VIA Mainboard 845D-MVT User manual
The 845D-MVT MAINBOARD Page 1
845D
845D845D
845D-
--
-MVT
MVTMVT
MVT
Mainboard
MainboardMainboard
Mainboard
SOCKET 478 DDR Micro-ATX
Mainboard
Version 1.x
UM-845D-MVT-E1
Rev 1.0V
Creation Date: 27 November 2002
The 845D-MVT MAINBOARD
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The 845D-MVT MAINBOARD Page 3
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Table Of Contents
The 845D-MVT MAINBOARD
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Table Of Contents
The 845D-MVT MAINBOARD Page 5
Introduction
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
(10)
(11)
(12)
(13)
(14)
(15)
(16) (17)
(18)
(19)
(20)
(21)
(22)
(1) (2) IDE1,IDE2 Connectors. page 14 (12) PCI1,PCI2,PCI3 page 13
(3) AGP Slot. page 14 (13) (14) CD-IN, AUX-IN page 16
(4) PW, HL, RS. page 18 (15) FAN2 page 15
(5) PWRLED, SPKR. page 19 (16) Front Audio Connector page 16
(6) FAN3. page 15 (17) PC99 ATX connectors page 19
(7) Clear Password. page 21 (18) Power Supply Connectors page 15
(8) Clear CMOS. page 21 (19) KB/MS PWR-ON page 21
(9) USB3, USB4. page 17 (20) FAN1 page 15
(10) WOL Connector. page 16 (21) CPU Socket page 12
(11) FDD Connector. page 14 (22) DIMM1, DIMM2 page 13
The 845D-MVT MAINBOARD
Page 6
1.2.1. The 845D-MVT Mainboard
The 845D-MVT mainboard is a Pentium™ 4 DDR platform. It supports a maxi-
mum memory of 2GB and comes with 4 USB (vesion 1.1) ports. Onboard it
has three PCI slots, one 1x/2x/4x AGP slot (which only supports 1.5V AGP
cards), and an Onboard Audio (AC’97 2 channels). It also comes with three
fan connectors (for additional thermal protection) and three power supply con-
nectors. It also has a WOL (Wake-On-Lan) connector that enables it to be
“woken up” from a soft-off power state when it receives a signal from the LAN.
Other onboard connectors include Aux-IN and CD-IN connectors.
1.2.2. Mainboard Dimensions
Width 244 mm
Length 215 mm
1.2.3. Environmental Limitations
Operating Temperature: 10°C to 40°C (50°F to 104°F)
Required Airflow: 50 linear feet per minute across the CPU
Storage Temperature: -40°C to 70°C (-40°F to 158°F)
Humidity: 0 to 90% non-condensing
Altitude: 0 to 10 000 feet
Introduction
PC99 ATX Connectors
CN2: PS2 Mouse
CN1: PS2 Keyboard
CN5: LPT CN18: Game/Midi
CN7: USB2
CN6: USB1 CN4: COM2
CN3: COM1 SPK OUT
LINE IN
MIC
Processor
The mainboard supports Socket 478 Intel®PentiumTM4 and CeleronTM CPUs.
Chipset
Northbridge Core Chipset: Intel® RG82845
Southbridge Core Chipset: Intel®FW82801
I/O Chipset
Winbond W83627HF-AW
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The 845D-MVT MAINBOARD Page 7
Introduction
CPU Switching Voltage regulator
This mainboard is equipped with a switching voltage regulator that automati-
cally detects a DC power supply from +1.10V to +1.85V.
System Memory
The mainboard uses Double Data Rate Dual Inline Memory Modules (DDR
DIMM). It has two 184-pin DIMM sockets. These sockets support 2.5V (power
level) single-sided or double sided PC1600 (DDR200) or PC2100 (DDR266)
DDR DIMM modules. The maximum memory supported by the mainboard is 2
GB.
Note: The system memory supports 64 Mb, 128 Mb, 256 Mb and 512 Mb tech-
nologies for x8 and x16 devices. (Double-sided x16 devices are not supported)
Expansion Slots
The mainboard is equipped with three dedicated PCI slots and one 1x/2x/4x
AGP slot (which only supports 1.5V AGP cards).
Onboard Audio Features
Supports Microsoft DirectSound/DirectSound 3D and AC97 Full Duplex.
Word Size
!Data Path: 8-bit, 16-bit, 32-bit, 64-bit
!Address Path: 32-bit
Front Side Bus Frequency (FSB)
P4 Socket 478 CPU at 400 MHz PSB (Processor System Bus) (100 MHz QDR) is
supported.
BIOS
!Award BIOS, Windows 95/98 Plug and Play (PnP) compatible.
!Supports SCSI sequential boot-up.
!Flash EPROM for easy BIOS upgrades.
!Supports DMI 2.0 function
Desktop Management Interface (DMI)
The mainboard comes with DMI 2.0 built into the BIOS. The DMI utility in the
BIOS will automatically record different information about your system
configuration and store this information in the DMI pool, which is a part of the
system board's Plug and Play BIOS. DMI, along with the appropriately
networked software, is designed for easy inventory, maintenance and the
simplified troubleshooting of computer systems.
WOL (Wake-On-LAN) Port
One WOL connector supports Wake-On-LAN functionality.
The 845D-MVT MAINBOARD
Page 8
Introduction
USB Ports
USB allows data exchange between your computer and a wide range of
simultaneously accessible external Plug and Play peripherals. The 845D-MVT
mainboard is equipped with four USB connectors. USB 1 and USB 2 are
external connectors. They can be found on the PC 99 ATX connector. The other
USB connectors are internal connectors and can be used to connect other USB
devices. (Cables for the internal connectors are sold separately).
Note: The internal USB connectors (CN30 and CN31) are non-standard. When
you purchase the cable please ensure that the connector on one side of the
cable is compatible with the internal USB connector and the connector on the
other side of the cable is a standard USB connector.
Connectors
!Two IDE connectors
!One floppy drive interface supports up to two 2.88 MB floppy drives
!One 20-pin ATX power supply connector
!One 4-pin (2x2) 12V ATX power supply connector
!One 4-pin (1x4) ATX Auxiliary power supply connector
!One CPU fan and two Chassis fan connectors
!One CD audio in connector
!One AUX-IN connector
!One front audio connector
!One WOL (Wake-On-LAN) connector
!One 4 CH OUT Connector (Optional)
ATX Double Deck Ports (PC99 color-coded connectors)
!Two USB ports
!Two external DB-9 serial port connector: COM1 and COM2 (UART)
!One VGA connector
!One SPP/ECP/EPP DB-25 parallel port
!One mini-DIN-6 PS/2 mouse port
!One mini-DIN-6 PS/2 keyboard port
!One GAME/MIDI port
!Three audio jacks: SPK-OUT, LINE-IN and MIC-IN
PCI Bus Master IDE Controller
!Two PCI IDE interfaces support up to four IDE devices.
!Supports ATA/33, ATA/66 and ATA/100 hard drives.
!PIO Mode 3 and Mode 4 Enhanced IDE (data transfer rate up to 16.6
MB/sec.).
!Bus mastering reduces CPU utilization during disk transfer.
!Supports ATAPI CD-ROM, LS-120 and ZIP.
The 845D-MVT MAINBOARD Page 9
Introduction
The mainboard is capable of monitoring the following health conditions of your
system:
1. Processor temperature. It has an overheat alarm.
2. VCORE/3.3V/5V/12V/-12V voltages and failure alarm.
3. Processor and chassis fan speeds. It has a failure alarm for these fans.
4. Read back capability that displays temperature, voltage and fan speed.
1.4.1. Hardware Monitoring System Utility
The mainboard comes with the Hardware Monitoring System utility contained
on the CD. It is capable of monitoring the systems hardware conditions such
as the temperature of the processor, voltage, and the speed of both the CPU
and chassis fans. You are allowed to manually set a range to the items being
monitored. We recommend that you use the Default Settings, which are the
ideal settings that will maintain the system in a good working condition.
1.4.2. Installation
To install this utility, please insert the CD into the CD-ROM drive. The auto run
screen (Driver Utility) will automatically appear. Click the Hardware Monitoring
button, choose the chipset, model number and the OS that is installed. Please
refer to the CD “Readme” file for further installation instructions.
Note: Only use this utility in Windows operating systems.
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Dual Function Power Button
Depending on the setting in the Soft-Off By Power-Button field of the Power
Management Setup, this switch allows the system to enter the Soft-Off or
Suspend mode.
RTC Timer to Power-on the System
The RTC installed on the system board allows your system to automatically
power-on at a set date and time.
Wake-On-LAN Ready
The Wake-On-LAN function allows the network to remotely wake up a Soft
Power Down (Soft-Off) PC. Your LAN card must support the remote wakeup
function. The 5V SB power source of your power supply must be at least
720mA.
ACPI Ready
The mainboard is designed to meet the ACPI (Advanced Configuration and
Power Interface) specification. ACPI has energy saving features that support
OS Direct Power Management (OSPM) for round the clock PC operation.
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The 845D-MVT MAINBOARD
Page 10
Hardware Installation
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The 845D-MVT MAINBOARD Page 11
The following is a checklist of all the expansion slots, jumpers and connectors
that should be configured on your mainboard before you can run your PC.
Hardware Installation
*!(-!
Installation Checklist
Expansion Slots and Sockets
CPU Socket
DIMM Slots
PCI Slots
Socket 478 Intel®Pentium™ 4 and CeleronTM CPUs.
Two 184-pin slots that supports up to 2 GB of DDR SDRAM.
Three 32-bit PCI slots.
Internal Connectors
CN8
CN9
CN10
CN13
CN15-A
CN15-B
CN15-D
CN16
CN17
CN21
CN27
CN30/31
CN39
CN45
Floppy Disk Drive
Primary IDE
Secondary IDE
CPU Fan
ATX Power Supply
ATX 12V Power Supply
Auxiliary ATX 12V Power Supply
Wake-On-LAN
Chassis Fan 1
CD Audio In
Chassis Fan 2
Universal Serial Bus 3/4
Front Audio Connector
Auxiliary In
FDC
IDE1
IDE2
FAN1
ATX
ATX12V
AUX12V
WOL
FAN2
CD-IN
FAN3
USB3/4
FRONT AUDIO
AUX-IN
External Connectors
CN1
CN2
CN3
CN4
CN5
CN6/7
CN18
PS/2 Keyboard Connector
PS/2 Mouse Connector
Serial Port 1
Serial Port 2
Parallel Port
Universal Serial Port 1/2
Game/MIDI Port
KB
MS
COM1
COM2
LPT
USB1/2
GAME/MIDI
System Panel Buttons and Connectors
PW
HL
RS
Power On/Off and Suspend Switch Connector
HDD LED Connector
Reset Button Connector
The 845D-MVT MAINBOARD
Page 12
*!"#!
Hardware Installation
Speaker and Power LED Connectors
PWR-LED
SPK Power LED
Speaker Connector
Jumpers and Switches
JP1
JP3
JP4
KB/MS Power On
Clear CMOS
Clear Password
Note: Before you start installing your mainboard we strongly recommend that you
use a grounded anti-static mat. We further recommend that you attach an anti-static
wristband, which is grounded at the same location as the mat to your wrist.
You need to complete the following installation steps before you use your PC.
!Check and set the mainboard settings.
!Install the Central Processing Unit (CPU).
!Install the memory modules.
!Install the expansion cards.
!Connect the ribbon cables, panel wires and power supply.
!Setup the system BIOS
2.4.1. Installation of the CPU
To install your processor, please complete the following set of instructions
1. Locate a small dot marked on the top of the CPU. This mark indicates
Pin 1 of the CPU.
2. Locate Pin 1 for the Socket on the mainboard.
3. There is a lever on the side of the socket. First push this lever side-
ways and then lift it to a 90-degree angle.
4. Insert the CPU into the Socket. Please make sure that Pin 1 for the
CPU is inserted into Pin 1 of the Socket.
5. When the CPU is installed correctly push the lever back into place.
6. Install a proper heat sink with cooling fan for proper heat dissi-
pation. Failing to install a heat sink with cooling fan may cause over-
heating which will burnout your CPU and damage your mainboard.
IMPORTANT: CPU COOLING FAN
Please ensure that you have an approved heat sink with cooling fan. Without a proper
heat sink with cooling fan you will damage both the mainboard and the CPU.
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The 845D-MVT MAINBOARD Page 13
2.4.2. Memory Modules
The mainboard has two 184-pin DDR DIMM slots and are able to support a
maximum memory of 2 GB. The DDR DIMM slots are located on the right hand
side of the board. To install the DIMM’s into these slots, make sure the white
lever at each side of the slot has been pulled down to an angle of
approximately 45°. Make sure that the DIMM is in the correct orientation.
Place the DIMM on the slot and push down firmly.The white levers will come
back up and lock the module in place.
Note: The system memory supports 64 Mb, 128 Mb, 256 Mb and 512 Mb tech-
nologies for x8 and x16 devices (Double-sided x16 devices are not supported).
Hardware Installation
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Top View of a 184-pin DIMM Slot
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2.4.3. PCI Slots
The mainboard comes with three PCI slots. They are located on the left hand
side of the board. Both PCI and PCI expansion cards may require IRQ’s. This
mainboard complies with Plug and Play (PnP) specifications. Whenever a PnP
compliant card is added the system will automatically be configured and the
IRQ’s will be assigned automatically. When you are inserting your PCI card
make sure that the pins are correctly aligned. When the pins are properly
aligned with the hole’s in the slot, push down gently.
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Top View of a 32-bit PCI Slot
The 845D-MVT MAINBOARD
Page 14
Hardware Installation
2.5.1. Floppy Disk Connector
Connector: CN8 (FDC)
Type: 34 pin block
The FDC connector can support two floppy drives. It is located at the front of
the mainboard. To connect, use the ribbon-cable that has been provided.
Make sure that the red strip is connected to PIN 1 of the connector.
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Top View of a Floppy
Disk Drive Connector
2.5.2. Primary and Secondary IDE connectors
Connector: CN9 (IDE1)/CN10 (IDE2)
Type: 40 pin block
The mainboard has two IDE connectors: a primary and secondary. Each IDE
connector can support two IDE drives. These mainboards can therefore sup-
port up to four IDE devices each. If you install two hard drives, you need to
configure the second drive to slave mode in the BIOS setup. Please refer to
your hard drive manual for the appropriate jumper settings.
Top View of an
IDE Connector
20 PINS
PIN 1
2.4.4. AGP Slot
AGP (Accelerated Graphics Port) is a dedicated bus slot. It operates at 66 MHz
and transfers data at a rate up to 1066 MB/s. This allows 3D applications to
run more smoothly. The mainboard comes with a 1.5V AGP slot. This slot is
able to support 1x/2x and 4x (1X is 266 MB/s, 2X is 533 MB/s; and 4X pro-
vides 1066 MB/s) AGP cards.
Top View of an AGP Slot
21 pins 41 pins
The 845D-MVT MAINBOARD Page 15
2.5.4. ATX Power Supply Connectors
Connector: CN15-A/CN15-B/CN15-D
Type: 2x10/2x2/1x4
The mainboard comes with three onboard
power supply connectors labeled CN15-A,
CN15-B and CN15-D. CN15-A and CN15-B
are regular ATX power supply connectors.
The auxiliary power supply connector
(CN15-D) is for a +12V and +5V power
supply. These increased power supplies
are necessary to provide extra power for
the slot. The ATX 12V power supplies are
all downward compatible with standard
ATX power supplies. Plug in CN15-D as
long as you find out your power supply
without ATX12 (CN15-B) connection.
Otherwise it is no necessary to use
CN15-D (AUX12V).
2.5.3. CPU Fan and Chassis Fan Connectors
Connector: CN13 (FAN1)/CN17 (FAN2)/CN27 (FAN3)
Type: 3 pin
The cooling fans must be connected to their respective power connectors. If
you have installed the hardware-monitoring feature you will be able to monitor
the rotating speed of the CPU cooling fan in your Windows operating system.
Hardware Installation
Pin 1 Pin 11
+3.3VDC
+3.3VDC
COM
+5VDC
COM
+5VDC
COM
PWR_OK
+5VSB
+12VDC
+3.3VDC
-12VDC
COM
PS_ON#
COM
COM
COM
-5VDC
+5VDC
+5VDC
ATX Power Supply Connector
Pin 1 Pin 3
COM
COM
+12VDC
+12VDC
ATX12V Power Supply Connector Auxiliary Power Supply Connector
Pin 4
Pin 3
Pin 2
Pin 1
+5VDC
COM
COM
+12VDC
Ground
+12V DC
Fan Signal
Top View of a Fan Connector Front View of a Fan Connector
1 2 3
Ground
+12V DC
Fan Signal
The 845D-MVT MAINBOARD
Page 16
2.5.5. WOL (Wake-On-LAN) Connector
Connector: CN16
Type: 3 pin
The mainboard has a WOL (Wake-On-LAN) connector. This connector must be
connected to a LAN card that has Wake-On-LAN (WOL) output. It powers up
the system when a wakeup packet or signal is received through the LAN card.
In order to use the WOL LAN card to trigger the power on the PC system, the
switching power supply must have the ability to provide a driving current of at
least 720 mA and be connected to a “5V standby” voltage.
Hardware Installation
2.5.6. CD-IN/AUX-IN Connector
Connector: CN21 (CD-IN)/CN45 (AUX-IN)
Type: 4 pin un-housed
This mainboard has one CD-IN connector, AUX-IN connector. The CD-IN con-
nector is used to connect the CD ROM audio out and allows the system to re-
ceive audio input from the CD ROM. The AUX-IN connector allows the system
to receive signals from other audio devices like a radio or tape.
Right Channel
CD-IN / AUX-IN
Left Channel
CD-IN / AUX-IN
Ground
1 Left Channel CD/AUX-IN
2 Ground
3 Ground
4 Right Channel CD/AUX-IN
Top View of a CD/AUX-IN
Connector Front View of a CD/AUX-IN
Connector
Ground
WOL
5V_SB
Ground
15V_SB
2Ground
3WOL
Top View of a WOL Connector Front View of a WOL Connector
2.5.7. Front Audio Connector
Connector: CN39
Type: 10 pin
This connector should be used with the front utility panel. The utility panel was
developed so that the user is able to bring the Hear Phone OUT and MIC-IN
connectors to the front of their PC. This makes things like plugging in speakers
and earphones much less troublesome. Please make sure the Pin 1 location
(diagram on next page).
The 845D-MVT MAINBOARD Page 17
Hardware Installation
2.5.8. USB 3 and USB 4
Connector: CN 30 (USB 3)/CN 31 (USB 4)
Type: 5 pin
You already have two USB ports available, USB 1 and 2 (see external connec-
tors). The internal USB connectors allow you to add on an optional kit to ex-
pand the total number of USB ports available. The 845D-MVT has two inter-
nal USB connectors (CN30 and CN31). This enables you to use an extra two
USB devices. Cable for these additional connectors needs to be purchased
separately.
Note: The PIN assignment of the internal USB 1.1 connectors (CN30, CN31)
are follow the specifications of Intel standard.
Top View of USB Ports Front View of USB Ports
9 Key
7 Ground
5 Data+
3 Data-
1 VCC 2 VCC
4 Data-
6 Data+
8 Ground
10NC
USB3/4
1 VCC
3 Data -
5 Data +
9 Key
7 Ground
USB3/4
10
9
8
7
6
5
4
3
2
1
Pin Pin
1 MIC-IN (Left) 2 Ground
3 MIC-IN (Right) 4 NC
5 LINE-OUT R 6 NC
7 NC 8 Key
9 LINE-OUT L 10 NC
Front Audio Connector
The 845D-MVT MAINBOARD
Page 18
Hardware Installation
2.6.1. PW: Power On / Off and External Suspend Switch Connector
The Power On/Off connector has two functions. It can be the Power Switch or
Suspend Switch of your PC system. You can either choose “Delay 4 Sec” or
“Instant OFF” (Please refer to the BIOS setup instructions in Chapter 3).
Option 1: If you choose “Delay 4 Sec.” In the BIOS CMOS Setup, the func-
tion of “PW” will be:
A. When the system power is "OFF", press this switch, the system will
power on.
B. When system power is "ON”, you can select two different modes: -
Mode 1: Press and hold the Power ON button for less than 4 seconds and then
release it. The system will be turned into Suspend mode (turned into the
GREEN mode) When the system is in the Suspend mode:-
!Press the Power on button (less than 4 seconds), the system will return
to Full-ON mode.
!Press and hold the Power On Button for more than 4 seconds, the
system will be powered off.
Mode 2: Press and hold the Power ON button for more than 4 seconds, the
system will be completely powered off.
Option 2: If you choose “Instant OFF.” In the BIOS CMOS Setup, the power
switch will operate like a normal ON / OFF Power button.
2.6.2. HL: HDD LED Connector
Any read and write activity by the HDD will turn this LED on.
2.6.3. RS: Reset Button Connector
If you connect this connector, you will be able to reset you computer by press-
ing the reset button at the front of the chassis.
The following System Panel Buttons and LED
Connectors (2 x 3 pins) can be found at the
front of the mainboard on the left hand side.
Top View of the System Panel
and LED Connectors
'#5
PW= Power On/Off and Sus-
pend Switch Connector
HL = HDD LED Connector
RS = Reset Button Connector
The 845D-MVT MAINBOARD Page 19
Hardware Installation
2.7.1. Speaker Connector
Connect your chassis speaker to this
four pin connector. It allows you to
hear systems beeps and warnings
sound.
2.7.2. Front Panel Power LED
The chassis Power LED connector can
be connected to the four pin
connector. When you turn your
system on, this LED will also be
turned on.
Top View of the Speaker
and Power LED Connector
SPEAKER
+5V DC
+5V DC
Speaker
Signal
NC
Speaker
Signal
Ground
Speaker
Signal
NC
POWER LED
PIN 1
PIN 1
2.8.1. PS/2 Keyboard connector.
This connector only supports a PS/2 keyboard plug. If you have a standard AT
size (large DIN) keyboard plug, you need to use a mini DIN adapter.
Connector: CN 1
Type: 6 pin female
2.8.2. PS/2 Mouse Connector.
This connector only supports a PS/2 mouse plug. If a PS/2 mouse is de-
tected then IRQ 12 will be directed to CN 2.
Connector: CN 2
Type: 6 pin female
2.8.3. Serial Port 1 (COM 1) and Serial Port 2 (COM 2)
Connector: CN 3 (COM 1)
Type: 9 pin male
One serial port is available for a mouse and
other serial devices. (I/O addresses used
are 3F8H/2F8H/3E8H/2E8H and IRQ3/IRQ4,
selected by CMOS setup.)
COM 1 COM 2
The 845D-MVT MAINBOARD
Page 20
Hardware Installation
Connector: CN 5
Type: 25 pin female.
This parallel port is used by printers
which support the SPP, EPP and ECP
modes IRQ7 or IRQ5 can be se-
lected. The ECP mode will use either
DMA 3 or DMA 1 (which can be se-
lected by the BIOS setup program).
2.8.4.
Parallel Port Connector (LPT)
2.8.5. Universal Serial Bus (USB) Port 1 & 2
Connector: CN 6 (USB 1)/ CN 7 (USB 2)
Type: 4 pin female
Two USB ports are available for connecting
USB devices. The mainboard is also
equipped with an expansion connector that
supports two additional USB external
connectors. (The USB cable is not included
with the mainboard).
USB 2
USB 1
2.8.6. Audio/Game Port Connector
Connector: CN 18
Type: 15 pin female
The Game/MIDI port connector is a
dual purpose connector. It can either
be used to connect a joystick to the
computer for game participation, or it
can be used to attach an external
MIDI device. All these motherboards
have 3D audio interfaces onboard.
SPK-OUT LINE-IN MIC-IN
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