PENTIUM
TX 400
Chapter1Chapter1
Chapter Chapter 11
IntroductionIntroduction
Overview
TX 400 green main board provides a highly integrated solution for fully
compatible, high performance PC/AT platforms and supports Intel Pentium,
Cyrix 6x86, M2 and AMD K5, K6 microprocessors. It features Write-Back
Secondary Cache memory for 256MB DRAMs, so as to give full play to the
advantages of the Pentium, Cyrix 6x86, M2 and AMD K5, K6 CPUs. The
main board offers a wide range of interfaces which supports integrated onboard IDE and on-board I/O functions.
The current Green function is compliant with ACPI specification and OS
Directed Power Management.
Key Features
CPU
Chipset
Main memory
"*": The maximum speed of Intel PCIset specification is 66MHz only,
it’s recommended by Intel not to set system clock frequency as
75MHz.
l Supports Intel Pentium 75, 90, 100, 120, 133, 150, 166, 180,
200, 233 MHz, Intel Pentium Processor with MMX
technology.
l Supports Cyrix 6x86 100MHz (P120 Plus), 110MHz (P133
Plus), 120MHz (P150 Plus), 133MHz (P166 Plus), 150MHz
(P200 Plus)*, 6x86L and M2 CPUs.
l Supports AMD K5 PR75, PR90, PR100, PR120, PR133,
PR166 and K6 PR166, PR200, PR233 CPUs.
l Switching regulator (2.0~3.5V circuit) on board.
l Intel’s 82439 TX, PIIX4, 324 Pin BGA package chipset.
l Supports 4x72pin SIMM modules and 2x168 pin DIMM
modules.
l 64-bit data path for flexible memory size expands from 8MB
up to 256MB DRAMs for SIMM socket.
l Supports Fast Page mode DRAM and EDO DRAM for SIMM
socket.
l Supports from 8MB to 64MB 3.3V/unbuffered SDRAM
DIMM or 3.3V/unbuffered EDO DIMM for DIMM slot.
1--11
Chapter 2
Chapter 2
Jumper Configuration
The mainboard offers a set of jumper settings to facilitate clock frequency
adjustments and other important selections.
System Clock Selection
In this TX Baby AT mainboard, there are five selections of SC (System Clock).
Users have to set a group of jumpers as shown in the following illustration to
determine which system clock is used.
System Clock 50MHz:
JS3
JS2
JS1
System Clock 55MHz:
JS3 JC2 JS3
JS2 JC1 JS2
JS1 JS1
CPU
System Clock 60MHz :
JS3
JS2
JS1
System Clock 75MHz: System Clock 66MHz :
JS3 JS3
JS2 JS2
JS1 JS1
Clock Multiplier Selection
2-1
Chapter 3
Chapter 3
Connector Configuration
This section lists all connector pin assignments and port descriptions on the
mainboard. The situations of the connectors and ports are illustrated in the
following figures. Before inserting these connectors, take note of their
directions.
Power Connector ( J3 )
PIN NUMBER FUNCTION J3
1 POWER GOOD
2 +5V
3 +12V
4 -12V
5 GND
6 GND
7 GND
8 GND
9 -5V
10 +5V
11 +5V
12 +5V
CPU
Keyboard Connector ( JP3 )
PIN NUMBER FUNCTION
1 CLOCK
2 DATA
3 AC
4 GND
5 +5V
JP3
3 - 1
Chapter 4
Chapter 4
AWARD BIOS
Description
Entering BIOS Setup
Power on the computer, when the following message appears briefly
at the bottom of the screen during the POST (Power On Self Test),
press <Del> key or simultaneously press <Ctrl> + <Alt> + <Esc>
keys.
Press <Del> to enter SETUP
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 twelve setup functions and two exit choices. Use the
arrow keys to select from among the items and press <Enter> to
accept or enter the sub-menu.
ROM PCI/ISA BIOS (2A59IQ1F)
CMOS SETUP UTILITY
AWARD SOFTWARE, INC.
STANDARD CMOS SETUP INTEGRATED PERIPHERALS
BIOS FEATURES SETUP PASSWORD SETTING
CHIPSET FEATURES SETUP IDE HDD AUTO DETECTION
POWER MANAGEMENT SETUP SAVE & EXIT SETUP
PNP/PCI CONFIGURATION EXIT WITHOUT SAVING
LOAD SETUP DEFAULTS
Esc : Quit
F10 : Save & Exit Setup ( Shift) F2 : Change Color
Time, Date, Hard Disk Type ...
Figure-1 Main Menu For BIOS Setup
↑ ↓ → ← : Select Item
4 - 1
Appendix
Appendix A.
BIOS Upgrade Diskette
Use this diskette to update your BIOS when necessary.
For the most updated and additional information about BIOS upgrades,
please refer to the "README" in the "BIOS Upgrade Diskette".
MWarning: Before you update your BIOS, review
the "README" file to avoid making mistakes.
Appendix B.
5-1
þþ Notice
The information in this document is subject to change in order to improve
reliability, design, or function without prior notice and does not represent a
commitment on the part of this company. In no event will we be liable for
direct, indirect, special, incidental, or consequential damages arising out of
the use or the possibility of such damages.
All trademarks are the property of their respective owners.
If you need any further information, please visit our web-site:
“www.qdigrp.com”.
IntroductionIntroduction
Cache memory
On-board IDE
l Provides 512KB L2 Pipeline Burst Cache on board.
l Supports 2 PCI Bus Master (Bus Master works as DMA
Mode 2 type) IDE ports.
l Supports PIO mode up to Mode 4 Timing.
l Supports “Ultra DMA/33” synchronous DMA mode transfers
up to 33MB/sec.
l Supports 2 Fast IDE interfaces for up to 4 IDE devices e.g.
IDE hard disks and CD ROMs drives.
Green function
CPU Overheat
Protection
l Supports 3 green modes: Doze, Standby and Suspend
l Power LED will blink when system is in the green status.
l When CPU fan malfunctions, the system will deactivate the
CPU Clock line to decrease CPU utilization to the speed upon
detection of system been overheated and the speaker alarms to
inform users. This will prevent CPU being damaged from
overheat.
On-board I/O l 3 x ISA Slots and 4 x PCI Slots.
l Uses NS Plug & Play IO chip Win 977.
l Supports up to two 3.5" or 5.25" floppy drives
360K/720K/1.2M/1.44M/2.88M format.
l Supports 120MB floppy drive.
l All I/O ports can be enabled or disabled in BIOS.
l Two high speed 16550 compatible UARTS
(COM1/COM2/COM3/COM4 selective) with 16-byte
send/receive FIFOs and support MIDI mode.
l One parallel port at I/O address 378H/278H/3BCH with
additional bi-direction I/O capability and multi-mode selection
(SPP/EPP/ECP) (IEEE1284 compliant).
l Provides protection circuit to prevent damages to the parallel
port when a connected printer is powered up or operated at a
higher voltage.
l Supports PS/2 mouse and PS/2 keyboard (optional).
l Supports IrDA TX/RX Header.
l Supports USB (Universal Serial Bus ) in specification.
BIOS l Licensed advanced AWARD BIOS. Supports Flash ROM
BIOS, Plug and Play ready, DMI ready. Built-in NCR810
SCSI BIOS.
Power supply
Board size
l Baby AT.
l 220mm x 250mm.
1--22
Jumper Configuration
The Intel Pentium CPU multiple clock settings are as shown below:
** Note: SC -- System Clock
1.5× SC 2× SC
JC2 JC2
JC1 JC1
CPU
JS3 JC2 JC2 JC2
JS2 JC1 JC1 JC1
JS1
or 3.5×SC
2.5× SC 3× SC
*Remark: 3.5× SC is only for 233MHz Pentium MMX CPU & K6 CPU.
CPU Frequency Selection
According to the CPU’s specification, set the system clock and clock multiplier
carefully. The following illustrations list all jumper settings for the major types
of CPUs.
For Intel Pentium 75~233MHz
75=1.5 × 50MHz: 90=1.5 × 60MHz: 100=1.5 × 66MHz:
JS3 JS3 JS3
JS2 JS2 JS2
JS1 JS1 JS1
JC2 JC2 JC2
JC1 JC1 JC1
120=2 × 60MHz: 133=2 × 66MHz: 150=2.5 × 60MHz:
2-2
Connector Configuration
Keylock Connector ( JP9 )
PIN NUMBER FUNCTION
1 +5V
2 NC
3 GND
4 KEYLOCK
5 GND
Hard Disk LED Connector ( JP12 )
PIN NUMBER FUNCTION
1 VCC
2 IDE ACT
3 IDE ACT
4 VCC
3 - 2
CPU
KB-LOCK (JP 9)
HD-LED (JP12)
T-LED (JP21)
SPEAKER (JP16)
IR HEADER(JP17)
AWARD BIOS Description
Standard CMOS Setup
Use the arrow keys to highlight the item, then use the < PgUp> or
<PgDn> keys to select the value you want in each item.
Date(mm:dd:yy): Thu, Mar 6, 1997
Time(hh:mm:ss): 00:00:00
HARD DISKS TYPE SIZE CYLS HEAD PRECOMP LANDZ SECTOR
MODE
Primary Master : Auto 0 0 0 0 0 0
AUTO
Primary Slave : Auto 0 0 0 0 0 0
AUTO
Secondary Master: Auto 0 0 0 0 0 0
AUTO
Secondary Slave : Auto 0 0 0 0 0 0
AUTO
Drive A : 1.44M, 3.5 in. Base Memory : 640 K
Drive B : None Extended Memory : 7168K
Video : EGA/VGA Total Memory : 8192K
Halt On : All Errors
ESC : Quit ↑ ↓ → ← : Select Item PU/PD/+/- : Modify
F1 : Help (Shift)F2 : Change Color
Other Memory : 384 K
Figure-2 Standard CMOS Setup Menu
Hard Disk
Primary Master/Primary Slave/Secondary Master/Secondary Slave
The categories identify the types of 2 channels that have been installed in
the computer. There are 45 predefined types and 4 user definable types
that are used for Enhanced IDE BIOS. Type 1 to Type 45 are predefined.
Type “User” is user-definable. If your hard disk drive type does not match
with the drive table or listed in it, you can use Type “User” to define your
own drive type manually.
4 - 2
Appendix
Introducing AMD-K5 CPU markings:
Operating Voltage:
B= 3.45V ~ 3.60V -- >3.5V
C= 3.30V ~ 3.465V -- > 3.3V
F = 3.135V ~ 3.465V -- > 3.3V
G = x/y
H= 2.86V~3.00V/3.30V~3.465V -- > 2.9/3.3
J = 2.57V~2.84V/3.30V~3.465V -- > 2.7/3.3
K= 2.38V~2.63V/3.30V~3.465V -- > 2.5/3.3
Processor Name
P-Rating
75,90,100,120,
133,150,166
AMD-K5
Internal CPU 1996 AMD
Frequency
75MHz, 90 MHz, Case Temperature:
100 MHz,105 MHz, W = 55°C
116.7 MHz R = 70°C
PR133
AMD-K5-PR133ABQ
100MHz
E J607070 ES
TM
Q = 60°C Y = 75°C
X = 65°C Z = 85°C
Appendix C.
Introducing AMD-K6 CPU markings:
5 - 2
Package Type
A=SPGA
Jumper Quick Setting Jumper Quick Setting ..........................1,2
ΠIntroductionIntroduction
Overview .............................. 1-1
Key Features .............................. 1-1
• Jumper ConfigurationJumper Configuration
System Clock Selection .............................. 2-1
Clock Multiplier Selection .............................. 2-2
CPU Frequency Selection
.............................. 2-2
CPU Type & Voltage Selection .............................. 2-8
Clear CMOS .............................. 2-9
Memory Configuration .............................. 2-9
Ž Connector ConfigurationConnector Configuration
Power Connector
............................... 3-1
Standby Power Connector
............................... 3-1
Power Switch ............................... 3-2
Keyboard Connector ............................... 3-2
Hard Disk LED Connector ............................... 3-2
Keylock Connector ............................... 3-3
Speaker Connector ............................... 3-3
IrDA Connector ............................... 3-3
Turbo LED Connector ............................... 3-3
USB1/USB2 Connector ............................... 3-4
FAN Connector ............................... 3-4
Hardware Green ............................... 3-4
Reset Switch ............................... 3-4
PS2 Mouse ............................... 3-5
I/O Port Description ............................... 3-5
Illustration of Connectors on board............................... 3-6
Chapter 2
JS3 JS3 JS3
JS2 JS2 JS2
JS1 JS1 JS1
JC2 JC2 JC2
JC1 JC1 JC1
166=2.5× 66MHz: 180=3× 60MHz: 200=3× 66MHz:
JS3 JS3 JS3
JS2 JS2 JS2
JS1 JS1 JS1
JC2 JC2 JC2
JC1 JC1 JC1
233=3.5 × 66MHz:
JS3
JS2
JS1
JC2
JC1
*Remark: 3.5× SC is only for Pentium MMX CPU.
For Cyrix 6× 86 CPU
2-3
Speaker Connector ( JP16 )
PIN NUMBER FUNCTION
1 SPKDATA
2 NC
3 GND
4 VCC
IrDA Connector ( JP17 )
PIN NUMBER FUNCTION
1 VCC
2 NC
3 IRRX
4 GND
5 IRTX
6 VCC
Turbo LED Connector ( JP21 )
Chapter 3
PIN NUMBER FUNCTION
1 GND
2 VCC
3 - 3
Chapter 4
If you select Type “Auto”, BIOS will Auto-Detect the HDD & CD-ROM
drive at the POST stage and show the IDE for HDD & CD-ROM drive.
If you select Type “User”, related information is asked to be entered into
the following items. Enter the information directly from the keyboard and
press <Enter>:
If an additional ESDI HDD Controller interface is ESDI, on-chip Primary
and/or Secondary has to be disabled. If the controller of HDD interface is
SCSI, the type should be set as “Auto” whatever the HDD interfaces is.
CYLS number of cylinders HEAD number of heads
PRECOMP write precom LANDZ landing zone
SECTOR number of sectors MODE HDD access mode
Video
This category selects the type of video adapter used for the primary
system monitor. Although secondary monitors are supported, you do
not have to select the type in Setup.
EGA/ VGA Enhanced Graphics Adapter / Video Graphic Array. For
CGA 40 Color Graphic Adapter, powering up in 40 column mode.
CGA 80 Color Graphic Adapter, powering up in 80 column mode.
MONO Monochrome adapter, including high resolution monochrome
EGA, VGA, SEGA, SVGA, or PGA monitor adapters.
adapters.
Error Halt
This category determines whether the computer will stop or not if an
error is detected during powering up.
No errors The system boot will not stop for any error that may
All errors Whenever the BIOS detects a non-fatal error, the
All, But Keyboard The system boot will not stop for a keyboard error,
All, But Diskette The system boot will not stop for a disk error; but it
All, But Disk/Key The system boot will not stop for a keyboard or disk
be detected.
system will stop and you will be prompted.
but it will stop for all the other errors.
will stop for all the other errors.
error, but it will stop for all the other errors.
Memory
This category display-only what is determined by POST (Power On
Self Test) in the BIOS.
4 - 3
Processor Name
Appendix
Internal CPU Frequency
166MHz, 200MHz, 233MHz
AMD-K6
AMD-K6-PR200
2.9V
xxxxxxxx
m c 1996 AMD
TM
Center of Core
Voltage:
2.9V, 3.2V
(For dual voltage)
Appendix D.
Introducing Cyrix 6x86 CPU markings:
5-3
• AAWARD BBIOS D Descriptionescription
Entering BIOS Setup ............................. 4-1
Standard CMOS Setup ............................. 4-2
BIOS Features Setup ............................. 4-4
Chipset Features Setup ............................. 4-7
Power Management Setup ............................. 4-9
PNP/PCI Configuration ............................. 4-12
Load Setup Defaults ............................. 4-13
Integrated Peripherals ............................. 4-14
Password Setting ............................. 4-15
IDE HDD Auto Detection
............................. 4-16
Power-On Boot ............................. 4-18
• AppendixAppendix
Appendix A. BIOS Upgrade Diskette............................. 5-1
Appendix B. AMD-K5 CPU MARK............................. 5-2
Appendix C. AMD-K6 CPU MARK............................. 5-3
Appendix D. Cyrix 6x86 CPU MARK............................. 5-4
Appendix E. Cyrix 6x86MX CPU MARK....................... 5-5
Jumper Configuration
P120+(100MHz)=50MHz × 2: P133+(110MHz)= 55MHz × 2:
JS3 JS3
JS2 JS2
JS1 JS1
JC2 JC2
JC1 JC1
P150+(120MHz)=60MHz × 2: P166+(133MHz)= 66MHz × 2:
JS3 JS3
JS2 JS2
JS1 JS1
JC2 JC2
JC1 JC1
P200+(150MHz)= 75MHz × 2:
JS3
JS2
JS1
JC2
JC1
** Note:
The maximum speed of Intel PCIset specification is 66MHz only,
it’s recommended by Intel not to set system clock frequency
at 75MHz.
For Cyrix 6× 86MX CPU
MX-PR166(150MHz)= 60MHz × 2.5:
JS3
2-4
Connector Configuration
USB1/USB2 Connector ( USB1/USB2 )
PIN NUMBER FUNCTION
1 VCC
2 Key
3 DATA 4 DATA +
5 GND
FAN Connector ( JP7 )
PIN NUMBER FUNCTION
1 GND
2 +12V
3 GND
Hardware Green ( JP8 )
SETTING FUNCTION
CLOSE HARDWARE GREEN (Close once)
OPEN NORMAL
Reset Switch ( JP10 )
SETTING FUNCTION
CLOSE ONCE RESET THE SYSTEM
OPEN NORMAL
PS2 Mouse (JP1) FAN POWER (JP7)
USB1
USB2
3 - 4
HD SMI (JP8)
CPU
RESET (JP10)
AWARD BIOS Description
Base Memory The POST in the BIOS will determine the amount
Extended Memory The BIOS determines how much extended memory
Other Memory This is the memory that can be used for different
Total Memory Total memory of the system is the sum of the
of base (or conventional) memory installed in the
system.
is present during the POST.
applications. Shadow RAM is mostly use in this
area.
above memory.
BIOS Features Setup
ROM PCI/ISA BIOS (2A59IQ1F)
BIOS FEATURES SETUP
AWARD SOFTWARE, INC.
Virus Warning : Disabled Video BIOS Shadow : Enabled
CPU Internal Cache : Enabled C8000~CBFFF Shadow : Disabled
External Cache : Enabled CC000~CFFFF Shadow : Disabled
Quick Power On Self Test : Enabled D0000~D3FFF Shadow : Disabled
Boot Sequence : A,C,
SCSI
Swap Floppy Drive : Disabled D8000~DBFFF Shadow : Disabled
Boot Up Floppy Seek : Disabled DC000~DFFFF Shadow : Disabled
Boot Up Numlock Status : On Delay for HDD (Secs) : 0
Typematic Rate Setting : Disabled
Typematic Rate (Chars/Sec) : 6
Typematic Delay(Msec) : 250
Security Option : Setup
PCI/VGA Palette Snoop : Disabled F1 : Help PU/PD/+/- : Modify
OS Select For DRAM>64MB : Non-OS2 F5 : Old Values (Shift)F2: Color
Report No FDD For WIN95 : Yes F7 : Load Setup Defaults
D4000~D7FFF Shadow : Disabled
ESC: Quit ↑↓→← : Select Item
Figure-3 BIOS Features Setup
The following pages indicate the options of each item and describe their
meaning.
Item Option Description
• Virus Warning
Enabled Activates automatically when the system
Disabled
boots up causing a warning message to
appear when anything attempts to access the
boot sector or hard disk partition table.
No warning message appears when anything
4 - 4
Appendix
P-Rating
Processor name 90+, 120+, 133+
6x86, 6x86L 150+, 166+, 200+
6x86-P133+GP 133, 150
110MHz
3.52V (028 )
Center of Core
Voltage:
3.3V, 3.52V
(For single voltage)
2.8V, 2.9V
(For dual voltage)
CPU Voltage:
Full spec.: 3.15V~3.70V
C-spec. (016): 3.15V~3.45V-- >3.3V
C-spec. (028): 3.40V~3.70V -- >3.5V
CPU Core
Frequency
100, 110, 120,
Appendix E.
Introducing Cyrix 6x86MX CPU markings:
5 - 4
Jumper Quick SettingJumper Quick Setting
CPU Installation
JS1, JS2 and JS3 are used for System Clock settings.
JC1and JC2are used for CPU multiple clock settings.
(Please refer to pages 2-1 ~ 2-7 for detailed information)
CPU Frequency JC1 JC2 JS1 JS2 JS3
75MHz 2-3 2-3 1-2 1-2 1-2
90 MHz 2-3 2-3 1-2 2-3 2-3
Intel
Pentium
(P54C &
P55C)
Cyrix
6x86
Cyrix
6x86MX
AMD
K5
AMD
K6
100 MHz 2-3 2-3 2-3 2-3 2-3
120 MHz 1-2 2-3 1-2 2-3 2-3
133 MHz 1-2 2-3 2-3 2-3 2-3
150 MHz 1-2 1-2 1-2 2-3 2-3
166 MHz 1-2 1-2 2-3 2-3 2-3
180 MHz 2-3 1-2 1-2 2-3 2-3
200 MHz 2-3 1-2 2-3 2-3 2-3
233 MHz 2-3 2-3 2-3 2-3 2-3
P120+(100 MHz) 1-2 2-3 1-2 1-2 1-2
P133+(110 MHz) 1-2 2-3 1-2 1-2 2-3
P150+(120 MHz) 1-2 2-3 1-2 2-3 2-3
P166+(133 MHz) 1-2 2-3 2-3 2-3 2-3
P200+(150 MHz) 1-2 2-3 2-3 1-2 2-3
PR166(150 MHz) 1-2 1-2 1-2 2-3 2-3
PR200(150 MHz) 1-2 2-3 2-3 1-2 2-3
PR200(166 MHz) 1-2 1-2 2-3 2-3 2-3
PR233(188MHz) 1-2 1-2 2-3 1-2 2-3
PR233(200MHz) 2-3 1-2 2-3 2-3 2-3
PR75(75 MHz) 2-3 2-3 1-2 1-2 1-2
PR90,PR120(90 MHz) 2-3 2-3 1-2 2-3 2-3
PR100,PR133(100 MHz) 2-3 2-3 2-3 2-3 2-3
PR166 1-2 1-2 2-3 2-3 2-3
PR200 2-3 1-2 2-3 2-3 2-3
166(166 MHz) 1-2 1-2 2-3 2-3 2-3
200(200 MHz) 2-3 1-2 2-3 2-3 2-3
233(233 MHz) 2-3 2-3 2-3 2-3 2-3
Select CPU Type & Voltage
JV, JV2, JV3, JV4 and JV5 are used to select your CPU voltage.
(Please refer to pages 2-8 for details.)
Single Voltage CPU Dual Voltage CPU
JS2
JS1
Chapter 2
JC2
JC1
MX-PR200(150MHz)= 75MHz × 2:
JS3
JS2
JS1
JC2
JC1
MX-PR200(166MHz)= 66MHz × 2.5:
JS3
JS2
JS1
JC2
JC1
MX-PR233(188MHz)= 75MHz × 2.5:
JS3
JS2
JS1
JC2
JC1
MX-PR233(200MHz)= 66MHz × 3:
JS3
JS2
JS1
For AMD K5 CPU
JC1
JC2
2-5
Chapter 3
PS2 Mouse ( JP1 )
PIN NUMBER FUNCTION
1 DATA
2 CLOCK
3 GND
4 NC
5 +5V
** Note: If you choose to use PS/2 Mouse, please contact your
vendor for an optional PS/2 Mouse cable.
I/O Port Description
CONNECTOR FUNCTION
IDE1 Primary IDE Port
IDE2 Secondary IDE Port
FLOPPY Floppy Drive Port
PRINTER Parallel Port
CN2 COM1/COM2/COM3/COM4
CN3 COM2/COM3/COM4/COM1
3 - 5
Chapter 4
attempts to access the boot sector or hard
disk partition table.
**Note: This function is available only
for DOS and other OSes that do not trap
• CPU Internal
Cache
• External
Cache
• Quick Power
On Self Test
• Boot Sequence
• Swap Floppy
Drive
• Boot Up Floppy
Seek
• Boot Up
Numlock Status Off Keypad is used as arrow keys.
•Typematic Rate
Setting
• Typematic Rate
Chars/Sec)
• Typematic
Delay (Msec)
• Security Option
Enabled
Disabled
Enabled
Disabled
Enabled Enables quick POST. BIOS will shorten or
Disabled Normal POST.
C, CD-ROM,A
... SCSI, C ,A
Enabled Exchanges the assignment of A&B floppy
Disabled The assignment of A&B floppy drives are
Enabled BIOS searches for floppy disk drive to
Disabled SkipS drive seeking to speed up system
On Keypad is used as number keys.
Enabled EnableS typematic rate and typematic delay
Disabled DisableS typematic rate and typematic delay
6~30 Sets the speed of the typematic rate
250 ~ 1000 Set the time of the typematic delay.
System The system will not boot and access to Setup
Setup The system will boot up, but access to Setup
INT13.
Enables CPU internal cache.
Disables CPU internal cache.
Enables external cache.
Disables external cache.
skip some check items during POST to speed
up POST after you power on the computer.
Any search sequence can be choosen for
bootup.
drives.
normal.
determine if drive is ready for diskette
read/write during booting.
booting.
programming.
programming. The system BIOS will use the
default value of these two items.
(characters per second).
will be denied if the correct password is not
entered when prompted.
will be denied if the correct password is not
entered when prompting.
**Note: To disable security, select
Password Setting in Main Menu, you will
4 - 5
Appendix
PROCESSORPROCESSOR
FAN/HEATSINK REQUIRED
686
M X
Name of processor:
6x86 MX
Core Voltage: 2.9V
Cyrix
X
6x86MX-PR200
66MHZ Bus 2.5X
2.9v
CPU PR Rating:
PR200
CPU Core Frequency:
66MHz×2.5
®
TM
5-5
Voltage I/O Voltage Core Voltage
JV1 Close Open Close Open
JV2 Open Close Open
JV3 Close Open Open Close
JV4 Close Close
JV5 2-3 1-2
3.3V 3.5V 3.3V 2.8V 2.9V 3.2V
Clear CMOS
JP6 Close Open
CLEAR CMOS NORMAL
** Note: Power down the AC Supply (110/220V) when wanting
to clear CMOS.
Jumper Configuration
PR75 (75MHz) = 50MHz × 1.5:
JS3
JS2
JS1
JC2
JC1
PR90, PR120 (90MHz) = 60MHz × 1.5:
JS3
JS2
JS1
JC2
JC1
PR100, PR133 (100MHz) = 66MHz × 1.5:
JS3
JS2
JS1
JC2
JC1
PR166 = 66MHz × 2.5:
JS3
JS2
JS1
PR200 = 66MHz × 3:
For AMD K6 CPU
K6 - 166 (166MHz) = 66MHz × 2.5:
JS3
2-6
JC2
JC1
JS3
JS2
JS1
JC2
JC1
Connector Configuration
Illustration of Connectors on board
3 - 6
AWARD BIOS Description
be asked to enter the password. Do not
type anything, just press <Enter>, it will
disable security. Once the security is
disabled, the system will boot and you are
able to enter Setup freely.
• PCI/VGA
Palette Snoop Disabled Disables PCI/VGA palette snoop.
• OS Select For
DRAM>64MB
• Report No FDD
For WIN95
• Video BIOS
Shadow
• C8000~CBFFF
Shadow ...
DC000-DFFFF
Shadow:
• Delay For HDD
(Secs)
Enabled Enables PCI/VGA palette snoop.
Non-OS2 If your operating system is not OS/2, please
OS2 If system DRAM is more than 64MB and
Yes
No
Enabled Video BIOS will be copied to RAM. Video
Disabled Video shadow is disabled.
Enabled
Disabled
0 ~ 15
select this item.
operating system is OS/2, please select this
item.
Releases IRQ6 to WIN95 if no FDD are in
the connection.
Does not release IRQ6 to WIN95.
Shadow will increase the video speed.
Optional ROM will be copied to RAM by
16K bytes per unit.
The shadow function is disabled.
This item allows you to set additional delay
time (0~15seconds) for HDD detection. If
you encounter any HDD detection problems,
delay time can be added.
4 - 6
Appendix
5 - 6
P/N: 430-01011-211
Manual TX 400 Ver 1.1
JS2
JS1
Chapter 2
JC2
JC1
K6 - 200 (200MHz) = 66MHz × 3:
JS3
JS2
JS1
JC2
JC1
K6 - 233 (233MHz) = 66MHz × 3.5:
JS3
JS2
JS1
JC2
JC1
CPU Type & Voltage Selection
2-7
Chapter 4
Chipset Features Setup
ROM PCI/ISA BIOS (2A59IQ1F)
CHIPSET FEATURES SETUP
AWARD SOFTWARE, INC.
Auto Configuration :Enabled Pipeline Cache Timing : Faster
DRAM Timing :60ns Chipset NA# Asserted :Enabled
DRAM Lead off Timing :10/6/3 DRAM Refresh Rate :15.6us
DRAM Read Burst (EDO/FP) :x444/x444
DRAM Write Burst Timing :x222
Fast EDO Leadoff :Disabled
Refresh RAS# Assertion :4 Clks
Fast RAS To CAS Delay :3
DRAM Page Idle Timer :2 Clks
DRAM Enhanced Paging :Enabled
Fast MA to RAS# Delay :2 Clks
SDRAM(CAS Lat/RAS-to-CAS) :3/3
SDRAM Speculative Read :Disabled
System BIOS Cacheable :Disabled
Video BIOS Cacheable :Disabled
8 Bit I/O Recovery Time :2
16 Bit I/O Recovery Time :1 F1 : Help PU/PD/+/- : Modify
Memory Hole At 15M-16M :Disabled F5 : Old Values (Shift)F2: Color
PCI 2.1 Compliance :Enabled F7 : Load Setup Defaults
Mem Drive Str. (MA/RAS) :Auto
ESC : Quit ↑↓→← : Select Item
Figure-4 Chipset Features Setup Menu
The following pages indicates the options of each item and describe their
meaning.
Item Option Description
• Auto Configuration
Enabled Enables auto configuration of DRAM timing
Disabled Manually set DRAM timing.
4 - 7
Jumper Configuration
JV5
CPU
JV1JV2JV3JV4
For single voltage CPU (Intel Pentium Processor):
3.3V Voltage 3.5V Voltage
JV1JV2JV3JV4 JV5 JV1JV2JV3JV4 JV5
For dual voltage CPU (Pentium Processor with MMXTM Technology):
I/O voltage selection:
Core voltage selection:
2.8V core voltage 2.9V core voltage 3.2V core voltage
JV1JV2JV3JV4 JV1JV2JV3JV4 JV1JV2JV3JV4
3.3V I/O voltage
JV5
Clear CMOS
2-8
AWARD BIOS Description
M
Warning: Do not set DRAM timing too
fast this may affect the stability of your system.
• DRAM Timing
• DRAM Leadoff
Timing... Fast MA
to RAS# Delay
• SDRAM (CAS
Lat/RAS-to-CAS) &
SDRAM
Speculative Read
• System BIOS
Cacheable
• Video BIOS
Cacheable
• 8 Bit I/ O
Recovery Time
• 16 Bit I / O
Recovery Time
• Memory Hole At
15M-16M
• Pipeline Cache
Tim-Fastening
• Chipset NA#
Asserted
• Mem Drive Str.
(MA/RAS)
• DRAM Refresh
Rate
60ns,
70ns
Enabled Other than conventional memory, the system
Disabled The system BIOS area is not cacheable.
Enabled Other than conventional memory, video BIOS
Disabled Video BIOS area is not cacheable.
1∼ 4
NA 8 bit I/O recovery time does not exist.
1∼ 4
NA 16 bit I/O recovery time is not exist.
Enabled Memory Hole at 15-16M is reserved for
Disabled Do not set this memory hole
Fastest This item allows you to select two timing of
Enabled
Disabled
15.6us
31.2us
64.4us
125us
256us
Disabled
This item is of selected DRAM read/write timing.
You must ensure that your SIMMs are as fast as
60ns, otherwise you have to select 70ns.
These items are concerning DRAM Timing
configuration.
These items are concerning SDRAM Timing
configuration.
BIOS area is also cacheable.
area is also cacheable.
This is the ISA Bus 8 bit I/O operating recovery
time.
This is the ISA Bus 16 bit I/O operating recovery
time.
expanded PCI card.
pipeline cache, faster and fastest.
This item allows you to select between two
methods of chipset NA# asserted during CPU
with cycles/CPU line fills Enabled or Disabled.
This item allows you select memory drive Str. If
high loading SIMM RAM is used (the number of
memory chips exceed 64), select 16mA/16mA..
For SDRAM and/or EDO/FPM memory subsystem..
For EDO/FPM only memory sub-system
Refresh disabled
4 - 8
Normal
Chapter 2
CPU
Clear CMOS
close once
JP6
JP6
JP6
**Note: Power down the AC Supply (110/220V) when
wanting to clear CMOS.
"*" : Represents default jumper settings.
Memory Configuration
The TX Baby AT mainboard provides 4 SIMM slots and 2 DIMM slots for
providing a flexible memory size from 8MB up to 256MB main memory.
Please do not plug in two different brands of SIMMs on a bank simultaneously.
This mainboard supports 72-pin SIMM of 4MB, 8MB, 16MB, 32MB or 64MB.
The DRAM can be 60ns/70ns Fast Page mode of EDO DRAM. SIMMs must
be installed in pairs so that each bank contains two of the same size memory
modules. Two slots support 3.3V Synchronous DRAM (SDRAM) or 3.3V
unbuffered EDO DIMM of 8MB, 16MB, 32MB, 64MB.
DRAM
3.3V/unbuffered Synchronous
3.3V/unbuffered EDO DRAM
SIMM Bank 0
slots Fast Page Mode DRAM
Bank 1 EDO DRAM
If using DIMM together with SIMM, refer to the following table:
DIMM1 DIMM2 SIMM1 & 2 SIMM3 & 4
None Don’t care Single-row or Double
row SIMM
Single-row DIMM Don’t care Single-row SIMM Don’t care
Don’t care
2-9
Chapter 4
Power Management Setup
ROM PCI/ISA BIOS (2A59IQ1F)
POWER MANAGEMENT SETUP
AWARD SOFTWARE, INC.
Power Management :Disabled ** Reload Global Timer Events **
PM Control by APM :Yes IRQ [3-7, 9-15], NMI :Enabled
Video Off Method :V/H SYNC+Blank Primary IDE 0 :Disabled
Video Off After :N/A Primary IDE 1 :Disabled
Doze Mode :Disabled Secondary IDE 1 :Disabled
Standby Mode :Disabled Floppy Disk :Disabled
Suspend Mode :Disabled Serial Port :Enabled
HDD Power Down :Disabled Parallel Port :Disabled
Throttle Duty Cycle :62.5%
VGA Active Monitor :Disabled Thermal Duty Cycle :Disabled
IRQ 8 Clock Event :Disabled
Secondary IDE 0 :Disabled
CPU Warning Temperature :80ºC
ESC : Quit ↑↓→← : Select Item
F1 : Help PU/PD/+/- : Modify
F5 : Old Values (Shift)F2: Color
F7 : Load Setup Defaults
Figure-5 Power Management Setup Menu
The following pages indicates the options of each item and describe their
meaning.
Item Option Description
• Power
Management
• PM Control
by APM
Disabled
User Define
Min Saving Pre - defined timer values are used so that all
Max Saving Pre - defined timer values are used such that all
No System BIOS will ignore APM when Power
Yes System BIOS will wait for APM’s prompt before
Global Power Management (PM) will be
disabled.
Users can configure their own Power
Management Timer.
timers are in their MAX values
timers are in their MIN value
Management is enabled.
4 - 9
Jumper Configuration
Double-row DIMM Don’t care None Don’t care
If using DIMM or SIMM only, refer to the following table:
Total Memory SIMM1 & 2 SIMM3 & 4 DIMM1 DIMM2
8 MB 4 MB × 2 ---- ---- ----
---- ---- 8 MB ----
8 MB × 2 ---- ---- ----
16 MB 4 MB × 2 4 MB × 2 ---- ----
---- ---- 16 MB ----
---- ---- 8 MB 8 MB
24 MB 8 MB × 2 4 MB × 2 ---- ----
8 MB × 2 8 MB × 2 ---- ----
32 MB 16 MB × 2 ---- ---- ----
---- ---- 16 MB 16 MB
---- ---- 32 MB ----
48 MB 16 MB × 2 8 MB × 2 ---- ----
---- ---- 32 MB 16 MB
16 MB × 2 16 MB × 2 ---- ----
64 MB 32 MB × 2 ---- ---- ----
---- ---- 32MB 32MB
72 MB 32 MB × 2 4 MB × 2 ---- ---80 MB 32 MB × 2 8 MB × 2 ---- ---96 MB 32 MB × 2 16 MB × 2 ---- ----
128 MB 32 MB × 2 32 MB × 2 ---- ---256 MB 64 MB × 2 64 MB × 2 ---- ----
* Remark:
1. If DIMM1 and/or DIMM2 has 64MB or 128MB DIMMs with 64 bit
SDRAM cells, SIMM1, 2, 3 & 4 must be empty.
2. DRAM and SDRAM modules can be installed in a variety of configurations.
Please note that not all possible combinations of installation are
listed here.
2-10
AWARD BIOS Description
Wake Up Events In Doze & Suspend
it enters any PM mode e.g. Standby or Suspend.
**Note: If APM is installed (choose "Yes"), if
there is a task running, even the timer is set as
time out, the APM will not prompt the BIOS
to put the system into any power saving mode.
But if APM is not installed (choose "No"), this
option has no effect.
• Video Off
Method
• Video Off After
• Doze mode
• Standby
Mode
• Suspend
Mode
• HDD Power
Down
• Throttle Duty
Blank
Screen
V / H SYNC
+ Blank
DPMS This function is enabled only for the VGA card
The system BIOS will only blank off the screen
when disabling video.
In addition to Blank Screen, BIOS will also turn
off the V-SYNC & H - SYNC signals from VGA
cards to monitor.
supporting DPMS.
**Note:When the Green monitor detects the
V/H-SYNC signal, the electron gun will be
turned off.
N/A System BIOS will never turn off the screen.
Suspend Screen is off when the system is in Suspend
Standby Screen is off when the system is in Standby
Doze Screen is off when the system is in Doze mode.
Disabled The system will never enter Doze mode.
1Min ∼ 1 Hr
Disabled
1 Min ∼ 1Hr
Disabled
1 Min ∼ 1Hr
Disabled
1Min∼15
Min
Enabled Enables clock throttling.
mode.
mode.
Defines the continuous idle time before the
system enters Doze mode. If any item defined in
“
and activated, the system will be waken up.
The system will never enter Standby mode.
Defines the continuous idle time before the
system enters Standby mode. If any item defined
in “Wake Up Events In Doze & Suspend” is On
and activated, the system will be waken up.
The system will never enter Suspend mode.
Defines the continuous idle time before the
system enters Suspend mode. If any item defined
in “Wake Up Events In Suspend” is On and
activated, the system will be waken up.
HDD’s motor will not be off.
Defines the continuous HDD idle time before the
HDD entering power saving mode (motor off).
” is On
4 - 10
Chapter 4
Cycle Disabled Disables clock throttling.
• IRQ8 Clock
Event
• IRQ(3~7, 9~15),
NMI... Parallel
Port
• Thermal Duty
Cycle
• CPU Warning
Temperature
Enabled
Disabled
Enabled
Disabled
Disabled Disables thermal control function and speaker
25 % CPU speed will fall 25 percent when CPU is
50 % CPU speed will fall 50 percent when CPU is
75 % CPU speed will fall 75 percent when CPU is
65ºC Speaker alarms when CPU boundary temperature
70ºC Speaker alarms when CPU boundary temperature
75ºC Speaker alarms when CPU boundary temperature
80ºC Speaker alarms when CPU boundary temperature
Generates a clock event.
Does not generate a clock event.
Reloads global timer.
Does not influence global timer.
alarm function when CPU is overheated.
overheated.
overheated.
overheated.
is over 65ºC.
is over 70ºC.
is over 75ºC.
is over 80ºC.
4 - 11
AWARD BIOS Description
PNP/PCI Configuration Setup
ROM PCI/ISA BIOS (2A59IQ1F)
PNP/PCI CONFIGURATION SETUP
AWARD SOFTWARE, INC.
PNP OS Installed : No PCI IDE IRQ Map To : PCI-AUTO
Resources Controlled By : Manual Primary IDE INT# : A
Force Update ESCD : Disabled Secondary IDE INT# : B
IRQ-3 assigned to : Legacy ISA Used MEM base addr : N/A
IRQ-4 assigned to : Legacy ISA
IRQ-5 assigned to : PCI/ISA PnP
IRQ-7 assigned to : PCI/ISA PnP
IRQ-9 assigned to : PCI/ISA PnP
IRQ-10 assigned to : PCI/ISA PnP
IRQ-11 assigned to : PCI/ISA PnP
IRQ-12 assigned to : PCI/ISA PnP
IRQ-14 assigned to : Legacy ISA
IRQ-15 assigned to : Legacy ISA
DMA-0 assigned to : PCI/ISA PnP
DMA-1 assigned to : PCI/ISA PnP
DMA-3 assigned to : PCI/ISA PnP
DMA-4 assigned to : PCI/ISA PnP
DMA-5 assigned to : PCI/ISA PnP F1 : Help PU/PD/+/- : Modify
DMA-6 assigned to : PCI/ISA PnP F5 : Old Values (Shift)F2 : Color
DMA-7 assigned to : PCI/ISA PnP F7 : Load Setup Defaults
ESC: Quit ↑↓→← :Select Item
Figure-6 PNP/PCI Configuration Setup
The following pages indicates the options of each item and describe their
meaning.
Item Option Description
• Resources Controlled
By
• Force Updating ESCD
Manual Assigns system resources (IRQ and
DMA) manually by user.
Auto Assigns system resources (IRQ and
DMA) automatically by BIOS.
Enabled The system BIOS forces updating
ESCD once, then automatically sets
this item as Disable.
4 - 12
Chapter 4
Disabled Disable forces the update of ESCD
• IRQ-3 ∼ IRQ-15
assigned to
• DMA-0 ∼ DMA-7
assigned to
• PCI IDE IRQ Map
To
• Primary IDE INT# A ∼ D
• Secondary IDE INT# A ∼ D
Legacy ISA The specified IRQ-x will be assigned
PCI/ISA PnP The specified IRQ-x will be assigned
Legacy ISA The specified DMA-x will be
PCI/ISA PnP The specified DMA-x will be
PCI-AUTO The BIOS will scan for PCI IDE
PCI - SLOT5∼1
ISA The BIOS will not assign any IRQs
function.
to ISA only.
to ISA or PCI.
assigned to ISA only.
assigned to ISA or PCI.
devices and determine the location of
the PCI IDE device.
The BIOS will scan IRQ14 for primary
IDE INT# and IRQ15 for secondary
IDE INT# at the specified slot.
even if PCI IDE card is found,
because some IDE cards connects the
IRQ14&15 directly from ISA slot
through a card.
Indicates which INT# the PCI IDE card
uses for its interrupting the 1st IDE
channel.
Indicates which INT# the PCI IDE card
uses for its interrupting the 2nd IDE
channel.
Load Setup Defaults
The Setup Defaults settings are common and efficient.
4 - 13
AWARD BIOS Description
Integrated Peripherals
ROM PCI/ISA BIOS (2A59IQ1F)
INTEGRATED PERIPHERALS
AWARD SOFTWARE, INC.
IDE HDD Block Mode : Enabled
IDE Primary Master PIO : Auto
IDE Primary Slave PIO : Auto
IDE Secondary Master PIO : Auto Onboard Parallel Port : 378H/IRQ7
IDE Secondary Slave PIO : Auto Parallel Port Mode : SPP
IDE Primary Master UDMA : Auto
IDE Primary Slave UDMA : Auto
IDE Secondary Master UDMA : Auto
IDE Secondary Slave UDMA : Auto
On-Chip Primary PCI IDE : Enabled
On-Chip Secondary PCI IDE : Enabled
USB Keyboard Support : Disabled
Onboard FDC Controller : Enabled
Onboard Serial Port 1 : Auto F1 : Help PU/PD/+/-: Modify
Onboard Serial Port 2 : Auto F5 : Old Values (Shift) F2 : Color
Onboard IR Controller : Disabled F7 : Load Setup Defaults
Figure 7 Integrated Peripherals
ESC: Quit ↑↓→← : Select Item
The following pages indicates the options of each item and describe their
meaning.
Item Option Description
• IDE HDD Block
Mode
• IDE
Primary/Secondary
Master/Slave PIO
• On-chip
Primary/Secondary
PCI IDE
Enabled Allows IDE HDD to read/write several
Disabled IDE HDD only reads/writes a sector once.
Mode 0-4
Auto
Enabled
Disabled
sectors once.
Defines the IDE primary/secondary master/
slave PIO mode.
The IDE PIO mode is defined according to
auto - detect.
On-chip primary/secondary PCI IDE port is
enabled.
On-chip primary/secondary PCI IDE port is
4 - 14
Chapter 4
• Onboard FDC
Controller
• Onboard Serial Port
1/2
• Onboard IR controller
• Onboard Parallel Port
• Parallel Port mode
Enabled
Disabled
Auto
COM1/3F8,
COM2/2F8,
COM3/3E8,
COM4/2E8,
Disabled, Onboard serial port is disabled.
Disabled
Enabled
378/IRQ7,
3BC/IRQ7,
278/IRQ5,
378/IRQ5,
Disabled Onboard parallel port is disabled.
SPP
EPP1.7
EPP1.9
ECP
ECP+EPP
Password Setting
disabled.
Onboard floppy disk controller is enabled.
Onboard floppy disk controller is disabled.
Sets the address and interrupts the number
automatically.
Defines the onboard serial port address.
Disables onboard IR function.
Enables and configures IR mode.
Defines onboard parallel port address and
IRQ channel.
Defines the parallel port mode as Standard
Parallel Port (SPP), Enhanced Parallel Port
(EPP), or Extended Capabilities Port (ECP).
When selecting this function, the following message appears at the center
of the screen to assist you in creating a password.
ENTER PASSWORD
Type the password, up to eight characters, and press <Enter>. The
password typed now will clear any previously entered password from
CMOS memory. You will be asked to confirm the password. Type the
password again and press <Enter>.
To disable the password, 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 allowing you to enter Setup
freely.
4 - 15
AWARD BIOS Description
PASSWORD DISABLED
If you select “System” at “Security Option” of the “BIOS Features Setup”
Menu, you will be prompted for the password every time the system is
rebooted or any time you try to enter “CMOS Setup”.
If you select “Setup” at “Security Option” of the “BIOS Features Setup” Menu,
you will be prompted for the password only when you try to enter “CMOS
Setup”.
IDE HDD Auto Detection
The Enhanced IDE features are included in all Award BIOS. Below is a
brief description of these features.
ROM/PCI/ISA BIOS (2A59IQ1F)
IDE HDD AUTO DETECTION
AWARD SOFTWARE, INC.
HARD DISKS TYPE SIZE CYLS HEAD PRECOMP LANDZ SECTOR MODE
Primary Master:
Select Primary Master Option (N=Skip): N
Option Size Cyls Heads Precomp Landzone Sectors Mode
2(Y) 541 525 32 0 1049 67 LBA
1 541 1050 16 65535 1049 63 NORMAL
3 541 525 32 65536 1049 63 LARGE
Note: Some OSes (like SCO-UNIX) must use “NORMAL” for installation
Figure-9 IDE HDD Auto Detection
1. Setup Changes
With auto-detection
• BIOS setup will display all possible modes supported by the HDD
including NORMAL, LBA and LARGE.
• If HDD does not support LBA modes, no “LBA” option will be shown.
• If the number of physical cylinders are less than or equal to 1024,
“LARGE” option may not be shown.
4 - 16
• Users can select their appropriate mode.
With Standard CMOS Setup
Chapter 4
MODE ZONE
Drive C: User(516MB) 1120 16 65535 1119 59
Normal
Drive D: None(203MB) 684 16 65535 685 38 ------
---
When HDD is set as “user” type, the “MODE” option will be opened for
users to select their own HDD mode.
CYLS HEADS PRECOMP LAND SECTOR
2. HDD Modes
The Award BIOS supports 3 HDD modes: NORMAL, LBA and
LARGE,
also Auto detect.
NORMAL
Generic access mode in which neither the BIOS nor the IDE
controller will make any transformation during accessing. The
maximum number of cylinders, heads and sectors for NORMAL
mode are 1024,16 and 63.
If the user sets his HDD to NORMAL mode, the maximum accessible
HDD size will be 528 megabytes even though its physical size may be
greater than that.
LBA (Logical Block Addressing) mode
A new HDD accessing method to overcome the 528 Megabyte
bottleneck.
The number of cylinders, heads and sectors shown in setup may not
be the number physically contained in the HDD.
During HDD accessing, the IDE controller will transform the logical
address described by the sector, head and cylinder number into
its own physical address inside the HDD. The maximum HDD size
supported by LBA mode is 8.4 Gigabytes.
LARGE mode
Some IDE HDDs contain more than 1024 cylinder without LBA
support (in some cases, users do not want LBA). The Award BIOS
provides another alternative in supporting these kinds of HDD.
4 - 17
AWARD BIOS Description
BIOS tricks DOS (or other OS) so that the number of cylinders is less
than 1024 by dividing it by 2. At the same time, the number of heads are
multiplied by 2. A reverse transformation process will be made inside
INT13h in order to access the right HDD address.
Auto detect
If using Auto detect, the BIOS will automatically detect IDE hard
disk mode and set it to one kind of HDD modes.
3. Remark
To support LBA or LARGE mode of HDDs, there must be some
software involved which are located in Award HDD Service Routine
(INT13h). It may fail to access a HDD with LBA (LARGE) mode
selected if you are running under an Operating System which
replaces the whole INT 13h.
Power - On Boot
If you have made all the changes to the CMOS values and the system
can not boot with the CMOS values selected in Setup, restart the
system by turning it OFF then ON or by pressing the “RESET”
button on the system case. You may also restart the system by
simultaneously pressing the < Ctrl >, < Alt > and < Del > keys.
4 - 18
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