PCchips M575V12 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 are trademarks of Intel Corporation.
AMD is a trademark of Advanced Micro Devices Inc.
Cyrix is a trademark of Cyrix Corporation.
IDT is a trademark of Integrated Devices Technology
Corporation.
AMI is a trademark of American Megatrends Inc.
MS-DOS and WINDOWS NT are registered trademarks
of Microsoft Corporation.

ii
Contents
Chapter 1: Introduction ......................................................................2
Key Features ...................................................................................3
Unpacking the Mainboard & Static Electricity Precautions.....5
Chapter 2: Hardware Configuration................................................7
Mainboard Component Locations ...............................................8
Connectors.......................................................................................9
PWR1 Ð AT Power Supply Connectors ...............................9
COM1/2 Ð Serial Port #1/#2.................................................9
PRN Ð Parallel Port .................................................................9
FDC Ð Floppy Disk Port .........................................................9
IDE1/IDE2 Ð Primary/Secondary IDE Ports......................9
PS1 Ð PS/2 Mouse Head Connector .....................................9
PS2 Ð PS/2 Mouse Pin Connector.........................................9
KBD Ð Keyboard Connector ..................................................9
J3 Ð ATX Form Card Connector ............................................9
J3 (1-4, 10-13) Ð 2 sets of Universal Serial Bus (USB)
Connectors ...............................................................................9
J3 (5-6, 15-16) Ð PS/2 Mouse Connector ............................10
J3 (7-9, 17-18) Ð Infrared Connector....................................10
J2 (2, 4, 6, 8, 10) (KEY LOCK) Ð Keylock & Power LED
Connector ...............................................................................10
J2 (1, 3, 5, 7) (SPK) Ð Speaker Connector............................10
J2 (13, 14) (TB-LED) Ð Turbo LED Connector ...................11
J2 (15, 16) (HDD-LED) Ð HDD LED Connector ................11
J2 (17, 18) (RST) Ð Reset Switch Connector .......................11
J2 (19, 20) (SP-LED) Ð Suspend LED Connector ...............11
J1 (FAN-PWR) Ð Fan Power ................................................11
Sound Pro Connectors:.........................................................12
CD1/CD2 Ð Analog Audio for Sony/Panasonic .............12
J4 Ð Sound and Game ...........................................................12
J7 Ð Digital Audio IN ............................................................12
J6 Ð Digital Audio OUT........................................................12
Jumper Settings ............................................................................13
JP1 Ð CMOS RAM Clear Selector* ......................................13
JP4 Ð DIMM Voltage Selectors** .........................................13
JP3 Ð CPU Type Selector ......................................................13
JP6 Ð CPU Core Voltage Selectors.......................................13
JP5 (A, B) Ð CPU Internal Clock Speed Selectors .............14
JP7 (A, B) Ð CPU External Clock Selectors.........................14

iii
JP9 Ð Sound Pro Selector ......................................................14
J5 Ð MIC Type Selector .........................................................14
Memory Installation.....................................................................15
Chapter 3: ACPI Functions & Connectors with ATX Power .....16
PWR2 Ð ATX Power Connector ..........................................16
Software Power-Off ..............................................................17
Modem Ring Power-On .......................................................17
Alarm Wake Up ....................................................................17
J2 (21, 22) (PWRBT) Ð ATX Power Button and Suspend
Switch Connector ..................................................................18
Chapter 4: BIOS Setup .....................................................................19
Entering WinBIOS Setup.............................................................20
Default ...........................................................................................21
Setup Window ..............................................................................21
Standard Setup ......................................................................22
Advanced Setup ....................................................................23
Chipset Setup.........................................................................25
Power Management Setup...................................................26
PCI/PnP Setup ......................................................................28
Peripheral Setup....................................................................30
Security ..........................................................................................31
User .........................................................................................31
Anti-Virus...............................................................................31
Utility .............................................................................................32
Detect IDE ..............................................................................32
Exit WinBIOS Setup .....................................................................32
Save Changes and Exit .........................................................32
Do Not Save Changes and Exit ...........................................32
Continue .................................................................................32

Chapter 1
Introduction
The mainboard is a high-performance mainboard based
on the advanced Pentiumª microprocessor and
featuring PCI Local Bus and the high-end chipset. The
mainboard offers a high degree of flexibility in
configuration and is fully IBM PC/AT compatible.

Introduction 3
Key Features
The advanced features of this mainboard include:
¥ Supports Pentiumª 90 ~ 300 MHz with
P54C/P55C (MMXª), Cyrix/IBM 6x86, 6x86L,
6x86MX (M2), IDT C6, and AMD K5/K6 CPUs at
60/66/75/83.3 MHz external clock speed
¥ Supports Write Allocation feature for AMD K6;
Error Checking & Correction (ECC) and Parity for
DRAM; Linear Wrap Mode for Cyrix M1, M2
¥ Supports 64M-bit (16Mx4, 8Mx8, 4Mx16)
DRAM/SDRAM technology
¥ Provides 4 x 72-pin SIMM and 3 x 168-pin DIMM to
support FPM/EDO/SDRAM modules ÒTable FreeÓ
configuration so that DIMM and SIMM can be
installed in any combinations up to 384MB
¥ Supports single piece of 72-pin SIMM working
capability
¥Onboard 1MB (1024KB) Pipelined Burst
synchronous L2 cache
¥ Dual 20-pin ATX and 12-pin AT power connectors;
ATX power supports Modem Ring On, Suspend
Switch, and Alarm Wake Up
¥ Supports Ultra DMA/33 and ACPI
¥ Provides auto switching power between 2.2V and
3.5V for CPU Core voltage
¥ Supports 2.88MB, Iomega ZIP-100M, and IDE LS-
120 FDD, bootable from floppy, HDD ,CD-ROM,
SCSI, NetWork, LS-120, ZIP, or others
¥ 4 PCI Local Bus slots and 3 x 16 bits ISA Bus slots
¥ Onboard PCI Bus Master IDE interface supports 4
IDE devices with 2 channels; BIOS supports 4 IDE
harddisk drives which do not need device driver

4Chapter 1
for S/W application and the capacity of each
harddisk can be larger than 528MB and up to 8.4GB
¥ PCI IDE Controller supports PIO Mode 0 to Mode 4
and Ultra DMA/33 at maximum transfer rate of 33
MB/s and Bus Master IDE DMA Mode 2
¥ Onboard super Multi-I/O chip supports 2 serial
ports with 16550 fast UART compatible, 1 parallel
port with EPP and ECP capabilities, and one floppy
disk drive interface
¥ Supports PS/2 Mouse connecor and pin header
¥Supports ATX FORM CARD containing PS/2
Mouse, USB interface x 2, and Infrared connectors
(optional)
¥ BIOS supports NCR810 SCSI BIOS firmware and
ÒPlug & PlayÓ Flash ROM
¥ Onboard Sound Pro supports the following
features:
Ñ Sound Blaster 16/PRO compatible with stereo
voice up to 48KHz sampling rates, HRTF 3D
Positional Audio Technology
Ñ Windows Sound System V2.0 compatible,
Accelerates Direct Sound 3D in Win95, and
Windows 95/31 & DOS drivers supported
Ñ Supports 44.1K digital audio (SPDIF) IN/OUT,
HSP-23 Wavetable synthesizer, full duplex 16-
bits CODEC with filters, and high quality 3D
sound (ON/OFF controllable)
Ñ Device supports SB16, WSS, & Game
Ñ Stereo Mixer supports analog mixing form CD-
Audio & Line-In and digital mixing from Voice,
FM/Wave-table, and digital CD-Audio.

Introduction 5
Unpacking the Mainboard & Static
Electricity Precautions
This Mainboard package contains the following items:
1. The Mainboard
2. The Device Driver for this mainboard
3. This UserÕs Guide
4. Sound & Game ribbon cables/bracket
5. ATX Form Card (optional)
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.

6Chapter 1
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.

8Chapter 2
Mainboard Component Locations
PCI4 PCI3 PCI2 PCI1
SIMM4SIMM3SIMM2SIMM1
DIMM1 DIMM2DIMM3
COM1 COM2
Socket 7
PWR1
14
Fan-PWR
PRN
PS1
JP6
ABCDEF
AB
JP4
JP3
1
BA
KBD
JP7
1
JP1
12 12
IDE2
1
FDC
1
CBA
JP5
1
3
J3
10 1
Battery
+
IDE1
1
PWR2
3.3V
5V
HDD-LED
SP-LED
SUS-SW
SPK
J2
1
221 22
++
TB-LED
RST
Keylock
12
PS2
Version
Cache
Cache
BIOS
Chipset
Chipset
1
CD1
CD2
J7J6
J5
26 13
1
J4
JP9
14
1
Figure 2Ð1. Mainboard Component Locations

Hardware Configuration 9
Connectors
Attach system components and case devices to the
mainboard via the mainboard connectors. See Figure
2Ð1 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.
PWR1 – AT Power Supply Connectors
COM1/2 – Serial Port #1/#2
PRN – Parallel Port
FDC – Floppy Disk Port
IDE1/IDE2 – Primary/Secondary IDE Ports
PS1 – PS/2 Mouse Head Connector
PS2 – PS/2 Mouse Pin Connector
KBD – Keyboard Connector
J3 – ATX Form Card Connector
J3 (1-4, 10-13) – 2 sets of Universal Serial
Bus (USB) Connectors
USB USB
Pin Description Pin Description
1 +5V 10 +5V
2 Data Ð 11 Data Ð
3 Data + 12 Data +
4 Ground 13 Ground

10 Chapter 2
J3 (5-6, 15-16) – PS/2 Mouse Connector
Pin Description
5 +5V
6 Mouse CLK
15 Mouse Data
16 Ground
J3 (7-9, 17-18) – Infrared Connector
Pin Description
7 Ground
8 Reserved
9 +5V
17 IR In
18 IR Out
J2 (2, 4, 6, 8, 10) (KEY LOCK) – Keylock &
Power LED Connector
Keylock connector enables and disables the keyboard
key-in function on the case.
Pin Description
2 LED Output
4 N.C.
6 Ground
8 Keylock
10 Ground
J2 (1, 3, 5, 7) (SPK) – Speaker Connector
Pin Description
1 Data Out
3 N.C.
5 Ground
7 +5V

Hardware Configuration 11
J2 (13, 14) (TB-LED) – Turbo LED
Connector
Pin Description
13 (+) Anode
14 (Ð) Ground
J2 (15, 16) (HDD-LED) – HDD LED
Connector
Pin Description
15 (+) +5V
16 (Ð) Active Low
J2 (17, 18) (RST) – Reset Switch Connector
Attach the Reset push button cable to this connector.
Setting Description
Open Normal Mode
Close Reset System
J2 (19, 20) (SP-LED) – Suspend LED
Connector
Pin Description
19 (+) +5V
20 (Ð) Active Low
J1 (FAN-PWR) – Fan Power
Pin Description
1 +12V
2 Ground
3 Ground
4 +5V

12 Chapter 2
Sound Pro Connectors:
CD1/CD2 – Analog Audio for
Sony/Panasonic
Connect to ÒAUDIOÓ on the CD-ROM drive.
J4 – Sound and Game
Sound contains Line-in/MIC (Microphone), and Line-
out (Speaker). Game connector is also the Joystic
connector. Connect this connector to the Sound &
Game ribbon cable/bracket as the following drawing:
Line-In MIC Line-Out Game
J4 J4
J7 – Digital Audio IN
Depending on the type of your CD-ROM drive to
connect this connector to ÒDIGITAL AUDIOÓ on the
CD-ROM drive.
J6 – Digital Audio OUT
Connect to the Digital Audio Device.

Hardware Configuration 13
Jumper Settings
JP1 – CMOS RAM
Clear Selector*
Description Setting
Normal Mode
31
Clear CMOS
(default)
31
JP4 – DIMM Voltage
Selectors**
Voltage
Selectors
Setting
5V
15V
3.3V
3.3V
(default)
15V
3.3V
JP3 – CPU Type Selector
CPU Setting Example
P55C
(Dual Voltage)
(default)
AB
1
Intel MMXª,
AMD K6, IBM/Cyrix
6x86L/6x86MX(M2)
P54C
(Single Voltage)
AB
1
Intel P54C, IDT C6, AMD K5,
IBM/Cyrix 6x86
JP6 – CPU Core Voltage Selectors
EABCDF
ABCDEF
ABCDEF
ABCDEF
ABC ED F
E
ABCD F EFABCD
2.5V 3.2V
3.3V
3.5V2.9V
2.8V
(default)
Vcc Setting Vcc Setting
2.2V
Vcc Setting
* Make sure that the setting is set to Normal Mode before installing the
mainboard.
** The setting must be set to 3.3V position for all Synchronous DRAM.

14 Chapter 2
JP5 (A, B, C) – CPU Internal Clock Speed Selectors
1.5X/
3.5X
Internal Setting
CBA
4.0X
Internal Setting
CBA
2.0X
CBA
4.5X
CBA
2.5X
CBA
5.0X
CBA
CBA
5.5X3.0X
CBA
1
1
1
1
1
1
1
1
JP7 (A, B) – CPU External Clock Selectors
Clock Settings Clock Settings
60MHz
AB
75MHz
A B
66MHz
(default)
A B
83MHz
A B
JP9 – Sound Pro
Selector
Description Setting
Enabled
Disabled
J5 – MIC Type Selector
Description Setting
Standard
Special
Note: The CPU speed is equal to the CPU External Clock x CPU Internal Clock speed.

Hardware Configuration 15
Memory Installation
The mainboard lets you add up to 384MB of system
memory through SIMM and DIMM sockets on the
board. Four SIMM sockets on the mainboard are
divided into two banks: Bank 0 and Bank 1. Each bank
consists of two 72-pin SIMM modules and three 168-pin
DIMM sockets are divided into three banks: Bank 0,
Bank 1, and Bank 2. The mainboard supports the
following memory configurations.
Bank Memory Module
Bank 0
SIMM1 & SIMM2
DIMM1
2 x 4MB/8MB/16MB/32MB/64MB
or
4MB, 8MB, 16MB, 32MB, 64MB, 128MB
Bank 1
SIMM3 & SIMM4
DIMM2
2 x 4MB/8MB/16MB/32MB/64MB
or
4MB, 8MB, 16MB, 32MB, 64MB, 128MB
Bank 2
DIMM3 4MB, 8MB, 16MB, 32MB, 64MB, 128MB
Total System Memory = Bank 0 + Bank 1 + Bank 2
Notes: 1. The following two types of DRAM module can not be used at
the same time: SIMM 1 & 2 and DIMM1 or SIMM3 & 4
and DIMM2.
2. Use 2 DRAM types: FPM/EDO faster than 70ns for SIMM
socket.
3. Use 3 DRAM types: FPM/EDO/SDRAM faster than 70ns
for DIMM socket.

Chapter 3
ACPI Functions & Connectors
with ATX Power
PWR2 – ATX Power Connector
The ATX power supply provides a single 20-pin
connector and supports the ACPI specification.
Pin Description Pin Description
1 3.3V 11 3.3V
2 3.3V 12 Ð12V
3 Ground 13 Ground
4 +5V 14 PS-ON
5 Ground 15 Ground
6 +5V 16 Ground
7 Ground 17 Ground
8 Power OK 18 Ð5V
9 5VSB 19 +5V
10 +12V 20 +5V

ATX Functions & Connectors 17
The functions and connectors described below work
with the ATX power supply.
Software Power-Off
Follow the steps below to use the ÒSoftware Power-Off
ControlÓ function in Windows 95 with ATX power
supply.
1. Click the START button on the Windows 95 task
bar.
2. Select Shut Down The Computer to turn off the
computer. The message ÒIt is now safe to turn off
your computer.Ó will not be shown when using this
function.
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 Ring Resume
From Soft Off option is set to Enabled in the BIOS setup
section (Refer to the Power Management section in
Chapter 4.)
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 Resume From Soft Off option in
the BIOS Setup section will be set to Enabled.

18 Chapter 3
J2 (21, 22) (PWRBT) – 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.