Page 1
GA - 686KX
USER'S MANUAL
Pentium II Processor MAINBOARD
REV. 1 Second Edition
Page 2
GA-686KX
The author assumes no responsibility for any errors or omissions which may
appear in this document nor does it make a commitment to update the
information contained herein.
Third-party brands and names are the property of their respective
owners.
APRIL 26, 1997 Taipei, Taiwan
TABLE OF CONTENTS
1. INTRODUCTION...........................................................................................1-
2
Page 3
Table of Contents
1.1. PREFACE...............................................................................................1-
1.2. KEY FEATURES.....................................................................................1-
1.3. PERFORMANCE LIST............................................................................1-
1.4. BLOCK DIAGRAM..................................................................................1-
1.5. INTRODUCE THE Pentium II Processor.............................................1-
2. SPECIFICATION..........................................................................................2-
2.1. HARDWARE...........................................................................................2-
2.2. SOFTWARE............................................................................................2-
2.3. ENVIRONMENT......................................................................................2-
3. HARDWARE INSTALLATION.....................................................................3-
3.1. UNPACKING...........................................................................................3-
3.2. MAINBOARD LAYOUT...........................................................................3-
3.3. QUICK REFERENCE FOR JUMPERS & CONNECTORS....................3-
3.4. DRAM INSTALLATION...........................................................................3-
3.5. CPU SPEED SETUP..............................................................................3-
3.6. CMOS RTC & ISA CFG CMOS SRAM..................................................3-
3.7. SPEAKER CONNECTOR INSTALLATION............................................3-
3.8. HARDWARE RESET SWITCH CONNECTOR INSTALLATION...........3-
3.9. POWER LED CONNECTOR INSTALLATION.......................................3-
3.10. GREEN LED INSTALLATION...............................................................3-
3.11. IDE & ATAPI DEVICE INSTALLATION................................................3-
3.12. PERIPHERAL DEVICE INSTALLATION..............................................3-
3.13. KEYBOARD & PS/2 MOUSE INSTALLATION....................................3-
3.14. KEYBOARD SETTING FUNCTION......................................................3-
4. BIOS CONFIGURATION..............................................................................4-
4.1. ENTERING SETUP.................................................................................4-
4.2. CONTROL KEYS....................................................................................4-
4.3. GETTING HELP......................................................................................4-
4.3.1. Main Menu...................................................................................4-
3
Page 4
GA-686KX
4.3.2. Status Page Setup Menu / Option Page Setup Menu.................4-
4.4. THE MAIN MENU...................................................................................4-
4.5. STANDARD CMOS SETUP MENU........................................................4-
4.6. BIOS FEATURES SETUP......................................................................4-
4.7. CHIPSET FEATURES SETUP...............................................................4-
4.8. POWER MANAGEMENT SETUP..........................................................4-
4.9. PNP/PCI CONFIGURATION..................................................................4-
4.10. INTEGRATED PERIPHERALS............................................................4-
4.11. LOAD SETUP DEFAULTS...................................................................4-
4.12. USER PASSWORD..............................................................................4-
4.13. IDE HDD AUTO DETECTION..............................................................4-
4.14. HDD LOW LEVEL FORMAT.................................................................4-
4.15. SAVE & EXIT SETUP...........................................................................4-
4.16. EXIT WITHOUT SAVING......................................................................4-
5. AT TECHNICAL INFORMATION.................................................................5-
5.1. I/O BUS CONNECTOR PIN OUT...........................................................5-
5.1.1. ISA SLOT PIN OUT.....................................................................5-
5.1.2. PCI - BUS SLOT PIN OUT..........................................................5-
5.2. I/O & MEMORY MAP..............................................................................5-
5.3. TIMER & DMA CHANNELS MAP...........................................................5-
5.4. INTERRUPT MAP...................................................................................5-
5.5. RTC & CMOS RAM MAP........................................................................5-
APPENDIX A: POST MESSAGE....................................................................A-
APPENDIX B: POST CODES.........................................................................B-
APPENDIX C: BIOS DEFAULT DRIVE TABLE.............................................C-
APPENDIX D: PROBLEM SHEET..................................................................D-
APPENDIX E: FCC DOCUMENT..................................................................E-1
4
Page 5
Introduction
1. INTRODUCTION
1.1. PREFACE
Welcome to use the GA-686KX motherboard. The motherboard is a
Pentium II Processor based PC/AT compatible system with ISA bus and
PCI Local Bus, and has been designed to be the fastest PC / AT system.
There are some new features allow you to operate the system with just the
performance you want.
This manual also explains how to install the motherboard for operation, and
how to set up your CMOS CONFIGURATION with BIOS SETUP program.
1.2. KEY FEATURES
q Intel Pentium
II Processor based PC / AT compatible mainboard.
q Slot 1 on board supports Pentium
II processor running at 233-333 MHz.
q Support CPU FAN Failure & Overheat Alarm.
q Support automatically slow down CPU speed when CPU FAN Failure or
Overheat.
q Intel 440FX chipset.
q Supports 8 - 768 MB DRAM memory on board.
q 5 Master / Slave PCI Bus slots, 3 ISA Bus slots.
q Supports 2 channels Enhance PCI IDE ports for 4 IDE Device.
q Supports 2xCOM (16550), 1xLPT (EPP / ECP), 1x1.44MB Floppy port.
q Supports 2xUSB ports.
q Supports Green function, Plug & Play function.
q Licensed AWARD BIOS, FLASH EEPROM for BIOS update.
q ATX form factor, 4 layers PCB.
1-1
Page 6
GA-686KX
1.3. PERFORMANCE LIST
The following performance data list is the testing results of some popular
benchmark testing programs.
These data are just referred by users, and there is no
responsibility for different testing data values gotten by
users. (The different Hardware & Software configuration
will result in different benchmark testing results.)
· CPU
Pentium II processor
· DRAM
32 MB EDO
· CACHE SIZE
512 KB included in CPU
· DISPLAY
Matrox Millennium 2MB
· STORAGE
Onboard IDE port + Quantum FB 1280AT IDE Drive
· O.S.
Windows95 with Display Driver at 1024 x 768 x 256
colors x 70Hz & BusMaster IDE Driver.
Processor
Intel Pentium II
233 MHz 266MHz 300MHz
Winbench97
CPU mark32
610 695 781
Winstone
Business
Hi-End
50.4
23.7
53.1
25.5
55.4
26.9
Intel Media
Benchmark 1.0
339.96 381.63 427.76
1-2
Page 7
Introduction
1.4. BLOCK DIAGRAM
Pentium II Processor
R
3.3V
Main
Memory
(DRAM)
Control
Address
Data
Host Bus
Second Level
Cache
PMC
Addr
Cntl
PCI Bus
Control
Address/Data
PCI
Device(s)
ISA
Device(s)
PIIX3CD ROM
Hard Disk
Fast IDE
ISA Bus
I/O
Device(s)
Cntl
Data
DBX
1-3
Page 8
GA-686KX
1.5. INTRODUCE THE Pentium II Processor
Figure 1:Retention Mechanism & attach Mount
Figure 2:OEM Pentium II Processor
1-4
Page 9
Introduction
Figure 3:Heatsink / FAN & Heat sink support for OEM Pentium II Processor
Figure 4:Boxed Pentium II Processor & Heat sink support
1-5
Page 10
GA-686KX
2. SPECIFICATION
2.1. HARDWARE
· CPU
- Pentium
II processor 233 - 333 MHz.
- 242 pins slot1 on board.
· PROTECTION
- Onboard Buzzer Alarm when detect "CPU FAN
Failure".
- Onboard Buzzer Alarm when detect "CPU
Overheat".
- Automatically slow down CPU speed when "CPU
FAN Failure" or "CPU Overheat".
· COPROCESSOR
- Included in Pentium
processor.
· SPEED
- 66 MHz system speed.
- 33 PCI-Bus speed.
- 8 MHz AT bus speed.
· DRAM MEMORY
- 3 banks 72 pins SIMM module socket on board.
- Use 4 / 8 / 16 / 32 / 64 /128 MB 60~70 ns SIMM
module DRAM.
- 8 ~ 768 MB DRAM size.
- Support Fast Page / EDO DRAM access mode.
· CACHE MEMORY
- 32 KB 1st cache memory included in CPU.
- 256KB/512 KB 2nd cache in CPU.
- Support Write Back cache mode for L1/L2 Cache.
· I/O BUS SLOTS
- 5 Master / Slave PCI-BUS.
- 3 16 bits ISA BUS.
· IDE PORTS
- 2 Enhanced IDE channels on board.(Using
IRQ14,15)
- Support Mode 3,4 IDE & ATAPI CD - ROM.
· I/O PORTS
- Supports 2 16550 COM ports. (Using IRQ4, 3)
- Supports 1 EPP/ECP LPT port. (Using IRQ7 or 5
and DMA3 or 1)
- Supports 1 1.44/2.88 MB Floppy port. (Using DMA2
2-1
Page 11
Specification
& IRQ6)
- Supports 2 USB ports.
- Supports PS/2 Mouse. (Using IRQ12 )
- Supports PS/2 Keyboard. (Using IRQ1 )
· GREEN FUNCTION
- Standby & Suspend mode support.
- Green switch & LED support.
- IDE & Display power down support.
- Monitor all IRQ / DMA / Display / I/O events.
· BIOS
- 128KB FLASH EEPROM.
- Supports Plug & Play Function.
· DIMENSION
- ATX Form Factor, 4 layers PCB.
2.2. SOFTWARE
· BIOS
- Licensed AWARD BIOS.
- AT CMOS Setup, BIOS / Chipset Setup, Green
Setup, Hard Disk Utility included.
· O.S.
- Operation with MS-DOS
, Windows95,
WINDOWS NT, OS/2, NOVELL and SCO UNIX.
2.3. ENVIRONMENT
· Ambient Temp.
- 0C to +50C (Operating).
· Relative Hum.
- 0 to +85% (Operating).
· Altitude
- 0 to 10,000 feet (Operating).
· Vibration
- 0 to 1,000 Hz.
· Electricity
- 4.9 V to 5.2 V.
- Max. 20A current at 5V.
2-2
Page 12
GA-686KX
3. HARDWARE INSTALLATION
3.1. UNPACKING
The mainboard package should contain the following:
· The GA-686KX mainboard.
· The Retention Mechanism & Attach Mount
· USER'S MANUAL for mainboard.
· Cable set for IDE & Floppy device.
· Diskette for BUS MASTER ATAPI device.
The mainboard contains sensitive electric components which can be easily
damaged by static electricity, so the mainboard should be left in its original
packing until it is installed.
Unpacking and installation should be done on a grounded anti-static mat. The
operator should be wearing an anti static wristband, grounded at the same
point as the anti-static mat.
Inspect the mainboard carton for obvious damage. Shipping and handling
may cause damage to your board. Be sure there are no shipping and
handling damages on the board before proceeding.
After opening the mainboard carton, extract the system board and place it
only on a grounded anti-static surface component side up. Again inspect the
board for damage. Press down on all of the socket IC's to make sure that
they are properly seated. Do this only on with the board placed on a firm flat
surface.
MDO NOT APPLY POWER TO THE BOARD IF IT HAS BEEN DAMAGED.
You are now ready to install your mainboard. The mounting hole pattern on
the mainboard matches the ATX system board. It is assumed that the chassis
is designed for a standard ATX mainboard mounting.
Place the chassis on the anti-static mat and remove the cover. Take the clips,
stand-off and screws for mounting the system board, and keep them
3-1
Page 13
Hardware Installation
separate.
3.2. MAINBOARD LAYOUT
S1
1 23 4
ON
OFF
DIP SWITC H
PCI4 PCI3 PCI2
FLOPPYCN7
CN6
CN8
GA-686KX
IDE2
IDE1
SLOT6 SLOT4SLOT8
1 72
LPT
K.B.
Mouse
CN1
J3 J 4 J5 J 6 J7 J 8 J10
1 1 1 1
+ + +
1
J9
COMBCOMA CN3
CN5
CN4
PCI1PCI5
POWER1
BIOS
K.B. controller
J1
1
SIMM 6
SIMM 1
POWER2
USB
CN2
J2
SLOT1
Bank 1
Bank 2
Bank 0
2
3
Figure 3.1
3.3. QUICK REFERENCE FOR JUMPERS & CONNECTORS
t CN1-8 I/O Ports Connector
CN1 For Serial port1(COM A).
CN2 For LPT port.
CN3 For Serial port2 (COM B).
CN4 For Keyboard I/O port.
CN4 For PS/2 Mouse port.
CN5 USB port.
CN6 For Secondary IDE port.
CN7 For Primary IDE port.
3-2
Page 14
GA-686KX
CN8 For Floppy port
t J1: CPU cooling FAN Power Connector
Pin No. Function
1 GND.
2 +12V
3 SENSE
t J2: slot1
For Pentium II processor installed.
t J3: SPEAKER Connector
Pin No. Function
1 VCC
2 NC.
3 NC.
4 Output
t J4: RESET Switch
Pin No. Function
1 RESET Input
2 GND
t J5: POWER ON LED (PW-LED)
Pin No. Function
1 LED POWER (+)
2 NC
3 GND (-)
t J6: Hard Disk active LED (HD-LED)
Pin No. Function
1 LED POWER (+)
2 LED POWER (-)
3 NC
4 LED POWER (+)
t J7: INFRARED Connector (IR) -- Function Option
Pin No. Function
1 IR Data Output
2 GND
3 IR Data Input
4 NC
5 POWER (+)
3-3
Page 15
Hardware Installation
t J8: Reserved
t J9: ATX Power On/Off
Pin No. Function
Close &
Open
This is the soft switch (Power On/Off) of ATX Power Supply,
Close & Open one time to Power On & again to Power Off.
t J10: GN-LED
Pin No. Function
1 LED anode (+).
2 LED cathode (-).
t S1: CPU INT. / EXT. FREQ. RATIO
CPU TYPE 1 2 3 4 CLK RATIO
200MHz OFF ON OFF OFF X3
233MHz ON ON OFF OFF X3.5
266MHz OFF OFF ON OFF X4
300MHz ON OFF ON OFF X4.5
333MHz OFF ON ON OFF X5
366MHz ON ON ON OFF X5.5
t Power1: PS/2 POWER connector
Pin No. Function
1 Power Good signal
2,10,11,12 VCC (+5V)
3 +12V
4 -12V
5,6,7,8 GND
9 -5V
t Power2: ATX POWER connector
Pin No. Function
3,5,7,13,15-17GND
4,6,19,20 VCC (+5V)
10 +12V
12 -12V
18 -5V
8 Power Good
9 5V SB (Stand by +5V)
14 PS-ON (Soft ON/OFF)
3.4. DRAM INSTALLATION
The mainboard can be installed with 4 / 8 / 16 / 32 / 64 / 128 MB 72 pins
3-4
Page 16
GA-686KX
SIMM module DRAM, and the DRAM speed must be 60 or 70 ns. The DRAM
memory system on mainboard consists of bank 0, 1 & bank 2. Each bank
consist of 2 PCs 72 pins SIMM module DRAM. Because the 72 pins SIMM
module is 32 bits width, using 2 PCs which can match a 64 bits system. The
total memory size is 8 - 768 MB.
The DRAM installation position refer to Figure 3.1, and notice the Pin 1 of
SIMM module must match with the Pin 1 of SIMM socket when the DRAM
SIMM module is installed. Insert the DRAM SIMM module into the SIMM
socket at 45 degree angle. If there is a wrong direction of Pin 1, the DRAM
SIMM module couldn't be inserted into socket completely.
After completely insert SIMM module into socket, then press the SIMM
module in vertical direction until the left and right metal holders can keep the
SIMM module standing up con-firmly.
3.5. CPU SPEED SETUP
The system's speed is fixed to 66.6MHz. The user can change the DIP
SWITCH (S1) selection to set up the CPU speed for 233 -
366MHz processor. The CPU speed must match with the
frequency RATIO. It will cause system hanging up if the
frequency RATIO is higher than CPU's.
DIP SWITCH (S1)
FREQ. EXT.CLK. INT.CLK.
CPU Type
1 2 3 4 RATIO MHz MHz
OFF ON OFF OFF 3 66 200
Pentium
II 200 MHz
ON ON OFF OFF 3.5 66 233
Pentium
II 233 MHz
OFF OFF ON OFF 4 66 266
Pentium
II 266 MHz
ON OFF ON OFF 4.5 66 300
Pentium
II 300 MHz
OFF ON ON OFF 5 66 333
Pentium
II 333 MHz
ON ON ON OFF 5.5 66 366
Pentium
II 366 MHz
M The CPU is a sensitive electric component and it can be easily
damaged by static electricity, so users must keep it away from
metal surface when the CPU is installed onto mainboard.
3-5
Page 17
Hardware Installation
3.6. CMOS RTC & ISA CFG CMOS SRAM
There're RTC & CMOS SRAM on board, they have a power supply from
internal battery to keep the DATA inviolate & effective. The RTC is a REALTIME CLOCK device which provides the DATE & TIME to system.
The CMOS SRAM is used for keeping the information of ISA device system
configuration, so the system can automatically boot OS. every time.
Due to the life-time of RTC internal battery is 5 years, the user can change a
new RTC to replace old one after it can not work. The new one's brand and
type must be same with old one.
3.7. SPEAKER CONNECTOR INSTALLATION
There is always a speaker in AT system for sound purpose. The 4-Pins
connector J3 is used to connect speaker.
The speaker can work well in both direction of connector when it is installed
to the connector J3 on mainboard.
3.8. HARDWARE RESET SWITCH CONNECTOR INSTALLATION
The RESET switch on panel provides users with HARDWARE RESET
function which is almost the same as power-on/off.
The system will do a cold start after the RESET switch is pushed and
released by user. The RESET switch is a 2 PIN connector and should be
installed to J4 on mainboard.
3.9. POWER LED CONNECTOR INSTALLATION
There are a system power LED lamp on the panel of case. The power LED
will light on when system is powered-on, which is connected to a 3 PIN
connector.
The connector should be connected to J5 of mainboard in correct direction.
3.10. GREEN LED INSTALLATION
The J8 is a indicator (green LED) for green function. If the green LED is ON,
the system is operating in green mode.
3-6
Page 18
GA-686KX
3.11. IDE & ATAPI DEVICE INSTALLATION
There are two Enhance PCI IDE ports (CN6,7) on board, which following
ATAPI standard SPEC. Any one IDE port can connected to two ATAPI
devices (IDE Hard Disk, CD-ROM & Tape Driver), so total four ATAPI devices
can exist in a system.
The booting Hard Disk should be the Master device of 1st IDE channel. The
J6 is the active LED port for ATAPI device.
3.12. PERIPHERAL DEVICE INSTALLATION
After the I/O device installation and jumpers setup, the mainboard can be
mounted into the case and fixed by screw.
To complete the mainboard installation, the peripheral device could be
installed now. The basic system needs a display interface card.
If the PCI - Bus device is to be installed in the system, any one of five PCI Bus slots can be used.
3.13. KEYBOARD & PS/2 MOUSE INSTALLATION
The main board supports PS/2 connector type keyboard & Mouse (CN4).
The BIOS will auto detect whether the PS/2 Mouse is installed or nor &
assign IRQ12 for Mouse port if which was installed.
After installing the peripheral device, the user should check everything again,
and prepare to power-on the system.
3.14. KEYBOARD SETTING FUNCTION
After booting the O.S., there are some special functions used by keyboard as
follows:
"CTRL_ALT_DEL" - Pressing these keys simultaneously will cause
system to Warm Start (Software Reset).
3-7
Page 19
BIOS Configuration
4. BIOS CONFIGURATION
Award's BIOS ROM has a built-in Setup program that allows users to modify
the basic system configuration.
This type of information is stored in battery-backed CMOS SRAM so that it
retains the Setup information when the power is turned off.
4.1. ENTERING SETUP
Power ON the computer and press <Del> immediately will allow you to enter
Setup.
The other way to enter Setup is to power on the computer, when the below
message appears briefly at the bottom of the screen during the POST
(PowerOnSelfTest), press<Del>key or simultaneously press<Ctrl>,<Alt>,
and <Esc> keys.
TO ENTER SETUP BEFORE BOOT PRESS CTRL-ALT-ESC OR DEL KEY
If the message disappears before you respond and you still wish to enter
Setup, restart the system to try again by turning it OFF then ON or pressing
the "RESET" bottom on the system case.
You may also restart by simultaneously press <Ctrl>,<Alt>,and<Del> keys.
If you do not press the keys at the correct time and the system does not boot,
an error message will be displayed and you will again be asked to,
PRESS F1 TO CONTINUE, CTRL-ALT-ESC OR DEL TO ENTER SETUP
4-1
Page 20
GA-686KX
4.2. CONTROL KEYS
Up arrow Move to previous item
Down arrow Move to next item
Left arrow Move to the item in the left hand
Right arrow Move to the item in the right hand
Esc key Main Menu - Quit and not save changes into CMOS
Status Page Setup Menu and Option Page Setup Menu Exit current page and return to Main Menu
PgUp key Increase the numeric value or make changes
PgDn key Decrease the numeric value or make changes
F1 key General help, only for Status Page Setup Menu and Option
Page Setup Menu
F2 key Change color from total 16 colors
F3 key Calendar, only for Status Page Setup Menu
F4 key Reserved
F5 key Restore the previous CMOS value from CMOS, only for
Option Page Setup Menu
F6 key Load the default CMOS value from BIOS default table, only
for Option Page Setup Menu
F7 key Load the default
F8 key Reserved
F9 key Reserved
F10 key Save all the CMOS changes, only for Main Menu
4.3. GETTING HELP
4-2
Page 21
BIOS Configuration
4.3.1. Main Menu
The on-line description of the highlighted setup function is displayed at the
bottom of the screen.
4.3.2. Status Page Setup Menu / Option Page Setup Menu
Press F1 to pop up a small help window that describes the appropriate keys
to use and the possible selections for the highlighted item. To exit the Help
Window press <Esc>.
4.4. THE MAIN MENU
Once you enter Award BIOS CMOS Setup Utility, the Main Menu (Figure 4.1)
will appear on the screen.
The Main Menu allows you to select from seven setup functions and two exit
choices. Use arrow keys to select among the items and press <Enter> to
accept or enter the sub-menu.
ROM PCI / ISA BIOS
CMOS SETUP UTILITY
AWARD SOFTWARE, INC.
STANDARD CMOS SETUP
BIOS FEATURES SETUP
CHIPSET FEATURES SETUP
PNP/PCI CONFIGURATION
LOAD SETUP DEFAULTS
USER PASSWORD
IDE HDD AUTO DETECTION
SAVE & EXIT SETUP
EXIT WITHOUT SAVING
ESC
F10
: Quit
: Save & Exit Setup
(Shift)F2
: Select Item
: Chang e Color
Time, Date, Hard Disk Type, ...
POWER MANAGEMENT SETUP
INTEGRATED PERIPHERALS
HDD LOW LEVEL FORMAT
Figure 4.1: Main Menu
· Standard CMOS setup
4-3
Page 22
GA-686KX
This setup page includes all the items in a standard compatible BIOS.
· BIOS features setup
This setup page includes all the items of Award special enhanced
features.
· Chipset features setup
This setup page includes all the items of chipset special features.
· Power management setup
This setup page includes all the items of Green function features.
· PNP/PCI configuration
This setup page includes all the configurations of PCI & PNP ISA
resources.
· Integrated peripherals
This setup page includes all onboard peripherals.
· Load setup defaults
BIOS defaults indicates the most appropriate value of the system
parameter which the system would be in safe configuration.
· User password
Change, set, or disable password. It allows you to limit access to the
system and Setup, or just to Setup.
· IDE HDD auto detection
Automatically configure hard disk parameter.
· HDD low level format
Low level format IDE Hard Disk.
· Save & exit setup
Save CMOS value changes to CMOS and exit setup.
· Exit without save
4-4
Page 23
BIOS Configuration
Abandon all CMOS value changes and exit setup.
4.5. STANDARD CMOS SETUP MENU
The items in Standard CMOS Setup Menu (Figure 4.2) are divided into 9
categories. Each category includes no, one or more than one setup items.
Use the arrows to highlight the item and then use the <PgUp> or <PgDn>
keys to select the value you want in each item.
Figure 4.2: Standard CMOS Setup Menu
· Date
The date format is <day>, <date> <month> <year>. Press <F3> to show
the calendar.
day The day, from Sun to Sat, determined by the BIOS and is
display-only
date The date, from 1 to 31 (or the maximum allowed in the
month)
month The month, Jan. through Dec.
4-5
Page 24
GA-686KX
year The year, from 1900 through 2099
· Time
The time format in <hour> <minute> <second>. The time is calculated
base on the 24-hour military-time clock. For example, 1 p.m. is 13:00:00.
· Primary HDDs / Secondary HDDs
The category identify the types of hard disk drive C drive F 4 devices that
has been installed in the computer. There are 45 pre-defined types and a
user definable type. Type 1 to Type 45 are pre-defined. Type User is
user-definable and type Auto will automatically detect HDD's type..
Press PgUp or PgDn to select a numbered hard disk type or type the
number and press <Enter>. Note that the specifications of your drive
must match with the drive table. The hard disk will not work properly if
you enter improper information for this category.
If your hard disk drive type is not matched or listed, you can use Type
User to define your own drive type manually. If you select Type User,
related information is asked to be entered to the following items. Enter
the information directly from the keyboard and press <Enter>. Those
information should be provided in the documentation form your hard disk
vendor or the system manufacturer.
CYLS. Number of cylinders
HEADS number of heads
PRECOMP write precomp
LANDZONE landing zone
SECTORS number of sectors
If a hard disk has not been installed select NONE and press <Enter>.
· Drive A type / Drive B type
The category identify the types of floppy disk drive A or drive B that has
been installed in the computer.
None No floppy drive installed
360K, 5.25 in. 5-1/4 inch PC-type standard drive; 360 kilobyte
capacity.
1.2M, 5.25 in. 5-1/4 inch AT-type high-density drive; 1.2 megabyte
capacity (3-1/2 inch when 3 Mode is Enabled).
4-6
Page 25
BIOS Configuration
720K, 3.5 in. 3-1/2 inch double-sided drive; 720 kilobyte capacity
1.44M, 3.5 in. 3-1/2 inch double-sided drive; 1.44 megabyte
capacity.
· Floppy 3 Mode Support (for Japan Area)
Disable Normal Floppy Drive.
Drive A Drive A is 3 mode Floppy Drive.
Drive B Drive B is 3 mode Floppy Drive.
Both Drive A & B are 3 mode Floppy Drive.
· Video
The category detects the type of adapter used for the primary system
monitor that must matches your video display card and monitor. Although
secondary monitors are supported, you do not have to select the type in
setup.
EGA/VGA Enhanced Graphics Adapter/Video Graphics Array. For
EGA, VGA, SVGA, or PGA monitor adapters
CGA 40 Color Graphics Adapter, power up in 40 column mode
CGA 80 Color Graphics Adapter, power up in 80 column mode
MONO Monochrome adapter, includes high resolution
monochrome adapters
· Halt on
The category determines whether the computer will stop if an error is
detected during power up.
NO errors The system boot will not be stopped for any error
that may be detected
All errors Whenever the BIOS detects a non-fatal error the
system will be stopped and you will be prompted
All, But Keyboard The system boot will not stop for a keyboard error;
it will stop for all other errors
All, But Diskette The system boot will not stop for a disk error; it
4-7
Page 26
GA-686KX
will stop for all other errors
All, But Disk/Key The system boot will not stop for a keyboard or
disk error; it will stop for all other errors
· Memory
The category is display-only which is determined by POST (Power On
Self Test) of the BIOS.
Base Memory
The POST of the BIOS will determine the amount of base (or
conventional) memory installed in the system.
The value of the base memory is typically 512 K for systems
with 512 K memory installed on the motherboard, or 640 K for
systems with 640 K or more memory installed on the
motherboard.
Extended Memory
The BIOS determines how much extended memory is present
during the POST.
This is the amount of memory located above 1 MB in the CPU's
memory address map.
Expanded Memory
Expanded Memory in memory defined by the
Lotus/Intel/Microsoft (LIM) standard as EMS.
Many standard DOS applications can not utilize memory above
640K, the Expanded Memory Specification (EMS) swaps
memory which not utilized by DOS with a section, or frame, so
these applications can access all of the system memory.
Memory can be swapped by EMS is usually 64K within 1 MB or
memory above 1 MB, depends on the chipset design.
Expanded memory device driver is required to use memory as
Expanded Memory.
Other Memory
This refers to the memory located in the 640K to 1024K
address space. This is memory that can be used for different
applications.
4-8
Page 27
BIOS Configuration
DOS uses this area to load device drivers to keep as much
base memory free for application programs. Most use for this
area is Shadow RAM.
4.6. BIOS FEATURES SETUP
ROM PCI / ISA BIOS
BIOS FEATURES SETUP
AWARD SOFTWARE, INC.
: Select Item
Virus Warning
CPU Internal Cache
External Cache
Boot Sequence
Boot Up Floppy Seek
Boot Up NumLock Status
Security Option
Video BIOS Shadow
C8000 - CBFFF Shadow
: On
: Enabled
: Enabled
: Enabled
: A, C, SCSI
: Setup
: Enabled
: Disabled
ESC
F1
F5
F7
: Load Setup Defaults
: Quit
: Help
: Old Values
PU/PD/+/-
(Shift)F2
: Modify
: Color
Quick Power On Self Test
: Disabled
Swap Floppy Drive
: Disabled
: Disabled
D0000 - D3FFF Shadow
: Disabled
D8000 - DBFFF Shadow
CC000 - CFFFF Shadow
: Disabled
: Disabled
D4000 - D7FFF Shadow
: Disabled
DC000 - DFFFF Shadow
PCI/VGA Palette Snoop
: Disabled
Typematic Rate Setting
Typematic Rate (Chars/Sec)
Typematic Delay (Msec)
: Off
: 6
: 250
OS Select For DRAM >64MB
: Non-OS2
: Disabled
**CPU FAN Failure Alarm**
Slow Down CPU When Overheat
: No
: Disabled
Figure 4.3: BIOS Features Setup
· Virus Warning
This category flashes on the screen. During and after the system boots
up, any attempt to write to the boot sector or partition table of the hard
disk drive will halt the system and the following error message will
appear, in the mean time, you can run anti-virus program to locate the
problem. Default value is Disabled.
Enabled Activate automatically when the system boots up causing a
warning message to appear when anything attempts to
access the boot sector or hard disk partition table
Disabled No warning message to appear when anything attempts to
access the boot sector or hard disk partition table
· CPU Internal Cache / External Cache
These two categories speed up memory access. However, it depends on
CPU / chipset design. The default value is Enabled.
4-9
Page 28
GA-686KX
Enabled Enable cache
Disabled Disable cache
· Quick Power On Self Test
This category speeds up Power On Self Test (POST) after you power on
the computer. If it is set to Enable, BIOS will shorten or skip some check
items during POST. The default value is Disabled.
Enabled Enable quick POST
Disabled Normal POST
· Boot Sequence
This category determines which drive computer searches first for the disk
operating system (i.e., DOS). Default value is A,C, SCSI.
X1, X2, X3 System will first search for X1 disk drive then X2 disk
drive and then X3 disk drive.
· Swap Floppy Drive
The default value is Disabled.
Enabled Floppy A & B will be swapped under DOS
Disabled Floppy A & B will be normal definition
· Boot Up Floppy Seek
During POST, BIOS will determine if the floppy disk drive installed is 40
or 80 tracks. 360K type is 40 tracks while 720K, 1.2M and 1.44M are
all 80 tracks. The default value is Enabled.
Enabled BIOS searches for floppy disk drive to determine if it is 40
or 80 tracks. Note that BIOS can not tell from 720K, 1.2M
or 1.44M drive type as they are all 80 tracks
Disabled BIOS will not search for the type of floppy disk drive by
track number. Note that there will not be any warning
message if the drive installed is 360K
· Boot Up NumLock Status
The default value is On.
On Keypad is number keys
4-10
Page 29
BIOS Configuration
Off Keypad is arrow keys
· CPU FAN Failure Alarm
The default value is Off.
On The onboard Buzzer will alarm when detect the “CPU FAN
Failure”（must use FAN with sense function）.
Off Function disable（If use heat sink without FAN or no-
sense function FAN）.
· Slow Down CPU When overheat or CPU FAN Failure
The default value is No.
Yes The onboard Buzzer will alarm & slow down CPU speed
when detect “CPU overheat” or CPU FAN Failure”.
No The onboard Buzzer will alarm but not slow down CPU
when detect “CPU overheat” or CPU FAN Failure”.
· Boot Up NumLock Status
The default value is On.
On Keypad is number keys
Off Keypad is arrow keys
· Typematic Rate Setting
The default value is Disabled.
Enabled Enable Keyboard typematic rate setting.
Disabled Disable Keyboard typematic rate setting.
· Typematic Rate (Chars / Sec)
The default value is 6.
6-30 Set the maximum typematic rate from 6 chars. per second
to 30 chars. per second.
· Typematic Delay (Msec)
4-11
Page 30
GA-686KX
The default value is 250.
250-1000 Set the time delay from first key to repeat the same key
in to computer.
· Security Option
This category allows you to limit access to the system and Setup, or just
to Setup. The default value is Setup.
System The system will not boot and access to Setup will be
denied if the correct password is not entered at the prompt
Setup The system will boot, but access to Setup will be denied if
the correct password is not entered at the prompt
M To disable security, select PASSWORD SETTING at Main Menu and
then you will be asked to enter password. Do not type anything and
just press <Enter>, it will disable security. Once the security is
disabled, the system will boot and you can enter Setup freely.
· Video BIOS Shadow
It determines whether video BIOS will copied to RAM, however, it is
optional from chipset design. Video Shadow will increase the video
speed. The default value is Enable.
Enabled Video shadow is enabled
Disabled Video shadow is disabled
· PCI/VGA Palette Snoop
The default value are Disabled.
Enabled For having Video Card on ISA Bus and VGA Card on PCI
Bus.
Disabled For VGA Card only.
· OS Select For DRAM>64MB
The default value is Non-OS2.
Non-OS2 Using non-OS2 operating system.
OS2 Using OS2 operating system and DRAM>64MB.
· C8000 - CFFFF Shadow / D0000 - DFFFF Shadow
These categories determine whether optional ROM will be copied to
4-12
Page 31
BIOS Configuration
RAM by 16K byte. The default value are Disabled.
Enabled Optional shadow is enabled
Disabled Optional shadow is disabled
4.7. CHIPSET FEATURES SETUP
Figure 4.4: Chipset Features Setup
· Auto Configuration
The default value is Enabled.
Enable For 60 - 70ns DRAM Timing.
Disable For slow speed DRAM Timing.
· DRAM speed selection
The default value is 60 - 70ns.
60 - 70ns For 60 - 70ns DRAM.
50 - 60ns For 60ns DRAM (The best performance).
· DRAM ECC/PARITY select
4-13
Page 32
GA-686KX
The default value is Disabled.
ECC Enable ECC function when using 36 bit DRAM Module.
PARITY Enable PARITY function when using 36 bit DRAM Module.
Disabled Disable ECC & PARITY function.
· PCI VGA Burst Write
The default value is Enabled.
Disabled Disable this function.
Enabled Enable this function to better VGA performance; while
some brands of VGA must be disabled this function
(e.g.ET4000W32P).
· Video RAM Cacheable
The default value is Disabled.
Disabled Disable this function.
Enabled Enable this function to better VGA performance; while
some brands of VGA must be disabled this function
(e.g.ET4000W32P).
· Memory Hole At 15M-16M
The default value is Disabled.
Disabled Normal Setting.
Enabled Set Address=15~16MB remap to ISA BUS.
4.8. POWER MANAGEMENT SETUP
4-14
Page 33
BIOS Configuration
Figure 4.5: Power Management Setup
· Power Management
The default value is Enabled.
Enabled Enable Green function.
Disabled Disable Green function.
Please disable Green Function for Non-S CPU in OS/2, Unix, Window
NT & Novell system.
· PM Control by APM
The default value is Yes.
Yes Enable software APM function.
No Disable software APM function.
· Video off Method
The default value is DPMS Support.
V/H SYNC + Blank BIOS will turn off V/H-SYNC when gets into
Green mode for Green monitor power saving.
4-15
Page 34
GA-686KX
Blank Screen BIOS will only black monitor when gets into
Green mode.
DPMS Support BIOS will use DPMS Standard to control VGA
card. (The Green type VGA card will turn of V/HSYNC automatically.)
· Standby Mode ( for Network Card using )
The default value is Disable.
Disable Disable Standby Mode.
1 min - 1 Hour Setup the timer to enter Standby Mode.
· Suspend mode ( for CPU stop clock Mode )
The default value is Disable.
Disable Disable Suspend Mode.
1 min - 1 Hour Setup the timer to enter Suspend Mode.
· HDD Power Down
The default value is Disable.
Disable Disable HDD Power Down mode function.
1-15 mins Enable HDD enter Power Down mode between 1 to 15
mins.
· IRQX ( 3,4,5,6,7,9,10,11,12,14,15 )
The default value is On.
On The system will return to normal mode from Green Mode
when the IRQX is active.
Off The system will not return to normal mode from Green
Mode when the IRQX is active.
4.9. PNP/PCI CONFIGURATION
4-16
Page 35
BIOS Configuration
Figure 4.6: PCI Slot Configuration
· Resources Controlled by
The default value is Manual.
Manual User can set the PnP resource (I/O Address, IRQ & DMA
channels) used by legacy ISA DEVICE.
Auto BIOS automatically use these PnP rescuers.
· IRQ (3,4,5,7,9,10,11,12,14,15),DMA(0,1,3,5,6,7) assigned to
The default value is "Legacy ISA" or "PCI/ISA PnP".
Legacy ISA The resource is used by Legacy ISA device.
PCI/ISA PnP The resource is used by PCI/ISA PnP device (PCI or
ISA).
4.10. INTEGRATED PERIPHERALS
4-17
Page 36
GA-686KX
Figure 4.7: Load Setup Defaults
· IDE HDD Block Mode
The default value is Enabled.
Enabled Enable IDE HDD Block Mode
Disabled Disable IDE HDD Block Mode
· IDE Primary Master PIO (for onboard IDE 1st channel).
The default value is Auto.
Auto BIOS will automatically defect the IDE HDD Accessing
mode.
Mode0~4 Manually set the IDE Accessing mode.
· IDE Primary Slave PIO (for onboard IDE 1st channel).
The default value is Auto.
Auto BIOS will automatically defect the IDE HDD Accessing
mode.
Mode0~4 Manually set the IDE Accessing mode.
· IDE Secondary Master PIO (for onboard IDE 2nd channel).
4-18
Page 37
BIOS Configuration
The default value is Auto.
Auto BIOS will automatically defect the IDE HDD Accessing
mode.
Mode0~4 Manually set the IDE Accessing mode.
· IDE Secondary Slave PIO (for onboard IDE 2nd channel).
The default value is Auto.
Auto BIOS will automatically defect the IDE HDD Accessing
mode.
Mode0~4 Manually set the IDE Accessing mode.
· On-Chip Primary IDE
The default value is Enabled.
Enabled Enable onboard 1st channel IDE port.
Disabled Disable onboard 1st channel IDE port.
· On-Chip Secondary IDE
The default value is Enabled.
Enabled Enable onboard 2nd channel IDE port.
Disabled Disable onboard 2nd channel IDE port.
· PCI Slot IDE 2nd Channel
The default value is Enabled.
Enabled Enable PCI BUS Device's 2nd IDE Channel
Disabled Disable PCI BUS Device’s 2nd IDE Channel
· Onboard FDD Controller
The default value is Enabled.
Enabled Enable onboard FDD port.
Disabled Disable onboard FDD port.
· Onboard Serial Port 1
The default value is COM1/3F8.
Auto BIOS will automatically setup the port A address.
COM1/3F8 Enable onboard Serial port A and address is 3F8.
COM2/2F8 Enable onboard Serial port A and address is 2F8.
COM3/3E8 Enable onboard Serial port A and address is 3E8.
4-19
Page 38
GA-686KX
COM4/2E8 Enable onboard Serial port A and address is 2E8.
Disabled Disable onboard Serial port A.
· Onboard Serial Port 2
The default value is Auto.
Auto BIOS will automatically setup the port B address.
COM1/3F8 Enable onboard Serial port B and address is 3F8.
COM2/2F8 Enable onboard Serial port B and address is 2F8.
COM3/3E8 Enable onboard Serial port B and address is 3E8.
COM4/2E8 Enable onboard Serial port B and address is 2E8.
Disabled Disable onboard Serial port B.
· Onboard Parallel port
The default value is 378/IRQ7.
378 Enable onboard LPT port and address is 378/IRQ7.
278 Enable onboard LPT port and address is 278/IRQ5.
Disabled Disable onboard LPT port.
3BC Enable onboard LPT port and address is 3BC/IRQ7.
· Onboard Parallel Mode
The default value is SPP.
SPP Using Parallel port as Normal Printer Port.
EPP Using Parallel port as Enhanced Parallel Port.
ECP Using Parallel port as Extended Capabilities Port.
ECP+EPP Using Parallel port as ECP & EPP mode.
· USB Controller
The default value is Disabled.
Enabled Enable the USB function.
Disabled Disable the USB function.
4.11. LOAD SETUP DEFAULTS
4-20
Page 39
BIOS Configuration
INTEGRATED PERIPHERALS
ROM PCI / ISA BIOS
LOAD SETUP DEFAULTS
AWARD SOFTWARE, INC.
STANDARD CMOS SETUP
BIOS FEATURES SETUP
CHIPSET FEATURES SETUP
PNP/PCI CONFIGURATION
LOAD SETUP DEFAULTS
USER PASSWORD
SAVE & EXIT SETU P
EXIT WITHOUT SAVING
ESC
F10
: Quit
: Save & Exit Setup
(Shift)F2
: Select Item
: Change Color
Load SETU P Defaults (Y/N)? N
Load SETUP Defaults except Standard CMOS SETUP
IDE HDD AUTO DETECTION
POWER MANAGEMENT SETUP
HDD LOW LEVEL FORMAT
Figure 4.7: Load Setup Defaults
· Load SETUP Defaults
To load SETUP defaults value to CMOS SRAM, enter "Y". If not, enter
"N".
M If there is any problem occurred, loading SETUP DEFAULTS step is
recommended.
4.12. USER PASSWORD
When you select this function, the following message will appear at the
center of the screen to assist you in creating a password.
ENTER PASSWORD
4-21
Page 40
GA-686KX
INTEGRATED PERIPHERALS
ROM PCI / ISA BIOS
USER PASSWORD
AWARD SOFTWARE, INC.
STANDARD CMOS SETUP
BIOS FEATURES SETUP
CHIPSET FEATURES SETUP
PNP/PCI CONFIGURATION
LOAD SETUP DEFAULTS
USER PASSWORD
SAVE & EXIT SETU P
EXIT WITHOUT SAVING
ESC
F10
: Quit
: Save & Exit Setup
(Shift)F2
: Select Item
: Change Color
Enter Password:
Change / Set / Disable Password
IDE HDD AUTO DETECTION
POWER MANAGEMENT SETUP
HDD LOW LEVEL FORMAT
Figure 4.8: Password Setting
Type the password, up to eight characters, and press <Enter>. The password
typed now will clear and previously entered password from CMOS memory.
You will be asked to confirm the password. Type the password again and
press <Enter>. You may also press <Esc> to abort the selection and not
enter a password.
To disable password, just press <Enter> when you are prompted to enter
password. A message will confirm the password being disabled. Once the
password is disabled, the system will boot and you can enter Setup freely.
PASSWORD DISABLED
If you select System at Security Option of BIOS Features Setup Menu, you
will be prompted for the password every time the system is rebooted or any
time you try to enter Setup. If you select Setup at Security Option of BIOS
Features Setup Menu, you will be prompted only when you try to enter Setup.
4.13. IDE HDD AUTO DETECTION
4-22
Page 41
BIOS Configuration
Figure 4.9: IDE HDD Auto Detection
Type "Y" will accept the H.D.D. parameter reported by BIOS.
Type "N" will keep the old H.D.D. parameter setup. If the hard disk cylinder
NO. is over 1024, then the user can select LBA mode or LARGER mode for
DOS partition LARGE than 528 MB.
4-23
Page 42
GA-686KX
4.14. HDD LOW LEVEL FORMAT
ROM PCI / ISA BIOS
USER PASSWORD
AWARD SOFTWARE, INC.
STANDARD CMOS SETUP
BIOS FEATURES SETUP
CHIPSET FEATURES SETUP
PNP/PCI CONFIGURATION
LOAD SETUP DEFAULTS
USER PASSWORD
SAVE & EXIT SETU P
EXIT WITHOUT SAVING
ESC
F10
: Quit
: Save & Exit Setup
(Shift)F2
: Select Item
: Change Color
IDE HDD AUTO DETECTION
POWER MANAGEMENT SETUP
INTEGRATED PERIPHERALS
HDD LOW LEVEL FORMAT
Hard Disk Low Level Format U tility
Figure 4.12: HDD Low Level Format
HDD Low Level Format Utility:
In main manual: There are three options to choose:
one is: SELECT DRIVE: "C" or "D".
another one is: BAD TRACK LIST: User can auto, add,
modify, delete, clear for bad track of HDD.
the other one is : PREFORMAT: Lower Level Format HDD.
4-24
Page 43
BIOS Configuration
4.15. SAVE & EXIT SETUP
INTEGRATED PERIPHERALS
SAVE & EXIT SETU P
EXIT WITHOUT SAVING
PNP/PCI CONFIGURATION
ROM PCI / ISA BIOS
SAVE & EXIT SETUP
AWARD SOFTWARE, INC.
STANDARD CMOS SETUP
BIOS FEATURES SETUP
CHIPSET FEATURES SETUP
LOAD SETUP DEFAULTS
USER PASSWORD
ESC
F10
: Quit
: Save & Exit Setup
(Shift)F2
: Select Item
: Change Color
SAVE to CMOS and EXIT (Y/N)? N
Save Data to CMOS & Exit SETUP
IDE HDD AUTO DETECTION
POWER MANAGEMENT SETUP
HDD LOW LEVEL FORMAT
Figure 4.10: Save & Exit Setup
Type "Y" will quit the Setup Utility and save the user setup value to RTC
CMOS SRAM.
Type "N" will return to Setup Utility.
4-25
Page 44
GA-686KX
4.16. EXIT WITHOUT SAVING
ROM PCI / ISA BIOS
EXIT WITH OUT SAVING
AWARD SOFTWARE, INC.
STANDARD CMOS SETUP
BIOS FEATURES SETUP
CHIPSET FEATURES SETUP
PCI CONFIGURATION
INTEGRATED PERIPHERALS
USER PASSWORD
SAVE & EXIT SETU P
EXIT WITHOUT SAVING
ESC
F10
: Quit
: Save & Exit Setup
(Shift)F2
: Select Item
: Change Color
Quit Without Saving (Y/N)? N
Abandon all Datas & Exit SETUP
IDE HDD AUTO DETECTION
POWER MANAGEMENT SETUP
LOAD SETUP DEFAULTS
HDD LOW LEVEL FORMAT
Figure 4.11: Exit Without Saving
Type "Y" will quit the Setup Utility without saving to RTC CMOS SRAM.
Type "N" will return to Setup Utility.
4-26
Page 45
GA-686KX
5. AT TECHNICAL INFORMATION
5.1. I/O BUS CONNECTOR PIN OUT
5.1.1. ISA SLOT PIN OUT
B23
B24
B31
B05
B07
B10
B13
B15
B19
B21
B25
B29
B02
B04
B08
B11
B14
B17
B20
B26
B27
B01
B03
B06
B09
B12
B16
B18
B22
B28
B30
-REFRESH
A05
A07
A10
A13
A15
A19
A21
A02
A04
A08
A11
A14
A17
A20
A01
A03
A06
A09
A12
A16
A18
A22
A23
A24
A31
A25
A29
A26
A27
A28
A30
D05
D07
D10
D13
D15
D02
D04
D08
D11
D14
D17
D01
D03
D06
D09
D12
D16
D18
C05
C07
C10
C13
C15
C02
C04
C08
C11
C14
C17
C01
C03
C06
C09
C12
C16
C18
SA19
SA18
SA17
SA16
SA15
SA14
SA13
SA12
SA11
SA10
SA09
SA08
SA07
SA06
SA05
SA04
SA03
SA02
SA01
SA00
SD07
SD06
SD04
SD03
SD02
SD05
SD00
SD01
-I/O CH RDY
AEN
-I/O CH CHKGND
RESET
+5V
IRQ9
-5V
DRQ2
-12V
0WS
+12V
GND
-SMEMW
-SMEMR
-IOW
-IOR
-DACK3
-DRQ3
-DACK1
-DRQ1
BCLK
IRQ7
IRQ6
IRQ5
IRQ4
IRQ3
-DACK2
T/C
BALE
+5V
OSC
GND
-MEMCS16
-I/OCS16
IRQ10
IRQ11
IRQ12
IRQ15
IRQ14
-DACK0
DRQ0
-DACK5
DRQ5
-DACK6
DRQ6
-DACK7
DRQ7
+5V
-MASTER
GND
SBHE
LA23
LA22
LA21
LA20
LA19
LA18
LA17
-MEMR
-MEMW
SD08
SD09
SD10
SD11
SD12
SD13
SD14
SD15
5-1
Page 46
AT Technical Information
5.1.2. PCI - BUS SLOT PIN OUT
B23
B24
B31
B05
B07
B10
B13
B15
B19
B21
B25
B29
B02
B04
B08
B11
B14
B17
B20
B26
B27
B01
B03
B06
B09
B12
B16
B18
B22
B28
B30
A05
A07
A10
A13
A15
A19
A21
A02
A04
A08
A11
A14
A17
A20
A01
A03
A06
A09
A12
A16
A18
A22
A23
A24
A31
A25
A29
A26
A27
A28
A30
B33
B34
B41
B35
B39
B36
B37
B32
B38
B40
A32
A33
A34
A41
A35
A39
A36
A37
A38
A40
B43
B44
B45
B49
B46
B47
B42
B48
A42
A43
A44
A45
A49
A46
A47
A48
B53
B54
B61
B55
B59
B56
B57
B52
B58
B60
A52
A53
A54
A61
A55
A59
A56
A57
A58
A60
B62 A62
NC
+12V
NC
NC
VCC
INTA#
INTC#
VCC
NC
VCC
NC
GND
GND
NC
NC
NC
NC
NC
NC
RST#
VCC
GNT#
GND
AD_30
AD_28
AD_26
GND
AD_24
IDSEL
NC
AD_22
AD_20
GND
AD_18
AD_16
FRAME#
GND
TRDY#
GND
STOP#
SDONE
SBO#
GND
PAR
AD_15
AD_13
AD_11
GND
AD_09
CBE#0
NC
AD_06
AD_04
GND
AD_02
AD_00
VCC
NC
VCC
VCC
NC
SERR#
NC
CBE#1
AD_14
GND
AD_12
AD_10
GND
AD_08
AD_07
NC
AD_05
AD_03
GND
AD_01
VCC
NC
VCC
VCC
AD_25
NC
CBE#3
AD_23
GND
AD_21
AD_19
NC
AD_17
CEB#2
GND
IRDY#
NC
DEVSEL#
GND
LOCK#
PERR#
VCC
INTB#
INTD#
PST#1
NC
PST#2
GND
GND
NC
GND
CLK
GND
REQ#
VCC
AD_31
AD_29
GND
AD_27
-12V
NC
GND
NC
VCC
5-2
Page 47
GA-686KX
5.2. I/O & MEMORY MAP
MEMORY MAP:
[0000000-009FFFF] System memory used by DOS and application program.
[00A0000-00BFFFF] Display buffer memory for VGA/ EGA/CGA/MONOCHROME adapter.
[00C0000-00DFFFF] Reserved for I/O device BIOS ROM or RAM buffer.
[00E0000-00EFFFF] Reserved for PCI device ROM.
[00F0000-00FFFFF] System BIOS ROM.
[0100000-BFFFFFF] System extension memory.
I/O MAP:
[000-01F] DMA controller.(Master)
[020-021] INTERRUPT controller.(Master)
[022-023] CHIPSET control registers I/O ports.
[040-05F] TIMER control registers.
[060-06F] KEYBOARD interface controller.(8042)
[070-07F] RTC ports & CMOS I/O ports.
[080-09F] DMA register.
[0A0-0BF] INTERRUPT controller.(Slave)
[0C0-0DF] DMA controller.(Slave)
[0F0-0FF] MATH COPROCESSOR
[1F0-1F8] HARD DISK controller.
[278-27F] PARALLEL port-2.
[2B0-2DF] GRAPHICS adapter controller.
[2F8-2FF] SERIAL port-2.
[360-36F] NETWORK ports.
[378-37F] PARALLEL port-1
[3B0-3BF] MONOCHROME & PRINTER adapter.
[3C0-3CF] EGA adapter.
[3D0-3DF] CGA adapter.
[3F0-3F7] FLOPPY DISK controller.
[3F8-3FF] SERIAL port-1.
5.3. TIMER & DMA CHANNELS MAP
TIMER MAP: TIMER Channel-0 System timer interrupt
TIMER Channel-1 DRAM REFRESH request
TIMER Channel-2 SPEAKER tone generator
DMA CHANNELS: DMA Channel-0 Available
DMA Channel-1 IBM SDLC
DMA Channel-2 FLOPPY DISK adapter
DMA Channel-3 Available
DMA Channel-4 Cascade for DMA controller 1
DMA Channel-5 Available
DMA Channel-6 Available
DMA Channel-7 Available
5.4. INTERRUPT MAP
5-3
Page 48
AT Technical Information
NMI: Parity check error
IRQ (H/W): 0 System TIMER interrupt from TIMER-0
1 KEYBOARD output buffer full
2 Cascade for IRQ 8-15
3 SERIAL port 2
4 SERIAL port 1
5 PARALLEL port 2
6 FLOPPY DISK adapter
7 PARALLEL port 1
8 RTC clock
9 Available
10 Available
11 Available
12 Available
13 MATH coprocessor
14 HARD DISK adapter
15 Available
5-4
Page 49
GA-686KX
5.5. RTC & CMOS RAM MAP
RTC & CMOS: 00 Seconds
01 Second alarm
02 Minutes
03 Minutes alarm
04 Hours
05 Hours alarm
06 Day of week
07 Day of month
08 Month
09 Year
0A Status register A
0B Status register B
0C Status register C
0D Status register D
0E Diagnostic status byte
0F Shutdown byte
10 FLOPPY DISK drive type byte
11 Reserve
12 HARD DISK type byte
13 Reserve
14 Equipment byte
15 Base memory low byte
16 Base memory high byte
17 Extension memory low byte
18 Extension memory high byte
19-2d
2E-2F
30 Reserved for extension memory low byte
31 Reserved for extension memory high byte
32 DATE CENTURY byte
33 INFORMATION FLAG
34-3F Reserve
40-7f Reserved for CHIPSET SETTING DATA
5-5
Page 50
Appendix A: Post Message
APPENDIX A: POST MESSAGE
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 the 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
Currently there is only 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 MESSAGE
Once or more of the following messages may be displayed if the BIOS
detects an error during the POST. This list includes message for both the
ISA and the EISA BIOS.
Ö CMOS BATTERY HAS FAILED
CMOS battery is no longer functional. It should be replaced.
Ö 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.
Ö DISK BOOT FAILURE, INSERT SYSTEM DISK AND PRESS ENTER
No boot device was found. Insert a system disk into Drive A: and press
<Enter>. If you assumed the system would boot 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.
Ö 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 re-configure the drive type correctly.
Ö DISPLAY SWITCH IS SET INCORRECTLY
A-1
Page 51
GA-686KX
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.
Ö 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.
Ö EISAConfigurationChecksumError
PLEASE RUN EISA CONFIGURATION UTILITY
The EISA non-volatile RAM checksum is incorrect or cannot correctly
read the EISA slot. This can indicate either the EISA non-volatile memory
has become corrupt or the slot has configured incorrectly. Also be sure
the card is installed firmly in the slot.
Ö EISAConfigurationIsNotComplete
PLEASE RUN EISA CONFIGURATION UTILITY
The slot configuration information stored in the EISA non-volatile memory
is incomplete.
F When either of these errors appear, the system will boot in ISA mode,
which allows you to run the EISA Configuration Utility.
Ö 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.
Ö ERROR INITIALIZING HARD DISK CONTROLLER
Cannot initialize controller. Make sure the cord 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 in the
hard drive.
Ö FLOPPY DISK CNTRLR ERROR OR NO CNTRLR PRESENT
Cannot find or initialize the floppy drive controller. Make sure the
A-2
Page 52
Appendix A: Post Message
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.
Ö InvalidEISAConfiguration
PLEASE RUN EISA CONFIGURATION UTILITY
The non-volatile memory containing EISA configuration information was
programmed incorrectly or has become corrupt. Re-run EISA
configuration utility to correctly program the memory.
F When this error appears, the system will boot in ISA mode, which allows
you to run the EISA Configuration Utility.
Ö 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.
Ö 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.
Ö 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.
Ö MEMORY SIZE HAS CHANGED SINCE LAST BOOT
Memory has been added or removed since the last boot. In EISA mode
use Configuration Utility to re-configure the memory configuration.
In ISA mode enter Setup and enter the new memory size in the memory
fields.
Ö Memory Verify Error at ...
Indicates an error verifying a value already written to memory. Use the
A-3
Page 53
GA-686KX
location along with your system's memory map to locate the bad chip.
Ö 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.
Ö 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.
Ö PRESS A KEY TO REBOOT
This will be displayed at the bottom screen when an error occurs that
requires you to reboot. Press any key and the system will reboot.
Ö PRESS F1 TO DISABLE NMI, F2 TO REBOOT
When BIOS detects a Non-maskable Interrupt condition during boot, this
will allow you to disable the NMI and continue to boot, or you can reboot
the system will the NMI enabled.
Ö RAM PARITY ERROR - CHECKING FOR SEGMENT ...
Indicates a parity error in Random Access Memory.
Ö ShouldBeEmptyButEISABoardFound
PLEASE RUN EISA CONFIGURATION UTILITY
A valid board ID was found in a slot that was configured as having no
board ID.
F When this error appears, the system will boot in ISA mode, which allows
you to run the EISA Configuration Utility.
Ö ShouldHaveEISABoardButNotFound
PLEASE RUN EISA CONFIGURATION UTILITY
A-4
Page 54
Appendix A: Post Message
The board installed is not responding to the ID request, or no board ID
has been found in the indicated slot.
F When this error appears, the system will boot in ISA mode, which allows
you to run the EISA Configuration Utility.
Ö Slot Not Empty
Indicates that a slot designated as empty by the EISA Configuration
Utility actually contains a board.
F When this error appears, the system will boot in ISA mode, which allows
you to run the EISA Configuration Utility.
Ö 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.
Ö WrongBoardInSlot
PLEASE RUN EISA CONFIGURATION UTILITY
The board ID does not match the ID stored in the EISA non-volatile
memory.
F When this error appears, the system will boot in ISA mode, which allows
you to run the EISA Configuration Utility.
A-5
Page 55
GA-686KX
APPENDIX B: POST CODES
F EISA POST codes are typically output to port address
300h. ISA POST codes are typically output to port
address 80h.
POST Name Description
C0 Turn Off Chipset
Cache
OEM Specific-Cache control.
1 Processor Test 1 Processor Status (1 FLAGS) Verification.
Test the following processor status flags
carry, zero, sign, overflow,
The BIOS will set each of these flags, verify they are
set, then turn each flag off and verify it is off.
2 Processor Test 2 Read/Write/Verify all CPU registers except SS, SP,
and BP with data pattern FF and 00.
3 Initialize Chips Disable NMI, PIE, AIE, UEI, SQWV.
Disable video, parity checking, DMA.
Reset math coprocessor.
Clear all page registers, CMOS shutdown byte.
Initialize timer 0, 1, and 2, including set EISA timer
to a known state.
Initialize DMA controllers 0 and 1.
Initialize interrupt controllers 0 and 1.
Initialize EISA extended registers.
4 Test Memory
Refresh Toggle
RAM must be periodically refreshed in order to keep
the memory from decaying. This function assures
that the memory refresh function is working properly.
5 Blank video,
Initialize keyboard
Keyboard controller initialization.
6 Reserved
7 Test CMOS
Interface and
Battery Status
Verifies CMOS is working correctly, detects bad
battery.
BE Chipset Default
Initialization
Program chipset registers with power on BIOS
defaults.
C1 Memory presence
test
OEM Specific-Test to size on-board memory.
C5 Early Shadow OEM Specific-Early Shadow enable for fast boot.
C6 Cache presence External cache size detection.
B-1
Page 56
Appendix B: Post Codes
test
8 Setup low memory Early chip set initialization.
Memory presence test.
OEM chip set routines.
Clear low 64 K of memory.
Test first 64 K memory.
9 Early Cache
Initialization
Cyrix CPU initialization.
Cache initialization.
A Setup Interrupt
Vector Table
Initialize first 120 interrupt vectors with
SPURIOUS_INT-HDLR and initialize INT 00h-1Fh
according to INT_TBL.
B Test CMOS RAM
Checksum
Test CMOS RAM Checksum, if bad, or insert key
pressed, load defaults.
C Initialize keyboard Detect type of keyboard controller (optional).
Set NUM_LOCK status.
D Initialize Video
Interface
Detect CPU clock.
Read CMOS location 14h to find out type of video in
use.
Detect and Initialize Video Adapter.
E Test Video
Memory
Test video memory, write sign-on message to
screen.
Setup shadow RAM - Enable shadow according to
Setup.
F Test DMA
Controller 0
BIOS checksum test.
Keyboard detect and initialization.
10 Test DMA
Controller 1
11 Test DMA Page
registers
Test DMA Page Registers.
12-13 Reserved
14 Test Timer
Counter 2
Test 8254 Timer 0 Counter 2.
15 Test 8259-1 Mask
Bits
Verify 8259 Channel 1 masked interrupts by
alternately turning off and on the interrupt lines.
16 Test 8259-2 Mask
Bits
Verify 8259 Channel 2 masked interrupts by
alternately turning off and on the interrupt lines.
17 Test Stuck 8259's
Interrupt Bits
Turn off interrupts then verify no interrupt mask
register is on.
18 Test 8259
Interrupt
Functionality
Force an interrupt and verify the interrupt occurred.
B-2
Page 57
GA-686KX
19 Test Stuck NMI
Bits (Parity/IO
Check)
Verify NMI can be cleared.
1A Display CPU clock.
1B-1E Reserved
1F Set EISA Mode If EISA non-volatile memory checksum is good,
execute EISA initialization. If not, execute ISA tests
an clear EISA mode flag.
Test EISA Configuration Memory Integrity
(checksum & communication interface).
20 Enable Slot 0 Initialize slot 0 (System Board).
21-2F Enable Slots 1-15 Initialize slot 1 through 15.
30 Size Base and
Extended Memory
Size base memory from 256 K to 640 K extended
memory above 1 MB.
31 Test Base and
Extended Memory
Test base memory from 256 K to 640 K and
extended memory above 1 MB using various
patterns.
F This will be skipped in EISA mode and can be
"skipped" with ESC key in ISA mode.
32 Test EISA
Extended Memory
If EISA Mode flag is set then test EISA memory
found in slots initialization.
F This will be skipped in ISA mode and can be
"skipped" with ESC key in EISA mode.
33-3B Reserved
3C Setup Enabled
3D Initialize & Install
Mouse
Detect if mouse is present, initialize mouse, install
interrupt vectors.
3E Setup Cache
Controller
Initialize cache controller.
3F Reserved
BF Chipset
Initialization
Program chipset registers with Setup values.
40 Display virus protest disable or enable.
41 Initialize Floppy
Drive & Controller
Initialize floppy disk drive controller and any drives.
42 Initialize Hard
Drive & Controller
Initialize hard drive controller and any drives.
43 Detect & Initialize
Serial/Parallel
Ports
Initialize any serial and parallel ports (also game
port).
44 Reserved
B-3
Page 58
Appendix B: Post Codes
45 Detect & Initialize
Math Coprocessor
Initialize math coprocessor.
46 Reserved
47 Reserved
48-4D Reserved
4E Manufacturing
POST Loop or
Display Messages
Reboot if Manufacturing POST Loop pin is set.
Otherwise display any messages (i.e., any non-fatal
errors that were detected during POST) and enter
Setup.
4F Security Check Ask password security (optional).
50 Write CMOS Write all CMOS values back to RAM and clear
screen.
51 Pre-boot Enable Enable parity checker.
Enable NMI, Enable cache before boot.
52 Initialize Option
ROMs
Initialize any option ROMs present from C8000h to
EFFFFh.
F When FSCAN option is enabled, will initialize
from C8000h to F7FFFh.
53 Initialize Time
Value
Initialize time value in 40h: BIOS area.
60 Setup Virus
Protect
Setup virus protect according to Setup
61 Set Boot Speed Set system speed for boot
62 Setup NumLock Setup NumLock status according to Setup
63 Boot Attempt Set low stack.
Boot via INT 19h.
B0 Spurious If interrupt occurs in protected mode.
B1 Unclaimed NMI If unmasked NMI occurs, display
Press F1 to disable NMI, F2 reboot.
E1-EF Setup Pages E1 - Page 1, E2 - Page 2, etc.
FF Boot
B-4
Page 59
GA-686KX
APPENDIX C: BIOS DEFAULT DRIVE
TABLE
Type Size
(MB)
Cylinders Heads Sectors Write /
Precomp
Land
Zone
Example Model
1 10 MB 306 4 17 128 305 TEAC SD510
MMI 112, 5412
2 20 MB 615 4 17 300 615 Seagate ST225,
ST4026
3 31 MB 615 6 17 300 615
4 62 MB 940 8 17 512 940
5 47 MB 940 6 17 512 940
6 20 MB 615 4 17 65535 615 Seagate ST125
Tandon TM262
7 31 MB 462 8 17 256 511
8 30 MB 733 5 17 65535 733 Tandon TM703
9 112 MB 900 15 17 65535 901
10 20 MB 820 3 17 65535 820
11 35 MB 855 5 17 65535 855
12 50 MB 855 7 17 65535 855
13 20 MB 306 8 17 128 319 Disctron526,
MMI M125
14 43 MB 733 7 17 65535 733
16 20 MB 612 4 17 0 663 Microscience
HH725
Syquest3250,
3425
17 41 MB 977 5 17 300 977
18 57 MB 977 7 17 65535 977
19 60 MB 1024 7 17 512 1023
20 30 MB 733 5 17 300 732
21 43 MB 733 7 17 300 732
22 30 MB 733 5 17 300 733 Seagate ST4038
23 10 MB 306 4 17 0 336
24 54 MB 925 7 17 0 925 Seagate ST4051
C-1
Page 60
Appendix C: BIOS Default Drive Table
25 69 MB 925 9 17 65535 925 Seagate ST4096
26 44 MB 754 7 17 754 754 Maxtor2085
27 69 MB 754 11 17 65535 754 Maxtor2140,
Priam S14
28 41 MB 699 7 17 256 699 Maxtor2190,
Priam S19
29 68 MB 823 10 17 65535 823 Maxtor1085
Micropolis1325
30 53 MB 918 7 17 918 918 Maxtor1105,
1120, 4780
31 94 MB 1024 11 17 65535 1024 Maxtor1170
32 128 MB 1024 15 17 65535 1024 CDC9415
33 43 MB 1024 5 17 1024 1024
34 10 MB 612 2 17 128 612
35 77 MB 1024 9 17 65535 1024
36 68 MB 1024 8 17 512 1024
37 41 MB 615 8 17 128 615
38 25 MB 987 3 17 987 987
39 57 MB 987 7 17 987 987 Maxtor1140,
4380
40 41 MB 820 6 17 820 820 Seagate ST251
41 41 MB 977 5 17 977 977 Seagate ST4053
Miniscribe3053/
6053
42 41 MB 981 5 17 981 981 Miniscribe3053/
6053 RLL
43 48 MB 830 7 17 512 830 Miniscribe 3650
44 69 MB 830 10 17 65535 830 Miniscribe 3650
RLL
45 114 MB 917 15 17 65535 918 Conner CP3104
46 152 MB 1224 15 17 65535 1223 Conner CP3204
User
C-2
Page 61
GA-686KX
APPENDIX D: PROBLEM SHEET
1. Customer Data
Name
Tel. No.
Address
Fax. No.
Purchase Date
2. Mainboard Date
Model NO.
GA- Rev. No.
Serial No.
3. System Configuration
CPU Type:
CPU Brand:
CPU Speed:
DRAM Type:
q 1 q 2 q 4 q 8 q 16 q 32 MB
DRAM Speed:
q 80 q 70 q 60 ns
DRAM Total Size:
MB
DRAM Brand:
SRAM Size:
q 64KB q 128 KB q 256 KB q 512 KB
SRAM Part No.
TAG: DATA:
Video Card:
Video Chip or Brand:
Floppy Drive A Capacity & Brand:
Floppy Drive B Capacity & Brand:
Storage Controller Type
q MFM q RLL q IDE q EDSI q SCSI
Hard Drive C Brand & Type:
Hard Drive D Brand & Type:
LAN Controller Type:
LAN Card Brand & Model:
Serial / Parallel Chip Brand & Model:
Mouse Brand & Model:
O.S.
q DOS q OS/2 q NETWARE q UNIX / XENIX Ver.:
4. AUTOEXEC.BAT & CONFIG.SYS File:
5. Problem Description:
R-01-02-070526
D-1
Page 62
Appendix E: FCC Document
APPENDIX E: FCC DOCUMENT
FCC Compliance Statement:
This equipment has been tested and found to comply with 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 in
residential installations. This equipment generates, uses, and can radiate
radio frequency energy, and if not installed and used in accordance with the
instructions, 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 interference to radio or television
equipment 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
-Move the equipment away from the receiver
-Plug the equipment into an outlet on a circuit different from that to which
the receiver is connected
-Consult the dealer or an experienced radio/television technician for
additional suggestions
E-1
DECLARATION OF CONFORMITY
Per FCC Part 2 Section 2. 1077(a)
Responsible Par ty Name: G.B.T. INC.
Address: 18305 Valley Blv d., Suite#A
LA Puent, CA 91744
Phone/Fax No: (8 18) 854-9338/ (818) 854-9339
hereby declares that the pro duct
Product Name:
Model Number:
Mother Board
GA-686KX
Conforms to the fol lowing specification s:
FCC Part 15, Subpart B, Section 15.107(a) and Section 15.109(a),
Class B Digit al Device
Supplementary Information:
This device compli es with part 15 of the F CC Rules. Op eration is subject to t he
following two con ditions: (1) This d evice may not cause harm ful interference,
and (2) this devic e must accept any inference receiv ed, including interferen ce
that may cause undesi red operation.
Representative Person' s Name: ERIC LU
Signature:
Date: Apr. 14, 1997
Eric Lu
Page 63
GA-686KX
You are cautioned that any change or modifications to the equipment not
expressly approve by the party responsible for compliance could void Your
authority to operate such equipment.
This device complies with Part 15 of the FCC Rules. Operation is subjected
to the following two conditions 1) this device may not cause harmful
interference and 2) this device must accept any interference received,
including interference that may cause undesired operation.
E-1
Loading...