JETWAY 635CSR1A User manual

635CS/635CN
USER'S MANUAL
M/B For Socket 370 Pentium

III Processor
NO. G03-635CSR1A
Release date: JULY 2001
** Year 2001 compliant **
Trademark:
* Pentium is registered trademark and MMX is a trademark of Intel Corporation,
the other names and brands are the property of their respective owners
* Specifications and Information contained in this documentation are furnished for information use only, and are
subject to change at any time without notice, and should not be construed as a commitment by manufacturer.

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USER’S NOTICE................................................................................1
MANUAL REVISION INFORMATION..............................................2
THERMAL SOLUTIONS....................................................................2
CHAPTER 1 INTRODUCTION OF 635CS/635CN MOTHERBOARD
1-1 FEATURE OF MOTHERBOARD ...............................................3
1-2 SPECIFICATION ....................................................................4
1-3 PERFORMANCE LIST.............................................................5
1-4 LAYOUT DIAGRAM & JUMPER SETTING ................................6
CHAPTER 2 HARDWARE INSTALLATION
2-1 HARDWARE INSTALLATION STEPS........................................8
2-2 CHECKING MOTHERBOARD'S JUMPER SETTING....................8
2-3 INSTALL CPU........................................................................10
2-3-1 ABOUT PENTIUM& CELERON™ 370-PIN CPU........................10
2-3-2 SETTING CPU BUS CLOCK & MEMORY CLOCK JUMPER.........12
2-3-3 INSTALL CPU.......................................................................12
2-3-4 OVERCLOCK RUNNING ........................................................13
2-4 INSTALL MEMORY................................................................14
2-5 EXPANSION CARD.................................................................15
2-5-1 PROCEDURE FOR EXPANSION CARD INSTALLATION .............15
2-5-2 ASSIGNING IRQ FOR EXPANSION CARD.................................15
2-5-3 INTERRUPT REQUEST TABLE FOR THIS MOTHERBOARD.......16
2-5-4 AGP SLOT............................................................................16
2-6 CONNECTORS, HEADERS.......................................................16
2-6-1 CONNECTORS ......................................................................16
2-6-2 HEADERS.............................................................................19
2-7 STARTING UP YOUR COMPUTER ...........................................22
CHAPTER 3 INTRODUCING BIOS
3-1 ENTERING SETUP..................................................................23
3-2 GETTING HELP .....................................................................24
3-3 THE MAIN MENU...................................................................24
3-4 STANDARD CMOS FEATURES.................................................25
3-5 ADVANCED BIOS FEATURES..................................................27
3-6 ADVANCED CHIPSET FEATURES............................................29
3-6-1 DRAM TIMING SETTINGS......................................................30
3-6-2 AGP FUNCTION SETTINGS ....................................................31
3-7 INTEGRATED PERIPHERALS..................................................31
3-7-1 ONCHIP IDE FUNCTION ........................................................32
TABLE OF CONTENT

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3-7-2 ONCHIP DEVICE FUNCTION..................................................33
3-7-3 ONBOARD SUPERIO DEVICE .................................................34
3-8 POWER MANAGEMENT SETUP...............................................35
3-8-1 PM WAKE UP EVENTS...........................................................36
3-9 PNP/PCI CONFIGURATION SETUP ..........................................37
3-9-1 IRQ RESOURCES ..................................................................38
3-10 PC HEALTH STATUS.............................................................39
3-11 MISCELLANEOUS CONTROL ................................................40
3-12 LOAD STANDARD/OPTIMIZED DEFAULTS .............................40
3-13 SET SUPERVISOR/USER PASSWORD ......................................41
CHAPTER 4 DRIVER & FREE PROGRAM INSTALLATION
MAGIC INSTALL SUPPORTS WINDOWS 95/98/98SE/NT4.0/2000.........42
4-1 AGPVXD INSTALL SIS AGPVXD DRIVER ................................43
4-2 SOUND AC97 SOUND DRIVER AND THE PROGRAM INSTALL
FOR EDITING/PLAYBACK.....................................................44
4-3 LAN (Only for 635CS) INSTALL SIS 900 PCI FAST ETHERNET DRIVER..45
4-4 PC-HEALTH WINBOND HARDWARE DOCTOR MONITORING
SOFTWARE.........................................................46
4-4-1 HOW TO UTILIZE PC-HEALTH ..............................................47
4-5 MAGIC BIOS INSTALL BIOS LIVE UPDATE UTILITY........................47
4-6 PC-CILLIN INSTALL PC-CILLIN 2000 ANTI-VIRUS SOFTWARE AND
APPLICATION PROGRAM.....................................................49
4-7 HOW TO DISABLE ON-BOARD SOUND ....................................51
4-8 HOW TO UPDATE BIOS..........................................................51

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USER’S NOTICE
COPYRIGHT OF THIS MANUAL BELONGS TO THE MANUFACTURER. NO PART OF
THIS MANUAL, INCLUDING THE PRODUCTS AND SOFTWARE DESCRIBED IN IT MAY
BE REPRODUCED, TRANSMITTED OR TRANSLATED INTO ANY LANGUAGE IN ANY
FORM OR BY ANY MEANS WITHOUT WRITTEN PERMISSION OF THE
MANUFACTURER.
THIS MANUAL CONTAINS ALL INFORMATION REQUIRED TO USE 635CS/635CN
MOTHER-BOARD AND WE DO ASSURE THIS MANUAL MEETS USER’S REQUIREMENT
BUT WILL CHANGE, CORRECT ANY TIME WITHOUT NOTICE. MANUFACTURER
PROVIDES THIS MANUAL “AS IS” WITHOUT WARRANTY OF ANY KIND, AND WILL
NOT BE LIABLE FOR ANY INDIRECT, SPECIAL, INCIDENTIAL OR CONSEQUENTIAL
DAMAGES (INCLUDING DAMANGES FOR LOSS OF PROFIT, LOSS OF BUSINESS, LOSS
OF USE OF DATA, INTERRUPTION OF BUSINESS AND THE LIKE).
PRODUCTS AND CORPORATE NAMES APPEARING IN THIS MANUAL MAY OR MAY
NOT BE REGISTERED TRADEMARKS OR COPYRIGHTS OF THEIR RESPECTIVE
COMPANIES, AND THEY ARE USED ONLY FOR IDENTIFICATION OR EXPLANATION
AND TO THE OWNER’S BENEFIT, WITHOUT INTENT TO INFRINGE.

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Manual Revision Information
Reversion Revision History Date
1.0 First Release July 2001
Item Checklist
 635CS/635CN
 Cable for IDE/Floppy
 CD for motherboard utilities
□Cable for USB Port 3/4 (Option)
 635CS/635CN User’s Manual
IntelProcessor Family
Thermal Solutions
As processor technology pushes to faster speeds and higher performance, thermal
management becomes increasingly crucial when building computer systems. Maintaining
the proper thermal environment is key to reliable, long-term system operation. The
overall goal in providing the proper thermal environment is keeping the processor
below its specified maximum case temperature. Heatsinks induce improved processor
heat dissipation through increased surface area and concentrated airflow from
attached fans. In addition, interface materials allow effective transfers of heat from
the processor to the heatsink. For optimum heat transfer, Intel recommends the use of
thermal grease and mounting clips to attach the heatsink to the processor.
When selecting a thermal solution for your system, please refer to the website below
for collection of heatsinks evaluated and recommended by Intel for use with Intel
processors.
Vendor list for heatsink and fan of Pentium® !!! processor, please visit：
http://developer.intel.com/design/Pentiumiii/components/index.htm
Vendor list for heatsink and fan of Intel®Celeron™ processor, please visit：
http://developer.intel.com/design/celeron/components/index.htm

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Chapter 1
Introduction of 635CS/635CN Motherboard
1-1 Feature of motherboard
The 635CS/635CN motherboard is design for use Intel’s new generation Pentium
processors, which utilize the Socket 370 design supports PentiumIII/Tualatin
/Celeron FC-PGA processors, and the memory size expandable to 1GB.
This motherboard use the newest SiS 635 chipset provides a high performance/low
cost solution for socket 370 series CPUs based system, by integrating a high
performance North Bridge, Super-South Bridge and AGP4X Slot.
The 635CS/635CN provided either 2 pcs SDRAM Module socket support PC133
/PC100 SDRAM or 2 pcs DDR (Double Data Rate) SDRAM Module socket support
PC2100/PC1600 DDR SDRAM Module for increase system performance (Do not
using DIMM & DDR Module in combination at same time). System memory size
expandable to 1.0G Bytes.
This motherboard provides 10/100Mb Fast Ethernet interface (Only for 635CS) for
Office requirement and offers AC’97 compliant interface that comprises digital audio
engine with 3D-hardware accelerator, on-chip sample rate converter. This motherboard
also provides dual USB host controller with four USB Ports that deliver better
connectivity in 2x12Mb bandwidth. The built-in Fast PCI IDE controller supports
Ultra DMA 33/66/100 function up to 100MB/s for data transfer rate. In addition,
635CS/635CN provide hardware monitor function that will monitoring and protect
your computer.
This motherboard provides high performance & meets future specification demand.
It is really wise choice for your computer.

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1-2 Specification
Spec Description
Design ∗ Micro ATX form factor 4 layers PCB size: 24.3 x 24.4.cm
Chipset ∗ SiS 635 Chipset
Clock Generator ∗ Support 66/100/133MHz system Bus Clock (CPU Bus
Clock)
Support 100/133 MHz system memory clock
Support 33MHz PCI Bus clock
CPU Socket ∗ Support PentiumIII 500∼1GHz processor
∗ Support Celeron466∼950MHz processor
∗ Support 66, 100 and 133MHz CPU Bus clock
∗ Reserves support for future Intel PentiumIII processors
Memory Socket ∗ 168-pin DIMM Socket x2 support PC-100/PC-133 SDRAM
∗ 184-pin DDR SDRAM Module Socket x2 support
PC2100/PC1600 DDR SDRAM
∗ Expandable to 1GB
∗ Support 3.3V SDRAM Module, 2.5V DDR DRAM Module
Expansion Slot ∗ 32-bit PCI slot x3, 2.2 Specification Compliant
∗ CNR slot x1 for Communication Riser card
∗ AGP slot x1
Integrate IDE ∗ 2 channel of Bus Master IDE port supporting ULTRA DMA
33/66/100 MB/s mode devices
Integrate LAN
(Only for 635CS) ∗ Fast Ethernet Controller 10/100 Mbps transfer rate
Audio ∗ AC’97 Digital Audio controller integrated
∗ AC’97 Audio CODEC on board
∗ Audio driver and utility included
BIOS ∗ Award 2MB Flash ROM
Multi I/O ∗ PS/2 keyboard and PS/2 mouse connectors
∗ Floppy disk drive connector x1
∗ Parallel port x1
∗ Serial port x2
∗ USB connector x2
∗ USB headers x2 (connecting cable option)
∗ Audio connector (Line-in, Line-out, MIC& Game Port)

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1-3 Performance List
The following performance data list is the testing result of some popular benchmark
testing programs. These data are just referred by users, and there is no responsibility
for different testing data values gotten by users (the different Hardware & Software
configuration will result in different benchmark testing results.)
CPU: Intel PIII866MHz/Tualatin 933MHz FC-PGA package
DRAM: 128M SDRAM x2 (Hyundai GM 72V66841ET75)
128M DDR SDRAM x2 (Samsung K4H280838B-TCB0)
VGA Expansion Card: Geforce 256 (1024x768 Hi-color) Driver V3.68
Hard Disk Driver: IBM DTAL-305040 (ATA 100)
BIOS: Award Optimal default
OS: Win 98SE
Performance Test Report
Pentium III 866MHz
SDRAM (133/133) Pentium III 866MHz DDR (133/133) Tualatin 933MHz DDR (133/133)
3D Mark 99 5923 5911 5957
3D Mark 2000 4714 4712 4806
3D Mark 2001 1934 1949 1967
3D Winbench 99 V1.2 897 899 900
3D Winbench 2000 94 94.1 94.8
Final Reality 5.99 5.96 7.76
Winstone 99 V1.3 31.5 31.6 32.3
Content Creation Winstone 2000 33.9 33.9 36.9
Content Creation Winstone 2001 39.8 40.4 42.8
Business Winstone 2001 34.9 34.8 37.5
Winbench 99 :
CPU Mark 99 75.7 75.8 83
FPU Winmark 99 4550 4550 5090
Business Disk Winmark99 4520 4500 4580
Hi-end Disk Winmark99 17200 16800 17200
Business Graphic Winmark 379 379 414
Hi-end Graphic Winmark 1010 1010 1090
SYS Mark 2000 : SISMark 2000 Rating ( Internet Content Creation / Office Productivity )
Suites 170 (171/169) 170 (171/169) 183 (189/179)
Official 168 (170/167) 170 (170/170) 184 (189/180)
SISOFT Sandra 2001 :
Dhrystone ALU MIPS 2333 2333 2605
Whetstone FPU MFLOPS
1157 1157 1242
Int ALU/RAM
MB/S 245 367 447

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Float FPU/RAM MB/S 407 464 479
QUAKE3 DEMO1 FPS 109.7 109.4 117.6
DEMO2
FPS 104.7 104.3 112.5
1-4 Layout Diagram & Jumper Setting
PC99 Back Panel
IR Connector
Wake On LAN
ATX Powe
r
Connector
CNR Slot
Front Panel Audio
SYSTEM FAN
CD Audio
PCI Slo
t
Front Panel Connector
2M Flash ROM BIOS
(JP5)
CPU F.S.B. Clock
PS/2 MOUSE
PS/2 Keyboard
USB COM1 COM2 LINE-OUT
LINE-IN
MIC
PRINT GAME/MIDI PORT
LAN
(Only for 635CS)
Keyboard Power O
n
function (JP4)
USB Power O
n
function (JP3)
Winbond 83697HF
SiS 635 Chip
ATA 100 IDE
Connector
(JP8)
Clear CMOS Jumper
USB2 Port
CPU FAN
CPU Socket
PC133 DIMMX2
PC1600/2100
DDRX2
Floppy Connector
AGP Slot
(JP1, JP2)
CPU F.S.B. Clock

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Jumpers
Jumper Name Description Page
JP1, JP2
JP5 CPU Front Side Bus Frequency Setting 1x2-pin Block 2x4-pin Block p.8
JP3 USB Power ON Function Setting 3-pin Block p.9
JP4 Keyboard Power ON Function Setting 3-pin Block p.9
JP8 CMOS RAM Clear 3-pin Block p.9
Connectors
Connector Name Description Page
U11 ATX Power Connector 20-pin Block p.16
KBMS1 PS/2 Mouse & PS/2 Keyboard
Connector 6-pin Female p.17
USB1 USB Port Connector 2x4-pin Connector p.17
LAN1
(Only for 635CS) LAN Port Connector RJ45 Connector p.17
PARALL Parallel Port Connector 25-pin Female p.17
GAME Audio/Game Connector 3 phone jack+15-pin Connector p.17
COM1/COM2 Serial Port COM1 Connector 9-pin Connector p.17
FDD Floppy Driver Connector 34-pin Block p.18
IDE1/IDE2 Primary/Secondary IDE Connector 40-pin Block p.18
Headers
Header Name Description Page
USB2 USB Port Headers 10-pin Block p.19
IDE LED IDE activity LED 2-pin Block p.19
TURBO LED Turbo LED switch 2-pin Block p.19
RESET Reset switch lead 2-pin Block p.19
SPKR Speaker connector 4-pin Block p.19
POWER LED Power LED 2-pin Block p.19
TWR BTN Power switch 2-pin Block p.19
WOL Wake On-LAN Headers 3-pin Block p.20
CPUFAN, SYSFAN FAN Speed Headers 3-pin Block p.20
IR IR infrared module Headers 10-pin Block p.21
CDIN1, CDIN2 CD Audio-In Headers 4-pin Block p.21
AUDIO Front Panel Audio Headers 9-pin Block p.21
Expansion Sockets
Socket/Slot Name Description Page
ZIF Socket 370 CPU Socket 370-pin FC-PGA/PPGA CPU Socket p.12
SDRAM1, SDRAM2
SDRAM Module Socket 168-pin DIMM SDRAM Module
Expansion Socket p.14
DDR1, DDR2 DDR SDRAM Module Socket 184-pin DDR SDRAM Module Socket p.14
PCI_1, PCI_2, PCI Slot 32-bit PCI Local Bus Expansion Slots p.15

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PCI_3
AGP AGP Slot AGP Expansion Slot p.16
CNR CNR Slot Communication Riser card Slot
Chapter 2
Hardware installation
2-1 Hardware installation Steps
Before using your computer, you had better complete the following steps:
1. Check motherboard setting
2. Install CPU
3. Install Memory
4. Install Expansion cards
5. Connect Ribbon cables, Panel wires, and power supply
6. Setup BIOS
7. Install software driver & utility
2-2 Checking Motherboard’s Jumper Setting
1. CPU & SDRAM Clock Setting : JP1, JP2, JP5
The motherboard’s CPU & SDRAM memory clock adjusted through jumper JP1,
JP2, JP5. Table as below:
JP5 JP1 JP2
CPU/SDRAM (MHz) 1-2 3-4 5-6 7-8
AUTO OFF OFF OFF OFF ON ON
66M OFF OFF OFF OFF OFF OFF
100M OFF OFF OFF ON OFF OFF
133M OFF OFF ON ON OFF OFF
CPU/SDRAM Clock Settin
g
JP5
1
7
AUTO
2
8
1 2
JP2JP1
1 2
JP5
1
7
66M
2
8
1 2
JP2JP1
1 2
JP5
1
7
100M
2
8
1 2
JP2JP1
1 2
JP5
1
7
133M
2
8
1 2
JP2JP1
1 2

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2. USB Power On Function Setting (3-pin): JP3
This allows you to disable the USB power on function. Set the jumper to enabled
or disabled if you wish to use your USB Device to power on your computer.
This feature requires an ATX power supply that can supply at least 300mA on
the +5VSB lead. The default is set to disable
USB Power On Function Settin
g
2-3 closed : Enabled
JP3
1 3
JP3
1 3
1-2 closed : Disabled
3. Keyboard Power On Function Setting (3-pin): JP4
This allows you to disable the keyboard power on function. Set the jumper to
enabled or disabled if you wish to use your keyboard (by pressing < >) to
power on your computer. This feature requires an ATX power supply that can
supply at least 300mA on the +5VSB lead. The default is set to disable.
Ke
y
board Power On Function Settin
g
2-3 closed Enabled1-2 closed Disabled
JP4
1 3
JP4
1 3
4. CMOS RAM Clear (3-pin): JP8
A battery must be used to retain the motherboard configuration in CMOS RAM
short 2-3 pins of JP8 to store the CMOS data.
To clear the CMOS, follow the procedure below:
1. Turn off the system and unplug the AC power
2. Remove ATX power cable from ATX power connector
3. Locate JP8 and short pins 1-2 for a few seconds
4. Return JP8 to its normal setting by shorting pins 2-3
5. Connect ATX power cable back to ATX power connector
Note: When should clear CMOS

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1. Troubleshooting
2. Forget password
3. After over clocking system boot fail
CMOS RAM Clear Setting
2-3 closed Normal
(default)
JP8
1 3
JP8
1 3
1-2 closed Clear CMOS
2-3 Install CPU
2-3-1 About PentiumIII & Celeron™ 370-pin CPU
This motherboard supports both Pentium III & Celeron 370 pins CPU.
Glossary:
Chipset (or core logic) - two or more integrated circuits which control the interfaces
between the system processor, RAM, I/O devises, and adapter cards.
Processor slot/socket - the slot or socket used to mount the system processor on the
motherboard.
Slot (AGP, PCI, ISA, RAM) - the slots used to mount adapter cards and system RAM.
AGP - Accelerated Graphics Port - a high speed interface for video cards; runs at 1X
(66MHz), 2X (133MHz), or 4X (266MHz).
PCI - Peripheral Component Interconnect - a high speed interface for video cards, sound
cards, network interface cards, and modems; runs at 33MHz.
ISA - Industry Standard Architecture - a relatively low speed interface primarily used for
sound cards and modems; runs at approx. 8MHz.
Serial Port - a low speed interface typically used for mouse and external modems.
Parallel Port - a low speed interface typically used for printers.
PS/2 - a low speed interface used for mouse and keyboards.
USB - Universal Serial Bus - a medium speed interface typically used for mouse, keyboards,
scanners, scanners, and some digital cameras.
Sound (interface) - the interface between the sound card or integrated sound connectors and
speakers, MIC, game controllers, and MIDI sound devices.
LAN (interface) - Local Area Network - the interface to your local area network.
BIOS (Basic Input/Output System) - the program logic used to boot up a computer and

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establish the relationship between the various components.
Driver - software, which defines the characteristics of a device for use by another device or
other software.
Processor – the "central processing unit" (CPU); the principal integrated circuit used for
doing the "computing" in "personal computer"
Front Side Bus Frequency
The working frequency of the motherboard, which is generated by the clock generator for
CPU, DRAM and PCI BUS.
CPU Internal Frequency
The frequency of CPU, which is also the actual working frequency of CPU.
Bus Frequency Ratio
The ratio of the working frequency, multiply Front Side Bus Frequency with Bus
Frequency Ratio will form the CPU Internal Frequency.
CPU L2 Cache
The flash memory inside the CPU, normally Pentium III CPU has 256K or above,
while Celeron CPU will have 128K.
Recognize of CPU
The way to recognize the specification of CPU from the packing Pentium III 370
pins FC-PGA
On the surface of the CPU as shown on the right picture, under the word of
“PENTIUM III” the code is:
RB 80526 P2 866 256
RB :
FC–PGA packing
P2 :
P2–133MHz front side bus frequency
PY–100MHz front side bus frequency
866 :
CPU internal frequency, where here is
866MHz
256 :
the size of L2 cache, where here is 256K
Celeron FC–PGA
On the surface of the CPU as shown on the right picture, under the word of
“Celeron” the code is:
566/128/66/1.5V
566 :
CPU internal frequency, where here is 566MHz
128 :
the size of L2 cache, where here is 128K
66 :
front side bus frequency, where here is 66MHz
1.5V: the voltage for the CPU

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2-3-2 Setting CPU Bus Clock Jumper
Setting the front side bus frequency
The motherboard uses jumper JP5 for the front side bus frequency setting as shown
from the table below:
JP5 JP1 JP2
CPU/SDRAM (MHz) 1-2 3-4 5-6 7-8
AUTO OFF OFF OFF OFF ON ON
66M OFF OFF OFF OFF OFF OFF
100M OFF OFF OFF ON OFF OFF
133M OFF OFF ON ON OFF OFF
Example: Using a Pentium

III 866 CPU with front side bus frequency of 133MHz
and PC-133 SDRAM module, the setting of JP5 are 1-2 open, 3-4 open, 5-6
closed, 7-8 closed for CPU BUS CLOCK to be 133MHz and SDRAM CLOCK
to be 133MHz.
For experience user looking for over clocking, please refer to sec 2-3-4
2-3-3 Install CPU
This motherboard provides a ZIF socket 370. The CPU that comes with the
motherboard should have a cooling FAN attached to prevent overheating. If this is
not the case, then purchase a correct cooling FAN before you turn on your system.
WARNING! Be sure that there is sufficient air circulation across the processor’s
heatsink and CPU cooling FAN is working correctly, otherwise it
may cause the processor and motherboard overheat and damage,
you may install an auxiliary cooling FAN, if necessary.
To install a CPU, first turn off your system and remove its cover. Locate the ZIF
socket and open it by first pulling the level sideways away from the socket then
upward to a 90-degree angle. Insert the CPU with the correct orientation as shown
below. The notched corner should point toward the end of the level. Because the
CPU has a corner pin for two of the four corners, the CPU will only fit in the
orientation as shown.

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CPU ZIF Socket 370
Colden Arrow
Socket 370
Intel
PentiumIII
When you put the CPU into the ZIF socket. No force require to insert of the CPU,
then press the level to Locate position slightly without any extra force.
2-3-4 Over clock Running
WARNING! This section is for experienced motherboard installer only. Over
clocking can result in system instability or even shortening life of
the processor.
After setting the Jumper JP5 you can choose over clock running by BIOS CMOS
SETUP UTILITY. When you entered CMOS SETUP UTILITY, choose “Miscellaneous
Control”you will see the screen as below then.
1. You can choose the situation you want to try.
JP5 JP1 JP2
CPU/SDRAM (MHz) 1-2 3-4 5-6 7-8
AUTO OFF OFF OFF OFF ON ON
66M OFF OFF OFF OFF OFF OFF
100M OFF OFF OFF ON OFF OFF
133M OFF OFF ON ON OFF OFF
CMOS Setup Utility - Copyright (C) 1984-2001 Award Software
Miscellaneous Control
Auto Detect DIMM/PCI Clk Enabled
Spread Spectrum Disabled
Item Help
CPU Host/DRAM Clock
Default [ ]
66/66/33MHz ..... [ ]
66/100/33MHz ..... [ ]
100/100/33MHz ..... [ ]
101/101/34MHz ..... [ ]
103/103/34MHz ..... [ ]
110/110/33MHz ..... [ ]
112/112/34MYz ..... [ ]
115/115/34MHz ..... [ ]
100/133/33MHz ..... [ ]
133/100/33MHz ..... [ ]
133/133/33MHz ..... [ ]
135/101/34MHz ..... [ ]
137/103/34MHz ..... [ ]
140/140/35MHz ..... [ ]
↑↓:Move ENTER:Accept ESC:Abort

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Item Help
Auto Detect DIMM/PCI Clk Enabled
Spread Spectrum Disabled
CPU Host/DRAM/PCI Clock Default
CPU Clock Ratio Jumpless By H/W
Menu Level >
CyrixIII CPU Ratio
Adjust
↑↓→←:Move Enter:Select +/-/PU/PD:Value F10:Save ESC:Exit F1:General Help
F5:Previous Values F6:Optimized Defaults F7:Standard Defaults
NOTE! The BIOS allows you select Bus Frequency from 66MHz to 133MHz,
the wrong setting will cause system can not starting, when it happen you
have to clear CMOS and adjust correct setting for your CPU. Again we
don’t suggest user running over clock.
2-4 Install Memory
This motherboard provides two 168-pin DUAL INLINE MEMORY MODULES
(DIMM) sites and two Double Data Rate (DDR) SDRAM Module Socket for memory
expansion available from minimum memory size of 32MB to maximum memory size
of 1GB SDRAM, and only can install either 168-pin SDRAM Module, or 184-pin
DDR Module at the same time.
Valid Memory Configurations
Bank 168-Pin DIMM Total Memory
Bank 0, 1
(DIMM1/DDR1)
SDRAM 32, 64, 128, 256, 512MB
DDR SDRAM 64, 128, 256, 512MB X 1 32MB∼512MB
Bank 2, 3
(DIMM2/DDR2)
SDRAM 32, 64, 128, 256, 512MB
DDR SDRAM 64, 128, 256, 512MB X 1 32MB∼512MB
Total System Memory (Max. 1GB) 32MB∼1GB
Generally, installing SDRAM modules to your motherboard is very easy, you can
refer to figure 2-4 to see what a 184-pin PC2100/PC1600 DDR SDRAM module
looks like.
CPU Host/DRAM Clock
Default [ ]
66/66/33MHz ..... [ ]
66/100/33MHz ..... [ ]
100/100/33MHz ..... [ ]
101/101/34MHz ..... [ ]
103/103/34MHz ..... [ ]
110/110/33MHz ..... [ ]
112/112/34MYz ..... [ ]
115/115/34MHz ..... [ ]
100/133/33MHz ..... [ ]
133/100/33MHz ..... [ ]
133/133/33MHz ..... [ ]
135/101/34MHz ..... [ ]
137/103/34MHz ..... [ ]
140/140/35MHz ..... [ ]
↑↓:Move ENTER:Accept ESC:Abort

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DDR1 (BANK0+BANK1) DDR2 (BANK2+BANK3)
SDRAM2 (BANK0+BANK3) SDRAM1 (BANK0+BANK1)
NOTE! When you install DIMM module fully into the DIMM socket the eject tab
should be locked into the DIMM module very firmly and fit into its
indention on both sides.
WARNING! For the SDRAM CLOCK is set at 133MHz, use only PC133
/PC2100-compliant DIMMs. When this motherboard operate at
133Mhz, most system will not even boot if non-compliant modules
are used because of the strict timing issues, if your DIMM are not
PC133/PC2100-compliant, set the SDRAM clock to 100MHz to
ensure system stability.
2-5 Expansion Cards
WARNING! Turn off your power when adding or removing expansion cards or
other system components. Failure to do so may cause severe
damage to both your motherboard and expansion cards.
2-5-1 Procedure For Expansion Card Installation
1. Read the documentation for your expansion card and make any necessary
hardware or software setting for your expansion card such as jumpers.
2. Remove your computer’s cover and the bracket plate on the slot you intend to use.
3. Align the card’s connectors and press firmly.
4. Secure the card on the slot with the screen you remove above.
5. Replace the computer system’s cover.
6. Set up the BIOS if necessary.
7. Install the necessary software driver for your expansion card.
Figure 2-4

16
2-5-2 Assigning IRQs For Expansion Card
Some expansion cards need an IRQ to operate. Generally, an IRQ must exclusively
assign to one use. In a standard design, there are 16 IRQs available but most of them
are already in use.
Standard Interrupt Assignments
IRQ Priority Standard function
0 1 System Timer
1 2 Keyboard Controller
2 N/A Programmable Interrupt
3 * 11 Communications Port (COM2)
4 * 12 Communications Port (COM1)
5 * 13 Sound Card (sometimes LPT2)
6 14 Floppy Disk Controller
7 * 15 Printer Port (LPT1)
8 3 System CMOS/Real Time Clock
9 * 4 ACPI Mode when enabled
10 * 5 IRQ Holder for PCI Steering
11 * 6 IRQ Holder for PCI Steering
12 * 7 PS/2 Compatible Mouse Port
13 8 Numeric Data Processor
14 * 9 Primary IDE Channel
15 * 10 Secondary IDE Channel
* These IRQs are usually available for ISA or PCI devices.
2-5-3 Interrupt Request Table For This Motherboard
Interrupt request are shared as shown the table below:
INT A INT B INT C INT D
PCI slot 1 Shared 
PCI slot 2 Shared 
PCI slot 3 Shared
Onboard VGA 
AC97/MC97 Shared 
Onboard USB Shared
Onboard USB 2 Shared
LAN (for 635CS Only) Shared 
IMPORTANT! If using PCI cards on shared slots, make sure that the drivers
support “Shared IRQ” or that the cards don’t need IRQ assignments.
Conflicts will arise between the two PCI groups that will make
the system unstable or cards inoperable.

17
2-5-4 AGP Slot
This motherboard provides an AGP Slot, support the 1X/2X/4X AGP VGA card.
AGP SLOT
2-6 Connectors, Headers
2-6-1 Connectors
(1) Power Connector (20-pin block): U11
ATX Power Supply connector. This is a new defined 20-pins connector that usually
comes with ATX case. The ATX Power Supply allows to use soft power on
momentary switch that connect from the front panel switch to 2-pins Power On jumper
pole on the motherboard. When the power switch on the back of the ATX power
supply turned on, the full power will not come into the system board until the front
panel switch is momentarily pressed. Press this switch again will turn off the power to
the system board.
PIN ROW2 ROW1
1 3.3V 3.3V
2 -12V 3.3V
3 GND GND
4 Soft Power On 5V
5 GND GND
6 GND 5V
7 GND GND
8 -5V Power OK
9 +5V +5V (for Soft Logic)
10 +5V +12V
Pin 1
(2) PS/2 Mouse & PS/2 Keyboard Connector: KBMS1
The connectors for PS/2 keyboard and PS/2 Mouse.
(3) USB Port connector: USB1
The connectors are 4-pins connector that connect USB devices to the system board.
(4) LAN Port connector: LAN1 (Only for 635CS)
This connector is standard RJ45 connector for Network connector.
(5) Parallel Port Connector (25-pin female): PARALL