MSI 945GM User Manual

MS-9641 (V1.X) Mainboard

G52-96411x1

i

Copyright Notice

The material in this document is the intellectual property of MICRO-STAR
INTERNATIONAL. We take every care in the preparation of this document, but no

guarantee is given as to the correctness of its contents. Our products are under
continual improvement and we reserve the right to make changes without notice.

Trademarks

All trademarks are the properties of their respective owners.
NVIDIA, the NVIDIA logo, DualNet, and nForce are registered trademarks or trade-

marks of NVIDIA Corporation in the United States and/or other countries.
AMD, Athlon™, Athlon™ XP, Thoroughbred™, and Duron™ are registered trade­marks of AMD Corporation.
Intel® and Pentium® are registered trademarks of Intel Corporation.
PS/2 and OS®/2 are registered trademarks of International Business Machines
Corporation.
Windows® 95/98/2000/NT/XP are registered trademarks of Microsoft Corporation.
Netware® is a registered trademark of Novell, Inc.
Award® is a registered trademark of Phoenix Technologies Ltd.
AMI® is a registered trademark of American Megatrends Inc.

Revision History

Revision Revision History Date

V1.0 First release for PCB 1.X May 2006

with Intel 945GM & ICH7R

Technical Support

If a problem arises with your system and no solution can be obtained from the user’ s
manual, please contact your place of purchase or local distributor. Alternatively,
please try the following help resources for further guidance.

Visit the MSI website for FAQ, technical guide, BIOS updates, driver updates,
and other information: http://www.msi.com.tw/program/service/faq/

faq/esc_faq_list.php

Contact our technical staff at: http://support.msi.com.tw

ii

Safety Instructions

1. Always read the safety instructions carefully.

2. Keep this User’s Manual for future reference.

3. Keep this equipment away from humidity.

4. Lay this equipment on a reliable flat surface before setting it up.

5. The openings on the enclosure are for air convection hence protects the equip­ment from overheating. DO NOT COVER THE OPENINGS.

6. Make sure the voltage of the power source and adjust properly 110/220V be­fore connecting the equipment to the power inlet.

7. Place the power cord such a way that people can not step on it. Do not place
anything over the power cord.

8. Always Unplug the Power Cord before inserting any add-on card or module.

9. All cautions and warnings on the equipment should be noted.

10. Never pour any liquid into the opening that could damage or cause electrical
shock.

11. If any of the following situations arises, get the equipment checked by a service
personnel:

† The power cord or plug is damaged.
† Liquid has penetrated into the equipment.
† The equipment has been exposed to moisture.
† The equipment has not work well or you can not get it work according to

User’s Manual.

† The equipment has dropped and damaged.
† The equipment has obvious sign of breakage.

12. DO NOT LEAVE THIS EQUIPMENT IN AN ENVIRONMENT UNCONDITIONED, STOR­AGE TEMPERATURE ABOVE 600 C (1400F), IT MAY DAMAGE THE EQUIPMENT.

CAUTION: Danger of explosion if battery is incorrectly replaced.
Replace only with the same or equivalent type recommended by the
manufacturer.

iii

FCC-B Radio Frequency Interference Statement

This equipment has been
tested and found to comply
with the limits for a Class B
digital device, pursuant to Part
15 of the FCC Rules. These limits are designed to provide reasonable protection
against harmful interference in a residential installation. This equipment generates,
uses and can radiate radio frequency energy and, if not installed and used in accor­dance with the instructions, may cause harmful interference to radio communications.
However, there is no guarantee that interference will not occur in a particular
installation. If this equipment does cause harmful interference to radio or television
reception, which can be determined by turning the equipment off and on, the user is
encouraged to try to correct the interference by one or more of the measures listed
below.

† Reorient or relocate the receiving antenna.
† Increase the separation between the equipment and receiver.
† Connect the equipment into an outlet on a circuit different from that to

which the receiver is connected.

† Consult the dealer or an experienced radio/television technician for help.

Notice 1

The changes or modifications not expressly approved by the party responsible for
compliance could void the user’s authority to operate the equipment.

Notice 2

Shielded interface cables and A.C. power cord, if any, must be used in order to
comply with the emission limits.

VOIR LA NOTICE D’INSTALLATION AVANT DE RACCORDER AU RESEAU.

Micro-Star International

MS-9641

This device complies with Part 15 of the FCC Rules. Operation is subject to the
following two conditions:

(1) this device may not cause harmful interference, and
(2) this device must accept any interference received, including interference that

may cause undesired operation.

iv

WEEE (Waste Electrical and Electronic Equipment) Statement

v

vi

vii

CONTENTS

FCC-B Radio Frequency Interference Statement..........................................................ii

Copyright Notice..............................................................................................................iii

Technical Support..........................................................................................................iv

Safety Instructions.........................................................................................................iv

WEEE Statement..............................................................................................................v

Chapter 1. Getting Started....................................................................................1-1

Mainboard Specifications...................................................................................1-2

Mainboard Layout................................................................................................1-4

Chapter 2. Hardware Setup..................................................................................2-1

Quick Components Guide....................................................................................2-2

CPU (Central Processing Unit)............................................................................2-3

CPU & Cooler Set Installation......................................................................2-4

Memory.................................................................................................................2-6

Introduction to DDRII SDRAM......................................................................2-6

DIMM Module Combination...........................................................................2-6

Installing DDRII Modules...............................................................................2-7

Power Supply......................................................................................................2-8

ATX 24-Pin Power Connector: ATX1.........................................................2-8

ATX 12V Power Connector: JPW0............................................................2-8

Important Notification about Power Issue..................................................2-9

Back Panel..........................................................................................................2-10

Connectors........................................................................................................2-12

Hard Disk Connector: IDEB0.....................................................................2-12

Chassis Intrusion Switch Connector: JCI1..............................................2-12

Compact Flash Card Slot: CF0..................................................................2-12

Serial ATAII Connectors: SATA1~SATA4.................................................2-13

Fan Power Connectors: CPUFAN0, SYSFAN1, PWRFAN0.....................2-14

Front Panel Connectors: JFP1..................................................................2-14

Front USB Connectors: F_USB2..............................................................2-15

FWH/LPC Debugging Pin Header: JLPC1.................................................2-16

Serial Port Connector: COM0....................................................................2-16

Power Select: J5.......................................................................................2-16

TV-Out Connector: JTV0...........................................................................2-17

I2C Bus Connector: SM_BUS...................................................................2-18

LAN_LED....................................................................................................2-18

LAN_BY PASS LED: J3.............................................................................2-18

Jumpers..............................................................................................................2-23

viii

Clear CMOS Jumper: CLR_CMOS0..........................................................2-23

JCF_SEL & JCFV_SEL..............................................................................2-24

Slots....................................................................................................................2-25

Golden Finger.............................................................................................2-25

PCI (Peripheral Component Interconnect) Slots......................................2-27

ix

Getting Started

Chapter 1

Getting Started

Thank you for choosing the MS-9641 v1.x Micro-ATX
mainboard. The mainboard is based on Intel® 945GM
and Intel® ICH7R chipset for optimal system efficiency.
Designed to fit the advanced Intel® Core Duo/Core
Solo Series processor, the mainboard delivers a high
performance and professional desktop platform solution.

1-1

MS-9641 Mainboard

Mainboard Specifications

Processor Support

- Intel® Core Duo/Core Solo Series processors in the 478 Micro
FC-PGA package.

- Supports 3/4 pin CPU Fan Pin-Header with Fan Speed Control.

- Supports Intel Core Duo Technology.

Supported FSB

- 533/ 667 MHz

Chipset

- North Bridge: Intel® 945GM chipset

- South Bridge: Intel® ICH7R chipset

Memory Support

- DDRII 533/667 SDRAM (2GB Max)

- 2 DDRII DIMMs (240pin / 1.8V)

LAN

- Supports 6 PCI Expresss GB Lan by Intel 82573L

- Supports Ethernet by pass function with Programming Relay(4 ports)

IDE

- 1 IDE port by ICH7R (44-pin connector)

- Supports Ultra DMA 66/100 mode

SATA

- 4 SATA II ports by ICH7R

- Supports four SATA II devices

- Supports storage and data transfers at up to 300MB/s

CF

- Supports 1 Compact Flash connector

Connectors

Backpannel

- 6 x RJ45 Gigabit LAN ports

- 2 USB 2.0 ports

- 1 serial port

1-2

On-Board Pinheaders

- 1 COM0 pinheader

- 1 USB 2.0 pinheader

Slots

- 1 PCI slot

Form Factor

- Micro-ATX (24.3cm X 22.7 cm)

Mounting

- 8 mounting holes

Accessory

- CPU Retention Module

- CPU Cooler

Getting Started

1-3

MS-9641 Mainboard

BIOS

Intel

945GM

Intel

ICH7R

J5

SMBus

Mainboard Layout

COM1

JUSB0

JLAN0

JLAN1

JLAN2

JLAN3

JLAN4

JLAN5

JVGA0

COM0

DIMM1
DIMM0

ATX1

AUXFAN0

CPU Keepout zone

J3

JTV0

J2

F_USB2

PCI 0

BATT

LAN LED

+

PCIE X4 & PCI Bus on Edge

CLR_CMOS0

MS-9641 Series v1.X Micro-ATX Mainboard

SYSFAN1

SATA4

SATA2

JCF_SEL

J0

Winbond

W83627EHG

JPW0

SATA3

JFP1

CPUFAN0

IDEB0

MH4

JCFV_SEL

JLPC1

SATA1

1-4

Hardware Setup

Chapter 2

Hardware Setup

This chapter provides you with the information about
hardware setup procedures. While doing the installation,
be careful in holding the components and follow the
installation procedures. For some components, if you
install in the wrong orientation, the components will not
work properly.

Use a grounded wrist strap before handling computer
components. Static electricity may damage the
components.

2-1

MS-9641 Mainboard

Quick Components Guide

AUXFAN0,

JCOM0,

p.2-16

ATX1, p.2-8

p.2-14

SYSFAN1,
p.2-14

SM_BUS,
p.2-18

DIMM0/1,
p.2-6

JPW0,
p.2-9

Back Panel,
p.2-10

J3,
p.2-18

PCI 0,
p.2-24

CLR_CMOS0,
p.2-20

LAN_LED,
p.2-18

J5, p.2-16

JTV0,

p.2-17

F_USB2,
p.2-15

Golden Finger,
p.2-22

JFP1,
p.2-14

JCF_SEL,
p.2-21

CPUFAN0,
p.2-14

CPU,
p.2-3

IDEB0,
p.2-12

CF0, p.2-12

JLPC1,

p.2-16

JCFV_SEL,
p.2-21

SATA1~4,
p.2-13

2-2

Hardware Setup

CPU (Central Processing Unit)

The mainboard supports Intel® Core Duo/Core Solo processor in the 478
pin package. The mainboard uses a CPU socket called mPGA478 for easy CPU
installation. When you are installing the CPU, make sure the CPU has a heat sink

and a cooling fan attached on the top to prevent overheating.

Important

1. Overheating will seriously damage the CPU and system. Always make
sure the cooling fan can work properly to protect the CPU from overheating.

2. Make sure that you apply an even layer of heat sink paste (or thermal tape)
between the CPU and the heatsink to enhance heat dissipation.

3. While replacing the CPU, always turn off the ATX power supply or unplug
the power supply’s power cord from the grounded outlet first to ensure the
safety of CPU.

2-3

MS-9641 Mainboard

CPU & Cooler Set Installation

1. Loose the screw on the CPU socket with a tank screwdriver in clockwise
direction.

2. Place the CPU on top of the socket. Make sure to align the gold arrow on the
CPU with the arrow key on the socket.

4. On the front end of the CPU socket is a
locking mechanism designed into the
form of a screw. Make sure that you
actuate or deactuate this mechanism
with a screwdriver before and after
installing the CPU.

3. Push the CPU down until its
pins securely fit into the
socket.

2-4

5. Lift up the levers on both sides.

Hardware Setup

5. Mount the cooler set (fan & heatsink
bundled) on top of the CPU and fit it
into the retention mechanism.

6. Secure the levers to lock the cooler
set.

7. Connect the fan power cable from
the mounted fan to the 3-pin fan
power connector on the board.

2-5

MS-9641 Mainboard

Memory

The mainboard provides 2 slots for 240-pin DDRII DIMM, which supports the
memorysize up to 2GB.Since DDRII modules are not interchangeable with DDR1 and
the DDRII standard is not backward compatible, you should always install DDRII
memory module in the DDRII slot (DIMM0~DIMM1). Otherwise, you are not able to boot
up your system and your mainboard might be damaged.

DIMM1
DIMM0

Introduction to DDRII SDRAM

DDRII is a new technology of memory module, and its speed is the top limit of
current DDR1 technology. DDRII uses a 1.8V supply for core and I/O voltage, com­pared to 2.5V for DDR1, and requires 28% less power than DDR1 chips. DDRII truly
is the future of memory, but will require some changes as the technology is not
backwardly compatible and only motherboards specifically designed for DDRII memory
will be able to support these chips.

DDRII incorporates new features at the chip level that give it better signal
integrity, thereby enabling higher clock speeds.

DDRII modules have 240 pins, versus 184 pins on a DDR1 module, and the
length of DDRII module is 5.25”. DDRII modules have smaller and tighter spaced pins.
The height of DDRII modules varies, but they will typically be less than 1.3” in height.

DIMM Module Combination

Install at least one DIMM module on the slots. Each DIMM slot supports up to a
maximum size of 1GB. Users can install either single- or double-sided modules to
meet their own needs. Please note that each DIMM can work respectively for

single-channel DDRII, but there are some rules while using dual-channel
DDRII. Users may install memory modules of different type and density on different-

channel DDR DIMMs. However, the same size, type and density memory modules
are necessary while using dual-channel DDR, or instability may happen. Please refer
to the following table for detailed dual-channel DDR. Other combination not listed
below will function as single-channel DDR.

2-6

Hardware Setup

Slot Memory Module Total Memory

DIMM 0

(Bank 0 & 1) S/D 128MB~1GB

DIMM 1

(Bank 2 & 3) S/D 128MB~1GB

Maximum System Memory Supported 128MB~2GB

S: Single Side D: Double Side

Installing DDRII Modules

1. The DDRII DIMM has only one notch on the center of module. The Module will
only fit in the right orientation.

2. Insert the DIMM memory module vertically into the DIMM slot. Then push it in
until the golden finger on the memory module is deeply inserted in the socket.

Important

You can barely see the golden finger if the module is properly inserted in the
socket.

3. The plastic clip at each side of the DIMM slot will automatically close.

Volt

Notch

2-7

MS-9641 Mainboard

Power Supply

ATX 24-Pin Power Connector: ATX1

This connector allows you to connect an ATX 24-pin power supply.
To connect the ATX 24-pin power supply, make sure the plug of the
power supply is inserted in the proper orientation and the pins are
aligned. Then push down the power supply firmly into the connector.

You may use the 20-pin ATX power supply as you like. If you’d like
to use the 20-pin ATX power supply, please plug your power sup­ply along with pin 1 & pin 13 (refer to the image at the right hand).
There is also a foolproof design on pin 11, 12, 23 & 24 to avoid
wrong installation.

Pin Definition

PIN SIGNAL

1 +3.3V
2 +3.3V

ATX1

24

12

13

1

3 GND
4 +5V
5 GND
6 +5V
7 GND
8 PWR OK
9 5VSB
10 +12V
11 +12V
12 NC

pin 13

pin 12

PIN SIGNAL

13 +3.3V
14 -12V
15 GND
16 PS-ON#
17 GND
18 GND
19 GND
20 Res
21 +5V
22 +5V
23 +5V
24 GND

ATX 12V Power Connector: JPW0

This 12V power connector is used to provide power to the CPU.

JPW1 Pin Definition

3
1

4

2

JPW0

PIN SIGNAL

1 GND
2 GND
3 12V
4 12V

Important

1. Maker sure that all the connectors are connected to proper ATX power sup­plies to ensure stable operation of the mainboard.

2. Power supply of 350 watts (and above) is highly recommended for system
stability.

3. ATX 12V power connection should be greater than 18A.

2-8

Hardware Setup

Important Notification about Power Issue

NForce chipset is very sensitive to ESD (Electrostatic Discharge), therefore this
issue mostly happens while the users intensively swap memory modules under S5
(power-off) states, and the power code is plugged while installing modules. Due to
several pins are very sensitive to ESD, so this kind of memory-replacement actions
might cause system chipset unable to boot. Please follow the following solution to
avoid this situation.

Unplug the AC power cable or unplug the power connectors before the 1st installa­tion or during system upgrade procedure.

Unplug the AC power cable

Unplug the power connector

Unplug the power connector

Important

Mainboard photos shown in this section are for demonstration only. The
appearance of your mainboard may vary depending on the model you purchase.

2-9

MS-9641 Mainboard

Back Panel I/O

Back Panel

Relay OFF

WAN

LAN

WAN

LAN

or

WAN

Relay ON

Serial Port Connector
The serial port is a 16550A high speed communications port that sends/ receives 16
bytes FIFOs. You can attach a serial mouse or other serial devices directly to the
connector.

VGA Connector
The DB15-pin female connector is provided for VGA monitors.

USB Connectors
The OHCI (Open Host Controller Interface) Universal Serial Bus root is for attaching
USB devices such as keyboard, mouse, or other USB-compatible devices.

LAN

WAN

LAN

2-10

Hardware Setup

LAN (RJ-45) Jack
The standard RJ-45 jack is for connection to single Local Area Network (LAN). You
can connect a network cable to it.

Link IndicatorActivity Indicator

LED Color LED State Condition

Off LAN link is not established.

Left Orange On (steady state) LAN link is established.

On (brighter & pulsing)The computer is communicating with another computer on the LAN.

Green Off 10 Mbit/sec data rate is selected.

Right On 100 Mbit/sec data rate is selected.

Orange On 1000 Mbit/sec data rate is selected.

2-11

MS-9641 Mainboard

Connectors

Hard Disk Connector: IDEB0

The mainboard provides a one-channel Ultra ATA 100 bus Master IDE controller that
supports PIO mode 0~4, Bus Master, and Ultra DMA 66/100 function. You can con­nect hard disk drives, CD-ROM drives and other IDE devices.

IDEB0

IDE VDMA Controller RAID ATAPI

1 66/100 Intel ICH7R N/A Yes

IDEB0 (Primary IDE Connector)
IDE1 can connect a Master and a Slave drive. You must configure the second
hard drive to Slave mode by setting the jumper accordingly.

IDE1 Definition

Important

If you install two hard disks on cable, you must configure the second drive to
Slave mode by setting its jumper. Refer to the hard disk documentation
supplied by hard disk vendors for jumper setting instructions.

Compact Flash Card Slot: CF0

This is the slot for Compact Flash (CF) Card.

CF0

2-12

Hardware Setup

Serial ATAII Connectors: SATA1~SATA4

SATA1~SATA4 are high-speed Serial ATA interface ports. Each supports serial ATA
data rates of 300MB/s. Both connectors are fully compliant with Serial ATA 2.0
specifications. Each Serial ATA connector can connect to 1 hard disk device.

SATA4

7 1

SATA2

SATA3

7

SATA1

Serial ATAII cable

Connect to SATA1/2/3/4

1

SATA1~ SATA4 Pin Definition

PIN SIGNAL PIN SIGNAL

1 GND 2 RXN
3 RXP 4 GND
5 TXN 6 TXP

7 GND

Take out the dust cover
and connect to the hard
disk devices

Important

Please do not fold the Serial ATA cable into 90-degree angle. Otherwise,
data loss may occur during transmission.

2-13

MS-9641 Mainboard

Fan Power Connectors: CPUFAN0, SYSFAN1, AUXFAN0

The fan power connectors support system cooling fan with +12V. When connecting
the wire to the connectors, always take note that the red wire is the positive and
should be connected to the +12V, the black wire is Ground and should be connected
to GND. If the mainboard has a System Hardware Monitor chipset on-board, you must
use a specially designed fan with speed sensor to take advantage of the CPU fan
control.

NC

+12V

GND

CPUFAN0

NC

GND

+12V

SYSFAN1

NC

GND

+12V

AUXFAN0

Important

Please refer to the recommended CPU fans at Intel® official website or

consult the vendors for proper CPU cooling fan.

Front Panel Connectors: JFP1

The mainboard provides two front panel connectors for electrical connection to the
front panel switches and LEDs. The JFP1 is compliant with Intel® Front Panel I/O
Connectivity Design Guide.

JFP1

Reset

HDD

Switch

LED

-

+

-

+

9

10

Power
Switch

1
2

+

-

Power
LED

2-14

JFP1 Pin Definition

PIN SIGNAL DESCRIPTION

1 HD_LED + Hard disk LED pull-up
2 FP PWR/SLP MSG LED pull-up
3 HD_LED - Hard disk active LED
4 FP PWR/SLP MSG LED pull-up
5 RST_SW - Reset Switch low reference pull-down to GND
6 PWR_SW + Power Switch high reference pull-up
7 RST_SW + Reset Switch high reference pull-up
8 PWR_SW - Power Switch low reference pull-down to GND
9 RSVD_DNU Reserved. Do not use.

Hardware Setup

Front USB Connector: F_USB2

The mainboard provides one USB 2.0 pinheader (optional USB 2.0 bracket available)
that are compliant with Intel® I/O Connectivity Design Guide. USB 2.0 technology
increases data transfer rate up to a maximum throughput of 480Mbps, which is 40
times faster than USB 1.1, and is ideal for connecting high-speed USB interface
peripherals such as USB HDD, digital cameras, MP3 players, printers, mo-

dems and the like.

F_USB2

Connected to F_USB2

2
1

10

9

Pin Definition

PIN SIGNAL PIN SIGNAL

1 VCC 2 VCC
3 USB0- 4 USB1­5 USB0+ 6 USB1+
7 GND 8 GND
9 Key (no pin) 10 USBOC

USB 2.0 Bracket

(Optional)

Important

Note that the pins of VCC and GND must be connected correctly to avoid
possible damage.

2-15

MS-9641 Mainboard

FWH/LPC Debugging Pin Header: JLPC1

The pin header is for internal debugging only.

13

14

21

JLPC1

JLPC1 Pin Definition

PIN SIGNAL PIN SIGNAL

1 LCLK 2 Key (no pin)
3 LRST# 4 VCC3
5 LAD0 6 FID0_LRST
7 LAD1 8 VCC5
9 LAD2 10 Key (no pin)
11 LAD3 12 GND
13 LFRAME# 14 GND

Serial Port Connector: COM0

The mainboard provides one 9-pin header as serial port COM0. The port is a 16550A
high speed communication port that sends/receives 16 bytes FIFOs. You can attach
a serial mouse or other serial devices directly to it.

Pin Definition

PIN SIGNAL DESCRIPTION

COM0

2

1

9

1 DCD Data Carry Detect
2 SIN Serial In or Receive Data
3 SOUT Serial Out or Transmit Data
4 DTR Data Terminal Ready
5 GND Ground
6 DSR Data Set Ready
7 RTS Request To Send
8 CTS Clear To Send
9 RI Ring Indicate

Power Select: J5

2-16

Hardware Setup

TV-Out Connector: JTV0

The mainboard optionally provides a TV-Out connector for you to attach a TV-Out
bracket that integrates HDTV-out. The TV-Out bracket offers two types of TV-Out
connectors: S-Video and RCA Composite connectors. Select the appropriate one to
connect to the standard television or the HDTV (High-Definition TeleVision) and it will
be able to display PC’s information.

Connected to JTV0

1

5 4

3

2

JTV0

JTV0 Pin Definition

Pin Description Pin Description

1 GND 4 COMP
2 Y 5 GND
3 C

TV-Out Bracket (Optional)

TV-Out Connector

(RCA Composite)

TV-Out Connector

(S-Video)

Important

1.Please note that the TV-Out bracket can connect to one TV only. Users
have to choose either the RCA Composite or the S-Video to connect. Si­multaneous connection (of this bracket) to two TVs is prohibited and may
lead to the malfunction of the TVs.

2.Please refer to Appendix: Using the TV-Out Function (HDTV-Out
Integrated) for details.

2-17

MS-9641 Mainboard

I2C Bus Connector: SM_BUS

The mainboard provides one I2C (also known as I2C) Bus connector for users to
connect System Management Bus (SMBus) interface.

LAN_LED

LAN_BY PASS LED: J3

2-18

Hardware Setup

Lan Bypass function is controlled by GPIO 38 and 39.
For relay 1(LAN1 & LAN2), it ¦s defined by GPIO38, pull high to enable and pull
down to disable.
For relay 2(LAN3 & LAN4), it ¦s defined by GPIO39, pull high to enable and pull
down to disable.

Sample code:
mov si, offset MENUITEMGROUP:Lan_ByPass_Item

call X_GetItem_Value ;get BIOS item (LAN Bypass) value

or al,al ;base on this item value to

enable or disable this function

jz @f ;1 is enable, 0 is disable

mov dx,GPIO_Port + 38h
in al,dx
newiodelay
and al,not 11000000b
or al,11000000b ;GPIO 38, 39 pull high to enable
out dx,al
jmp short Exit_Lan_ByPass
@@:
mov dx,GPIO_Port + 38h
in al,dx
newiodelay
and al,not 11000000b ;GPIO 38, 39 pull down to disable
out dx,al
Exit_Lan_ByPass:

2-19

MS-9641 Mainboard

By Pass Function:

LAN Bypass Normal
GPIO38 "High" "Low"
GPIO39 "High" "Low"

Lan Bypass function is controlled by GPIO 38 and 39.
For relay 1(LAN1 & LAN2), it’s defined by GPIO38, set “Low” to enable and set
“High” to disable.
For relay 2(LAN3 & LAN4), it’s defined by GPIO39, set “Low¨ to enable and set
“High¨ to disable.
Set “High¨ sample code :
mov dx,GPIO_Port + 38h ;GPIO_Port is 480h
in al,dx
newiodelay
or al,11000000b ;GPIO 38, 39 pull high to enable
out dx,al

Set “Low” sample code :
mov dx,GPIO_Port + 38h ;GPIO_Port is 480h
in al,dx
newiodelay
and al,not 11000000b ;GPIO 38, 39 pull down to disable
out dx,al

2-20

LAN5, LAN6 have no by pass function.

Watch Dog Function:

Support 1~255 second or minute selectable timeout interval.
Watch Code:

1) Enter configuration mode:

MOV DX,4EH
MOV AL,87H
OUT DX,AL
OUT DX,AL

2) Logical Device 8

MOV DX,4EH
MOV AL,07H
OUT DX,AL ;point to Logical Device Number Reg.
MOV DX,2FH
MOV AL,08H ;select Logical Device 8
OUT DX,AL

3) Enable WDTO# and set to KBRST#

MOV DX,2EH ;CR 30h: bit0 fill in 1
MOV AL,30H
OUT DX,AL
MOV DX,2FH
MOV AL,01H
OUT DX,AL
MOV DX,2EH ; CR F7h: bit4 fill in 0(clear event)
MOV AL,F7H
OUT DX,AL
MOV DX,2FH
IN DX,AL
AND AL,0F7H
OUT DX,AL
;CR F6h: bit0~7 fill in counter time
;CR F5h: bit1 fill in 1(Enable WDTO# & KBRST#)
Bit 3 (0: Second Mode,1:Minute Mode)

4) Exit configuration mode:

MOV DX,4EH
MOV AL,0AAH
OUT DX,,AL

Hardware Setup

2-21

MS-9641 Mainboard

2-22

Hardware Setup

Jumpers

Clear CMOS Jumper: CLR_CMOS0

There is a CMOS RAM onboard that has a power supply from external battery to keep
the data of system configuration. With the CMOS RAM, the system can automatically
boot OS every time it is turned on. If you want to clear the system configuration, set
the CLR_CMOS0 (Clear CMOS Jumper ) to clear data.

3

1

1

1

3

CLR_CMOS0

Keep Data

Clear Data

Important

You can clear CMOS by shorting 2-3 pin while the system is off. Then return
to 1-2 pin position. Avoid clearing the CMOS while the system is on; it will
damage the mainboard.

2-23

MS-9641 Mainboard

JCF_SEL & JCFV_SEL

1

JCF_SEL

1

JCFV_SEL

2-24

Slots

Golden Finger

TOP View

BOTTOM View

B94

A94

Hardware Setup

B1

A1

2-25

MS-9641 Mainboard

2-26

Hardware Setup

PCI (Peripheral Component Interconnect) Slots

The PCI slots support LAN cards, SCSI cards, USB cards, and other add-on cards
that comply with PCI specifications. At 32 bits and 33 MHz, it yields a throughput rate
of 133 MBps.

32-bit PCI Slot

Important

When adding or removing expansion cards, make sure that you unplug the
power supply first. Meanwhile, read the documentation for the expansion card
to configure any necessary hardware or software settings for the expansion
card, such as jumpers, switches or BIOS configuration.

2-27