Biostar U8638 User manual

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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 particular installation.
The vendor makes no representations or warranties with respect
to the contents here of and specially disclaims any implied
warranties of merchantability or fitness for any purpose. Further
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 approval 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.

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Notice 
Mainboard Features  
1. Features Introduction 
1-1. Hardware 
1-2. BIOS & Software
1-3. Package Contents
2. Mainboard Configuration 
2-1. Layout of U8638 
2-2. Component Index 
3. CPU Configuration 
3-1. CPU Socket 478 Configuration Steps:
3-2. CPU Fan Header: JCFAN1 
3-3. System Fan Header: JSFAN1 (Optional)
3-4. North Bridge Chipset Fan Header: JNFAN1 (Optional)
4. Jumpers, Headers & Connectors  
4-1. CNR Code Primary/Secondary Selection: JCODECSEL
4-2. Front Panel Connector: JPANEL1 
4-3. ATX 20-pin Power Connector: JATXPWR1 
4-4. ATX 12V Power Connector: JATXPWR2
4-5. AUX Power Connector: JAUXPWR1(Optional)
4-6. Hard Disk Connectors: IDE1/IDE2
4-7. Floppy Disk Connector: FDD1
4-8. 5V/5VSB Selection for KB: JKBV1(Optional) 

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4-9. 5V/5VSB Selection for USB: JUSBV1 (Optional)
4-10. Wake On LAN Header: JWOL1 
4-11. Front USB Headers: JUSB2, JUSB3 
4-12. Clear CMOS Jumper: JCMOS1
5. RAM Module Configuration  
5-1. DIMM Features
5-2. DIMM Module Configuration 
6. Peripheral Port Features 
6-1. PS/2 Mouse / Keyboard Connector: JKBMS1
6-2. USB & LAN Port Connectors: JUSBLAN1
6-2-1. USB Connectors  
6-2-2. LAN Port Connector: (Optional)  
6-3. Serial and Parallel Interface Ports
6-3-1. The Serial Interface: JCOM1  
6-3-2. Monitor Connector: JVGA1 
6-3-3. Parallel Interface Port: JPRNT1  
6-4. Game (Joystick/MIDI) Port Connector: JAUD_GAME
6-5. Audio Port Connectors: JAUD_GAME
6-6. Audio Subsystem
6-6-1. CD-ROM Audio-In Header: JCDIN1 
6-6-2. CD-ROM Audio-In Header: JCDIN2(Optional) 
6-6-3. Front Panel Audio Header: JAUDIO1 
6-6-4. Telephony Audio Header: JTAD1  



Notice
Introduction of system
This mainboard is designed to take advantage of the latest industry
technology to provide you with the ultimate solution in data processing.
In the tradition of its predecessors, this mainboard continues a
commitment to reliability and performance and strives for full compliance
and compatibility with industry software and hardware standards.





U8638 Features:
           
          !  
"#$%&'(

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),-.)+

/0$$
123

0  $ !  41 565741
&24188841.*413%&"3-9:
"&3




Mainboard Features
1. Features Introduction
1-1. Hardware

1.Provides Socket-478.
2.Supports the Intel Pentium ® processor providing the new generation power for
high-end workstations and servers.

1.Runing at 400 MHz Front Side Bus frequency.
2.Supports up to 2.0 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.

1.Chipset – VIA VT8751 (P4M266), VT8233/A.
2.Chipset – Winbond W83697HF.
3.Chipset – LAN Chip Realtek RTL 8100/B (Optional).

1.Supports 100MHz or 133MHz SDR SDRAM devices.
2.Supports 64Mb, 128Mb, 256Mb and 512Mb technologies for x8 and 16 devices.
3.Max of 2 Double-Sided DIMMs (4 rows populated) with PC100 / PC133 (with or
without ECC).
4.The largest memory capacity is 2 GB.




1.Integrated Fast Ethernet MAC, Physical chip and transceiver in one chip.
2.10 Mb / s and 100 Mb / s operation.
3.PCI local bus single-chip Fast Ethernet controller.
Compliant to PCI Revision 2.2
Supports ACPI, PCI power management
4.Compliant to PC99 standard.
5.Supports Wake-On-LAN function and remote wake-up (Magic Packet*, LinkChg
and Microsoft ®wake-up frame)
6.Uses 93C46 (64*16-bit EEPROM) to store resource configuration, ID parameter,
and VPD data.
7.Supports LED pins for various network activity indications.
8.Half/ Full duplex capability.

Motherboard is equipped with a memory controller providing shadow RAM and
support for ROM BIOS.

 !"
1.Supports Award BIOS ™ power management functionality.
2.Has a power down timer from 1 to 15 minutes.
3.Wakes from power saving sleep mode with any keyboard or mouse activity.

#
1.Contains 1 AGP slot.
2.Contains 1 CNR slot.
3.Contains 3 32-bit PCI bus slots


1.Supports flash memory functionality.
2.Supports ESCD functionality.




$% &'!(#)*"
1.250 MHz RAMDAC on chip with Gamma Correction.
2.Horizontal / Vertical Sync outputs compliant with Monitor Power Management
protocols.
3.I2C Serial Bus for DDC Monitor Communications.
+% +&"" !
1. ROP3 Ternary Raster Operation BitBLTs.
2. 8, 16 and 32 bpp mode acceleration.
,% )' -'. +/ , "   0
""
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.
.% ,' !
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.



#!)1 "
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 100 MB/second.
4.Supports Ultra DMA 33, Ultra DMA 66, Ultra DMA 100, Ultra DMA 133 (Optional)
Bus Master Modes.
5.Supports IDE interface with CD-ROM.
6.Supports high capacity hard disk drives.
7.Supports LBA mode.

234!"5
1.AC-LINK protocol comfliance.
2.Compliant with AC’97 2.2 specification.
3.18-bit full duplex stereo ADC, DACs.
4.SNR>90 dB throughmixer and DAC.
5.AC-3 playback required for PVD applications.

)/*"
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 two serial ports, 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.

& !"
1.Monitors CPU Fan Speed.
2.Monitors System Voltage.



-#!
1.Supports two back panel Universal Serial Bus Ports and four front panel
Universal Serial Bus Ports (optional).
2.Supports 48 MHz USB.


"(6*7*"
24.4cm x 24.4cm (WxL)
1-2. BIOS & Software
1.Phoenix legal BIOS.
2.Supports APM1.2.
3.Supports USB Function.
4.Supports ACPI.
'
Offers the highest performance for MS-DOS, Windows NT, Windows 2000,
Windows 95/98, Windows ME, Windows XP, LINUX RedHat 7.2, and SCO UNIX
etc.

1-3. Package Contents
1.HDD Cable.
2.FDD Cable.
3.Flash Memory Writer for BIOS Update.
4.USB2/USB3 Cable (Optional).
5.Rear I/O Panel for micro ATX Case (Optional).
6.Fully Setup Driver CD.



2. Mainboard Configuration

2-1. Layout of U8638














 




 








 

 














 












2-2. Component Index


CPU
PCI1
PCI2
PCI3
1
2
9
10
AGP SL OT
PCI SLOT
PCI SLOT
PCI SLOT
Socket 478
Realtek
RTL 8100
JPANEL1
1
2
23
24
BIOS
JUSB3
1
2
9
10
JUSB2
1
2
9
10
VT8751
VT8233
JTAD1
Winbond
W83697H F
JUSBV1
1
JKBV1
CNR1
CNR SLOT
FDD1
JCODECSEL
1
JWOL1
1
JSFAN1
1
1
5V / 5VSB selection for KB (JKBV1)
5V / 5VSB selection for USB (JUSBV1)
FLOP PY DISK C ONN.

 



BAT1


 
 
 
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3. CPU Configuration
3-1. CPU Socket 478 Configuration Steps:
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.
CPU Fan

CPU

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CPU Configuration Layout
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3-2. CPU Fan Header: JCFAN1
Pin No. Assignment
1 Ground
2 +12V
3 Sense

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3-3. System Fan Header: JSFAN1 (Optional)
Pin No. Assignment
1 Ground
2 +12V
3 Sense
3-4. North Bridge Chipset Fan Header: JNFAN1
(Optional)
Pin No. Assignment
1 Ground
2 +12V

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4. Jumpers, Headers & Connectors
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4-1. CNR Code Primary/Secondary Selection:
JCODECSEL
Pin No. Assignment
1-2 On-board Primary Codec
2-3 CNR Primary Codec

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4-2. Front Panel Connector: JPANEL1
Pin Assignment Function Pin Assignment Function
No. No.
1 5V 2 Sleep Control Sleep
3 NA Speaker 4 Ground Button
5 NA Connector 6 NA NA
7 Speaker 8 Power LED (+)
9 HDD LED (+) Hard Drive 10 Power LED (+) POWER
11 HDD LED (-) LED 12 Power LED (-) LED
13 Ground Reset 14 Power Button Power-on
15 Reset Control Button 16 Ground Button
17 NA 18 KEY
19 NA IrDA 20 KEY IrDA
21 5V Connector 22 Ground Connector
23 IRTX 24 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)
This connector can be attached to a momentary SPST switch. This
switch is usually open and when closed will cause the motherboard to
reset and run the POST (Power On Self Test).

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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 conserve energy by powering down the
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 power switch. The
switch must pull the 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.

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4-3. 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
4-4. ATX 12V Power Connector: JATXPWR2
PIN Assignment PIN Assignment
1 12V 3 Ground
2 12V 4 Ground
4-5. AUX Power Connector:
JAUXPWR1(Optional)
PIN Assignment PIN Assignment
1 Ground 4 3.3V
2 Ground 5 3.3V
3 Ground 6 5V

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4-6. 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,Ultra DMA / 133 (Optional) 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.
4-7. Floppy Disk Connector: FDD1
The motherboard provides a standard floppy 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.
4-8. 5V/5VSB Selection for KB:
JKBV1(Optional)
JKBV1 Assignment
1 3
1-2 Closed 5V
1 3
2-3 Closed 5V SB

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4-9. 5V/5VSB Selection for USB: JUSBV1
(Optional)
JUSBV1 Assignment
1 3
1-2 Closed 5V
1 3
2-3 Closed 5V SB
4-10. Wake On LAN Header: JWOL1
Pin No. Assignment
1 5V SB
2 Ground
3 Wake up
4-11. Front USB Headers: JUSB2, JUSB3
(JUSB2)
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
(JUSB3)
Pin Assignment Pin Assignment
1 +5V(fused) 2 +5V(fused)
3 USBP4- 4 USBP5-
5 USBP4+ 6 USBP5+
7 Ground 8 Ground
9 KEY 10 NC
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