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
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without the express written permission of ASUSTeK COMPUTER INC. (“ASUS”).
ASUS PROVIDES THIS MANUAL “AS IS” WITHOUT WARRANTY OF ANY KIND,
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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
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the serial number of the product is defaced or missing.
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explanation and to the owners’ benefit, without intent to infringe.
• Intel, LANDesk, and Pentium are registered trademarks of Intel Corporation.
• Celeron is a trademark of Intel Corporation.
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•This device must accept any interference received, including interference that
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the receiver is connected.
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6
ASUS P2-99B User’s Manual
I. INTRODUCTION
How This Manual Is Organized
This manual is divided into the following sections:
I.IntroductionManual information and checklist
II.FeaturesInformation and specifications concerning this product
III.Hardware SetupInstructions on setting up the motherboard and jumpers
IV.BIOS SetupInstructions on setting up the BIOS software
V.Software SetupInstructions on setting up the included support software
VI.Software Reference Reference material for the included support software
VII. AppendixOptional items and general reference
Item Checklist
Please check that your package is complete. If you discover damaged or missing
items, please contact your retailer.
(1) ASUS Motherboard
Manual / Checklist
I. INTRODUCTION
(1) Universal Retention Mechanism for SECC2/SECC/SEPP Processors
(1) Ribbon cable for master and slave IDE drives
(1) Ribbon cable for (1) 5.25” and (2) 3.5” floppy disk drives
(1) Serial cable connector set
(1) Parallel + PS/2 mouse connector set
(1) Bag of spare jumper caps
(1) Support CD with drivers and utilities
(1) This Motherboard User’s Manual
ASUS IrDA-compliant infrared module (optional)
ASUS USB/MIR module (optional)
ASUS CIDB chassis sensor module (optional)
ASUS S370 CPU card (optional)
ASUS PCI-L101 Wake-On-LAN 10/100 Ethernet Card (optional)
ASUS P2-99B User’s Manual7
Features of the ASUS P2-99B Motherboard
The ASUS P2-99B is carefully designed for the demanding PC user who wants
advanced features processed by the fastest CPU.
Specifications:
•Multi-Speed: Supports Intel Pentium
•Intel AGPset: Features Intel’s 440ZX AGPset with I/O subsystems and front-
II. FEATURES
Specifications
•Multi-Cache: Supports processors with 512, 128, or 0KB Pipelined Burst Level
•PC100 Memory Support: Equipped with three DIMM sockets to support Intel
•Peripheral Wake Up: Supports modem wake up, keyboard wake up, and LAN
II. FEATURES
®
III (450MHz and faster), Pentium® II
(233MHz to 450MHz), and Celeron
side bus (FSB) platform, which boosts the traditional 66MHz internal bus speed
to 100MHz.
2 cache.
PC100-compliant SDRAMs up to 512MB. These new SDRAMs are necessary
to meet the critical enhanced 100MHz bus speed requirement.
card wake up functions from sleep or soft-off mode.
TM
(266MHz and faster) processors.
•Thermal Sensor Connector with Optional Sensor (only w/hardwar e monitor):
Accurately detects the CPU temperature with the ASUS Smart Fan or the Intel boxed
processor heatsink with fan when connected to an optional ASUS P2T-Cable.
•PC Health Monitoring (optional): Provides an easier way to examine and man-
age system status information such as CPU and system voltages, temperatures,
and fan status through the onboard hardware monitor ASIC and the bundled
LDCM by Intel or PC Probe from ASUS.
•AGP Slot: Supports an Accelerated Graphics Port card for high performance,
component level interconnect targeted at 3D graphical display applications using a 1X or 2X mode bus.
•SB-Link™: Features Creative’s SB-Link™, allowing SB16 compatibility, us-
ing Intel’s PC-PCI DMA and serialized IRQ protocols, to AWE64D or compatible PCI audio cards.
•SMBus: Features the System Management Bus interface, which is used to physi-
cally transport commands and information between SMBus devices.
•PCI & ISA Expansion Slots: Provides three 32-bit PCI and two 16-bit ISA
slots.
•Multi-I/O: Provides two high-speed UAR T compatible serial ports and one par-
allel port with EPP and ECP capabilities. UART2 can also be directed from
COM2 to the Infrared Module for wireless connections.
•UltraDMA/33 Bus Master IDE: Comes with an onboard PCI Bus Master IDE
controller with two connectors that support four IDE devices in two channels,
supports UltraDMA/33, PIO Modes 3 and 4 and Bus Master IDE DMA Mode 2,
and supports Enhanced IDE devices, such as Tape Backup and CD-ROM, CDR, CD-RW and LS-120 drives.
8ASUS P2-99B User’s Manual
II. FEATURES
•Universal Retention Mechanism: Supports a Pentium® III / II processor pack-
aged in a Single Edge Contact Cartridge (SECC2/SECC) or a Celeron
sor packaged in a Single Edge Processor Package (SEPP).
•Wake-On-LAN: Supports Wake-On-LAN activity through an optional ASUS
PCI-L101 10/100 Fast Ethernet PCI card (See APPENDIX) or a similar ethernet
card.
•IrDA: Supports an optional infrared port module for a wireless interface.
Special Features:
•Enhanced ACPI and Anti-Boot V irus BIOS: Features a programmable BIOS,
offering enhanced ACPI for W indows 98 compatibility, built-in firmware-based
virus protection through T rend ChipA way V irus codes, and autodetection of most
devices for virtually automatic setup.
•Desktop Management Interface (DMI): Supports DMI through BIOS, which
allows hardware to communicate within a standard protocol creating a higher
level of compatibility. (Requires DMI-enabled components.)
TM
proces-
Specifications
II. FEATURES
•Easy Installation: Incorporates BIOS that supports autodetection of hard disk
drives, PS/2 mouse, and Plug and Play devices to make the setup of hard disk
drives, expansion cards, and other devices virtually automatic.
•PC’98 Compliant: Both the BIOS and hardware levels of ASUS smart series of
motherboards meet PC’98 compliancy. The new PC’98 requirements for systems and components are based on the following high-level goals: Support for
Plug and Play compatibility and power management for configuring and managing all system components, and 32-bit device drivers and installation procedures for Windows 95/98/NT.
•Symbios SCSI BIOS: Supports optional ASUS SCSI controller cards through
•Double the IDE Transfer Speed: ASUS smart series motherboards with Intel
chipsets improves IDE transfer rate using Bus Master UltraDMA/33 IDE which
can handle data transfer up to 33MB/s. The best of all is that this new technology is compatible with existing ATA-2 IDE specs so there is no need to upgrade
current hard drives or cables.
•SDRAM Optimized Performance: Supports the new generation memory - Syn-
chronous Dynamic Random Access Memory (SDRAM) which increases the data
transfer rate to 800MB/s max using PC100-compliant SDRAM.
ASUS P2-99B User’s Manual9
Intelligent Features:
•Auto Fan Off: The system fans will power off automatically even in sleep
•Dual Function Power Button: Pushing the power button for less than 4 sec-
II. FEATURES
Specifications
•Fan Status Monitoring and Alarm (only w/optional hardwar e monitor): To
•Keyboard Power Up: Keyboard Power Up can be enabled or disabled to allow
II. FEATURES
mode. This function reduces both energy consumption andsystem noise, and is
an important feature in implementing silent PC systems.
onds when the system is in the working state places the system into one of two
states: sleep mode or soft-off mode, depending on the BIOS setting (see PowerManagement Setup under BIOS SETUP). When the power button is pressed for
more than 4 seconds, the system enters the soft-off mode regardless of the BIOS
setting.
prevent system overheat and system damage, the CPU, power supply, and system fans can be monitored for RPM and failure. All fans are set for its normal
RPM range and alarm thresholds.
the computer to be powered on using your keyboard.
•Message LED (requires ACPI OS support): Turbo LEDs now act as informa-
tion providers. Through the way a particular LED illuminates, the user can determine the stage the computer is in. A simple glimpse provides useful information to the user.
•Remote Ring On (requires external modem): This allows a computer to be
turned on remotely through an external modem. With this benefit on-hand, any
user can access vital information from their computer from anywhere in the world!
•System Resources Alert (only w/optional hardwar e monitor): Today’ s oper-
ating systems such as W indows 95/98/NT and OS/2, require much more memory
and hard drive space to present enormous user interfaces and run large applications. The system resource monitor will warn the user before the system resources are used up to prevent possible application crashes. Suggestions will
give the user information on managing their limited resources more efficiently.
•Temperature Monitoring and Alert (only w/optional hardware monitor):
To prevent system overheat and system damage, there are heat sensors to monitor the CPU (the Pentium III / II processor requires a special heatsink with a
thermal sensor) and system temperatures to warn of damaging temperatures.
•Voltage Monitoring and Alert (only w/optional hardware monitor): System
voltage levels are monitored to ensure stable voltage to critical motherboard
components. Voltage specifications are more critical for future processors, so
monitoring is necessary to ensure proper system configuration and management.
19) CHASISp. 34 Chassis Intrusion Sensor Lead (4-1 pins)
20) SBLINKp. 35 SB-LinkTM Connector (6-1 pins)
21) SMBp. 35 SMBus Connector (5-1 pins)
22) ATXPWRp. 36 ATX Power Supply Connector (20 pins)
23) PS/2p. 36 AT Power Supply Connector (20 pins)
PANEL
PANEL
)
)
p. 32 System Power LED Lead (3-1 pins)
p. 32 Keyboard Lock Switch Lead (2 pins)
III. H/W SETUP
Layout Contents
*
The optional onboard hardware monitor uses the address 290H-297H so legacy ISA cards
must not use this address otherwise conflicts will occur.
ASUS P2-99B User’s Manual13
Hardware Setup Steps
Before using your computer, you must complete the following steps:
1.Check Motherboard Settings
2.Install Memory Modules
3.Install the Central Processing Unit (CPU)
4.Install Expansion Cards
5.Connect Ribbon Cables, Panel Wires, and Power Supply
6.Setup the BIOS Software
1. Motherboard Settings
This section explains in detail how to change your motherboard’s function settings
through the use of switches and/or jumpers.
WARNING! Computer motherboards and expansion cards contain very delicate
Motherboard Settings
III. H/W SETUP
Integrated Circuit (IC) chips. To protect them against damage from static electricity, you should follow some precautions whenever you work on your computer.
III. HARDWARE SETUP
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.
Jumpers
1.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> or any key,
depending on your motherboard) to power up your computer. This feature requires an ATX power supply that can supply at least 300mA on the +5VSB lead.
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 appropriate ATX power supply.
KBPWR
Disable
(Default)
P2-99B
P2-99B Keyboard Power Up
R
14ASUS P2-99B User’s Manual
123123
Enable
III. HARDWARE SETUP
2.Voltage Input/Output Selection (VIO)
This jumper allows you to select the voltage supplied to the DRAM, chipset,
AGP, and the CPU’s I/O buffer.
1 2 3
VIO
3.50Volts
(Default)
P2-99B
R
P2-99B Voltage Input/Output Selection
3.Voltage Regulator Output Selection (VCORE)
This jumper sets the core voltage supplied to the microprocessor.
VCORE
1 2 3
1 2 3
3.66Volts
III. H/W SETUP
Motherboard Settings
1 2 3
Test
P2-99B
Normal
(Default)
R
P2-99B CPU Core Voltage Selection
WARNING! Using a higher voltage Test for VCORE or 3.66Volts for VIO may
help when overclocking but may result in the shortening of your computer
component’s life. It is strongly recommended that you leave these jumpers on
their default settings.
ASUS P2-99B User’s Manual15
III. HARDWARE SETUP
4.CPU External Frequency Selection (FS0, FS1, FS2, FS3)
This option tells the clock generator what frequency to send to the CPU, DRAM, and
440ZX AGPset. This allows the selection of the CPU’s External frequency. The CPU
External Frequency multiplied by the Frequency Multiple equals the CPU’ s Internal
frequency (the advertised CPU speed).
Motherboard Settings
III. H/W SETUP
P2-99B CPU
External Frequency Selection
5.CPU Core:External Frequency Multiple (BF0, BF1, BF2, BF3)
This option sets the frequency multiple between the Internal frequency of the
CPU and the CPU’ s External frequency . These must be set in conjunction with the
CPU External Frequency.
P2-99B
123
FS3
FS2
FS1
FS0
66.8MHz
CPU
33.4MHz
PCI
123
FS3
FS2
FS1
FS0
105.0MHz
R
CPU
PCI
FS3
FS2
FS1
FS0
CPU
PCI
35.0MHz
123
124.0MHz
31.0MHz
123
75.0MHz
37.5MHz
123
110.00MHz
36.67MHz
123
133.0MHz
33.3MHz
123
83.30MHz
41.65MHz
123
112.00MHz
37.33MHz
123
133.00MHz
44.33MHz
123
100.30MHz
33.43MHz
123
115.00MHz
38.33MHz
123
140.0MHz
35.0MHz
123
103.00MHz
34.33MHz
123
120.0MHz
40.0MHz
123
150.0MHz
37.5MHz
BF1
BF2
P2-99B
BF1
BF2
BF0
3
2
1
2.0x(2/1)
BF0
3
2
1
4.5x(9/2)
BF0
3
R
2
1
7.0x(7/1)
BF1
BF1
BF3
BF1
BF2
BF0
2.5x(75/2)3.0x(3/1)3.5x(7/2)
BF0
BF2
BF3
5.0x(5/1)
BF2
BF3
BF0
7.5x(15/2)
BF1
BF1
BF2
BF2
BF3
BF0
BF0
BF3
5.5x(11/2)
BF3
BF0
8.0x(8/1)
BF1
BF1
BF1
BF2
BF2
BF2
BF3
BF3
6.0x(6/1)
BF3
BF0
BF0
BF1
BF1
BF2
BF2
BF0
BF3
4.0x(4/1)
BF0
BF3
6.5x(13/2)
BF1
BF2
BF3
BF3
P2-99B CPU Core-to-Bus Frequency Multiple Settings
WARNING! Frequencies above 100 MHz exceed the specifications for the on-
board Intel Chipset and are not guaranteed to be stable.
16ASUS P2-99B User’s Manual
III. HARDWARE SETUP
Set the jumpers by the Internal speed of your processor as follows:
NOTES: Overclocking your processor is not recommended. It may result in a slower
speed. Voltage Regulator Output Selection (VID) is not required for Pentium III / II/
Celeron processors because they send VID signals directly to the onboard power
controller.
III. H/W SETUP
Motherboard Settings
ASUS P2-99B User’s Manual17
III. HARDWARE SETUP
2. System Memory (DIMM)
NOTE: No hardware or BIOS setup is required after adding or removing memory.
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).
The Intel 440ZX AGPset does not support ECC. However, ECC memory modules
may still be used, but the ECC function will not be available.
Memory speed setup is recommended through SDRAM Configuration under “Chipset
Features Setup” in BIOS SETUP.
Install memory in the following combinations:
Location168-pin DIMM SDRAMTotal Memory
DIMM1Single-sidedx1
(Rows 0&1)Double-sided
System Memory
III. H/W SETUP
DIMM2Single-sidedx1
(Rows 2&3)Double-sided (Socket 3 must be empty)
DIMM3Single-sided (Socket 2 must be single-sided)x1
(Row 3)(Double-sided cannot be used here!)
IMPORTANT!A total of four rows of memory is supported on this motherboard.
One side (with memory chips) of the DIMM takes up one row . Because Socket 3
shares Row 3 with Socket 2, Socket 3 can only be used if Socket 2 does not use
Row 3.
WARNING!If Row 3 is used by both Socket 2 and 3, your system will not boot up!
SPD Support
This motherboard supports SPD DIMMs, and it is recommended that SPD DIMMs
be used.
General DIMM Notes
•For the system CPU bus to operate above 100MHz, use only PC100-compli-
•ASUS motherboards support SPD (Serial Presence Detect) DIMMs. This is the
•SDRAM chips are generally thinner with higher pin density than EDO (Ex-
•BIOS shows SDRAM memory on bootup screen.
Total System Memory (Max 512MB)=
ant DIMMs. When this motherboard operates at 100MHz, most system will not
even boot if non-compliant modules are used because of the strict timing issues
involved under this speed. If your DIMMs are not PC100-compliant, set the
CPU external frequency to 66MHz for system stability.
memory of choice for best performance vs. stability.
tended Data Output) chips.
18ASUS P2-99B User’s Manual
III. HARDWARE SETUP
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.
Lock
20 Pins 60 Pins88 Pins
P2-99B
R
P2-99B 168-Pin DIMM Memory Sockets
The DIMMs must be 3.3Volt unbuffered SDRAMs. To determine the DIMM type,
check the notches on the DIMMs (see figure below).
168-Pin DIMM Notch Key Definitions (3.3V)
DRAM Key Position
RFU
Buffered
Unbuffered
Voltage Key Position
5.0V
Reserved
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 per DIMM.
III. H/W SETUP
System Memory
ASUS P2-99B User’s Manual19
(This page was intentionally left blank.)
System Memory
III. H/W SETUP
III. HARDWARE SETUP
20ASUS P2-99B User’s Manual
III. HARDWARE SETUP
3. Central Processing Unit (CPU)
NOTE: The following pictures are provided for reference purposes only. The appearance of your retention mechanism and fan may be different from the following
examples.
Your motherboard provides a Slot 1 connector for a Pentium
aged in a Single Edge Contact Cartridge (SECC2), a Pentium
®
III processor pack-
®
II processor packaged in SECC/SECC2, or a Celeron™ processor packaged in a Single Edge Processor Package (SEPP). An ASUS S370 CPU card can allow Socket 370 processors to
be used on any ASUS motherboard with the Slot 1 connector (See ASUS S370 CPUCard in APPENDIX for instructions on using this card).
Pentium II processor packaged in an SECC with
heatsink and fan (top view)
Pentium III (in an SECC2) with heatsink and fan
NOTE: The SEPP fan (for Celeron processors) is
similar to SECC2 fan except that the clamping
design is different.
Universal Retention Mechanism
Your motherboard comes preinstalled
with a Universal Retention Mechanism
(URM). The URM supports Pentium III /
II and Celeron processors.
CPU
III. H/W SETUP
Universal Retention Mechanism (URM)
Heatsinks
The recommended heatsinks (see section on recommended heatsinks for Pentium
III / II processors for more information) for the boxed Pentium III / II and Celeron
processors are those with three-pin fans that can be connected to the fan connectors
on the motherboard.
WARNING!Be sure that there is sufficient air circulation across the 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 chassis fan, if necessary.
ASUS P2-99B User’s Manual21
III. HARDWARE SETUP
Installing the Processor
1.Unlock the URM’s Folding Support Arms:
The folding support arms of the URM are
locked when shipped.
T o unlock the support arms, simply flip them
up to an upright position.
Locked Folding
Support Arms
III. H/W SETUP
CPU
The URM is now ready for the installation
Unlocked Folding
Support Arms
of your processor.
2.Attach the Heatsink
NOTE: If provided, you should follow the heatsink attachment instructions
that came with your heatsink or processor. The following steps are provided
only as a general guide and may not reflect those for your heatsink.
Using the SECC fan with the Pentium
®
II
Lock Arm
Lock Arm
Push the two lock arms one direction to clamp
the heatsink onto the processor and the other
direction to release.
Using the SECC2 fan with the Pentium
®
III
Insert the four heatsink’s pins through the
holes of the SECC2. Place the metal clip on
the ends of the pins and slide until it locks
into place.
Four Pins and metal clip
NOTE: The SEPP heatsink and fan (for Intel Celeron processors) is similar to
the SECC2 heatsink and fan except that the clamping design is different.
22ASUS P2-99B User’s Manual
III. HARDWARE SETUP
WARNING! Make sure the heatsink is mounted tightly against the SECC, SECC2
or SEPP; otherwise, the CPU will overheat. You may install an auxiliary fan to
provide adequate circulation across the processor’s passive heatsink.
3.Insert the SECC2/SECC/SEPP
SECC with Pentium
®
II only: Push the SECC’s two locks inward until you hear
a click (the picture in step 2 shows the locks in the outward position and inward in
the picture below).
With the heatsink facing the motherboard’s chipset, push the SECC2, SECC, or
SEPP gently but firmly into the Slot 1 connector until it is fully inserted.
SECC
Push lock inward
CPU fan cable to
fan connector
SECC2/SEPP
CPU fan cable to
fan connector
4.Secure the SECC2/SECC/SEPP
CPU
III. H/W SETUP
Secure the SECC2/SECC/SEPP in place by pushing the SECC2/SECC/SEPP
until it is firmly seated on the Slot 1 connector.
SECC with Pentium
®
II only: The SECC locks should be outward when se-
cured so that the lock shows through the retention mechanism’s lock holes.
SECCSECC2/SEPP
Lock hole
Lock hole
CPU fan cable to
fan connector
CPU fan
cable to fan
connector
ASUS P2-99B User’s Manual23
III. HARDWARE SETUP
ASUS Smart Thermal Solutions
(only for motherboards with hardware monitor)
ASUS provides two smart solutions to Slot 1 CPU thermal problems: the ASUS
Smart Fan or ASUS S-P2FAN and the ASUS P2T-Cable.
III. H/W SETUP
CPU
ASUS S-P2FAN
Thermal Cable
(2 black wires)
CPU Fan Cable
(3 colored wires)
The optional ASUS Smart Fan or ASUS S-P2FAN is a CPU
fan for a Pentium
®
II processor packaged in an SECC. Unlike other CPU thermal solutions, the ASUS S-P2FAN has
an integrated thermal sensor located near the center of the
CPU heat source. The sensor is optimized by ASUS to give
the most accurate reading of the CPU temperature, thus
provides the best protection to your computer system.
To Use the ASUS S-P2FAN
See 2. Attach the Heatsink on the preceding page for the relevant procedures. Note
that the S-P2FAN comes with a rock arm design for easy FAN/CPU installation.
ASUS P2T-Cable
The optional ASUS P2T-Cable can be
used for a Pentium
®
III/II processor pack-
Sensor
aged in an SECC2/SECC or a Celeron™
processor packaged in an SEPP.
Sensor Connector Plug
NOTE: The ASUS P2T-Cable can
only be used in a Slot 1 motherboard
with a 2-pin thermal sensor connector.
To Use the ASUS P2T-Cable
NOTE: The following procedures assume that you have properly attached a
heatsink onto an SECC2/SECC/SEPP.
1.Simply peel off the tab from the sensor and then stick the sensor near the middle
edge of the Intel boxed processor heatsink with fan (middle) or to either the
upper or lower edge of the Celeron™ heatsink (right), as indicated.
24ASUS P2-99B User’s Manual
III. HARDWARE SETUP
Tab
Sensor
← OR STICK ABOUT HERE
WARNING! Do not insert the sensor between the processor and heatsink, other-
wise, it will cause damage to the P2T-Cable.
IMPORTANT! ASUS guarantees accurate readings only for the ASUS Smart
Fan and the Intel boxed processor heatsink with fan because both have similar
heat distribution and heatsink material.
2.Connect the P2T-Cable to the CPU thermal sensor connector (R T2).
RT3
Thermal Sensor for Power Supply
RT2
Thermal Sensor for CPU
P2-99B
R
CPU
III. H/W SETUP
P2-99B CPU Thermal Sensor Connectors
NOTE: If you have a power supply with thermal monitoring, connect its thermal sensor cable to RT3.
Recommended Heatsinks for Slot 1 Processors
The recommended heatsinks for the Slot 1 processors are those with three-pin fans,
such as the ASUS Smart Fan, that can be connected to the motherboard’s CPU fan
connector . These heatsinks dissipate heat more efficiently and with an optional hardware monitor, they can monitor the fan’s RPM and use the alert function with the
Intel LANDesk Client Manager (LDCM) or the ASUS PC Probe software.
SECC Heatsink & FanSECC2 Heatsink & Fan
NOTE: The SEPP heatsink and fan (for Intel Celeron processors) is similar to the
SECC2 heatsink and fan except that the clamping design is different.
ASUS P2-99B User’s Manual25
4. Expansion Cards
W ARNING! 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 hard-
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.
Expansion Cards
III. H/W SETUP
5.Replace the computer system’s cover.
III. HARDWARE SETUP
ware or software settings for your expansion card, such as jumpers.
intend to use. Keep the bracket for possible future use.
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 PCI audio onboard, an extra IRQ will be used, leaving 5 IRQs
free. If your motherboard has ISA audio onboard, an extra 3 IRQs will be used,
leaving 3 IRQs free.
Both ISA and PCI expansion cards may require the use of 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
Windows directory to see a map of your used and free IRQs. If you use Windows 95,
the Resources tab under Device Manager displays the resource settings being used
by a particular device (to gain access, double-click the System icon under the Con-trol 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.
26ASUS P2-99B User’s Manual
III. HARDWARE SETUP
T o simplify this process this motherboard has complied 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 of the BIOS setup utility can be used to indicate which IRQs are being
used by Legacy cards. For older Legacy cards that do not work with the BIOS, you
can 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 has a card in it that requires an IRQ. To install a PCI
card, you need to set something called the INT (interrupt) assignment. Since all the
PCI slots on this motherboard use an INTA #, be sure that the jumpers on your PCI
cards are set 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 BIOS SETUP, 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 optional 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 (AGP)
This motherboard provides an accelerated graphics port (AGP) slot to support a new
generation of graphics cards with ultra-high memory bandwidth, such as an ASUS
3D hardware accelerator.
DMA Channels
III. H/W SETUP
P2-99B
P2-99B Accelerated Graphics Port (AGP)
R
ASUS P2-99B User’s Manual27
III. H/W SETUP
Connectors
III. HARDWARE SETUP
5. External Connectors
WARNING! Some pins are used for connectors or power sources. These are
clearly separated from jumpers in “Layout Contents.” Placing jumper caps over
these will cause damage to your motherboard.
IMPORTANT : Ribbon cables should always be connected with the red stripe on 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 some
floppy drives. IDE ribbon cables must be less than 18 in. (46 cm), with the second
drive connector no more than 6 in. (15 cm) from the first connector.
1.Keyboard Connector (5-pin)
This connector supports either a standard IBM-compatible, 101/102-key , or 104key keyboard (Windows 95-compatible). Use a PS/2 keyboard adapter in order
to connect a PS/2 keyboard to this AT connector.
Keyboard Connector (5-pin female)
P2-99B
P2-99B Keyboard Connector
R
This motherboard accepts an AT Keyboard
Connector Plug as shown here.
2.Floppy Disk Drive Cconnector (34-1 pin FLOPPY)
This connector supports the provided floppy 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).
Floppy Disk Drive Connector
P2-99B
P2-99B Floppy Disk Drive Connector
R
Pin 1
28ASUS P2-99B User’s Manual
III. HARDWARE SETUP
3.Parallel Port Connector (26-1 pin PARALLEL)
This connector supports the included parallel and PS/2 mouse connector set.
Connect the parallel ribbon cable to this connector and mount the bracket to the
case on an open slot. A PS/2 mouse connector is included if the optional USB/
MIR connector is not used. You can make available the parallel port and choose
the IRQ through “Onboard Parallel Port” in Chipset Features of BIOS SETUP.
(Pin 26 is removed to prevent inserting in the wr ong orientation when using
ribbon cables with pin 26 plugged).
NOTE: Serial printers must be connected to the serial port.
Connect the Red
stripe to Pin 1
Parallel Connector
P2-99B
P2-99B Parallel Connector
R
Pin 1
PS/2 Mouse Connector
4.Serial Port Headers (10-1 pin COM1/COM2)
These connectors support the provided serial port ribbon cables with mounting
bracket. Connect the ribbon cables to these connectors and mount the bracket to
the case on an open slot. You can make available the serial port and choose the
IRQ through “Onboard Serial Port” in Chipset Features of BIOS SETUP. (Pin
10 is removed to prevent inserting in the wrong orientation when using
ribbon cables with pin 10 plugged).
COM 2COM 1
Connectors
III. H/W SETUP
P2-99B
P2-99B Serial Port Headers
R
ASUS P2-99B User’s Manual29
Pin 1Pin 1
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