Intel 440BX User manual

The information presented in this publication has been
carefully checked for reliability; however, no responsibility
is assumed for inaccuracies. Specifications are subject to
change without notice.
Trademarks
IBM, PC/AT, and PC/XT are trademarks of International
Business Machines Corporation.
Intel and Pentium®II are trademarks of Intel
Corporation.
AMI is a trademark of American Megatrends Inc.
MS-DOS and WINDOWS 95/98/NT are registered
trademarks of Microsoft Corporation.
Sound Blaster and SB-Link are trademarks of Creative
Technology Ltd.
PC-cillin and ChipAwayVirus are trademarks of Trend
Micro, Inc.
Copyright (C) 1998.
All Rights Reserved.
M760, Version 1.4
I6/December 1998

ii
Contents
Chapter 1: Introduction......................................................................1
Key Features...................................................................................2
Unpacking the Mainboard & Static Electricity Precautions.....5
Chapter 2: Hardware Configuration................................................6
Mainboard Component Locations...............................................7
CPU Installation.............................................................................8
Installation Procedures...........................................................9
CPU Speed Setting................................................................11
Memory Installation.....................................................................12
J13 – DIMM Voltage Selectors.......................................12
Jumper Settings............................................................................13
RTC – CMOS RAM Clear Selector................................13
J16 – Keyboard Power On Selector...............................14
ATX Functions & Connectors.....................................................14
Software Power-Off..............................................................14
Modem Ring Power-On.......................................................15
Alarm Wake Up....................................................................15
Keyboard Power-On.............................................................15
CN1 Ð ATX Power Connector.............................................15
J11 (21, 22) (PWRBT) Ð Power Button and Suspend Switch
Connector...............................................................................16
Connectors.....................................................................................16
External Connectors Loctaion........................................17
FDC1 – Floppy Disk Drive Connector...........................17
IDE1/IDE2 – Primary/Secondary IDE Connectors.......17
J12, J14 – CPU, SYS Fan Power Connectors.................18
IR – Infrared Connector..................................................18
Case Connectors: J11.............................................................19
J11 (2, 4, 6) (Power LED) – Power LED Connector.....19
J11 (8, 10) (KEYLOCK) – KeyLock Switch Connector.19
J11 (1, 3, 5, 7) (SPK) – Speaker Connector....................20
J11 (13, 14) (SP-LED) – Suspend LED Connector....... ........20
J11 (15, 16) (HD-LED) – HDD LED Connector...........20
J11 (17, 18) (RST) – Reset Switch Connector................20
J15 – Suspend Blinking LED Connector........................20
Onboard Sound Pro.....................................................................21
Sound and Game (on the Externals Connectors).........21
J19/J20 – Analog Audio from CD-ROM........................22
J17 – Digital Audio OUT.................................................23

iii
J18 – Digital Audio IN.....................................................23
Sound Pro Drivers Installation and Application..............24
Chapter 3: BIOS Setup .....................................................................25
Entering BIOS Setup ....................................................................26
Default ...........................................................................................26
Load Optimal Settings .........................................................26
Load Best Performance Settings .........................................26
Setup Items....................................................................................27
Standard CMOS Setup .........................................................27
Advanced CMOS Setup .......................................................29
Advanced Chipset Setup .....................................................31
Power Management Setup...................................................34
PCI/Plug and Play Setup.....................................................37
Peripheral Setup....................................................................39
CPU Plug and Play Setup ....................................................41
Change Supervisor Password .............................................42
Auto-Detect Hard Disks.......................................................42
Save Settings and Exit ..........................................................42
Exit Without Saving..............................................................42
Chapter 4: SoftWare Driver .............................................................43

Chapter 1
Introduction
This mainboard is an Intel 440BX 100MHz highly
integrated high-performance mainboard based on the
advanced Pentium® II microprocessor and provides CPU
Plug and Play feature for faster and easier CPU
installation. The mainboard features highly flexible
configurations and is fully IBM PC/AT compatible.
The mainboard uses a high-end AGPset chipset that
supports the PCI/ISA and Green standards, provides the
Host/AGP bridge, and integrates all system control
functions such as ACPI(Advanced Configuration and
Power Interface). The ACPI provides more energy saving
features for the OSPM(OS Direct Power Management)
function.
The mainboard has a built in high performance 64-bit 3D
AGP Graphics Accelerator with 8MB frame buffer and an
onboard 3D Sound Pro to meet PC98' specifications for
3D Multimedia systems, and built-in Hardware Monitor
circuit to monitor CPU/Chasis temperatures/fan
speeds/voltages with AMI Desktop Client Manager and
options to support Intel LANDesk Client
Manager(LDCM). And the mainboard BIOS provides
Trend's ChipAwayVirus to ensure the entire boot process
virus free.

2Chapter 1
Key Features
The advanced features of the mainboard include:
❏Intel 440BX AGP chipset:
— supports Pentium® II 233~500MHz and Celeron
266~333MHz CPUs
— supports both 66.6MHz and 100MHz FSB (Front
Side Bus)
— provides CPU Plug and Play feature for faster and
easier CPU installation
❏Memory:
— provides 3 DIMMs for SDRAM/EDO (for 66MHz
FSB only) memory modules
— supports a maximum size of 768MB system
memory
— supports ECC Error Correct function
❏Expansion slots:
— provides 3 PCI, and 1 ISA slots;
❏Onboard 2 IDE ports:
— supports 4 IDE devices maximum
— supports PIO, PCI Bus Master and Ultra DMA/33
operation modes
❏ATX Power Supply:
— provides ATX power connector and features of
ATX power
— provides Power Button/Suspend Switch and
Keyboard Power On functions
— Alarm Wake Up and Modem Wake Up functions

Introduction 3
❏Onboard DC-DC Step Down Regulator:
— complies with Intel VRM V8.2 specification
❏Onboard 64-bit 3D AGP Graphics Accelerator:
— supports AGP Ver1.0 specification compliant and
66/133MHz
— provides 8MB frame buffer
— high resolution graphic modes up to 1600x1200
❏Onboard 3D SoundPro Features:
— meets PC98' specifications
— supports both Sound Blaster 16/Pro and
Windows Sound System
— supports HRTF 3D Positional Audio technology
— provides drivers for Windows Direct Sound 3D
— provides drivers for 3D games that use Aureal
software interface
— built-in Digital Audio Interface (SPDIF) In/Out
— built-in software Wave-Table Synthesizer
— bull Duplex 16-bit CODEC with filters
— Stereo Mixer supports analog mixing from CD-
Audio, Line-In, and digital mixing from voice,
FM/Wave-Table and digital CD-Audio
❏Onboard Multi-I/O and Peripheral interface,
including:
— 1 floppy port with 1 MB/s transferring rate
— 2 serial ports with 16550 compatible with Fast
UART
— 1 parallel port with EPP and ECP capabilities
— 2 USB ports and PS/2 keyboard/mouse ports
— 1 IR interface
❏Built-in Hardware Monitor circuit:
— detects CPU/Chasis temperature and fan speed
— displays actual current voltages
— supports Intel LANDesk Client Manager (LDCM)

4Chapter 1
❏BIOS:
— Onboard 2M Flash ROM supports complete
ACPI and Legacy PMU and is fully compatible
with PC97 and PC98
— provides Plug & Play function which detects the
peripheral devices and expansion cards
automatically
— supports Trend’s ChipAwayVirus option to
ensure the entire boot process is virus free, no
installation and configuration worries
❏Bundled:
— AMI Desktop Client Manager detects abnormal
condition and thermal management through the
network link or self care
—PC-cillin98 (OEM) provides automatic virus
protection for Windows 95/98 and the Internet
❏Dimension:
— ATX Form Factor, 24.4cm (L) x 22cm (W)

Introduction 5
Unpacking the Mainboard & Static
Electricity Precautions
This Mainboard package contains the following items:
1. This Mainboard and the Device Driver
2. The Slot1 holder and AT cables
3. This User’s Guide
4. SPDIF/IN cable
5. VGA cable/bracket
The mainboard is easily damaged by static electricity.
Follow the precautions below while unpacking or
installing the mainboard.
1. Do not remove the mainboard from its original
package until you are ready to install it.
2. Frequently ground yourself to discharge any static
electric charge that may build up in your body
while working on installation and/or
configuration. For example, you may ground
yourself by grasping an unpainted portion of the
systemÕs metal chassis.
3. Remove the mainboard from its anti-static
packaging and place it on a grounded surface,
component side up.
4. Handle the mainboard by its edges or by the
mounting bracket to avoid touching its
components.
5. Check the mainboard for damage. If any integrated
circuit appears loose, press carefully to seat it
firmly in its socket.
6. Do not apply power if the mainboard appears
damaged. If there is damage to the board contact
your dealer immediately.

Chapter 2
Hardware Configuration
Before you install the mainboard into the system chassis,
you may find it convenient to first configure the
mainboard’s hardware. This chapter describes how to set
jumpers and install memory modules, and where to
attach components, however, the CMOS jumper is set on
the “Clear” position when this mainboard is shipped and
you need to set it to the “Normal” position in order for
the mainboard perform properly.
Warning: Set RTC to “Normal” position before setting other
jumpers or memory modules. This mainboard will
not function properly if you fail to do so.

Hardware Setup 7
Mainboard Component Locations
SPK RST
PWRBT
KY-LOCK
22
21
1
2
SP-LED
J11
HD-LED
PCI3 PCI2 PCI1
DIMM1DIMM2DIMM3
IDE2
1
IDE1
1
Battery
+
Chipset
Sound Pro
COM1COM2
PS/2 KBD
PS/2 Mouse
USB(B)
USB(T)
LPT1
SL1
USB1 KBMS
CN1
FDC1
1
I/O Chip
VGA
Chipset
BIOS
VDRAM VDRAM VDRAM VDRAM
J3
1
H/W Monitor
J13
1
J12
J14
RTC
1
J16
1
J17
J18
1
Game
PH1PH2PH3
1
J19
J20
J15
IR
1
Figure 2–1. Mainboard Component Locations

8Chapter 2
CPU Installation
This mainboard supports Intel Pentium®II CPU using a
Single Edge Contact (SEC) slot and a retention clip, as is
shown in the following drawing which has been pre-
installed before shipping to make the CPU installation
easier for users. However, there are still a few more steps
needed to complete the CPU installation, refer to
following procedures.

Hardware Setup 9
Installation Procedures
Follow the following steps in order to install your Intel
Pentium®II properly.
Step 1:
Make sure that the mainboard is set the same direction as
the following drawing before doing any installation.
+
Chipset
Sound Pro
VGA
Chipset
I/O Chip

10 Chapter 2
Step 2:
There is one set of the Slot1 Holder retention that was
installed on your motherboard, and the two chutes of
Holder retention are screwed in. Lift up both of the
Holder chutes as shown in the following drawing.
Step 3:
Flatten the two latches on the side of CPU. Insert the
CPU into the Holder retention. Lock the two latches to
secure the CPU.
If CPU is Celeron, then, continue the following step.

Hardware Setup 11
Step 4:
After installing Celeron CPU into the Holder retention,
then push the retention locker (only for Celeron CPU)
downward to secure the Celeron CPU as indicated in the
following 2 drawings.
CPU Speed Setting
This mainboard provides CPU Plug and Play technology,
so that there is no need to do the CPU jumper setting.
Enter the BIOS Setup and select “CPU Plug and Play
Setup”. Choose the correct CPU speed to match your
CPU installed.
However, if you need to change a CPU, follow the below
steps:
1. Power off system and unplug the power core.
2. Install a new CPU to Slot1.
3. Clear CMOS RAM (see Jumper Settings) then power
on the system.
4. After power on the system, then enter the BIOS
Setup section to set the new CPU speed.
Note: If the CPU speed is set incorrectly and fails to boot up
the system, then repeat steps 1, 3, 4 again.

12 Chapter 2
Memory Installation
The mainboard lets you add up to 768MB of system
memory through 3 DIMM sockets on the board, that is
divided into 3 banks: Bank 0, Bank 1, and Bank 2, which
supports the following memory configurations.
Bank Memory Module
Bank 0
DIMM1 4MB, 8MB, 16MB, 32MB, 64MB, 128MB, 256MB
Bank 1
DIMM2 4MB, 8MB, 16MB, 32MB, 64MB, 128MB, 256MB
Bank 2
DIMM3 4MB, 8MB, 16MB, 32MB, 64MB, 128MB, 256MB
Total System Memory = Bank 0 + Bank 1 + Bank 2
Notes:1.The speed of SDRAM DIMM modules have to be faster than
12ns (“–12”parts), while 100MHz clock speed used, the speed
of SDRAM DIMM should meet the PC100 SDRAM
specification (8ns or “–8” SDRAM at least).
2.The EDO/FPM DRAM are not recommended for the
performance purpose of the system.
J13 – DIMM Voltage Selectors
+
Chipset
Sound Pro
VGA
Chipset
I/O Chip
J13
Voltage J13
5V
3.3V
(default)
J13
1
1
1

Hardware Setup 13
Jumper Settings
RTC – CMOS RAM Clear Selector
The battery on this mainboard is designed to retain the
system configuration in CMOS RAM. In order to save the
life of the battery, this jumper is set to “Clear CMOS”
position when this board is shipped, therefore, you need
to set this jumper to “Normal” position before setting
other jumpers or memory modules.
+
Chipset
Sound Pro
VGA
Chipset
I/O Chip
RTC
1
RTC
1
1
1
Description RTC
Normal
Clear CMOS
(while shipping)
Note: 1. This jumper needs to be set on Normal Mode before
using.
2. Turn off the system and unplug the power core when
you need to clear the CMOS.

14 Chapter 2
J16 – Keyboard Power On Selector
This jumper is designed for the user to turn on the system
by using the keyboard, and, the user must enter BIOS
Setup to set the “Keyboard Power ON” and the “Stroke
Keys Selected” options in the Advanced Chipset Setup.
+
Chipset
Sound Pro
VGA
Chipset
I/O Chip
J16
1J16 1
1
1
Description J16
Disabled
(default)
Enabled
Note: Make sure that the system power can provide 800mA
on +5VSB(+5V Standby) signal before using Keyboard
Power On function.
ATX Functions & Connectors
This mainboard supports ATX power and ACPI
specification. The ATX functions and connectors are
described below.
Software Power-Off
Follow the steps below to use the “Software Power-Off
Control” function in Windows 95/98 with ATX power
supply.
1. Click the START button on the Windows 95/98 task
bar.
2. Select Shut Down The Computer to turn off the
computer. The message “It is now safe to turn off
your computer.” will not be shown when using this
function.

Hardware Setup 15
Modem Ring Power-On
While in Soft-off/Suspend state, if an external modem
ring-up signal occurs, the system wakes up and can be
remotely accessed. Make sure that the Serial Port 2
option in the Power Management Setup of the BIOS
Setup section is set to “Monitor” and the Ring Resume
From OFF option is set to ”Enabled”.
Alarm Wake Up
If you want to autoboot the system at a certain time, set
the function of RTC Alarm time properly and the function
of RTC Resume From Off option in the BIOS Setup
section will be set to “Enabled.”
Keyboard Power-On
Press the hot key to power on the system when the K/B
Resume From option is set to “Enabled” in the BIOS
Setup section, and you can press any keys to power on
your system.
CN1 – ATX Power Connector
The ATX power supply is a single 20-pin connector.
Connect the ATX power supply to this connector which
provides all power for the mainboard.
Pin Description Pin Description Pin Description Pin Description
1 3.3V 6 +5V 11 3.3V 16 Ground
2 3.3V 7 Ground 12 –12V 17 Ground
3 Ground 8 Power OK 13 Ground 18 –5V
4 +5V 9 5VSB 14 PS-ON 19 +5V
5 Ground 10 +12V 15 Ground 20 +5V

16 Chapter 2
J11 (21, 22) (PWRBT) – Power Button and Suspend
Switch Connector
Attach the ATX Power Button cable to this connector.
In the AT power system, this connector will act as a
suspend switch; and in the ATX power system, this
connector will be not only an ATX power button but a
Suspend switch as well. Details are described below:
Turn the system back on by pushing the power button,
and, if the system is already on, pushing the power
button allows the system to be switched to the Suspend
mode. However, if push and hold the power button for
more than 4 seconds, then the system will be turned off
completely.
And, if the system is already in the Suspend mode,
pushing the power button rapidly will turn on the system.
Connectors
Attach system components and case devices to the
mainboard via the mainboard connectors. A description of
each connector pins follows. See Figure 2–1 for the
location of the connectors on the mainboard.
Note: Make sure that the power is turned off before making
any connection to the board.