¯All of the items or discription regarding VL-BUS
in this manual don't support those motherboards
without VL-BUS slots.
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.
IBM PC/AT, PC/XT are trademarks of International Business Machine Corporation.
AWARD is a trademark of AWARD Software, Inc.
Intel is a trademark of Intel Corporation, Inc.
MS-DOS, WINDOWS NT are registered trademarks of Microsoft Corporation.
UNIX is a trademark of Bell Laboratories.
Welcome to use the GA-486IM motherboard. The motherboard is a 128 KB - 512 KB
CACHE 486DX PC/AT compatible system with ISA bus, PCI (Peripheral Component
Interconnect) bus and VL (VESA Local) bus and it has been designed to be the
fastest 486 PC/AT system and the GREEN FUNCTION (Power-Down Mode) had
been added. There are some new features allowing 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.
1.2KEY FEATURES
Ø 80486 based PC/AT compatible mainboard with ISA, PCI and VL-Bus.
Ø 4 Master PCI bus slots and 2 Master VL bus slots.
Ø Supports 486DX / DX2 / SX / S-Series / OverDrive / P24T /P24D / DX4 running at
25 - 100 MHz.
Ø Supports True Green Function.
Ø Supports Intel, AMD, Cyrix and UMC CPU.
Ø Supports 237 pin (Socket 3) ZIF White socket / LIF socket on board.
Ø Supports 128 / 256 / 512 KB 2nd cache memory operated in BURST mode.
Ø Write-Back cache operation.
Ø Supports 2 - 128 MB DRAM memory on board.
Ø Supports shadow RAM for BIOS & VIDEO BIOS.
Ø Supports shadow RAM cacheable function to improve performance.
Ø Supports Hardware & Software speed change function.
Ø Licensed AWARD BIOS.
Ø 2/3 Baby AT size (22 cm x 25 cm) with 4 AT slots, 4 PCI slots and 2 VL slots.
The following performance data list is the testing results with some popular
benchmark testing programs. These datas are just reference for users by users, and
there is no responsibility for different testing data values gotten by users.( The
different H/W & S/W configuration will result in different benchmark testing results.)
CPU486DX4-100, DX4-75, DX2-80/66/50, DX-40/33.
DRAM32 MB - 70 ns.
CACHE256 KB
DISPLAYS3 86C864 PCI bus VGA.
IDEGA-107
O. S.MS-DOS 6.2
Connecting devices to a CPU local bus can dramatically increase the speed of I/Obound peripherals with only a slight increase in cost over traditional systems. This
price/performance point has created a vast market potential for local bus products.
The main barrier to this market has been the lack of an accepted standard for local
bus peripherals. Many mainboard and chipset manufactures developed their own
local bus implementations, but they are incompatible with each other. The VESA
(Video Electronics Standards Association) local bus and PCI (Peripheral Component
Interconnect) bus specification were created to end this confusion.
The PCI-bus standard, under development since Jun. 1992, which is designed to
bring workstation-level performance to standard PC platform. The PCI-bus removes
many of the bottlenecks that have hampered PC for several years. On the PCI-bus,
peripherals operate at the native speed of the computer system, thus enabling data
transfer between peripherals and the system at maximum speed. This performance is
critical for bandwidth-constrained devices such as video, multimedia, mass storage
and networking adapters.
The VL-bus standard, under development since November 1991, is designed to bring
workstation-level performance to a standard PC platform. The VL-bus removes many
of the bottlenecks that have happened PCs for several years. On the VL-bus,
peripherals operate at the native speed of the computer system, thus enabling data
transfer between peripherals and the system at maximum speed. This performance is
critical for bandwidth-constrained devices such as video, multimedia, mass storage,
and networking adapters.
PCI and VL-buses standard provide end-users with a low-cost, extendible and
portable local bus design, which will allow systems and peripherals from different
manufacturers to work togeter.
n AMBIENT TEMP.−0°C to +50°C (operating).
n RELATIVE HUM.−0 to +85% (operating).
n ALTITUDE−0 to 10,000 feet (operating).
n VIBRATION−0 to 1,000 Hz.
n ELECTRICITY−4.9 V to 5.2 V.
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.
M
Do not apply power to the board if it has been damaged..
You are now ready to install your maniboard. The mounting hole pattern on the
mainboard matches the IBM-XT system board. It is assumed that the chassis is
designed for a standard IBM XT/AT mainboard mounting.
Place the chassis on the anti-static mat and remove the cover. Take the plastic clips,
Nylon stand-off and screws for mounting the system board, and keep them separate.
If your power supply has signal to control the A.C. output, and then
the signal can be connected to JP28; when system gets into Green
mode, your power supply A.C. output will be turned OFF. By this way,
you can control your monitor ON/OFF or other devices.
JP6: AMD CPU Selection Jumper
1-2AMD DXL CPU X 3
2-3AMD DXL CPU X 2
This option is supported from PCB REV.2A.
3.4SRAM INSTALLATION AND JUMPERS SETUP
The cache memory system consists of two parts, one is TAG SRAM, the other is
DATA SRAM. The TAG SRAM type used in this mainboard is 8Kx8, 16Kx8 or 32Kx815ns , and the DATA SRAM type is 8Kx8-15ns, 32Kx8-15ns 64Kx8-20ns or 128Kx820ns.
The mainboard can be installed with 64, 128, 256 or 512 KB cache memory when
using 8Kx8 or 32Kx8 or 128Kx8 type DATA SRAM respectinely.
CACHE MEMORY SIZE SETTING
JUMPERJP19JP20JP21JP26
128 KBOFFOFFON2-3
256 KBOFFONON1-2
¬256 KBOFFONON2-3
512 KBONONON2-3
F 128 KB cache: Put 32 K X 8 in U25 ~ U28.
F 512 KB cache: Put 128 K X 8 in U25 ~ U28.
¬ 256 KB cache: Put 64 K X 8 in U25 ~ U28.
3.5CPU INSTALLATION AND JUMPERS SETUP
The system speed depends on the frequency of CLOCK GENERATOR. The user
can change the JP2 selection to set up the system speed at 25 MHz, 33 MHz ,40
MHz and 50 MHz for different CPU speeds.
The mainboard can use 80486DX, DX2, SX, OverDrive, P24T, P24D and DX4 CPU,
and the CPU speed must match with the frequency of CLOCK GEN. It will cause
system hanging up if the CLOCK GEN.'S frequency is higher than CPU's.
3.3V, 5V Auto switch. No Jumper needed to
switch CPU voltage.
JP4 open, JP23 2-3 open DX4 Running X3
CPUCLK, JP23 2-3 close DX4 Running X2
CPUCLK.
For internal Cache write-Through function, pls
set JP6 2-3 closed.
For internal Cache write-Back function, pls set
JP6 1-2 closed.
•AMD/UMC CPU:JP1 5-6, 7-8 closed.
RN3 8P4R 0 ohm installed.
JP13 open.
•Cyrix CPU:JP1 1-2, 3-4 closed.
RN1, RN4, 8P4R 0 ohm installed.
JP13 open.
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.
When the user installs the CPU on socket, please notice the PIN 1 of CPU is in the
same corner as the PIN 1 of socket!
Before the CPU is installed, the mainboard must be placed on a flat plane in order to
avoid being broken by the pressure of CPU installation.
GA-486IM can be installed with 1, 2, 4, 8, 16 or 32 MB 72 pins SIMM module DRAM.
The DRAM speed of both mainboard is using 60/70 ns. The banks of memory system
on GA-486IM includes from SIMM 1 to SIMM 4.
SIMM 1 and SIMM 2 is a group; SIMM 3 and SIMM 4 is the other group. One
group DRAM size can be 2, 4, 8, 16, 32, 64 MB, please install the same DRAM
size in one group. Total DRAM size is 2MB ~ 128 MB.
The DRAM installation position refer to MAINBOARD LAYOUT, 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.
3.7SPEAKER CONNECTOR INSTALLATION
There is always a speaker in AT system for sound purpose. The 4-Pins connector J4
is used to connect speaker. The speaker can work well in both direction of connector
when it is installed to the connector J4 on mainboard.
3.8POWER LED & KEY LOCK CONNECTOR
INSTALLATION
There are a system power LED lamp and a key on the panel of case. The power LED
will light on when system is powered-on, and the key can lock the keyboard input or
unlock it, both of them are connected to a 5 PIN connector. The connector should
be installed to J5 of mainboard in correct direction.
The TURBO switch on the panel is used for controlling the system speed. Some
program developed on XT should be executed with a low speed system, so a high
speed system needs the speed switching function to change its running speed.
Because a 80486 CPU cannot accept the real clock speed change when program is
executed, so the mainboard uses cache-enable or disable function to simulate
TURBO switching function. The J3 on mainboard should be connected to the TURBO
switch on panel, and user can push in or pop out the TURBO switch to enable or
disable the cache function of system.
3.10TURBO LED FLASH GREEN LED CONNECTOR
INSTALLATION
The TURBO LED on panel can indicate the current speed status of system. The
TURBO LED connector should be installed to JP24 in correct direction. Normally, the
JP24 is a TURBO LED connector. But when system gets into Green mode, the LED
on JP24 will light on once perosecond.
3.11HARDWARE 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 at ance. The Reset switch is a 2 PIN connector and
should be installed to J2 on mainboard.
3.12GREEN FUNCTION INSTALLATION
For the purpose of power saving, there are two jumpers, JP27 and JP12, to make
sure the power saving function doing well. The JP27 is a indicator (Green LED) for
Green function. If the green LED is ON, the system is operating in green mode. The
JP12 is a switch to force the system into Green mode immediately.
If the PCI-bus (VL-bus) device is to be installed in the system, any the of four PCIbus (VL-bus) slots can be used no matter Slave or Master PCI-bus (VL-bus) device
being installed,
After installing the peripheral device, the user should check everything again, and
prepare to power-on the system.
After the device installation and jumpers setup finished, the mainboard can be
mounted into the case and fixed with screws To complete the mainboard installation,
the peripheral device could be installed now. The basic system needs a display
interface card and a disk control interface card.
If the VL-Bus device is to be installed in the system, any one of three VL-Bus slots
can be used no matter Slave or Master VL-Bus device being installed.
After installing the peripheral device, the user should check everything again, and
prepare to poweron the system.
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.
4.1ENTERING 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 (Power On Self Test),
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
Up arrowMove to previous item
Down arrowMove to next item
Left arrowMove to the item in the left hand
Right arrowMove to the item in the right hand
Esc keyMain 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 keyIncrease the numeric value or make changes
PgDn keyDecrease the numeric value or make changes
F1 keyGeneral help, only for Status Page Setup Menu and Option Page
Setup Menu
F2 keyChange color from total 16 colors
F3 keyCalendar, only for Status Page Setup Menu
F4 keyReserved
F5 keyRestore the previous CMOS value from CMOS, only for Option
Page Setup Menu
F6 keyLoad the default CMOS value from BIOS default table, only for
Option Page Setup Menu
F7 keyLoad the default
F8 keyReserved
F9 keyReserved
F10 keySave all the CMOS changes, only for Main Menu
4.3GETTING HELP
4.3.1Main Menu
The on-line description of the highlighted setup function is displayed at the bottom of
the screen.
4.3.2Status 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 highlight item. To exit the Help Window press
<Esc>.
Once you enter Award BIOS CMOS Setup Utility, the Main Menu (Figure 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 ( 2A4X5G01 )
CMOS SETUP UTILITY
AWARD SOFTWARE, INC.
STANDARD CMOS SETUP
BIOS FEATURES SETUP
CHIPSET FEATURES SETUP
POWER MANAGEMENT SETUP
PCI/GREEN FUNCTION SETUP
LOAD SETUP DEFAULTS
ESC
: Quit
F10
: Save & Exit Setup(Shift)F2
Time, Date, Hard Disk Type, ...
PASSWORD SETTING
IDE HDD AUTO DETECTION
HDD LOW LEVEL FORMAT
SAVE & EXIT SETUP
EXIT WITHOUT SAVING
: Select Item
: Change Color
Standard CMOS setup
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 item of power management features.
SETUP defaults indicate the most appropriate value of the system parameter
which the system would be in maximum performance.
Password setting
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.
Save & exit setup
Save CMOS value changes to CMOS and exit setup.
Exit without save
Abandon all CMOS value changes and exit setup.
4.5STANDARD CMOS SETUP MENU
The items in Standard CMOS Setup Menu (Figure 2) are divided into 9 categories.
Each category includes none, 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.
The category identify the types of hard disk drive C or drive D that has
been installed in the computer. There are 46 pre-defined types and a user
definable type. Type 1 to Type 46 are pre-defined. Type User is userdefinable.
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
HEADSnumber of heads
PRECOMPwrite precom
LANDZONElanding zone
SECTORSnumber 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.
The category detects the type of adapter used for the primary system
monitor that must match your video display card and monitor. Although
secondary monitors are supported, you do not have to select the type in
setup.
EGA/VGAEnhanced Graphics Adapter/Video Graphics Array. For
EGA, VGA, SVGA, or PGA monitor adapters
CGA 40Color Graphics Adapter, power up in 40 column mode
CGA 80Color Graphics Adapter, power up in 80 column mode
MONOMonochrome adapter, includes high resolution
monochrome adapters
Halt on
The category determines whether the computer will stop if an error is
detected during power up.
All errorsWhenever the BIOS detects a non-fatal error the
system will be stopped and you will be prompted
No errorsThe system boot will not stop for any error that
may be detected
All,
But Keyboard
All, But
Diskette
All, But
Disk/Key
Memory
The category is display-only which is determined by POST (Power On Self
Test) of the BIOS.
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 presented 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 64KB, the Expanded Memory Specification (EMS) swaps memory which is
not utilized by DOS with a section, or frame, so these applications can
access to all of the system memory. Memory can be swapped by EMS is usually
64KB within 1 MB or memory above 1 MB, depending 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 640KB to 1024KB address space.
This is the memory that can be used for different applications. 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.
Security Option: Setup
Virus Warning
CPU Internal Cache
External Cache
Quick Power On Self Test: Enabled
Boot Sequence
Swap Floppy Drive: Disabled
Boot Up Floppy Seek
Boot Up NumLock Status
IDE HDD Block Mode
Turbo SW Function Enable : Yes
SetupAsking password when enter CMOS Setup.
SystemAsking password when enter CMOS Setup and boot system.
: Select Item
: Modify
: Color
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.
EnabledActivate automatically when the system boots up and
causes a warning message to appear when anything
attempts to access to the boot sector or hard disk
partition table
DisabledNo warning message to appear when anything attempts to
access to the boot sector or hard disk partition table
These two categories speed up memory access. However, it depends on CPU /
chipset design. The default value is Enabled.
EnabledEnable cache
DisabledDisable 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 Enabled.
EnabledEnable quick POST
DisabledNormal POST
Boot Sequence
This category determines which drive computer searches first for the disk
operating system (i.e., DOS). Default value is A,C.
A,CSystem will first search for floppy disk drive and then
hard disk drive
C,ASystem will first search for hard disk drive and then
floppy disk drive
Swap Floppy Drive
The default value is Disabled.
EnabledFloppy A & B will be swapped under DOS
DisabledFloppy A & B will be normal definition
During POST, BIOS will determine if the floppy disk drive installed is 40
or 80 tracks. 360 type is 40 tracks while 720, 1.2 and 1.44 are all
80 tracks. The default value is Enabled.
EnabledBIOS searches for floppy disk drive to determine if it
is 40 or 80 tracks, Note that BIOS cannot tell from 720
, 1.2 or 1.44 drive type as they are all 80 tracks
DisabledBIOS 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 360
Boot Up NumLock Status
The default value is On
OnKeypad is number keys
OffKeypad is arrow keys
IDE HDD Block Mode
The default value is Disabled.
EnabledEnable IDE HDD Block Mode
DisabledDisable IDE HDD Block Mode
Turbo SW Function Enable
The default value is Yes
YesChange system speed by Turbo SW immediately when system
boot up.
NoChange system speed by keyboard immediately when system
boot up.
Video BIOS Shadow
It determines whether video BIOS will be copied to RAM, however, it is
optional from chipset design. Video Shadow will increase the video speed.
The default value is Enabled.
Please set all your PCI card using INTA# as possible.
B:
Select "PCI/Green Function setup" in CMOS SETUP.
C:
According to which PCI slot installed with the PCI card, you can
select your referencial settings.
For example: PCI CARD in slot1 using INTA.
Then you have to set item 1:
SLOT1 using INT#: "A-PIRQ1" and set item 6:
PIRQ1# connected IRQ: "5, 7, 9, 10, 11, 12, 14, 15"
PCI IDE has to be set to 14
PCI SCSI can be set to 9, 10, 11, 12
D:
GA-107 / 108 only can be installed in PCI SLOT2, so please set
item 2 SLOT2 using INT#:"D-PIRQ1" and set item 6 PIRQ1# connected
IRQ14 by single.
E:
Please always set ITEM 6~9 by single. If you don't have two or
more PCI cards using the same PIRQ1, PIRQ2 , PIRQ3 or PIRQ4.
PIRQ1# connected IRQ:" " by single
PIRQ2# connected IRQ:" " by single
PIRQ3# connected IRQ:" " by single
PIRQ4# connected IRQ:" " by single
F:
Some PCI display cards (For example: WD90C33, Trident 9420) can't
accept CPU to PCI Burst-write,so please disable CPU to PCI Burst-write
for those PCI display card in Chipset Features Setup.
G:
Some PCI display cards would conflict with some PCI Matser card.
For example:
Intel S3928 with NCR 810
Intel S3928 with Adaptec 2940
WD90C33 with Adaptec 2940
Intel S3928 with BusLogic BT 946
In these cases,please install Master Card (Adaptec 2940 or BusLogic
BT946) in PCI slot1 and install display card (Intel S3928 or WD90C33) in
PCI slot3, then short pin 2-3 of JP17 and open JP22.
When you select this function, the following message will appear at the center of the
screen to assist you in creating a password.
ROM PCI/ISA BIOS ( 2A4X5G01 )
CMOS SETUP UTILITY
AWARD SOFTWARE, INC.
STANDARD CMOS SETUP
BIOS FEATURES SETUP
CHIPSET FEATURES SETUP
POWER MANAGEMEN
PCI / GREEN FUNCTIO
LOAD SETUP DEFAULTS
ESC
: Quit
F10
: Save & Exit Setup(Shift)F2
Enter Password:
Change / Set / Disabled Password
PASSWORD SETTING
IDE HDD AUTO DETECTION
HDD LOWLEVEL FORMAT
SAVE & EXIT SETUP
EXIT WITHOUT SAVING
: Select Item
: Change Color
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 to 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.
System memory used by DOS and application
program.
Display buffer memory for VGA/
EGA/CGA/MONOCHROME adapter.
Reserved for I/O device BIOS ROM or RAM
buffer.
Reserved for PCI device ROM.
System BIOS ROM.
System extension memory.
INTERRUPT controller.(Master)
CHIPSET control registers I/O ports.
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
5.4INTERRUPT MAP
NMI:Parity check error
IRQ (H/W):System TIMER interrupt from TIMER-0
KEYBOARD output buffer full
Cascade for IRQ 8-15
SERIAL port 2
SERIAL port 1
PARALLEL port 2
FLOPPY DISK adapter
PARALLEL port 1
RTC clock
Available
Available
Available
Available
MATH coprocessor
HARD DISK adapter
Available
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.
CMOS BATTERY HAS FAILED
CMOS battery is no longer functional. It should be replaced.
CMOS CHECKSUM ERROR
Checksum of CMOS is incorrect. This can indicate that CMOS has been corrupted.
This error may have been caused by a weak battery. Check the battery and replace it
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>. 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.
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.
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.
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.
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.
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 is no floppy drive 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.
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.
Indicate an error verifying a value already written to memory. Use the location along
with your system 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 with 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 with problem has been isolated.
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.
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.
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.
ISA POST codes are typically output to port address 80h.
POSTNameDescription
C0Turn Off Chipset CacheOEM Specific-Cache control.
1Processor Test 1Processor 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.
2Processor Test 2Read/Write/Verify all CPU registers except SS, SP, and BP with
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.
4Test Memory Refresh
Toggle
5Blank video, Initialize
keyboard
6Reserved
7Test CMOS Interface
and Battery Status
BEChipset Default
Initialization
C1Memory presence testOEM Specific-Test to size on-board memory.
C5Early ShadowOEM Specific-Early Shadow enable for fast boot.
C6Cache presence testExternal cache size detection.
8Setup low memoryEarly chip set initialization.
9Early Cache
Initialization
ASetup Interrupt Vector
Table
BTest CMOS RAM
Checksum
CInitialize keyboardDetect type of keyboard controller (optional).
DInitialize Video
Interface
ETest Video MemoryTest video memory, write sign-on message to screen.
FTest DMA Controller 0BIOS checksum test.
10Test DMA Controller 1
11Test DMA Page
registers
12-13Reserved
RAM must be periodically refreshed in order to keep the memory
from decaying. This function assures that the memory refresh
function is working properly.
Keyboard controller initialization.
Verifies CMOS is working correctly, detects bad battery.
Program chipset registers with power on BIOS defaults.
Memory presence test.
OEM chip set routines.
Clear low 64 K of memory.
Test first 64 K memory.
Cyrix CPU initialization.
Cache initialization.
Initialize first 120 interrupt vectors with SPURIOUS_INT-HDLR
and initialize INT 00h-1Fh according to INT_TBL.
Test CMOS RAM Checksum, if bad, or insert key pressed, load
defaults.
Set NUM_LOCK status.
Detect CPU clock.
Read CMOS location 14h to find out type of video in use.
Detect and Initialize Video Adapter.
Setup shadow RAM - Enable shadow according to Setup.
Keyboard detect and initialization.
Test DMA Page Registers.
Serial/Parallel Ports
44Reserved
45Detect & Initialize Math
Coprocessor
46Reserved
47Reserved
48-4DReserved
4EManufacturing POST
Loop or Display
Messages
4FSecurity CheckAsk password security (optional).
50Write CMOSWrite all CMOS values back to RAM and clear screen.
51Pre-boot EnableEnable parity checker.
52Initialize Option ROMsInitialize any option ROMs present from C8000h to EFFFFh.
53Initialize Time ValueInitialize time value in 40h: BIOS area.
60Setup Virus ProtectSetup virus protect according to Setup
61Set Boot SpeedSet system speed for boot
62Setup NumLockSetup NumLock status according to Setup
63Boot AttemptSet low stack.
Turn off interrupts then verify no interrupt mask register is on.
Force an interrupt and verify the interrupt occurred.
Verify NMI can be cleared.
Size base memory from 256 K to 640 K extended memory above
1 MB.
Test base memory from 256 K to 640 K and extended memory
above 1 MB using various patterns.
This will be skipped in EISA mode and can be "skipped" with ESC
key in ISA mode.
Detect if mouse is present, initialize mouse, install interrupt
vectors.
Initialize floppy disk drive controller and any drives.
Initialize hard drive controller and any drives.
Initialize any serial and parallel ports (also game port).
Initialize math coprocessor.
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.
Enable NMI, Enable cache before boot.
When FSCAN option is enabled, will initialize from C8000h to
Purchase Date
Mainboard Data
Model No.GA-Rev. No.
Serial No.
System Configuration
CPU Type:
CPU Brand:
CPU Speed:
DRAM Type:12481632 MB
DRAM Speed:807060 ns
DRAM Total Size:MB
DRAM Brand:
SRAM Size:64 KB128 KB256 KB512 KB
SRAM Part No.TAG:DATA:
Video Card:
Video Chip or Brand:
Floppy Drive A Capacity & Brand:
Floppy Drive B Capacity & Brand:
Storage Controller TypeMFMRLLIDEESDISCSI
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: