R
P2B-L / P2B-S / P2B-LS
®
Pentium II Motherboards
USER’S MANUAL
Special Features
ASUS P2B-L (power supply must provide at least 720mA on the +5VSB)
• Intel 82558 LAN Chipset
• Wake-On-LAN
ASUS P2B-S
• Adaptec 7890 SCSI Chipset
• Adaptec 3860 SCSI Transceiver
ASUS P2B-LS (power supply must provide at least 720mA on the +5VSB)
• Intel 82558 LAN Chipset
• Wake-On-LAN
• Adaptec 7890 SCSI Chipset
• Adaptec 3860 SCSI Transceiver
ASUS CONTACT INFORMATION
ASUSTeK COMPUTER INC.
Marketing
Address:
Telephone:
Fax:
150 Li-Te Road, Peitou, Taipei, Taiwan 112
+886-2-2894-3447
+886-2-2894-3449
Email:
Technical Support
Fax:
+886-2-2895-9254
BBS:
Email:
WWW:
FTP:
+886-2-2896-4667
ftp.asus.com.tw/pub/ASUS
ASUS COMPUTER INTERNATIONAL
Marketing
Address:
6737 Mowry Avenue, Mowry Business Center, Building 2
Newark, CA 94560, USA
+1-510-608-4555
Fax:
Email:
Technical Support
Fax:
+1-510-608-4555
BBS:
Email:
WWW:
FTP:
+1-510-739-3774
ftp.asus.com.tw/pub/ASUS
ASUS COMPUTER GmbH
Marketing
Address:
Telephone:
Fax:
Harkort Str. 25, 40880 Ratingen, BRD, Germany
49-2102-445011
49-2102-442066
Email:
Technical Support
Hotline:
BBS:
49-2102-499712
49-2102-448690
Email:
WWW:
FTP:
ftp.asuscom.de/pub/ASUSCOM
ASUS P2B-L/P2B-S/P2B-LS User’s Manual
3
CONTENTS
I. INTRODUCTION
How this Manual is Organized ........................................................... 7
Item Checklist ..................................................................................... 7
II. FEATURES
Features ............................................................................................... 8
ASUS P2B-L/P2B-S/P2B-LS Motherboard ....................................... 9
III. INSTALLATION
ASUS P2B-L/P2B-S/P2B-LS 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
AAVID Heatsink ................................................................... 23
Elan Vital Heatsink ................................................................ 23
4. Expansion Cards ........................................................................... 24
Expansion Card Installation Procedure ................................. 24
Assigning IRQs for Expansion Cards.................................... 24
Assigning DMA Channels for ISA Cards.............................. 25
ISA Cards and Hardware Monitor ......................................... 25
Accelerated Graphics Port ..................................................... 25
5. External Connectors..................................................................... 26
Power Connection Procedures .................................................... 35
IV. BIOS SOFTWARE
Main Menu ............................................................................ 36
Flash Memory Writer Utility ............................................................ 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
Power Management Setup........................................................... 49
Details of Power Management Setup .................................... 49
4
ASUS P2B-L/P2B-S/P2B-LS User’s Manual
CONTENTS
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
Support CD Main Menu .............................................................. 58
Main Menu Selections ........................................................... 59
Other CD Directories............................................................. 59
VI. DMI Utility
Desktop Management Interface (DMI)............................................. 60
VII. NETWORK INTERFACE
Features ....................................................................................... 63
Software Driver Support ............................................................. 63
LED Connectors .......................................................................... 64
DOS and Windows 3.1 Setup for Novell .......................................... 65
Windows NT Server or Workstation ................................................. 66
Windows 95 ...................................................................................... 68
Select Duplex Mode (optional) ......................................................... 69
Troubleshooting ................................................................................ 71
Technical Information ....................................................................... 74
Using Wake On LAN ........................................................................ 75
Glossary ............................................................................................ 76
VIII. ADAPTEC SCSI SELECT
Configuring the SCSI Adapter .......................................................... 77
SCSI Disk Utilities ...................................................................... 77
IX. ADAPTEC EZ-SCSI UTILITY
Quick Start Instructions .................................................................... 79
Troubleshooting Tips ........................................................................ 80
Information for DOS/Windows 3.1x Users ...................................... 83
DOS Formatting Utilities ............................................................ 84
Low-level Formatter (scsifmt)............................................... 84
Formatter and Partitioner (afdisk) ......................................... 85
ASUS P2B-L/P2B-S/P2B-LS 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 installa-
tion. 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 inter-
ference 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 Cana-
dian Department of Communications.
6
ASUS P2B-L/P2B-S/P2B-LS 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
IV. BIOS Software
Instructions on setting up the motherboard.
Instructions on setting up the BIOS software
ASUS Smart Motherboard Support CD
BIOS supported Desktop Management Interface
Information on the built-in LAN controller (optional)
Adaptec SCSI Select utility (optional)
Adaptec EZ-SCSI utility (optional)
V.
Support Software
VI. DMI Utility
VII. Network Interface
VIII. Adaptec SCSI Select
IX. Adaptec EZ-SCSI
Item Checklist
Check that your package is complete. If you discover damaged or missing items,
contact your retailer.
(1) ASUS Motherboard
(1) Retention mechanism & heatsink support for CPU and heatsink
(2) Attach mount bridges
(1) IDE ribbon cable for master and slave drives
(1) Floppy ribbon cable for (1) 5.25inch floppy and (2) 3.5inch floppies
(1) Spare jumpers
(1) Support drivers and utilities
(1) User’s Manual
68-pin Ultra2 SCSI cable with terminator (optional)
68-pin Fast & Wide SCSI cable (optional)
50-pin Fast SCSI cable (optional)
Network condition connector module (optional)
ASUS P2B-L/P2B-S/P2B-LS User’s Manual
7
II. FEATURES
Features
The ASUS P2B-L/P2B-S/P2B-LS motherboards are carefully designed for the de-
manding PC user who wants many advanced features processed by the fastest CPU.
•
•
Multi-Speed: Supports Intel Pentium® II processors from 233MHz to 450MHz.
IntelAGPset: Features Intel’s 440BXAGPset 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
(Flash EEPROM), offering enhancedACPI for Windows 98 compatibility, built-
in hardware-based virus protection, and autodetection of most devices for virtu-
ally automatic setup.
•
•
•
PC100 Memory Support: Equipped with four DIMM sockets to support Intel
PC100-compliant SDRAMs (8, 16, 32, 64, 128, or 256MB) up to 1024MB.
Network Interface: Features the Intel 82558 Ethernet LAN Controller (fully
integrated 10BASE-T/100BASE-TX) as an option and a LAN Activity LED
connector (optional/reserved) for monitoring network conditions.
•
Adaptec SCSI Chipset: Features Adaptec AIC-7890 Ultra2 SCSI chipset (op-
tional) that supports a combination of 8-bit and 16-bit Ultra2, Ultra, and single-
ended or standard SCSI devices and 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-volt-
age differential (LVD) technology.
•
AGPSlot: SupportsAccelerated Graphics Port cards for high performance, com-
ponent level interconnect targeted at 3D graphical display applications.
PCI/ISA Expansion Slots: Provides four 32-bit PCI and two 16-bit ISA slots.
Intelligence: Supports Keyboard Power Up, Fan Status Monitoring and Alarm,
Temperature Monitoring and Alert, Voltage Monitoring and Alert, System Re-
sources Alert, and Virus Write Protection through the onboard Hardware Moni-
tor, 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.
Ultra DMA/33 Bus Master IDE/Floppy: Comes with an onboard PCI Bus
Master IDE 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: 1.2MB)
and LS-120 floppy disk drives (3.5-inch disk drive: 120 MB, 1.44MB, 720KB).
BIOS supports IDE CD-ROM or SCSI device boot-up.
•
•
•
•
•
Concurrent PCI: Allows multiple PCI transfers from PCI master buses to
memory to CPU.
8
ASUS P2B-L/P2B-S/P2B-LS User’s Manual
II. FEATURES
•
•
Wake-On-LAN Connector: Supports Wake-On–LAN activity with the optional
network interface.
SB-Link™: Features Creative’s SB-Link™, allowing SB16 compatibility, us-
ing Intel’s PC-PCI technology, to AWE64D or compatible PCI audio cards.
IrDA: Supports an optional infrared port module for wireless interface.
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.)
•
•
ASUS P2B-L/P2B-S/P2B-LS Motherboard
Fast-SCSI Connector
Ultra-Wide SCSI Connector
Ultra2 SCSI Connector
Intel 440BX AGPset
4 DIMM Sockets
SEC CPU Slot
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)
Adaptec AIC-7890
Ultra2 & Ultra-Fast/
Wide SCSI Chipset
(optional)
Accelerated
Graphics Port
4PCI Slots
Multi-I/O
Hardware
Monitor
2 ISA Slots
Intel PIIX4E Programmable
PCIset
2Mbit Flash ROM
ASUS P2B-L/P2B-S/P2B-LS User’s Manual
9
III. INSTALLATION
ASUS P2B-L/P2B-S/P2B-LS Motherboard Layout
Power Supply Fan
TRCPU
CPU_FAN
Mouse (top port)
Keyboard (bottom port)
PS/2
USB 1 (top port)
USB 2 (bottom port)
USB
KBPWR
COM 1
BUS Freq.
Intel
440BX
AGPset
COM 2
RJ-45
LAN Activity
LED Connector
Intel 82558
Ethernet LAN
Controller
Adaptec
SCSI
Chipset
Accelerated Graphics Port
SCSI_EN
Adaptec
AIC-3860
Chipset
LAN_EN
PCI Slot 4
SBLINK
SECONDARY IDE
R
1
1
PCI Slot 3
PCI Slot 2
PRIMARY IDE
Multi-I/O
Intel
PIIX4E
Chipset
CLRTC
Freq. Ratio
BIOS Power
(CR2032 3V
Lithium Cell)
ASUS
A97127F
Chipset
PCI Slot 1
ISA Slot 1
Hardware
Monitor
SCSILED
CHASSIS
IDELED
Combine
PANEL
WOL_CON
IR
EXTBATT
2Mbit Flash EEPROM
(Programmable BIOS)
Speaker
CHA_FAN
ISA Slot 2
NOTE: Greyed components are optional at the time of purchase.
10
ASUS P2B-L/P2B-S/P2B-LS User’s Manual
III. INSTALLATION
Jumpers
1) CLRTC
2) KBPWR
3) LAN_EN
4) SCSI_EN
5) COMBINE
6) FS0, FS1, FS2
p. 13 Clear Real Time Clock (RTC) RAM
p. 13 Keyboard Power Up (Enable/Disable)
p. 14 Onboard LAN Setting (Enable/Disable)
p. 14 Onboard SCSI Setting (Enable/Disable)
p. 14 IDE+SCSI LEDActivity Light (Separated/Combined)
p. 15 CPU Bus Frequency
7) BF0, BF1, BF2, BF3
p. 15 CPU Core:Bus Frequency Multiple
Expansion Slots/Sockets
1) DIMM Sockets
2) SEC CPU Slot
3) SLOT1, SLOT2
4) PCI1, PCI2, PCI3, PCI4
5) AGP
p. 18 DIMM Memory Support
p. 19 Single Edge Contact CPU Support
p. 24 16-bit ISA Bus Expansion Slots*
p. 25 32-bit PCI Bus Expansion Slots†
p. 25 Accelerated Graphics Port
Hardware Monitor
1) TRCPU
p. 22 CPU heat Sensor Connector
Connectors
1) PS2KBMS
2) PS2KBMS
3) PRINTER
4) COM1/COM2
5) RJ-45
p. 26 PS/2 Keyboard Connector (6-pin female)
p. 26 PS/2 Mouse Connector (6-pin female)
p. 27 Parallel (Printer) Port Connector (25-pin female)
p. 27 Serial Port COM1/COM2 (two 9-pin male)
p. 27 RJ-45 Connector (8-pin female)
6) USB
7) A
p. 28 Universal Serial BUS Ports 1 & 2 (two 4 pin female)
p. 28 LAN Condition Connector (6 pins)
8) FLOPPY
p. 28 Floppy Drive Connector (34-1 pins)
9) Primary/Secondary IDE
p. 29 Primary/Secondary IDE Connector (40 pins)
10) IDELED/SCSILED
p. 29 IDE/SCSI LED Activity Light (two 2 pins)
11) SCSI-50/SCSI-68/ULTRA2-68 p. 30 Ultra-Fast (50)/Wide (68)/Ultra2 (68) SCSI Connectors
12) IR
13) SBLINK
p. 31 Infrared Port Module Connector (5 pins)
p. 31 SB-LINK™ Connector (6-1 pins)
p. 32 Message LED Lead (2 pins)
p. 32 SMI Suspend Switch Lead (2 pins)
p. 32 ATX Power Switch / Soft Power Switch (2 pins)
p. 32 Reset Switch Lead (2 pins)
p. 32 System Power LED (3 pins)
p. 32 Keyboard Lock Switch Lead (2 pins)
p. 32 Speaker Connector (4 pins)
14) TB LED (PANEL)
15) SMI (PANEL)
16) PWR (PANEL)
17) RESET (PANEL)
18) KEYLOCK (PANEL
19) KEYLOCK (PANEL
)
)
20) SPEAKER (PANEL)
21) CHASSIS
22) CHA_/CPU_/PWR_FAN
23) ATXPWR
p. 33 Chassis Open Alarm Lead (4-1 pins)
p. 33 Chassis/CPU/Power Supply Fan Connectors (3 pins)
p. 34 ATX Motherboard Power Connector (20 pins)
*The onboard hardware monitor uses the address 290H-297H so legacy ISA cards must not use this
address, otherwise conflicts will occur.
ASUS P2B-L/P2B-S/P2B-LS User’s Manual
11
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
for Open (Off). For
with two pins will be shown as
for Short (On) and
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. Set-
tings 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.
WARNING! 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.
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-L/P2B-S/P2B-LS 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.
Short the solder points to clear CMOS
CLRTC
P2B-L/S/LS Real Time Clock RAM (CLRTC)
2. Keyboard Power Up (KBPWR)
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 300mAon the +5VSB lead and the newACPI BIOS support. The default is
set to Disable because not all computers have the appropriate ATX power sup-
ply. Your computer will not function if you set this to Enable and if you do not
have the right ATX power supply.
KBPWR
1 2 3
KBPWR
1 2 3
Disable
(Default)
Enable
P2B-L/S/LS Keyboard Power (Wake) Up
ASUS P2B-L/P2B-S/P2B-LS User’s Manual
13
III. INSTALLATION
3. Onboard LAN Setting (LAN_EN)
The onboard Intel 10/100 Fast Ethernet may be enabled or disabled using this
jumper.
LAN_EN
LAN_EN
1
2
3
1
2
3
Disable
Enable
(Default)
P2B-L/S/LS Onboard LAN Setting
4. Onboard SCSI Setting (SCSI_EN)
The onboard Adaptec Fast/Wide/Ultra2 SCSI may be enabled or disabled using
this jumper.
SCSI_EN
SCSI_EN
1
2
3
1
2
3
Disable
Enable
(Default)
P2B-L/S/LS Onboard SCSI Setting
5. IDE/SCSI Device Activity LED Selection (COMBINE)
The IDE and SCSI Activity LEDs normally has separate connections. If you
have both SCSI and IDE devices connected to this motherboard but only have
one LED on your system cabinet, place a jumper on COMBINE in order to
combine the IDE and SCSI activity into the IDELED.
COMBINE (Default)
IDELED and SCSILED activity are separate
COMBINE
IDELED includes SCSILED activity
P2B-L/S/LS IDE/SCSI Device Activity LED Selection
14
ASUS P2B-L/P2B-S/P2B-LS User’s Manual
III. INSTALLATION
6. CPU Bus Frequency (FS0, FS1, FS2)
This option tells the clock generator what frequency to send to the CPU, DRAM, and
chipset.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 frequency (the ad-
vertised CPU speed).
7. 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.
1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3
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) 5.5x (11/2) 6.0x (6/1)
CPU Core:Bus Frequency Multiple
1 2 3
1 2 3
1 2 3
1 2 3
1 2 3
1 2 3
1 2 3
FS2
FS1
FS0
50MHz 66.8MHz 75MHz 83.3MHz 100MHz 103MHz 112MHz
CPU Bus Frequency
P2B-L/S/LS CPU Settings
WARNING! Frequencies above 100Mhz 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:
(BUS Freq.)
(Freq. Ratio)
CPU Model
Freq.
Ratio
BUS F.
100MHz
100MHz
100MHz
66MHz
66MHz
66MHz
66MHz
FS2 FS1 FS0
[1-2] [1-2] [1-2]
[1-2] [1-2] [1-2]
[1-2] [1-2] [1-2]
[2-3] [1-2] [1-2]
[2-3] [1-2] [1-2]
[2-3] [1-2] [1-2]
[2-3] [1-2] [1-2]
BF3 BF2 BF1 BF0
[2-3] [1-2] [2-3] [1-2]
[2-3] [1-2] [2-3] [2-3]
[2-3] [2-3] [1-2] [1-2]
[2-3] [1-2] [1-2] [2-3]
[2-3] [1-2] [2-3] [1-2]
[2-3] [1-2] [2-3] [2-3]
[2-3] [2-3] [1-2] [1-2]
Intel Pentium II 450MHz 4.5x
Intel Pentium II 400MHz 4.0x
Intel Pentium II 350MHz 3.5x
Intel Pentium II 333MHz 5.0x
Intel Pentium II 300MHz 4.5x
Intel Pentium II 266MHz 4.0x
Intel Pentium II 233MHz 3.5x
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.
ASUS P2B-L/P2B-S/P2B-LS User’s Manual
15
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16
ASUS P2B-L/P2B-S/P2B-LS User’s Manual
III. INSTALLATION
2. System Memory (DIMM)
This motherboard uses only Dual Inline Memory Modules (DIMMs). Sockets are
available for 3.3Volt (power level) unbuffered Synchronous Dynamic Random Ac-
cess Memory (SDRAM). 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: SDRAMs used must be compatible with the current Intel PC100
SDRAM specification.
Install memory in any combination as follows:
DIMM Location
168-pin DIMM
Total Memory
Socket 1 (Rows 0&1)
Socket 2 (Rows 2&3)
Socket 3 (Rows 4&5)
Socket 4 (Rows 6&7)
SDRAM 8, 16, 32, 64, 128, 256MB
SDRAM 8, 16, 32, 64, 128, 256MB
SDRAM 8, 16, 32, 64, 128, 256MB
SDRAM 8, 16, 32, 64, 128, 256MB
x1
x1
x1
x1
Total System Memory (Max 1024MB) =
ASUS Memory Module Example:
SDRAM DIMM (8 chips, Non-ECC)
General DIMM Notes
•
Use only PC100-compliant DIMMs. This motherboard operates at 100MHz,
thus most systems will not even boot if non-compliant modules are used be-
cause of the strict timing issues involved under this speed.
•
•
Two possible memory chips are supported: SDRAM with and without ECC.
SDRAM chips are generally thinner with higher pin density than traditional
EDO (Extended Data Output) chips.
•
•
•
BIOS shows SDRAM memory on bootup screen.
8 chips/side modules do not support ECC, only 9 chips/side modules support ECC.
Single-sided DIMMs come in 16, 32, 64,128MB and double-sided DIMMs come
in 32, 64, 128, 256MB sizes.
ASUS P2B-L/P2B-S/P2B-LS User’s Manual
17
III. INSTALLATION
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
Lock
(FRONT)
P2B-L/S/LS 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)
Voltage Key Position
Reserved
DRAM Key Position
RFU
Unbuffered
Buffered
5.0V
3.3V
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.
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III. INSTALLATION
3. Central Processing Unit (CPU)
This motherboard provides a Single Edge Contact (SEC) slot for a Pentium II pro-
cessor packaged in an SEC cartridge.
Pentium II Processor
WARNING! Be sure that sufficient air circulation is available across the
processor’s passive heatsink. Without sufficient circulation, the processor could
overheat and damage both the processor and the motherboard. You may install
an auxiliary fan, if necessary.
You should check to see that you have the following 9 items.
NOTE: The pictures in the following pages will have the same item numbers next to
them for your reference. The design and color of your items may be slightly different.
Lock Holes
Captive Nut
(1)
(3)
(2)
Attach Mount Bridges (Items 1,2)
Pentium II Retention Mechanism (Item 3)
(8)
Top Bar (4)
(5)
Pin
Posts
(6)
Base (7)
Larger Fin should
be on the bottom.
Heatsink bottom Groove
for the Support Top Bar
Heatsink Support Base/Top Bar (Items 4-7)
Pentium II Processor Heatsink (Item 8)
CPU (Item 9)
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III. INSTALLATION
Attach Mount Bridges
Four screws should be showing next to each corner of the SEC CPU Slot with the
two attach mount bridges installed.
SEC CPU slot
NOTE: Encircled items are the screws
from the mount bridges (1 & 2)
Attach Mount Bridges (underside)
Installing the Pentium II Processor
1. Mount the Pentium II Retention Mechanism: The retention mechanism is
designed to fit into the SEC slot only one way.
TIP: Orient the mechanism’s lock holes toward the motherboard’s chipset (see moth-
erboard layout for the location of the AGPset).
Be sure to align the notch in the mechanism with the small rib on one side of the
slot and that the mechanism is properly seated on the board. Then, screw the
captive nuts in place.
WARNING! Do not overtighten the captive nuts. Doing so could damage your
motherboard. Tighten captive nuts to no more than 6±1 inch/pound.
Lock holes
Captive nut
Captive nut
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III. INSTALLATION
2. Mount the Heatsink: Place the SEC cartridge face down on a flat surface and lay
the heat sink flush on the back (metal side) of the SEC cartridge. Check the orien-
tation of the heatsink against the pictures. The thicker fin must be orientated
toward the bottom. The top clamp is wider than the bottom clamp so only this
orientation will fit. With a screw driver, push the clamps one at a time into the
SEC cartridge. Be sure that the heatsink is firmly pressed against the SEC car-
tridge. When correctly installed, no light must be showing through between the
thermal pad of the heatsink and the SEC cartridge.
WARNING! If the heatsink is not mounted tightly against the SEC cartridge,
the CPU will overheat. You may install an auxiliary fan to provide adequate
circulation across the processor’s passive heatsink.
(9)
Push each end of the clamps until they lock
(8)
(8)
Push Clamp
Push Clamp
(9)
The thermal pad & SEC cartridge should not have a gap!
SEC Cartridge with Heatsink (Side View)
SEC Cartridge with Heatsink (Top View)
3. Insert the SEC Cartridge: Push the SEC cartridge’s two locks inward (the
preceding picture shows the locks in the outward position and inward in the
picture below). With the heatsink facing the motherboard’s chipsets, press the
cartridge gently but firmly until it is full inserted.
Push lock inward
(3)
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III. INSTALLATION
4. Secure the SEC Cartridge: Secure the SEC cartridge in place by pushing the
SEC cartridge locks outward so that the lock shows through the retention
mechanism’s lock holes.
(3)
(3)
5. Secure the Heatsink: Install the heatsink support base into the motherboard.
This is not, however, necessary if you use a heatsink with fan (see next page).
The support base is necessary to secure the heatsink (without fan). Secure the
heatsink by sliding the heatsink support top bar into the bottom groove of the
heatsink until it locks into the heatsink support base posts.
(9)
(8)
Heatsink support
top bar (4)
Heatsink support
Heatsink support
base post
base (7)
6. Connect the Heat Sensor Cable to TRCPU (optional): If you purchased the
specially designed fan and thermal monitor heatsink, you can connect the heat
sensor cable to the motherboard’s CPU heat sensor connector (TRCPU).
TRCPU
P2B-L/S/LS CPU Thermal Sensor
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III. INSTALLATION
The heatsinks shown in this manual are for reference purposes only. The recom-
mended heatsinks for the Pentium II processor are those with three-pin fans that can
be connected to the CPU fan connector on motherboard. These heatsinks have the
added benefits of proper heat dissipation and with the hardware monitor, the ability
to monitor the fan’s RPM and use the alert function through the included LANDesk
Client Manager (LDCM) software.
AAVID Heatsink
The procedures for installing the AAVID heatsink with fan is similar as that for the
heatsink without a fan. You will not, however, be able to use the heatsink support top
bar because of the fan. The heatsink support top bar will, however, still be included
in the package, in case you use a heatsink without a fan.
Elan Vital Heatsink
The procedures for installing the Elan Vital heatsink with fan is also similar to the steps
for installing the heatsink without a fan. The Elan Vital heatsink, however, comes with
a lever to clamp the heatsink into the SEC cartridge. Mount the heatsink in the orienta-
tion as shown then flip the lever from “Unlock” to “Lock.” You will not be able to also
use the heatsink support top bar because of the fan. The heatsink support top bar will,
however, still be included in the package, in case you use a heatsink without a fan.
ASUS P2B-L/P2B-S/P2B-LS User’s Manual
23
III. INSTALLATION
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
hardware or software settings for your expansion card, such as jumpers.
2. Remove your computer system’s cover and the bracket plate on the slot you
intend to use. Keep the bracket for possible future use.
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.
6. Set up the BIOS if necessary
(such as IRQ xx Used By ISA: Yes in PNP AND PCI SETUP)
7. Install the necessary software drivers for your expansion card.
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 avail-
able to cards installed in the ISA expansion bus first, then any remaining IRQs are
available to PCI cards. Currently, there are two types of ISAcards. The original ISA
expansion card design, now referred to as legacy ISA cards, requires that you con-
figure 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 Win-
dows directory to see a map of your used and free IRQs. If you use Windows 95, the
Resources tab under Device Manager displays the resource settings being used by
a particular device (to gain access, double-click the System icon under the Control
Panel program). Ensure that no two devices share the same IRQs or your computer
will experience problems when those two devices are in use at the same time.
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III. INSTALLATION
To simplify this process, this motherboard complies with the Plug and Play (PnP)
specification, which was developed to allow automatic system configuration when-
ever 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 mother-
board use an INTA #, set the jumpers on your PCI cards to INT A.
Assigning DMA Channels for ISA Cards
Some ISAcards, 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 PNPAND 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.
P2B-L/S/LS Accelerated Graphics Port (AGP)
ASUS P2B-L/P2B-S/P2B-LS User’s Manual
25
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 a PS/2 plug (mini DIN). This
connector will not allow standard AT size (large DIN) keyboard plugs. You
may use a DIN to mini DIN adapter on standard AT keyboards.
P2B-L/S/LS PS/2 Keyboard (6-pin Female)
2. PS/2 Mouse Connector (6-pin Female)
The system will direct IRQ12 to the PS/2 mouse if one is detected. If not de-
tected, expansion cards can use IRQ12. See “PS/2 Mouse Function Control” in
BIOS Features Setup of the BIOS SOFTWARE.
P2B-L/S/LS PS/2 Mouse (6-pin Female)
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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 print-
ers must be connected to the serial port.
P2B-L/S/LS Parallel 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
P2B-L/S/LS Serial Ports (9-pin Male)
5. RJ-45 Connector (8-pin Female)
This connector can be used to connect the onboard 32-bit 10/100 Mbps Ethernet
LAN Controller (optional) to a host or a hub.
P2B-L/S/LS RJ-45 Port
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III. INSTALLATION
6. Universal Serial BUS Ports 1 & 2 (Two 4-pin Female)
Two USB ports are available for connecting USB devices.
USB 1
USB 2
P2B-L/S/LS Universal Serial Bus (USB)
7. LAN Condition Connector (6-pin A) (optional/reserved)
This connector supports the optional network condition connector module. This
module mounts to system cases that support this feature.
Link LED Connector
Activity LED Connector
Speed LED Connector
P2B-L/S/LS Network Condition LED Connectors
8. Floppy Disk Drive Connector (34-1pin FLOPPY)
This connector supports the provided floppy disk drive ribbon cable. After con-
necting 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.)
NOTE: Orient the red stripe to Pin 1
Floppy Drive Connector
Pin 1
P2B-L/S/LS Floppy Disk Drive Connector
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III. INSTALLATION
9. Primary / Secondary IDE connectors (Two 40-1pin IDE)
These connectors support the provided IDE hard disk ribbon cable. After con-
necting 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 docu-
mentation 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 an-
other on a SCSI drive and select the boot disk through BIOS Features Setup.
PIN 1
P2B-L/S/LS IDE Connectors
10. IDE/SCSI Device Activity LED (two 2-pins)
This connector supplies power to the cabinet’s hard disk or IDE/SCSI activity
LED. Read and write activity by devices connected to the Primary or Secondary
IDE connectors will cause the IDELED to blink. Read and write activity by
devices connected to the SCSI connectors will cause the SCSILED to blink. If
the COMBINE jumper is used, read and write activity by devices connected to
both the IDE and SCSI connectors will cause the IDELED to blink.
TIP: If the case-mounted LED does not light,
try reversing the 2-pin plug.
IDELED
SCSILED
P2B-L/S/LS IDE/SCSI Device Activity LED
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29
III. INSTALLATION
11. Fast (50-pin)/Wide (68-pin)/Ultra2 (68-pin) SCSI Connectors
This motherboard has onboard 50-Pin Fast SCSI connector for 8-bit SCSI de-
vices, 68-Pin Wide SCSI connector for 16-bit SCSI devices, and 68-Pin Ultra2
SCSI connector for 32-bit SCSI devices.
35
1
68
34
68-pin Ultra2 SCSI Connector
68-pin Wide SCSI Connector
35
1
68
34
1
50-pin Fast SCSI II Connector
P2B-L/S/LS Onboard SCSI Connectors
IMPORTANT: The 68-pin Wide SCSI Connector is always terminated and will
only work as an end device.
NOTE: Up to 15 devices can be connected with 50-Pin Fast-SCSI and 68-Pin Ultra-
Wide SCSI combined.
The onboard Adaptec AIC-7890AB chipset (optional) incorporates an advanced multimode
I/O cell that supports both single-ended (SE) and Ultra2 devices. With Ultra2 devices, the
SCSI bus platform performs at full Ultra2 speeds (up to 40 MB/sec in 8-bit mode and up to 80
MB/sec in 16-bit mode) and extended cabling 12m (or 25m in a point-to-point configuration).
When an SE device is attached, the bus defaults to an SE speed and cable length.
In mixed environments of Ultra2 and SE devices, the onboard host adapter can be coupled with the
Adaptec AIC-3860 transceiver chipset (optional) to bridge the compatibility gap. By dividing the
SCSI bus into independent SE and low voltage differential (LVD) segments, the transceiver chipset
supports legacy devices without limiting performance and cable length on the LVD segment.
Ultra2 Devices
Disk 1
Disk 2
Disk 3
PCI Bus
Single-Ended Devices
PCI-to-Ultra2 (LVD)
LVD Mode
CD-ROM Scanner
Tape
Adaptec AIC-7890AB Chipset
Ultra2 SCSI Connector
L
S
Wide SCSI Connector
SE Mode
Adaptec AIC-3860 Chipset
P2B-L/S/LS Mixed Ultra2 and Single-Ended Device Configuration
Ultra2 SCSI uses the same connectors and cables as UltraSCSI, so upgrading is easy and cost-effective.
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III. INSTALLATION
12. IrDA-Compliant infrared module connector (5-pin IR)
This connector supports the optional wireless transmitting and receiving infrared
module. This module mounts to a small opening on system cases that support this
feature. You must also configure the setting through “UART2 Use Infrared” in
Chipset Features Setup to select whether UART2 is directed for use with COM2
or IrDA. Use the five pins as shown on the Back View and connect a ribbon cable
from the module to the motherboard according to the pin definitions.
Back View
Front View
+5V
(NC)
GND
IRRX
IRTX
+5V
(NC)
IRTX
GND
IRRX
For the infrared feature to be available,
you must connect the optional Infrared
(IrDA) module to the motherboard
P2B-L/S/LS Infrared Module Connector
13. SB-LINK™ Connector (6-1 pin SBLINK)
Using Intel’s PC-PCI technology, this connector allows Sound Blaster 16 com-
patibility toAWE64D (Digital) or compatible PCI audio cards, enabling users to
play Real-mode DOS games and multimedia applications.
SBLINK
2 1
PC/PCI Grant Sideband Signal
PC/PCI Request Sideband Signal
DGND
DGND
Serial IRQ
6 5
NOTE: Pin 3 is removed to ensure the correct orientation
of the cable on it.
P2B-L/S/LS SB-LINK™ Connector
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31
III. INSTALLATION
14. Message LED Lead (TB LED)
This indicates whether a message has been received from a fax/modem. The LED
will remain lit when there is no signal and blink when there is data being trans-
ferred or waiting in the inbox. This function requiresACPI OS and driver support.
15. SMI Suspend Switch Lead (SMI)
This allows the user to manually place the system into a suspend mode or “Green”
mode where system activity will be decreased to save electricity and expand the
life of certain components when the system is not in use. This 2-pin connector
(see figure below) connects to the case-mounted suspend switch. If you do not
have a switch for the connector, you may use the “Turbo Switch”. SMI is acti-
vated when it detects a short to open moment and therefore leaving it shorted
will not cause any problems. This may require one or two presses depending on
the position of the switch.
16. ATX Power Switch / Soft Power Switch (PWR)
The system power is controlled by a momentary switch connected to this lead.
Pressing the button once will switch the system between ON and SLEEP. Press-
ing the switch while in the ON mode for more than 4 seconds will turn the
system off. The system power LED shows the status of the system’s power.
17. Reset Switch Lead (RESET)
This 2-pin connector connects to the case-mounted reset switch for rebooting
your computer without having to turn off your power switch. This is a preferred
method of rebooting to prolong the life of the system’s power supply.
18. System Power LED (KEYLOCK)
This 3-pin connector connects the system power LED, which lights when the
system is powered on and blinks when it is in sleep mode.
19. Keyboard Lock Switch Lead (KEYLOCK)
This 2-pin connector connects to the case-mounted key switch to allow key-
board locking.
20. Speaker Connector (SPEAKER)
This 4-pin connector connects to the case-mounted speaker.
Keyboard Lock
Speaker
Power LED
Connector
Reset SW
Turbo LED
ATX Power Switch*
SMI Lead
*
Requires an ATX power supply.
P2B-L/S/LS Panel Connectors
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III. INSTALLATION
21. Chassis Open Alarm Lead (4-1 pin CHASSIS)
This lead can be used as an open chassis monitor. A high level signal to the
CHASSIS lead will indicate to the system that the chassis has been opened. This
function is available with the hardware monitor installed.
CHASSIS
+5VSB
CHASSIS
GND
P2B-L/S/LS Chassis Open Alarm Lead
22. 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 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 fan’s plug to the board taking into consideration
the polarity of the this connector.
NOTE: The “Rotation” signal is to be used only with a specially designed fan
with rotation signal.
WARNING! The CPU and/or motherboard will overheat if there is no airflow
across the CPU and onboard heatsinks. Damage may occur to the motherboard
and/or the CPU fan if these pins are incorrectly used. These are not jumpers,
do not place jumper caps over these pins.
Power Supply Fan Power
CPU Fan Power
Chassis Fan Power
Rotation
+12V
Ground
P2B-L/S/LS 12Volt Cooling Fan Power
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33
III. INSTALLATION
23. ATX Power Supply Connector (20-pin ATXPWR)
This connector connects to a ATX power supply. The plug from the power sup-
ply 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.
P2B-L/S/LS ATX Power Connector
IMPORTANT: Make sure that yourATX power supply can supply at least 10mA
on the 5-volt standby lead (5VSB). For motherboards with the onboard LAN
chipset, your ATX power supply must supply at least 720mA to the +5Volt
standby power. You may experience difficulty in powering on your system if
your power supply cannot support the load.
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III. INSTALLATION
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 user’s 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. ForATX power
supplies, the system LED will light when theATX power switch is pressed. The
monitor LED may light up after the system’s if it complies with “green” stan-
dards 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 set-
tings and connections or call your retailer for assistance.
7. During power-on, hold down <Delete> to enter BIOS setup. Follow the instruc-
tions in the next section, BIOS SOFTWARE.
* Powering Off your computer: You must first exit or shut down your operating
system before switching off the power switch. For ATX power supplies, you
can press the ATX power switch after exiting or shutting down your operating
system. If you use Windows 95, click the Start button, click Shut Down, and
then click Shut down the computer?. The system will give three quick beeps
after about 30 seconds and then power off after Windows shuts down.
NOTE: The message “You can now safely turn off your computer” will not
appear when shutting down with ATX power supplies.
ASUS P2B-L/P2B-S/P2B-LS User’s Manual
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.
IMPORTANT! If “unknown” is displayed after Flash Memory:, the memory
chip is either not programmable or is not supported by the ACPI BIOS and
therefore, cannot be programmed by the Flash Memory Writer utility.
Main Menu
1. Save Current BIOS To File
This option allows you to save a copy of the original motherboard BIOS in case you
need to reinstall it. It is recommended that you save AFLASH.EXE and the BIOS
file to a bootable floppy disk.
To save your current BIOS,
type [1] at the Main Menu and
then press <Enter>. The Save
Current BIOS To File screen
appears. Type a filename and
the path, for example,
A:\XXXXX-X and then press
<Enter>.
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IV. BIOS SOFTWARE
2. Update BIOS Including Boot Block and ESCD
This option updates the boot block, the baseboard BIOS, and the ACPI extended
system configuration data (ESCD) parameter block from a new BIOS file. See the
next page for procedures on downloading an updated BIOS file.
To update your current BIOS,
type [2] at the Main Menu
and then press <Enter>. The
Update BIOS Including
Boot Block and ESCD
screen appears. Type the
filename of your new BIOS
and the path, for example,
A:\XXXXX.AWD, and then
press <Enter>.
When prompted to confirm
the BIOS update, press Y to
start the update.
The utility starts to program
the new BIOS information
into the flash ROM. When
the programming is finished,
Flashed Successfully will be
displayed.
Follow the onscreen instruc-
tions to continue.
ASUS P2B-L/P2B-S/P2B-LS User’s Manual
37
IV. BIOS SOFTWARE
Managing and Updating Your Motherboard’s BIOS
Upon First Use of the Computer System
1. Create a bootable system floppy disk by typing [FORMAT A:/S] from the DOS
prompt without creating “AUTOEXEC.BAT” and “CONFIG.SYS” files.
2. Copy AFLASH.EXE to the just created boot disk.
3. RunAFLASH.EXE from this new disk and select option 1. Save Current BIOS
to File. See 1. Save Current BIOS To File on the previous page for more de-
tails and the rest of the steps.
Updating BIOS Procedures (only when necessary)
1. Download an updated ASUS BIOS file from the Internet (WWW or FTP) or a
BBS (Bulletin Board Service) (seeASUS CONTACT INFORMATION on page
3 for details) and save to the disk you created earlier.
2. Boot from the disk you created earlier.
3. At the “A:\” prompt, type AFLASH and then press <Enter>.
4. At the Main Menu, type 2 and then press <Enter>. See 2. Update BIOS In-
cluding Boot Block and ESCD on the previous page for more details and the
rest of the steps.
WARNING! If you encounter problems while updating the new BIOS, DO NOT
turn off your system since this might prevent your system from booting up. Just
repeat the process, and if the problem still persists, update the original BIOS file
you saved to disk above. If the Flash Memory Writer utility was not able to
successfully update a complete BIOS file, your system may not be able to boot
up. If this happens, your system will need service.
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6. BIOS Setup
The motherboard supports two programmable Flash ROM chips: 5-Volt and 12-
Volt. Either of these memory chips can be updated when BIOS upgrades are re-
leased. Use the Flash Memory Writer utility to download the new BIOS file into the
ROM chip as described in detail in this section.
All computer motherboards provide a Setup utility program for specifying the sys-
tem configuration and settings. If your motherboard came in a computer system, the
proper configuration entries may have already been made. If so, invoke the Setup
utility, as described later, and take note of the configuration settings for future refer-
ence; in particular, the hard disk specifications.
If you are installing the motherboard, reconfiguring your system or you receive a
Run Setup message, you will need to enter new setup information. This section
describes how to configure your system using this utility.
The BIOS ROM of the system stores the Setup utility. When you turn on the com-
puter, the system provides you with the opportunity to run this program. This ap-
pears during the Power-On Self Test (POST). Press <Delete> to call up the Setup
utility. If you are a little bit late pressing the mentioned key(s), POST will continue
with its test routines, thus preventing you from calling up Setup. If you still need to
call Setup, reset the system by pressing <Ctrl> + <Alt> + <Delete>, or by pressing
the Reset button on the system case. You can also restart by turning the system off
and then back on again. But do so only if the first two methods fail.
When you invoke Setup, the CMOS SETUP UTILITY main program screen will
appear with the following options:
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Load Defaults
The “Load BIOS Defaults” option loads the minimum settings for troubleshooting.
“Load Setup Defaults”, on the other hand, is for loading optimized defaults for
regular use. Choosing defaults at this level, will modify all applicable settings.
A section at the bottom of the above screen displays the control keys for this screen.
Take note of these keys and their respective uses. Another section just below the
control keys section displays information on the currently highlighted item in the list.
Standard CMOS Setup
The “Standard CMOS Setup” option allows you to record some basic system hard-
ware configuration and set the system clock and error handling. If the motherboard
is already installed in a working system, you will not need to select this option
anymore. However, if the configuration stored in the CMOS memory on the board
gets lost or damaged, or if you change your system hardware configuration, you will
need to respecify the configuration values. The configuration values usually get lost
or corrupted when the power of the onboard CMOS battery weakens.
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)
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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 anAUTOEXEC.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 chan-
nel 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 bythe BIOS. If you install other SCSI
controller cards, refer to their respective documentations on how to install the re-
quired SCSI drivers.
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 auto-
matically 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.
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Auto detection of hard disks on bootup
For each field: Primary Master, Primary Slave, Secondary Master, and Secondary
Slave, you can select Auto under the TYPE and MODE fields. This will enable auto
detection of your IDE hard disk during bootup. This will allow you to change your
hard disks (with the power off) and then power on without having to reconfigure
your hard disk type. If you use older hard disks that do not support this feature, then
you must configure the hard disk in the standard method as described earlier by the
“User” option.
NOTE: After the IDE hard disk drive information has been entered into BIOS, new
IDE hard disk drives must be partitioned (such as with FDISK) and then formatted
before data can be read from and write on. Primary IDE hard disk drives must have
its partition set to active (also possible with FDISK).
NOTE: SETUP Defaults are noted in parenthesis next to each function heading.
Drive A / Drive B (None)
These fields record the types of floppy disk drives installed in your system. The
available options for drives A and B are: 360KB, 5.25 in.; 1.2MB, 5.25 in.; 720KB,
3.5 in.; 1.44MB, 3.5 in.; 2.88MB, 3.5 in.; None
To enter the configuration value for a particular drive, highlight its corresponding
field and then select the drive type using the left- or right-arrow keys.
Floppy 3 Mode Support (Disabled)
This is the Japanese standard floppy drive. The standard stores 1.2MB in a 3.5inch
diskette. This is normally disabled but you may choose from either: Drive A, Drive
B, Both, and Disabled
Video (EGA/VGA)
Set this field to the type of video display card installed in your system. The options
are EGA/VGA, CGA 49, CGA 80, and Mono (for Hercules or MDA).
If you are using a VGA or any higher resolution card, choose EGA/VGA.
Halt On (All Errors)
This field determines which types of errors will cause the system to halt. Choose from
All Errors; No Errors; All,But Keyboard, All,But Diskette; and All,But Disk/Key.
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BIOS Features Setup
This “BIOS Features Setup” option consists of configuration entries that allow you
to improve your system performance, or let you set up some system features accord-
ing to your preference. Some entries are required by the motherboard’s design to
remain in their default settings.
Asection 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.
Details of BIOS Features Setup
CPU Internal Core Speed
This function is reserved for future use and is currently disabled.
Boot Virus Detection (Enabled)
This field allows you to set boot virus detection, ensuring a virus-free boot sector.
This new antivirus solution is unlike native BIOS tools, which offer limited virus
protection typically by write-protecting the partition table. With this new solution,
your computer is protected against boot virus threats earlier in the boot cycle, that is,
before they have a chance to load into your system. This ensures your computer
boots to a clean operating system. The system halts and displays a warning message
when it detects a virus. If this occurs, you can either allow the operation to continue
or use a virus-free bootable floppy disk to restart and investigate your system. Be-
cause of conflicts with new operating systems, for example, during installation of
new software, you may have to set this to Disabled to prevent write errors.
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CPU Level 1 Cache / CPU Level 2 Cache (Enabled)
These fields allow you to choose from the default of Enabled or choose Disabled to
turn on or off the CPU’s Level 1 and Level 2 built-in cache.
CPU Level 2 Cache ECC Check (Disabled)
This function controls the ECC check capability in the CPU level 2 cache.
BIOS Update (Enabled)
This functions as an update loader integrated into the BIOS to supply the processor
with the required data. The BIOS will load the update on all processors during
system bootup in the default position of Enabled.
Turbo Mode (Enabled)
Leave on default setting of Enabled for best performance.
Quick Power On Self Test (Enabled)
This field speeds up the Power-On Self Test (POST) routine by skipping retesting a
second, third, and forth time. Setup default setting for this field is Enabled. A
complete test of the system is done on each test.
HDD Sequence SCSI/IDE First (IDE)
When using both SCSI and IDE hard disk drives, IDE is always the boot disk using
drive letter C (default setting of IDE). This new feature allows a SCSI hard disk
drive to be the boot disk when set to SCSI. This allows multiple operating systems
to be used on both IDE and SCSI drives or the primary operating system to boot
using a SCSI hard disk drive.
Boot Sequence (A,C)
This field determines where the system looks first for an operating system. Options
are A,C; A,CDROM,C; CDROM,C,A; D,A; E,A; F,A; C only; LS/ZIP, C; and C,A. The
setup default setting, A, C, is to check first the floppy disk and then the hard disk drive.
Boot Up Floppy Seek (Disabled)
When enabled, the BIOS will seek drive A once.
Floppy Disk Access Control (R/W)
This allows protection of files from the computer system to be copied to floppy
disks by allowing the setting of Read Only to only allow reads from the floppy disk
drive but not writes. The setup default R/W allows both reads and writes.
IDE HDD Block Mode Sectors (HDD MAX)
This field enhances hard disk performance by making multi-sector transfers instead
of one sector per transfer. Most IDE drives, except older versions, can utilize this
feature. Selections are HDD MAX, Disabled, 2, 4, 8, 16, and 32.
HDD S.M.A.R.T. capability (Disabled)
This allows the enabling or disabling of the S.M.A.R.T. (Self-Monitoring, Analysis
and Reporting Technology) system which utilizes internal hard disk drive monitor-
ing technology. This feature is normally disabled because system resources used in
this feature may decrease system performance.
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PS/2 Mouse Function Control (Auto)
The default of Auto allows the system to detect a PS/2 mouse on bootup. If detected,
IRQ12 will be used for the PS/2 mouse. IRQ12 will be reserved for expansion cards
if a PS/2 mouse is not detected. Enabled will always reserve IRQ12, whether on
bootup a PS/2 mouse is detected or not.
OS/2 Onboard Memory > 64M (Disabled)
When using OS/2 operating systems with installed DRAM of greater than 64MB,
you need to set this option to Enabled otherwise leave this on Disabled.
......................................................................................................................................
PCI/VGA Palette Snoop (Disabled)
Some display cards that are nonstandard VGAsuch as graphics accelerators or MPEG
Video Cards may not show colors properly. The setting Enabled should correct this
problem. Otherwise leave this on the setup default setting of Disabled.
Video ROM BIOS Shadow (Enabled)
This field allows you to change the video BIOS location from ROM to RAM. Relo-
cating to RAM enhances system performance, as information access is faster than
the ROM.
C8000-CBFFF to DC000-DFFFF (Disabled)
These fields are used for shadowing other expansion card ROMs. If you install
other expansion cards with ROMs on them, you will need to know which addresses
the ROMs use to shadow them specifically. Shadowing a ROM reduces the memory
available between 640K and 1024K by the amount used for this purpose.
Boot Up NumLock Status (On)
This field enables users to activate the Number Lock function upon system boot.
Typematic Rate Setting (Disabled)
When enabled, you can set the two typematic controls listed next. Setup default
setting is Disabled.
Typematic Rate (Chars/Sec) (6)
This field controls the speed at which the system registers repeated keystrokes.
Options range from 6 to 30 characters per second. Setup default setting is 6; other
settings are 8, 10, 12, 15, 20, 24, and 30.
Typematic Delay (Msec) (250)
This field sets the time interval for displaying the first and second characters. Four
delay rate options are available: 250, 500, 750, and 1000.
Security Option (Setup)
When you specify a Supervisor Password and/or User Password (explained later in
this section), the Security Option field determines when the system prompts for the
password. System prompts for the User Password every time you start your system.
Setup prompts for the Supervisor Password only when entering the BIOS Setup
utility.
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