IWILL BS100 User manual

1
EC Declaration of Conformity
We
Iwill Corp.
No. 10, Wu Chuan 3rd Rd.,
Hsin Chuang City, Taipei,
Taiwan, R.O.C.
Declare under sole responsibility that the
BS100 motherboard
Meets the intent of Directive 89/336/ECC for Electromagnetic Compatibility. Compliance was
demonstrated to the following specifications as listed in the official Journal of the European
Communities:
EN 50081-1 Emissions:
EN 55022 Radiated, Class B
EN 55022 Conducted, Class B
EN 60555-2 Power Harmonics
EN 50082-1 Immunity:
IEC 801-2 Electrostatic Discharge
IEC 801-3 RF Radiate
IEC 801-4 Fast Transient

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About This Manual
This manual will introduce to the user how this product is consisted. All useful information will be
described in later chapters. Keep this manual for your future upgrade or system re-configuration.
Chapter 0 Overview
The features and specifications of this motherboard
Chapter 1 Quick Installation
The quick reference for experienced users
Chapter 2 Hardware Installation
The detailed information on jumper setting, connection, and hardware installation
Chapter 3 System BIOS Setup
The detail information of the system BIOS setup options
Chapter 4 SCSI BIOS Setup
The detail information of the SCSI BIOS setup options
Copyright
This manual contains information protected by copyright law. All rights are reserved. No any part
of this document may be used or reproduced in any forms or by any means, or stored in a database
or retrieval system without prior written permission from Iwill Corp.
This manual is subject to change without notice.
Trademark
Intel / Pentium are trademarks of Intel Corporation.
IWILL and IWILL logo are trademarks of IWILL Corp.
Sound Blaster is a registered trademark of Creative Technology Ltd.
Sound Blaster-LINK and SB-LINK are trademarks of Creative Technology Ltd.
And all other product names are trademarks and registered trademarks of their respective owners.
Warning
Most of the features of this product have passed strict verification and are subject to change at any
time without notice. If any malfunction occurs due to the future technical changes made by the
respective component manufacturers, Iwill assumes no responsibility or liability for it.

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Contents
CHAPTER 0.................................................................................................5
OVERVIEW.................................................................................................5
0.1 FEATURES ..............................................................................................5
0.2 ENVIRONMENT REQUIREMENTS...............................................................7
0.3 MOTHERBOARD COMPONENTS PLACEMENT.............................................8
0.4 BACK PANEL CONNECTORS...................................................................10
0.5 FORM FACTOR......................................................................................11
CHAPTER 1...............................................................................................12
QUICK INSTALLATION..........................................................................12
CHAPTER 2...............................................................................................15
HARDWARE INSTALLATION ................................................................15
2.1 PREPARATION AND INSPECTION .............................................................15
2.2 UNPACK THE BS100 .............................................................................15
2.3 INSTALLATION PROCEDURES..................................................................16
CHAPTER 3...............................................................................................25
SYSTEM BIOS SETUP..............................................................................25
3.1 INTRODUCTION.....................................................................................25
3.2 MAIN MENU.........................................................................................26
3.3 STANDARD CMOS SETUP ...............................................................27
3.4 BIOS FEATURES SETUP...................................................................30
3.5 CHIPSET FEATURES SETUP ............................................................33
3.6 POWER MANEGEMENT SETUP......................................................36
3.7 PNP/ PCI CONFIGURATION .............................................................39
3.8 INTEGRATED PERIPHERALS ..........................................................40
3.9 LOAD SETUP DEFAULTS.................................................................43
3.10 SUPERVISOR / USER PASSWORD SETTING ................................43
3.11 IDE HDD AUTODETECTION..........................................................43
3.12 SAVE & EXIT SETUP.......................................................................43
3.13 EXIT WITHOUT SAVING................................................................43

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CHAPTER 4...............................................................................................45
SCSI BIOS SETUP.....................................................................................45
4.1 INTRODUCTION.....................................................................................45
4.2 CONFIGURE/VIEW HOST ADAPTER SETTINGS ........................................45
4.3 SCSI DISK UTILITIES............................................................................50

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Chapter 0
Overview
Thank you for purchasing Iwill BS100 motherboard.This operation manual will instruct you how to
configure and install the system properly. It contains an overview about the engineering design and
features of this product. Also, this manual provides useful information for later on upgrade or
configuration change. Keep this for your future need.
YEAR 2000 issue
The IBM compatible PC utilizes a Motorola MC146818 compatible Real Time Clock (RTC) chip to
maintain the date and time. Unfortunately, the “century”is not manipulated by the RTC. It uses 8-
bit of information to report the year and can only hold the last two digits of a year in packed BCD
format. So 1997 is reported solely as 97. Since the RTC also contains non-volatile memory, IBM
specified a location in the memory to hold “century”information. By combining the century data
with the year data, software can obtain a full 4-digit year. When the Year 2000 occurs, the RTC
reports the year as ’00’and the “century”in RTC memory will contain ’19.’Combining the full 4-
digit year yields 1900, not 2000. Any applications which compares dates, or uses relative dates to
perform functions will see an incorrect dates.
Motherboards contain BIOS, which is one of the key ingredients to check for systems designed to
handle the year 2000. All motherboards currently shipped from Iwill contain BIOS capable of
handling the year 2000 date correctly. The BIOS contains a feature that checks the least two
significant digits of the year stored in the RTC during each BIOS request (INT 1Ah) to read the
date and, if less than `80', updates the century byte to `20'. This feature enables operating systems
and applications using the BIOS date/time services to reliably manipulate the year as a four-digit
value.
Be aware that the BIOS capability alone does not ensure that the system will handle the transition
correctly. Other system components such as the operating system and application software also
need to be able to handle the year 2000 date and recognize the date format from other pieces.
0.1 Features
0.1.1 Processor
Single Pentium® II processor support
Supports 100 MHz and 66 MHz bus speed
Supports all published Pentium® II processor voltages
S.E.C. (Single Edge Contact) cartridge Slot 1 connector
Easy-jumper to set the processor speed from 233 MHz to 500 MHz

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0.1.2 Core Logic
Intel 82443BX PCI/A.G.P. controller
Integrated DRAM controller
Integrated PCI bus mastering controller
Integrated Accelerated Graphics Port (A.G.P.) bus controller
Intel 82371EB PCI/ISA/IDE Xcelerator (PIIX4E)
Multifunction PCI-to-ISA bridge (PCI Rev 2.1 compliant)
Integrated IDE controller with Ultra DMA/33 support
USB host interface with support for two USB ports
Enhanced DMA controller and standard Interrupt controller and Timer function
System Management Bus (SMB) with support for DIMM Serial PD
0.1.3 Main Memory
Four 168-pin DIMM (Dual In Line Memory Module) sockets
Supports up to 1 GB of 3.3 V Unbuffered SDRAM or Registered DIMM
Supports up to 1 GB of 3.3 V Extended Data Out (EDO) memory
64-bit data interface with ECC support (SDRAM only)
0.1.4 SCSI Subsystem
Adaptec AIC-7895 PCI Bus Master SCSI Host Adapter
Dual SCSI channel supported
Providing up to 40 MB/sec sustained throughput per channel
Supports burst data transfer on the PCI bus up to 133 MB/sec
Providing two Ultra Wide 68-pin connectors and one 50-pin connector
Adaptec RAIDport II interface supported
0.1.5 Multi I/O
ALI M5135 super I/O controller
Supports two floppy disk drives (include 3 Mode drive) and/or QIC-80 tape drive
Supports one multi-mode parallel port
Supports two high speed 16550 FIFO serial ports
Integrated keyboard controller
Integrated PS/2 mouse controller

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0.1.6 Expansion slots
Three ISA slot
Three PCI slot
One shared ISA/PCI slot
One A.G.P. slot
0.1.7 Form Factor
Compliance with ATX Version 2.01 specification
Supports ATX power supply connector
Supports the remote on/off switch
Physical dimensions: length: 245 mm / width: 305 mm
0.1.8 Manageability
Optional Hottek HT 82H791 System Hardware Monitor
Wake on LAN header for use with add-in network interface cards (NICs)
0.1.9 Other features
Award BIOS
Using Flash ROM to provide on-board-upgrade ability without changing components
Plug and Play compatible
Supports Advanced Power Management (APM)
Supports Creative SB-LINK to deliver Sound Blaster 16 compatibility
0.2 Environment Requirements
Temperature 0-55 degrees C (operating or storage)
5% to 95% non-condensing relative humidity
At least a 250 W power supply
The power supply must comply with the following recommendations found in the spec.:
The potential relation between 3.3 VDC and +5 VDC power rails
The current capability of the +5VSB line
All timing parameters

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0.3 Motherboard Components Placement
The following figure shows the location of the motherboard components.
FAN1
S2
S1
LPT
SLOT1
USB
KB/MS
JP5
RAIDport II
CH-B
PWR ON
DIMM0~3
WOL
LID-ON
GND
5VSB
1
3
GND
+12V
SENSE
1
3
JP3
350
400
450
500
RS0
RS1
1
10
11
20
RST SLED ALED
KL
SPKR
Cathode-
Anode+
GND
Reset
VCC
Cathode-
Anode+
Cathode-
NC
Anode+
Buzz
GND
Keylock
GND
NC PLED
1
1
1
1
1
1
Tmp3
Tmp2
J37
FAN2
AGP
IDE0
IDE1
FDC
CH-A
CH-B
PCIx
J21-23
FAN3
1--2: SCSI Enable
2--3: SCSI Disable
1
JP2
GNT#
1
5
6
2
GND
REQ#
GND
SIRQ
SB-LINK
1
NC
NC
VCC
IRRX
GND
IRTX
IRMODE
7
IR
Tmp1
1
1--2:Normal
2--3:Clear CMOS
JP1
CPU 1st Cap 2nd Cap
233MHz 350 ON RS0 ON
266MHz 400 ON RS0 ON
300MHz 450 ON RS0 ON
333MHz 500 ON RS0 ON
350MHz 350 ON none
400MHz 400 ON none
450MHz 450 ON none
500MHz 500 ON none

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Location ScreenPrinting Description
J3 Slot1 Processor Slot 1 connector
J5--J8 DIMM0--3 168-pin DIMM Sockets
J11 AGP A.G.P. connector
J12--J15 PCI1--4 PCI expansion slots
J20 RAIDport II Adaptec RAIDport II connector
J21--J23 J21--J23 ISA expansion slots
J25 CH-A Narrow SCSI connector of Channel A
J26 CH-A Wide SCSI connector of Channel A
J27 CH-B Wide SCSI connector of Channel B
J28 IDE 0 Primary IDE connector
J29 IDE 1 Secondary IDE connector
J30 FDC Floppy drive connector
J31 S1 Serial 1 connector
J32 S2 Serial 2 connector
J33 LPT Parallel connector
J34 USB Two USB connectors
J35 KB/MS PS/2 keyboard and mouse connectors
J37 J37 Standard ATX power connector
J39 FAN1 Processor fan header
J40 FAN2 System fan header
J41 FAN3 System fan header
J42 PWR ON Remote power on/off header
J43 J43 Front panel I/O header
ALED (pins 5--6): IDE LED header
SLED (pins 7--8): SCSI LED header
RST (pins 9--10): Reset Switch header
PLED (pins 11--13): Power LED header
KL (pins 14--15): Keylock switch header
SPKR (pins 17--20): Speaker header
J44 SB-LINK Creative SB-LINK header
J45 IR IR (infrared) connector
J46 WOL Wake On LAN header
J49 Tmp1 Temperiture sensor header
J50 Tmp2 Temperiture sensor header
J51 Tmp3 Temperiture sensor header
JP1 CLRTC Jumper for clearing CMOS
JP2 JP2 Jumper for SCSI enable/disable
JP3 JP3 Jumper for processor frequency selection
JP5 JP5 Jumper for PCI devices compatibility

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0.4 Back Panel Connectors
The following figure shows the location of the back panel I/O connectors, which include:
PS/2-style keyboard and mouse connectors
Two USB connectors
Two serial port connectors
One parallel port connector
Serial 1
Mouse
Keyboard
Parallel
Serial 2
USB1
USB0

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0.5 Form Factor
The motherboard is designed to fit into an ATX form-factor chassis. The I/O connector locations
and the mounting hole locations are in compliance with the ATX specification. Please see detail
in the following figure.
Datum (0, 0)
A
B
C
D
E
F
G
H
I
J
K
6.250
REAR I/O WINDOW IN CHASSIS
M
0.156 inch
Mounting Holes
L
0.800 TYP.
Between
Connectors
0.812 Pin 1 ISA
to Pin 1 PCI
0.768 Pin 1 AGP
to Pin 1 PCI
A: 0.400 inch H: 0.150 inch
B: 1.000 inch I: 0.650 inch
C: 1.300 inch J: 5.550 inch
D: 1.625 inch K: 11.750 inch
E: 2.630 inch L: 12.000 inch
F: 6.500 inch
G: 9.350 inch
M: 9.646 inch

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Chapter 1
Quick Installation
Several easy installation steps will be described in this chapter to help the experienced users with
quick installation. If you are a beginner or need to know more about this product, refer to the
Chapter 2.
Step 1. Install retention mechanism and Pentium II processor
There is one set of the thread studs that need to be screwed to the Slot 1’s retention mechanism with
a criss-cross screwdriver. Insert the Pentium II processor along the retention mechanism in vertical
direction down to Slot 1 connector. Make sure that they are connected thoroughly.
Step 2. Install processor fan
Attach the processor cooler’s power cable to the header marked “FAN1”.
Step 3. Select the processor frequency
JP3 is used to select the processor frequency. Simply place one jumper cap onto the speed number
according to the internal frequency you see on your processor. For example: select 400 for a
Pentium II processor 400 MHz.
Step 4. Install the memory module
At least one piece of 168-pin 3.3V unbuffered SDRAM, Registered DIMM or EDO DIMM is
needed to be located into the DIMM sockets.
Step 5. Connect the internal peripherals
The internal peripherals means devices that are in the computer chassis like the floppy disk drive,
hard disk drive, CD-ROM drive …etc. There are one 34-pin flat cable for floppy disk drive and one
40-pin flat cable for IDE devices included in your retail package. The protected key on cables’
connector will guide you the correct direction when you insert the cables.
Step 6. Connect the Reset button
The 2-pin reset header is located on pins 9--10 (marked as RST) of the front panel connector.
Connect the momentary type switch on the chassis to this header for reset function.
Signal of RST header
Pin 9 RESET
Pin 10 Ground

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Step 7. Connect the Speaker
The 4-pin speaker header is located on pins 17--20 (marked as SPKR) of the front panel connector.
Connect the speaker to this header.
Signal of SPKR header
Pin 17 VCC
Pin 18 Ground
Pin 19 NC
Pin 20 BUZZ
Step 8. Connect the power LED
The power LED header is located on pins 11--13 (marked as PLED) of the front panel connector.
Connect chassis’s power LED to this header.
Signal of PLED header
Pin 11 Anode (+)
Pin 12 NC
Pin 13 Cathode (-)
Step 9. Connect the keylock switch
The keylock header is located on pins 14--15 (marked as KL) of the front panel connector. Connect
chassis’s keylock switch (if supported) to this header.
Signal of KL header
Pin 14 KEYLOCK
Pin 15 Ground
Step 10. Connect the IDE LED
The 2-pin IDE LED header is located on pins 5--6 (marked as ALED) of the front panel connector.
Connect the chassis’s LED to this header.
Signal of ALED header
Pin 5 Anode (+)
Pin 6 Cathode (-)
Step 11. Connect the SCSI LED
The 2-pin SCSI LED header is located on pins 7--8 (marked as SLED) of the front panel connector.
Connect the chassis’s LED to this header.
Signal of SLED header
Pin 7 Anode (+)
Pin 8 Cathode (-)

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Step 12. Connect the Power ON button
All the ATX computer chassis provide a power on button. Connect the button to the header
marked as “PWR ON”.
Step 13. Install the Power Supply cord
This motherboard provides the 20-pin ATX power connector. This works conjunction with the
Power On button to provide remote On/Off function.
Step 14. Install the Keyboard
Connect the keyboard to the PS/2 keyboard connector at the back panel.
Step 15. Install the Display Card
Insert the display card into the ISA, PCI or AGP expansion slot.
Step 16. Connect the External Peripherals
The external device means devices outside the computer chassis like the serial mouse, printer, PS/2
mouse, external modem…etc.
Step 17. Power on the system
Once the system is powered on, make sure you enter the BIOS setup program and load the
manufacturer’s default settings. After the system reboot, you are ready to install your operating
system and we wish you to enjoy it.

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Chapter 2
Hardware Installation
2.1 Preparation and Inspection
This motherboard, like all other electronic equipment, is static sensitive. Please take the proper
precautions when handling it. If possible, ground yourself by touching a metal table or your
computer frame. Keep the board in its conductive wrapping until it is configured and ready to be
installed in your system.
2.2 Unpack the BS100
You should find the following components when opening the box:
One motherboard
This operation manual
One 40-pin IDE cable
One 34-pin floppy cable
One 50-pin Narrow SCSI cable
One 68-pin Wide SCSI cable
One Bus Master Driver diskette
One EZ-SCSI Driver diskette
One EZ-SCSI manual (OEM)
Two Adaptec 7800 FMS Driver diskettes
One Adaptec 7800 FMS Manual
One set of Pentium® II Retention kit
One LANDesk Client Management CD (Optional)
One External SCSI-II expansion Kit (Optional)
For installation, you may need some or all of the following tools:
Medium size flat blade screwdriver
Medium sized Phillips head screwdriver
A 3/16 inch nut driver or wrench

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2.3 Installation procedures
2.3.1 Processor (Slot 1 and FAN1)
The motherboard supports single Pentium® II processor. The processor’s VID pins automatically
program the voltage regulator on the motherboard to the required processor voltage. The
motherboard currently supports processors that run internally from 233 MHz to 500 MHz.
The Pentium® II processor is packaged in a Single Edged Contact (S.E.C.) cartridge. The cartridge
includes the processor core, second-level cache, thermal plate and back cover. The processor
connects to the motherboard through the Slot 1 connector, a 242-pin edge connector. When
mounted in a Slot 1 connector, the processor is secured by a retention mechanism attached to the
motherboard.
First, screw the main body of Slot 1 retention mechanism to the motherboard then insert the
processor cartridge along the retention mechanism in vertical direction. A “click”sound will be
heard while the processor is located right in position. Finally, attach the cooler’s power cable to the
processor fan header on the motherboard.
Signal of FAN1 header (processor fan header)
Pin 1 Ground
Pin 2 +12 V
Pin 3 SENSE
Note 1. Processor cooler is always required to prevent over-heat.
Note 2. The second-level cache is located on the substrate of the S.E.C. cartridge. The cache
size and cacheable memory size are dependent on the processor used.
2.3.2 Processor frequency Selection (JP3)
JP3 is a 2x6-pin jumper block with Easy-jumper cap on it for you to select the processor’s working
speed easily.
350 400 450 500 RS0 RS1 Processor
ON OFF OFF OFF ON OFF For Pentium® II 233 MHz
OFF ON OFF OFF ON OFF For Pentium® II 266 MHz
OFF OFF ON OFF ON OFF For Pentium® II 300 MHz
OFF OFF OFF ON ON OFF For Pentium® II 333 MHz
ON OFF OFF OFF OFF OFF For Pentium® II 350 MHz
OFF ON OFF OFF OFF OFF For Pentium® II 400 MHz
OFF OFF ON OFF OFF OFF For Pentium® II 450 MHz
OFF OFF OFF ON OFF OFF For Pentium® II 500 MHz

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Note: This jumper is able to provide more powerful functions, which are reserved for
technician’s special testing purpose only. DO NOT use these functions unless you are an
experienced user and you are willing to take your risk.
350 400 450 500 Multiplier RS0 RS1 External Clock
OFF OFF OFF OFF x 2 OFF OFF 100 MHz
ON OFF ON OFF x 2.5 ON OFF 66 MHz
ON ON OFF OFF x 3 OFF ON Reserved
ON OFF OFF OFF x 3.5 ON ON Reserved
OFF ON OFF OFF x 4
OFF OFF ON OFF x 4.5
OFF OFF OFF ON x 5
OFF OFF ON ON x 5.5
OFF ON OFF ON x 6
ON OFF OFF ON x 6.5
2.3.3 Main memory (DIMM0--3)
The motherboard has four dual inline memory module (DIMM) sockets, which supports memory
size from 8 MB to 1 GB with SDRAM and EDO DRAM. The Synchronous DRAM (SDRAM)
improves memory performance through memory access that is synchronous with the memory clock.
The Error Checking and Correcting (ECC) memory improves system security by detecting and
correcting error bit when accessing memory.
The motherboard supports the following memory features:
JEDEC MO-161 compliant 168-pin DIMMs with gold-plated contacts
3.3 V memory module only
ECC logic detects multiple-bit errors and corrects single-bit errors (SDRAM)
Unbuffered SDRAM, Registered DIMM or 60-ns 3.3 V EDO DIMMs
16 / 64 Mbit DRAM technology
Symmetrical and asymmetrical DRAM addressing
Single-sided or double-sided DIMMs
3.3 V EDO and SDRAM DIMMs can NOT be installed on the same motherboard
Memory can be installed in DIMM sockets without any order restriction. The memory type, size,
speed can vary between sockets. The BIOS automatically detects memory type, size and speed.
Note 1. In order to reduce the loading, the total memory chip count installed on the system
should not exceed 72 unless the Registered DIMMs are used.

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Note 2. The Serial Presence Detect (SPD) information is highly recommended on all 100
MHz DIMMs for this motherboard. This function is implemented using an EEPROM
component on the memory module. The nonvolatile storage device contains data
programmed by the DIMM manufacturer that identifies the module type and various
SDRAM organization and timing parameters. A warning message will be prompted if any
DIMMs installed on this motherboard has no SPD EEPROM. In this case, the system might
fail to be stable without correct timing parameters.
2.3.4 Accelerated Graphics Port (AGP)
The Accelerated Graphics Port (A.G.P.) is a high-performance interconnect, especially for graphic-
intensive 3D applications. A.G.P. is independent of the PCI bus and is intended for exclusive use
with graphical display devices. The A.G.P. supports AC timing for 133 MHz data transfer rates,
allowing data throughput of 533 MB/sec.
The most important feature of A.G.P. is DIME (Direct Memory Execute). DIME needs to allocate
some system memory via the O.S. to access large textures outside the local graphic memory of the
card. In order to take advantage of DIME feature, some software components should be installed or
upgraded in the system.
For Windows NT 4.0: Upgrade to "Windows NT 4.0 Service Pack 3".
For Windows 95: Upgrade to Windows 95 OSR 2.1.
Install DirectX 5 from Microsoft.
2.3.5 Primary/Secondary IDE connectors (IDE0 and IDE1)
The motherboard has two bus-mastering IDE interfaces, which support PIO Mode 3 / 4 and Ultra
DMA 33 mode transfer. These interfaces support IDE disks, ATAPI devices (ex: CD-ROM), ZIP
and LS-120 devices. If two devices are connected to one channel, one should be set to "Master" and
the other one to "Slave" (Refer to device operation guide).
Simply connect the 40-pin IDE cable between the IDE/ATAPI devices and these connectors on the
motherboard. For a performance reason, we suggest that connect the disk drive to the primary
channel and other devices like CD-ROM to the secondary channel.
2.3.6 Floppy drive connector (FDC)
The motherboard has one floppy interface, which supports 360K, 720K, 1.2M, 1.44M, 2.88M, 3
Mode floppy drives and QIC-80 Floppy tape drive. It supports up to two devices in any capacity
with the same connector. Simply connect 34-pin floppy cable between this connector and floppy
drives.
2.3.7 Serial port connector (S1 and S2)
The two 9-pin D-Sub serial port connectors on the back panel are compatible with 16550 UART.
These ports are used for serial mouse, serial printer, fax modem…etc. Simply connect the serial
devices to these connectors.

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2.3.8 Parallel port connector (LPT)
The connector for the multi-mode parallel port is a 25-pin D-Sub connector located on the back
panel. It is used for the printer or other parallel devices. Simply connect the parallel cable between
devices and the parallel port connector.
2.3.9 Universal Serial Bus (USB)
The USB is suitable for mid-to-low speed devices like mouse, keyboard, joystick...etc. In the past,
all these devices were using different connectors, and it is difficult for end users to install the
system. With USB technology, users only need to plug all their USB peripherals on the connector
in chain and ready to go.
The motherboard supports following USB features:
Self-identifying, hot pluggable peripherals
Support of isochronous and asynchronous transfer type
Supports for a maximum of 127 physical devices
Supports data transfer rate up to 12 Mbit/sec
The motherboard has two USB ports; any USB peripheral can be connected to either port. For more
than two USB devices, an external hub can be connected to either port.
2.3.10 PS/2 keyboard and mouse connectors (KB/MS)
The keyboard connector is a 6-pin mini-DIN connector located on the back panel (the bottom one).
Simply connect the standard PS/2 keyboard into this connector. The PS/2 mouse connector is a 6-
pin mini-DIN connector on the back panel. Simply connect the PS/2 mouse into this connector.
Note that power to the computer should be turned off before a keyboard and/or mouse is
connected or disconnected.
2.3.11 ATX power connector (J37)
This motherboard supports an ATX power connector. Simply connect the power cord of power
supply to this connector.
Signal of ATX power supply connector
Pin 1 +3.3 V Pin 11 +3.3 V
Pin 2 +3.3 V Pin 12 -12 V
Pin 3 Ground Pin 13 Ground
Pin 4 +5 V Pin 14 PWR_ON#
Pin 5 Ground Pin 15 Ground
Pin 6 +5 V Pin 16 Ground
Pin 7 Ground Pin 17 Ground
Pin 8 PWRGOOD Pin 18 -5 V
Pin 9 +5VSB Pin 19 +5 V
Pin 10 +12 V Pin 20 +5 V

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2.3.12 System fan header (FAN2 and FAN3)
The system airflow is critical for system’s reliability. Airflow is determined by the size and number
of fans and vents along with the placement in relation to the components and the airflow channels
within the system.
The motherboard supports two extra system fan headers: FAN2 and FAN3. Connect the system
cooler’s power cable to this header to move the air through the chassis.
Signal of FAN2/3 header
Pin 1 Ground
Pin 2 +12 V
Pin 3 SENSE
2.3.13 Power On header (PWR ON)
This header can be connected to chassis’s power switch. Because of debounce circuitry on the
motherboard, the switch must be pressed for at least 50 ms to signal the power supply to switch on
or off. At least two seconds must pass before the power supply will recognize another on/off signal.
Note: Hold the power on switch in for four seconds will force the system switch off.
2.3.14 Front panel connector (J43)
This connector contains several headers, which are connected to button or switch located on front
panel of the chassis.
2.3.14.1 IDE LED header (ALED)
The 2-pin IDE LED header is located on pins 5--6 (marked as ALED) of the front panel
connector. It can be connected to an LED on the chassis, which will light up when IDE
devices is working.
Signal of ALED header
Pin 5 Anode (+)
Pin 6 Cathode (-)
2.3.14.2 SCSI LED header (SLED)
The 2-pin SCSI LED header is located on pins 7--8 (marked as SLED) of the front panel
connector. It can be connected to an LED on the chassis, which will light up when SCSI
devices is working.
Signal of SLED header
Pin 7 Anode (+)
Pin 8 Cathode (-)
S
S