VIA Technologies CM35-SC User manual

CM35-SC
CM30-SC
Rev. A+
System Board
Users Manual
44400031

Copyright
This publication contains information that is protected by copyright.
No part of it may be reproduced in any form or by any means or
used to make any transformation/adaptation without the prior
written permission from the copyright holders.
This publication is provided for informational purposes only. The
manufacturer makes no representations or warranties with respect to
the contents or use of this manual and specifically disclaims any
express or implied warranties of merchantability or fitness for any
particular purpose.The user will assume the entire risk of the use or
the results of the use of this document. Further, the manufacturer
reserves the right to revise this publication and make changes to its
contents at any time, without obligation to notify any person or
entity of such revisions or changes.
© 2000. All Rights Reserved.
Trademarks
Microsoft®MS-DOS®, WindowsTM, Windows®95, Windows®98 and
Windows®2000 are registered trademarks of Microsoft
Corporation. Intel®, Pentium®III and CeleronTM are registered
trademarks of Intel Corporation. VIA CyrixIII is a registered
trademark of VIA Technologies, Inc. Award is a registered trademark
of Award Software, Inc. Other trademarks and registered
trademarks of products appearing in this manual are the properties
of their respective holders.
Caution:
Danger of explosion if battery incorrectly replaced.
Replace only with the same or equivalent type recommended by the
manufacturer.
Dispose of used batteries according to the battery manufacturers
instructions.

FCC and DOC Statement on Class B
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 when the equipment is operated in a residential
installation. This equipment generates, uses and can radiate radio
frequency energy and, if not installed and used in accordance with
the instruction manual, 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
following measures:
 Reorient or relocate the receiving antenna.
 Increase the separation between the equipment and the 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 TV 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.
2. Shielded interface cables must be used in order to comply with
the emission limits.

Table of Contents
Read Me First..........................................................
Chapter 1 - Introduction
1.1 Features and Specifications..................................................................................
1.2 Package Checklist.........................................................................................................
Chapter 2 - Hardware Installation
2.1 System Board Layout .............................................................................................
2.2 System Memory.............................................................................................................
2.3 Frequency Ratio Settings for Processors................................................
2.4 Jumper Settings for Selecting the CPUs Front Side Bus...............
2.5 Jumper Settings for Clearing CMOS Data..........................................
2.6 Jumper Settings for the Onboard Audio Codec...........................
2.7 Ports and Connectors.............................................................................................
Chapter 3 - Award BIOS Setup Utility
3.1 The Basic Input/Output System.....................................................................
3.1.1 Standard CMOS Features.............................................................
3.1.2 Advanced BIOS Features..............................................................
3.1.3 Advanced Chipset Features ......................................................
3.1.4 Integrated Peripherals.........................................................................
3.1.5 Power Management Setup............................................................
3.1.6 PnP/PCI Configurations....................................................................
3.1.7 PC Health Status...................................................................................
3.1.8 Frequency/Voltage Control............................................................
3.1.9 Load Fail-Safe Defaults.....................................................................
3.1.10 Load Optimized Defaults..............................................................
3.1.11 Set Supervisor Password...............................................................
3.1.12 Set User Password..............................................................................
3.1.13 Save & Exit Setup.................................................................................
3.1.14 Exit Without Saving..............................................................................
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Chapter 4 - Supported Softwares
4.1 Desktop Management Interface.....................................................................
4.2 VIA Hardware Monitor............................................................................................
4.3 VIA Service Pack..........................................................................................................
4.4 Audio Drivers and Software Application...............................................
4.5 Drivers and Utilities Installation Notes.....................................................
Appendix A - Using the Suspend to RAM
Function
A.1 Using the Suspend to RAM Function........................................................
Appendix B - System Error Messages
B.1 POST Beep.......................................................................................................................
B.2 Error Messages..............................................................................................................
Appendix C - Troubleshooting
C.1 Troubleshooting Checklist....................................................................................
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Introduction
1
6
Read Me First
This page contains a summary of the important notes that must be
given special attention to prior to using the system board.
Processor
 The frequency ratio of some processors may have been locked
by the manufacturer. If you are using this kind of processor,
setting an extended ratio for the processor will have no effect.
The system will instead use its factory default ratio.
 The frequency ratio of processors greater than 8x has been
locked by the manufacturer and will no longer have the flexibility
of using extended ratios. Therefore, the system will use the
processors factory default ratio.
 Selecting an external bus clock other than 66MHz, 100MHz or
133MHz may result to the processors or systems instability and
are not guaranteed to provide better system performance.
System Memory
The system board supports both VCM and PC SDRAM DIMMs. If
you are using more than one DIMM, make sure you insert the same
type of DIMMs into the DIMM sockets. Using different types (VCM
or PC SDRAM) of DIMMs may cause problems.
5VSB Power
 If you are using the (1) Wake-On-LAN and/or (2) Wake-On-
Ring (internal modem) functions, the 5VSB power source of your
power supply must support ≥720mA.
 If you are using the Suspend to RAM function, the 5VSB power
source of your power supply must support ≥1A.
Drivers
Make sure to reboot the system after each driver installation.
Problems will occur if you reboot only after installing all the drivers.

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Introduction
7
1.1 Features and Specifications
1.1.1 Features
Chipset
 VIA®8604/82C686A AGPset (PL133) - CM30-SC
 VIA®8605/82C686A AGPset (PM133) - CM35-SC
Processor
The system board is equipped with Socket 370. It is also equipped
with a switching voltage regulator that automatically detects 1.30V
to 3.5V.
 Pentium®III FCPGA 133MHz FSB (533EB-933EB) or 100MHz
FSB (500E-850E) processor
 CeleronTM 66MHz FSB: FCPGA (566MHz-700MHz) or PPGA
(300A-533MHz) processor
 VIA CyrixIII processor
System Memory
 Up to 1GB using VCM (Virtual Channel Memory) or PC
SDRAM DIMM (unbuffered or registered)
 Two 168-pin DIMM sockets
 Uses x64 PC SDRAM, 3.3V
- PC-66 SDRAM DIMM for 66MHz FSB processors
- PC-100 SDRAM DIMM for 100/66MHz FSB processors
- PC-133 SDRAM DIMM for 133MHz FSB processors
Chapter 1 - Introduction
Note:
If you are using more than one DIMM, make sure you insert
the same type of DIMMs into the DIMM sockets. Using
different types (VCM or PC SDRAM) of DIMMs may cause
problems.

Introduction
1
8
Expansion Slots
The CM35-SC system board is equipped with 1 shared AGP / DFP
(Digital Flat Panel) slot while CM30-SC is only equipped with the
DFP slot.
The AGP slot on the CM35-SC system board is a universal AGP
slot. AGP is an interface designed to support high performance 3D
graphics cards. It utilizes a dedicated pipeline to access system
memory for texturing, z-buffering and alpha blending. The universal
AGP slot supports AGP 2x with up to 533MB/sec. bandwidth and
AGP 4x with up to 1066MB/sec. bandwidth for 3D graphics
applications. AGP in this system board will deliver faster and better
graphics to your PC.
Both system boards are also equipped with 2 dedicated PCI slots
and 1 shared AMR/ISA slot. AMR (Audio/Modem Riser) is an
interface designed for installing an audio riser card, modem riser card
or audio/modem riser card that is compliant to the AMR
specification.
Onboard Graphics Features
 Integrated Savage4 2D/3D/Video accelerator
- Shares 1MB of the system memory
- Optimized Shared Memory Architecture (SMA)
- Full AGP 4x, including sideband addressing and execute mode
- High quality DVD video playback
 3D rendering features
- 32-bit true color rendering
- MPEG-2 video textures
 2D hardware acceleration features
 Motion video architecture
 Software drivers
- Windows®95/98/2000
- Windows NT®4.0
DIMMs
2MBx64
4MBx64
8MBx64
Memory Size
16MB
32MB
64MB
DIMMs
16MBx64
32MBx64
64MBx64
Memory Size
128MB
256MB
512MB

1
Introduction
9
Onboard Audio Features
 Supports Microsoft®DirectSound/DirectSound 3D
 AC97 supported with full duplex, independent sample rate con-
verter for audio recording and playback
ATX Double Deck Ports (PC 99 color-coded connectors)
 Two USB ports
 One NS16C550A-compatible DB-9 serial port
 One DB-15 VGA port
 One SPP/ECP/EPP DB-25 parallel port
 One mini-DIN-6 PS/2 mouse port
 One mini-DIN-6 PS/2 keyboard port
 One game/MIDI port
 Three audio jacks: line-out, line-in and mic-in
Connectors
 One connector for 2 additional external USB ports
 One 9-pin connector for 1 external serial port
 One connector for IrDA interface
 Two IDE connectors
 One floppy drive interface supports up to two 2.88MB floppy
drives
 One 20-pin ATX power supply connector
 One Wake-On-LAN connector
 One Wake-On-Ring connector
 CPU and chassis fan connectors
 Three internal audio connectors (AUX-in, CD-in and TAD)
PCI Bus Master IDE Controller
 Two PCI IDE interfaces support up to four IDE devices
 Supports ATA/33 or ATA/66 hard drives
 PIO Mode 3 and Mode 4 Enhanced IDE (data transfer rate up
to 16.6MB/sec.)
 Bus mastering reduces CPU utilization during disk transfer
 Supports ATAPI CD-ROM, LS-120 and ZIP

Introduction
1
10
IrDA Interface
The system board is equipped with an IrDA connector for wireless
connectivity between your computer and peripheral devices. It
supports peripheral devices that meet the HPSIR and ASKIR
standard.
USB Ports
The system board supports 4 USB ports. Two onboard USB ports
are located at the ATX double deck ports of the board. The J23
connector on the system board allows you to connect the optional
3rd and 4th USB ports. These optional USB ports, which are
mounted on a card-edge bracket, will be provided as an option.
USB allows data exchange between your computer and a wide
range of simultaneously accessible external Plug and Play peripherals.
BIOS
 Award BIOS, Windows®95/98/2000 Plug and Play compatible
 Supports SCSI sequential boot-up
 Flash EPROM for easy BIOS upgrades
 Supports DMI 2.0 function
 2Mbit flash memory
Desktop Management Interface (DMI)
The system board comes with a DMI 2.0 built into the BIOS. The
DMI utility in the BIOS automatically records various information
about your system configuration and stores these information in the
DMI pool, which is a part of the system board's Plug and Play
BIOS. DMI, along with the appropriately networked software, is
designed to make inventory, maintenance and troubleshooting of
computer systems easier. Refer to chapter 4 for instructions on using
the DMI utility.

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Introduction
11
1.1.2 System Health Monitor Functions
The system board is capable of monitoring the following system
health conditions.
 Monitors CPU/system temperature and overheat alarm
 Monitors VCORE/3.3V/5V/12V/2.5V voltages and failure alarm
 Monitors CPU/chassis fan speed and failure alarm
 Automatic CPU and chassis fans on/off control
 Read back capability that displays temperature, voltage and fan
speed
Refer to the PC Health Status section in chapter 3 and the VIA
Hardware Monitor section in chapter 4 for more information.
1.1.3 Intelligence
Automatic CPU/Chassis Fan Off
The CPU and chassis fans will automatically turn off once the system
enters the Suspend mode.
Dual Function Power Button
Depending on the setting in the Soft-Off By PWRBTN field of the
Power Management Setup, this switch will allow the system to enter
the Soft-Off or Suspend mode.
Wake-On-Ring
This feature allows the system that is in the Suspend mode or Soft
Power Off mode to wake-up/power-on to respond to calls coming
through an internal or external modem. Refer to Wake-On-Ring
Connector in chapter 2 and Resume On LAN/Ring (Wake Up
Events field) in the Power Management Setup section in chapter 3
for more information.
Important:
If you are using a modem add-in card, the 5VSB power source
of your power supply must support a minimum of ≥ 720mA.

Introduction
1
12
RTC Timer to Power-on the System
The RTC installed on the system board allows your system to
automatically power-on on the set date and time. Refer to Resume
On Alarm (Wake Up Events field) in the Power Management
Setup section in chapter 3 for more information.
Wake-On-LAN
The Wake-On-LAN function allows the network to remotely wake
up a Soft Power Down (Soft-Off) PC.Your LAN card must support
the remote wakeup function. Refer to Wake-On-LAN Connector in
chapter 2 and Resume On LAN/Ring (Wake Up Events field) in
the Power Management Setup section in chapter 3 for more
information.
Important:
The 5VSB power source of your power supply must support a
minimum of ≥ 720mA.
AC Power Failure Recovery
When power returns after an AC power failure, you may choose to
either power-on the system manually, let the system power-on
automatically or return to the state where you left off before power
failure occurs. Refer to PWR Lost Resume State in the Power
Management Setup section in chapter 3 for more information.
ACPI STR
The system board is designed to meet the ACPI (Advanced
Configuration and Power Interface) specification. ACPI has energy
saving features that enables PCs to implement Power Management
and Plug-and-Play with operating systems that support OS Direct
Power Management. Currently, only Windows®98/2000 supports
the ACPI function allowing you to use the Suspend to RAM function.
With the Suspend to RAM function enabled, you can power-off
the system at once by pressing the power button or selecting
Standby when you shut down Windows®98/2000 without having
to go through the sometimes tiresome process of closing files,
applications and operating system. This is because the system is
capable of storing all programs and data files during the entire

1
Introduction
13
operating session into RAM (Random Access Memory) when it
powers-off. The operating session will resume exactly where you left
off the next time you power-on the system. Refer to Using the
Suspend to RAM Function in appendix A for more information.
Important:
The 5VSB power source of your power supply must support
≥ 1A.
Virus Protection
Most viruses today destroy data stored in hard drives. The system
board is designed to protect the boot sector and partition table of
your hard disk drive.
1.2 Package Checklist
The system board package contains the following items:
þThe system board
þA users manual
þOne card-edge bracket with a serial port
þOne IDE cable for ATA/33 or ATA/66 IDE drives
þOne 34-pin floppy disk drive cable
þOne Main Board Utility CD
If any of these items are missing or damaged, please contact your
dealer or sales representative for assistance.

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14
Hardware Installation
2.1 System Board Layout
Chapter 2 - Hardware Installation
CM30-SC

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Hardware Installation
15
Note:
The illustrations on the following pages are based on the CM35-SC
system board, which is the board with the universal AGP slot.
CM35-SC

2
16
Hardware Installation
2.2 System Memory
The system board is equipped
with two 168-pin DIMM
(Dual In-line Memory Module)
sockets that support VCM or
PC SDRAM DIMM. PC
SDRAM (Synchronous
Dynamic Random Access
Memory) uses a fast memory
interface technology that
includes using the clock on the
chip to synchronize with the
CPU clock so that the timing
of the memory chips and the timing of the CPU are synchronized.
This saves time during transmission of data, subsequently increasing
system performance.
Refer to chapter 1 (System Memory section) for detailed
specification of the memory supported by the system board.
Warning:
Electrostatic discharge (ESD) can damage your system board,
processor, disk drives, add-in boards, and other components. Perform
the upgrade instruction procedures described at an ESD workstation
only. If such a station is not available, you can provide some ESD
protection by wearing an antistatic wrist strap and attaching it to a
metal part of the system chassis. If a wrist strap is unavailable,
establish and maintain contact with the system chassis throughout
any procedures requiring ESD protection.

2
Hardware Installation
17
1. Pull the tabs which are at the ends of the socket to the side.
2. Position the DIMM above the socket with the notches in the
module aligned with the keys on the socket.
3. Seat the module vertically into the socket. Make sure it is
completely seated.The tabs will hold the DIMM in place.
Pin 1
Notch
Key
Tab
Tab
2.2.1 Installing the DIM Module
A DIM module simply snaps into a DIMM socket on the system
board. Pin 1 of the DIM module must correspond with Pin 1 of the
socket.

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18
Hardware Installation
2.3 Frequency Ratio Settings for Processors
The following table shows the available frequency ratios and their
corresponding DIP switch setting.There are 4 switches on SW1.The
black rectangle in the diagram denotes the part that is protruding,
the adjustable switch. Make sure SW1 is set correctly before
applying power, otherwise you will not be able to power-on the
system.
Example:
Switch 1: Off
Switch 2: On
Switch 3: Off
Switch 4: On
--- --- 4x
--- 4.5x
333MHz 5x
Processor SW1
66MHz 100MHz
Freq.
Ratio
5.5x
Processor SW1
66MHz 100MHz
Freq.
Ratio
400MHz
433MHz
466MHz
500MHz
6x
6.5x
7x
7.5x
8x533MHz
500MHz
366MHz
133MHz
533MHz
133MHz
650MHz
700MHz 933MHz*
866MHz
800MHz
750MHz 1GHz*
800MHz 1.066GHz*
667MHz
733MHz
300MHz
300AMHz
550MHz
600MHz
600MHz

2
Hardware Installation
19
Important:
 The frequency ratio of some processors shown in the table
may have been locked by the manufacturer. If you are using
this kind of processor, setting an extended ratio for the
processor will have no effect. The system will instead use its
factory default ratio.
 The frequency ratio of processors greater than 8x has been
locked by the manufacturer and will no longer have the
flexibility of using extended ratios. Therefore, the system will
use the processors factory default ratio.
 At the time this document was printed, the CPUs marked
with asterisk (*) are not yet available. They are included in
the table for reference only.
 The processors supported by the system board support
VID (Voltage Identification). The switching voltage regulator
on the system board will automatically set the voltage
regulator according to the voltage of the processor.

2
20
Hardware Installation
2.4 Jumper Settings for Selecting the CPUs Front
Side Bus
CPU Front Side Bus Select - Jumpers JP1 and JP2
These jumpers are used to select
the front side bus of the
processor installed on the system
board. The default setting is Auto
- the system will automatically run
according to the FSB of the
processor.
Warning:
Some processors, when overclocked, may result to the
processors or systems instability and are not guaranteed to
provide better system performance. If you are unable to boot
your system due to overclocking, make sure to set these
jumpers back to their default settings.
2-3 On1-2 On All Off
JP1
1-2 On
2-3 On
2-3 On
All Off
JP2
1-2 On
2-3 On
All Off
All Off
Auto*
66MHz
100MHz
133MHz
* denotes default setting
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