PCchips M750 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, PC/XT, PS/2, and OS/2 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, Direct Sound 3D,
Direct Music are registered trademarks of Microsoft
Corporation.
A3D is a trademark of Aureal Inc.
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.
M750, Version 1.2
I6dX/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................................................................10
J7 – APIC Slot..................................................................11
Memory Installation.....................................................................11
Jumper Settings ............................................................................12
JP4 – CMOS RAM Clear Selector..................................12
ATX Functions & Connectors.....................................................13
PW1 Ð ATX Power Connector .............................................13
J6 (21, 22) Ð Power Button and Suspend Switch
Connector ...............................................................................13
Alarm Wake Up ....................................................................14
LAN/Modem Ring Wake-On .............................................14
J4 Ð LAN Wake-On Connector............................................15
Keyboard Power-On.............................................................15
JP5 – Keyboard Power On Selector ...............................16
Connectors.....................................................................................16
COM2 – Serial Port #2....................................................17
FDC1 – Floppy Disk Drive Connector...........................17
IDE1/IDE2 – Primary/Secondary IDE Connectors .......17
External Connectors Location........................................17
FAN 1, FAN 2 – CPU Fan Power Connectors ..............18
SB1 – SB Link Connector ...............................................18
IR – Infrared Connector..................................................19
Case Connectors: J6...............................................................19
J6 (2, 4, 6, 8, 10) – Keylock & Power LED Connector..20
J6 (1, 3, 5, 7) – Speaker Connector.................................20
J6 (13, 14) – Turbo LED Connector ...............................20
J6 (15, 16) – HDD LED Connector.................................20
J6 (17, 18) – Reset Switch Connector.............................20
Onboard Sound Pro .....................................................................21
Sound and Game (on the External Connectors) ..........21
CD1/CD2 – Analog Audio from CD-ROM...................22
J1 – Digital Audio Connectors .......................................23

iii
JP2 – SPDIF OUT Signal Level Selector........................23
JP6 – Internal SPDIF IN Connector...............................23
Notice for PCI Sound Pro Application...............................24
The Four Speakers System...................................................25
Chapter 3: BIOS Setup .....................................................................27
Entering BIOS Setup ....................................................................28
Default ...........................................................................................28
Load Optimal Settings .........................................................28
Load Best Performance Settings .........................................29
Setup Items....................................................................................29
Standard CMOS Setup .........................................................29
Advanced CMOS Setup .......................................................30
Advanced Chipset Setup .....................................................33
Power Management Setup...................................................35
PCI/Plug and Play Setup.....................................................37
Peripheral Setup....................................................................39
H/W Monitor & CPU PnP Setup .......................................40
Change Supervisor Password .............................................41
Auto-Detect Hard Disks.......................................................41
Save Settings and Exit ..........................................................41
Exit Without Saving..............................................................41
Chapter 4: SoftWare Driver .............................................................42

Chapter 1
Introduction
This mainboard is an Intel 440BX 100MHz highly
integrated high-performance mainboard which supports
Dual 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 i740 AGP Graphics
Accelerator with 8MB frame buffer and an onboard 3D
PCI 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 dual Pentium® II 233~500MHz and
single Celeron 266~433MHz CPUs
—supports upgradable I/O APIC module to operate
dual Pentium II processor
—supports 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 3.3V SDRAM memory
modules
—supports a maximum size of 768MB system
memory
—supports ECC (1-bit Error Code Correct) function
❏Expansion slots:
—provides 4 PCI, and 3 ISA slots;
❏Onboard 2 IDE ports:
—supports 4 IDE devices maximum
—supports PIO, PCI Bus Master and Ultra
DMA/33/66 operation modes
❏ATX Power Supply:
—provides ATX power connectors and features of
ATX power
—provide Power Button/Suspend Switch and
Keyboard Power On/Off (needs Win98
keyboard) functions
—Alarm Wake Up, LAN/Modem Wake Up
functions
❏Onboard DC-DC Step Down Regulator:
—complies with Intel VRM V8.2 specification
—Over-Voltage and Over-Current protection

Introduction 3
❏Onboard Intel i740 AGP Graphics Accelerator:
—supports AGP Ver 1.0 specification and
66/133MHz
—provides 8MB frame buffer
—high resolution graphic modes up to 1600 x 1200
❏Onboard 3D PCI Sound Pro Features:
—meets PC98' specifications
—full Duplex playback and recording, built-in 16-
bit CODEC with filters
—HRTF 3D Positional Audio technology: supports
both Direct Sound 3D®& A3D®interfaces and
4 channel speakers mode
—supports Windows 3.1/95/98 and Windows NT4.0
—built-in 32 ohm earphone buffer and 3D
surround
—supports MPU-401 Game/MIDI port and legacy
audio SB16
—downloadable Wave-Table Synthesizer supports
Direct Music®
—Digital Audio Interface (SPDIF) In/Out up to
24-bit stereo 44KHz sampling rate voice and
measured 120dB audio quality
—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 temperature, fan speed, and 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, 30.5CM (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. COM2 & Digital Audio ribbon cables/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 JP4 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
I/O
SL2 SL3
PCI4 PCI3 PCI2 PCI1
PW1
DIMM3
DIMM2
DIMM1
IDE2
1
IDE1
1
FDC1
1
1
J1
COM2
1
Sound
Pro
1
JP1 JP2 JP3
JP6
JP5
1
JP4
1
SB1
12
FAN2
Chipset
VGA
Chipset
22 21
1 2
BIOS
J6
SL1
COM1VGA1
PS/2 KBD
PS/2 Mouse
USB(B)
USB(T)
PRN1
Game
Line
In
MICLine
Out
1
CD1 CD2
1
SDRAM
SDRAM
SDRAM
SDRAM
1
FAN1
1
Battery
+
J7
1
J4
IR
1
Figure 2–1. Mainboard Component Locations

8Chapter 2
CPU Installation
This mainboard supports 2 Intel Pentium®II CPU by 2
Single Edge Contact (SEC) slots and a retention clip set
which is fit for 3 different mechanical types of Intel CPU
(SEPP, SECC, and SECC2). The following drawing shows the
retention clip set. It has been preinstalled before shipping to
make the CPU installation easier for users. However, there
are still a few more steps needed to complete the CPU
installation, please refer to the 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, and,
notice that J5 Slot1 must be installed first as shown in the
following drawing.
Chipset
VGA
Chipset
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.

10 Chapter 2
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.
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) or hold
down the <Page Up> key and 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.

Hardware Setup 11
J7 – APIC Slot
While using Dual CPUs, you must insert APIC module
into APIC Slot and repeat the above Step 2 and 3 again to
install another CPU.
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. Supports only 3.3V SDRAM DIMM modules.

12 Chapter 2
Jumper Settings
JP4 – 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
VGA
Chipset
JP4
1
JP4
1
1
1
Description JP4
Normal
Clear CMOS
(default)
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.

Hardware Setup 13
ATX Functions & Connectors
This mainboard supports ATX power and ACPI
specification. The ATX functions and connectors are
described below.
PW1 – 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
J6 (21, 22) – Power Button and Suspend Switch
Connector
Attach the ATX Power Button cable to this connector.
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.

14 Chapter 2
Chipset
VGA
Chipset
22 21
1 2
J6
22 21
1 2
J6
Power Button
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 Alarm Power On option in the BIOS Setup section
will be set to “Enabled.”
LAN/Modem Ring Wake-On
While in Soft-off/Suspend state, if an external LAN/
modem ring-up signal occurs, the system wakes up and
can be remotely accessed. Make sure that the Serial Port2
option in the Power Management Setup of the BIOS
Setup section is set to “Monitor” and the LAN Card
Pwoer On option is set to ”Enabled”.
User must connect LAN card to the following connector
when using LAN Wake-On function.

Hardware Setup 15
J4 – LAN Wake-On Connector
Connect this connector to the LAN card which supports
ACPI spec.
Chipset
VGA
Chipset
1
J4
J4
1 5V Standby
Ground
Active High
Keyboard Power-On
Press the hot key to power on the system when the
Keyboard Power On option is set to “Enabled” in the
Power Management Setup, and also, you need to choose
“Hot Key” in the Stroke Keys Selected option under the
Keyboard Power On option, and set the following jumper.
If the keyboard that supports Win98 Power On function,
you need to set ACPI Wakeup to the Stroke Keys Selected
option.

16 Chapter 2
JP5 – Keyboard Power On Selector
This jumper is designed for the user to turn on the system
by using the keyboard.
JP5
1
1
1
Description JP5
Disabled
(default)
Enabled
Chipset
VGA
Chipset
JP5
1
Note: Make sure that the system power can provide 720mA
on +5VSB(+5V Standby) signal before using Keyboard
Power On function.
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.