EPOX EP-5BTXA-E User manual

TRADEMARK
All products and company names are
trademarks or registered trademarks of
their respective holders.
The specification is subject to change without notice.
EP-5BTXA-E
ISA PCI MainBoard
with Onboard PCI IDE and Super Multi-I/O.
82430TX PCIset
V011

Package Checklist
Please make sure your package containg all items listed below before
your installation. If you find any damaged items or missing items,
please contact your retailer.
One IDE ribbon cable
One floppy ribbon cable
One manual
One Mainboard
Oneparallelportribboncable
Two Serial port ribbon cable

Contents
page
Chapter1-Introduction................................................... 1-1
SystemBlockDiagram ......................................................1-2
Chapter 2 - Hardware Design .......................................... 2-1
2-1 Overview...................................................................2-1
EP-5BTXA-E Layout ..................................................2-2
2-2 Connectors and Jumpers ............................................2-4
2-3 System Memory Configuration ...................................2-6
2-4 Cache Memory Configuration ....................................2-7
2-5 Real Time Clock Battey Replacement ..........................2-8
2-6 Integrated PCI Bridge .................................................2-9
Chapter 3 -Award BIOS Setup ........................................ 3-1
3-1 Standard CMOS Setup ...............................................3-2
3-2 BIOS Features Setup ..................................................3-2
3-3 Chipset Features Setup...............................................3-6
3-4 Power Management Setup ..........................................3-8
3-5 Plug & Play/PCI Configuration....................................3-11
3-6 Integrated Peripherals .................................................3-14
3-7 Load Setup Defaults ...................................................3-16
3-8 Change Supervisor or User Password .........................3-17
3-9 IDE HDD Auto Detection ...........................................3-18
3-10 HDD Low Level Format ..............................................2-20
3-11 Save & Exit Setup .......................................................3-20
3-12Exit WithoutSaving ....................................................3-20
Chapter4-TechnicalInformation....................................4-1
4-1 I/O & Memory Map ....................................................4-1
4-2 Time & DMA Channels Map ......................................4-2
4-3 Interrupt Map.............................................................4-2
4-4 RTC & CMOS RAM Map ...........................................4-3
AppendixA:POSTCodes...................................................................4-4
AppendixB:I/OConnectors...............................................................4-8

The"LOADSETUPDEFAULTS"functionloadsthesystemdefaultdatadirectlyfrom
ROMandinitializestheassociatedhardwareproperly. Thisfunctionisnecessarywhen
you accept this Mainboard, or the system CMOS data is corrupted.
LOAD SETUP DEFAULT
NOTE :
ROM PCI/ISA BIOS
CMOS SETUP UTILITY
AWARD SOFTWARE, INC.
Load SETUP Default (Y/N)? Y
STANDARD CMOS SETUP SUPERVISOR PASSWORD
BIOS FEATURES SETUP USER PASSWORD
CHIPSET FEATURES SETUP IDE HDD AUTO DETECTION
POWER MANAGEMENT SETUP HDD LOW LEVEL FORMAT
PNP/PCI CONFIGURA ETUP
INTEGRATED PERIPH SAVING
LOAD SETUP DEFAULTS
ESC: QUIT :SELECT ITEM
F10:Save & Exit Setup (Shift)F2 :Change Color
Load Setup Defaults Except Standard COMS SETUP

Introduction1-1
Chapter 1
Introduction
R
R
TheEP-5BTXA-Emainboardisahighperformancesystemhardware
based on Intel Pentium processor and is equipped with three PCI slots, three
standard ISA slots, a PnP Super I/O controller and two dual-port PCI-IDE
connectors for the future expansion. The hardware dimension is an AT form-
factorthatis220mmx200mmwithafour-layerdesigntechnology.
Specification
Intel82430TXPCIsetchipset.
Intel Pentium Processor operating at90 ~333 MHz (Easy CPU CLK
Setting JP3 : One Jumper Only) and P55C with321 ZIF socket7for
scalability to accept faster processors in the future.
Supports an onboard Switching Voltage Regulator to increase CPU and
System'sreliability.
SupportsCPUVcoreVoltage2.0V/12.1V/2.8V/2.9V/3.2Vselection.
Supports up to 256 MegaBytes of DRAM(a minimum of 8 MB) on board
(168-PinDIMMx2),BIOSautoEDODRAMandSDRAM
configuration.(RefertoChapter 2-4SystemMemoryConfiguration)
Supports Onboard Burst/Pipelined burst synchronous L2 Write Back
Cache.Thecachememoryis512KB(64KB*64SRAM).
Supports three 16-bit ISA slots and three 32-bit PCI slots and provides two
independent high performance PCI IDE interfaces capable of supporting PIO
Mode3andMode4devices.
Supports ATAPI(e.g.CD-ROM)devices and UltraDMA33forbothIDE
interface.
Supports 1 floppy port, 1 parallel port (EPP,ECP port), and 2 serial ports
(16550FastUARTcompatible)withPnPSuperI/Ochip.
Supports both PS/2 style mouse Header and AT keyboard connector
Supports Award Plug & Play BIOS . The BIOS is stored in Flash EPROM
form. It provides better upgradeability for the system.
Supports a CPU Hardware sleep and SMM (System Management Mode)
function.
Supports a USB header
Utilizesa Lithium battery whichprovidesenvironmental protection and
longerlife-time

1-2 EP-5BTXA-E
Pentium
processor
PIIX4
I/OBridge
324BGA
Graphics
Port_A
Port_B
>
Universal Serial Bus
ISA Slots
R
>
PCISlots
>
>
PB
SRAM
TAG <
<
Control
TAG
Control
PCIBUS
Super
I/O
Serial1
Serial2
FDD
Printer
>
>
HOSTBUS
BIOS
FlashEPROM
<MD[63:0]
>
MTXC
HOSTBridge
324BGA
MA[11:0]
CONTROL
Keyboard
BIOS
Figure 1-1 System Block Diagram
IDE
HDD
IDE CD-ROM
SDRAM

Hardware Design 2-1
Chapter 2
Hardware design
2-1 Overview
TheEP-5BTXA-EisdesignedwithIntel82430TXPCIsetchipsetwhichis
developed by INTEL Corporation to fully support Pentium Processor PCI/ISA
system.TheIntel82430TXPCIsetchipsetcanincreaseintegrationandimprove
performance designs. The chipset provides an integrated IDE controller with two high
performanceIDE interfaces for up to fourIDEdevices(harddevices, CD-ROM device,
etc). The PnP Super I/O controller provides the standard PC I/O functions: a floppy
interface,two16ByteFIFOserialportsandanEPP/ECPcapableparallelport.The EP-
5BTXA-Elayout is shown in the onet page for user's reference. Caremust be taken
wheninsertingmemorymodules,insertingCPUorevenpluggingPCI card into the
associated slots to avoid damaging any circuits or sockets on board. A cooling fan is
stronglyrecommendedwheninstalling P54C/P54CTB/P55C(MMX)/K5/K6/6x86
(6x86L) processor due to possible overheat.
TheEP-5BTXA-Esupportsaminimumof8MBofSystemMemoryandamaxi-
mum of 256MB with 512KB synchronous SRAM Onboard to increase system
performance.
The EP-5BTXA-Esupports synchronous DRAM.TheEP-5BTXA-E
provides two 168-pin DIMM sites for memory expansion. Each socket supports 8MB,
16MB,32MB,64MBand128MBDIMMsingle-sidedordouble-sidedmemory
modules.Thememorytimingrequires83MHz(12ns),100MHz(10ns)forSDRAM.This
mainboard has two 168-pin DIMM sites to support 3.3V (power level) Unbuffered
SynchronousDRAMs(SDRAM).Memoryparitygenerationandcheckingarenot
supported.
TheEP-5BTXA-E supportstwoOnboardPCIIDEconnectorsthatcansupport
PIO Mode/Ultra DMA 33 device and detect IDE harddisk type by BIOS utility
automatically.
The EP-5BTXA-EsupportsAward Plug & PlayBIOSfor the ISA andPCIcards.
The BIOS can be located in Flash EPROM. The advantage of having Flash EPROM is
much easier to replace BIOS code if necessary.
The EP-5BTXA-Ehas been designed with AT form-factor power connector. The
mainboardlayoutandsystemblockdiagramareshown in Figure 1-1 andFigure2-1.
R

2-2 EP-5BTXA-E
Figure2-1
AT Power Conn.
W83877F
PCI#3
PCI#2
PCI#1
<
Keyboard BIOS
EP-5BTXA-ELayout
SPEAKERTB-LED
G-LED RESET KEYLOCKHD-LED
FDD CONN.
Secondary IDE
SOCKET 7
64K*64
Primary IDE
+
+
+
PIIX4
MTXC
DIMM 2
DIMM 1
SLEEP
LPT1 COM2
COM1
1 2
27 28
1 6
JP2
5 10
J4
USBConn.
CN1
1
JP1
3
K/B CONN.
1
PS/2
Mouse
<
BIOS
1
IR CONN.
J2
JP3
BANK1
BANK0

Hardware Design 2-3
JP2 CPUVcorevoltageselectionforPentiumMMX/AMDK6/Cyrix
6x86Lor6x86MX
1-6 : 2.0V for AMD K6 fast processor (Reserved)
2-7 :2.8VforPentiumP55C(MMX)/Cyrix6X86L(DualVoltage)
3-8 :2.9VforAMDK6PR166/PR200or6x86MX-PR166/PR200/
RP233/PR266(DualVoltage)
4-9 :3.2VforAMDK6PR233/PR266(DualVoltage)
5-10 : 2.1V for AMD K6 fast processor (Reserved)
27 28
1 2
JP3:CPUClockRateSelect.(Easy-Setting-Single-Jumper)
These jumper settings are reserved for the future CPU
versions. When the future CPU versions are ready and
suitable for this mainboard, these jumper settings will be
correctly updated.
*
1 6
5 10
2.8V
2.9V
3.2V
2.1V
2.0V(Defaule)
2-2ConnectorsandJumpers
This section describes all of the connectors and jumpers equipped in the mainboard.
Please refer toFigure 2-1 for the location of each connector and jumper.The figure
in the following means connecting pin 1&2 and means connecting pin 2&3.
Jumpers with two pins are shown as for open and for close.
Pentium Bus Freqency
PentiumMMX x Cyrix 6x86(L) / 6x86MX
AMDK5 /K6 Multiplier IBM 6x86(L)/6x86MX
JP3
1-2 90MHz 60MHz x 1.5
3-4 100MHz 66MHz x 1.5
5-6 120MHz 60MHz x 2 6x86/L-PR150
7-8 133MHz 66MHz x 2 6x86/L/MX-PR166
9-10 75MHz x 2 6x86/L/MX-PR200
11-12 150MHz 60MHz x 2.5 6x86MX-PR166
13-14 166MHz 66MHz x 2.5 6x86MX-PR200
15-16 188MHz 75MHz x 2.5 6x86MX-PR233
17-18 200MHz 66MHz x 3 6x86MX-PR233
19-20 225MHz 75MHz x 3 6x86MX-PR266
21-22 233MHz 66MHz x 3.5 6x86MX-PR266
23-24 266MHz 66MHz x 4
25-26 300MHz 66MHz x 4.5
27-28 333MHz 66MHz x 5
*
*
*
*
*
*
*

2-4 EP-5BTXA-E
1.GND
2.+12V
3.GND
J3 ThePowerSupply(+12V)oftheCPUCooling FAN:
1
3
KeyLock -Keyboardlockswitch&PowerLEDconnector.
1.PowerLED(+)
2.N/C
3.GND
4.Keylock
5.GND
Speaker - connect to the system's speaker for beeping.
7.Speaker
8.N/C
9.GND
10.VCC
Reset - Close to restart system.
1
5
+
+
+
Sleep/Resume switch: Close to enter sleep mode.
A keystrobe or mouse movement (mouse driver exists) will
instantly "wake up"the system.(for AT Power Supply Only)
PowerSavingLEDindicator- LEDONwhenthesystemisinany
saving mode.
TurboLEDindicator-LEDONwhenahigherspeedisselected.
HarddiskLEDindicator -LEDONwhenOnboardPCIIDEHarddisks
activites.
7
10
J4

Hardware Design 2-5
JP1 ClearCMOS:
1-2:Normaloperation(Default)
2-3:ClearCMOSValues
This setting allows users to clear current CMOS data to back to
default by setting the jumper to 2-3 when system is off. This
jumper should be brought back to pin 1-2 to restore the normal
operation.
3
1
5.IRTX
5
1.VCC
2.NC
3.IRRX
4.GND
1
J2 IrDA/ASKIRCONNECTOR:
1615
CN1 USBCONNECTOR:
Reservedfor USB port Adapter
(refertoAPPENDIXB:I/OConnectors)
12
5
1
J1 PS/2MOUSECONNECTOR:
1.Data(RedWire)
2.Clock(BlueWire)
3.GND(Green)
4.NC
5.VCC(Yellow)

2-6 EP-5BTXA-E
DIMM(M1) DIMM2(M2) TOTAL Memory
(BANK 0) (BANK1) MAX.=256MB
NOTE: 1. DIMM module specification is 3.3V / unbuffered Synchronous
DRAM
SDRAM SDRAM
8MB, 16MB 8MB, 16MB
32MB, 64MB 32MB, 64MB =
128MB 128MB
x1
DIMM2
2-3SystemMemoryConfiguration
The EP-5BTXA-Esupports two168-pinDIMM module sockets toextend system
memory size. There is not jumper by hardware setting needed for memory configura-
tion. The following figures show all possible memory combinations.
DIMM1 >
BANK 0
BANK 1
>
3.3V Synchronous DRAM
or 3.3V EDO DRAM
3.3V Synchronous DRAM
or 3.3V EDO DRAM
MemoryConfigurationTable
x1
CENTER KEY ZONE
(3.3 V DRAM)
LEFT KEY ZONE
(UNBUFFERED)
DIMM Module Installation
Figure 2-2 displays the notch marks and what they should look like on your
DIMM memory module.
DIMMs have 168-pins and two notches that will match with the onboard
DIMM socket. DIMM modules are installed by placing the chip firmly into
the socket at a 90 degree angle and pressing straight down (figure 2-3) until
it fits tightly into the DIMM socket (figure 2-4).
Figure 2-2

Hardware Design 2-7
Figure 2-3
DIMM Module clip before installation
Figure 2-4
DIMM Module clip after installation
To remove the DIMM module simply press down both of the white clips on
either side and the module will be released from the socket.
When you have a DIMM module to plug into a 168-pin dual readout connnector, you
must make sure that the DIMM module is 3.3V/Unbuffered to supports Intel Pentium
Processor System.
*"BANK"=64Bit=DIMM1=DIMM2
*DIMMSDRAMmaybe83MHz(12ns),100MHz(10ns)or120MHz(8ns)busspeed.
R
2-4CacheMemoryConfiguration
The second level (L2) cache is installed in the mainboard to increase the system
performance.The EP-5BTXA-Esupports512KBpiplinedburstsynchronousSRAM.
64K*64
U8
U9
DATA SRAM
TAG
SRAM

2-8 EP-5BTXA-E
2-5 Real Time Clock Battery Replacement
ThebatterycanbereplacedbyaSanyo/PanasonicCR2032,or
otherequivalentcoinlithiumbattery.Pleasefollowthestepsbelowto
replace thebattery.
+
1.Remove 2.Insert
1
2
3
1
2
3
+
+
+
+
+

Hardware Design 2-9
2-6IntegratedPCIBridge
TheEP-5BTXA-Eutilizes Intel430TXPCIsetchipsettosupportIntelPentium
Processor PCI/ISA system. The Intel 82430TX PCIset chipset consists of one
82439TXsystemcontroller(MTXC)andone82371ABPCIISA/IDEAccelerator
(PIIX4) bridge chip. It provides an interface which translates CPU cycle into PCI bus
cycle and PCI burst read/write capability. In addition, it provides a high performance
PCI arbiter and supports four PCI Masters, Rotating Priority Mechanism, and Hidden
ArbitrationSchemeMinimizesArbitrationOverhead.The82371AB(PIIX4)supports
PCISpecificationRevision2.1CompliantandcontainsaUniversalSerialBus
interface with both host and hub control functions. EP-5BTXA-E reserves a USB
header or to provide two USB ports for serial transfer at 12 or 1.5 Mbit/sec. This
supports legacy keyboard and mouse software with USB-Base Keyboard and mouse.
TherearefourinterruptsineachPCIslot:INTA#,INTB#,INTC#,andINTD#,since
the EP-5BTXA-EadaptsthePCIauto-configurationwith the systemBIOSSetup
utility. When the system is turned on after adding a PCI add-in card, the BIOS
automaticallyconfigure interrupts, DMA channels,I/Ospace,andother paramaters.
You do not have to configure jumpers or worry about potential resource conflicts.
Because PCI cards use the same interrupt resource as ISA cards, you must specify
the interrupts used by ISA add-in cards in the BIOS Setup utility.
If a "Legacy card" (such as plug paddle card and cable for the ISA slot.) is plugged
inthesystem,modificationinthe ROMSETUPUTILITYbecomesnecessary.First,
enterPCICONFIGURATIONSETUPutilityfrom ROMSETUPUTILITYmainmenu
tosetthe"PCIIDEIRQMAPTO:ISA".
Second,youmustenterCHIPSETFEATURESSETUPUTILITYfromROMSETUP
UTILITYmainmenuandsetthe" OnboardPrimaryPCIIDE:DisabledandOnboard
SecondaryPCIIDE:Disable."WhenyouplugthePCI/ISAIDEcardintothesystem,
YoushouldDisabledOnboardPrimaryandSecondaryPCIIDEfromCHIPSET
FEATURESSETUPUTILITYtoo.
When no paddle card and cable, you can set the system interrupt request (IRQ) on
the "Legacy card" (refer to user's manual of the card) to a proper system IRQ level (In
general, card's Primary is assigned to INTA and Secondary is assigned to INTB). If
the card is plugged into slot 1(marked PCI#1), you cannot use the second slot
(marked PCI#2) because the Secondary INT signal takes INTB from the slot (refer to
Page3-13forcircuitdiagram).Theuserthenenters PCICONFIGURATIONSETUP
utilityfrom ROMSETUPUTILITYmainmenuandsetsthe" PCIIDEIRQMAPTO:
PCI-Slot 1" (It depends on the slot # where the Legacy card is plugged).
R

AWARD BIOS 3-1
Award'sROMBIOSprovidesabuilt-inSetupprogramwhichallowsusertomodifythe
basicsystemconfigurationandhardwareparameters. The modified data will be stored
inabattery-backedCMOSRAMsodatawillberetainedevenwhenthepoweristurned
off. In general, the information saved in the CMOS RAM stay unchanged unless there
isconfigurationchangeinthesystem,suchasharddrivereplacementornewequipment
change.
It is possible that the CMOS battery is dead. This will cause data lose in CMOS RAM.
If so, it is necessaiy to re-enter system configuration parameters.
To enter Setup Propgram
Poweronthecomputerandpress<Del>keyimmediately.ThiswillbringyouintoBIOS
CMOSSETUPUTILITY.
ROMPCI/ISABIOS(2A59IPA9)
CMOSSETUPUTILITY
AWARDSOFTWARE,INC.
STANDARD CMOS SETUP SUPERVISOR PASSWORD
BIOS FEATURES SETUP USER PASSWORD
CHIPSET FEATURES SETUP IDE HDD AUTO DETECTION
POWER MANAGEMENT SETUP HDD LOW LEVEL FORMAT
PNP/PCI CONFIGURATION SAVE & EXIT SETUP
INTEGRATED PERIPHERALS EXIT WITHOUT SAVING
LOAD SETUP DEFAULTS
ESC : QUIT : SELECT ITEM
F10 : Save & Exit Setup (Shift)F2 : Change Color
Time, Date, Hard Disk Type...
Figure3-1 CMOSSETUPUTILITY
The menu displays all the major selection items and allows user to select any shown
items. The selection is made by moving cursor (press any direction key ) to the item
and press 'Enter' key. An on-line help message is displayed at the bottom of the
screen as cursor is moving to various items which provides user better understand-
ing of each function. When a selection is made, the menu of selected item will appear
so the user can modify the associated configuration parameters.
Chapter 3
Award BIOS Setup

3-2 CHAPTER 3
3-1StandardCMOSSetup
Choose"STANDARDCMOSSETUP"inthe CMOSSETUPUTILITYMenu(Fig.3-1).
TheSTANDARDCMOSSETUPallowsusertoconfiguresystemsetting suchascurrent
date and time, type of hard disk drive installed in the system, floppy drive type, and the
typeofdisplaymonitor.Memorysizeisauto-detectedbytheBIOSanddisplayedforyour
reference.Whenafieldishighlighted(directionkeystomovecursorand<Enter>keyto
select), the entries in the field will be changed by pressing <PgDn> or <PgUp> keys or
user can enter new data directly from the keyboard.
Figure3-2 STANDARDCMOSSETUP
Selectingthe"BIOSFEATURESSETUP"optioninthe CMOSSETUPUTILITYmenu
allowsusertochangesystemrelatedparametersinthedisplayedmenu.Thismenushows
allofthemanufacturer'sdefaultvaluesof EP-5BTXA-E.Again,usercanmovethecursor
by pressing direction keys and <PgDn> or <PgUp> keys to modify the parameters.
Pressing [F1] key to display help message of the selected item.
This setup program also provides 2 convenient ways to load the default parameter data
fromBIOS[F6]orCMOS[F7]areaifshowndataiscorrupted.Thisprovides the system
a capability to recover from any possible error.
3-2 BIOS Features Setup
NOTE: The "Halt On :" field is to determine when to halt the system by the BIOS if error
occurrs during POST.
NOTE: If hard disk Primary Master/Slave and Secondary Master/Slave were used Auto,
then the hard disk size and model will be auto-detected on display during POST.
ROM PCI/ISA BIOS(2A59IPA9)
STANDARD CMOS SETUP
AWARD SOFTWARE, INC.
ESC : Quit : Select Item PU/PD/+/- : Modify
F1 : Help (Shift) F2 : Change Color
Date (mm:dd:yy) : Wed, Apr 17 1996
Time (hh:mm:ss) : 14 : 30 : 50
HARD DISKS TYPE SIZE CYLS HEAD PRECOMP LANDZONE SECTORS MODE
Primary Master : Auto 0 00 0 0 0 Auto
Primary Slave : Auto 0 00 0 0 0 Auto
Secondary Master : Auto 0 00 0 0 0 Auto
Secondary Slave : Auto 0 00 0 0 0 Auto
Drive A : 1.44M, 3.5 in.
Drive B : None
Floppy 3 Mode Support : Disabled
Video : EGA/VGA
Halt On : All Errors
Base Memory : 640K
Extended Memory : 5360K
Other Memory : 384K
Total Memory : 16384K

AWARD BIOS 3-3
Note: The Security Option contians "setup" and "system". The "setup" indicates
that the password setting is for CMOS only while the " system" indicates the
password setting is for both CMOS and system boot up procedure.
Virus Warning: This category flashes on the screen. During and after the system
boots up, any attempts to write to the boot sector or partition table of the hard disk
drive will halt the system and an error message will appear. You should then run an
anti-virus program to locate the virus. Keep in mind that this feature protects only the
boot sector, not the entire hard drive. Default value is Disabled
Enabled :Activates automatically when the system boots up causing a warning
message to appear when anything attempts to access the boot sector.
Disabled :No warning message to appear when anything attempts to access the
boot sector.
Note : Many disk diagnostic programs that access the boot sector table can trigger the
virus warning message. If you plan to run such a program, we recommend that you
firstdisable the virus warning.
ROM PCI/ISA BIOS(2A59IPA9)
BIOS FEATURES SETUP
AWARD SOFTWARE, INC.
Esc : Quit : Select Item
F1 : Help PU/PD/+/- : Modify
F5 : Old Values (Shift)F2 : Color
F7 : Load Setup Defaults
Figure3-3 BIOSFEATURESSETUP
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 D4000-D7FFF Shadow : Disabled
Swap Floppy Drive : Disabled D8000-DBFFF Shadow : Disabled
Boot Up Floppy Seek : Enabled DC000-DFFFF Shadow : Disabled
Boot Up NumLock Status : On
Boot UP System Speed : High
Gate A20 option : Fast
Typematic Rate Setting : Disabled
Typematic Rate (Chars/Sec) : 6
Type matic Delay (Msec) : 250
Security Option : Setup
PCI/VGA Palette Snoop : Disabled
Assign IRQ For VGA : Enabled
OS Select For DRAM > 64MB : Non-OS2
CPUInternalCache/ExternalCache:Thesetwocategoriesspeedupmemoryaccess.
however, it depends on CPU / chipset design. The default value is Enable. If your CPU is
withoutInternalCachethen this item "CPU Internal Cache" willnotbeshown.
Enabled :Enablecache.
Disable :Disable cache.

3-4 CHAPTER 3
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
somecheckitemsduringPOST.Thedefault is Enabled.
Enabled:EnablequickPOST.
Disabled:NormalPOST.
BootSequence:This category determines which drive is searched first for the O/S
(Operating System). Default value is A, C, SCSI. The following is your list of options.
[A,C,SCSI]-[C,A,SCSI]-[C,CDROM,A]-[CDROM,C,A]-[D,A,CDROM]
[E,A,CDROM]-[F,A,CDROM]-[SCSI,A,C]-[SCSIC,A]-[COnly],[LS/ZIP,C]
A,C:System will first search for floppy disk drive then hard disk drive.
C,A:System will first search for hard disk drive then floppy disk drive.
CDROM,C,A:SystemwillfirstsearchfortheCDROMdrive(IftheCDROMhasa
bootable CD title.) and second search hard disk drive then flopp
diskdrive.
C,CDROM,A:Systemwillfirstsearch for theharddiskdriveandsecond search
theCDROMdrive(IftheCDROM has a bootable CD title.) then
floppy disk drive.
Swap Floppy Drive:This willswapyourphysicaldrivelettersA&Bifyouare using
two floppy disks. Default value is Disabled.
Enabled : Floppy A & B are able to swap under DOS.
Disabled:Floppy A & B are not able to swap.
BootUpFloppySeek:During Power-On-Self-Test(POST),BIOSwilldetermineifthe
floppydiskdrive installedis40or 80tracks.Onlyis 360Ktype40tracks while760K,
1.2Mand1.44Mareall80tracks.ThedefaultvalueisEnabled.
Enabled :BIOS searches for floppy disk drive to determine if it is 40 or 80 tracks,
Note that BIOS cannot 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:Control the state oftheNumlock key whenthesystem
boots. The default value is On.
On : Keypad is number keys.
Off :Keypad is arrow keys.
Boot UP System Speed: Select Hight to boot at the default CPU speed; select Low to
boot at the speed of the AT bus.
High: Set the speed to high.
Low : Set the speed to low.
Gate A20 Option:This refers to the way the system addresses memory above 1MB
(extendedmemory).ThedefaultvalueisFast.
Normal :The A20 signal is controlled by keyboard controller or chipset hardware.
Fast : The A20 signal is controlled by Port 92 or chipset specific method.

AWARD BIOS 3-5
TypematicRateSetting:Thisdeterminesthekeystrokerepeatrate.
Enabled:Enabletypematicrateand typematic delay programming.
Disabled:Disable typematic rateandtypematicdelayprogramming.Theratewillbe
controlled by keyboard controller in your system.
Typematic Rate(Chars/Sec):
6 : 6 characters per second. 8 : 8 characters per second.
10: 10 characters per second. 12: 12 characters per second.
15: 15 characters per second. 20: 20 characters per second.
24: 24 characters per second. 30: 30 characters per second.
Typematic Delay(Msec): When holding a key, the time between the first and
second character displayed.
250 : 250msec.
500 : 500 msec.
750 : 750 msec.
1000: 1000 msec.
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 the access to Setup will be denied if the correct
password is not entered at the prompt.
Setup : The system will boot, but the access to Setup will be denied if the incorrect
password is not entered at the prompt.
PCI/VGAPaletteSnoop:ThisfiledcontrolstheabilityofaprimaryPCIVGA
controller to share a common palette(when a snoop write cycles) with an ISA
video card. The default value is Disabled.
Enabled:If an ISA card connects to a PCI VGA card via the VESA connector
and that ISA card connects to VGA monitor and that ISA card uses
theRAMDACofPCI card.
Disabled:DisabletheVGAcardPalettesnoopfunction.
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.
Enabled :Video shadow is enabled.
Disabled:Video shadow is disabled.
AssignIRQForVGA:ThedefaultValueisEnabled.
Enabled :The system was assigned IRQ for VGA card.
Disabled:The system was not assigned IRQ for VGA card.