Biostar U8068 User Manual

FCC Information and Copyright

This equipment has been tested and found to comply with the
limits of 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. There is no guarantee that interference will not
occur in a particu la r installation.

The vendor makes no representat ions or warranties with respect
to the contents here of and specially disclaims any implied

warranties

the vendor reserves the right to revise this publication and to
make changes to the contents here of without obligation to notify
any party beforehand.
Duplication of this publication, in part or in whole, is not allowed
without first obtaining the vendor’s appr oval in writing.

The content of this user’s manual is subject to be changed without
notice and we will not be responsible for any mistakes found in
this user’s manual. All the brand and product names are
trademarks of their respective companies.

of merchantability or fitness for any purpose. Further

Table of Contents

Notice .............................................................................................1

Mainboard Features...............................................................2

1. Features Introduction.........................................................................2

1-1. Hardware.........................................................................................................2

1-2. BIOS & Software.........................................................................................7

1-3. Package Contents.......................................................................................7

2. Mainboard Configuration...................................................................8

2-1. Layout of U8068.......................................................................................... 8

2-2. Component Index.......................................................................................9

3. CPU Configuration ............................................................................. 10

3-1. CPU Socket 478 Conf igurat ion Steps :...........................................10

3-2. CPU Fan Header: J CFAN1.....................................................................12

3-3. System Fan Header : JSFAN1.............................................................12

4. Jumpers, Headers & Connectors.................................................. 13

4-1. Front Pane l Connecto r: JPANE L1......................................................14

4-2. ATX 20-pin Power Co nnector : JATXPWR1...................................16

4-3. Hard Disk Connector s: IDE1/I DE2..................................................16

4-4. Floppy Disk Connector: FDD1............................................................17

4-5. Wake On LAN Header: JWOL1...........................................................17

4-6. Clear CMOS Jumper: JCMO S1...........................................................17

4-7. Front USB Header : JUSB3....................................................................18

4-8. Front USB Header : JUSB4....................................................................18

4-9. 5V / 5VSB Select ion fo r KB: JKBV1.................................................18

i

Table of Contents

4-10. ATX 12V Power Connec tor: JATXPWR2......................................19

4-11. 5V / 5VSB Select ion for USB: J USBV3........................................19

4-12. 5V / 5VSB Select ion for USB: J USBV4........................................19

5. RAM Module Configuration............................................................. 20

5-1. DDR SDRAM................................................................................................20

5-2 SDRAM.............................................................................................................21

5-3. How to install DDR/SDRAM DI MM Module..................................22

6. Peripheral Port Features ................................................................. 24

6-1. PS/2 Mouse / Ke yboa rd Connecto r: JKB MS1.............................24

6-2. USB & LAN Port Connecto rs: JUSBLAN1......................................25

6-3. Serial and Parallel Interface Ports....................................................27

6-4. Game (Joystick/MI DI) Port Con nector: JAUD_G AME............30

6-5. Audio Port Connector s: JSPKR1/JLI N1/JMIC1...........................30

6-6. Audio Subsystem......................................................................................31

ii

Chapter 1 Motherboard Description

Notice

Introduction of system

This mainboard is designed to ta ke advantage of the lates t industry
technology to provide you with the ultimate solution in data
processing. In th e tr a d ition of its predecessors, this ma inboard
continues a commitment to reliability a nd performance and striv es
for full compliance and compatibility with industry s of tware and
hardware standards.

U8068 Features:

1.Contains on board I/O fac ilities that inclu de a s er ial por t, a VGA por t,
a parallel port, a PS/2 mouse port, a PS/2 keyboard port, audio
ports, USB ports and a game port.

2.Contains on board ID E facilities for IDE de vices such as hard disk s
and CD-ROM Drives.

3.Supports the Intel Pentium ® 4 processor, a leading edge processor.
Complies with PC Micro-ATX form factor specifications.

4.Supports popular op erating system s such as W indows NT, Windows
2000, Windows ME, Windows XP, Novell, LINUX and SCO UNIX.

1-1

Chapter 1 Motherboard Description

Mainboard Features

1. Features Introduction

1-1. Hardware

CPU:

1.Provides Socket-478.

2.Supports the Intel Pentium ® 4 processor providing the new generation power
for high-end workstations and servers.

Speed:

1.Runing at 400 MHz Front Side Bus frequency.

2.Supports up to 2.4 GHz CPU core speeds.

3.The 33MHz 32 bit PCI 2.2 compliant.

4.The 66MHz AGP 2.0 compliant interface supports 1x, 2x and 4x data transfer

mode.

Chipset:

Chipset – VIA VT8751 (P4M266)/ VT8235.

Super I/O

Chipset – ITE 8705

DRAM Memory:

1.Supports 200MHz, 266MHz DDR SDRAM or PC100, PC133 SDRAM.

2.Supports 64Mb, 128Mb, 256Mb and 512Mb technologies for x8 and 16

devices.

3.The largest memory capacity is 2 GB.

1-2

Chapter 1 Motherboard Description

Shadow RAM:

Motherboard is equipped with a memory controller providing shadow RAM and
support for ROM BIOS.

Green Functionality:

1.Supports Award BIOS ™ power management functionality.

2.Has a power down timer from 1 to 15 minutes.

BUS Slots:

1.Contains 1 AGP slot.

2.Contains 1 CNR slot.

3. Contains 3 32-bit PCI bus slots

Fast EtherNet 10/ 100 1-Port PHY/ Transceiver:

1.Dual Speed – 100/ 10 Mbps.

2.Half and Full Duplex.

3.MII Interface to Ethernet Controller.

4.Optional Repeater Interface.

5.Auto Negotiation: 10/ 100, Full/ Half Duplex.

6.Meet All Applicable IEEE 802.3, 10Base-Tx Standards.

7.Baseline Wander Correction.

Flash Memory:

1.Supports flash memory functionality.

2.Supports ESCD functionality.

Built in VGA:

1. High Resolution CRT RGB Interface

1.250 MHz RAMDAC on chip with Gamma Correction.

2.Horizontal / Vertical Sync outputs compliant with Monitor Power

1-3

Chapter 1 Motherboard Description

Management protocols.

3.I2C Serial Bus for DDC Monitor Communications.

2. 2D Hardware Acceleration Features

1. ROP3 Ternary Raster Operation BitBLTs.

2. 8, 16 and 32 bpp mode acceleration.

3. Integrated Savage4 2D/ 3D Graphics Controller and Video

Accelerator

1. Optimized Shared Memory Architecture (SMA).

2. 16 / 32 MB frame buffer using system memory.

3. Floating-point triangle setup engine.

4. Single circle 128-bit 3D architecture.

5. 8M triangles /second setup engine.

6. 140M pixels second trilinear fill rate.

7. Full internal AGP 4x performance.

8. Microsoft Direct X texture compression.

9. Next generation, 128-bit 2D graphics engine.

10. High quality DVD video playback.

11. 2D / 3D resolutions up to 1920x1440.

4. 3D Rendering Features

1. Single-pass multiple textures.

2. Anisotropic filtering.

3. 8-bit stencil buffer.

4. 32-bit true color rendering.

5. Specular lighting and diffuse shading.

6. Alpha blending modes.

7. Massive 2K x 2K textures.

8. MPEG-2 video textures.

9. Vertex and table fog.

10. 16 or 24-bit Z-buffering.

11. Reflection mapping, texture morphing, shadows, procedural textures and

atmospheric effects.

Built in IDE Facilities:

1.Supports four IDE hard disk drives.

2.Supports PIO Mode 4, Master Mode, and high performance hard disk drives.

3.Supports disk transfer rates up to 133 MB/second.

4.Supports Ultra DMA 33, Ultra DMA 66, Ultra D MA 100, Ultra DMA 133 Bus

1-4

Chapter 1 Motherboard Description

Master Modes.

5.Supports IDE interface with CD-ROM.

6.Supports high capacity hard disk drives.

7.Supports LBA mode.

1-5

Chapter 1 Motherboard Description

AC’97 Sound Codec Onboard:

1.AC-LINK protocol comfliance.

2.Compliant with AC’97 specification.

3.18-bit full duplex stereo ADC, DACs.

4.SNR>95 Bb throughmixer and DAC.

I/O facilities:

1.One multi-mode Parallel Port capable of supporting the following

specifications:
Standard & Bidirection Parallel Port.
Enhanced Parallel Port (EPP).
Extended Capabilities Port (ECP).
Normal

2.Supports one serial port, 16550 UART.

3.Supports Infrared Data Transmission using IrDA.

4.Supports PS/2 mouse and PS/2 keyboard.

5.Supports 360KB, 720KB, 1.2MB, 1.44MB, and 2.88MB floppy disk drives.

Universal Serial Bus:

Supports two back panel Universal Serial Bus (USB2.0) Ports and four front

panel Universal Serial Bus (USB2.0) Ports.

Hardware Monitor Function:

1.Monitors CPU Fan Speed.

2.Monitors System Voltage.

3.Monitors System Speed.

Dimensions (MATX form-factor):

24.5cm x 24.5cm (WxL)

1-6

Chapter 1 Motherboard Description

1-2. BIOS & Software

1.Award legal BIOS.

2.Supports APM1.2.

3.Supports USB Function.

4.Supports ACPI.

Operating System:

Offers the highest performance for MS-DOS, Windows NT, Windows 2000,
Windows ME,

Windows XP,

Novell, LINUX, and SCO UNIX etc.

1-3. Package Contents

1.HDD Cable.

2.FDD Cable.

3.Flash Memory Writer for BIOS Update.

4.USB Cable (Optional).

5.Rear I/O Panel for MATX Case (Optional).

6.Fully Setup Driver CD.

1-7

Chapter 1 Motherboard Description

CPU

2. Mainboard Configuration

2-1. Layout of U8068

JKBMS1

K/B
&
Mouse

JUSBLAN

USB & LAN

JCOM1

COM1

VGA1

Socket 478

JPRNT1

Parallel Port

CPU1

JATXPWR1

JVGA1

1

JCDIN1

Speaker

Out

Line

In

MIC

In

Codec

Game Port

JATXPWR2

BIOS

LAN

CNR SLOT

PCI SLOT

PCI SLOT

PCI SLOT

CNR1

P4M266
(VT8751)

AGP SLOT

PCI1

PCI2

PCI3

1-8

JUSBV3

11

129101

JUSB3 JUSB4

JUSBV4

2

10
9

ITE I/O

VT8235

JCMOS1

JWOL1

JPANEL1

2
1

PRIMARY IDE CONN.

IDE1 IDE2

BAT1

1

SECONDARY IDE CONN.

FDD1

FLOPPY DISK CONN.

1

24
23

Chapter 1 Motherboard Description

CPU

2-2. Component Index

Socket 478

P4M266
(VT8751)

LAN

Codec

BIOS

ITE I/O

BAT1

VT8235

1-9

Chapter 1 Motherboard Description

3. CPU Configuration

3-1. CPU Socket 478 Configuration Steps:

CPU Fan

CPU

1. Pull the lever sideways away from the socket then raise the
lever up to a 90-degree angle.

2. Locate Pin A in the socket and look for the white dot or cut
edge in the CPU. Match Pin A with the white dot/cut edge
then insert the CPU.

3. Press the lever down. Then Put the fan on the CPU and buckle
it and put the fan’s power port into the JCFAN1, then to
complete the installation.

1-10

Chapter 1 Motherboard Description

CPU Configuration Layout

Socket 478

CPU

P4M266
(VT8751)

LAN

BAT1

Codec

VT8235

BIOS

1-11

ITE I/O

JSFAN1

Chapter 1 Motherboard Description

3-2. CPU Fan Header: JCFAN1

3-3. System Fan Header: JSFAN1

Pin No. Assignment

1 Ground
2 +12V
3 Sense

Pin No. Assignment

1
2 +12V
3

Ground

Sense

1-12

Chapter 1 Motherboard Description

4. Jumpers, Headers & Connectors

1

JKBV1

Socket 478

CPU

JATXPWR1

JATXPWR2

1

JUSBV3

129

JUSB3

P4M266
(VT8751)

LAN

Codec

BAT1

VT8235

BIOS

10

ITE I/O

IDE Connectors (IDE1-2)

1

JUSBV4
JCMOS1

1

FDD1

JWOL1

1

JPANEL1
JUSB4

10

129

1-13

Chapter 1 Motherboard Description

4-1. Front Panel Connector: JPANEL1

Pin Assignment Function Pin Assignment Function
No.

No.

1
3
5
7

9
11
13
15
17
19
21
23

+5V 2 Sleep Control Sleep

NA Speaker 4 Ground Button
NA Connector

6

NA

Speaker 8 Power LED (+)

HDD LED (+) Hard Drive

HDD LED (-) LED

Ground Reset

Reset Control Button

NA
NA IrDA

VCC5 Connector

IRTX

Power LED (+) POWER

10

Power LED (-) LED

12

Power Button Power-on

14
16
18
20
22
24

Ground Button

KEY
KEY IrDA

Ground Connector

IRRX

SPK (Speaker Connector)

An offboard speaker can be installed on the motherboard as a
manufacturing option. An offboard speaker can be connected to
the motherboard at the front panel connector. The speaker
(onboard or offboard) provides error beep code information during
the Power On Self-Test when the computer cannot use the video
interface. The speaker is not connected to the audio subsystem
and does not receive output from the audio subsystem.

RST (Reset Button)

NA

This connector can be attached to a mo mentary SP ST swi tch. T his
switch is usually open and when closed will cause the
motherboard to reset and ru n the POST (Power On Self Test).

1-14

Chapter 1 Motherboard Description

POW-LED (Power LED Connector)

This connector can be attached to an LED on the front panel of a
computer case. The LED will illuminate while the computer is
powered on.

HLED (Hard Drive LED Connector)

This connector can be attached to an LED on the front panel of a
computer case. The LED will flicker during disk activity. This disk
activity only applies to those IDE drives directly attached to the
system board.

IR (Infrared Connector)

This connector is used to attach to an infrared sensing device.
After the IrDA interface is configured, connectionless data transfer
to and from portable devices such as laptops, PDAs is possible.

SLP (Sleep/Green Button)

This connector is used to co nserve energy by powering down t he
monitor and the hard disk when not in use. To configure this
option, you need to connect a button from the front panel to this
connector. Depressing the button will power down the monitor
and hard drives until the system is invoked by any keyboard
activity, mouse activity, modem activity or when the sleep button
is depressed again. APM (Advanced Power Management) must be
enabled in the system BIOS and the APM driver must be loaded.

ON/OFF (Power Button)

This connector can be attached to a front panel powe r switch. The
switch must pull th e Power Button pin to ground for at least 50 ms
to signal the power supply to switch on or off. (The time required
is due to internal debounce circuitry on the system board). At
least two seconds must pass before the power supply will
recognize another on/off signal.

1-15

Chapter 1 Motherboard Description

4-2. ATX 20-pin Power Connector:

JATXPWR1

PIN Assignment PIN Assignment

1 +3.3V 11 +3.3V
2 +3.3V 12 -12V
3 Ground 13 Ground
4 +5V 14 PS_ON
5 Ground 15 Ground
6 +5V 16 Ground
7 Ground 17 Ground
8 PW_OK 18 -5V
9 +5V_SB 19 +5V

10 +12V 20 +5V

4-3. Hard Disk Connectors: IDE1/IDE2

This mainboard has a 32-bit Enhanced PCI IDE Controller that
provides PIO Mode 0~4, Bus Master, and Ultra DMA / 33, Ultra
DMA / 66,Ultra DMA / 100 functionality. It has two HDD
connectors IDE1 (primary) and IDE2 (secondary).

• IDE1 (Primary IDE Connector)

The first hard drive should always be connected to IDE1. IDE1
can connect a Master and a Slave drive. You must configure the
second hard drive on IDE1 to Slave mode by setting the jumper
accordingly.

• IDE2 (Secondary IDE Connector)

The IDE2 controller can also support a Master and a Slave drive.
The configuration is similar to IDE1. The second drive on this
controller must be set to slave mode.

1-16

Chapter 1 Motherboard Description

4-4. Floppy Disk Connector: FDD1

The motherboard provides a standard fl oppy disk connector (FDC)
that supports 360K, 720K, 1.2M, 1.44M and 2.88M floppy disk
types. This connector supports the provided floppy drive ribbon
cables.

4-5. Wake On LAN Header: JWOL1

Pin No. Assignment

1
2 Ground

3

+5V SB

Wake up

4-6. Clear CMOS Jumper: JCMOS1

JCMOS1 Assignment

1 3

1-2 Closed

1 3

2-3 Closed

Normal Operation (default)

Clear CMOS Data

※ Clear CMOS Procedures:

1. Remove AC power line.

2. Make JCMOS1 (2-3) clo sed.

The following procedures are fo r resetting
the BIOS password. It is important to
follow these instructions closely.

1-17

Chapter 1 Motherboard Description

3. Wait for five seconds.

4. Make JCMOS1 (1-2) clo sed.

5. Let AC power on.

6. Reset your desired password or clear the CMOS data.

4-7. Front USB Header: JUSB3

(JUSB3)

Pin Assignment Pin Assignment

1 +5V(fused) 2 +5V(fused)
3 USBP2- 4 USBP3-
5 USBP2+ 6 USBP3+
7 Ground 8 Ground
9 KEY 10 NC

4-8. Front USB Header: JUSB4

(JUSB4)

Pin Assignment Pin Assignment

1 +5V(fused) 2 +5V(fused)
3 USBP2- 4 USBP3-
5 USBP2+ 6 USBP3+
7 Ground 8 Ground
9 KEY 10 NC

4-9. 5V / 5VSB Selection for KB: JKBV1

JKBV1 Assignment

1 3

1-2 Closed

1 3

2-3 Closed

5V

5V_SB

1-18

Chapter 1 Motherboard Description

4-10. ATX 12V Power Connector: JATXPWR2

PIN Assignment PIN Assignment

1 +12V 3 Ground
2 +12V 4 Ground

4-11. 5V / 5VSB Selection for USB: JUSBV3

JUSBV3 Assignment

1 3

1-2 Closed

1 3

2-3 Closed

5V

5V_SB

4-12. 5V / 5VSB Selection for USB: JUSBV4

JUSBV4 Assignment

1 3

1-2 Closed

1 3

2-3 Closed

5V

5V_SB

1-19

Chapter 1 Motherboard Description

5. RAM Module Configuration

5-1. DDR SDRAM

DRAM Access Time: 2.5V Unbuffered DDR SDRAM

DRAM Type: 128MB/ 256MB/ 512MB/ 1GB DIMM

Total Memory Size with unbuffer

(Only for reference)

DIMM Socket

Location

DDR 1 64MB/128MB/256MB/512MB/1GB

DDR 2 64MB/128MB/256MB/512MB/1GB

PC1600/ PC2100 Type required.

Module (184 pin)

DIMMs

DDR Module Total Memory

Size (MB)

*1

*1

Max is

2GB

1-20

Chapter 1 Motherboard Description

5-2 SDRAM

DRAM Access Time: 3.3V Unbuffered SDRAM PC100/

DRAM Type: 128MB/ 256MB/ 512MB DIMM Module

PC133 Type required.

(168 pin)

Total Memory Size with unbuffer

DIMMs

(Only for reference)

!When you use DDR SDRAM, the memory power will
automatically set to 2.5V.

!When you use SDRAM, the memory power will
automatically set to 3.3V.

DIMM Socket

Location

SDR 1 64MB/128MB/256MB/512MB/1GB

SDR 2 64MB/128MB/256MB/512MB/1GB

SDR Module Total Memory

*1

*1

Size (MB)

Max is

2GB

!

For the above settings, you can only use one kind of memory
on this motherboard. It is forbidden to insert both kind of
memory simultaneously. You must insert only DDR or
SDRAM.

1-21

Mainboard Features

5-3. How to install DDR/SDRAM DIMM

Module

DDR SDRAM:

Single Sided DIMM

Double Sided DIMM

1. The DDR DIMM socket has a

“ Plastic Safety Tab”, and the

DDR DIMM memory module has

an Asymmetrical notch”, so the

DDR DIMM memory module can

only fit into the slot in one

direction

.

2. Push the tabs out. Insert the

DDR DIMM memory modules into

the socket at a 90-degree angle,

then push down vertically so that

it will fit into the place.

3. The Mounting Holes and plastic tabs should fit over the edge and

hold the DDR DIMM memory modules in place.

22

Mainboard Features

SDRAM:

1. The SDRAM DIMM socket has

a “ Plastic Safety Tab”, and the

SDRAM DIMM memory module

has an Asymmetrical notch”, so

the SDRAM DIMM memory

module can only fit into the slot

in one direction.

2. Push the tabs out. Insert the

SDRAM DIMM memory modules

into the socket at a 90-degree

angle, then push down vertically

so that it will fit into the place.

3. The Mounting Holes and plastic tabs should fit over the edge and
hold the SDRAM DIMM memory modules in place.

23

Mainboard Features

6. Peripheral Port Features

JKBMS1

PS/2
Mouse

PS/2
Keyboard

JUSBLAN1

LAN (Optional)

USB

COM1

JPRNT1

Parallel

VGA1

JVGA1JCOM1

JAUD_GAME

Game P o rt

Speaker

Out

Line In

Mic
In

JSPKR1 JLIN1 JMIC1

6-1. PS/2 Mouse / Keyboard Connector:

JKBMS1

The motherboard provides a standard PS/2 mouse / Keyboard
mini DIN connecto r for attaching a PS/2 mouse. You can plug a
PS/2 mouse / Keyboard directly into this connector. The co nnecto r
location and pin definition are shown below:

PS/2 Mouse / Keyboard Connectors

Pin Assignment

1 Data
2 No connect
3 Ground
4 +5 V (fused)
5 Clock
6 No connect

24

Mainboard Features

6-2. USB & LAN Port Connectors: JUSBLAN1

6-2-1. USB Connectors:

USB Connector (the below one)

Pin Assignment

1 +5 V (fused)
2 USBP1­3 USBP1+
4 Ground

USB Connector (the above one)

Pin Assignment

5 +5 V (fused)
6 USBP2­7 USBP2+
8 Ground

25

Mainboard Features

6-2-2. LAN Port Connector (Optional)

This connector allows you to connect to the Internet through a
Local Area Network (LAN). You can set up the connection by
entering account information provided by your ISP.

LAN Port Connector

Pin Assignment

9 VCC3
10 TD+
11 TD­12 RD+
13 RD­14 NC

26

Mainboard Features

6-3. Serial and Parallel Interface Ports

This system comes equipped with one serial port and one parallel
port. Both types of interface ports will be explained in this
chapter.

6-3-1. The Serial Interface: JCOM1

The serial interface port is sometimes referred to as an RS-232
port or an asynchronous communication port. Mice, printers,
modems and other peripheral devices can be connected to a serial
port. The serial port can also be used to connect your computer
with another computer system.

Connectivity

The serial ports can be used in many ways, and it may be
necessary to become familiar with the pinout diagram. The
following chart gives you the function of each pin on the 9-pin
connector and some of the 25-pin connector. This information can
be used when configuring certain software programs to work with
the serial ports.

Signal Name DB9 PIN DB25 PIN

DCD Data Carrier Detect 1 8

RX Receive Data 2 3

TX Transmit Data 3 2

DTR Data Terminal Ready 4 20
GND Signal Ground 5 7
DSR Data Set Ready 6 6

RTS Requ es t to Send 7 4

CTS Clear to Send 8 5

RI Ring Indicator 9 22

27

Mainboard Features

6-3-2Video Graphics Adapter Port: JVGA1

This motherboard has built in video facilities. Your monitor will
attach directly to JVG A 1 connector on the motherboard.

5

1

1115

JVGA1

Pin
No.

1 Red 2 Green
3 Blue 4 NC
5 Ground 6 Ground
7 Ground 8 Ground

9 +5V 10 Ground
11 NC 12 DDC/Data
13 HSYNC 14 VSYNC
15 DDC/CLK

Assignment

28

Pin

No.

Assignment

Mainboard Features

6-3-3.

Unlike the serial ports, parallel interface port has been
standardized and should not present any difficulty interfacing
peripherals to your system. Sometimes called centronics port , the
parallel port is almost exclusively used with printers. The parallel
port on your sys te m has a 25 -p in, DB2 5 c onne cto r. The p ino ut fo r
the parallel port are shown in the table below.

Parallel Interface Port: JPRNT1

Pin Signal

1 -Strobe
2 Data 0
3 Data 1
4 Data 2
5 Data 3
6 Data 4
7 Data 5
8 Data 6

9 Data 7
10 -Ack
11 Busy

12 Paper Empty
13 +Select
14 -Auto FDXT
15 -Error
16 -Init
17 -SLCTN
18 Ground
19 Ground
20 Ground
21 Ground
22 Ground
23 Ground
24 Ground
25 Ground

29

Mainboard Features

6-4. Game (Joystick/MIDI) Port Connector:

JAUD_GAME

This connector allows you to co nnect a joystick or game pad for
playing computer games. Also, you may play or edit professional
music by connecting MIDI devices.

Game/Joystick/MIDI

6-5. Audio Port Connectors:

JSPKR1/JLIN1/JMIC1

Speaker Out

1. Speaker Out is used to connect speakers or headphones for
audio output.

2. Line In can be connected to the external CD player, Tape
player or other audio devices for audio input.

3. Mic In is used to co nnect a microphone, whic h allows you to
input sounds and voices.

30

Line In

Mic In

Mainboard Features

CPU

6-6. Audio Subsystem

Codec

Socket 478

P4M266
(VT8751)

LAN

BAT1

VT8235

JCDIN1

1

BIOS

ITE I/O

31

Mainboard Features

6-6-1. CD-ROM Audio-In Header: JCDIN1

Pin No. Assignment

1 Left Channel Input
2 Ground
3
4

Ground

Right Channel Input

6-6-2. Front Panel Audio Header: JAUDIO1

Pin No. Assignment Pin No. Assignment

1
3 Mic Power 4 Audio Power
5 RT Line Out 6 RT Line Out
7
9

Mic In

Reserved

LFT Line Out

2

8

10

Ground

LFT Line Out

32

Mainboard Features

10/08/2002

33