MSI 482, Midas 482 User Manual

Midas 482

User’s Guide

Read the Safety Instruction before using the
computer. If you have any question, Please
ask the Professional Technician.

G52-B6295X1

FCC-B Radio Frequency Interference Statement

This equipment has been tested and found to comply with the limits for a class B
digital device, pursuant to part 15 of the FCC rules. These limits are designed to
provide reasonable protection against harmful interference when the equipment
is operated in a commercial environment. This equipment generates, uses and
can radiate radio frequency energy and, if not installed and used in accordance
with the instruction manual, may cause harmful interference to radio
communications. Operation of this equipment in a residential area is likely to
cause harmful interference, in which case the user will be required to correct
the interference at his own expense.

Notice 1

The changes or modifications not expressly approved by the party responsible
for compliance could void the user’s authority to operate the equipment.

Notice 2

Shielded interface cables and AC. power cord, if any, must be used in order to
comply with the emission limits.

VOIR LA NOTICE D’ INSTALLATION AVANT DE RACCORDER AU

Micro-Star International

Midas 482

This device complies with Part 15 of the FCC Rules. Operation is subject to the
following two conditions:

(1) this device may not cause harmful interference, and

(2) this device must accept any interference received, including interference
that may cause undesired operation.

ii

Trademarks

All trademarks are the properties of their respective owners.
Intel® and Pentium® are registered trademarks of Intel Corporation.
PS/2 and OS®/2 are registered trademarks of International Business Machines
Corporation.
Windows® 95/98/2000/NT/XP are registered trademarks of Microsoft Corporation.
Netware® is a registered trademark of Novell, Inc.
Award® is a registered trademark of Phoenix Technologies Ltd.
AMI® is a registered trademark of American Megatrends Inc.

Revision History

Revision Revision History Date

V1.0 First Release November 2005

Copyright Notice

The material in this document is the intellectual property of MICRO-STAR
INTERNATIONAL. We take every care in the preparation of this document, but

no guarantee is given as to the correctness of its contents. Our products are
under continual improvement and we reserve the right to make changes with­out notice.

iii

Safety Instructions

1. Always read the safety instructions carefully.

2. Keep this User’s Manual for future reference.

3. Keep this equipment away from humidity.

4. Lay this equipment on a reliable flat surface before setting it up.

5. The openings on the enclosure are for air convection hence protects the
equipment from overheating. DO NOT COVER THE OPENINGS.

6. Make sure the voltage of the power source and adjust properly 115/
230V before connecting the equipment to the power inlet.

7. Place the power cord such a way that people can not step on it. Do not
place anything over the power cord.

8. This product is not intended for installed by user, any installation should
be conducted by service personnel.

9. All cautions and warnings on the equipment should be noted.

10. Never pour any liquid into the opening that could damage or cause elec­trical shock.

11. If any of the following situations arises, get the equipment checked by a
service personnel:

- The power cord or plug is damaged.

- Liquid has penetrated into the equipment.

- The equipment has been exposed to moisture.

- The equipment has not work well or you can not get it work according
to User’s Manual.

- The equipment has dropped and damaged.

- The equipment has obvious sign of breakage.

12. Do not leave this equipment in an unconditioned environment with stor
age temperature above 600 C (1400F). Extreme heat may damage the
equipment.

13. This product can be operated at an ambient temperature 35 degree
centigrate.

14. Input Rating: 100~127 Vac, 50~60Hz, 6.0A 200~240Vac, 50~60Hz, 3.0A.

15. Caution: CLASS 1 LASER PRODUCT / KLASSE 1 LASER APPARAT,
when DVD/CD-ROM was provided.

CAUTION: Danger of explosion if battery is incorrectly replaced.
Replace only with the same or equivalent type recommended by the

manufacturer.

iv

WEEE Statement

v

vi

vii

CONTENTS

Chapter 1. Getting Started........................................................................1-1

1.1 System Specifications..................................................................1-2

1.2 System Configuration....................................................................1-4

1.3 Thermal Solution............................................................................1-7

Chapter 2. Introducing Mainboard...........................................................2-1

2.1 Mainboard Layout.......................................................................2-2

2.2 CPU................................................................................................2-3

2.3 Memory..........................................................................................2-5

DIMM Module Combination..........................................................2-5

Installing DDR Modules..............................................................2-6

2.4 Power Supply................................................................................2-7

ATX 24-Pin Power Connector: ATX1.........................................2-7

ATX 8-pin CPU Power Connector: JPW1..................................2-7

2.5 Front Panel.....................................................................................2-8

Audio Ports..............................................................................2-8

USB Ports................................................................................2-8

2.6 Rear Panel.....................................................................................2-9

USB Ports..................................................................................2-9

Mouse/Keyboard Connectors................................................2-10

Audio Port Connectors & Audio Header (J1)..........................2-10

RJ-45 LAN Jack........................................................................2-11

VGA Port..................................................................................2-11

Parallel Port...............................................................................2-12

2.7 Connectors...............................................................................2-13

Floppy Disk Drive Connector: FDD1.........................................2-13

Fan Power Connectors: CPU_FAN/SYS_FAN........................2-13

ATA133 Hard Disk Connectors: IDE1 & IDE2...........................2-14

Serial ATA Connectors: SATA1, SATA2, SATA3, SATA4.........2-15

CD-in Connector: JCD1.............................................................2-16

Front Panel Audio Connector: JAUD1......................................2-16

Chassis Intrusion Switch Connector: JCI1...............................2-16

SPDIF-Out/SPDIF-In Connector: SPDOUT/SPDIN......................2-17

Audio-out Connector: J1...........................................................2-17

Serial Port Header: COM1 (Optional) .......................................2-18

TV-Out Connector: JTV1 (Optional)........................................2-18

Front Panel Connector: JFP1...................................................2-19

viii

Front USB Connectors: JUSB1, JUSB2...................................2-19

2.8 Jumper.........................................................................................2-20

Clear CMOS Jumper: JCMOS.................................................2-20

2.9 Slot...............................................................................................2-21

PCI (Peripheral Component Interconnect) Express Slots.......2-21

PCI (Peripheral Component Interconnect) Slots.......................2-21

Chapter 3. System Assembly....................................................................3-1

3.1 Overview.......................................................................................3-2

Installation Tools.........................................................................3-2

Screws.......................................................................................3-2

Checking the Items.....................................................................3-3

3.2 Installation Procedures.................................................................3-4

1. Removing Cover, Drive Cage................................................3-4

2. Installing Memory Modules.....................................................3-5

3. Installing CPU..........................................................................3-6

4. Installing CPU Cooler..............................................................3-7

5. Installing HDD..........................................................................3-8

6. Installing FDD and Optical Drive............................................3-9

7. Adjusting ODD Button Key...................................................3-11

8. Restoring Chassis Cover.....................................................3-12

Chapter 4. BIOS Setup...................................................................................4-1

Entering Setup.................................................................................4-2

Control Keys............................................................................4-2

Getting Help..............................................................................4-3

General Help <F1>....................................................................4-3

The Menu Menu................................................................................4-4

Standard CMOS Features.................................................................4-6

Advanced BIOS Features.................................................................4-8

Advanced Chipset Features............................................................4-10

Integrated Peripherals......................................................................4-12

Power Management Setup...............................................................4-15

PNP/PCI Configurations......................................................................4-18

PC Health Status...............................................................................4-21

Cell Menu.........................................................................................4-23

Load Fail-Safe/Optimized Defaults..................................................4-25

BIOS Setting Password...................................................................4-26

Chapter 5. Introduction to Audio: Realtek ALC880................................5-1

ix

Installing the Audio Driver..................................................................5-2

Installation for Windows 2000/XP.............................................5-2

Software Configuration.....................................................................5-4

Sound Effect...............................................................................5-5

Mixer...........................................................................................5-8

Audio I/O...................................................................................5-12

Microphone...............................................................................5-17

3D Audio Demo.........................................................................5-18

Information................................................................................5-19

Using 2-, 4-, 6- & 8- Channel Audio Function.................................5-20

x

1

Getting Started

Congratulations for purchasing Midas 482
(MS-6295) barebone. Midas barebone is your best
Slim PC choice. With the fantastic appearance
and small form factor, it can easily be set
anywhere. The feature packed platform also gives
you an exciting PC experience.

1.1 System Specifications

CPU

† Supports 64-bit AMD® Athlon 64 and Athlon 64 FX/ Athlon 64 X2 (dual core)

processor (Socket 939)

† Supports up to 4000+ Athlon 64/ 64 FX, or higher CPU

(For the latest information about CPU, please visit http://www.msi.com.tw/
program/products/slim_pc/slm/pro_slm_cpu_support.php)

Chipset

† ATI® RS482 Chipset

- HyperTransportTM connection to AMD K8 Athlon64 processor

- 8 or 16 bit control/address/data transfer both directions

- 1000/800 MHz “Double Data Rate” operation both direction

- Compliant with PCI Express 1.0a specifications (one x16 graphics
interface, which can be divided into two smaller links for use by other
devices)

- Graphic integrated

† ATI® SB450 Chipset

- Supports dual channel native SATA controller up to 150MB/s with RAID 0 or

1

- Supports HD Audio

- Ultra DMA 66/100/133 master mode PCI EIDE controller

- ACPI & PC2001 compliant enhanced power management

- Supports USB2.0 up to 8 ports

Main Memory

† Supports dual channel, eight memory banks DDR 333/400, using four 184-

pin DDR DIMMs

† Supports a maximum memory size up to 4GB without ECC
† Supports 2.5v DDR SDRAM DIMM

Slots

† One PCI Express x16 slot (supports PCI Express Bus specification v1.0a

compliant)

† One PCI Express x1 slot (supports PCI Express Bus specification v1.0a

compliant)

† Two 32-bit Master 3.3V/5V PCI Bus slots

Onboard IDE

† An IDE controller on the ATI® SB450 chipset provides IDE HDD/CD-ROM with

PIO, Bus Master and Ultra DMA 133/100/66 operation modes

† Can connect up to 4 IDE devices

Onboard Serial ATA

† Supports 4 SATA ports with up to 150MB/s transfer rate

USB Interface

1-2

Chapter 1 - Getting Started

† 8 USB ports

- 4 ports in the rear I/O, 4 ports via the external bracket

LAN

† Realtek® 8100C or 8110S LAN chip

- Integrated Fast Ethernet MAC and PHY in one chip

- Supports 10Mb/s, 100Mb/s and 8110S supports up to 1000Mb/s.

- Compliance with PCI v2.2

- Supports ACPI Power Management

IEEE 1394 (Optional)

† VIA® 6307 IEEE 1394 controller

- Supports up to two 1394 ports (rear panel x 1, pinheader x 1).

- Transfer rate is up to 400Mbps

Audio

† Azalia link controller integrated in SB450 chipset.
† 8-channel audio codec Realtek ALC880

- Compliance with HD Audio (Azalia) 1.0 spec

On-Board Peripherals

† On-Board Peripherals include:

- 1 floppy port supports 1 FDD with 360K, 720K, 1.2M, 1.44M and 2.
88Mbytes

- 1 serial pinheader (Optional)

- 1 VGA port

- 1 DVI port (optional)

- 1 JTV1 pinheader

- 1 parallel port supporting SPP/EPP/ECP mode

- 6 USB2.0 ports (Rear*4/Front*2)

- 1 Audio (Line-In/Line-Out/MIC 3 in 1) connector

- 1 RJ-45 LAN Jack

- 2 IEEE1394 Ports (Rear * 1 / Front * 1) (Optional)

BIOS

† The mainboard BIOS provides “Plug & Play” BIOS which detects the

peripheral devices and expansion cards of the board automatically.

† The mainboard provides a Desktop Management Interface (DMI) function

which records your mainboard specifications.

† Supports boot from LAN, USB Device 1.1 & 2.0, and SATA HDD.

Dimension

† Micro-ATX Form Factor: 24.4cm X 24.4cm

Mounting

† 8 mounting holes

1-3

1.2 System Configuration

Front View

1.2 x USB 2.0 Ports

2.Mic-in (pink), Line-out (green)

3.HDD LED

4.Power LED

5.Power Switch

6.FDD (optional)

7.Optical Drive (optional)

8.Optical Drive Eject/
Close Button

1-4

Rear View

Chapter 1 - Getting Started

1. PS/2 Mouse 9. AC Input Voltage Selector

2. PS/2 Keyboard 10. Parallel Port

3. VGA Port 11. RJ-45 LAN Jack

4. 4 x USB 2.0 Ports 12. Line-out

5. Mic-in 13. Line-in

6. PCI Express x16 Slot 14. Chassis Locks

7. PCI Express x1 Slot 15. Power Jack

8. PCI Slots

1-5

Chassis Design

† Dimension: 335mm (H) x 98mm (W) x 363mm (D)
† Minimized screw structure
† Detachable bay housing

† Multiple ventilation holes

1. CPU Fan Ventilation Hole 5. System Ventilation Hole

2. CPU Fan Ventilation Hole 6. System Ventilation Hole

3. System Fan Ventilation Hole 7. Front I/O Release Button

4. Power Supply Ventilation Hole

1-6

Chapter 1 - Getting Started

1.3 Thermal Solution

To prevent the system from overheating, we have adopted a specially

designed CPU cooler and multiple ventilation holes for better cooling effects.

Power
Supply Fan

Power
Supply

Ventilation Hole

Ventilation
Hole

System
Fan

Ventilation
Hole

front panel

1-7

System Air Flow Direction

Power
Supply
Fan

Power
Supply

System Fan

front panel

After the installation is completed, please keep
other objects away from the ventilation hole at
least 2.5cm and above. Do not block the venti­lation hole.

1-8

2

Mainboard Hardware

This chapter tells you how to install the CPU,
memory modules, and expansion cards, as well as
how to setup the jumpers on the mainboard. Also, it
provides the instructions on connecting the periph­eral devices, such as the mouse, keyboard, etc.

While doing the installation, be careful in hold­ing the components and follow the installation
procedures.

2.1 Mainboard Layout

I

DE

1ID

E 2FD

D

1ATX 1

JCI

2

D

I

MM1DI

MM3DI

MM2DI

MM4

CPU_FAN

JUSB2

JLPC1

JUSB1

BIOS

Top : mouse
Bottom: keyboard

JCOM2

Top :
Parallel Port

Bottom:
VGA port

Top: LAN jack
Bottom: USB ports

USB ports

T:Line-In
M:Line- Out
B:Mic-In

LAN
Chip

ALC880

JAUD1

SYS_FAN

J1

JPW1

JTV1

PCIE16X1

PCIE1X1

ATI Rs482

PCI1

PCI 2

JCD1

SPDOUTSPDIN

JCMOS

Midas 482 (MS-7191 v1.X)

M-ATX Mainboard

VIA

VT6307

ATI

SB450

BATT

+

JFP1

SATA1 SATA3

SATA2 SATA4

2-2

Chapter 2 - Mainboard Hardware

2.2 CPU

The mainboard supports AMD® Athlon64 processor. The mainboard
uses a CPU socket called Socket-939 for easy CPU installation. When you are
installing the CPU, make sure the CPU has a heat sink and a cooling fan
attached on the top to prevent overheating. If you do not have the heat
sink and cooling fan, contact your dealer to purchase and install them before
turning on the computer.

For the latest information about CPU, please visit http://www.msi.com.tw/
program/products/mainboard/mbd/pro_mbd_cpu_support.php.

MSI Reminds You...

Overheating

Overheating will seriously damage the CPU and system, always
make sure the cooling fan can work properly to protect the CPU
from overheating.

Replacing the CPU

While replacing the CPU, always turn off the ATX power supply or
unplug the power supply’s power cord from grounded outlet first
to ensure the safety of CPU.

2-3

CPU Installation Procedures for Socket 939

Gold arrow

Gold arrow

Gold arrow

Correct CPU placement

O

1.Please turn off the power and

unplug the power cord before
installing the CPU.

2.Pull the lever sideways away
from the socket. Make sure to
raise the lever up to a 90­degree angle.

3.Look for the gold arrow of the
CPU. The gold arrow should
point as shown in the picture.
The CPU can only fit in the
correct orientation.

4.If the CPU is correctly installed,
the pins should be completely
embedded into the socket and
can not be seen. Please note
that any violation of the correct
installation procedures may
cause permanent damages to
your mainboard.

Sliding

Plate

Open Lever

90 degree

5. Press the CPU down firmly into
the socket and close the lever.
As the CPU is likely to move
while the lever is being closed,
always close the lever with
your fingers pressing tightly on
top of the CPU to make sure the
CPU is properly and completely
embedded into the socket.

2-4

Chapter 2 - Mainboard Hardware

2.3 Memory

The mainboard provides 4 slots for 184-pin DDR DIMM (Double In-Line
Memory Module) modules and supports the memory size up to 4GB. You can
install DDR 333/400 modules on the DDR DIMM slots (DIMM 1~4).

DIMM1~DIMM4

(from left to right)

DIMM Module Combination

Install at least one DIMM module on the slots. Each DIMM slot supports up
to a maximum size of 1GB. Users can install either single- or double-sided
modules to meet their own needs. Users may install memory modules of different
type and density on different-channel DDR DIMMs. However, memory modules
of the same type and density are required while using dual-channel DDR, or
instability may happen.

GREEN Slots PURPLE Slots

DIMM1 (CH A) DIMM3 (CH A) DIMM2 (CH B)DIMM4 (CH B) Mode
128MB~1GB 128MB~1GB Dual Channel

128MB~1GB 128MB~1GB Dual Channel

128MB~1GB 128MB~1GB 128MB~1GB 128MB~1GB Dual Channel

MSI Reminds You...

- In dual-channel mode, make sure that you install memory mod­ules of the same type and density on DDR DIMMs.

- To enable successful system boot-up, always insert the memory
modules into the DIMM1 slots first.

- This mainboard DO NOT support the memory module in­stalled with more than 18 pieces of IC (integrated circuit).

- Do not support three memory modules.

2-5

Installing DDR Modules

1. The DDR DIMM has only one notch on the center of module. The module
will only fit in the right orientation.

2. Insert the DIMM memory module vertically into the DIMM slot. Then push it
in until the golden finger on the memory module is deeply inserted in the
socket.

3. The plastic clip at each side of the DIMM slot will automatically close.

Volt

Notch

2-6

Chapter 2 - Mainboard Hardware

2.4 Power Supply

The mainboard supports ATX power supply for the power system. Before
inserting the power supply connector, always make sure that all components
are installed properly to ensure that no damage will be caused.

ATX 24-Pin Power Connector: ATX1

This connector allows you to connect an ATX 24-pin power supply. To
connect the ATX 24-pin power supply, make sure the plug of
the power supply is inserted in the proper orientation and the
pins are aligned. Then push down the power supply firmly into
the connector.

You may use the 20-pin ATX power supply as you like.
If you’d like to use the 20-pin ATX power supply, please plug
your power supply along with pin 1 & pin 13 (refer to the
image at the right hand). There is also a foolproof design on
pin 11, 12, 23 & 24 to avoid wrong installation.

Pin Definition

pin 13

pin 12

PIN SIGNAL

13 +3.3V
14 -12V
15 GND
16 PS-ON#
17 GND
18 GND
19 GND
20 Res
21 +5V
22 +5V
23 +5V
24 GND

ATX1

13

24

1

12

PIN SIGNAL

1 +3.3V
2 +3.3V
3 GND
4 +5V
5 GND
6 +5V
7 GND
8 PWR OK
9 5VSB
10 +12V
11 +12V
12 NC

ATX 12V Power Connector: JPW1

This 12V power connector is used to provide power to the CPU.

Pin Definition

JPW1

2

1
34

PIN SIGNAL

1 GND
2 GND
3 12V
4 12V

MSI Reminds You...

1. These two connectors connect to the ATX power supply and have
to work together to ensure stable operation of the mainboard.

2. Power supply of 350 watts (and above) is highly recommended
for system stability.

3. ATX 12V power connection should be greater than 18A.

2-7

2.5 Front Panel

USB Ports

Line-outMic-in

Audio Ports

These audio ports allow you to connect front audio devices.

MIC-in

Line-out

USB Ports

The mainboard provides a UHCI (Universal Host Controller Interface)

Universal Serial Bus root for attaching USB devices such as keyboard, mouse or
other USB-compatible devices. You can plug the USB devices directly into these
connectors.

USB Port Description

PIN SIGNAL DESCRIPTION

1 VCC +5V
2 -Data 0 Negative Data Channel 0
3 +Data0 Positive Data Channel 0
4 GND Ground
5 VCC +5V
6 -Data 1 Negative Data Channel 1
7 +Data 1 Positive Data Channel 1
8 GND Ground

2-8

2.6 Rear Panel

The Rear Panel provides the following connectors:

Parallel

Mouse

Chapter 2 - Mainboard Hardware

L-In

LAN

Keyboard

VGA Port

USB

Ports

USB

Ports

USB Ports

The mainboard provides a UHCI (Universal Host Controller Interface)

Universal Serial Bus root for attaching USB devices such as keyboard, mouse or
other USB-compatible devices. You can plug the USB device directly into the
connector. The mainboard supports USB1.1 & 2.0 devices.

USB Port Description

1 2 3 4

5 6 7 8

USB Ports

PIN SIGNAL DESCRIPTION

1 VCC +5V
2 -Data 0 Negative Data Channel 0
3 +Data0 Positive Data Channel 0
4 GND Ground
5 VCC +5V
6 -Data 1 Negative Data Channel 1
7 +Data 1 Positive Data Channel 1
8 GND Ground

L-Out

Mic

2-9

Mouse/Keyboard Connectors

The mainboard provides two standard PS/2® mini DIN connectors for

attaching PS/2® mouse and keyboard.

PIN SIGNAL DESCRIPTION

PS/2 Mouse (6-pin Female)

6

4

5

3

2

1

1 Mouse DATA Mouse DATA
2 NC No connection
3 GND Ground
4 VCC +5V
5 Mouse Clock Mouse clock
6 NC No connection

Mouse Pin Definition

6

4

2

PS/2 Keyboard (6-pin Female)

5

3

1

PIN SIGNAL DESCRIPTION

1 Keyboard DATA Keyboard DATA
2 NC No connection
3 GND Ground
4 VCC +5V
5 Keyboard Clock Keyboard clock
6 NC No connection

Keyboard Pin Definition

Audio Port Connectors & Audio Header (J1)

The 3 audio jacks are for 2-channel mode for stereo speaker output: Line

Out is a connector for Speakers or Headphones. Line In is used for external CD

player, Tape player, or other audio devices. Mic is a connector for microphones.

However, there is an advanced audio application provided by Realtek
ALC880 to offer support for 7.1-channel audio operation. You can use the
external audio cable and the rear audio connectors to function the 2-/4-/5.1-/7.

1- channel audio.

Line In

Rear Out

Line Out

MIC

MSI Reminds You...

For the advanced functions of the audio codec, please refer to 5:
Introduction to Audio: Realtek ALC880 for details.

Center and Subwoofer Out

Side Surround Out

2-10

Chapter 2 - Mainboard Hardware

RJ-45 LAN Jack

The mainboard provides two standard RJ-45 jacks for connection to

Local Area Network (LAN). You can connect a network cable to the LAN jack.
This LAN enables data to be transferred at 100 or 10Mbps.

10/100Mbps LAN Jack Pin Definition

PIN SIGNAL DESCRIPTION

1 TDP Transmit Differential Pair
2 TDN Transmit Differential Pair
3 RDP Receive Differential Pair

8 1

RJ45 LAN Jack

4 NC Not Used
5 NC Not Used
6 RDN Receive Differential Pair
7 NC Not Used
8 NC Not Used

VGA Port

The mainboard provides one DB 15-pin female connector to connect a

VGA monitor.

5 1

15 11

DB 15-Pin Female Connector

VGA Port Pin Definition

PIN SIGNAL DESCRIPTION

1 Red
2 Green
3 Blue
4 Not used
5 Ground
6 Ground
7 Ground
8 Ground
9 Power
10 Ground
11 Not used
12 SDA
13 Horizontal Sync
14 Vertical Sync
15 SCL

2-11

Parallel Port

The mainboard provides a 25-pin female centronic connector as LPT. A
parallel port is a standard printer port that supports Enhanced Parallel Port (EPP)
and Extended Capabilities Parallel Port (ECP) mode.

13 1

25

14

Pin Definition

PIN SIGNAL DESCRIPTION

1 STROBE Strobe
2 DATA0 Data0
3 DATA1 Data1
4 DATA2 Data2
5 DATA3 Data3
6 DATA4 Data4
7 DATA5 Data5
8 DATA6 Data6
9 DATA7 Data7
10 ACK# Acknowledge
11 BUSY Busy
12 PE Paper End
13 SELECT Select
14 AUTO FEED# Automatic Feed
15 ERR# Error
16 INIT# Initialize Printer
17 SLIN# Select In
18 GND Ground
19 GND Ground
20 GND Ground
21 GND Ground
22 GND Ground
23 GND Ground
24 GND Ground
25 GND Ground

2-12