS ROM. These default settings are non-optimal and disable all high performance features. To load these default settings, highlight Load BIOS 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.

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)
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.
V. Support CD Using DMI Utility 60
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.

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. Support CD 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. ASUS P2B-B Users Manual 61

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VI. ASUS LAN Card

VI. ASUS LAN Card Parts / Layout 63
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 default setting of ASUS. If you are using another brand of motherboard, set the jumper to Other. Connect the Wake-On-LAN (WOL) output signal to the motherboards 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 cabinets front panel LAN_LED in order to display the LAN data activity.

Features

Intel 82558 Ethernet LAN Controller (Fully integrated 10BASE-T/100BASE-TX) Wake-On-LAN Remote Control Function Supported PCI Bus Master Complies to PCI Local Bus Rev. 2.1 specifications Consists of MAC & PHY (10/100Mbps) interfaces Complies to IEEE 802.3 10BASE-T and IEEE 802.3u 100BASE-TX interfaces Fully supports 10BASE-T & 100BASE-TX operations through a single RJ45 port Supports 32-bit Bus Master Technology / PCI Rev. 2.1 Enhancements on ACPI & APM Adheres to PCI Bus Power Management Interface Rev. 1.0, ACPI Rev. 1.0, and Device Class Power Management Rev. 1.0 IEEE 802.3u auto-negotiation for 10Mbps/100Mbps Network Data Transfer Rates. Provides LED indicators for monitoring network conditions Plug and Play VI. ASUS LAN Card Information 64

Software Driver Support

NetWare ODI Drivers - Novell Netware 3.x, 4.x, DOS, OS/2 Client NDIS 2.01 Drivers - Microsoft LAN Manager, Microsoft Windows 3.11, IBM LAN Server NDIS 3.0 Drivers - Microsoft Windows NT, Microsoft Windows 95, Microsoft Windows 3.11

Question and Answer

Q: What is Wake-On-LAN ? A: The Wake-On-LAN feature provides the capability to remotely power on systems supporting Wake-On-LAN by simply sending a wake-up frame. With this feature, remotely uploading/downloading data to/from systems during off-peak hours will be feasible. Q: What can Wake-On-LAN do for you ? A: Wake-On-LAN is a remote management tool with advantages that can reduce system management workload, provide flexibility to the system administrators job, and then of course save you time-consuming efforts and costs. Q: What components does Wake-On-LAN require to be enable? A: To enable Wake-On-LAN function, your system requires Ethernet LAN adapter card that can activate Wake-On-LAN function, a client with Wake-On-LAN capability, and software such as LDCM Rev. 3.10 or up that can trigger wake-up frame.