PCchips M761 V1.x User manual

Chapter 1
Introduction
This mainboard is Intel 440BX 100MHz highly integrated
high-performance mainboard based on the advanced
Pentium¨II microprocessor and featuring the high-end
AGPset chipset. The mainboard offers high flexibility
in configuration and is fully IBM PC/AT compatible.

Introduction 3
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 UserÕs Guide
4. SPDIF/IN cable
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 mainboardÕs hardware. This chapter describes how
to set jumpers and install memory modules, and where
to attach components.

Hardware Configuration 5
CPU Installation
This mainboard supports Intel Pentium¨II CPU using
a Single Edge Contact (SEC) slot. Make sure that you
have the following items (which should be included in
the package) before doing any installation. All parts
are labeled here with item numbers which will be
refered to in the Installation Procedures section. Item 1
and 2 together are the retention mechanism, please
refer to following procedures to complete your CPU
installation.
1) 4 screws:
2) 1 retention clip:

8Chapter 2
Step 4:
And then simply push the screws downward to secure
the the retention clip.
Push in to secure.
Step 5:
Flatten the two latches on the side of CPU. Insert the
CPU into the retention clip. Lock the two latches to
secure the CPU.

ATX Functions & Connectors 11
J4 (21, 22) – ATX Power Button and Suspend
Switch Connector
Attach the ATX Power Button or Suspend Switch 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:
When the system is off, push the power button to turn
the system on. When the system is on, push the power
button rapidly to switch the system to the Suspend
mode, and, by pushing and holding the button for
more than 4 seconds, it will turn the system completely
off. When the system is in the Suspend mode, push the
power button rapidly to turn the system on.
J2 – Wake On LAN Connector
While in Soft-off/Suspend state, if an external LAN
signal occurs, the system wakes up and can be accessed
with the LAN card.
Pin Description
15V Stand By
2Ground
3Active High

Hardware Configuration 13
J4 (2, 4, 6, 8, 10) – Keylock & Power LED
Connector
Keylock connector enables and disables the keyboard
key-in function on the case.
Pin Description
2LED Output
4N.C.
6Ground
8Keylock
10 Ground
J4 (1, 3, 5, 7) – Speaker Connector
Pin Description
1Data Out
3N.C.
5Ground
7+5V
J4 (15, 16) – HDD LED Connector
Pin Description
15 (+) +5V
16 (Ð) Active Low
J4 (17, 18) – Reset Switch Connector
Setting Description
Open Normal Mode
Close Reset System

16 Chapter 2
Memory Installation
The mainboard lets you add up to 768MB of system
memory through DIMM sockets on the board. Three
DIMM sockets are divided into three banks: Bank 0,
Bank 1, and Band 2. The mainboard supports the
following memory configurations.
Bank Memory Module
Bank 0
DIMM14MB, 8MB, 16MB, 32MB, 64MB, 128MB, 256MB
Bank 1
DIMM24MB, 8MB, 16MB, 32MB, 64MB, 128MB, 256MB
Bank 2
DIMM34MB, 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 (ÒÐ12Óparts), while 100MHz clock speed used, the
speed of SDRAM DIMM should meet the PC100 SDRAM
specification (8ns or ÒÐ8Ó SDRAM at least).
2.The EDO DRAM are not recommended for the
performance purpose of the system.