Casio Computer Hardware G486VPB User Manual

G486VPB  
Rev. 0+  
System Board  
User’s Manual  
- D28750815 -  
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 interfer-  
ence 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 recep-  
tion, 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:  
Appendix B:  
Appendix C:  
Appendix D:  
Appendix E:  
Appendix F:  
Appendix G:  
Types of Modules ...............................................74  
System Error Report ..........................................76  
Memory & I/O Maps ...........................................81  
PCI I/O Pin Assignments ...................................83  
ISA I/O Pin Assignments ...................................84  
Connector Pin Assignments .............................85  
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
G486VPB  
Features and Specifications  
Processor  
5V CPUs  
Intel 486SX/DX/DX2 (full series) and PentiumTM  
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  
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  
interface to support up to two Mode 4  
enhanced HDDs  
Secondary IDE connector provides an ISA IDE  
Interface to support an ATAPI compliant  
CD-ROM or a tape drive  
Cache Memory  
128KB, 256KB, or 512KB  
Supports Level 1 and Level 2 write-back/  
write-through cache  
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
G486VPB  
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  
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  
G486VPB  
Static electrical discharge can damage computer compo-  
nents 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.  
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.  
Data SRAM  
U4/U5/U9/U10  
Tag SRAM  
Cacheable  
Range  
Cache Size  
U21  
512KB  
256KB  
128KB*  
128Kx8x4  
64Kx8x4  
32Kx8x4  
32Kx8x1  
32Kx8x1  
8Kx8x1  
128MB  
64MB  
32MB  
* Default setting  
64KX8 or 128Kx8  
8KX8 or 32Kx8  
Pin1  
SRAM Socket  
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
1
2
3
256KB Cache SRAM  
JP12  
JP12  
JP13  
JP14  
JP11  
JP10  
1
2
3
1
2
3
512KB Cache SRAM  
JP11  
JP10  
JP13  
JP14  
1
2
3
1
2
3
16  
G486VPB  
CPU Installation  
Getdetailinformation  
ofyourCPU  
SettheVoltagesettingjumpers  
Settheexternalclockspeed  
jumpers  
SettheCPUjumpers  
InsertyourCPUintoZIFsocket  
The G486VPB is equipped with a 237-pin Zero Inser-  
tion Force (ZIF) socket at location U17 (please refer to  
the next page) of the system board. This socket is de-  
signed 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  
G486VPB  
Jumpers JP21, JP23 and JP24  
CPU Voltage Select  
5VCPUs*  
3.45VCPUs  
2
6
5
2
6
5
1
1
1
2
3
1
2
3
JP23  
JP23  
JP21  
JP21  
JP24  
JP24  
JP211-2Onand  
JP21Offand  
JP23,JP242-3On:  
JP23,JP241-2On:  
3.45V  
5V(Default)  
5V CPUs:  
3.45V 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  
Intel 486DX4  
AMD Am486DX2/DX4 NV8T  
Am486DX2/DX4 SV8B  
UMC U5SD  
Cyrix 486DX2-V50  
486DX4-100  
5x86-100  
3.6VCPUs  
4VCPUs  
2
6
5
2
6
5
1
1
1
2
3
1
2
3
JP23  
JP23  
JP21  
JP21  
JP24  
JP24  
JP213-4Onand  
JP215-6Onand  
JP23,JP242-3On:  
JP23,JP242-3On:  
3.6V  
4.0V  
3.6V CPUs:  
4V CPUs:  
Cyrix 486DX2-V66  
Cyrix 486DX2-V80  
19  
PCI/ISA System Board  
Jumpers JP15, JP17 and JP19  
CPU External Clock Selection  
25MHz  
33MHz*  
JP19  
JP17  
JP15  
JP19  
JP17  
JP15  
1
2
3
1
2
3
JP152-3On, JP171-2On  
andJP192-3On:  
25MHz  
JP152-3On, JP172-3On  
andJP191-2On:  
33MHz(Default)  
40MHz  
50MHz  
JP19  
JP19  
JP17  
JP15  
JP17  
JP15  
1
2
3
1
2
3
JP151-2On, JP171-2On  
andJP192-3On:  
40MHz  
JP151-2On, JP172-3On  
andJP191-2On:  
50MHz  
External  
CPUClockSpeed  
Internal  
25MHz  
33MHz*  
40MHz  
50MHz  
50MHz  
25/50MHz 33/66/100MHz 40/80MHz  
CPUClockSpeed  
PentiumOverDrive  
InternalClockSpeed  
63MHz  
83MHz  
20  
G486VPB  
Jumper Settings for CPU Type Select  
Intel 486SX  
Pin 1  
21  
PCI/ISA System Board  
Intel 486DX/DX2 * (Default)  
Pin 1  
22  
G486VPB  
Intel DX4  
Pin 1  
23  
PCI/ISA System Board  
Intel DX4 OverDrive / Pentium OverDrive  
Pin 1  
24  
G486VPB  
AMD Am486DX2 SV8B  
Pin 1  
25  
PCI/ISA System Board  
AMD Am486DX2 NV8T  
Pin 1  
26  
G486VPB  
AMD Am486DX4 SV8B / Am486DX4 NV8T  
Pin 1  
27  
PCI/ISA System Board  
UMC U5SD  
Pin 1  
28  
G486VPB  
UMC U5S / U5SLV  
Pin 1  
29  
PCI/ISA System Board  
Cyrix Cx486 DX/DX2/DX4  
SGS Thompson ST486DX2  
Cyrix  
Cx486DX/DX2/DX4  
or  
SGS  
ST486DX2  
Pin1  
30  
G486VPB  
Cyrix Cx5x86  
Pin 1  
31  
PCI/ISA System Board  
Installing Upgrade CPUs  
The G486VPB is equipped with a 237-pin Zero  
Insertion Force (ZIF) socket at location U17 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 prevent improper OverDrive  
Processor installation, the ZIF socket has a Plug/Keying  
mechanism. Several holes in the socket are plugged so  
OverDrive Processors will go in only one way. If you  
cannot easily insert the OverDrive Processor, verify that  
pin 1 of the CPU is aligned with pin 1 of the socket. A  
warning note--be extremely careful to match pin 1 of the  
CPU with Pin 1 of the socket. Only Intel's OverDrive  
Processor is keyed to prevent improper placement in the  
ZIF socket. Other Intel CPUs, as well as CPUs from  
other vendors, can be placed incorrectly and will be  
permanently damaged if placed incorrectly.  
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  
32  
G486VPB  
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.  
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/heat-  
sink 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  
33  
PCI/ISA System Board  
To install an upgrade CPU in the G486VPB, 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 screwdrivers 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.  
34  
G486VPB  
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.  
4. Push the handle down until the handle locks into its  
place. The 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.  
Positioning the CPU Above the ZIF Socket  
35  
PCI/ISA System Board  
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.  
36  
G486VPB  
Memory Installation  
The G486VPB 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.  
The SIM sockets are divided into four banks on the  
system board. The G486VPB uses 256Kx36, 512Kx36,  
1Mx36, 2Mx36, 4Mx36, 8Mx36, or 16Mx36 HSIM  
modules installed in four banks. Non-parity (x32)  
SIMMs can also be used if parity checking is turned off  
in CMOS Setup.  
You will need 1 or 2 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.  
Pin1 of the SIMM socket  
Locations of SIM Sockets on the  
System Board  
37  
PCI/ISA System Board  
MemorySize Bank0/1 Bank2/3  
1MB  
2MB  
1M  
1M  
-
1M  
4MB  
4M  
-
5MB  
4M  
1M  
8MB  
4M  
4M  
16MB  
17MB  
20MB  
32MB  
64MB  
65MB  
68MB  
128MB  
2MB  
3MB  
4MB  
6MB  
10MB  
18MB  
8MB  
16M  
16M  
16M  
16M  
64M  
64M  
64M  
64M  
-
1M  
4M  
16M  
-
1M  
4M  
64M  
-
1M  
2M(D)*  
4M  
8M(D)*  
16M  
-
2M(D)*  
2M(D)*  
2M(D)*  
2M(D)*  
2M(D)*  
2M(D)*  
8M(D)*  
8M(D)*  
8M(D)*  
8M(D)*  
8M(D)*  
8M(D)*  
16M(D)*  
32M(D)*  
32M(D)*  
32M(D)*  
32M(D)*  
32M(D)*  
32M(D)*  
32M(D)*  
32M(D)*  
9MB  
1M  
4M  
12MB  
16MB  
24MB  
72MB  
32MB  
32MB  
33MB  
34MB  
36MB  
40MB  
48MB  
64MB  
96MB  
8M(D)*  
16M  
64M  
16M(D)*  
-
1M  
2M(D)*  
4M  
8M(D)*  
16M  
32M(D)*  
64M  
*(D)-DoubleDensity  
38  
G486VPB  
Note:  
If you are installing only one SIMM, you can install it in  
any of the sockets. The bank you choose is considered to  
be Bank 0/1.  
Installing the Modules  
An HSIM module simply snaps into a socket on the  
system board. Pin 1 of the HSIM module must corre-  
spond 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.  
39  
PCI/ISA System Board  
Other Jumper Settings  
Jumper Settings for Internal/External Battery, CMOS Clean, Flash  
EPROM, PS/2 Mouse, CPU Speed for PCI Slots and Parallel Port  
ECP DMA Channel Setting  
JP3  
JP8  
JP4  
JP2  
JP1  
JP22  
JP31  
JP5  
Locations of Jumpers JP1, JP2, JP3, JP4, JP5, JP22 and JP31  
on the G486VPB System Board  
40  
G486VPB  
Jumper JP3  
Internal Battery Select  
The G486VPB comes with an internal Lithium battery.  
If you wish to install an external 3.6V Lithium battery,  
set JP3 pins 1 and 2 to On.  
1
2
3
1
2
3
1-2 On:  
External Battery Enabled  
(Default)  
2-3 On:  
Internal Battery Enabled  
Note:  
If you enable the external battery, you must connect the  
external battery to connector J3 or your system will lose  
its CMOS settings when powered off.  
Jumper JP22  
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  
JP22 pins 2 and 3 to On for approximately two minutes,  
then return to the default position.  
1
2
3
1
2
3
1-2 On:  
Normal  
(Default)  
2-3 On:  
CMOSClean  
41  
PCI/ISA System Board  
Jumper JP5  
EPROM Type  
Jumper JP5 shoud be set to match the type of the  
EPROM installed on the system board. The EPROM  
type setting has been set by the manufacturer; do not  
change the setting by yourself without manufacturer  
authorization.  
1
2
3
1
2
3
1-2 On: 12V Flash  
EPROM28F010  
(Default)  
2-3 On: 5V Flash  
EPROM 29F010 or  
EPROM27C010  
Jumpers JP2 and JP31  
PS/2 Mouse  
The G486VPB package includes a card-edge bracket  
with serial and mouse port. By default, the mouse port  
is disabled. If you intend to use a PS/2 mouse, the port  
must be enabled. The PS/2 mouse port uses IRQ12, but  
when the PS/2 mouse port is disabled, IRQ12 is avail-  
able to other devices. To enable the PS/2 mouse, set  
Jumper JP2 pins 1 and 2 to On, and JP31 to Off. Make  
sure you connect the PS/2 mouse port to Connector  
CN3.  
1
2
3
1
2
3
JP2  
JP31  
JP2  
JP31  
JP22-3 On and JP31On:  
PS/2 Mouse Disabled  
(Default)  
JP21-2 On and JP31Off:  
PS/2 Mouse Enabled  
42  
G486VPB  
Jumpers JP4 and JP8  
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  
JP4 and JP8 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  
JP4 and JP8 pins 1 and 2 to On.  
1
2
3
1
2
3
1-2 On:  
CPU External Clock Speed  
<= 33MHz (Default)  
2-3 On:  
CPU External Clock  
Speed > 33MHz  
Set Jumpers JP4 and JP8 pins 2-3 to On if your  
G486VPB 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.  
43  
PCI/ISA System Board  
Jumper JP1  
ECP DMA Channel Select  
The on-board printer port can be set to ECP mode in  
CMOS Setup. In ECP mode (but not in the other printer  
port modes), the printer port requires a DMA channel.  
Set Jumper JP1 to assign either DMA Channel 1 or  
DMA Channel 3 to the ECP port. Use a DMA channel  
that does not conflict with your add-in cards. For ex-  
ample, if you have a sound card that uses DMA3, then  
assign DMA1 to the ECP port.  
1
3
2
4
1
3
2
4
1
3
2
4
5
5
5
6
6
6
1-3, 2-4 On:  
DMA 1 (Default)  
Off: No DMA  
3-5, 4-6 On:  
DMA3  
44  
G486VPB  
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  
one grounded wriststrap for electrostatic  
discharge protection  
Step 1  
Step 2  
Step 3  
Unlock your system unit. Turn off the power and dis-  
connect all power cords and cables.  
Remove the system unit cover. Refer to the manufac-  
turer’s instructions if necessary.  
Wear the grounded wriststrap, remove all expansion  
cards and detach all connectors from the old system  
board.  
Step 4  
Loosen the screws holding the original system board and  
remove the board from the system. Save the screws.  
45  
PCI/ISA System Board  
Step 5  
Remove the G486VPB 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 10 and 11 for proper handling techniques.  
Step 6  
Step 7  
Insert the HSIM modules into the SIMM banks on the  
G486VPB. The quantity and location of the SIM  
modules is dependent upon the memory configuration  
and type of modules you intend to use.  
Install the CPU. Be sure Pin 1 of the CPU is aligned  
with Pin 1 of the socket.  
Step 8  
Step 9  
Set the appropriate jumpers.  
Install the prepared G486VPB system board into the  
case and replace the screws.  
Step 10  
Reinstall all cards and connectors and replace the sys-  
tem unit cover. Reconnect all power cords and cables.  
46  
G486VPB  
Built-in Ports  
The G486VPB 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.  
Locations of the Built-in Ports  
on the System Board  
47  
PCI/ISA System Board  
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  
G486VPB 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:  
Port Configuration  
I/O Address  
COM1  
COM2  
COM3  
COM4  
3F8h  
2F8h  
3E8h  
2E8h  
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.  
48  
G486VPB  
The Primary and Secondary Serial Ports  
on the G486VPB System Board  
Parallel Port  
The G486VPB 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:  
Port Configuration  
I/O Address  
LPT1  
LPT2*  
LPT3  
3BC-3BE Hex  
378-37A Hex  
278-27A Hex  
* Default setting  
49  
PCI/ISA System Board  
Connecting the Parallel Printer Port  
Attach the DB-25S printer port cable, which came with  
the motherboard, to Connector J5 on the G486VPB  
system board. Make sure the colored stripe on the  
ribbon cable aligns with pin 1 of Connector J5. Use a  
small nutdriver to mount the cable into a DB-25 cutout  
in the system chassis.  
The Parallel Printer Port on the G486VPB System Board  
50  
G486VPB  
Floppy Disk Drive Controller  
The G486VPB 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  
floppy disk drives (2.88MB optional).  
Connecting the Floppy Disk Cable  
The Floppy Disk Connector on the  
G486VPB System Board  
Step 1  
Install the 34-pin header connector into the floppy disk  
connector (J4) on the system board. The colored edge of  
the ribbon should be aligned to pin 1 of the J4 connec-  
tor.  
51  
PCI/ISA System Board  
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 at-  
tached to the drive you want to be Drive A.  
IDE Hard Disk Interface  
The G486VPB system board is equipped with one VL-  
Bus 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 con-  
troller 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.  
52  
G486VPB  
Connecting the IDE Hard Disk Interface  
The IDE Hard Disk Connector on the  
G486VPB System Board  
Step 1  
If you are connecting two hard drives, install the 40-pin  
connector of the IDE cable into the primary disk con-  
nector (J7). If you are adding a third or fourth IDE  
device, install the 40-pin connector of the other IDE  
cable into the secondary connector (J6). 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).  
53  
PCI/ISA System Board  
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 instruc-  
tions provided by the drive manufacturer for setting the  
jumpers and/or switches on the drives. No changes are  
needed on the G486VPB 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  
G486VPB 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.  
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.  
54  
G486VPB  
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 G486VPB 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 G486VPB System Board  
55  
PCI/ISA System Board  
Installing Expansion Cards  
The G486VPB 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. The location of the  
expansion slots are shown below.  
See note  
Note:  
The system can support three bus-master PCI cards.  
Place two bus-master cards in slots PCI3 and PCI4. A  
third bus-master card can be placed in either slot PCI1  
or PCI2. The remaining slot (PCI1 or PCI2) can sup-  
port a slave card only.  
56  
G486VPB  
v InitialSetupProgram  
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 mes-  
sage 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 every time the sys-  
tem is rebooted or any time you try to enter Setup. Type  
in the correct password and press <Enter>.  
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.  
57  
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.  
58  
G486VPB  
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 G486VPB 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 num-  
ber.  
59  
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 neither drive is  
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  
errors except a keyboard error.  
All, But Diskette: The system will stop for any  
errors except a disk error.  
60  
G486VPB  
All, But Disk/Key: The system will stop for any  
errors except a keyboard or disk  
error.  
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.  
61  
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 com-  
mand 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.  
62  
G486VPB  
Chipset Features Setup  
The G486VPB uses the 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.  
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.  
63  
PCI/ISA System Board  
Power Management Setup  
Use the arrow keys to highlight “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.  
64  
G486VPB  
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 G486VPB system board supports four PCI slots.  
Each slot may be assigned INT value if the card in-  
stalled in the slot requires an interrupt. Each INT may  
then be assigned an IRQ value.  
65  
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 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 instruc-  
tion of a technical engineer, otherwise, failure may  
occur.  
66  
G486VPB  
Password Setting  
If you want to set a password, make sure that the Secu-  
rity Option under the BIOS Features Setup is set to  
“System” or “Setup”. Refer to the BIOS Features Setup  
option for more information.  
Use the arrow keys to highlight the password Setting  
option and press <Enter>. The message below will  
appear.  
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.  
Use the arrow keys to highlight the “Supervisor Pass-  
word” option and press <Enter>. The message below  
will appear.  
Enter Password:  
Type in the password. You are limited to eight charac-  
ters. 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,  
67  
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 41 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 pass-  
word, follow the procedure described in the section  
above, “Supervisor Password”. If you forget your pass-  
word, refer to the procedure described in the same  
section.  
68  
G486VPB  
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.  
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.  
69  
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:  
Reboot System (Y/N)? N  
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> simultaneously or <Del> after memory testing is  
done.  
Exit Without Saving  
If 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> simultaneously or <Del> after  
memory testing is done.  
70  
G486VPB  
v IDE Device Drivers  
The G486VPB system board uses the VT82C496G 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 G486VPB comes with IDE driver diskette(s). The  
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.  
71  
PCI/ISA System Board  
v TroubleshootingChecklist  
If you experience difficulty with the G486VPB 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 keyboard  
connector.  
72  
G486VPB  
You should replace the old battery with the type of  
lithium battery already used on your system board,  
3V lithium battery CR2032. One of the battery  
sockets presented below is supported by your  
G486VPB board.  
To remove the battery from the socket above, push  
the black button downward (1) and the battery to the  
right (2).  
3V Lithium  
Battery  
(+)  
To remove the battery from the socket, simply push  
the battery to the left. It will slide out of the socket.  
Caution:  
Battery may explode if mistreated. Do not recharge,  
disassemble or dispose of in fire.  
73  
PCI/ISA System Board  
v Appendix A:Types of Modules  
The G486VPB system board allows you to populate  
memory with 256Kx36, 512Kx36, 1Mx36, 2Mx36,  
4Mx36, 8Mx36 and 16Mx36 SIM modules. The follow-  
ing modules have been tested with this board. Most  
untested brands will work but a few may fail to do so.  
For SIM 256Kx36 Modules  
Brand  
Chip Number  
OKI  
M51C256A-70  
For SIM 512Kx36 Modules  
Brand  
Chip Number  
OKI  
M514256B-70J  
For SIM 1Mx36 Modules  
Brand  
Chip Number  
Toshiba  
OKI  
Fujitsu  
TC511000AJL  
GT-1M*36B  
81C1000A-70  
74  
G486VPB  
For SIM 2Mx36 Modules  
Brand  
Chip Number  
OKI  
M511000B  
For SIM 4Mx36 Modules  
Brand  
Chip Number  
OKI  
M514100A-70S  
For SIM 8Mx36 Modules  
Brand  
Chip Number  
OKI  
M514100AL-70K  
75  
PCI/ISA System Board  
v Appendix B: System Error Report  
When the BIOS encounters an error that requires the  
user to correct something, either a beep code will sound  
or a message will be displayed in a box in the middle of  
the screen and a message PRESS F1 TO CONTINUE,  
CTRL-ALT-ESC or DEL TO ENTER SETUP will be  
shown in the information box at the bottom.  
POST Beep  
There is one beep code in BIOS. This code indicates  
that a video error has occurred and the BIOS cannot  
initialize the video screen to display any additional  
information. This beep code consists of a single long  
beep followed by two short beeps.  
Error Messages  
One or more of the following messages may be dis-  
played if the BIOS detects an error during the POST.  
CMOS BATTERY HAS FAILED  
CMOS battery is no longer functional. It should be  
replaced. The replacement battery is a 3V lithium  
CR2032. Replacing the battery will clear the CMOS.  
Refer to the Jumper JP22 section of this manual, page  
41, to reset the CMOS. Location of the battery and  
replacement procedure are given on pages 73 and 74 of  
the manual.  
76  
G486VPB  
CMOS CHECKSUM ERROR  
Checksum of CMOS is incorrect. This can indicate that  
CMOS has become corrupt. This error may have been  
caused by a weak battery. Check the battery and replace  
if necessary.  
DISK BOOT FAILURE, INSERT SYSTEM DISK AND PRESS  
ENTER  
No boot device was found. Insert a system disk into  
Drive A and press <Enter>. Assuming the system is  
booted from the hard drive, make sure the controller is  
inserted correctly and all cables are properly attached.  
Also, be sure the disk is formatted as a boot device;  
then reboot the system.  
DISKETTE DRIVES OR TYPES MISMATCH ERROR - RUN  
SETUP  
Type of diskette drive installed in the system is different  
from the CMOS definition. Run setup to reconfigure the  
drive type correctly.  
DISPLAY SWITCH IS SET INCORRECTLY  
Display switch on the motherboard can be set to either  
monochrome or color. This indicates the switch is set to  
a different setting than indicated in Setup. Determine  
which setting is correct, and then either turn off the  
system and change the jumper, or enter Setup and  
change the VIDEO selection.  
DISPLAY TYPE HAS CHANGED SINCE LAST BOOT  
Since last powering off the system, the display adapter  
has been changed. You must configure the system for  
the new display type.  
77  
PCI/ISA System Board  
ERROR ENCOUNTERED INITIALIZING HARD DRIVE  
Hard drive cannot be initialized. Be sure the adapter is  
installed correctly and all cables are correctly and firmly  
attached. Also, be sure the correct hard drive type is  
selected in Setup (refer to Appendix G).  
ERROR INITIALIZING HARD DISK CONTROLLER  
Cannot initialize controller. Make sure the card is  
correctly and firmly installed in the bus. Be sure the  
correct hard drive type is selected in Setup. Also, check  
to see if any jumper needs to be set correctly on the  
hard drive.  
FLOPPY DISK CNTRLR ERROR OR NO CNTRLR  
PRESENT  
Cannot find or initialize the floppy drive controller.  
Make sure the controller is installed correctly and  
firmly. If there are no floppy drives installed, be sure the  
Diskette Drive selection in Setup is set to NONE.  
KEYBOARD ERROR OR NO KEYBOARD PRESENT  
Cannot initialize the keyboard. Make sure the keyboard  
is attached correctly and no keys are being pressed  
during the boot.  
If you are purposely configuring the system without a  
keyboard, set the error halt condition in Setup to HALT  
ON ALL, BUT KEYBOARD. This will cause the BIOS  
to ignore the missing keyboard and continue the boot.  
MEMORY ADDRESS ERROR AT...  
Indicates a memory address error at a specific location.  
You can use this location along with the memory map  
for your system to find and replace the bad memory  
chips.  
78  
G486VPB  
MEMORY PARITY ERROR AT...  
Indicates a memory parity error at a specific location.  
You can use this location along with the memory map  
for your system to find and replace the bad memory  
chips.  
MEMORY SIZE HAS CHANGED SINCE LAST BOOT  
Memory has been added or removed since the last boot.  
Enter Setup and enter the new memory size in the  
memory fields.  
MEMORY VERIFY ERROR AT...  
Indicates an error verifying a value already written to  
memory. Use the location along with your system’s  
memory map to locate the bad chip.  
OFFENDING ADDRESS NOT FOUND  
This message is used in conjunction with the I/O  
CHANNEL CHECK and RAM PARITY ERROR  
messages when the segment that has caused the problem  
cannot be isolated.  
OFFENDING SEGMENT  
This message is used in conjunction with the I/O  
CHANNEL CHECK and RAM PARITY ERROR  
messages when the segment that has caused the problem  
has been isolated.  
PRESS A KEY TO REBOOT  
This will be displayed at the bottom screen when an  
error occurs that requires a reboot. Press any key and the  
system will reboot.  
79  
PCI/ISA System Board  
PRESS F1 TO DISABLE NMI, F2 TO REBOOT  
When BIOS detects a Non-Maskable Interrupt condition  
during boot, this will allow NMI to be disabled and  
continue to boot. You can also reboot the system with  
the NMI enabled.  
RAM PARITY ERROR - CHECKING FOR SEGMENT  
Indicates a parity error in Random Access Memory.  
SYSTEM HALTED, (CTRL-ALT-DEL) TO REBOOT...  
Indicates the present boot attempt has been aborted and  
the system must be rebooted. Press and hold down the  
CTRL and ALT keys and press DEL simultaneously.  
80  
G486VPB  
v Appendix C: Memory & I/O Maps  
Memory Address Map  
Address  
Name  
Function  
0000000 to  
009FFFF  
640K System  
Board RAM  
System Board Memory  
00A0000 to  
00BFFFF  
128K Video  
Display Memory  
Reserved for Graphics Display  
Memory  
00C0000 to  
00E7FFF  
160K I/O  
Expansion ROM  
Reserved for ROM on I/O  
Adapter Card  
00E8000 to  
00FFFFF  
96K ROM on  
the System Board  
System Board BIOS  
0100000 to  
3FFFFFF  
Maximum  
Memory 128M  
System Board Memory  
81  
PCI/ISA System Board  
I/O Address Map  
I/O Address  
Function  
000-01F  
020-03F  
040-05F  
060-06F  
070-07F  
DMA Controller 1, 8237A-5  
Interrupt Controller 1, 8259A, Master  
Timer, 8254-2  
8742 (Keyboard Controller)  
Real-time Clock, NMI  
(Non-maskable Interrupt) Mask  
DMA Page Memory, 74LS612  
Interrupt Controller 2, 8259A  
DMA Controller 2, 8237A-5  
Shadow RAM and Cache Control Bit  
Clear Numeric Processor  
Extension Busy  
Reset Numeric Processor Extension  
Numeric Processor Extension  
Fixed Disk  
Game I/O  
Parallel Printer Port 2  
Serial Port 2  
Prototype Card  
Reserved  
Parallel Printer Port 1  
SDLC, Bisynchronous 2  
Bisynchronous 1  
Monochrome Display and Printer Adapter  
Reserved  
Color/Graphics Monitor Adapter  
Diskette Controller  
Serial Port 1  
080-09F  
0A0-08F  
0C0-0DF  
0E8  
0F0  
0F1  
0F8-OFF  
1F0-1F8  
200-207  
278-27F  
2F8-2FF  
300-31F  
360-36F  
378-37F  
380-38F  
3A0-3AF  
3B0-3BF  
3C0-3CF  
3D0-3DF  
3F0-3F7  
3F8-3FF  
Note:  
The I/O address hex 000 to 0FF are reserved for the  
system board I/0. Hex 100 to 3FF are available on the  
I/O channels.  
82  
G486VPB  
v Appendix D: PCI I/O Pin Assignments  
B
A
Component Side  
Solder Side  
-12V  
- 01 -  
- 02 -  
- 03 -  
- 04 -  
- 05 -  
- 06 -  
- 07 -  
- 08 -  
- 09 -  
- 10 -  
- 11 -  
- 12 -  
- 13 -  
- 14 -  
- 15 -  
- 16 -  
- 17 -  
- 18 -  
- 19 -  
- 20 -  
- 21 -  
- 22 -  
- 23 -  
- 24 -  
- 25 -  
- 26 -  
- 27 -  
- 28 -  
- 29 -  
- 30 -  
- 31 -  
- 32 -  
- 33 -  
- 34 -  
- 35 -  
- 36 -  
- 37 -  
- 38 -  
- 39 -  
- 40 -  
- 41 -  
- 42 -  
- 43 -  
- 44 -  
- 45 -  
- 46 -  
- 47 -  
- 48 -  
- 49 -  
TRST#  
TCK  
+12V  
Ground  
TDO  
TMS  
TDI  
+5V  
+5V  
+5V  
INTA#  
INTC#  
+5V  
INTB#  
INTD#  
PRSNT1#  
Reserved  
PRSNT2#  
Ground  
Ground  
Reserved  
Ground  
CLK  
Reserved  
+5V (I/O)  
Reserved  
Ground  
Ground  
Reserved  
RST#  
+5V (I/O)  
GNT#  
Ground  
Reserved  
AD[30]  
+3.3V  
AD[28]  
AD[26]  
Ground  
AD[24]  
IDSEL  
+3.3V  
AD[22]  
AD[20]  
Ground  
AD[18]  
AD[16]  
+3.3V  
Ground  
REQ#  
+5V (I/O)  
AD[31]  
AD[29]  
Ground  
AD[27]  
AD[25]  
+3.3V  
C/BE[3]#  
AD[23]  
Ground  
AD[21]  
AD[19]  
+3.3V  
AD[17]  
C/BE[2]#  
Ground  
IRDY#  
FRAME#  
Ground  
TRDY#  
Ground  
STOP#  
+3.3V  
+3.3V  
DEVSEL#  
Ground  
LOCK#  
PERR#  
+3.3V  
SDONE  
SBO#  
SERR#  
+3.3V  
Ground  
PAR  
C/BE[1]#  
AD[14]  
Ground  
AD[12]  
AD[10]  
Ground  
AD[15]  
+3.3V  
AD[13]  
AD[11]  
Ground  
AD[09]  
AD[08]  
AD[07]  
+3.3V  
- 52 -  
- 53 -  
- 54 -  
- 55 -  
- 56 -  
- 57 -  
- 58 -  
- 59 -  
- 60 -  
- 61 -  
- 62 -  
C/BE[0]#  
+3.3V  
AD[06]  
AD[04]  
Ground  
AD[02]  
AD[00]  
+5V (I/O)  
REQ64#  
+5V  
AD[05]  
AD[03]  
Ground  
AD[01]  
+5V (I/O)  
ACK64#  
+5V  
+5V  
+5V  
83  
PCI/ISA System Board  
v Appendix E: ISA I/O Pin Assignments  
B
A
Gnd  
ResetDrv  
+5VDC  
IRQ9  
- 01 -  
- 02 -  
- 03 -  
- 04 -  
- 05 -  
- 06 -  
- 07 -  
- 08 -  
- 09 -  
- 10 -  
- 11 -  
- 12 -  
- 13 -  
- 14 -  
- 15 -  
- 16 -  
- 17 -  
- 18 -  
- 19 -  
- 20 -  
- 21 -  
- 22 -  
- 23 -  
- 24 -  
- 25 -  
- 26 -  
- 27 -  
- 28 -  
- 29 -  
- 30 -  
- 31 -  
-I/OChck  
SD7  
SD6  
SD5  
-5VDC  
DRQ2  
-12VDC  
OWS  
SD4  
SD3  
SD2  
SD1  
+12VDC  
Gnd  
SD0  
-I/OChrdy  
AEN  
SA19  
SA18  
SA17  
SA16  
SA15  
SA14  
SA13  
SA12  
SA11  
SA10  
SA9  
-SEMEMW  
-SEMEMR  
-IOW  
-IOR  
-Dack3  
-DRQ3  
-Dack1  
DRQ1  
-Refresh  
CLK  
IRQ7  
IRQ6  
IRQ5  
SA8  
IRQ4  
SA7  
IRQ3  
SA6  
-Dack2  
T/C  
SA5  
SA4  
Bale  
SA3  
+5VDC  
OSC  
SA2  
SA1  
Gnd  
SA0  
D
C
- 01 -  
- 02 -  
- 03 -  
- 04 -  
- 05 -  
- 06 -  
- 07 -  
- 08 -  
- 09 -  
- 10 -  
- 11 -  
- 12 -  
- 13 -  
- 14 -  
- 15 -  
- 16 -  
- 17 -  
- 18 -  
-MemCS16  
-I/OCS16  
IRQ10  
IRQ11  
IRQ12  
IRQ13  
IRQ14  
-Dack0  
DRQ0  
SBHE  
LA23  
LA22  
LA21  
LA20  
LA19  
LA18  
LA17  
-Memr  
-Memw  
SD08  
SD09  
SD10  
SD11  
SD12  
SD13  
SD14  
SD15  
-Dack5  
DRQ5  
-Dack6  
DRQ6  
-Dack7  
DRQ7  
+5VDC  
-Master  
Gnd  
84  
G486VPB  
v Appendix F: Connector Pin Assignments  
J8  
IDE2LED  
J9  
IDE1LED  
J10  
Keylock  
J11  
Speaker  
J12  
Reset  
J13  
TurboSW.  
J14  
TurboLED  
J15  
GreenLED  
Locations of Connectors on the System Board  
85  
PCI/ISA System Board  
Connectors J1 and J2  
Primary (COM1) and Secondary (COM2) Serial Ports  
Pin  
Function  
1
2
3
4
5
6
7
8
9
DCD (Data Carrier Detect)  
RX (Receive Data)  
TX (Transmit Data)  
DTR (Data Terminal Ready)  
Ground (Signal Ground)  
DSR (Data Set Ready)  
RTS (Request to Send)  
CTS (Clear to Send)  
RI (Ring Indicator)  
Connector J5  
Parallel Printer Port  
Function  
Pin  
-Strobe  
Data 0  
Data 1  
Data 2  
Data 3  
Data 4  
Data 5  
Data 6  
Data 7  
1
2
3
4
5
6
7
8
9
86  
G486VPB  
Pin  
Function  
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
25  
-Ack  
Busy  
Paper Empty  
Select  
-Autofd  
-Error  
-Init  
-Slctin  
Ground  
Ground  
Ground  
Ground  
Ground  
Ground  
PNF  
Ground  
Connector J4  
Floppy Disk Drive Connector  
Function  
Pin  
Ground  
DENSEL  
Ground  
Reserved  
Ground  
Drate0  
1
2
3
4
5
6
7
8
Ground  
Index  
87  
PCI/ISA System Board  
Pin  
Function  
9
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
25  
26  
27  
28  
29  
30  
31  
32  
33  
34  
Ground  
MTR0  
Ground  
DR1  
Ground  
DR0  
Ground  
MTR1  
Drate1  
Dir  
Ground  
Step  
Ground  
Write Data  
Ground  
Write Gate  
Ground  
Track 0  
MSEN  
Wr Protect  
Ground  
Read Data  
Ground  
Head Select  
Ground  
Disk Change  
88  
G486VPB  
Connectors JP6 and JP7  
Primary and Secondary IDE Hard Disk Drive Connectors  
Pin  
Function  
1
2
-Reset  
Ground  
D7  
3
4
D8  
5
D6  
6
D9  
7
D5  
8
D10  
9
D4  
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
25  
D11  
D3  
D12  
D2  
D13  
D1  
D14  
D0  
D15  
Ground  
Reserved  
Reserved  
Ground  
-IOW  
Ground  
-IOR  
89  
PCI/ISA System Board  
Function  
Pin  
Ground  
IO Channel Ready *  
BALE  
26  
27  
28  
29  
30  
31  
32  
33  
34  
35  
36  
37  
38  
39  
40  
Reserved  
Ground  
IRQ14  
IOCS16  
SA1  
Reserved  
SA0  
SA2  
HCS0  
HCS1  
LED  
Ground  
* Pin 27 is Reserved for Secondary IDE Channel  
Connectors J8 and J9  
IDE1/IDE2 LED  
Pin  
Function  
1
2
Signal  
LED Power  
90  
G486VPB  
Connector J10  
Keylock Connector  
Pin  
Function  
1
2
3
4
5
LED Signal  
Reserved  
Ground  
Keylock Signal  
Ground  
Connector J11  
Speaker Connector  
Pin  
Function  
1
2
3
4
Signal  
Reserved  
Ground  
+5V  
Connector JP12  
Reset Switch Connector  
Pin  
Function  
1
2
Ground  
Reset  
91  
PCI/ISA System Board  
Connector J13  
Turbo/Green Button Connector  
Pin  
Function  
1
2
GND  
Signal  
Connector J14  
Turbo LED Connector  
Pin  
Function  
1
2
Signal  
LED Power  
Connector J15  
Green LED Connector  
Pin  
Function  
1
2
Signal  
LED Power  
92  
G486VPB  
Connector J3  
External Battery Connector  
Function  
Pin  
3.6 Lithium Battery  
1
2
3
4
Key  
GND  
GND  
Connector CN2  
Keyboard Connector  
Pin  
Function  
1
2
3
4
5
Keyboard Clock  
Keyboard Data  
Not Connected  
Ground  
+5V  
Connector CN3  
PS/2 Mouse Connector  
Pin  
Function  
1
2
3
4
5
6
Mouse Data  
Reserved  
Ground  
+5V  
Mouse Clock  
Reserved  
93  
PCI/ISA System Board  
Connector PL1  
Power Connector  
Pin  
Function  
1
2
Power Good  
+5V  
3
+12V  
4
-12V  
5
Ground  
Ground  
Ground  
Ground  
-5V  
6
7
8
9
10  
11  
12  
+5V  
+5V  
+5V  
94  
G486VPB  
v AppendixG:AwardBIOSHardDiskTable  
Example  
Model  
Type Size Cylinders Heads Sectors Write  
Land  
(MB)  
Precomp Zone  
306  
615  
4
4
17  
17  
128  
300  
305  
615  
10  
TEAC SD510,  
MMI 112, 5412  
Seagate ST225,  
ST4026  
1
2
20  
30  
62  
46  
20  
615  
940  
940  
615  
6
8
6
4
17  
17  
17  
17  
300  
512  
615  
940  
940  
615  
3
4
5
6
512  
None  
Seagate ST125,  
Tandon TM262  
462  
733  
900  
820  
855  
855  
306  
8
5
17  
17  
17  
17  
17  
17  
17  
256  
None  
None  
None  
None  
None  
128  
511  
733  
901  
820  
855  
855  
319  
30  
30  
7
8
9
10  
11  
12  
13  
Tandon TM 703  
112  
20  
15  
3
35  
5
49  
7
8
20  
Disctron 526,  
MMI M125  
42  
20  
733  
612  
7
4
17  
(Reserved)  
17  
None  
0
733  
663  
14  
15  
16  
Microscience HH725,  
Syquest 3250, 3425  
977  
977  
5
7
17  
17  
17  
17  
17  
17  
17  
17  
17  
17  
17  
300  
None  
512  
977  
977  
40  
56  
59  
30  
42  
30  
10  
40  
76  
71  
111  
17  
18  
19  
20  
21  
22  
23  
24  
25  
26  
27  
1024  
733  
7
1023  
732  
5
300  
733  
7
300  
732  
306  
5
300  
733  
Seagate ST4038  
977  
4
0
336  
1024  
1224  
1224  
1224  
5
None  
None  
None  
None  
976  
Seagate ST4051  
Seagate ST4096  
Maxtor 2085  
Maxtor 2140,  
Priam S14  
Maxtor 2190,  
Priam S19  
9
1023  
1223  
1223  
7
11  
1024  
15  
17  
None  
1223  
152  
28  
95  
PCI/ISA System Board  
Example  
Model  
Type Size Cylinders Heads Sectors Write  
Land  
(MB)  
Precomp Zone  
68  
1024  
918  
8
17  
17  
None  
None  
1023  
1023  
29  
30  
Maxtor 1085,  
Micropolis 1325  
Maxtor 1105 1120,  
4780  
93  
11  
83  
69  
85  
102  
110  
119  
17  
925  
1024  
1024  
1024  
1024  
1024  
1024  
1024  
918  
11  
9
10  
12  
13  
14  
2
17  
17  
17  
17  
17  
17  
17  
17  
17  
17  
17  
None  
None  
None  
None  
None  
None  
None  
None  
None  
None  
None  
1023  
926  
31  
32  
33  
34  
35  
36  
37  
38  
39  
40  
41  
Maxtor 1170  
CDC 9415  
1023  
1023  
1023  
1023  
1023  
1023  
1023  
820  
136  
114  
40  
16  
15  
6
Maxtor 1140, 4380  
Seagate ST251  
Seagate 4053  
820  
1024  
42  
5
1023  
Miniscribe 3053/6053  
Miniscribe 3053/6053  
RLL  
Miniscribe 3650  
Miniscribe 3675 RLL  
Conner CP3104  
Conner CP3204  
65  
1024  
5
26  
None  
1023  
42  
40  
61  
809  
809  
776  
684  
6
6
8
16  
17  
26  
33  
38  
None  
None  
None  
None  
852  
852  
775  
685  
43  
44  
45  
46  
100  
203  
User Defined  
96  

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