Acorp 6VIA83A 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 International Busi-
ness Machines Corporation.
Pentium is a trademark of Intel Corporation
AWARD is a registered trademark of Phoenix Sofftware Inc.
MS-DOS and WINDOWS NT are registered trademarks of
Microsoft Corporation.
Trademarks and/or registered trademarks are the
properties of their respective owners.
User's Manual Version 1.0
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) ............. 12
DIMM Memory Installation ........................ 13
CPU Installation .........................................15
Clearance Requirements ..........................16
Fan Exhaust ...............................................16
External Connectors .................................. 17
Chapter4 Audio Installation.....................................26
Note:
If there is any change in the content please
refer to our website.Regarding the BIOS
setting & Driver installation,refer the
web site please.(www. acorp.com.tw)
Chapter 1 Introduction / 1
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.
Chapter 4 Audio Installation
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 6VIA83 mainboard.
1 x IDE UDMA66 ribbon cable.
1 x floppy ribbon cable.
6VIA83 support software:
CD driver and utilites.
This user's Manual
Chapter 2 Features / 3
2
Chapter 2
Features
Features of the 6VIA83 Mainboard
The 6VIA83 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 :
- Socket 370 for Intel PPGA/FC-PGA PII/PIII processor.
- CPU clock select support for 66/100MHz and up to
133MHz
CPU bus speed configuration.
4 / Chapter 2 Features
Chipset :
VIA APOLLO PRO+ chips with I/O subsystems.
Biggest memory capacity :
6VIA83 is equipped with four DIMM socket to support
(16MB, 32MB, 64MB, 128MB.256MB) 168 pin 3.3v
SDRAM SPD(Special Presence Detect).Maximum memory
up to 1024MB.
AGP for fast VGA solution :
AGP (Accelerator Graphic Port) will enhance & improve
display performance and Application. The bus speed is 66
MHz .
ISA & PCI Expansion Slot :
Provide one 16 bit ISA, and five 32 bit PCI slots.
PCI Bus Master IDE 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 DMA/66(66MB/Sec.), also sup-
ports 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).
Chapter 2 Features / 5
CPU built-in Level 2 Cache :
128/256KB Pipeline Burst Level 2 cache in the PII/III CPU
processors.
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 and LED indicator under Suspend
mode.
To support CPU temperature detect and Alarm warning by
sound. ( option )
Dimension : 30.4 cm x 20.5 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). ( option )
6 / Chapter 2 Features
The 6VIA83 Mainboard layout
ISA SLOT1
FAN1
down :
up
K/B
:Mouse
USB
COM1
COM2
Printer
MIDI/
GAME/
AUDIO
FAN2
FA N 3
JP1
IDE
FDC
SOCKET
J3
LAN
VIA
JP5
1
IR
J2
12
PCI1PCI2PCI3PCI5 PCI4
ISA SOLT
AGP1
AGP SOLT
J6
1
JP7
11
JP6
DIMM
8 / Chapter 3 Installation
Expansion Slot
Which page
168 pin DIMM Socket 12
Socket 370 15
AGP (Accelerator Graphic port) SLOT 17
PCI SLOT 1,2,3 -32bits PCI SLOT 17
ISA SLOT1 - 16bits ISA SLOT 17
Connectors Refer to page
KB1(UP) - PS/2 Mouse port. 18
KB1(DP) - PS/2 Keyboard port 18
USB - USB1,2 Port 18
COM1 - COM 1 serial port 18
COM2 - COM 2 serial port 18
LPT1 - Parallel port 18
FDC1 - FLOPPY connector 18
IDE1 - Primary IDE connector 20
IDE2 - Secondary IDE connector 20
IR(J1) - IrDA connector 21
J5 - HDD LED 22
J5 - Reset Switch 22
J5 - Speaker Connector 23
J5 - Power LED 23
J5 - ATX Power switch 23
PW1 - ATX Power Connector 23
Chapter3 Installation / 9
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 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.
10 / Chapter 3 Installation
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 manufac-
turing simplicity it may be sharing pins from other groups. Use the
diagrams in this manual instead of following the pin layout on the
board. Settings 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.
Chapter3 Installation / 11
Real Time Clock (RTC) RAM - JP5 :
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 "3-4Pin 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.
ISA SLOT1
FAN1
down :
up
K/B
:Mouse
USB
COM1
COM2
Printer
MIDI/
GAME/
AUDIO
FAN2
FAN 3
JP1
IDE
FDC
SOCKET
J3
LAN
VIA
JP5
1
IR
J2
12
PCI1PCI2PCI3PCI5 PCI4
ISA SOLT
AGP1
AGP SOLT
J6
1
JP7
11
JP6
DIMM
JP5 CMOS Clear
2-3 (default)
Normal
3-4 Clear CMOS
4
1
4
1
12 / Chapter 3 Installation
System Memory ( DIMM Module)
This 6VIA83 main board supports four 168 pins DIMM 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
DIMM 3 16MB,32MB,64MB,128MB,256MB
( Bank 4-5 ) 168 pin 3.3v,SDRAM / EDO RAM
DIMM 4 16MB,32MB,64MB,128MB,256MB
( Bank 6-7 ) 168 pin 3.3v,SDRAM / EDO RAM
Total System Memory(Max 1024MB)
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 memories 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.
Chapter3 Installation / 13
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.
ISA SLOT1
FAN1
down :
up
K/B
:Mouse
USB
COM1
COM2
Printer
MIDI/
GAME/
AUDIO
FAN2
FAN 3
JP1
IDE
FDC
SOCKET
J3
LAN
VIA
JP5
1
IR
J2
12
PCI1PCI2PCI3PCI5 PCI4
ISA SOLT
AGP1
AGP SOLT
J6
1
JP7
11
JP6
DIMM
168 Pin D MM Socket
88 pins 60 pins 20 pins
14 / Chapter 3 Installation
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
Chapter3 Installation / 15
CPU Installation
The motherboard provides a ZIF socket 370. The CPU that came
with the motherboard should have a fan attached to it to prevent
overheating . If this is not the case then purchase a fan before you
turn on your system.
To install a CPU , first turn off your system and remove its cover.
Locate the ZIF socket and open it by first pulling the lever sideways
away from the socket then upwards to a 90-degree right angle. In-
sert the CPU with the correct orientation shown . The notched cor-
ner should point towards the end of the lever. Because the CPU has
a corner pin for two of the four corners, the CPU will only fit in the
orientation as shown.
Notch
ISA SLOT1
FAN1
down :
up
K/B
:Mouse
USB
COM1
COM2
Printer
MIDI/
GAME/
AUDIO
FAN2
FAN 3
JP1
IDE
FDC
SOCKET
J3
LAN
VIA
JP5
1
IR
J2
12
PCI1PCI2PCI3PCI5 PCI4
ISA SOLT
AGP1
AGP SOLT
J6
1
JP7
11
JP6
DIMM
16 / Chapter 3 Installation
Selecting the CPU Frequency
CPU voltage auto-detection and allow user to set CPU frequency
through BIOS setup, no jumper or switch is needed. The correct
CPU information is saved into EPROM, with these technologies,
the disadvantages of Pentium base jumper-less design are eliminated.
There will be no worry of wrong CPU voltage detection and no need
to re-open the housing if CMOS battery loss. The CPU frequency
selection is set by going into:
Choose “CPU SPEED SETTING” from the Main Menu and a screen
with a list of items appears.
CPU Speed
Set to Manual user can use the next two items to decide the
CPU speed.
CPU Ratio
This item lets you select the ratio of Core/Bus frequency. Have
the following selection: 3x, 3.5x, 4x, 4.5x, 5x, 5.5x, 6x, 6.5x, 7.
0x, 7.5x,8
CPU Freqency
This item lets you set external clock (bus clock). The possible
settings are 66,100 and 133 MHZ....
Clearance Requirements
To maintain proper airflow once the processor is installed on the
mainboard, the processor and fan heatsink require certain space
clearances. The clearance above the processor must be at least 0.3
inches. The clearance on at least 3 of 4 sides of the processor and
fan heatsink must be at least 0.2 inches. All cables (for Floppy drive,
Hard drive,CD-ROM,and so on) must be routed clear of the proc-
essor and its airspace.
Fan Exhaust
The processor must be kept cool by using a processor with heatsink
and fan attached . The temperature of the air filled with the fan/
heatsink cannot exceed 45 OC(113 OF ) . The ambient or room tem-
perature must be below 37 OC ( 99 OF) .
Chapter3 Installation / 17
EXTERNAL CONNECTORS
Both Ribbon cable and Connectors on board are with direction signs
to avoid that user insert wrong directions. On other hand, the ribbon
cables should always be connected with the red stripe on the pin 1
of side of the connector.
ISA SLOT1
FAN1
down :
up
K/B
:Mouse
USB
COM1
COM2
Printer
MIDI/
GAME/
AUDIO
FAN2
FAN 3
JP1
IDE
FDC
SOCKET
J3
LAN
VIA
JP5
1
IR
J2
12
PCI1PCI2PCI3PCI5 PCI4
ISA SOLT
AGP1
AGP SOLT
J6
1
JP7
11
JP6
DIMM
FAN 1,2,3
Connector
IR Port
Wake On
LAN
ATX Power
Connector
Floppy
Driver Connec-
tor
CD Audio
Connector
PS/2 Keyboard
PS/2 KeyboardPS/2 Keyboard
PS/2 Keyboard
(6-pin Female)
(6-pin Female)(6-pin Female)
(6-pin Female)
Serial
Port(9-pin
Male)
Serial
Port(9-pin
Male)Serial
Port(9-pin
Male)
Serial
Port(9-pin
Male)
COM1
COM1COM1
COM1 COM2
COM2COM2
COM2 SPEAKER
SPEAKERSPEAKER
SPEAKER MIC
MICMIC
MIC
LINE
IN
LINE
INLINE
IN
LINE
IN
PS/2 Mouse
PS/2 MousePS/2 Mouse
PS/2 Mouse
USB1
USB1USB1
USB1
USB2
USB2USB2
USB2
Parallel
(Printer)
Port
Parallel
(Printer)
PortParallel
(Printer)
Port
Parallel
(Printer)
Port
(25-pin Female)
(25-pin Female)(25-pin Female)
(25-pin Female)
MIDI/(GAME)
Port
MIDI/(GAME)
PortMIDI/(GAME)
Port
MIDI/(GAME)
Port
(15-pin Female)
(15-pin Female)(15-pin Female)
(15-pin Female)
1
2
3
4
5
6
7
9
10
11
12
13
IDE Connec-
tor
8
PANEL
18 / Chapter 3 Installation
1. PS/2 Keyboard port
This connection is for a standard keyboard using an PS/2 plug
(mini DIN) . This connector will not allow standard at AT size
(large DIN) keyboard plugs. You may use a DIN to mini DIN
adapter on standard AT keyboards.
2. PS/2 Mouse port
This system will direct IRQ12 to PS/2 mouse.
3. Serial Port COM 1 and COM 2 port
The two serial ports can be used for pointing devices or other
serial devices. See "Onboard Serial Port" in chipset Feature Setup
of the BIOS SOFTWARE.
NOTE:
Serial {D-type 9pin (F) } must be connected to the
serial port.
4. Parallel Printer port
You can enable the parallel port and choose the IRQ through "
Onboard Parallel Port" in Chipset. Feature Setup of the BIOS
SOFTWARE.
5. Universal Serial BUS Ports 1 & 2
Two USB ports are available for connecting USB devices.
6. Floppy drive connector
This connector supports the provided floppy drive ribbon cable.
After connecting the single end to the board, connect the two
plus on the other end to the floppy drives.
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