Acorp 7VIA71A User manual

The information presented in this publication has been
made carefully for reliability; however, no responsibility
is assumed for inaccuracies. Specifications are subject
to change without notice.
IBM, PC/AT, and PC/XT are trademarks of Interna-
tional Business Machines Corporation.
Slot-A is a trademark of AMD Corporation
AWARD is a registered trademark of Award
Sofftware Inc.
MS-DOS and WINDOWS NT are registered trade-
marks of Microsoft Corporation.
Trademarks and/or registered trademarks are the
properties of their respective owners.
User's Manual Version 1.1
7VIA71A

Table of Contents
Chapter 1 Introduction ................................................ 1
How this manual is organized ............................. 1
Package checklist ................................................ 2
Chapter 2 Features ...................................................... 3
Features of the mainboard ........................... 3
The mainboard layout ............................... 6
Chapter 3 Installation .................................................. 7
System Installation Setups ........................ 9
Static Electricity Precaution ...................... 9
Jumper Settings ........................................ 10
System Memory (DIMM moduleS) ............14
DIMM Memory Installation ........................ 15
Wake Up On LAN .....................................31
Central Processing Unit (CPU) ..................17
Removing the Processor ...........................20
Installing OEM Processor ..........................21
Clearance Requirements ..........................23
Fan Exhaust ...............................................23
External Connectors .................................. 24

1 / Chapter 1 Introduction1 / Chapter 1 Introduction
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1
Chapter 1
Introduction
How This Manual is Organized
This manual is divided into the following sections:
Chapter 1 Introduction : Manual information and checklist.
Chapter 2 Features : Information and Specifications con-
cerning this mainboard.
Chapter 3 Installation : Instructions on setting up the board.

2 / Chapter 1 Introduction2 / Chapter 1 Introduction
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2 / Chapter 1 Introduction
Package Checklist
Please check that your package is complete . If you discover any item
damaged or missing , please contact with your retailer immediately.
The 7VIA71A mainboard.
Retention Mechanism & Heat Sink Support.
1 x IDE UDMA66 ribbon cable.
1 x floppy ribbon cable.
7VIA71A support software:
- Flash Memory Write utility to update the FLASH BIOS.
- Technical Support Form.
This user's Manual

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3 / Chapter 2 Features
2
Chapter 2
Features
Features of the 7VIA71A Mainboard
The 7VIA71A is designed for the PC user’s who want many new key
features processed by the fastest CPU in a economic package. This
mainboard :
New general CPU support :
- AMD K7 SLOT-A (500 MHz-1GHz Athlon) processor.
- CPU clock select support for 100MHz .
CPU bus speed configuration.

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Chipset :
VIA KX133 chips with I/O subsystems.
Biggest memory capacity :
7VIA71A is equipped with two DIMM socket to support
(16MB, 32MB, 64MB, 128MB.256MB) 168 pin 3.3v SDRAM
SPD(Special Presence Detect).Maximum memory up to
512MB.
AGP for fast VGA solution :
AGP (Accelerator Graphic Port) will enhance & improve dis-
play performance and Application. The bus speed is Support
AGP 2X/4X mode .
PCI Expansion Slot :
Provide five 32 bit PCI slots.
PCI Bus Master 1DE Controller :
Comes with an on-board PCI Bus Master IDE, controller
with two connectors that supports four IDE devices in two
channels, Provides faster data transfer rate, and supports
Enhanced IDE devices such as Tape Backup and CD-ROM
devices(ATAPI). This controller supports PIO mode 3 and 4
(16.6MB/sec.), and Ultra DMA33/66(33/66MB/Sec.), also
supports ZIP100 and LS-120. BIOS support IDE CD-ROM
or SCSI bootup.
Super Multi-I/O :
Provides two high-speed UART2 compatible serial ports
(match NS16C550A compatible) and one parallel port with
SPP,EPP and ECP capabilities. UART2 can also be directed
from COM2 to the Infrared Module for wireless connections.
Two floppy drives of either 5.25" or 3.5 "(1.25MB,1.44MB or
2.88MB) are also supported without an external card. Sup-
ports Japanese standard "Floppy 3 mode" (3.5" 1.25MB).

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CPU built-in Level 2 Cache :
The AMD Athlon includes the largest L1 cache (128K total)
for x86 platforms. The AMD Athlon also features a high-
speed, 64-bit backside L2 cache controller that supports L2
cache sizes ranging from 512K to a massive 8MB. This high-
performance cache design takes advantage of the processor's
high-speed system bus and minimizes bandwidth
bottlenecks.
WOL (Wake On LAN) :
Supports system power up from LAN ring up .
IrDA Port :
Support this serial fast communication up to 115.2Kbps.
Support Ring on by modem/Alarm on :
Support System power up from Modem ring up or timer of
System. Required enabled in Ring on by modem and Alarm
on in BIOS.
To support CPU FAN On/Off indicator under Suspend mode.
To support CPU temperature & Fan detect and Alarm warn-
ing by sound.
Dimension : 30.5 cm x 21 cm
Supports 16-bits stereo audio controller. Sound Blaster 16/
PRO compatible with stereo voice up to 48 KHz sampling rates.
Dual channel game port. (supports Microsoft game-pad up to
8 ports).

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The 7VIA71A Mainboard layout
down : up
K/B
:Mouse
USB
MIDI/
GAME/
AUDIO

7 / Chapter 3 Installation7 / Chapter 3 Installation
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7 / Chapter 3 Installation
Installation
3
Chapter 3
Jumper
Jumper Refer to page
JP1 - CPU bus frequency selection 12
JBAT - Real time Clock RTC clean 12
FAN1 - FAN CONN. for CPU 26
FAN2 - FAN CONN. for AGP 26
FAN3 - FAN CONN. for CPU 26
WOL - Wake ON LAN Function 31
WOM - Wake On Modem Function 31

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8 / Chapter 3 Installation
Expansion Slot 

Which page
SEC(Single Edge Connector) CPU Slot-A 17
168 pin DIMM Socket 14
AGP (Accelerated Graphic port) SLOT 24
PCI SLOT 1,2,3,4,5 -32bits PCI SLOT 24
Connectors Refer to page
PS2_KB - PS/2 Mouse port(UP). 25
PS2_KB - PS/2 AT(mini DIM) Keyboard port(DP)25
COM1 - COM 1 serial port 25
COM2 - COM 2 serial port 25
USB - Universal Serial BUS Ports 0 & 1 25
JUSB1 - Universal Serial BUS Ports 2 & 3 25
PRINT - Parallel port 25
FDD1 - FLOPPY connector 25
IDE1 - Primary IDE connector 27
IDE2 - Secondary IDE connector 27
IR - IrDA connector 28
J4 - HDD LED 29
J4 - Reset Switch 29
J4 - Speaker Connector 30
J4 - Power LED 30
CN1 - ATX Power Connector 30
J4 - ATX Power switch 30
CD_IN - CD Audio Connector 31
CD_IN1 - CD Audio Connector 31

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System Installation Setup
Before using your computer, you must finish the following steps:
1. Set jumpers on mainboard.
2. Install SDRAM module.
3. Install the Athlon Processor.
4. Connect Ribbon Cables, Cabinet Wires, and Power supply.
5. Install Add on Cards.
6. Setup the BIOS software.
Static Electricity Precaution
Keep the mainboard and other system components in their anti-
static packaging until you are ready to install them.
Do all preparative work on a static-free surface with the main
board components facing up.
Unplug your computer when working on the inside.
Wear an Anti-static wrist strap.
Hold the system components, boards or cards by its edges only.
Be careful not to touch any of IC chips, circuitry, contacts or
connections, especially gold contacts on the mainboard.

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Jumper Settings
Jumpers
Several hardware setting are made through the use of jumper caps to
connect jumper pins (Jxx) on the mainboard. See " Map of the
mainboard" for locations of jumpers.
The jumper settings will be described numerically such as [----], [1-2],
[2-3] for no connection, connect pins 1 & 2, and connect pins 2 & 3
respectively. Pin 1 for our mainboard is always on top one or on the
left when holding the mainboard with the keyboard away from
yourself. "P1" is written besides pin 1 on jumper with three pins. The
jumpers will also be shown graphically such as to connect pin
1&2 and to connect 2&3. Jumpers with two pins will be shown
as for Short (on )and for Open (off).For manufacturing
simplicity it may be sharing pins from other groups. Use the diagrams
in this manual instead of following the pin layout on the board. Set-
tings with two jumper numbers require that both jumpers be moved
together. To connect the pin, simply place a plastic jumper cap over
the two pins as diagrammed.
AMR Function -J1
K/B W ake UP Function-J2
J1 AMR FunctionJ1 AMR Function
J1 AMR FunctionJ1 AMR Function
J1 AMR Function
[1-2] Master (Default)[1-2] Master (Default)
[1-2] Master (Default)[1-2] Master (Default)
[1-2] Master (Default)
[2-3] Slave[2-3] Slave
[2-3] Slave[2-3] Slave
[2-3] Slave
J2 K/B Wake UP FunctionJ2 K/B Wake UP Function
J2 K/B Wake UP FunctionJ2 K/B Wake UP Function
J2 K/B Wake UP Function
[1-2] Reserve[1-2] Reserve
[1-2] Reserve[1-2] Reserve
[1-2] Reserve
[2-3] Enabled (Default)[2-3] Enabled (Default)
[2-3] Enabled (Default)[2-3] Enabled (Default)
[2-3] Enabled (Default)
NOTE:NOTE:
NOTE:NOTE:
NOTE:
To use this feature in
bios POWER MANAGERMENY
any_key_wakeup must be
Enabled.

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down : up
K/B
:Mouse
USB
MIDI/
GAME/
AUDIO
Real Time Clock (RTC) RAM - JBAT :
The CMOS RAM is powered by the onboard button cell battery. To
clear the RTC data:
(1)Turn off your computer, (2) Move this jumper to "2-3Pin Clear
Data", (3) Move the jumper back to "Default", (4) Turn on your
computer, (5) Hold down <Delete > during bootup and enter BIOS
setup to re-enter user Preferences.
JBAT CMOS ClearJBAT CMOS Clear
JBAT CMOS ClearJBAT CMOS Clear
JBAT CMOS Clear
[1-2] Normal (Default)[1-2] Normal (Default)
[1-2] Normal (Default)[1-2] Normal (Default)
[1-2] Normal (Default)
[2-3] Enabled (Clear CMOS)[2-3] Enabled (Clear CMOS)
[2-3] Enabled (Clear CMOS)[2-3] Enabled (Clear CMOS)
[2-3] Enabled (Clear CMOS)

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CPU External (Bus) Frequency Selection - JP1
These jumpers tell the clock generator what frequency to send to the
CPU. These allow the selection of the CPUs External Frequency (or
Bus Clock). The Bus Clock times the BUS ratio equals the CPUs
Internal Frequency (the advertised CPU speed).
These jumpers set the frequency ratio between the internal frequency
of the CPU and the external frequency (called the BUS Clock)within
the CPU. These must be set together with the above jumpers CPU
external (Bus) frequency selection.
CPU Model Ratio Bus Freq.
down : up
K/B
:Mouse
USB
MIDI/
GAME/
AUDIO
NOTE:
Most of the CPU frequency are locked by the manufacturer.
This motherboard is able to auto-detect the CPU frequency.

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JP1 A B C D CPU(MHZ) PCI(MHZ)
OFF ON OFF OFF 100 33.3
ON ON ON OFF 102 34.0
OFF OFF OFF ON 104 34.6
ON OFF OFF ON 106 35.3
OFF ON OFF ON 107 35.6
ON ON OFF ON 108 36.0
OFF OFF ON ON 109 36.3
ON OFF ON ON 110 36.6
OFF ON ON ON 111 37.0
ON ON ON ON 112 37.3
OFF ON ON OFF 133 33.3
J3 STR FunctionJ3 STR Function
J3 STR FunctionJ3 STR Function
J3 STR Function
[1-2] Enabled (Default)[1-2] Enabled (Default)
[1-2] Enabled (Default)[1-2] Enabled (Default)
[1-2] Enabled (Default)
[2-3] Normal[2-3] Normal
[2-3] Normal[2-3] Normal
[2-3] Normal
STR Function(Suspend to RAM )-J3
NOTE:NOTE:
NOTE:NOTE:
NOTE:
To use this feature in bios setup POWER
MANAGERMENY must be S1(POS) set to S3(STR).

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System Memory ( DIMM Module)
This 7VIA71A main board supports two 168 pin DIMM ( Dual Inline
Memory Module) of 16 MB, 32 MB, 64 MB, 128 MB ,256MB to form
a memory size between 16MB to 256MB.
The DRAM can be either 45ns,50ns,or 60ns 3.3v SDRAM,and 3.3v
Enhanced Data Output (EDO) RAM.
Install memory in any or all Banks in Combination:
Bank Memory module
DIMM 1 16MB,32MB,64MB,128MB,256MB
( Bank 0-1 ) 168 pin,3.3v SDRAM / EDO RAM
DIMM 2 16MB,32MB,64MB,128MB,256MB
( Bank 2-3 ) 168 pin 3.3v,SDRAM / EDO RAM
Total System Memory(Max 512MB)
Note :


The DIMM Slot does not support any 5v EDO DIMM
module.


The DIMM Slot does not support any 5v SDRAM DIMM
module.


Memory speed setup is required through "Auto Con-
figuration" in BIOS chipset Setup of BIOS
SOFTWARE. If several speed memorious are used, You
must set Auto Configuration to low. Example If both
50ns, 60ns are used, Please set Auto configuration to
60ns.


It's allowed any DIMM module put in any DIMM slot.
It's allowed there are different capacity DIMM module
in all DIMM slot.

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down : up
K/B
:Mouse
USB
MIDI/
GAME/
AUDIO
DIMM Memory Installation
Insert the module (s) as shown. Because the number pins are differ-
ent on either side of the breaks,the module will only fit in the orienta-
tion as shown. SDRAM DIMM modules have different pin contacts
on each side and therefore have a higher pin density.
88 pins 60 pins 20 pins
168Pin DIMM Socket168Pin DIMM Socket
168Pin DIMM Socket168Pin DIMM Socket
168Pin DIMM Socket

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The Dual Inline Memory Module (DIMM) memory module must be 3.
3v Extended Data Output (EDO) DRAM or SDRAM. You can identify
the type of DIMM module by the illustration below:
168 Pin DRAM DIMM Notch Key Definitions
The notch on the DIMM module will shift between left, center, or
right to identify the type and also to prevent the wrong type to be
inserted into the DIMM slot on the Mainboard. You must ask your
retailer for Specifications before purchasing.
Four clock signals are supported on this mainboard
RFU Unbuffered
Buffered
5.0V Reserved
3.3V
DRAM Key Position Voltage Key Position

17 / Chapter 3 Installation17 / Chapter 3 Installation
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Central Processing Unit (CPU)
This main board provides a Single Edge Contact (SEC) slot for AMD
Athlon processor packaged in an SEC cartridge. The SEC slot is not
compatible with other non-Athlon Processors.
Installing the Retention Mechanism
The Mainboard package includes a Retention Mechanism. The Re-
tention Mechanism is used to hold an AMD Athlon Processor to
the AMD Slot-A connector. Make sure the system board is on a
workbench (not in a chassis).
To install the Retention Mechanism, follow the steps below:
1. The Retention Mechanism package includes a Retention Mecha-
nism with captive nut and four captive screws.
2. Hold the Retention Mechanism upright and position it above the
AMD Slot-A connector.
3. Insert the captive screws attached from underneath the
mainboard as shown, and four screws 2 mount bridges directly.
Note:


Don't forget to attach the screw seal before
inserting.


Nut is built into the base of Retention
Mechanism. It's convenient to tighten screw
directly.

18 / Chapter 3 Installation18 / Chapter 3 Installation
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Installing Boxed Processor
1. Mount the two black plastic pegs onto the system board. /these
pegs will be used to attach the fan heatsink supports. Notice that
one hole and the base of
one peg are larger than the
other hole and peg base.
Push each peg into its
hole firmly until you hear
it “ Click” into place.
2. Slide a black plastic
heatsink support onto
each outside edge of the
fan heatsink, making sure that the hole and clip are on the out-
side edge of the support.(If the supports are reversed, the holes
will not line up with the pegs on the main board). Slide each
heatsink support toward the center of the processor until the
support is seated in the outside groove in the fan housing.
Captive nut
Hole