No part of this document may be reproduced, transmitted, transcribed, stored in a retrieval system, or
translated into any language, in any form or by any means, electronic, mechanical, magnetic, optical,
chemical, manual or otherwise without the prior written permission of VIA Technologies, Incorporated.
Trademarks
Trademarks
TrademarksTrademarks
All trademarks are the property of their respective holders. PS/2 is a registered trademark of IBM
Corporation.
Disclaimer
Disclaimer
DisclaimerDisclaimer
No license is granted, implied or otherwise, under any patent or patent rights of VIA Technologies. VIA
Technologies makes no warranties, implied or otherwise, in regard to this document and to the products
described in this document. The information provided in this document is believed to be accurate and
reliable as of the publication date of this document. However, VIA Technologies assumes no responsibility
for the use or misuse of the information in this document and for any patent infringements that may arise
from the use of this document. The information and product specifications within this document are subject
to change at any time, without notice and without obligation to notify any person of such change.
FCC
FCC----B Radio Frequency Interference Statement
B Radio Frequency Interference Statement
FCCFCC
B Radio Frequency Interference StatementB 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 personal expense.
Notice 1
Notice 1
Notice 1Notice 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
Notice 2
Notice 2Notice 2
Shielded interface cables and A.C. power cord, if any, must be used in order to comply with the emission
limits.
Tested To Comply
With FCC Standards
FOR HOME OR OFFICE USE
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SSSS
AFETY
AFETY
IIII
NSTRUCTIONS
AFETY AFETY
NSTRUCTIONS
NSTRUCTIONSNSTRUCTIONS
Always read the safety instructions carefully.
Keep this User's Manual for future reference.
Keep this equipment away from humidity.
Lay this equipment on a reliable flat surface before setting it up.
The openings on the enclosure are for air convection hence protects the
equipment from overheating. Do not cover the openings.
Make sure the voltage of the power source and adjust properly 110/220V
before connecting the equipment to the power inlet.
Place the power cord in such a way that people cannot step on it. Do not
place anything over the power cord.
Always unplug the power cord before inserting any add-on card or module.
All cautions and warnings on the equipment should be noted.
Never pour any liquid into the opening. Liquid can cause damage or
electrical shock.
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 worked well or you cannot get it work
according to User's Manual.
The equipment has dropped and damaged.
If the equipment has obvious sign of breakage.
Do not leave this equipment in an environment unconditioned or in a
storage temperature above 60oC (140oF). The equipment may be damaged.
Caution:
Caution:
Caution:Caution:
Only use the appropriate battery specified for this product.
Do not reuse, recharge, or reheat an old battery.
Do not attempt to force open the battery.
Do not discard used batteries with regular trash.
Discard used batteries according to local regulations.
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Safety Instructions ........................................................................................................... iii
Table of Contents............................................................................................................. iv
Getting Started ..................................................................................................... 68
Running the Driver Utilities CD...................................................................... 69
CD Content ..................................................................................................................70
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PECIFICATIONS
The compact and highly integrated VIA NAS 7800 mainboard comes
with an integrated VIA C7® NanoBGA2 processor, boasting of ultra-low
power consumption and cool operation.
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Mainboard Specifications
Mainboard Specifications
Mainboard SpecificationsMainboard Specifications
CPU
CPU
CPUCPU
•VIA C7
Chipset
Chipset
ChipsetChipset
• VIA CN700 North Bridge
• VIA VT8251 South Bridge
Graphics
Graphics
GraphicsGraphics
•Integrated VIA UniChrome™ Pro Integrated Graphics with
•Award BIOS with LPC 4/8Mbit flash memory capacity
Form Factor
Form Factor
Form FactorForm Factor
•17cm X 14.3cm
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NAS 7800 User’s Manual
Mainboard Layout
Mainboard Layout
Mainboard LayoutMainboard Layout
Mini PCI
SYS_FAN
KB/MS
BIOS
LANandUSBportsLAN and USB ports
C_OPEN1
Optional Four-pin 12V
DC Connector
ATX Power
VIA C7 1.5GHz
NanoBGA2 Processor
DDR2 DIMM
USB_2
WP1
LAN_LED
COM1
DIO
CPU_FAN
COM2
J2
MFX
F_Panel
CLEAR_CMOS1
BAT2
SATA ports
IDESATA_LED
VGA
VIA CN700
North Bridge
VIA VT8251
South Bridge
J1
CF slot
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Back Panel Layout
Back Panel Layout
Back Panel LayoutBack Panel Layout
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I
NSTALLATION
This chapter provides you with information about hardware installation
procedures. It is recommended to use a grounded wrist strap before
handling computer components. Electrostatic discharge (ESD) can
damage some components.
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CPU
CPU
CPUCPU
The VIA NAS 7800 mainboard is packaged with a standard VIA C7®
1.5GHz NanoBGA2 processor. Other processor speeds are also available
as manufacturing options. The VIA C7® 1.5GHz processor requires a
heatsink with fan to provide sufficient cooling.
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CPU_FAN
CPU_FANCPU_FAN
CPU_FAN
SYS_FAN
SYS_FANSYS_FAN
SYS_FAN
CPU Fan and System Fan: CPUFAN and SYSFAN
The CPU_FAN (CPU fan) and SYS_FAN (system fan) run on +12V and
maintain system cooling. When connecting the wire to the connectors,
always be aware that the red wire (positive wire) should be connected to
the +12V. The black wire is Ground and should always be connected to
GND.
The VIA NAS 7800 mainboard provide one 240-DIMM slots for DDR2
667/533/400 SDRAM memory modules and supports memory sizes up
to 1GB.
DDR2 SDRAM Module Installation Procedures
• Locate the DIMM slot in the motherboard.
• Unlock a DIMM slot by pressing the retaining clips outward.
• Align a DIMM on the socket such that the notch on the DIMM
matches the break on the slot.
•Firmly insert the DIMM into the slot until the retaining clips
snap back in place and the DIMM is properly seated.
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Available DDR2 SDRAM Configurations
Refer to the table below for available DDR2 SDRAM configurations on
the mainboard.
Slot
Slot Module Size
SlotSlot
DIMM1 64MB, 128MB, 256MB, 512MB, 1GB 64MB-1GB
Maximum supported system memory 64MB-1GB
Module Size Total
Module SizeModule Size
Note:
Note:
Note:Note:
Only supports 1GB SDRAM with 64M x 8bits x16 configuration.
Total
TotalTotal
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Connecting the Power Supply
Connecting the Power Supply
Connecting the Power SupplyConnecting the Power Supply
The VIA NAS 7800 mainboard supports a conventional ATX power
supply for the power system. Before inserting the power supply
connector, always make sure that all components are installed correctly
to ensure that no damage will be caused.
ATX 20-Pin Power Connector
To connect the power supply, make sure the power plug is inserted in
the proper orientation and the pins are aligned. Then push down the
plug firmly into the connector.
Four standard USB 2.0 ports are provided on the back panel.
Gigabit LAN Ports
The mainboard provides one PCI Express Gigabit Ethernet ports
controlled with separate VIA VT6130 PCIe Gigabit Ethernet controllers
and one more PCI Gigabit Ethernet port (available for NAS 7800-15LST)
controlled by a VIA VT6122 Gigabit Ethernet controller.
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SATA1
SATA1SATA1
SATA1
SATA2
SATA2SATA2
SATA2
SATA3
SATA3SATA3
SATA3
SATA4
SATA4SATA4
SATA4
SATA5
SATA5SATA5
SATA5
SATA6
SATA6SATA6
SATA6
SATA7
SATA7SATA7
SATA7
SATA8
SATA8SATA8
SATA8
Connectors
Connectors
ConnectorsConnectors
VGA Connector: VGA
This is an interface for connecting the included VGA pin connector cable.
Pin
Pin Signal
Signal Pin
PinPin
SignalSignal
Pin Signal
Signal
PinPin
SignalSignal
1 GND 2 VCC
3 R 4 SPD2
5 G 6 SPCLK2
7 B 8 HSYNC
9 GND 10 VSYNC
11 GND 12 GND
13 GND 14 KEY
SATA II Connectors: SATA1 up to SATA8
These next generation connectors support the thin SATA cables for
primary internal storage devices. The current SATA interface allows up to
300MB/s data transfer rate, faster than the standard parallel ATA with
133 MB/s (Ultra DMA).
Note:
Note:
Note:Note:
SATA1 to SATA4 connectors are controlled by the South Bridge
VT8251, while SATA5 to SATA8 connectors are controlled by external
SATA controller Marvell 88SE6145 chip.
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IDE Connector: IDE
The mainboard has an Ultra DMA 133/100/66 controller. You can
connect up to two IDE devices in any combination.
If two drives are connected to a single cable, the jumper on the second
drive must be set to slave mode. Refer to the drive documentation
supplied by the vendor for the jumper settings.
Pin Signal
Signal
PinPin
SignalSignal
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USB Pin Connector: USB_2
The mainboard provide one 12-pin USB pin connector (allowing up to
two additional USB 2.0 ports). Therefore mainboard can support up to
six USB 2.0 ports. These ports can be used to connect high-speed USB
interface peripherals such as USB HDD, digital cameras, MP3 players,
printers, modem and the like.