EPOX P55-VP 2 User manual

Introduction1-1
Chapter 1
Introduction
R
The P55-VP 2mainboard is a high performance system hardware based
on Intel Pentium processor and is equipped with three PCI slots, four
standardISAslots,SuperMulti-I/O controlleranddual portPCI-IDE
connectorsforthefutureexpansion.Thehardwaredimensionis220mmx
230mmwithafour-layer-designtechnology.
Specification
VIAApolloVPXPCIsetchipset.
Intel Pentium Processor, AMD K5/K6 & Cyrix M1 operating at75 ~ 200
MHz andP55C with321 ZIF socket 7 and scalability to accept faster
Processors in the future.
Supports up to 192 MegaBytes of DRAM (a minimum of 8 MB) on board
(72-pinSIMMx4&168-pinDIMMx1). BIOSwillautometicallydetectand
configure FP/EDO and Synchronous DRAM (Refer to Chapter 2-3 System
MemoryConfiguration).
Supports Onboard Pipelined Burst (synchronous) L2WriteBack/Through
Cache.Thecachememorycombinationcanbe256KB/512KB(32KB*32,
64KB*32SRAM,respectively).
Supports four 16 bit ISA slots and three 32 bit PCI slots and provides two
independent high performance PCI IDE interfaces capable of supporting
PIOMode3/4andUltra-DMA33devices.TheP55-VP2supportsthreePCI
Bus Masters and a jumperless PCI INT# control scheme which reduces
configurationconfusion whenplugging in PCI I/O controller card(s).
SupportsATAPI(e.g.CD-ROM)devicesonbothIDEinterfaces.
Supports1floppyport,1parallelport(EPP,ECPport), 2 serial ports (16550
FastUARTcompatible)and1USB Connector.
Supports a PS/2 style mouse and standard AT style keyboard connectors.
SupportsAwardPlug & Play BIOS . TheBIOS is stored in Flash EPROM
form. It provides better upgradeability for the system.
Supports CPU Hardware sleep and SMM (System Management Mode).
P55-VP2utilizes Lithiumbatterywhichprovidesenvironmentalprotection
and longer battery life.
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1-2 P55-VP 2
P55-VP 2 Layout
BIOS
PCI#1
<
BIOS
PRINTER
W83877F
5
1
82C585
VIA
VIA
K/B
CONN.
Power Conn.
J1
DIMM1 SIMM1 SIMM2 SIMM3 SIMM4
COM2COM1
J2 1
5
3 1 JP1
FDD CONN.
PCI#3 PCI#2
64K*32 64K*32
82C587
VIA
82C587
VIA
Figure1-1
HD-LED+
G-LED+ TB-LED+
SPEAKER
KEYLOCK J5
5 1 3 1 3 1
JP8 JP7
J3
JP3 1
3
TAG SRAM
\Bank 4,5 / \ Bank 2,3 /
Bank 0,1
Primary IDE
Secondary IDE
SLEEP
RESET
1 2
7 8
JP6
JP2-2 JP2-1
JP2-3
JP2-4
82C586A
JP4 1
3
Socket 7

Hardware Design 2-1
2-1 Mainboard Layout
TheP55-VP2isdesignedwithVIAApolloVPXPCIset chipset which isdevel-
oped by VIA Corporation to fully support Pentium Processor PCI/ISA system. The
VIAApolloVPXPCIsetchipsetcanincreaseintegrationandimproveperformance
designs.The chipset provides an integrated IDEcontroller with two high perfor-
manceIDEinterfacesforuptofourIDEdevices(harddevices,CD-ROM device,etc).
TheWinbondW83877FSuperI/Ocontroller providesthestandardPCI/Ofunction:
floppyinterface,two16ByteFIFOserialportsandEPP/ECPcapableparallelport.
The P55-VP 2 layout is shown in the previous page for user's reference. Care must
betakenwheninsertingmemorymodules,insertingCPUorevenpluggingPCIcard
into associated slots to avoid damaging any circuits or sockets on board. A cooling
fanisstronglyrecommendedwheninstallingP54C/P54CTB/P55C/K5/K6/6x86/6x86L/
M2 processor due to possible overheat.
TheP55-VP2supportsaminimumof4MBandamaximumof192MBofSystem
MemorywhileL2Cachecanbe256KB/512KBsynchronousSRAMOnboardto
increasesystemperformance.(RefertoPage2-6CacheMemoryConfigurationfor
thedetails.)
TheP55-VP 2supports standard Fast Page, EDO(ExtendedData Out or Hyper
Page Mode) or synchronous DRAM.The P55-VP 2provides four 72-pin SIMM
andone168-pin DIMM sites for memory expansion.Thesockets support 1M x
32(4MB),2Mx32(8MB),4Mx32(16MB),and8Mx32(32MB)single-sidedordouble-
sidedmemory modules.The memorytimingrequires70ns Fastpagedevicesor60
nsEDODRAM.(DRAMModulesmaybeparity[x36]ornon-parity[x32].
TheP55-VP2supportstwoOnboardPCIIDEconnectors,andautomaticallydetects
IDEharddisktypebyBIOSutilityautomatic.
The P55-VP 2supports Award Plug & PlayBIOSfor the ISA and PCI cards. The
BIOScanbelocated inFlashEPROMwhichcanreplace BIOS codeeasilyifneces-
sary.
Chapter 2
Hardware design
R

2-2 P55-VP 2
2-2ConnectorsandJumpers
This section describes all connectors and jumpers equipped in the mainboard. Please
refer to Figure 1-1for location of each connector and jumper.
1.Power LED(+)
2.N/C
3.GND
4.Keylock
5.GND
1
5
4
1.Speaker
2.N/C
3.GND
4.GND
J5 1
Power Saving LED indicator - LED ON when system is
in any Saving mode.
Reset Switch - Closed to restart system.
Speaker - connect to the system's speaker for beeping.
KeyLock-Keyboardlockswitch&PowerLEDconnector.
Sleep/Resume switch: Closedtoentersleepmode.
Akeystrobeormousemovement(mousedriverexists).Will
instantly "wake up" the system.
TurboLEDindicator-LEDONwhenhigherspeedisselected.
IDELEDindicator-LEDONwhenOnboardPCIIDE
Harddisksactivate.
+
+
+# There is no deturbo function so that the turbo LED is always ON.
J3 The Power Supply (+12V) of the CPU Cooling FAN
1.GND
2.+12V
3.GND
3
1

Hardware Design 2-3
1
5
J1 PS/2 MOUSE CONNECTOR
1.RED wire
2.BLUE wire
3.GREEN wire
4.NC
5.YELLOW wire
1
J2 IrDA/ASKIRCONNECTOR
5
1.VCC
2.NC
3.IRRX
4.GND
5.IRTX
JP1 EPROMBIOSSelection
1-2:5VFlashEPROM.(SST,Winbond).
2-3:12VFlashEPROM(Intel).
JP3 CPUVcorevoltageselection
1-2:2.9VForAMDK6-PR166/200
2-3:2.8VForPentiumMMXProcessor&Cyrix6x86L
Open: 3.2V (Reserved)
JP4 CPUTypeSelection
1-2:Auto(forIntelPentiumMMXProcessor,AMDK5/
K6andCyrix6x86/6x86L/M2)
2-3:Manual(forIntelPentiumProcessor)
3
1
3
1
3
1
JP6 DIMM Working Voltage Selection
1-2, 3-4 : 5V
5-6, 7-8 : 3.3V (Default)
(Refer to 2-3 : Memory Configuration for the detail)
1 2
7 8

2-4 P55-VP 2
6x86/L-PR120+
CPU TYPE JP2-1 JP2-2 JP2-3 JP2-4 JP7 JP8
6x86/L-PR150+
6x86/L-PR166+ ON
OFF
OFF
ON
IBM/ Cyrix 6x86(L)/6x86MXInstallation
*CPUOo.isCPUoperationat75,90,100MHz,andetc.
ON ON
ON
ON
OFF
OFF
ON
6x86/L-PR133+
6x86/L-PR200+
6x86/L-PR200+
2-3 1-2
OFF OFF
OFF
OFF
ON
ON
OFF OFF
ON
ON
OFF
OFF
ON
Note 1
Note 2
Note1:IBM/CyrixPR200withsynchornousPCI
Note2:IBM/CyrixPR200withasynchornousPCIforPCI2.0
spec. Bus Master Device
* Clock is System Clock.
Intel Pentium Processor / Pentium MMX Processor
/AMD K5 /K6 Installation
2-3 2-3
1-2 2-3
2-3 1-2
1-2 1-2
RR
ON OFF ON
ON
ON
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
ON ON
OFF
ON
OFF ON
ON
OFF
ON
OFF ON
ON
ON
ON
ON
ON
ON
ON
ON
Clock/CPU Op. JP2-1 JP2-2 JP2-3 JP2-4 JP7 JP8
66/200 MHz
JP8 JP7
3 1 3 1
60/90 MHz
66/100 MHz
66/133 MHz
60/150 MHz
60/180 MHz
66/166 MHz
JP2 1 2 3 4
50/75 MHz
60/120 MHz
OFF
6x86MX-PR200
6x86MX-PR166 ON
OFF
OFF
ON ON
ON
OFF
OFF6x86MX-PR166
6x86MX-PR200
6x86MX-PR200
2-3 2-3
OFF OFF
OFF
ON
ON
OFF OFF
ON
ON
OFF
OFF
ON
Note 1
Note 2
66MHz x 2
75MHz x 2
75MHz x 2
60MHz x 2.5
66MHz x 2.5

Hardware Design 2-5
*6x86-PR120+=50MHzx2/100MHz,6x86-PR133+=55MHzx2/110MHz
*6x86-PR150+=60MHzx2/120MHz,6x86-PR166+=66MHzx2/133MHz
*6x86-PR200+=75MHzx2/150MHz
2-3SystemMemoryConfiguration
The P55-VP 2 supports different type of settings for the system memory. The
followingfiguresand table providesallpossiblememorycombinations. (Pleaserefer
toAppendixC:MemoryConfigurationTableforthedetails).
3
1
JP3 CPUVcorevoltageselection
1-2:2.9VForAMDK6-PR166/200
2-3:2.8VForPentiumMMXProcessor&Cyrix6x86L
Open:3.2V(Reserved)
JP4 CPUTypeSelection
1-2:Auto(forIntelPentiumMMXProcessor,AMDK5/K6
andCyrix6x86/6x86L/M2)
2-3:Manual(for IntelPentiumProcessor)
1
3
>
>
>
DIMM
SIMM4
SIMM2
SIMM3 BANK 4,5 5V FP / EDO DRAM
BANK 2,3 5V FP / EDO DRAM
3V Synchronous DRAM
or 3V FP / EDO DRAM
BANK 0,1
NOTE :1.P55-VP2supports both FastPageDRAMandEDO DRAM SIMMs,but
they cannot be used in the same memory bank.
2.TheKEYZOOMoftheDIMMsocketis3.3V/Unbuffered.
SIMM1
LEFT KEY ZONE CENTER KEY ZONE
DRAM chip

2-6 P55-VP 2
2-4CacheMemoryConfiguration
The second level (L2) of cache is installed in the mainboard to increase the system
performance. The P55-VP 2 supports different type of combinations for the cache
installation.Pleaserefer to thefollowingconfigurationsforthe details.
DATA SRAM
64K*32
U19 U20
SYN.CACHE On Board
256KB 32K*32 x 2
512KB 64K*32 x 2
Size (U19,U20)
TAG SRAM
U21
The P55-VP 2supports168-pinDIMMmoduletoextend system memory size. You
caninstall(3.3V /Unbuffered)FastPage,EDO orSynchronousDRAM.Besides, to
support5VFP and EDO DRAM with DIMMsocket,TheP55-VP 2 provides JP6 to
allow user using 3.3V/Unbuffered DIMM module with 5V FP and EDO DRAM
chips. The setting of the JP6 is shown as follows:
When you have a DIMM module to plug into a 168-pin dual readout connnector,
youmustmakesurethattheKEYZOOMoftheDIMMmoduleis3.3V/Unbuffered
and supports Intel Pentium Processor System.
JP6 DIMM Working Voltage Selection
1-2, 3-4 : 5V
5-6, 7-8 : 3.3V (Default)
1 2
7 8
64K*32
R

Hardware Design 2-7
2-5IntegratedPCIBridge
The P55-VP 2 utilizes PCIsetchipsettosupportIntelPentium ProcessorPCI/ISA
system.TheVIAApolloVPXPCIsetchipsetconsistsofthe82C585VPsystem
controller(TSC),two82C587VPDataPath(TDP)devices,andone82C586APCIISA/
IDEAcceleratorbridge chip. Itprovidesaninterfacewhich translates CPUcycleinto
PCIbuscycle,andPCIburstread/writecapability.Inaddition,itprovideshigh
performancePCIarbitortosupportfourPCIMasters,RotatingPriorityMechanism,
andHiddenArbitrationSchemeMinimizesArbitrationOverhead.
TherearefourinterruptsineachPCIslot:INTA#,INTB#,INTC#,andINTD#.Since
the P55-VP 2adapts the PCI auto-configuration with the system BIOS Setup utility.
Whenthesystemis turned on after adding a PCI add-incard,theBIOS automatically
configure interrupts, DMA channels, I/O space, and other 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 interrupt
used by ISA add-in cards in the BIOS Setup utility.
However, if a "Legacy card" (such as plugging a paddle card and cable into an ISA
slot)ispluggedinthesystem,modificationinthe ROMSETUPUTILITYbecomes
necessary.Firstofall,youmustenterPCICONFIGURATIONSETUPutilityfrom
theROMSETUPUTILITYmainmenutoset"ISA"forthe"PCIIDEIRQMAPTO
Secondly,youmustentertheCHIPSETFEATURESSETUPUTILITYfromtheROM
SETUPUTILITYmainmenuandset"Disable"forthe"OnboardPrimaryPCIIDE
andtheOnboardSecondaryPCIIDE.WhenyouplugPCI/ISAIDEcardsintothe
system,Youshouldselect"Disabled"fortheOnboardPrimaryandSecondaryPCI
IDEfromtheCHIPSETFEATURESSETUPUTILITYtoo.
You can set the system interrupt request (IRQ) on some "Legacy cards" which have
on paddle card and cable. (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 second slot
(markedPCI#2) becausetheSecondaryINTsignaltakesINTBfromtheslot(refer to
Page3-12forcircuitdiagram).Theuserthenentersthe PCICONFIGURATION
SETUPutilityfromthe ROMSETUPUTILITYmainmenuandset"PCI-Slot1"for
the"PCI IDE IRQMAPTO(Thisdependsonthe slot#wheretheLegacy cardis
plugged).
.
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AWARD BIOS 3-1
CHAPTER 3
AWARD BIOS SETUP
Award'sROMBIOSprovidesabuilt-insetupprogramwhichallowsusertomodifythe
basicsystemconfigurationandhardwareparameters.Themodifieddatawillbestored
inabattery-backedCMOSRAMsodatawillberetainedevenwhenthepoweristurned
off.Ingeneral,theinformationsavedintheCMOSRAMstaysunchangedunlessthere
isaconfigurationchangeinthesystem,suchasaharddrivereplacementoranewdevice
installation.
If this does happen you will need to reconfigure your configuration parameter.
To Enter Setup Propgram
Poweronthecomputerandpress<Del>keyimmediately.ThiswillbringyouintoBIOS
CMOSSETUPUTILITY.
ROMPCI/ISABIOS(2A5LDPA9)
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...
Figure 3-1 CMOS SETUP UTILITY
Themenudisplaysallmajorselectionitems. Select the item you need to reconfigure.
The selection is made by moving cursor (press any direction key ) to the item and
press the 'Enter' key. An on-line help message is displayed at the bottom of the
screen as the cursor is moving to various items which provides a better understand-
ingof each function. Whena selection is made,the menu of selecteditem will appear
so the user can modify the associated configuration parameters.

3-2 CHAPTER 3
3-1 STANDARD CMOS SETUP
Choose"STANDARDCMOSSETUP"inthe CMOSSETUPUTILITYMenu(Fig.3-1).
The STANDARD CMOS SETUP allowsuser to configure system setting suchas the
currentdateandtime,typeofharddiskdriveinstalled, floppydrivetype,anddisplaytype.
Memorysizeisauto-detectedbytheBIOSanddisplayedforyourreference.Whenafield
ishighlighted(usedirectionkeystomovecursorand <Enter>keytoselect),theentries
inthefieldwillbechangedbypressing<PgDn>or<PgUp>keys or user can enter new
datadirectlyfromthekeyboard.
Figure 3-2 STANDARD CMOS SETUP
Selectingthe"BIOSFEATURESSETUP"optioninthe CMOSSETUPUTILITYmenu
allowsusertochangesystemrelatedparametersinthedisplayedmenu.Thismenushows
allofthemanufacturer'sdefaultvaluesoftheP55-VP2.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.
Thissetup program also provides2 convenient ways toload the default parameterdata
fromBIOS[F6]orCMOS[F7]areaifshowndataiscorrupted.Thisprovides thesystem
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 an error
occurrs.
NOTE: If the hard disk Primary Master/Slave and the Secondary Master/Slave are set
as "Auto", then the hard disk size and model will be auto-detected.
ROM PCI/ISA BIOS(2A5LDPA9)
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 : Disable
Video : EGA/VGA
Halt On : All Errors
Base Memory : 640K
Extended Memory: 15360K
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 pass-
word setting is for both CMOS and system boot up.
CPUInternalCache/ExternalCache: Thesetwocategoriesspeedupmemory
access. However, it depends on CPU/chipset design. The default value is Enabled.
IfyourCPUiswithoutInternalCachethenthisitem"CPUInternalCache"willnot
be shown.
Enabled:Enablecache.
Disable :Disablecache.
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
drivewillhaltthesystemand an error message will appear. Youshouldthenrunan
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 any attempt to access the boot sector or
harddiskpartitiontable.
Disabled:No warning message to appear when any attempt to access the boot sector
orharddiskpartitiontable.
ROM PCI/ISA BIOS(2A5LDPA9)
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
Figure 3-3 BIOS FEATURES SETUP
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 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
OS Select For DRAM > 64MB : Non-OS2

3-4 CHAPTER 3
Quick Power On Self Test:ThiscategoryspeedsupPower On Self Test (POST)
afteryou power on the computer. If itis set to Enable, BIOS will shortenor skip
somecheckingitemsduringPOST.
Enabled:EnablequickPOST.
Disabled:NormalPOST.
BootSequence:Thiscategorydetermineswhichdriveissearchedfirstfor
theO/S(OperatingSystem).ThedefaultvalueisA,C.
A,C :Thesystemwillsearchfor floppy disk drive first then hard disk drive.
C,A :Thesystemwillsearchfor hard disk drive first then floppy disk drive.
Swap Floppy Drive:ThiswillswapyourphysicaldrivelettersA&Bifyouareusing
two floppy disks. The default value is Disabled.
Enabled : Floppy A & B will be swapped under the O/S.
Disabled :Floppy A & B will be not swapped.
BootUpFloppySeek: DuringPower-On-Self-Test (POST),BIOSwilldetermineifthe
floppydiskdriveinstalledis40or80tracks.Only360Ktypeis40trackswhile760K,
1.2Mand1.44Mareall80tracks.ThedefaultvalueisEnabled.
Enabled :BIOS searches forfloppydiskdrivetodetermineif it is 40or80tracks.
NotethatBIOScannottellfrom720K,1.2Mor1.44Mdrivetypeastheyare
all80tracks.
Disabled: BIOS will not search for the type of floppy disk drive by track number.
Note that there will not be any warning message if the drive installed is
360K.
Boot Up NumLock Status: The default value is On.
On : Keypad is number keys.
Off : Keypad is arrow keys.
BootUP System Speed: Select defaultsystemspeed.Thesystem willrunatthe
selected speed after the system boots.
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
Typematic Rate Setting: This determines the typematic rate.
Enabled:Enabletypematicrateandtypematicdelayprogramming.
Disabled:Disabletypematicrate and typematic delayprogramming.Thesystem
BIOS will use default value of 2 items and the default is controlled by the
keyboard.
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.
TypematicDelay(Msec):Thisdetecminesthetimebetweenthefirstandsecond
character displayed, when holding a key.
250:250msec.
500:500msec.
750:750msec.
1000:1000msec.
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 correct
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:IfanISAcardconnectstoa PCI VGA card via the VESA connector
and the ISA card connects to VGA monitor and uses the RAMDAC of
PCIcard,thePCI/VGAPaletteSnoopisenabled.
Disabled:DisabletheVGAcardPalettesnoopfunction.
VideoBIOSShadow:ItdetermineswhethervideoBIOSwillbecopiedtoRAM,
however,itisoptionalfrom chipset design. Video Shadow will increase the video
speed.
Enabled :Video shadow is enabled.
Disabled:Video shadow is disabled.

3-6 CHAPTER 3
3-3 CHIPSET FEATURES SETUP
Choose the "CHIPSET FEATURES SETUP"in the CMOS SETUP UTILITY
menutodisplay thefollowingmenu.
ROM PCI/ISA BIOS(2A5LDPA9)
CHIPSET FEATURES SETUP
AWARD SOFTWARE, INC.
C8000 - CBFFF Shadow:
CC000- CFFFF Shadow:
D0000 - D3FFF Shadow:
D4000 - D7FFF Shadow:
D8000 - DBFFF Shadow:
DC000- DFFFF Shadow:
These categories determine whether optional ROM will be copied to RAM by 16K
byte or 32K byte perunit and the size depends on the chipset.
Enabled : Optional shadow is enabled.
Disabled: Optional shadow is disabled.
DRAM Auto Configuration : 70 ns
DRAM Timing Control : Auto
Video BIOS Cacheable : Enabled
System BIOS Cacheable : Disabled
Memory Hole At 15Mb Addr. : Disabled
Fast DRAM Decoding : Disabled
Sustained 3T Write : Enabled
2 Bank PBSRAM : 3-1-1-1
Read Pipeline : Enabled
Write Pipeline : Enabled
Cache Timing : Fast
Linear Burst : Disabled
SDRAM Cycle Length : 2
SDRAM Bank Interleave : Disabled Esc : Quit : Select Item
F1 : Help PU/PD/+/- : Modify
F5 : Old Values (Shift)F2 : Color
F7 : Load Setup Defaults
Note: When you insert slower memery modules in the system and set a faster
timing,maybethesystemwillhangup.
Figure 3-4 CHIPSET FEATURES SETUP

AWARD BIOS 3-7
DRAM Timing: The default value is 60ns.
60ns :2 (faster) Burst Wait State, for 60~70ns Fast Page Mode/EDO DRAM.
70ns : 3 (slower) Burst Wait State, for 70ns Fast Page Mode/EDO DRAM.
VideoBIOS Cacheable: Thedefaultvalueis Enabled.
Enabled :EnabledtheVideoBIOSCacheableto speeduptheVGAPerformance.
Disabled:DisabledtheVideoBIOSCacheablefunction.
Memory Hole at 15M-16M: The default value is Disabled.
Disabled:Normal Setting.
Enabled : This field enableds the main memory (15~16MB) remap to ISA BUS.

3-8 CHAPTER 3
3-4 POWER MANAGEMENT SETUP
Choosethe"POWERMANAGEMENTSETUP"inthe CMOSSETUPUTILITY
to display the following screen. This menu allows the user to modify the power
managementparametersandIRQsignals.Ingeneral,theseparametersshouldnot
be changed unless it is absolutely necessary.
Figure 3-5 POWER MANAGEMENT SETUP
ROM PCI/ISA BIOS
POWER MANAGEMENT SETUP
AWARD SOFTWARE, INC.
Again, user can move the cursor by pressing direction keys to the field needed to be
modified and press <PgDn> or <PgUp> to alter item selection. You can only change
the content of Doze Mode, Standby Mode, and Suspend Mode when the Power
Management is set to 'User Define'.
3-4-1 TheDescriptionof the PowerManagement
A. PowerManagementmodeselection:
Disabled :ThesystemoperatesinNORMALconditions(Non-GREEN)
and the Power Management function is disabled.
Max.saving:Thismodewillmaximizethepowersavingcapability.
Min.saving: Thismodewillminimizethepowersavingcapability.
User define: Allowusertodefinetime-outparameters to control powersaving
mode.Refertoitem B shown below.
Esc : Quit : Select Item
F1 : Help PU/PD/+/- : Modify
F5 : Old Values (Shift)F2 : Color
F7 : Load Setup Defaults
Power Management : User Define ** Power Down & Resume Events **
PM Control by APM : Yes IRQ5 (LPT 2) : Primary
Video off Option : Suspend -> Off IRQ6 (Floppy Disk) : Disabled
Video off Method : V/H SYNC+Blank IRQ7 (LPT 1) : Primary
Conserve Mode : Disabled IRQ8 (RTC Alarm) : Disabled
Modem Use IRO : 3 IRQ9 (IRQ2 Redir) : Primary
**PMTimers** IRQ10 (Reserved) : Primary
HDD Power Down : Disable IRQ11 (Reserved) : Primary
Doze Mode : Disable IRQ12 (PS/2 Mouse) : Primary
Suspend Mode : Disable IRQ13 (Coprocessor) : Primary
IRQ14 (Hard Disk) : Primary
** PMEvents ** IRQ15 (Reserved) : Disabled
VGA: OFF
LPT& COM : LPT /COM
HDD & FDD : OFF
DMA /master : OFF
Primary INTR : ON
IRQ3 (COM 2) : Primary
IRQ4 (COM 1) : Primary

AWARD BIOS 3-9
B. Time-outparameters:
HDDStandby
HDDStandbytimercanbesetfrom1to15minute(s).
SystemDoze
The "System Doze" mode timer starts to count when there is no "PM events"
occurred.Thevalid time-outsettingisfrom1 minuteupto1 hour.
System Suspend
This function works only when the Pentium Procssor is installed. Thetimer starts
to count when "System Standby" mode timer is timed out and no "PM Events"
occurred.Validrangeisfrom1minute upto1hour.
3-4-2 Descriptionof theGreen Functions
The P55-VP 2 supports HDD Power Down, Doze and Suspend power saving functions.
Inaddition,thehardwaresuspendfunctionissupported whentheJ5-SLEEP(Refer
to Figure1-1) is closed to enter the Suspend function.
The detailed description of these functions is provided in the next page.
HDDStandbyMode
Whensystem stops reading or wiriting HDD, the timer startsto count. The system will
cutoffthe HDD power when timer runsoutof time. The system will notresume
operationuntileitherareadfromorawirtetoHDDcommandisexecutedagain.
DozeMode
ThesystemhardwarewilldropdownCPUclockfromnomalworkingspeed
whenDozemodetime-out occurs.
SuspendMode
When the system suspend timer times out, the system will enter the suspend mode
andthechipsetwillstopCPUclockimmediately.Thepowerconsumptionin
Suspend Mode is lower than in standby mode. The screen is also blanked out.

3-10 CHAPTER 3
PM Events:
AWARDBIOSdefines15PMEventsinthepowermanagementmode(Doze&
suspend). The user can initialize any PM Events to be "Enable" or "Disable".
When the system detects all of the enabled events, do not have any activity. It will
start the system Doze timer first if the "Power Management" is not "Disabled". Once
the system Doze timer is timed out, it will process doze power saving procedure
bystartingthesystemsuspendtimer.Whenthesuspendtimertimesout,alloftheCPU
clock will stop by dropping system clock down to zero and remains this way
until any one of the "Enabled" event occurrs.
3-5 PNP/PCI CONFIGURATION
ThePNP/PCIconfigurationprogramisfortheusertomodifythePCI/ISAIRQsignals
when various PCI/ISA cards are inserted in the PCI or ISA slots.
WARNING : Any misplacing IRQ could cause system can't pick out the rescouces.
ROM PCI/ISA BIOS(2A5LDPA9)
PNP/PCI CONFIGURATION
AWARD SOFTWARE, INC.
ESC : Quit : Select Item
F1 : Help PU/PD/+/- : Modify
F5 : No Change (Shift) F2 : Color
F7 : Load Setup Defaults
Figure 3-6 PCI CONFIGURATION SETUP
PNP Installed : No CPU to PCI Write Buffer : Enabled
Resources Controlled By : Manual PCI Dynamic Bursting : Enabled
Reset Configuration Data : Disabled PCI Master 0 WS Write : Enabled
PCI Peer Concurrency : Enabled
IRQ-3 assigned to : Legacy ISA PCI Delay Transaction : Disabled
IRQ-4 assigned to : Legacy ISA
IRQ-5 assigned to : PCI/ISA PnP PCI IRQ Actived By : Level
IRQ-7 assigned to : Legacy ISA PCI IDE IRQ Map To : PCI-AUTO
IRQ-9 assigned to : PCI/ISA PnP Primary IDE INT# : A
IRQ-10 assigned to : PCI/ISA PnP Secondary IDE INT# : B
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-5 assigned to : PCI/ISA PnP
DMA-6 assigned to : PCI/ISA PnP
DMA-7 assigned to : PCI/ISA PnP

AWARD BIOS 3-11
ResourceControlledBy:ThedefaultvalueisManual.
Manual: Thefield defines that the PNPCard's resource is controlled by manual.
Youcan set whethe IRQ-X or DMA-X isassignedtoPCI/ISA PNP or
LegacyISA Cards.
Auto: IfyourISAcardandPCI card are all PNP cards. SetthisfieldAuto.
TheBIOSwillassigntheinterruptresourceautomatically.
ResetConfigurationData: ThedefaultvalueisDisabled.
Disabled: NormalSetting
Enabled: IfyouplugsomeLegacuycards in the system and record intoESCD
(ExtendedSystem Configuration Data).Youcansetthis field tobeEnabled
andtoclear ESCD at onetime,whensomeLegacycardsare removed.
PCIIDEIRQMapTo:ThedefaultvalueisPCI-AUTO.
Whenyouhavetrue PCI card(s)pluggedintothesystem,you will notneed
to change any thing here in the SETUPprogram. However, if you do not
know whether you are using a true PCI card, please refer to your PCI
card user's manual for the details.
When you have a Legacy card (described in section 2-5) to plug
into the system,a proper setting is extremely important or it may cause the
system hung up. The diagram shown below tells you how the Rotating
PriorityMechanismisdesigned.
Figure 3-7 The Combination of PCI INT# lines
PCI
Chipset
INTA
INTD
PCI#1PCI#2 INTA
INTD
INTB
INTA
INTB
INTBINTC
INTC
INTCINTD
PCI#3
INTC
INTB
INTD
INTA