IBM M791 Series User manual

This publication, including all photographs, illustrations and
software, is protected under international copyright laws, with all
rights reserved. Neither this manual, nor any of the material
contained herein, may be reproduced without the express written
consent of the manufacturer.
The information in this document is subject to change without
notice. The manufacturer makes no representations or warranties
with respect to the contents hereof and specifically disclaims any
implied warranties of merchantability or fitness for any particular
purpose. Further, the manufacturer reserves the right to revise this
publication and to make changes from time to time in the content
hereof without obligation of the manufacturer to notify any person
of such revision or changes.
Trademarks
IBM, VGA, and PS/2 are registered trademarks of International
Business Machines.
VIA is a registered trademark of VIA Technologies, Inc.
Microsoft, MS-DOS and Windows 98/ME/NT/2000/XP are
registered trademarks of Microsoft Corporation.
AMI is a registered trademark of American Megatrends Inc.
It has been acknowledged that other brands or product names in
this manual are trademarks or the properties of their respective
owners.
Copyright © 2003
All Rights Reserved
M791 Series, V1.0A
CLE266/October 2003

II
Table of Contents
I
Trademark .....................................................................................I
Static Electricity Precautions.................................................III
Pre-Installation Inspection.....................................................III
Chapter 1: Introduction................................................................1
Key Features............................................................................2
Package Contents.....................................................................6
Chapter 2: Mainboard Installation..............................................7
Mainboard Components ..........................................................8
I/O Ports...................................................................................8
Installing the Processor............................................................9
Installing Memory Modules ..................................................10
Jumper Settings......................................................................12
Install the Mainboard.............................................................12
Connecting Optional Devices................................................13
Install Other Devices .............................................................15
Expansion Slots .....................................................................17
Chapter 3: BIOS Setup Utility ...................................................18
Introduction ...........................................................................18
Running the Setup Utility......................................................19
Standard CMOS Features Page .............................................20
Advanced Setup Page............................................................21
Power Management Setup Page ............................................23
PCI/Plug and Play Setup Page...............................................25
Load Optimal Settings...........................................................26
Load Best Performance Settings............................................26
Features Setup Page...............................................................26
CPU PnP Setup Page.............................................................28
Hardware Monitor Page.........................................................29
Change Password...................................................................29
Exit ........................................................................................30
Chapter 4: Software & Applications..........................................31
Introduction ...........................................................................31
Installing Support Software...................................................32
Bundled Software Installation...............................................34

III
Static Electricity Precautions
Static electricity could damage components on this mainboard.
Take the following precautions while unpacking this mainboard
and installing it in a system.
1. Don’t take this mainboard and components out of their original
static-proof package until you are ready to install them.
2. While installing, please wear a grounded wrist strap if possible.
If you don’t have a wrist strap, discharge static electricity by
touching the bare metal of the system chassis.
3. Carefully hold this mainboard by its edges. Do not touch those
components unless it is absolutely necessary. Put this
mainboard on the top of static-protection package with
component side facing up while installing.
Pre-Installation Inspection
1. Inspect this mainboard whether there are any damages to
components and connectors on the board.
2. If you suspect this mainboard has been damaged, do not
connect power to the system. Contact your mainboard vendor
about those damages.

IV
Notice:
1. Owing to Microsoft’s certifying schedule is various to every
supplier, we might have some drivers not certified yet by
Microsoft. Therefore, it might happen under Windows XP that a
dialogue box (shown as below) pop out warning you this
software has not passed Windows Logo testing to verify its
compatibility with Windows XP. Please rest assured that our
RD department has already tested and verified these drivers.
Just click the “Continue Anyway” button and go ahead the
installation.
2. USB 2.0 Driver Limitations:
2-1. The USB 2.0 driver only supports Windows XP and
Windows 2000.
2-2. If you connect a USB 2.0 hub to the root hub, plugging
USB devices into this hub, the system might not
successfully execute certain USB devices’ connection
because it could not recognize these devices.
Currently, we are working on such limitations’ solution. As soon as
the solution is done, the updated USB drive will be released to our
website: www.pcchips.com for your downloading.

Chapter 1
Introduction
This mainboard has a Socket-370 processor socket for the Intel
FCPGA Celeron, FCPGA Pentium III or VIA C3 Samuel2
processor with front-side bus speed up to 133MHz.
This mainboard integrates the VIA CLE266 Northbridge and
8235 Southbridge chipsets that support DDR 266MHz, Ultra
DMA 33/66/100/133 function and remarkably high system
performance under all types of system operations
It supports built-in USB 2.0 providing higher bandwidth. It
implements Universal Serial Bus Specification Revision 2.0 and
is compliant with UHCI 1.1 and EHCI 0.95. The mainboard
supports the built-in AC97 Codec, two 32-bit PCI slots, one CNR
(Communications and Networking Riser) slot, and an onboard
10BaseT/100BaseTX Network interface (optional). This
mainboard integrates a 128-bit 3D/2D graphics engine and a high-
performance 3D accelerator.
In addition, this mainboard has a full set of I/O ports including two
PS/2 ports for mouse and keyboard, one serial port, one VGA port,
one parallel port and maximum six USB2.0 ports– four back-panel
ports and onboard USB connector USB1 providing two extra ports
by connecting the Extended USB Module to the mainboard.
This mainboard has all the features you need to develop a powerful
multimedia workstation. The board is FLEX ATX size and has a
power connector for an ATX power supply.

2
Key Features
The key features of this mainboard include:
Socket-370 Processor Support
♦Supports the Intel FCPGA Celeron, FCPGA Pentium III
or VIA C3 Samuel2 processors
♦Supports 133 MHz Front-Side Bus
Chipset
There are VIA CLE266 Northbridge and 8235 Southbridge in
this chipset in accordance with an innovative and scalable
architecture with proven reliability and performance. A few of the
chipset’s advanced features are:
♦High bandwidth 266MB/sec 8-bit-Link Host Controller
supports 66MHz V-Link Host interface with total
bandwidth of 266MB/sec
♦Advanced high-performance DDR/SDR DRAM Controller
supports DRAM interface synchronous with host CPU
(133/100 MHz) for most flexible configuration
♦Integrated Graphics/Video Accelerator supports the 128-
bit 3D/2D graphics engine, high quality DVD video
playback, and Motion Compensation MPEG-2/1 Video
Decoder
Memory Support
♦Supports either one DIMM sockets (DIMM1) for DDR or
one DIMM sockets (DIMM2) for SDRAM memory module
♦Supports 266/200 MHz DDR memory bus
♦Maximum installed memory is 1GB
Notice: You CAN NOT use SDRAM and DDR simultaneously.
Expansion Slots
♦One CNR slot
♦Two 32-bit PCI slots for PCI 2.2-compliant bus interface

3
Onboard IDE channels
♦Primary and Secondary PCI IDE channels
♦Support for PIO (programmable input/output) modes
♦Support for Multiword DMA modes
♦Support for Bus Mastering and Ultra DMA ATA
33/66/100/133 modes
Power Supply and Power Management
♦ATX power supply connector
♦Meets ACPI 1.0B and PCI Bus Power Management 1.1
compliant
VGA
♦Intergrated Graphics/Video Accelerator supports optimized
Shared Memory Architecture (SMA)
♦Separate 128-bit data paths between north bridge and
graphics core for pixel data flow and texture/command
access
♦Graphics engine clocks up to 133MHz decoupled from
memory clock
♦High quality DVD video playback
AC97 Codec
♦Compliant with AC’97 2.1 specification
♦16-bit stereo full-duplex CODEC with fixed 48KHz
sampling rate
♦3 analog line-level stereo inputs with 5-bit volume control:
LINE-IN, CD-IN, AUX-IN
♦1 analog line-level mono input: PHONE-IN
♦Three Audio Jacks – Line-Out, Line-In and Microphone-In
♦Sound Blaster, Sound Blaster Pro Compatible
♦Digital I/O compatible with consumer mode S/PDIF
♦Advanced power management support

4
Onboard I/O Ports
The mainboard has a full set of I/O ports and connectors:
♦Two PS/2 ports for mouse and keyboard
♦One serial port
♦One VGA port
♦One parallel port
♦Six USB2.0 ports (four back-panel ports, onboard USB
connector USB1 providing two extra ports)
♦Audio jacks for microphone, line-in and line-out
Built-in Ethernet LAN (optional)
♦10Base-T/100Base-TX Physical Layer Solution
♦Dual Speed – 100/10 Mbps
♦MII Interface to Ethernet Controller/Configuration & Status
♦Auto Negotiation: 10/100, Full/Half Duplex
♦Meet All Applicable IEEE802.3, 10Base-T and 100Base-
TX Standards
USB 2.0
♦Compliant with Universal Serial Bus Specification
Revision 2.0
♦Compliant with Intel’s Enhanced Host Controller
Interface Specification Revision 0.95
♦Compliant with Universal Host Controller Interface
Specification Revision 1.1
♦PCI multi-function device consists of two UHCI Host
Controller cores for full-/low-speed signaling and one
EHCI Host Controller core for high-speed signaling
♦Root hub consists 4 downstream facing ports with
integrated physical layer transceivers shared by UHCI and
EHCI Host Controller
♦Support PCI-Bus Power Management Interface
Specification release 1.1
♦Legacy support for all downstream facing ports

5
BIOS Firmware
This mainboard uses AMI BIOS that enables users to configure
many system features including the following:
♦Hard drives, diskette drives, and peripherals
♦Power management
♦CPU parameters and memory timing
♦Hardware monitoring parameters
The firmware can also be used to set parameters for different
processor clock speeds.
Dimensions
♦FLEX ATX form factor (23 x 19cm)
Note: Hardware specifications and software
items are subject to change without notification.

6
Package Contents
Your mainboard package ships with the following items:
The mainboard
The User’s Manual
One diskette drive ribbon cable (optional)
One IDE drive ribbon cable
The Software support CD
Optional Accessories
You can purchase the following optional accessories for this
mainboard.
The Extended USB module
The CNR v.90 56K Fax/Modem card
Note: You can purchase your own optional accessories
from the third party, but please contact your local
vendor on any issues of the specification and
compatibility.

Chapter 2
Mainboard Installation
To install this mainboard in a system, please follow these
instructions in this chapter:
Identify the mainboard components
Install one or more system memory modules
Make sure all jumpers and switches are set correctly
Install this mainboard in a system chassis (case)
Connect any extension brackets or cables to connectors on the
mainboard
Install peripheral devices and make the appropriate
connections to connectors on the mainboard.
Note:
1. Before installing this mainboard, make sure jumper JBAT1 is
under Normal setting. See this chapter for information about
locating JBAT1 and the setting options.
2. Never connect power to the system during installation;
otherwise, it may damage the mainboard.

8
Mainboard Components
Use the diagram below to identify the major components on the
mainboard.
I/O Ports
The illustration below shows a side view of the built-in I/O ports
on the mainboard.
(
o
p
tional
)

9
PS/2 Mouse Use the upper PS/2 port to connect a PS/2
pointing device.
PS/2 Keyboard Use the lower PS/2 port to connect a PS/2
keyboard.
LPT1 Use LPT1 to connect printers or other
parallel communications devices.
COM1 Use the COM port to connect serial devices
such as mice or fax/modems. COM1 is
identified by the system as COM1.
VGA Use the VGA port to connect VGA devices.
LAN Port
(optional) Connect an RJ-45 jack to the LAN port to
connect your computer to the Network.
USB Ports Use the USB ports to connect USB devices.
Audio Ports Use the three audio ports to connect audio
devices. The first jack is for stereo Line-In
signal. The second jack is for stereo Line-
Out signal. The third jack is for
Microphone.
Installing the Processor
This mainboard has a Socket 370 supporting the Intel FCPGA
Celeron, FCPGA Pentium III or VIA C3 Samuel2 processors.
To ensure reliability, ensure that your processor has a
heatsink/cooling fan assembly.
Do not try to install a Socket 7 processor in the Socket-370. A
Socket 7 processor such as the Pentium-MMX, or the AMD K5/K6
does not fit in the Socket 370. Do not try to install PPGA
Celeron processor in Socket-370.

10
CPU Installation Procedure
Follow these instructions to install the CPU:
1. Unhook the locking lever of the CPU socket. Pull
the locking lever away from the socket and raising
it to the upright position.
2. Match the pin1 corner marked as the beveled edge
on the CPU with the pin1 corner on the socket.
Insert the CPU into the socket. Do not use force.
3. Push the locking lever down and hook it under the
latch on the edge of socket.
4. Apply thermal grease to the top of the CPU.
5. Install the cooling fan/heatsink unit onto the CPU,
and secure them all onto the socket base.
6. Plug the CPU fan power cable into the CPU fan
connector (CPU_FAN) on the mainboard.
Installing Memory Modules
This mainboard accommodates one 184-pin 2.5V unbuffered
Double Data Rate SDRAM (DDR SDRAM), or one 168-pin 3.3V
SDRAM DIMM socket, and supports up to 1.0 GB of 100 /
133 MHz SDRAM or 200 / 266MHz DDR.
Notice: You CAN NOT use SDRAM and DDR simultaneously.
DDR SDRAM provides 1.6 GB/s and 2.1 GB/s data transfer rate
when the bus is 200 MHz or 266 MHz, respectively.
Pin 1
SOCKET
-
370
CPU_FAN
1

11
DDR SDRAM is a type of SDRAM that supports data transfers on
both edges of each clock cycle (the rising and falling edges),
effectively doubling the memory chip’s data throughput. DDR
DIMMs can synchronously work with 200 MHz or 266 MHz
memory bus.
Installation Procedure
These modules can be installed with up to 1 GB system memory.
Refer to the following to install the memory module.
1. Push down the latches on both sides of the DIMM
socket.
2. Align the memory module with the socket. There is
a notch on the DIMM socket that you can install the
DIMM module in the correct direction. Match the
cutout on the DIMM module with the notch on the
DIMM socket.
3. Install the DIMM module into the socket and press
it firmly down until it is seated correctly. The
socket latches are levered upwards and latch on to
the edges of the DIMM.
4. Install any remaining DIMM modules.
DIMM1
DIMM2

12
Jumper Settings
Connecting two pins with a jumper cap is SHORT; removing a
jumper cap from these pins, OPEN.
Jumper JBAT1: Clear CMOS Memory
Use this jumper to clear the contents of the CMOS memory. You
may need to clear the CMOS memory if the settings in the Setup
Utility are incorrect and prevent your mainboard from operating.
To clear the CMOS memory, disconnect all the power cables from
the mainboard and then move the jumper cap into the CLEAR
setting for a few seconds.
Function Jumper Setting
Normal Operation Short Pins 1-2
Clear CMOS Memory Short Pins 2-3
Install the Mainboard
Install the mainboard in a system chassis (case). The board is a
FLEX ATX size mainboard. You can install this mainboard in an
ATX case. Make sure your case has an I/O cover plate matching
the ports on this mainboard.
Install the mainboard in a case. Follow the case manufacturer’s
instructions to use the hardware and internal mounting points on
the chassis.
JBAT1
1

13
Connect the power connector from the power supply to the ATX1
connector on the mainboard.
If there is a cooling fan installed in the system chassis, connect the
cable from the cooling fan to the SYSTEM_FAN fan power
connector on the mainboard.
Connect the case switches and indicator LEDs to the PANEL1
connector.
Pin Signal Pin Signal
1 HD_LED_P 2 FP PWR/SLP
3 HD_LED_N 4 FP PWR/SLP
5 RESET_SW_N 6 POWER_SW_P
7 RESET_SW_P 8 POWER_SW_N
9 RSVD_DNU 10 KEY
Connecting Optional Devices
Refer to the following for information on connecting the
mainboard’s optional devices:
A
TX1
SPK1
1
USB1
1
AUDIO2
1
1
SIR
1
SYSTEM
_
FA
N
1
1
PANEL1

14
SPK1: Speaker Connector
Connect the cable from the PC speaker to the SPK1 connector on
the mainboard.
Pin Signal Pin Signal
1 SPKR 2 NC
3 GND 4 +5V
AUDIO2: Front Panel Audio Connector
This header allows the user to install auxiliary front-oriented
microphone and line-out ports for easier access.
Pin Signal Pin Signal
1 AUD_MIC 2 AUD_GND
3 AUD_MIC_BIAS 4 AUD_VCC
5 AUD_FPOUT_R 6 AUD_RET_R
7 HP_ON 8 KEY
9 AUD_FPOUT_L 10 AUD_RET_L
USB1: Front panel USB Connector
The mainboard has USB ports installed on the rear edge I/O port
array. Additionally, some computer cases have USB ports at the
front of the case. If you have this kind of case, use auxiliary USB
connector USB3 to connect the front-mounted ports to the
mainboard.
Pin Signal Pin Signal
1 VERG_FP_USBPWR0 2 VERG_FP_USBPWR0
3 USB_FP_P0- 4 USB_FP_P1-
5 USB_FP_P0+ 6 USB_FP_P1+
7 GROUND 8 GROUND
9 KEY 10 USB_FP_OC0
1. Locate the USB1 connector on the mainboard.
2. Plug the bracket cable onto the USB1 connector.
3. Remove a slot cover from one of the expansion slots on the
system chassis. Install an extension bracket in the opening.
Secure the extension bracket to the chassis with a screw.
SIR1: Infrared Port
The infrared port allows the wireless exchange of information
between your computer and similarly equipped devices such as
printers, laptops, Personal Digital Assistants (PDAs), and other
computers.

15
Pin Signal Pin Signal
1 NC 2 KEY
3 +5V 4 GND
5 IRTX 6 IRRX
1. Locate the infrared port SIR1 connector on the mainboard.
2. If you are adding an infrared port, connect the ribbon cable
from the port to the SIR1 connector and then secure the port to
an appropriate place in your system chassis.
Install Other Devices
Install and connect any other devices in the system following the
steps below.
Floppy Disk Drive
The mainboard ships with a floppy disk drive cable that can
support one or two drives. Drives can be 3.5” or 5.25” wide, with
capacities of 360K, 720K, 1.2MB, 1.44MB, or 2.88MB.
Install your drives and connect power from the system power
supply. Use the cable provided to connect the drives to the floppy
disk drive connector FDC1.
IDE Devices
IDE devices include hard disk drives, high-density diskette drives,
and CD-ROM or DVD-ROM drives, among others.
IDE1
IDE
2
1
1
FDC1
1

16
1 1
The mainboard ships with an IDE cable that can support one or two
IDE devices. If you connect two devices to a single cable, you
must configure one of the drives as Master and one of the drives as
Slave. The documentation of the IDE device will tell you how to
configure the device as a Master or Slave device. The Master
device connects to the end of the cable.
Install the device(s) and connect power from the system power
supply. Use the cable provided to connect the device(s) to the
Primary IDE channel connector IDE1 on the mainboard.
If you want to install more IDE devices, you can purchase a second
IDE cable and connect one or two devices to the Secondary IDE
channel connector IDE2 on the mainboard. If you have two
devices on the cable, one must be Master and one must be Slave.
Internal Sound Connections
If you have installed a CD-ROM drive or DVD-ROM drive, you
can connect the drive audio cable to the onboard sound system.
When you first start up your system, the BIOS should
automatically detect your CD-ROM/DVD drive. If it doesn’t, enter
the Setup Utility and configure the CD-ROM/DVD drive that you
have installed. On the mainboard, locate the 4-pin connector CD1.
Pin Signal
1 CD IN L
2 GND
3 GND
4 CD IN R
CD1