Asus P2B-D, P2B-DS User Manual

R

P2B-D / P2B-DS

Dual Pentium® II Motherboards

USER’S MANUAL

Special Features

• P2B-DS

• Adaptec 7890 SCSI Chipset

• Adaptec 3860 SCSI Transceiver

USER'S NOTICE

No part of this manual, including the products and software described in it, may be repro­duced, transmitted, transcribed, stored in a retrieval system, or translated into any language
in any form or by any means, except documentation kept by the purchaser for backup pur­poses, without the express written permission of ASUSTeK COMPUTER INC. (“ASUS”).

ASUS PROVIDES THIS MANUAL “AS IS” WITHOUT WARRANTY OF ANY KIND,
EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED
W ARRANTIES OR CONDITIONS OF MERCHANTABILITY OR FITNESS FOR A PAR­TICULAR PURPOSE. IN NO EVENT SHALL ASUS, ITS DIRECTORS, OFFICERS,
EMPLOYEES OR AGENTS BE LIABLE FOR ANY INDIRECT, SPECIAL, INCIDEN­TAL, OR CONSEQUENTIAL DAMAGES (INCLUDING DAMAGES FOR LOSS OF
PROFITS, LOSS OF BUSINESS, LOSS OF USE OR DATA, INTERRUPTION OF BUSI­NESS AND THE LIKE), EVEN IF ASUS HAS BEEN ADVISED OF THE POSSIBILITY
OF SUCH DAMAGES ARISING FROM ANY DEFECT OR ERROR IN THIS MANUAL
OR PRODUCT.

Product warranty or service will not be extended if: (1) the product is repaired, modified or
altered, unless such repair, modification of alteration is authorized in writing by ASUS; or
(2) the serial number of the product is defaced or missing.

Products and corporate names appearing in this manual may or may not be registered trade­marks or copyrights of their respective companies, and are used only for identification or
explanation and to the owners’ benefit, without intent to infringe.

• Adobe and Acrobat are registered trademarks of Adobe Systems Incorporated.

• Adaptec, AHA, EZ-SCSI, and AIC is a registered trademark of Adaptec, Inc.

• Sound Blaster, SB16, A WE32, A WE64D and SB-LINK are trademarks of Creative T echnology Ltd.

• Intel, LANDesk, and Pentium are registered trademarks of Intel Corporation.

• IBM and OS/2 are registered trademarks of International Business Machines.

• Windows and MS-DOS are registered trademarks of Microsoft Corporation.

• Trend and ChipAwayVirus are trademarks of Trend Micro, Inc.
The product name and revision number are both printed on the product itself. Manual revi-

sions are released for each product design represented by the digit before and after the period
of the manual revision number. Manual updates are represented by the third digit in the
manual revision number.

For previous or updated manuals, BIOS, drivers, or product release information, contact ASUS
at http://www.asus.com.tw or through any of the means indicated on the following page.

SPECIFICATIONS AND INFORMATION CONTAINED IN THIS MANUAL ARE FUR­NISHED FOR INFORMATIONAL USE ONLY, AND ARE SUBJECT TO CHANGE AT
ANY TIME WITHOUT NOTICE, AND SHOULD NOT BE CONSTRUED AS A COM­MITMENT BY ASUS. ASUS ASSUMES NO RESPONSIBILITY OR LIABILITY FOR
ANY ERRORS OR INACCURACIES THA T MAY APPEAR IN THIS MANUAL, INCLUD­ING THE PRODUCTS AND SOFTWARE DESCRIBED IN IT.

Copyright © 1998 ASUSTeK COMPUTER INC. All Rights Reserved.

Product Name: ASUS P2B-D/P2B-DS
Manual Revision: 1.05 E269
Release Date: September 1998

2

ASUS P2B-D/P2B-DS User’s Manual

ASUS CONTACT INFORMATION

ASUSTeK COMPUTER INC.

Marketing

Address: 150 Li-Te Road, Peitou, Taipei, Taiwan 112
Telephone: [phone]
Fax: [phone]
Email: [e-mail]

Technical Support

Fax: [phone]
BBS: [phone]
Email: [e-mail]
WWW: www.asus.com.tw
FTP: ftp.asus.com.tw/pub/ASUS

ASUS COMPUTER INTERNATIONAL

Marketing

Address: 6737 Mowry Ave, Mowry Business Center, Building 2,

Newark, CA 94560, USA
Fax: [phone]
Email: [e-mail]

Technical Support

Fax: [phone]
BBS: [phone]
Email: [e-mail]
WWW: www.asus.com
FTP: ftp.asus.com.tw/pub/ASUS

ASUS COMPUTER GmbH

Marketing

Address: Harkort Str. 25, 40880 Ratingen, BRD, Germany
Telephone: [phone]
Fax: [phone]
Email: [e-mail]

Technical Support

Hotline: [phone]
BBS: 49-2102-448690
Email: [e-mail]
WWW: www.asuscom.de
FTP: ftp.asuscom.de/pub/ASUSCOM

ASUS P2B-D/P2B-DS User’s Manual 3

CONTENTS

I. INTRODUCTION 7

How this Manual is Organized ........................................................... 7

Item Checklist ..................................................................................... 7

II. FEATURES 8

Features ............................................................................................... 8

The ASUS P2B-D/P2B-DS Motherboard........................................... 9

III. INSTALLATION 10

ASUS P2B-D/P2B-DS Motherboard Layout ................................... 10

Installation Steps............................................................................... 12

1. Jumpers ......................................................................................... 12

Jumper Settings ..................................................................... 13

2. System Memory (DIMM) ............................................................ 17

DIMM Memory Installation Procedures ............................... 18

3. Central Processing Unit (CPU).................................................... 19

Pentium II Processor.............................................................. 19

Recommended Heatsinks ............................................................ 23

AAVID Heatsink ................................................................... 23

Elan V ital Heatsink................................................................ 23

4. Expansion Cards ........................................................................... 24

Expansion Card Installation Procedure ................................. 24

Assigning IRQs for Expansion Cards.................................... 24

Assigning DMA Channels for ISA Cards.............................. 25

ISA Cards and Hardware Monitor......................................... 25

Accelerated Graphics Port ..................................................... 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 Motherboard’s 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

4

ASUS P2B-D/P2B-DS User’s Manual

CONTENTS

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 SOFTWARE 58

ASUS Smart Motherboard Support CD............................................ 58

VI. DESKTOP MANAGEMENT 59

Desktop Management Interface (DMI)............................................. 59

VII. ASUS LAN Card 63

ASUS PCI-L101 Fast Ethernet Card ................................................ 63

Features ............................................................................................. 64

Software Driver Support ............................................................. 64

Question and Answer .................................................................. 64

VIII. ADAPTEC SCSI SELECT 65

Configuring the SCSI Adapter.......................................................... 65

SCSI Disk Utilities ...................................................................... 65

IX. ADAPTEC EZ-SCSI 67

Quick Start Instructions .................................................................... 67

Troubleshooting Tips ........................................................................ 68

Information for DOS/Windows 3.1x Users ...................................... 71

DOS Formatting Utilities ............................................................ 72

Low-level Formatter (scsifmt)............................................... 72

Formatter and Partitioner (afdisk) ......................................... 73

ASUS P2B-D/P2B-DS User’s Manual 5

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.

6

ASUS P2B-D/P2B-DS User’s Manual

I. INTRODUCTION

How this Manual is Organized

This manual is divided into the following sections:

I. Introduction Manual information and checklist
II. Features Information and specifications
III. Installation Setting up the motherboard.
IV. BIOS Software Setting up the BIOS software
V. Support Software ASUS Smart Motherboard Support CD
VI. Desktop Management BIOS supported Desktop Management Interface
VII. ASUS LAN Card ASUS PCI-L101 Fast Ethernet PCI card installation (optional)
VIII. Adaptec SCSI Select Adaptec SCSI Select utility (optional)
IX. Adaptec EZ-SCSI Adaptec EZ-SCSI utility (optional)

Item Checklist

Check that your package is complete. If you discover damaged or missing items,
contact your retailer.

Manual / Checklist

I. INTRODUCTION

(1) ASUS Motherboard
(1) Dual Processor Retention Mechanism and heatsink for 440BX AGPset
(4) Attach mount screws
(1) IDE ribbon cable for master and slave drives
(1) Floppy ribbon cable for (1) 5.25inch floppy and (2) 3.5inch floppies
(1) Bag of spare jumpers
(1) Support drivers and utilities:
(1) User’s Manual
(1) ASUS -P2T PC100 Rev. 1.02 or later

(1) Adaptec 7800 Family Manager Set User’s Manual (optional)
68-pin Ultra2 SCSI cable with terminator (optional)
68-pin Fast & Wide SCSI cable (optional)
50-pin Fast SCSI cable (optional)
PS/2 Mouse, Infrared, USB1, and USB2 external connector module (optional)
ASUS PCI-L101 Wake-On-LAN 10/100 Ethernet Card (optional)

ASUS P2B-D/P2B-DS User’s Manual 7

Features

The ASUS P2B-D/P2B-DS motherboards are carefully designed for the demanding PC user
who wants advanced features processed by the fastest CPU.

• Multi-Speed: Supports Dual Intel Pentium

• Intel AGPset: Features Intel’s 440BX AGPset with I/O subsystems and front-side bus

• Enhanced ACPI and Anti-Boot Virus BIOS: Features a programmable BIOS, offering

II. FEATURES

Specifications

• PC100 Memory Support: Equipped with four DIMM sockets to support Intel PC100-

• Wake-On-LAN: Supports Wake-On–LAN activity with special network cards, such as

• Adaptec SCSI Chipset: Features Adaptec AIC-7890 Ultra2 SCSI chipset (optional) that

• AGP Slot: Supports Accelerated Graphics Port cards for high performance, component

• SB-Link™: Features Creative’s SB-Link™, allowing SB16 compatibility, using Intel’s

• SMBus: Features the System Management Bus interface, which is used to physically

• PCI & ISA Expansion Slots: Provides four 32-bit PCI and two 16-bit ISA PCI slots.

• Intelligence: Supports Keyboard Power Up, Fan Status Monitoring and Alarm, Tem-

• Super Multi-I/O: Provides two high-speed UART compatible serial ports and one paral-

• Desktop Management Interface (DMI): Supports DMI through BIOS, which allows

• Ultra DMA/33 Bus Master IDE/Floppy: Comes with an onboard PCI Bus Master IDE

• 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

®

II processors from 233MHz to 450MHz.

(FSB) platform, which boosts the traditional 66-MHz internal bus speed to 100MHz.

enhanced ACPI for Windows 98 compatibility , built-in hardware-based virus protection through
Trend ChipAwayVirus, and autodetection of most devices for virtually automatic setup.

compliant SDRAMs (8, 16, 32, 64, 128, or 256MB) up to 1GB. These new SDRAMs are
necessary to meet the enhanced 100MHz bus speed requirement.

the ASUS PCI-L101 10/100 Fast Ethernet PCI card.

supports a combination of 8-bit and 16-bit Ultra2, Ultra, and single-ended or standard
SCSI devices and the AIC-3860 transceiver chipset (optional) that bridges the compat­ibility gap between these mixed environments without affecting system performance by
taking advantage of the benefits of low-voltage differential (LVD) technology.

level interconnect targeted at 3D graphical display applications.

PC-PCI and serialized IRQ protocols, to AWE64D or compatible PCI audio cards.

transport commands and information between SMBus devices.

perature Monitoring and Alert, Voltage Monitoring and Alert, System Resources Alert,
and Virus Write Protection through the onboard Hardware Monitor , Intel LANDesk Cli­ent Manager (LDCM), and ASUS PC Probe software.

lel port with EPP and ECP capabilities. UART2 can also be directed from COM2 to the
Infrared Module for wireless connections.

hardware to communicate within a standard protocol creating a higher level of compat­ibility. (Requires DMI-enabled components.) (See section V)

controller with two connectors that supports 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. Two floppy drives of either 5.25inch or 3.5inch (1.44MB or 2.88MB)
are also supported without an external card. Supports Japanese standard “Floppy 3 mode”
(3.5-inch disk drive: 1.44MB, 1.2MB, 720KB) and LS-120 floppy disk drives (3.5-inch disk
drive: 120 MB). BIOS supports IDE CD-ROM or SCSI device boot-up.

8 ASUS P2B-D/P2B-DS User’s Manual

II. FEATURES

The ASUS P2B-D/P2B-DS Motherboard

Floppy Connector

Intel 440BX AGPsetSEC CPU Slots 4 DIMM Sockets

T: PS/2 Mouse
B: PS/2 Keyboard

T: USB Port 1
B: USB Port 2

COM 1
(Bottom)

Parallel (Top)
Serial (Bottom)

COM 2
(Bottom)

IDE Connectors
Accelerated

Graphics Port

Multi-I/O Chip

4PCI Slots
Programmable

2Mbit Flash ROM

Hardware
Monitor

2 ISA Slots

II. FEATURES

Motherboard Parts

Adaptec AIC-7890 Ultra2 &
Ultra-Fast/Wide SCSI Chipset
(optional)

Intel PIIX4E PCIset

68-pin Wide SCSI Connector

68-pin Ultra2 SCSI
Connector

50-pin Narrow SCSI
Connector

ASUS P2B-D/P2B-DS User’s Manual 9

III. INSTALLATION

ASUS P2B-D/P2B-DS Motherboard Layout

III. INSTALLATION

Board Layout

PS/2

MOUSE (TOP PORT)
KEYBOARD (BOTTOM)

USB

USB 1

(TOP PORT)

USB 2 (BOTTOM)

COM 1

CPU_FAN

Keyboard Power

ATX Power Connector

Intel

440BX

AGPset

PARALLEL PORT

COM 2

FIR

CIR

Multi-I/O

Chip

SB-LINK™

Connector

2Mbit Flash EEPROM

(Programmable BIOS)

RT2

Hardware

Monitor

Wake-On-LAN

NOTE: Greyed components are optional/reserved for future use.

Single Edge Contact Slot for CPU 1

JP4

JP5

Accelerated Graphics Port

PCI Slot 1

PCI Slot 2

PCI Slot 3

PCI Slot 4

S82093AA

SMB

Chipset

ISA Slot 1

ISA Slot 2

Single Edge Contact Slot for CPU 2

PWR_FAN

50-Pin SCSI Connector

R

Adaptec

AIC-7890AB

Chipset

JP6

FS0

FS1

FS2

BUS FREQ

Adaptec
AIC-3860

Transceiver

68-Pin Wide SCSI Connector

35

1

1

35

1

68-Pin Ultra2 SCSI Connector

Intel

PIIX4E

Chipset

Floppy Disk Drives

1

DIMM Socket 3 (64 bit, 168 pin module)

DIMM Socket 2 (64 bit, 168 pin module)

DIMM Socket 1 (64 bit, 168 pin module)

DIMM Socket 0 (64 bit, 168 pin module)

68

Primary IDE

34

Secondary IDE

68
34

CMOS Power

(CR2032 3V
Lithium Cell)

IDELED

BF3

BF2

BF1

BF0

ASUS

A97127F

Chipset

CHA_FAN

CLRTC

Panel Connector

JP18

CHASSIS
EXTBATT

IrDA

10 ASUS P2B-D/P2B-DS User’s Manual

III. INSTALLATION

Jumpers

1) CLRTC p. 13 Clear Real Time Clock (RTC) RAM

2) KBPWR p. 13 Keyboard Power Up (Enable/Disable)

3) FS0, FS1, FS2 p. 14 CPU Bus Frequency

4) CF1, CF2, CF3, CF4 p. 14 CPU Core:Bus Frequency Multiple

5) JP18 p. 15 Chassis Intrusion Sensor Setting (Enable/Disable)

Expansion Slots/Sockets

1) DIMM Sockets p. 18 DIMM Memory Support

2) SEC CPU Slot p. 19 Single Edge Contact CPU Support

3) SLOT1, SLOT2 p. 24 16-bit ISA Bus Expansion Slots

4) PCI1, PCI2, PCI3, PCI4 p. 25 32-bit PCI Bus Expansion Slots

5) AGP p. 25 Accelerated Graphics Port

Hardware Monitor

1) JP4, JP5 p. 22 CPU heat Sensor Connector (O/R)

Connectors

1) PS2KBMS p. 26 PS/2 Keyboard Connector (6-pin female)

2) PS2KBMS p. 26 PS/2 Mouse Connector (6-pin female)

3) PRINTER p. 27 Parallel (Printer) Port Connector (25-pin female)

4) COM1/COM2 p. 27 Serial Port COM1/COM2 (two 9-pin male)

5) FLOPPY p. 27 Floppy Drive Connector (34-1 pins)

6) USB p. 28 Universal Serial BUS Ports 1 & 2 (two 4-pin female)

7) Primary/Secondary IDE p. 28 Primary/Secondary IDE Connector (40 pins)

8) IDELED p. 29 IDE/SCSI LED Activity Light (2 pins)

9) CHA_/CPU_/PWR_F AN p. 29 Chassis/CPU/Power Supply Fan Connectors (3-pin block)

10) IR p. 30 Infrared Port Module Connector (5 pins)

11) ATXPWR p. 30 ATX Motherboard Power Connector (20 pins)

12) WOLCON p. 31 Wake-On-LAN Connector (3 pins)

13) CHASSIS p. 31 Chassis Intrusion Sensor Lead (4-1 pins) (O/R)

14) MSG.LED (PANEL) p. 32 LED Lead (2 pins)

15) SMI (PANEL) p. 32 SMI Suspend Switch Lead (2 pins)

16) PWR.SW (PANEL) p. 32 ATX Power Switch / Soft Power Switch (2 pins)

17) RESET (PANEL) p. 32 Reset Switch Lead (2 pins)

18)

PWR.LED (

19)

KEYLOCK (

20) SPEAKER (PANEL) p. 32 Speaker Connector (4 pins)

21) SCSI-50/SCSI-68/UL TRA2-68 p. 33 Ultra-Fast (50-)/-Wide (68-)/Ultra2 (68-pin) SCSI Connectors

22) DMA_HEADER p. 34 SB-LINK™ Connector (6-1 pins) (O/R)

23) SMB p. 34 SMBus Connector (3 pins) (O/R)

PANEL

PANEL

)

)

p. 32 System Power LED (3 pins)
p. 32 Keyboard Lock Switch Lead (2 pins)

*

†

Board Layout

III. INSTALLATION

*

The onboard hardware monitor uses the address 290H-297H so legacy ISA cards must not use this

address, otherwise conflicts will occur.
O/R: Optional/Reserved for future use.

ASUS P2B-D/P2B-DS User’s Manual 11

III. INSTALLATION

Jumpers

III. INSTALLATION

Installation Steps

Before using your computer, you must complete the following steps:

1. Set Jumpers on the Motherboard

2. Install System Memory Modules

3. Install the Central Processing Unit (CPU)

4. Install Expansion Cards

5. Connect Ribbon Cables, Cabinet Wires, and Power Supply

6. Setup the BIOS Software

1. Jumpers

Several hardware settings are made through the use of jumper caps to connect jumper
pins (JP) on the motherboard. See motherboard layout for locations of jumpers.
The jumper settings will be described numerically, such as [----], [1-2], [2-3] for no
connection, connect pins 1&2, and connect pins 2&3, respectively. A “1” is written
besides pin 1 on jumpers with three pins. The jumpers will also be shown graphi-

cally such as

to connect pins 1&2 and to connect pins 2&3. Jumpers

with two pins will be shown as
manufacturing simplicity, the jumpers may be sharing pins from other groups. Use
the diagrams in this manual instead of following the pin layout on the board. Set­tings with two jumper numbers require that both jumpers be moved together. To
connect the pins, simply place a plastic jumper cap over the two pins as diagrammed.

W ARNING! Computer motherboards , baseboards and components, such as SCSI

cards, contain very delicate Integrated Circuit (IC) chips. To protect them against
damage from static electricity , you should follow some precautions whenever you
work on your computer.

1. Unplug your computer when working on the inside.

2. Use a grounded wrist strap before handling computer components. If you do
not have one, touch both of your hands to a safely grounded object or to a
metal object, such as the power supply case.

for Short (On) and for Open (Off). For

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.

12 ASUS P2B-D/P2B-DS User’s Manual

III. INSTALLATION

Jumper Settings

1. Clear Real Time Clock (RTC) RAM (CLRTC)

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

R

1

1

Short the solder points to clear CMOS

P2B-D/DS Real Time Clock RAM (CLRTC)

2. Keyboard Power Up (KBPK)

This allows you to disable or enable the keyboard power up function. Set to
Enable if you want to use your keyboard (by pressing <Spacebar>) to power up
your computer. This feature requires an ATX power supply that can supply at
least 300mA on the +5VSB lead and the new ACPI BIOS support. The default is
set to Disable because not all computers have the appropriate ATX power sup­ply. Your computer will not function if you set this to Enable and if you do not
have the right ATX power supply.

1

23 1

Disable

R

(Default)

23

Enable

Jumpers

III. INSTALLATION

1

1

P2B-D/DS Keyboard Power Up

ASUS P2B-D/P2B-DS User’s Manual 13

III. INSTALLATION

3. CPU Bus Frequency (FS0, FS1, FS2)

This option tells the clock generator what frequency to send to the CPU, DRAM, and
440BX AGPset. This allows the selection of the CPU’s External frequency (or BUS
Clock). The BUS Clock multiplied by the BUS Ratio equals the CPU’s Internal fre-
quency (the advertised CPU speed).

4. CPU Core:BUS Frequency Multiple (BF0, BF1, BF2, BF3)

This option sets the frequency ratio between the Internal frequency of the CPU
and the CPU’s External frequency. These must be set in conjunction with the

CPU Bus Frequency.

III. INSTALLATION

Jumpers

R

1

1

P2B-D/DS CPU Settings

123

50MHz

FS0
FS1
FS2

123

66MHz

CPU Bus Frequency

123 123

BF3
BF2
BF1
BF0

2.0x (2/1) 2.5x (5/2) 3.0x (3/1) 3.5x (7/2) 4.0x (4/1) 4.5x (9/2) 5.0x (5/1)

CPU Core:Bus Frequency Multiple

123
FS0
FS1
FS2

75MHz 83MHz 100MHz 103MHz

123 123
BF3
BF2
BF1
BF0

FS0
FS1
FS2

BF3
BF2
BF1
BF0

123

FS0
FS1
FS2

BF3
BF2
BF1
BF0

123

123

FS0
FS1
FS2

BF3
BF2
BF1
BF0

123

123 123

FS0
FS1
FS2

BF3
BF2
BF1
BF0

123

112MHz

WARNING! Frequencies above 10 0MHz exceed the specifications for the on-

board 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:

FS0
FS1
FS2

(BUS Freq.) (Freq. Ratio)

CPU Model Freq. Ratio BUS F. FS2 FS1 FS0 BF3 BF2 BF1 BF0

Intel Pentium II 450MHz 4.5x 100MHz [1-2] [1-2] [1-2] [2-3] [1-2] [2-3] [1-2]
Intel Pentium II 400MHz 4.0x 100MHz [1-2] [1-2] [1-2] [2-3] [1-2] [2-3] [2-3]
Intel Pentium II 350MHz 3.5x 100MHz [1-2] [1-2] [1-2] [2-3] [2-3] [1-2] [1-2]

Intel Pentium II 333MHz 5.0x 66MHz [2-3] [1-2] [1-2] [2-3] [1-2] [1-2] [2-3]
Intel Pentium II 300MHz 4.5x 66MHz [2-3] [1-2] [1-2] [2-3] [1-2] [2-3] [1-2]
Intel Pentium II 266MHz 4.0x 66MHz [2-3] [1-2] [1-2] [2-3] [1-2] [2-3] [2-3]
Intel Pentium II 233MHz 3.5x 66MHz [2-3] [1-2] [1-2] [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.

14 ASUS P2B-D/P2B-DS User’s Manual

5. Chassis Intrusion Sensor Setting (JP18) (optional/reserved)

This allows you to disable or enable the chassis intrusion sensor . Set to Enable if
you want to use this function to monitor intrusion into your computer, for ex­ample, when the drive bay doors are opened. The default is set to Disable.

JP18 JP18

R

Disable

1

1

(Default)

P2B-D/DS Chassis Intrusion Sensor Setting

Enable

Jumpers

III. INSTALLATION

ASUS P2B-D/P2B-DS User’s Manual 15

(This page was intentionally left blank.)

16 ASUS P2B-D/P2B-DS User’s Manual

III. INSTALLATION

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 and 1G B. One side (with memory chips) of the DIMM takes up
one row on the motherboard.

To utilize the chipset’s 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 168-pin DIMM Memory Modules Total Memory

Socket 1 (Rows 0&1) SDRAM 8, 16, 32, 64, 128, 256MB x1
Socket 2 (Rows 2&3) SDRAM 8, 16, 32, 64, 128, 256MB x1
Socket 3 (Rows 4&5) SDRAM 8, 16, 32, 64, 128, 256MB x1
Socket 4 (Rows 6&7) SDRAM 8, 16, 32, 64, 128, 256MB x1

Total System Memory (Max 1GB) =

ASUS Memory 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 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; double-sided come in 32, 64, 128, 256MB.

System Memory

III. INSTALLATION

ASUS P2B-D/P2B-DS User’s Manual 17

III. INSTALLATION

DIMM Memory Installation Procedures

Insert the module(s) as shown. Because the number of pins is 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.

R

III. INSTALLATION

System Memory

P2B-D/DS 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)

1

1

DRAM Key Position

RFU

Buffered

Unbuffered

20 Pins

Voltage Key Position

5.0V

60 Pins

(FRONT)

Reserved

3.3V

88 Pins

Lock

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.

18 ASUS P2B-D/P2B-DS User’s Manual

III. INSTALLATION

3. Central Processing Unit (CPU)

This motherboard provides two Single Edge Contact (SEC) slots for Pentium II
processors packaged in SEC cartridges.

Pentium II Processor

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

Lock Holes

Captive Nut

Attach Mount BridgesPentium II Retention Mechanism

The recommended heatsinks (see section on recommended heatsinks for more in­formation) for the Pentium II processor are those with three-pin fans that can be
connected to the fan connectors on the motherboard.

WARNING! Be sure that there is sufficient air circulation across the processor’s

heatsink by regularly checking that your CPU fan is working. W ithout sufficient
circulation, the processor could overheat and damage both the processor and the
motherboard. You may install an auxiliary fan, if necessary.

Other Important Items

Intel Pentium II Processor in an SEC cartridge
(233-450MHz)

CPU

III. INSTALLATION

ASUS C-P2T PC100 CPU Termination Card

ASUS P2B-D/P2B-DS User’s Manual 19

III. INSTALLATION

PWR_FA

JP4

JP5

Intel

440BX

AGPset

Single Edge Contact Slot for CPU 1

Single Edge Contact Slot for CPU 2

B

CPU

III. INSTALLATION

Installing the Pentium II Processor

1. Connect the Heat Sensor Cable to JP4/JP5 (optional): If you purchased the

specially designed fan and thermal monitor heatsinks, you may connect the heat
sensor cables to the motherboard’s CPU heat sensor connectors (JP4/JP5) now.

NOTE: If you are installing only one processor, you may use JP5 to connect a
heat sensor cable to monitor the power supply temperature to make sure that it is
operating at a safe heat level. This feature is available only with the hardware
monitor installed.

JP4

Heat Sensor Connector for CPU 1

R

1

1

Heat Sensor Connector for CPU 2

P2B-D/DS CPU Heat Sensor Connectors

JP5

2. Insert the Attach Mount Scr ews: Insert the screws through the motherboard’s

underside at the location indicated. Press the screws gently but firmly until it is
fully inserted. Do not rock the screws side to side, instead press the screws straight
into the holes.

Rib

Rib

NOTE: Insert the
screws into the
encircled areas.

20 ASUS P2B-D/P2B-DS User’s Manual

III. INSTALLATION

3. Mount the Dual Processor Retention Mechanism: The dual processor reten­tion mechanism is designed to fit into the SEC slots only one way.

Be sure to align the notches in the retention mechanism with the small ribs (see
preceding figure) on each side of the slots and that the mechanism is properly
seated on the board. Then, screw the captive nuts in place.

WARNING! Do not overtighten the captive nuts. Doing so could damage your

motherboard. Tighten captive nuts to no more than 6±1 inch/pound.

Captive nut

Captive nut

4. Mount the Heatsink: Place the SEC cartridge face down on a flat surface and lay
the heatsink flush on the back (metal side) of the SEC cartridge. Be sure that the
heatsink is firmly pressed against the SEC cartridge. When correctly installed,
no light can be seen between the thermal pad of the heatsink and the SEC car­tridge.

IMPORTANT: The heatsinks must not be more than 2.8 cm (1.1 inch) thick.

WARNING! If the heatsink is not mounted tightly against the SEC cartridge,

the CPU will overheat. You may install an auxiliary fan to provide adequate
circulation across the processor’s passive heatsink.

Push each end of the clamps until they lock

CPU

III. INSTALLATION

Lock

The thermal pad & SEC cartridge should not have a gap!

SEC Cartridge with Heatsink (Top View)

Lock

ASUS P2B-D/P2B-DS User’s Manual 21

III. INSTALLATION

CPU

III. INSTALLATION

5. Insert the SEC Cartridge: Push the SEC cartridge’s two locks inward until

you hear a click (the preceding picture shows the locks in the outward position
and inward in the picture below). With the heatsink facing the motherboard’s
chipset, press the cartridge gently but firmly until it is fully inserted. (NOTE:
The procedures shown here are for installing the AAVID heatsink with fan.)

Push lock inward

IMPORTANT: If you are installing only one processor , you must install it in the SEC
slot for CPU 1 (slot closest to the external connectors). Then terminate the empty slot
with the ASUS C-P2T PC100 CPU termination card to maintain signal strength.

IMPORTANT: Use only the ASUS C-P2T PC100 CPU termination card (Rev. 1.02

or later) to terminate the empty slot.

6. Secure the SEC Cartridge: Secure the SEC cartridge in place by pushing the

SEC cartridge locks outward so that the lock shows through the retention
mechanism’s lock holes.

lock holes

22 ASUS P2B-D/P2B-DS User’s Manual

III. INSTALLATION

Recommended Heatsinks

The recommended heatsinks for the Pentium II processor are those with three-pin
fans that can be connected to the CPU fan connector on the motherboard. These
heatsinks have the added benefits of proper heat dissipation and with the LM78
hardware monitor, the ability to monitor the fan’s RPM and use the alert function
through the included LANDesk Client Manager (LDCM) software.

IMPORTANT: The heatsinks must not be more than 2.8 cm (1.1 inch) thick.

↑

2.8 cm (1.1 inch)

↓

AAVID Heatsink

Elan Vital Heatsink

CPU

III. INSTALLATION

The procedures for installing the Elan Vital heatsink with fan is also similar to the
steps for installing the AAVID heatsink. The Elan Vital heatsink, however, comes
with a lever to clamp the heatsink into the SEC cartridge. Mount the heatsink in the
orientation as shown then flip the lever from “Unlock” to “Lock.”

ASUS P2B-D/P2B-DS User’s Manual 23

4. Expansion Cards

WARNING! Unplug your power supply when adding or removing expansion

cards or other system components. Failure to do so may cause severe damage to
both your motherboard and expansion cards.

Expansion Card Installation Procedure

1. Read the documentation for your expansion card and make any necessary

2. Remove your computer system’s cover and the bracket plate on the slot you

3. Carefully align the card’s connectors and press firmly.

4. Secure the card on the slot with the screw you removed above.

5. Replace the computer system’s cover.

III. INSTALLATION

Expansion Cards

6. Set up the BIOS if necessary

7. Install the necessary software drivers for your expansion card.

III. INSTALLATION

hardware or software settings for your expansion card, such as jumpers.
intend to use. Keep the bracket for possible future use.

(such as IRQ xx Used By ISA: Yes in PNP AND PCI SETUP)

Assigning IRQs for Expansion Cards

Some expansion cards need to use an IRQ to operate. Generally, an IRQ must be
exclusively assigned to one use. In a standard design, there are 16 IRQs available
but most of them are already in use, leaving 6 IRQs free for expansion cards. 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 card’ s 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 W in­dows directory to see a map of your used and free IRQs. If you use W indows 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.

24 ASUS P2B-D/P2B-DS User’s Manual

III. INSTALLATION

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. T o install a PCI card, you
need to set the INT (interrupt) assignment. Since all the PCI slots on this mother­board use an INTA #, set the jumpers on your PCI cards to INT A.

Assigning DMA Channels for ISA Cards

Some ISA cards, both legacy and PnP, may also need to use a DMA (Direct Memory
Access) channel. DMA assignments for this motherboard are handled the same way
as the IRQ assignment process described earlier. You can select a DMA channel in
the PCI and PnP configuration section of the BIOS Setup utility.

IMPORTANT: To avoid conflicts, reserve the necessary IRQs and DMAs for legacy
ISA cards (under PNP AND PCI SETUP of the BIOS SOFTWARE, choose Yes in IRQ
xx Used By ISA and DMA x Used By ISA for those IRQs and DMAs you want to reserve).

ISA Cards and Hardware Monitor

The onboard hardware monitor uses the address 290H-297H so legacy ISA cards
must not use this address or else conflicts will occur.

Accelerated Graphics Port

This motherboard provides an accelerated graphics port (AGP) slot to support a new
generation of graphics cards with ultra-high memory bandwidth, such as the ASUS
AGP-V2740 3D Multimedia Accelerator.

AGP

III. INSTALLATION

R

1

1

P2B-D/DS Accelerated Graphics Port (AGP)

ASUS P2B-D/P2B-DS User’s Manual 25

III. INSTALLATION

Connectors

III. INSTALLATION

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 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.

PS/2 Keyboard (6-pin Female)

2. PS/2 Mouse Connector (6-pin Female)

The system will direct IRQ12 to the PS/2 mouse if one is detected. If not de­tected, expansion cards can use IRQ12. See “PS/2 Mouse Function Control” in
BIOS Features Setup of the BIOS SOFTWARE.

PS/2 Mouse (6-pin Female)

26 ASUS P2B-D/P2B-DS User’s Manual

III. INSTALLATION

3. Parallel Printer Connector (25-pin Female)

You can enable the parallel port and choose the IRQ through “Onboard Parallel
Port” in Chipset Features Setup of the BIOS SOFTWARE. NOTE: Serial print­ers must be connected to the serial port.

Parallel (Printer) Port (25-pin Female)

4. Serial Port COM1 and COM2 Connectors (Two 9-pin Male)

The two serial ports can be used for pointing devices or other serial devices. See
“Onboard Serial Port...” in Chipset Features Setup of the BIOS SOFTWARE.

COM 1 COM 2

Serial Ports (9-pin Male)

5. Floppy Disk Drive Connector (34-1pin FLOPPY)

This connector supports the provided floppy disk drive ribbon cable. After con­necting the single end to the board, connect the two plugs on the other end to the
floppy drives. (Pin 5 is removed to prevent inserting in the wrong orienta-

tion when using ribbon cables with pin 5 plugged).

R

1

1

NOTE: Orient the red stripe on the
floppy ribbon cable to Pin 1

Floppy Drive Connector

Pin 1

Connectors

III. INSTALLATION

P2B-D/DS Floppy Disk Drive Connector

ASUS P2B-D/P2B-DS User’s Manual 27

III. INSTALLATION

Connectors

III. INSTALLATION

6. Universal Serial BUS Ports 1 & 2 (Two 4-pin Female)

Two USB ports are available for connecting USB devices.

USB 1

Universal Serial Bus (USB) 2

7. Primary / Secondary IDE connectors (Two 40-1pin IDE)

These connectors support the provided IDE hard disk ribbon cable. After con­necting the single end to the board, connect the two plugs at the other end to
your hard disk(s). If you install two hard disks, you must configure the second
drive to Slave mode by setting its jumper accordingly. Please refer to the docu­mentation of your hard disk for the jumper settings. BIOS now supports SCSI
device or IDE CD-ROM bootup (see “HDD Sequence SCSI/IDE First” & “Boot
Sequence” in the BIOS Features Setup of the BIOS SOFTWARE) (Pin 20 is

removed to prevent inserting in the wrong orientation when using ribbon
cables with pin 20 plugged).

TIP: You may configure two hard disks to be both Masters using one ribbon

cable on the primary IDE connector and another ribbon cable on the secondary
IDE connector. You may install one operating system on an IDE drive and an­other on a SCSI drive and select the boot disk through BIOS Features Setup.

NOTE: Orient the red stripe on the

R

1

1

P2B-D/DS IDE Connectors

IDE ribbon cable to Pin 1

Primary IDE Connector

PIN 1

Secondary IDE Connector

28 ASUS P2B-D/P2B-DS User’s Manual

III. INSTALLATION

8. Hard Disk Activity LED (2-pin IDELED)

This connector supplies power to the cabinet’s hard disk or IDE activity LED.
Read and write activity by devices connected to the Primary or Secondary IDE
connectors will cause the LED to light up.

R

1

1

TIP: If the case-mounted LED does not light,
try reversing the 2-pin plug.

IDE_LED

P2B-D/DS IDE Activity LED

9. Chassis, CPU, & Power Supply Fan Connectors (3-pin FAN)

These connectors support cooling fans of 500mA (6W) or less. Orientate the
fans so that the heat sink fins allow airflow to go across the onboard heatsink(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 fan’ s plug to the board taking into consideration
the polarity of the this connector.

NOTE: The “Rotation” signal must only be used with fans specially designed
with rotation signal.

Connectors

III. INSTALLATION

WARNING! The CPU and/or motherboard will overheat if there is no airflow

across the CPU and onboard heatsinks. Damage may occur to the motherboard
and/or the CPU fan if these pins are incorrectly used. These are not jumpers,

do not place jumper caps over these pins.

Rotation

+12V

Ground

CPU Fan Power

Power Supply

R

1

1

Fan Power

P2B-D/DS 12Volt Cooling Fan Power

NOTE: If you are installing two

processors, you may connect
the fan from the second heatsink
to either the power supply or
chassis fan connector.

+12V

Ground

Rotation

Chassis

Fan Power

ASUS P2B-D/P2B-DS User’s Manual 29

III. INSTALLATION

10. IrDA-Compliant infrared module connector (5-pin IR)

This connector supports the optional wireless transmitting and receiving infrared
module. This module mounts to a small opening on system cases that support this
feature. You must also configure the setting through “UART2 Use Infrared” in
Chipset Features Setup to select whether UAR T2 is directed for use with COM2
or IrDA. Use the five pins as shown on the Back V iew and connect a ribbon cable
from the module to the motherboard according to the pin definitions.

III. INSTALLATION

Connectors

Back View

IRTX
GND

+5V
(NC)

IRRX

+5V

(NC)

IRRX

R

1

1

GND

IRTX

P2B-D/DS Infrared Module Connector

Front View

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

11. 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 but gently making sure that
the pins are aligned.

R

1

1

P2B-D/DS ATX Power Connector

-5.0 Volts

+5.0 Volts

+5.0 Volts

+12.0Volts

Power Good

+5V Standby

Ground

Ground

Ground

+5.0 Volts

Ground

Ground

+3.3Volts

-12.0Volts

Ground

Power Supply On

Ground

+3.3 Volts

+3.3 Volts

+5.0 Volts

IMPORTANT: Make sure that your ATX power supply can supply at least
10mAmp on the 5-volt standby lead (+5VSB). You may experience difficulty in
powering on your system if your power supply cannot support the load. For
W ake on LAN support, your ATX power supply must supply at least 720mAmp.

30 ASUS P2B-D/P2B-DS User’s Manual