DFI G486VPA User Manual
G486VPA
Rev. A +
System Board
User’s Manual
- D26450623 -
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.
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.
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
G486VPA
321
2-3 On: PS/2 Mouse
Disabled (Default)
321
1-2 On: PS/2 Mouse
Enabled
Installation Overview u 2-13
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
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
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
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
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
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
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
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