Page 1
G486VPA
Rev. A +
System Board
User’s Manual
- D26450623 -
Page 2
v Copyright 1995 by DFI, Inc.
All rights reserved.
No part of this document may be copied, reproduced in
any form or by any means or used to make any transformation/adaptation without the prior written consent of
DFI, Inc.
DFI, Inc. makes no warranties with respect to this
documentation and disclaims any implied warranties of
merchantability, quality, or fitness for any particular
purpose. The information in this document is subject to
change without notice. DFI, Inc. reserves the right to
make revisions to this publication and to make changes
to any and/or all parts of its content, at any time,
without obligation to notify any person or entity of such
changes. Further, DFI, Inc. assumes no responsibility
for any errors that may appear in this document.
DFI is a registered trademark, and G486VPA is a
trademark of Diamond Flower, Inc. All other product
names mentioned are trademarks or registered trademarks of their respective companies.
Page 3
v FCC Statement on Class B
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 residential
installation. 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.
However, there is no guarantee that interference will
not occur in a particular installation. If this equipment
does cause harmful interference to radio or television
reception, which can be determined by turning the
equipment off and on, the user is encouraged to try to
correct the interference by one or more of the following
measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and
the receiver.
• Connect the equipment into an outlet on a circuit
different from that to which the receiver is
connected.
• Consult the dealer or an experienced radio TV
technician for help.
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.
2. Shielded interface cables must be used in order to
comply with the emission limits.
Page 4
v Table of Contents v
Introduction ..............................................................................
Features and Specifications .........................................
Package Checklist ........................................................
Installation Overview ...............................................................
Preparing the Area ..............................................................
Handling the System Board ................................................
Tips in Handling the System Board ..............................
Hardware Installation ...........................................................
Memory Installation .......................................................
Installing the Modules ............................................
Board Configuration ......................................................
Jumper Settings for Internal/External Battery,
CMOS Clean, Flash EPROM, PS/2 Mouse ......
Jumper Settings for Super I/O Setting ..................
Jumper Settings for PCI Slots ...............................
Cache Configuration .....................................................
Jumper Settings for Cache Memory ......................
CPU Installation ............................................................
Jumper Settings for CPU .......................................
Jumpers JP8, JP12, JP17, JP20, JP25, JP27 and
JP28 ..................................................................
Installing Upgrade CPUs .......................................
Built-in Ports ........................................................................
Serial Ports ...................................................................
Parallel Port ..................................................................
Floppy Disk Drive Connector ........................................
IDE Hard Disk Connector .............................................
PS/2 Mouse Port ...........................................................
Installing Expansion Cards ..................................................
Installing the System Board ................................................
1-1
1-2
1-5
2-1
2-1
2-2
2-2
2-3
2-3
2-8
2-9
2-10
2-14
2-16
2-18
2-20
2-27
2-28
2-44
2-45
2-50
2-51
2-51
2-54
2-55
2-58
2-59
2-61
Page 5
Initial Setup Program ..............................................................
Award BIOS CMOS Setup Utilities .....................................
Standard CMOS Setup .................................................
BIOS Features Setup ....................................................
Chipset Features Setup ................................................
Power Management Setup ...........................................
PCI Configuration Setup ...............................................
Load BIOS Defaults ......................................................
Load Setup Defaults .....................................................
Password Setting ..........................................................
Supervisor Password .............................................
User Password .......................................................
IDE HDD Auto Detection ..............................................
Save & Exit Setup .........................................................
Exit Without Saving .......................................................
3-1
3-2
3-2
3-5
3-7
3-8
3-9
3-10
3-10
3-11
3-11
3-12
3-13
3-14
3-14
IDE Device Drivers ..................................................................
Troubleshooting Checklist .....................................................
Appendix A: Types of Modules ..............................................
Appendix B: System Error Report .........................................
Appendix C: Memory & I/O Maps ..........................................
Appendix D: PCI I/O Pin Assignments ..................................
Appendix E: ISA I/O Pin Assignments ..................................
Appendix F: Connector Pin Assignments ............................
Appendix G: Award BIOS Hard Disk Table ...........................
Appendix H: System Overview ..............................................
4-1
5-1
A-1
B-1
C-1
D-1
E-1
F-1
G-1
H-1
Page 6
PCI/ISA System Board
v Introduction
The G486VPA system board offers several advanced
features integrated into the system board. Its design is
based on the new Peripheral Component Interconnect
(PCI) local bus and Industry Standard Architecture
(ISA) standards.
The G486VPA is an Enetgy Star Compliant system
board that supports the Environmental Protection
Agency's Green PC requirements. It reduces energy
consumption by automatically turning off peripherals
or the entire system when not in use.
The G486VPA system board supports a 237-pin Zero
Insertion Force (ZIF) CPU socket that allows users to
easily upgrade their CPUs. It also supports a Flash
EPROM for easy BIOS upgrades. Flash EPROM is a
memory chip for the storage of BIOS which can be
erased in bulk or modified using a software utility.
The G486VPA is equipped with three PCI slots, three
ISA slots and one shared PCI/ISA slot.
Equipped with one built-in VL-Bus IDE connector and
one ISA IDE connector, the G486VPA system board can
control four drives and supports fast Mode 3 hard drives
and hard drives larger than 528MB under DOS. The
system board is also equipped with two serial ports, an
ECP/EPP parallel port, a floppy disk drive controller,
and one mini-DIN-6 connector for the PS/2 mouse.
The G486VPA can support 1MB to 128MB of memory
using 256Kx36, 512Kx36, 1Mx36, 2Mx36, 4Mx36,
8Mx36 and 16Mx36 72-pin SIM modules.
1-1 u Introduction
Page 7
Features and Specifications
Processor
• 5V CPUs
Intel 486SX/DX/DX2 (full series) and Pentium
OverDrive Processor
AMD 486DX/DXL/DXL2 (full series)
Cyrix 486SX/DX/DX2 (full series)
• 3.3V CPUs
Intel 486DX4-75/100
AMD 486DX2-66/80NV8T,
486DX4-75/100NV8T,
486DX2-66/80 SV8B (starting with Rev. A)
486DX4-75/100 SV8B
Cyrix 486DX2V-50/66/80
Chipset
• VIA - VT82C496G - system and cache controller
VT82C505 - VL-PCI bridge
VT82C406 - peripheral chip
Power Management
• Supports System Management Mode (SMM) and
CPU stopped clock
• Hardware provides flexible event-driven power
management scheme and easy CPU transition state:
Ready, Doze and Suspend
• Microsoft APM compliant
• EPA Energy Star compliant design
G486VPA
TM
BIOS
• Award system BIOS (Flash EPROM)
• Supports IDE HDDs larger than 528MB under DOS
(LBA mode only)
• System and EGA/VGA BIOS shadow
Introduction u 1-2
Page 8
PCI/ISA System Board
Super I/O Interface and Fast IDE
• Two NS16C550 compatible serial ports
• One parallel port with EPP and ECP support
• Supports 360K, 720K, 1.2M, 1.44M and 2.88MB
floppy drives
• Two fast IDE connectors:
Primary IDE connector provides a VL-Bus IDE
Secondary IDE connector provides an ISA IDE
• PS/2 mouse port
Cache Memory
• 128K, 256K, 512K or 1MB
• Supports Level 1 and Level 2 write-back/
write-through cache
Memory Onboard
• 1MB to 128MB
• Four 72-pin SIMM sockets
• Supports memory parity check function
• 256Kx36, 1Mx36, 4Mx36, and 16Mx36 (four banks)
• 512Kx36, 2Mx36 and 8Mx36 (two banks)
Interface to support up to two Mode 3
enhanced HDDs
Interface to support an ATAPI Compliant
CD-ROM or a tape drive
Expansion Slots
• Three dedicated PCI slots
• One shared PCI/ISA slot
• Three dedicated 16-bit ISA slots
1-3 u Introduction
Page 9
Due to the size of the CPU with its accompanying
heatsink/fan component, the following are the slot
limitations:
PCI/ISA shared slot and PCI slot 2 will be limited
to 2/3 length PCI cards.
ZIF Socket
• 237-pin ZIF socket (Intel Socket 3)
Board Dimensions
• 28cm (11.02") x 22cm (8.58")
Baby AT form factor
PCB
• 4 layers
G486VPA
Introduction u 1-4
Page 10
PCI/ISA System Board
Package Checklist
The G486VPA package contains the following items:
• The G486VPA system board
• The G486VPA user’s manual
• One IDE driver diskette
• One 34-pin floppy disk drive cable
• Two 40-pin IDE hard disk cables
• One 25-pin printer port cable for chassis mounting
• One card-edge bracket with serial and mouse port
cables
If any of these items are missing or damaged, please
contact your dealer or sales representative for assistance.
1-5 u Introduction
Page 11
v Installation Overview
This chapter summarizes the steps in installing the
G486VPA system board into your system unit. It also
includes a description of the area in which you must
work and directions for memory installation. Before
installing the system board, obtain the memory you plan
to install. Please refer to the memory chart on pages 2-4,
2-5 and 2-6 for the number and type of SIM modules
needed for the amount of memory you require.
Preparing the Area
Before unpacking the system board, make sure the
location you have selected is relatively free of dust and
static electricity. Excessive exposure to dust, static
electricity, direct sunlight, excessive humidity, extreme
cold, and water can damage the operational capabilities
of your system board. Avoid placing the unit on soft
surfaces such as beds and carpeted floors which can
hinder air circulation. These areas also attract static
electricity which can damage some circuits on your
system board.
G486VPA
Make sure that the power source has a properly
grounded, three-pronged socket. It is essential that the
power connection be properly grounded for correct
functioning of your system board. For further protection,
we recommend that you use a surge suppressor. This
will protect the system board from damage that may
result from a power surge on the line.
Installation Overview u 2-1
Page 12
PCI/ISA System Board
Move items that generate magnetic fields away from
your system board, since magnetic fields can damage
your system board. Once you have selected the ideal
location, unpack the G486VPA system board carefully.
Handling the System Board
It is quite easy to inadvertently damage your system
board even before installing it to your system unit.
Static electrical discharge can damage computer components without causing any signs of physical damage.
You must take extra care in handling the system board
to ensure against electrostatic build-up.
Tips in Handling the System Board
1) To prevent electrostatic build-up, leave the board in
its anti-static bag until you are ready to install it.
2) Wear an antistatic wriststrap.
3) Do all preparation work on a static-free surface with
components facing up.
4) Hold the system board by its edges only. Be careful
not to touch any of the components, contacts or
connections, especially gold contacts on the board.
5) Avoid touching the pins or contacts on all modules
and connectors. Hold modules and connectors by
their edges.
2-2 u Installation Overview
Page 13
Warning:
Electrostatic discharge (ESD) can damage your upgrade
processor, disk drives, add-in boards, and other
components. Perform the upgrade instruction
procedures described at an ESD workstation only. If
such a station is not available, you can provide some
ESD portection by wearing an antistatic wrist strap and
attaching it to a metal part of the system chassis. If a
wrist strap is unavailable, establish and maintain
contact with the system chassis throughout any
procedures requiring ESD protection.
Hardware Installation
Memory Installation
The G486VPA system board can support 1MB to
128MB of memory using HSIM modules. HSIM is an
acronym for High Density Single In-line Memory.
A SIM module consists of several RAM chips soldered
onto a small circuit board. A SIM module connects to
the system board via a 72-pin card-edge connector.
G486VPA
The SIM sockets are divided into four banks on the
system board. The G486VPA uses 256Kx36, 1Mx36,
4Mx36, and 16Mx36 HSIM modules installed in four
banks or 512Kx36, 2Mx36 and 8Mx36 HSIM modules
installed in two banks.
You will need 1, 2, 3 or 4 pieces of SIM modules,
depending on the amount of memory you intend to
install. The following table summarizes the bank locations and modules needed for the corresponding memory
sizes.
Installation Overview u 2-3
Page 14
PCI/ISA System Board
Bank 2 Bank 3Memory Size Bank 0 Bank 1
1M 1M 2M 1M 1M
3M 1M 1M
4M 1M 1M
4M 4M 5M 4M 1M
6M 4M 1M
7M 4M 1M
8M 4M 4M
9M 4M 4M
10M 4M 4M
12M 4M 4M
13M 4M 4M
16M 4M 4M
16M 16M 17M 16M 1M
18M 16M 1M
19M 16M 1M
20M 16M 4M
21M 16M 4M
22M 16M 4M
24M 16M 4M
25M 16M 4M
28M 16M 4M
32M 16M 16M
33M 16M 16M
34M 16M 16M
36M 16M 16M
40M 16M 16M
48M 16M 16M
49M 16M 16M
52M 16M 16M
64M 16M 16M
64M 64M -
- -
- 1M 1M 1M
- -
- 1M 1M -
- 1M 1M 1M
4M 4M 1M
4M 4M
- -
- 1M 1M 1M
- 1M 1M 1M
4M 4M 1M
4M 4M
- 1M 1M 1M
4M 4M 4M
16M 16M 1M
16M 4M
16M 16M
- -
2-4 u Installation Overview
Page 15
G486VPA
Memory Size Bank 0 Bank 1
65M 64M 1M
68M 64M 4M
69M 64M 4M
72M 64M 4M
80M 64M 16M
81M 64M 16M
84M 64M 16M
128M 64M 64M
128M 64M 2M 2M(D) * 3M 2M(D) * 4M 2M(D) * 4M 2M(D) * 6M 2M(D) * 7M 2M(D) * 10M 2M(D) * 18M 2M(D) * 19M 2M(D) * 22M 2M(D) * 8M 8M(D) * 9M 8M(D) * 12M 8M(D) * 13M 8M(D) * 16M 8M(D) * 16M 8M(D) * 24M 8M(D) * 25M 8M(D) * 28M 8M(D) * 72M 8M(D) * 32M 16M(D) * 32M 32M(D) * 33M 32M(D) * 34M 32M(D) * 36M 32M(D) * -
Bank 2 Bank 3
- -
- 1M 4M -
- 1M 4M -
- 64M -
- 1M 1M 2M(D) * 4M 4M 1M
4M 4M
16M 16M 1M
16M 4M
- 1M 4M 4M 1M
4M 4M
8M(D) * 16M 16M 1M
16M 4M
64M 16M(D) * -
- 1M 2M(D) * 4M -
* (D) - Double Density
Installation Overview u 2-5
Page 16
PCI/ISA System Board
Memory Size Bank 0 Bank 1
37M 32M(D) * 40M 32M(D) * 40M 32M(D) * 48M 32M(D) * 49M 32M(D) * 52M 32M(D) * 64M 32M(D) * 96M 32M(D) * -
* (D) - Double Density
Bank 2 Bank 3
4M 1M
4M 4M
8M(D) * 16M 16M 1M
16M 4M
32M(D) * 64M -
Note:
If a double row 36-bit SIMM (Double Density SIMM) is
installed in Bank 2 or Bank 3, the other three banks
cannot support 16MB modules.
2-6 u Installation Overview
Page 17
PC87332VF
PCI 4
PCI 3
BANK 1
SM4BANK 3
SM3BANK 2
SM2
SM1BANK 0
VIA
VT82C496G
G486VPA
PCI 2
PCI 1
ISA SL1
ISA SL2
ISA SL3
ISA SL4
VT82C505
ISA SL5
ISA SL6
ISA SL7
ISA SL8
VIA
VIA
VT82C406
• Pin 1 of the SIMM socket
Locations of the SIM Sockets on the System Board
Note:
If you intend to install the amount of memory that can
be supported by one piece of HSIM module, you can
install it in any of the banks. The bank you choose is
considered to be Bank 0. Each of the four banks can
assume the function of the Bank 0 only if there is one
HSIMM installed.
Installation Overview u 2-7
Page 18
PCI/ISA System Board
Installing the Modules
An HSIM module simply snaps into a socket on the
system board. Pin 1 of the HSIM module must correspond with Pin 1 of the socket.
1. Position the HSIM module above the socket with the
“notch” in the module aligned with the “key” on the
socket.
2. Seat the module at a 45o angle into the bank. Make
sure it is completely seated. Tilt the module upright
until it locks in place in the socket.
2-8 u Installation Overview
Page 19
Board Configuration
G486VPA
JP41
ISA Slot 4
ISA Slot 8
JP15
ISA Slot 2
ISA Slot 3
ISA Slot 6
ISA Slot 7
VT82C406MV
JP27
JP25
JP26
JP28
JP32
JP31
J13
J14
J12 J11 J10 J9 J8 J7 JP40
JP4
JP2
JP1
BIOS
JP3
VF
CN2
CN3
PCB7332
J1
J2
PL1
ISA Slot 1
J3
PCI
2
1
4
3
PCI
PCI
PCI
SM1SM2SM3SM
ISA Slot 5
JP11
JP18
JP19
JP21
JP12
JP14
JP13
JP23
JP22JP24
VT82C505
JP17
JP8
J4
4
J5
J6
JP16
Bank 1
VT82C496G
TAG
JP36-JP34 JP33
JRN3
JRN2
JRN1
JP42
JP39
JP38
JP37
Bank 0
System Board Layout
Installation Overview u 2-9
Page 20
PCI/ISA System Board
Jumper Settings
Jumper Settings for Internal/External Battery, CMOS Clean, Flash
EPROM, PS/2 Mouse
JP16
PCI 4
JP1
JP2
JP4
E
P
R
O
M
PCI 3
PCI 2
PCI 1
Locations of Jumpers JP1, JP2, JP4 and JP16
on the G486VPA System Board
2-10 u Installation Overview
Page 21
G486VPA
Jumper JP1
Internal Battery Select
The G486VPA comes with an internal Lithium battery.
If you wish to install an external 3.6V Lithium battery,
set JP1 pins 1 and 2 to On.
321
1-2 On: External
Battery Enabled
2-3 On: Internal
Battery Enabled
321
(Default)
Note:
If you enable the external battery, you must connect the
external battery to connector JP3 or your system will
lose its CMOS settings when powered off.
Jumper JP2
CMOS Clean Select
If, for some reason, the CMOS becomes corrupted, the
system can be reconfigured with the default values
stored in the ROM BIOS. To load the default values, set
JP2 pins 2 and 3 to On for approximately two minutes,
then return to the default position.
321321
1-2 On: Normal
(Default)
2-3 On: CMOS
Clean
Installation Overview u 2-11
Page 22
PCI/ISA System Board
Jumper JP4
EPROM Type
Jumper JP4 shoud be set to match the type of the
EPROM installed on the system board. Refer to page
2-9 for the location of the EPROM installed on your
system board.
321
1-2 On: 12V Flash
EPROM 28F010
(Default)
2-3 On: 5V Flash
EPROM 29F010 or
EPROM 27C010
321
Jumper JP16
PS/2 Mouse
The G486VPA package includes a card-edge bracket
with serial and mouse port. The PS/2 mouse port uses
IRQ12. To enable PS/2 mouse, set Jumper JP16 pins 1
and 2 to On. Make sure you connect the PS/2 mouse
port to Connector CN3.
JP16
PS/2 Mouse Enabled
PS/2 Mouse Disabled *
* Default setting
1-2 On
2-3 On
2-12 u Installation Overview
Page 23
G486VPA
321
2-3 On: PS/2 Mouse
Disabled (Default)
321
1-2 On: PS/2 Mouse
Enabled
Installation Overview u 2-13
Page 24
PCI/ISA System Board
Jumper Settings for Super I/O Setting
VT82C406
VIA
JP15
Location of Jumper JP15 on the System Board
2-14 u Installation Overview
Page 25
G486VPA
Jumper JP15
ECP DMA Channel Select
Jumper JP15 is used to select DMA channel. The DMA
channel must be compatible with the I/O cards you are
using. Normally, DMA3 channel supports sound cards.
Set Jumper JP15 pins 1-3 and 2-4 to On unless this
seting provides inadequate channel required by your
system.
JP15
No DMA
DMA 1 *
DMA 3
* Default setting
1
3
5
2
4
6
1-3, 2-4 On:
DMA 1 (Default)
All pins Off
1-3, 2-4 On
3-5, 4-6 On
1
3
5
2
4
6
1
3
5
Off: No DMA 3-5, 4-6 On:
DMA 3
2
4
6
Installation Overview u 2-15
Page 26
PCI/ISA System Board
Jumper Settings for PCI Slots
JP11
VIA
VT82C505
JP13
PCI 4
PCI 3
PCI 2
PCI 1
Locations of Jumpers JP11 and JP13
on the G486VPA System Board
2-16 u Installation Overview
Page 27
G486VPA
Jumpers JP11 and JP13
CPU External Clock Speed for PCI Slots
These jumpers should be configured according to the
type of CPU installed on the system board. Set Jumpers
JP11 and JP13 pins 2 and 3 to On if the CPU external
clock speed is greater than 33MHz. If the CPU external
clock speed is less than or equal to 33MHz, set Jumpers
JP11 and JP13 pins 1 and 2 to On.
JP13
2-3 On
1-2 On
CPU External Clock
Speed > 33MHz
CPU External Clock
Speed >33MHz
CPU External Clock
Speed <= 33MHz *
* Default setting
321 321
JP11, JP13 pins 1-2 On:
CPU External Clock Speed
<= 33MHz (Default)
JP11
2-3 On
1-2 On
JP11, JP13 pins 2-3 On:
Set Jumpers JP11 and JP13 pins 2-3 to On if your
G486VPA system board uses one of the following
CPUs: 486DX-50, 486DX2-80, 486DX-40 or
486SX-40. The CPU external clock speed supported
by each of them is greater than 33MHz.
Installation Overview u 2-17
Page 28
PCI/ISA System Board
Cache Configuration
The G486VPA system board can be configured to four
different cache sizes: 128KB, 256KB (Default size),
512KB and 1MB. The SRAM sockets are divided into
two banks. Regardless of the amount of cache memory
installed, one 8Kx8, 32Kx8, 64Kx8 or 128Kx8 is
needed for tag RAM to store the cacheable addresses.
The locations of the SRAM sockets on the system board
are shown below.
• Pin 1 of the
SRAM socket
BANK 1 BANK 0
TAG
Locations of the SRAM Sockets on the G486VPA System Board
2-18 u Installation Overview
Page 29
G486VPA
To upgrade from 256KB to 512KB of cache memory,
use four pieces of 128Kx8 or eight pieces of 64Kx8
SRAM.
Cache Size
1MB
512KB
512KB
256KB
256KB *
128KB
* Default setting
Data SRAM Tag SRAM
128Kx8x8
128Kx8x4
64Kx8x8
64Kx8x4
32Kx8x8
32Kx8x4
128Kx8x1 or
64Kx8x1
32Kx8x1
32Kx8x1
32Kx8x1
32Kx8x1
8Kx8x1
64KX8 or 128Kx8
8KX8 or 32Kx8
Cacheable
Range
128MB
128MB
128MB
64MB
64MB
32MB
SRAM Socket
Note:
When installing the cache chips, populate Bank 0 first
and then Bank 1. For example, to configure 128K of
cache memory, install four 32Kx8 chips in Bank 0 and
leave the SRAM sockets of Bank 1 empty.
Installation Overview u 2-19
Page 30
PCI/ISA System Board
Jumper Setting for Cache Memory
JP23
JP22
JP24
TAG
JP38
JP37
JP39
Locations of Jumpers JP22, JP23, JP24, JP37, JP38 and JP39
on the G486VPA System Board
2-20 u Installation Overview
Page 31
128KB Cache SRAM
Bank 1 Bank 0
JP22
G486VPA
32Kx8
32Kx8
32Kx8
32Kx8
8Kx8 (TAG)
321
321
JP37
JP38
Note:
JP23
JP24
JP39
This refers to an empty
SRAM socket.
Installation Overview u 2-21
Page 32
PCI/ISA System Board
256KB Cache SRAM
Bank 1 Bank 0
JP22
64Kx8
64Kx8
64Kx8
64Kx8
32Kx8 (TAG)
321
321
JP37
JP38
JP23
JP24
2-22 u Installation Overview
JP39
Page 33
256KB Cache SRAM *
Bank 1 Bank 0
G486VPA
32Kx8
32Kx8
32Kx8
32Kx8
JP22
JP23
JP24
* Default setting
32Kx8
32Kx8
32Kx8
32Kx8
32Kx8 (TAG)
321
321
JP37
JP38
JP39
Installation Overview u 2-23
Page 34
PCI/ISA System Board
512KB Cache SRAM
Bank 1 Bank 0
JP22
128Kx8
128Kx8
128Kx8
128Kx8
32Kx8 (TAG)
321
321
JP37
JP38
JP23
JP24
2-24 u Installation Overview
JP39
Page 35
512KB Cache SRAM
Bank 1 Bank 0
G486VPA
JP22
JP23
JP24
64Kx8
64Kx8
64Kx8
64Kx8
64Kx8
64Kx8
64Kx8
64Kx8
32Kx8 (TAG)
321
321
JP37
JP38
JP39
Installation Overview u 2-25
Page 36
PCI/ISA System Board
1MB Cache SRAM
Bank 1 Bank 0
JP22
JP23
JP24
128Kx8
128Kx8
128Kx8
128Kx8
128Kx8
128Kx8
128Kx8
128Kx8
128Kx8/64Kx8 (TAG)
321
321
JP37
JP38
JP39
2-26 u Installation Overview
Page 37
CPU Installation
The G486VPA is equipped with a 237-pin Zero
Insertion Force (ZIF) socket at location U27 of the
system board. This socket is designed for the easy
removal of the old CPU and the easy insertion of the
upgrade CPU. If you need to apply excessive force to
insert the CPU, the installation is being done incorrectly.
Make sure the jumpers are set correctly before applying
power, or you may damage the CPU or system board.
G486VPA
U27
Pin 1
Location of the ZIF Socket on the G486VPA System Board
Installation Overview u 2-27
Page 38
PCI/ISA System Board
Jumper Settings for CPU
JP14
JP18 JP21
JP19
1
JP26
JRN2
JP42
JRN1
JP31
JP41
JP33
JP35
JP36
JRN3
JP34
JP32
Locations of Jumpers JP14, JP18, JP19, JP21, JP26, JP31, JP32,
JP33, JP34, JP35, JP36, JP41, JP42, JRN1, JRN2 and
JRN3 on the G486VPA System Board
2-28 u Installation Overview
Page 39
Intel 486SX
G486VPA
JRN1
1
JP42
JRN2
2
1
JP14
3
JP33
1
JRN3
JP34
JP35
JP36
1
2 3
1
Intel 486SX
123
JP26
Note:
Make sure Jumpers JP18, JP19 and JP21 are set correctly. These jumpers are used to select the CPU external clock speed. The external CPU clock speed of the
Intel 486SX CPU is equal to its internal clock speed.
Please refer to page 2-42.
Jumpers JP31, JP32 and JP41 are used to select the
CPU voltage. Make sure they are set correctly. Please
refer to pages 2-42 and 2-43.
Installation Overview u 2-29
Page 40
PCI/ISA System Board
Intel 486DX/DX2
(Default Setting)
2
1
3
JP14
JRN1
1
JP42
JRN2
JRN3
JP33
1
JP34
JP35
JP36
1
2 3
1
Intel 486DX/DX2
123
JP26
Note:
Make sure Jumpers JP18, JP19 and JP21 are set correctly. The external CPU clock speed of the Intel 486DX
CPU is equal to its internal clock speed. To get the
external CPU clock speed of the Intel 486DX2 CPU,
divide its internal clock speed by 2. Please refer to page
2-42.
Jumpers JP31, JP32 and JP41 are used to select the
CPU voltage. Make sure they are set correctly. Please
refer to pages 2-42 and 2-43.
2-30 u Installation Overview
Page 41
Intel 486DX4
G486VPA
JRN1
1
JP42
JRN2
2
1
JP14
3
JP33
1
JRN3
JP34
JP35
JP36
1
2 3
1
Intel 486DX4
123
JP26
Note:
Make sure Jumpers JP18, JP19 and JP21 are set correctly. To get the external CPU clock speed of the Intel
486DX4, divide its internal clock speed by 3. Please
refer to page 2-42.
Jumpers JP31, JP32 and JP41 are used to select the
CPU voltage. Make sure they are set correctly. Please
refer to pages 2-42 and 2-43.
Installation Overview u 2-31
Page 42
PCI/ISA System Board
Intel Write-back 486 CPU
JRN1
1
JP42
JRN2
2
1
JP14
3
JP33
1
JRN3
JP34
JP35
JP36
1
2 3
1
Intel Write-back 486
CPU
123
JP26
Note:
Set Jumper JP33 pins 1 and 2 to On to support the
write through mode for the Intel Write-back 486 CPU.
Make sure Jumpers JP18, JP19 and JP21 are set correctly. To get the external CPU clock speed of the Intel
Write-back 486 CPU, divide its internal clock speed by
2. Please refer to page 2-42.
Jumpers JP31, JP32 and JP41 are used to select the
CPU voltage. Make sure they are set correctly. Please
refer to pages 2-42 and 2-43.
2-32 u Installation Overview
Page 43
Intel DX4 ODP
G486VPA
JRN1
1
JP42
JRN2
2
1
JP14
3
JP33
1
JRN3
JP34
JP35
JP36
1
2 3
1
Intel DX4 ODP
123
JP26
Note:
Make sure Jumpers JP18, JP19 and JP21 are set correctly. To get the external CPU clock speed of the Intel
486DX4 CPU, divide its internal CPU clock speed by 3.
Please refer to page 2-42.
Jumpers JP31, JP32 and JP41 are used to select the
CPU voltage. Make sure they are set correctly. Please
refer to pages 2-42 and 2-43.
Installation Overview u 2-33
Page 44
PCI/ISA System Board
Pentium OverDrive Processor
JRN1
1
JP42
JRN2
2
1
JP14
3
JP33
1
JRN3
JP34
JP35
JP36
1
2 3
1
Pentium OverDrive
Processor
123
JP26
Note:
Make sure Jumpers JP18, JP19 and JP21 are set correctly. To get the external CPU clock speed of the
Pentium OverDrive Processor, divide its internal CPU
clock speed by 2.5. Please refer to page 2-42.
Jumpers JP31, JP32 and JP41 are used to select the
CPU voltage. Make sure they are set correctly. Please
refer to pages 2-42 and 2-43.
2-34 u Installation Overview
Page 45
Cyrix Cx486DX/DX2
G486VPA
JRN1
1
JP42
JRN2
2
1
JP14
3
JP33
1
JRN3
JP34
JP35
JP36
1
2 3
1
Cyrix Cx486DX/DX2
123
JP26
Note:
Make sure Jumpers JP18, JP19 and JP21 are set correctly. The external CPU clock speed of the Cyrix
486DX CPU is equal to its internal clock speed. To get
the external CPU clock speed of the Cyrix 486DX2
CPU, divide its internal clock speed by 2. Please refer
to page 2-42.
Jumpers JP31, JP32 and JP41 are used to select the
CPU voltage. Make sure they are set correctly. Please
refer to pages 2-42 and 2-43.
Installation Overview u 2-35
Page 46
PCI/ISA System Board
SGS-Thomson ST486DX/DX2
JRN1
1
JP42
JRN2
2
1
JP14
3
JP33
1
JRN3
JP34
JP35
JP36
1
2 3
1
SGS-Thomson
ST486DX/DX2
123
JP26
Note:
Make sure Jumpers JP18, JP19 and JP21 are set correctly. The external CPU clock speed of the ST486DX
CPU is equal to its internal clock speed. To get the
external CPU clock speed of the ST486DX2 CPU,
divide its internal clock speed by 2. Please refer to page
2-42.
Jumpers JP31, JP32 and JP41 are used to select the
CPU voltage. Make sure they are set correctly. Please
refer to pages 2-42 and 2-43.
2-36 u Installation Overview
Page 47
AMD Am486DX2 (NV8T)
G486VPA
JRN1
1
JP42
JRN2
2
1
JP14
3
JP33
1
JRN3
JP34
JP35
JP36
1
1 2 3
AMD Am486DX2
123
JP26
Note:
Make sure Jumpers JP18, JP19 and JP21 are set correctly. To get the external CPU clock speed of the AMD
Am486DX2 (NV8T), divide its internal CPU clock speed
by 2. Please refer to page 2-42.
Jumpers JP31, JP32 and JP41 are used to select the
CPU voltage. Make sure they are set correctly. Please
refer to pages 2-42 and 2-43.
Installation Overview u 2-37
Page 48
PCI/ISA System Board
Enhanced AMD Am486DX2 (SV8B)
JRN1
1
JP42
JRN2
2
1
JP14
3
JP33
1
JRN3
JP34
JP35
JP36
1
1 2 3
Enhanced
AMD Am486DX2
(SV8B)
123
JP26
Note:
Jumper JP42 is used to support Enhanced Am486DX2
CPUs.
Make sure Jumpers JP18, JP19 and JP21 are set correctly. To get the external CPU clock speed of the
Enhanced AMD Am486DX2 (SV8B), divide its internal
CPU clock speed by 2. Please refer to page 2-42.
Jumpers JP31, JP32 and JP41 are used to select the
CPU voltage. Make sure they are set correctly. Please
refer to pages 2-42 and 2-43.
2-38 u Installation Overview
Page 49
AMD Am486DX4
G486VPA
JRN1
1
JP42
JRN2
2
1
JP14
3
JP33
1
JRN3
JP34
JP35
JP36
1
1 2 3
AMD Am486DX4
123
JP26
Note:
Make sure Jumpers JP18, JP19 and JP21 are set correctly. To get the external CPU clock speed of the AMD
Am486DX4, divide its internal CPU clock speed by 3.
Please refer to page 2-42.
Jumpers JP31, JP32 and JP41 are used to select the
CPU voltage. Make sure they are set correctly. Please
refer to pages 2-42 and 2-43.
Installation Overview u 2-39
Page 50
PCI/ISA System Board
UMC U5SD
JRN1
1
JP42
JRN2
2
1
JP14
3
JP33
1
JRN3
JP34
JP35
JP36
1
1 2 3
UMC U5SD
123
JP26
Note:
Make sure Jumpers JP18, JP19 and JP21 are set correctly. The external CPU clock speed of the UMC U5SD
CPU is equal to its internal CPU clock speed. Please
refer to page 2-42.
Jumpers JP31, JP32 and JP41 are used to select the
CPU voltage. Make sure they are set correctly. Please
refer to pages 2-42 and 2-43.
2-40 u Installation Overview
Page 51
UMC U5S/U5SLV
G486VPA
JRN1
1
JP42
JRN2
2
1
JP14
3
JP33
1
JRN3
JP34
JP35
JP36
1
1 2 3
UMC U5S/U5SLV
123
JP26
Note:
Make sure Jumpers JP18, JP19 and JP21 are set correctly. The external CPU clock speed of the UMC U5S
or U5SLV CPU is equal to its internal CPU clock
speed. Please refer to page 2-42.
Jumpers JP31, JP32 and JP41 are used to select the
CPU voltage. Make sure they are set correctly. Please
refer to pages 2-42 and 2-43.
Installation Overview u 2-41
Page 52
PCI/ISA System Board
Jumpers JP18, JP19 and JP21
CPU External Clock Speed
These jumpers should be set to match the CPU external
clock speed.
External CPU
25 Mhz
Clock Speed
Internal CPU
25/50 Mhz
Clock Speed
Pentium ODP
63 Mhz 83 Mhz *
Internal Clock
Speed
1
JP18
JP19
JP21
2
3
1
2
3
1
2
3
* Default setting
Jumpers JP31, JP32 and JP41
CPU Voltage Select
5V CPUs:
33 Mhz * 40 Mhz
33/66/
40/80 Mhz 50 Mhz
100 Mhz *
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
50 Mhz
1
2
3
1
2
3
1
2
3
1
JP32
(Default setting)
2-42 u Installation Overview
2 3
JP31
2
1
JP41
6
5
Page 53
3.45V CPUs:
G486VPA
JP32
Intel 486 -
A80486DX4-100
A80486DX4-75
UMC -
U5SLV-SUPER25
U5SLV-SUPER33
Cyrix -
Cx486DX2-V50GP
3.6V CPUs:
JP32
Cyrix -
Cx486DX2-V66GP
1 2 3
2 3
1
JP31
JP31
2
1
6
5
JP41
AMD -
A80486DX4-100NV8T
A80486DX2-80NV8T
A80486DX2-66NV8T
A80486DX4-100SV8B
A80486DX4-75SV8B
A80486DX2-80SV8B
A80486DX2-66SV8B
Am486DX2-66V8T
Am486DX2-80V8T
Am486DX4-100V8T
2
1
6
5
JP41
4V CPUs:
JP32
Cyrix -
Cx486DX2-V80GP
2 3
1
JP31
2
1
6
5
JP41
Installation Overview u 2-43
Page 54
PCI/ISA System Board
Jumpers JP8, JP12, JP17, JP20, JP25, JP27 and JP28
The jumpers below are for factory testing only and
should always be set to their default configurations.
Reconfiguring these jumpers will cause problems with
your system board.
JP8: Off
JP12, JP17: 1-2 On
JP20: 1-2 On
JP25: 1-2 On
JP27: Off
JP28: 1-2 On
2-44 u Installation Overview
Page 55
Installing Upgrade CPUs
The G486VPA is equipped with a 237-pin Zero
Insertion Force (ZIF) socket at location U27 of the
system board. This socket enables you to remove the
old CPU and insert the upgrade CPU easily. If you
need to apply excessive force to insert the CPU, the
installation is being done incorrectly.
Warning:
Open the socket only if actually installing a CPU. The
warranty on the original CPU will be voided if the S/N
seal is broken. Installation of an OverDrive Processor
will not affect the original system warranty.
The 237-pin ZIF socket consists of the four rows of pin
holes on each side. To avoid improper installation, the
ZIF socket is designed with a Plug/Keying mechanism.
There are several holes in the socket that are plugged so
the CPU will only go in one way. If you are unable to
easily insert the CPU, please verify that pin 1 of the
CPU is being plugged into pin 1 of the socket. Pin one
is located as shown on the next page.
G486VPA
Caution:
You will need to change the CPU-type jumper settings.
(Please see the previous pages of this manual.)
Before proceeding with the upgrade, take note of the
following. The microprocessor and heat sink may be hot
if the system has been running. To avoid the possibility
of a burn, power the system off and let the processor
and heat sink cool for 10 minutes.
Installation Overview u 2-45
Page 56
PCI/ISA System Board
Clearance Requirements
The Pentium OverDrive processor comes with a heat
sink mounted on top. To maintain proper airflow once
the upgrade is installed on the system board, the
processor and heat sink require certain space clearances.
The clearance above the OverDrive processor's fan/heatsink must be at least 0.4 in. The clearance on at least 3
of 4 sides of the processor must be at least 0.2 in. The
cables (for floppy drive, hard drive CD-ROM, etc.) must
be routed clear of the CPU and its airspace.
Temperature Rating
The ambient or room temperature must be below 37°C
(99°F) for a system installed with the Pentium
OverDrive processor.
Zero Insertion Force (ZIF) Socket
2-46 u Installation Overview
Page 57
G486VPA
To install an upgrade CPU in the G486VPA, follow the
steps below.
1. Make sure the handle on the side of the ZIF socket
is up. To raise the handle, pull it out to the side a
little and raise it as far as it will go. The top plate
will slide back. Do not use screw drivers or other
tools to open the socket, or damage may occur to the
system or socket. It may be necessary to initially
apply a small amount of sideways force to free the
handle from its retaining “tab.” Once clear of the
“tab,” the lever will open easily.
Lifting the Handle
2. Once the lever is completely up, remove the old
CPU by carefully lifting it straight out of the socket.
You are now ready to insert the new CPU.
Installation Overview u 2-47
Page 58
PCI/ISA System Board
3. Position the CPU above the ZIF socket. Make sure
pin 1 of the CPU is aligned with pin 1 of the socket.
Lower the chip until the pins are inserted properly in
their corresponding holes. Remember that no force is
needed to install the CPU. If the CPU will not easily
insert, please verify you have pin 1 of the CPU
aligned with pin 1 of the socket. Applying too much
pressure can damage the CPU or the socket.
Pin 1 of the ZIF Socket
2-48 u Installation Overview
Page 59
G486VPA
Positioning the CPU Above the ZIF Socket
4. Push the handle down until the handle locks into its
place. Top plate will slide forward. You will feel
some resistance as the pressure starts to secure the
CPU in the socket. This is normal and will not
damage the CPU. However, if the handle is not
completely closed, damage to the CPU and/or
system board may result.
Fan Exhaust
The CPU must be kept cool by using a fan exhaust
configuration in connection with the heatsink. The
temperature of the air entering the fan/heatsink cannot
exceed 45°C.
In order to provide proper airflow to the CPU, all
movable obstructions (power supply cables, cards,
floppy disk cables) must be clear of the CPU heatsink/
fan component in accordance with the space clearance
discussed in the CPU installation section of this manual.
Installation Overview u 2-49
Page 60
PCI/ISA System Board
Built-in Ports
The G486VPA system board is equipped with two serial
ports, one ECP/EPP parallel printer port, one FDD
connector, two IDE hard disk connectors and one PS/2
mouse port.
CN3
PS/2
Mouse
Port
COM1
COM2J1J2
PC87332VF
Parallel Printer
Connector
J3 J5
Secondary IDE
Connector
Floppy Disk Drive
Connector
Primary IDE
Connector
SM4
SM3
SM2
SM1
J6J4
Locations of the Built-in Ports on the System Board
2-50 u Installation Overview
Page 61
Serial Ports
The built-in serial ports are RS-232C asynchronous
communication ports with 16C550-compatible UARTs
that can be used with modems, serial printers, remote
display terminals, and other serial devices. The
G486VPA system board supports IRQ4 for the primary
serial port and IRQ3 for the secondary serial port. These
serial ports use the following system I/O addresses:
G486VPA
Port Configuration
COM1
COM2
COM3/COM4
Connecting the Serial Ports
Two DB-9P serial port cables are provided with the
motherboard. They are mounted on a card-edge bracket
along with the PS/2 mouse cable. The upper serial port
cable should be used for the COM1 primary serial port;
connect it to Connector J1 on the motherboard. The
lower serial port cable should be used for the COM2
secondary serial port; connect it to Connector J2 on the
motherboard. Make sure the colored stripes on the
ribbon cables align with pin 1 of Connectors J1 and J2.
Mount the card-edge bracket to the system chassis.
I/O Address
3F8h
2F8h
3E8h/2E8h or Disable
Installation Overview u 2-51
Page 62
PCI/ISA System Board
Parallel Port
The G486VPA system board has a standard connector
for interfacing your PC to a parallel printer. This port is
compatible with both IBM AT printer ports and the
new, high speed, bi-directional Extended Capabilities
Port standard. The parallel port on your system board
can be set to any of the following system I/O addresses:
The Primary and Secondary Serial Ports
on the G486VPA System Board
Port Configuration I/O Address
LPT1 3BC-3BE Hex
LPT2* 378-37A Hex
LPT3 278-27A Hex
* Default setting
2-52 u Installation Overview
Page 63
Connecting the Parallel Printer Port
Attach the DB-25S printer port cable, which came with
the motherboard, to Connector J3 on the G486VPA
system board. Make sure the colored stripe on the
ribbon cable aligns with pin 1 of Connector J3. Use a
small nutdriver to mount the cable into a DB-25 cutout
in the system chassis.
G486VPA
The Parallel Printer Port on the G486VPA System Board
Installation Overview u 2-53
Page 64
PCI/ISA System Board
Floppy Disk Drive Controller
The G486VPA system board has a built-in floppy disk
controller that supports two standard floppy disk drives.
You can install any 360KB/720KB/1.2MB/1.44MB/
2.88MB floppy disk drives.
Connecting the Floppy Disk Cable
The Floppy Disk Connector on the
G486VPA System Board
Step 1
Install the 34-pin header connector into the floppy disk
connector (J5) on the system board. The colored edge of
the ribbon should be aligned to pin 1 of the J5 connector.
2-54 u Installation Overview
Page 65
Step 2
Install the other 34-pin header connector(s) into the disk
drive(s) with the colored edge of the daisy chained
ribbon cable aligned to pin 1 of the drive edge
connector(s). The end-most connector should be attached to the drive you want to be Drive A.
IDE Hard Disk Interface
The G486VPA system board is equipped with one VLBus IDE connector and one ISA IDE connector that will
interface four IDE (Integrated Drive Electronics) hard
disk drives. An IDE drive is a hard drive with the
controller electronics built into the disk assembly. The
integration of the controller and the drive as a single
unit increases both the reliability and performance by
eliminating redundant circuitry.
Note:
Only IDE drives can be connected to the IDE interface.
G486VPA
Installation Overview u 2-55
Page 66
PCI/ISA System Board
Connecting the IDE Hard Disk Interface
The IDE Hard Disk Connector on the
G486VPA System Board
Step 1
If you are connecting two hard drives, install the 40-pin
connector of the IDE cable into the primary disk connector (J6). If you are adding a third or fourth IDE
device, install the 40-pin connector of the other IDE
cable into the secondary connector (J4). Make sure the
colored edge of the ribbon is aligned to pin 1.
Step 2
Install the other 40-pin header connector(s) into the
device with the colored edge of the ribbon cable aligned
to pin 1 of the drive edge connector(s).
2-56 u Installation Overview
Page 67
Note:
Refer to your disk drive user's manual for information
about selecting proper drive switch settings.
Adding a Second IDE Hard Drive
When using two IDE drives, one must be set as the
master and the other as the slave. Follow the instructions provided by the drive manufacturer for setting the
jumpers and/or switches on the drives. No changes are
needed on the G486VPA system board when adding a
second hard drive.
We recommend that the IDE hard drives be from the
same manufacturer. In a few cases, drives from two
manufacturers will not function properly when used
together. The problem lies in the hard drives, not the
G486VPA system board.
Preparing an IDE Drive for Use
IDE disk drives are already low-level formatted, with
any bad-track errors entered, when shipped by the drive
manufacturer. Do not attempt to do a low-level format,
or you may cause serious damage to the drive.
G486VPA
To use an IDE drive, you need to enter the drive type
(this information is provided by the drive manufacturer)
into the system’s CMOS setup table. Then run FDISK
and FORMAT provided with DOS.
Note:
Do not run FDISK and FORMAT programs on a drive
that has already been formatted, or you will lose all
programs and data stored on the drive.
Installation Overview u 2-57
Page 68
PCI/ISA System Board
PS/2 Mouse Port
The PS/2 mouse port is a 6-pin connector on the
system board. Attach the 6-pin mouse port cable, which
came in the G486VPA box, to Connector CN3. Make
sure the brown wire on the PS/2 mouse connector aligns
with pin 1 of connector CN3. The other end of the wires
are attached to the card-edge bracket that also holds the
two serial port cables.
The PS/2 Mouse Port on the G486VPA System Board
2-58 u Installation Overview
Page 69
Installing Expansion Cards
The G486VPA is equipped with three dedicated PCI and
three dedicated ISA slots. One PCI slot and one ISA slot
is shared. You can only install a card in one or the other
of the shared slots at a time, you cannot install devices
in both slots. Due to the size of the CPU and heatsink/
fan component, card size is limited. Refer to the Features and Specifications section, page 1-4, for limitations. The location of the expansion slots are shown
below.
SM4
SM3
SM2
SM1
G486VPA
PCI 4
PCI 3
PCI 2
PCI 1
Master / Slave
Master / Slave
Master / Slave
Master / Slave
ISA SL1
ISA SL2
ISA SL3
ISA SL4 ISA SL8
PCI Slots
ISA SL5
ISA SL6
ISA SL7
Shared PCI/ISA Slot
ISA Slots
Installation Overview u 2-59
Page 70
PCI/ISA System Board
Note:
PCI3 and PCI4 are PCI Master slots and support
Master Cards. PCI and PCI2 share the function of the
third Master slot. If you insert a Master Card into one
of these slots (PCI1 or PCI2), then the other slot can
support Slave function only.
2-60 u Installation Overview
Page 71
Installing the System Board
Before installing the system board into your system unit,
you should prepare the tools you will need:
You will need:
• one medium size, flat-bladed screwdriver
• one medium Phillips screwdriver
Step 1
Unlock your system unit. Turn off the power and disconnect all power cords and cables.
Step 2
Remove the system unit cover. Refer to the manufacturer’s instructions if necessary.
Step 3
G486VPA
Step 4
Remove expansion cards seated in any of the expansion
slots and detach all connectors from the old system
board.
Loosen the screws holding the original system board and
remove the board from the system. Save the screws.
Installation Overview u 2-61
Page 72
PCI/ISA System Board
Step 5
Remove the G486VPA from its original packing box.
Be careful to avoid touching all connectors and pins on
the board. Please refer to the handling instructions on
pages 2-1 and 2-2 for proper handling techniques.
Step 6
Insert the HSIM modules into the SIMM banks on the
G486VPA. The quantity and location of the SIM
modules is dependent upon the memory configuration
and type of modules you intend to use.
Step 7
Set the corresponding jumpers.
Step 8
Install the prepared G486VPA system board into the
case and replace the screws.
Step 9
Reinstall all cards and connectors and replace the system unit cover. Reconnect all power cords and cables.
2-62 u Installation Overview
Page 73
v Initial Setup Program
After you power up your system, the BIOS message
appears on your screen and the memory count begins.
After the memory test, the following message will
appear on the screen:
Press DEL to enter Setup
If the message disappears before you respond, restart
your system or press the “Reset” button. You may also
restart the system by pressing the <Ctrl> <Alt> <Del>
keys. If you do not press these keys at the correct time
and the system does not boot, the following error message will appear:
Press Del to enter Setup
If you have set a password and selected “System” in the
Security Option of the BIOS Feature Setup menu, you
will be prompted for the password everytime the system
is rebooted or any time you try to enter Setup. Type in
the correct password and press <Enter>.
G486VPA
If you selected “Setup” in the Security Option, you will
be prompted for the password only when you try to
enter Setup. Refer to the “BIOS Features Setup” section
for more information.
Initial Setup Program u 3-1
Page 74
PCI/ISA System Board
Award BIOS CMOS Setup Utility
Press <Ctrl> <Alt> <Esc> or <Del> simultaneously to
enter the Setup utility. A screen similar to the one below
will appear.
Use the arrow keys to highlight the option you want and
press <Enter>.
Standard CMOS Setup
Use the arrow keys to highlight “Standard CMOS
Setup” and press <Enter>, a screen similar to the one on
the next page will appear.
3-2 u Initial Setup Program
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G486VPA
Date and Time
Sets the time and date for the system. Press <F3> for
the calendar.
Primary Master, Primary Slave, Secondary Master and
Secondary Slave
If you have added an IDE drive, you must select the
appropriate type for the drive. You may use the “IDE
HDD Auto Detection” from the main CMOS setup
menu or you can set it manually. The G486VPA has 46
pre-set types and one user-definable type. Use the <Page
Up> or <Page Down> keys to select the appropriate
type for the drive.
The table in Appendix G gives a complete listing of the
available drive types. Any given drive must be set to
one specific drive-type number. Please refer to your IDE
drive documentation to find the appropriate type number.
Initial Setup Program u 3-3
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PCI/ISA System Board
If none of the pre-set types is appropriate for your drive,
choose “User”, which is the user-definable type. To use
this type, highlight either the drive you want to set:
Primary Master, Primary Slave, Secondary Master or
Secondary Slave. Use the arrow keys until type “User”
is showing. Fill in all the parameters as specified by the
drive manufacturer. If a drive is not installed, select
“None” and press <Enter>.
Drive A and Drive B
These options are used to select the type of floppy disk
drives installed in your system. If either of the drives is
not present, select “None”. Make sure you choose the
correct drive type; otherwise, your system might format
the device improperly.
Video
This is used to select the type of video adapter installed
in your system.
Halt on
The system will halt if an error is detected during power
up.
No Errors: The system boot will not stop for any
detected errors.
All Errors: The system will stop whenever the
BIOS detects a non-fatal error.
All, But Keyboard: The system will stop for any
All, But Diskette: The system will stop for any
3-4 u Initial Setup Program
errors except a keyboard error.
errors except a disk error.
Page 77
All, But Disk/Key: The system will stop for any
Memory
The lower right hand corner shows the base memory
size, extended memory size, and the other memory size
of your system. You cannot alter these items; your
computer automatically detects and displays them.
The Other Memory size refers to the memory located in
the 640K to 1024K address space. This is the memory
used for different applications. DOS uses this area to
load device drivers to keep as much base memory free
for application programs.
When you are through making changes in the Standard
CMOS Setup, press <Esc> to return to the main menu.
BIOS Features Setup
Use the arrow keys to highlight “BIOS Features Setup”
and press <Enter>, a screen similar to the one on the
next page will appear.
G486VPA
errors except a keyboard or disk
error.
Initial Setup Program u 3-5
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PCI/ISA System Board
The Virus Warning option may be set to “enabled” or
“disabled”. When enabled, the BIOS issues a warning
when any program or virus sends a Disk Format command or attempts to write to the boot sector of the hard
disk drive.
If you choose “System” in the Security Option, you will
be prompted for a password every time you cold boot
your system or access setup. If you choose “Setup”, you
will be prompted for a password only when trying to
access setup.
If the changes you made are incorrect or you change
your mind, press <F6> or <F7> to return to the default
settings. Press <Esc> after making the changes to return
to the main menu.
3-6 u Initial Setup Program
Page 79
Chipset Features Setup
The G486VPA uses VIA chipset. The Chipset Features
Setup allows you to modify some functions to optimize
system performance. It also allows you to enable, disable or select the port address of the built-in serial ports,
parallel port, floppy disk controller and hard disk controller.
If you press <Enter>, a screen similar to the one below
will appear.
G486VPA
Use the arrow keys to move the highlight bar to the
option you wish to change or modify. Use the <Page
Up>, <Page Down>, <+> or <-> keys to make the
corresponding changes.
If the changes you made are incorrect or you change
your mind, press <F6> or <F7> to return to the default
settings. Press <Esc> after making the changes to return
to the main menu.
Initial Setup Program u 3-7
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PCI/ISA System Board
Power Management Setup
Use the arrow keys to highlight the “Power Management
Setup” and press <Enter>. A screen similar to one
below will appear
Choosing “Enabled” in the Power Management option
will allow you to set Doze Timer, Sleep Timer and
Sleep Mode. This will enable your system to reach one
of the following power saving stages: Ready, Doze or
Suspend. Choose “Disabled” if you do not want your
system to enter the power saving mode.
3-8 u Initial Setup Program
Page 81
PCI Configuration Setup
Use the arrow keys to highlight “PCI Configuration
Setup” and press <Enter>, a screen similar to the one
below will appear.
The G486VPA system board supports four PCI slots.
Each slot may be assigned INT value if the card installed in the slot requires an interrupt. Each INT may
then be assigned an IRQ value.
G486VPA
Initial Setup Program u 3-9
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PCI/ISA System Board
Load BIOS Defaults
If, for some reason, the CMOS becomes corrupted,
the system can be reconfigured with the default values
stored in the ROM chips. The BIOS default values
provide the slowest performance for your system. You
should use these values only if you are having hardware
problems.
Highlight this option on the main menu and press
<Enter>. The message below will appear.
Load BIOS Defaults (Y/N)? N
Type “Y” and press <Enter> to load the BIOS setup
default values. After pressing <Enter>, you will be
returned to the main menu.
Load Setup Defaults
The Setup default values are the very stable and should
be selected as standard values for your system.
Highlight this option on the main menu and press
<Enter>. The message below will appear.
Load Setup Defaults (Y/N)? N
Type “Y” and press <Enter> to load the Setup default
values. After pressing <Enter>, you will be returned to
the main menu.
To configure your system for optimum performance,
you must reset the options under the Chipset Features
setup. You are advised to do so only under the instruction of a technical engineer, otherwise, failure may
occur.
3-10 u Initial Setup Program
Page 83
Password Setting
If you want to set a password, make sure that the Security Option under the BIOS Features Setup is set to
“System” or “Setup” (see page 3-6).
The main screen of the Setup utility allows you to set
two types of password, Supervisor Password and User
Password.
Supervisor Password
Set a supervisor's password with “System” option
selected if you want to protect your system and setup
from unauthorized entry.
If you set a supervisor's password when “Setup” option
is selected under the BIOS Features Setup, only access
to setup will be denied when incorrect password is
entered. You will not be prompted for a password when
you cold boot the system.
G486VPA
Use the arrow keys to highlight the “Supervisor Password” option and press <Enter>. The message below
will appear.
Enter Password:
Type in the password. You are limited to eight characters. Type in a password that is eight characters long or
shorter. When done, the message below will appear:
Confirm Password:
You are asked to verify the password. Type in exactly
the same password. If you type in a wrong password,
Initial Setup Program u 3-11
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PCI/ISA System Board
you will be prompted to enter the correct password
again. Otherwise, enter a new password.
To delete or disable the password function, simply press
<Enter> instead of typing in a new password. Press the
<Esc> key to return to the main menu.
If you forget your password, you should clear any
previously set password by setting Jumper JP2 pins 2
and 3 to On for approximately two minutes. Please refer
to page 2-11 for more information.
User Password
Set a user's password with “System” option selected if
you want another user to have access only to your
system but not to setup. Using user's password to enter
Setup allows a user to access only “User Password”
option that appears on the main screen. Access to all
other options is denied.
If you want to set a user's password when “Setup”
option is selected under the BIOS Features Setup, a user
will be prompted to enter a password only when trying
to access setup. If the correct password is entered, a user
will be able to access only “User Password” option that
appears on the main screen.
To set, confirm, verify, disable or delete a user's password, follow the procedure described in the section
above, “Supervisor Password”. If you forget your password, refer to the procedure described in the same
section.
3-12 u Initial Setup Program
Page 85
IDE HDD Auto Detection
This option detects the hard disk parameters for the hard
disk drives installed in your system. Highlight this
option and press <Enter>. A screen similar to the one
below will appear.
G486VPA
The screen displays the parameters detected and allows
you to accept or reject the parameters. Type “Y” and
press <Enter> to accept the parameters or press <Esc>
to abort. If you select “Y”, the parameters of the hard
disk will be displayed in the Standard CMOS Setup.
Initial Setup Program u 3-13
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PCI/ISA System Board
Save & Exit Setup
When all the changes have been made, highlight “Save
& Exit Setup” and press <Enter>. The message below
will appear:
Save to CMOS and Exit (Y/N)? N
Type “Y” and press <Enter>. The following message
will appear:
Type “Y” and press <Enter>. The modifications you
have made will be written into the CMOS memory, and
the system will reboot. You will once again see the
initial diagnostics on the screen. If you wish to make
additional changes to the setup, press <Ctrl> <Alt>
<Esc> or <Del> simutaneously after memory testing is
done.
Exit Without Saving
Reboot System (Y/N)? N
When you do not want to save the changes you have
made, highlight this option and press <Enter>. The
message below will appear:
Quit Without Saving (Y/N)? N
Type “Y” and press <Enter>. The system will reboot
and you will once again see the initial diagnostics on the
screen. If you wish to make any changes to the setup,
press <Ctrl> <Alt> <Esc> or <Del> simutaneously after
memory testing is done.
3-14 u Initial Setup Program
Page 87
v IDE Device Drivers
The G486VPA system board uses the VT82C496G and
NS PC87332VL IDE chips that support two IDE channels: 1Fx channel (Primary IDE Channel) and 17x
channel (Secondary IDE Channel). The IDE device
drivers should be installed under the “INSTALL.EXE”
Utility.
The G486VPA comes with one PCI IDE driver diskette.
The “VT82C496G VLB Device Drivers” diskette includes drivers for Microsoft Windows 3.1 and 3.11,
Windows NT 3.1 and 3.5, OS/2 2.x and 3.0, Novell
NetWare 3.11 and 4.0x, SCO UNIX 3.2.4.
Note:
If you are using VT82C496G VLB IDE driver, Block
Transfer Mode Option in the System BIOS must be
turned off.
“INSTALL.EXE” Utility
G486VPA
“INSTALL.EXE” should be used after you have installed the VIAIDE card in your system.
To run the “INSTALL.EXE” Utility, under DOS prompt
type:
A> INSTALL
IDE Device Drivers u 4-1
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PCI/ISA System Board
The Main Screen appears allowing you to choose one of
1. <F1>: Help - Press <F1> to get a help message
2. <Enter>: Continue - Pressing <Enter> lets you con-
tinue the setup utility.
3. <Esc>: Quit - Press <Esc> to exit the setup utility.
Note that if you press <Enter> while the installation
is in progress, you will exit the installation procedure and the IDE drivers will not be successfully
installed.
Press <Enter> to proceed with the installation, then
select one of the following options:
1. <F1>: Help - Press <F1> to get a help message
2. <F2>: Full Installation - When chosen, this option lets
you install all of the VT82C496G VLB IDE device
drivers. These are: Windows and NetWare drivers.
the following options:
3. <F3>: Customized Installation - This option allows
you to choose which one of the VT82C496G VLB
IDE device drivers you want to install. Refer to the
following chapters for more information.
4. <Esc>: Quit - Press <Esc> to exit the setup utility or
to discontinue the installation process.
Press <F2> to proceed with the Full Installation. When
it has been completed, press <Esc> to exit the Utility.
4-2 u IDE Device Drivers
Page 89
Customized Installation
When you press <F3>, these options appear on the
screen:
1. <F1> - Install Windows Driver
2. <F2> - Install NetWare Driver
3. <Esc> - Quit
The following is the description of the first two options.
Installing the Windows 3.1, 3.11 Driver
To install:
Note that the VT82C496G VLB IDE DOS driver should
be installed to support the extra DOS functions before
you enter Windows System.
The customized installation screen gives you an option
to install the Windows driver by pressing <F1>.
G486VPA
After pressing <F1>, the Utility prompts you to enter the
name of directory for the driver you want to install. If
you press <Enter>, the driver will be installed under the
default directory.
You will be also prompted to type a file name that is
going to replace the original SYSTEM.INI. If you
choose not to enter the new file name, the default name,
SYSTEM.VIA, will be used.
IDE Device Drivers u 4-3
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PCI/ISA System Board
If you have not turned on the 32bit disk access mode,
the Utility will add new lines under CONFIG.SYS. The
new lines are as follows:
The Windows driver supports 32bit disk access mode
which enables you to optimize your access speed. The
Windows driver will be copied from the diskette to the
destination directory.
The default IRQ for the second IDE channel is IRQ15.
If you have an IDE card that uses IRQ11 and second
IDE channel, you should adjust the IRQ value by typing
the following line under SYSTEM.INI section (386Enh):
The default IRQ15 is replaced by IRQ11.
device=c:\windows\system\viaide.386
32BitDiskAccess=ON
VIA_IRQ=11
To remove:
When you install the Windows driver, the original
SYSTEM.INI under the Windows directory will be
renamed to SYSTEM.VIA.
1. Delete SYSTEM.INI
2. Rename SYSTEM.VIA to SYSTEM.INI
3. Restart Windows.
4-4 u IDE Device Drivers
Page 91
Installing the NetWare 3.11, 4.0x Driver
To install:
Press <F2> to install the NetWare driver.
The Utility will prompt you to enter the name of direc-
tory for the NetWare driver you want to install. If you
press <Enter>, the driver will be installed under the
default directory.
The NetWare driver can only support the first IDE
channel (VT82C496G). The second IDE channel can be
supported by NetWare ISA disk. To load the ISA disk
and change IRQ value, follow the installation procedures of the NetWare installation manual. The default
IRQ for the second IDE channel is IRQ15.
After the installation, you can type “load” command to
load the driver into NetWare.
Installing the OS/2 2.x, 3.0 Driver
G486VPA
To install:
To find the disk speed, run “VTSETUP.EXE” Utility
under DOS.
After you have executed the speed test, boot the system
from OS/2. Under OS/2 command prompt, type
<DDINSTAL>. For example:
C>DDINSTAL
IDE Device Drivers u 4-5
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PCI/ISA System Board
Enter the source floppy drive from which OS/2 drive is
to be copied. Enter the destination disk drive.
VIAIDE.ADD will be copied to the destination drive.
The following line will be appended to CONF.SYS file:
Modify CONFIG.SYS file by moving the line:
in front of the name of the default OS/2 hard disk
driver:
If you do not complete this modification, the device
driver IMB1S506.ADD will be executed instead of
VIAIDE.ADD driver.
After completing the above mentioned procedures, the
OS/2 driver is installed.
BASEDEV=VIAIDE.ADD
BASEDEV=VIAIDE.ADD
BASEDEV=IBM1S506.ADD
The default IRQ value for the second IDE driver is
IRQ15. If you want to change this value to IRQ11,
type:
BASEDEV=VIAIDE.ADD /A:1 /IRQ:11
4-6 u IDE Device Drivers
Page 93
To remove:
1. Remove the driver setting by deleting
BASEDEV=VIAIDE.ADD in your C:\CONFIG.SYS
file.
2. Reboot the system.
Installing the SCO UNIX 3.2.4 Driver
To install:
You should prepare a blank diskette, 1.2MB (5.25") or
1.44MB (3.5"), to complete the installation. Follow
these steps to convert the “VT82C496G VLB IDE
Device Drivers” diskette, which is prepared with DOS
format, into a SCO UNIX custom installable diskette.
1. Login to SCO UNIX by typing:
login : root
2. Insert the “VT82C496G VLB IDE Device Drivers”
diskette into a floppy drive.
G486VPA
3. Under SCO UNIX prompt “#”, type the following
commands:
# doscp /dev/fd0135ds18:/unix/install /tmp <1.44MB 3.5" drive>
# sh /tmp/install
or
# doscp /dev/fd096ds15:/unix/install /tmp <1.2MB 5 1/4" drive>
# sh /tmp/install
IDE Device Drivers u 4-7
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PCI/ISA System Board
This procedure has provided you with an SCO UNIX
custom installable diskette that you should use to install
“VT82C496G VLB IDE Device Driver” to your SCO
Unix using the custom command. Follow these steps:
1. Insert the SCO Unix custom installable diskette into
a floppy drive.
2. Type: # custom
3. Follow the installation instructions and rebuild the
kernel.
If you wish to install the IDE drivers for the secondary
IDE channel (channel 17x), execute the following
commands to extract the major number:
For example, if you get the major number “24”, you can
make the nodes for the 17x drivers in the following
way:
# configure -j vth1
1. For the drive 0 of the channel 17x:
# mknod /dev/mio0 b 24 40
2. For the drive 1 of the channel 17x:
# mknod /dev/mio1 b 24 104
IRQ15 is the default IRQ value for the secondary IDE
channel. Use this method to change the IRQ value:
4-8 u IDE Device Drivers
Page 95
1. Edit the file /etc/conf/pack.d/vth1/space.c to change
the define IRQ number 15 to 11 in the following
way:
#define WD1_0_VECT 11
2. Relink the kernel by typing:
# /etc/conf/cf.d/link_unix
3. Use the kernel as the boot kernel.
To remove:
Follow the instructions about removing “VIA VESA/
IDE Device Driver” and rebuild the kernel.
Installing the Windows NT 3.1, 3.5 Driver
To install:
The Windows NT driver can be installed using two
methods. The first method is to install the IDE Windows
NT driver at the Windows NT setup time. The second
one is to install the IDE Windows driver after the
system setup. The first method is recommended because
if you do not install the IDE Windows NT driver at the
Windows NT setup time, Windows NT system will not
boot properly. In that case, you should disable the
onboard IDE and plug in a non-enhanced IDE to boot
Windows NT. Install the VT82C496G Windows NT
driver using the second installation method. Then shut
down the system and enable the onboard IDE to boot
Windows NT.
G486VPA
IDE Device Drivers u 4-9
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PCI/ISA System Board
The First Installation Method
To install:
After booting your system from Windows NT setup
floppy drive, the “Welcome to Setup” screen will be
displayed. Press <Enter> to continue the setup procedure.
After pressing <Enter>, you are prompted to choose a
setup method. The following two methods are given:
1. Express Setup
2. Custom Setup
Select the “Custom Setup” method by typing “C”.
The system will start scanning for SCSI adapters. All
the SCSI adapters found will be displayed on the
screeen. If you want to configure additional SCSI adapters, type “S”. Navigate the light bar to select the option
“Other (Requires disk provided by a hardware manufacturer)”. Insert the “VT82C496G VLB IDE Device
Drivers” diskette into a floppy drive and press <Enter>.
Once the “VIA VT82C496G” device driver is recognized by Windows NT, press <Enter> to continue the
setup.
After the “VIA VT82C496G” device driver setup, the
device driver will be displayed on the previous SCSI
adapters screen. Press <Enter> to continue Windows NT
Setup. Follow the Windows NT procedure to install the
rest of the Windows NT drivers.
4-10 u IDE Device Drivers
Page 97
To remove:
The first installation method cannot be removed.
The Second Installation Method
To install:
To install the IDE Windows NT driver, follow these
steps:
1. Under the Main window select the Windows NT
Setup icon.
2. Choose the “Options” menu.
3. Navigate the light bar to select the “Add/Remove
SCSI Adapters” option. Click the “Add” button and
the “Setup Message” box will appear. Click the
“OK” button to continue the installation.
4. Pull down the “Adapter” menu and navigate the
light bar to select the “Other (Requires a disk from a
hardware manufacturer)” option.
G486VPA
5. Insert the “VT82C496G VLB IDE Device Drivers”
diskette into a floppy drive.
6. Change the path to: A:\nt. Click the “OK” button and
the “Select OEM Option” message box will appear.
The “VIA VT82C496G” item will be displayed.
Click the “OK” button again.
IDE Device Drivers u 4-11
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PCI/ISA System Board
7. At the “Select SCSI Adapter Option” message box,
click the “Install” button and then the “Continue”
button to complete the installation.
8. Reboot the system.
Note:
IRQ15 is the default IRQ value for the secondary IDE
channel. It cannot be changed.
To remove:
1. Under the Main window select the Windows NT
Setup icon.
2. Choose the “Options” menu.
3. To remove the Windows NT driver, navigate the
light bar to select the “Add/Remove SCSI Adapters”
option.
4. Navigate the light bar to select the SCSI Adapter
“VIA VT82C496G”. Click the “Remove” button.
The “Setup Message” message box will appear.
5. Click the “OK” button to continue the procedure.
To disable:
To disable the Windows NT driver installed after the
system setup, follow this procedure:
1. Under the Main window select the Control Panel
icon.
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G486VPA
2. Choose the “Devices” menu.
3. Navigate the light bar to select the “vtdisk” Device
and then click the “Startup” button.
Note:
At this stage you can apply another method that would
allow you to disable the Windows NT driver. Instead of
selecting “vtdisk” from the “Devices” menu, you can
choose “OEMSCSI”. Click the “Startup” button and
then proceed with step four.
4. Change “Startup Type” from “Boot” to “Disable”,
then click the “OK” button to complete the procedure.
IDE Device Drivers u 4-13
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PCI/ISA System Board
v Troubleshooting Checklist
If you experience difficulty with the G486VPA system
board, please refer to the checklist below. If you still
cannot isolate the problem, please contact your dealer.
1) Check the jumper settings to ensure that the jumpers
are properly set. If in doubt, refer to the “Board
Configuration” section.
2) Verify that all SIM modules are seated securely into
the bank sockets.
3) Make sure that the SIM modules are in the correct
locations.
4) Check that all populated memory banks are filled
with valid size SIM modules.
5) If your board fails to function, place the board on a
flat surface and seat all socketed components (gently
press each component into the socket).
6) If you made changes to the BIOS settings, re-enter
setup and load the BIOS defaults.
7) Check if the internal battery needs to be replaced.
The internal battery is located beside the slot PCI3
and just above the Flash EPROM.
5-1 u Troubleshooting Checklist
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