Biostar U8638 User manual






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.



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) 



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:
           
          !  
"#$%&'(

)*)*+ 
),-.)+

/0$$
123

0  $ !  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














 




 








 

 














 







