Casio G486VPB User Manual
G486VPB
Rev. 0+
System Board
User’s Manual
- D28750815 -
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 G486VPB 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.
PCI/ISA System Board
v Table of Contents v
Introduction ........................................................................................ 6
Features and Specifications ...................................................... 7
Package Checklist ..................................................................... 9
Installation Overview ........................................................................10
Preparing the Area .............................................................................10
Handling the System Board .....................................................10
Tips in Handling the System Board ...............................11
Hardware Installation ............................................................... 12
Installation Procedures ..................................................12
Locations of Jumpers ..........................................13
Cache Configuration ............................................14
Jumper Setting for Cache Memory ...........16
CPU Installation ...................................................17
Jumpers for CPU Voltage Select ..............19
Jumpers for CPU External Clock Select ...20
Jumpers for CPU Type Select ..................21
Installing Upgrade CPU .............................32
Memory Installation ............................................. 37
Installing the Modules ................................39
Other jumper settings (Internal Battery Select,
CMOS clean Select, EPROM Type,
PS/2 Mouse, CPU External Clock Speed
for PCI Slots, ECP DMA Channel Select) .40
Installing the System Board ................................ 45
Built-in Ports ........................................................47
Serial Ports ............................................... 48
Parallel Ports .............................................49
Floppy Disk Drive Controller .....................51
IDE Hard Disk Interface ............................52
PS/2 Mouse Port .......................................55
Installing Expansion Cards ..................................56
4
G486VPB
Initial Setup Program .......................................................................57
Award BIOS CMOS Setup Utilities .....................................................58
Standard CMOS Setup .......................................................................58
BIOS Features Setup .....................................................61
Chipset Features Setup .................................................63
Power Management Setup .............................................64
PCI Configuration Setup ................................................65
Load BIOS Defaults .......................................................66
Load Setup Defaults ......................................................66
Password Setting ...........................................................67
Supervisor Password ...........................................67
User Password .....................................................68
IDE HDD Auto Detection ...............................................69
Save & Exit Setup ..........................................................70
Exit Without Saving ........................................................70
IDE Device Drivers ........................................................................... 71
Troubleshooting Checklist ...............................................................72
Appendix A: Types of Modules ...............................................74
Appendix B: System Error Report ..........................................76
Appendix C: Memory & I/O Maps ...........................................81
Appendix D: PCI I/O Pin Assignments ...................................83
Appendix E: ISA I/O Pin Assignments ...................................84
Appendix F: Connector Pin Assignments .............................85
Appendix G: Award BIOS Hard Disk Table .............................95
5
PCI/ISA System Board
v Introduction
The G486VPB 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 G486VPB is an Energy Star compliant system
board that supports the Environmental Protection
Agency's Green PC requirements. It reduces energy
consumption by automatically turning off peripherals
when not in use.
The G486VPB system board supports a 237-pin Zero
Insertion Force (ZIF) CPU socket that allows users to
easily upgrade their CPUs. It also supports an optional
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 G486VPB is equipped with four PCI slots, four ISA
slots (one shared PCI/ISA slot).
Equipped with one built-in VL-bus IDE connector and
one ISA IDE connector, the G486VPB system board can
control four drives and supports fast Mode 4 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 optional mini-DIN-6 connector for the PS/2
mouse.
The G486VPB can support 1MB to 128MB of memory
using 256Kx36, 512Kx36, 1Mx36, 2Mx36, 4Mx36,
8Mx36 and 16Mx36 72-pin SIM modules.
6
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
486DX4-75/100 SV8B
Cyrix 486DX2V-50/66/80
486DX4-100
5x86-100
Chipset
• VIA - VT82C496G - system and cache controller
VT82C505 - Host to PCI bridge
VT82C406 - peripheral chip
G486VPB
TM
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 1.1 compliant
• EPA Energy Star compliant design
7
PCI/ISA System Board
BIOS
• Award system BIOS (Flash EPROM optional)
• Supports IDE HDDs larger than 528MB under DOS
(LBA mode only)
• System and EGA/VGA BIOS shadow
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, and 1.44MB floppy
drives
• Two fast IDE connectors:
Primary IDE connector provides a VL-bus IDE
Secondary IDE connector provides an ISA IDE
Cache Memory
• 128KB, 256KB, or 512KB
• Supports Level 1 and Level 2 write-back/
write-through cache
interface to support up to two Mode 4
enhanced HDDs
Interface to support an ATAPI compliant
CD-ROM or a tape drive
Memory Onboard
• 1MB to 128MB
• Two 72-pin SIMM sockets
• Supports memory parity check function
• Supports 256KBx36, 512KBx36, 1MBx36,
2MBx36, 4MBx36, 8MBx36 and 16MBx36 SIMMs
Expansion Slots
• Three PCI slots
• One shared PCI/ISA slot
• Three 16-bit ISA slots
8
CPU Socket
• 237-pin ZIF socket (Intel Socket 3)
Board Dimensions
• 22cm (8.58") x 22cm (8.58")
Baby AT form factor
PCB
• 4 layers
Package Checklist
The G486VPB package contains the following items:
• The G486VPB system board
• The G486VPB 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
G486VPB
If any of these items are missing or damaged, please
contact your dealer or sales representative for assistance.
9
PCI/ISA System Board
v Installation Overview
This chapter summarizes the steps in installing the
G486VPB system board into your system unit.
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.
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.
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 G486VPB 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.
10
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.
G486VPB
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.
11
Hardware Installation
Installation Procedures
Cache configration
CPU installation
Memory modules installation
Other jumper settings
Installing the system board
Built-in Ports
Expansion cards installation
Initial Setup Program
Locations of Jumpers on the G486VPB
PCI/ISA System Board
Cache Configuration
The G486VPB system board can be configured to three
different cache sizes: 128KB (default size), 256KB, and
512KB. Regardless of the amount of cache memory
installed, one 8Kx8 or 32Kx8 is needed for tag RAM to
store the cacheable addresses. The locations of the
SRAM sockets and Jumpers JP10-JP14 on the system
board are shown below.
Locations of the SRAM Sockets and Jumpers JP10-JP14
on the G486VPB System Board
14
G486VPB
To upgrade from 256KB to 512KB of cache memory,
use four pieces of 128Kx8 SRAM.
Cache Size
512KB
256KB
128KB*
* Default setting
↑
Pin 1
Data SRAM
U4/U5/U9/U10
128Kx8x4
64Kx8x4
32Kx8x4
64KX8 or 128Kx8
8KX8 or 32Kx8
SRAM Socket
Tag SRAM
U21
32Kx8x1
32Kx8x1
8Kx8x1
Cacheable
Range
128MB
64MB
32MB
15
PCI/ISA System Board
Jumper Setting for Cache Memory
Please refer to the figure on page 14 for the locations of
Jumpers JP10, JP11, JP12, JP13 and JP14.
128KB* Cache SRAM (Default)
JP12
JP11
JP10
JP13
JP14
1
2
3
256KB Cache SRAM
JP11
JP10
1
2
3
512KB Cache SRAM
JP11
JP10
1
2
3
1
2
3
JP12
JP13
JP14
1
2
3
JP12
JP13
JP14
1
2
3
16
CPU Installation
Get detail information
Set the Voltage setting jumpers
Set the external clock speed
Set the CPU jumpers
Insert your CPU into ZIF socket
G486VPB
of your CPU
jumpers
The G486VPB is equipped with a 237-pin Zero Insertion Force (ZIF) socket at location U17 (please refer to
the next page) 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.
17
PCI/ISA System Board
U17
Locations of ZIF Socket, Jumpers
JP6 - JP7, JP9 , JP15 - JP20, JP21, JP23 - JP30 and JRN1 - JRN3
on the G486VPB System Board
18
Jumpers JP21, JP23 and JP24
CPU Voltage Select
5V CPUs * 3.45V CPUs
2
1
JP21
6
5
JP24
1 2 3
JP23
2
1
JP21
6
5
JP24
G486VPB
1 2 3
JP23
JP21 Off and
JP23, JP24 1-2 On:
5V (Default)
5V CPUs:
Intel 486SX/DX/DX2
SX-S/DX-S/DX2-S
DX4 OverDrive
Pentium OverDrive
AMD Am486DX/DXL/DXL2
Cyrix 486SX/DX/DX2
SGS Thompson ST486DX2
3.45V CPUs:
Intel 486DX4
AMD Am486DX2/DX4 NV8T
Am486DX2/DX4 SV8B
UMC U5SD
Cyrix 486DX2-V50
486DX4-100
5x86-100
3.6V CPUs 4V CPUs
2
1
JP21
6
5
JP24
2
2 3
1
JP23
1
JP21
JP21 3-4 On and
JP23, JP24 2-3 On:
3.6V
JP21 1-2 On and
JP23, JP24 2-3 On:
3.45V
6
5
2 3
1
JP24
JP21 5-6 On and
JP23, JP24 2-3 On:
4.0V
JP23
3.6V CPUs:
Cyrix 486DX2-V66
4V CPUs:
Cyrix 486DX2-V80
19
PCI/ISA System Board
Jumpers JP15, JP17 and JP19
CPU External Clock Selection
25MHz
JP19
JP17
JP15
40MHz
JP19
JP17
JP15
1
2
3
JP15 2-3 On, JP17 1-2 On
and JP19 2-3 On:
25MHz
1
2
3
JP15 1-2 On, JP17 1-2 On
and JP19 2-3 On:
40MHz
33MHz *
JP19
JP17
JP15
1
2
3
JP15 2-3 On, JP17 2-3 On
and JP19 1-2 On:
33MHz (Default)
50MHz
JP19
JP17
JP15
1
2
3
JP15 1-2 On, JP17 2-3 On
and JP19 1-2 On:
50MHz
External 25MHz 33MHz * 40MHz 50MHz
CPU Clock Speed
Internal 25/50MHz 33/66/100MHz 40/80MHz 50MHz
CPU Clock Speed
Pentium OverDrive 63MHz 83MHz
Internal Clock Speed
20
Jumper Settings for CPU Type Select
Intel 486SX
G486VPB
Pin 1
21
PCI/ISA System Board
Intel 486DX/DX2 * (Default)
Pin 1
22
Intel DX4
G486VPB
Pin 1
23
PCI/ISA System Board
Intel DX4 OverDrive / Pentium OverDrive
Pin 1
24
AMD Am486DX2 SV8B
G486VPB
Pin 1
25
PCI/ISA System Board
AMD Am486DX2 NV8T
Pin 1
26
AMD Am486DX4 SV8B / Am486DX4 NV8T
G486VPB
Pin 1
27
PCI/ISA System Board
UMC U5SD
Pin 1
28
UMC U5S / U5SLV
G486VPB
Pin 1
29
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