Abit IT5A Specifikace

Part No : MN-112-2A0-01 Rev: 1.00No warranty or representation, either expressed or implied, is made with respectto the quality, accuracy or fitness

1-4 Chapter 1nLayout diagramFig 1-1 Layout diagram

Introduction of IT5A Features 1- 5nSystem block diagramFig. 1-2 IT5A System block diagram

1-6 Chapter 1

Installing the Mainboard 2- 1Chapter 2 Installing the MainboardThis IT5A mainboard not only can be used with all standard eq

2-2 Chapter 2&User friendly instructionsOur objective is to enable the novice computer user to perform the installationby themselves. We have atte

Installing the Mainboard 2- 3¬ Installing the Mainboard to the CasingMost computer cases will have a base on which there will be many

2-4 Chapter 2-Standard External ConnectorsInside the case of any computer several cables and plugs have to beconnected. These cables

Installing the Mainboard 2- 5The “keylock switch” is used to lock the computer’s keyboard.This disables the keyboard so that

2-6 Chapter 2PN1 - Hardware Reset connectorsThere is no specific orientation. Connect the two-thread hardware reset cableto the PN1 connector pins

Installing the Mainboard 2- 7 ATXPWR - ATX Power input ConnectorsThese have a specific orientation. The three warning marks

2-8 Chapter 2MOUSE - PS/2 Mouse ConnectorAttach a PS/2 mouse to this 6-pin Din-connector.Pin number Name or significance of signal1 Mouse data2 No

Installing the Mainboard 2- 9®Jumpers and SwitchesCCMOS : Delete the contents of the CMOS ( 5 VSB POWER OFF )This jumper is set

2-10 Chapter 2¯Presentation and Installation of the CPUSince 1996, every two or three months, Intel adds new models to the PentiumCPU series. That is

Installing the Mainboard 2- 11AT Bus clockAlso referred to as ISA SPEED, or AT CLOCK, or even ISA Bus clock. Tenyears ago, the orig

2-12 Chapter 21. IT5A CPU frequency setting (SW2)The following tables will present the adjustment for the 586 CPU series. Please setup the correct adj

Installing the Mainboard 2- 13IDT WinChip C6 CPUIDT-WinChipC6ExternalClockInternalClockExternal ClockFactorReserve External ClockFrequ

2-14 Chapter 2SW2 CPU Vcore settingsNominalOutput VoltageDACOUTPin Name S1VC1 VC2 VC3 VC4 VC52.0OFF OFF OFF OFF OFF2.1ON OFF OFF OFF OFF2.2OFF ON OFF

Installing the Mainboard 2- 15VIO VC6 VC7 VC83.3OFF OFF OFF3.38OFF OFF ON3.52OFF ON OFF3.60ON OFF OFF3.68ON OFF ON3.80ON ON OFF3.86ON

2-16 Chapter 2°Installing System Memory¡iDRAM Memory¡jWhen this mainboard was designed, we not only took into account presentneeds, but we also tried

Installing the Mainboard 2- 17¡i168-pin DIMM modules specifications¡jAccording to the standards defined by JEDEC, there are a lot

2-18 Chapter 2 Table 2-1 168-pin DIMM Module Installation¡i DIMM1¡j ¡i DIMM2¡jTotal memory size1st¡i 2nd or 3rd¡j pair 2nd¡i 1st or 3rd¡j pair1Mx64¡i

Introduction to BIOS 3-1Chapter 3 Introduction to BIOS When you start the computer, it is contr

3-2 Chapter 3Three to five seconds after the message is displayed, if you press the Delkey, or if you press the Ctrl-Alt-Esc keys simultaneously, you

Introduction to BIOS 3-3CMOS DATAMaybe you have heard somebody saying that their CMOSDATA was lost. Wha

3-4 Chapter 3¬Standard CMOS Setup MenuThese are the basic configuration parameters of the BIOS. Theseparameters include the date, hour, VGA c

Introduction to BIOS 3-5ä LBA (Logical Block Addressing) mode:LBA mode supports hard disk drives up to 8.4Gig

3-6 Chapter 3-BIOS Features Setup MenuBIOS Features Setup Menu has already been set for maximum operation. Ifyou do not really understand the options

Introduction to BIOS 3-7CPU External Cache:This item is used to enable or to disable the CPU external cache.

3-8 Chapter 3Boot Up Floppy Seek:When the computer boots up, the BIOS detects if the system has a FDD ornot. When this item is enabled, if the BIOS do

Introduction to BIOS 3-9Security Option:This option can be set to System or to Setup.After you have created a

Table of ContentsChapter 1 Introduction of IT5A Featuresl Specifications...

3-10 Chapter 3Shadowing address ranges (C8000-CBFFF Shadow):This option allows you to decide if the memory block (BIOS) of aninterface car

Introduction to BIOS 3-11SHADOWWhat is a SHADOW? The BIOS of standard video or interfacecards is stored in

3-12 Chapter 3®Chipset Features Setup MenuThe Chipset Features Setup Menu is used to modify the contents of thebuffers in the chipset on the

Introduction to BIOS 3-13Attention:Unless you are very familiar with your computer and with theDRAM configur

3-14 Chapter 3„Power Management Setup MenuThe difference between Green PCs and traditional computers is that GreenPCs have a power management feature.

Introduction to BIOS 3-152. Use arrow keys to go to the item you want to configure. To change t

3-16 Chapter 3ä Suspend or Suspend ( Susp,Stby -- > Off )The video will only be switched off in Standby or Suspend mode.ä Suspend ( Suspend -- >

Introduction to BIOS 3-17Suspend Mode:When the setting selected for "Power Management" is "Use

3-18 Chapter 3… PCI & Onboard I/O SetupIn this menu, you can change the INT# and IRQ of the PCI bus and the onboardI/O device, I/O port address an

Introduction to BIOS 3-19PCI IDE Card 2nd Channel:This option can be enabled or disabled. BIOS default is Ena

Appendix A Quick InstallationAppendix B Intel Pentium CPUsAppendix C AMD-K5.K6 CPUsAppendix D Cyrix / IBM 6x86 CPUsAppendix E General Discussion about

3-20 Chapter 3On board Serial Port 2:This is used to specify the I/O address and IRQ of Serial Port 2. Ten options areavailable: Disa

Introduction to BIOS 3-21On board IDE-1 Controller:Onboard PCI IDE 1 controller can be set as Enable or Disab

3-22 Chapter 3±Load BIOS DefaultsBIOS defaults are the reference settings that allow your system to work ata comparatively low performance. When you c

Introduction to BIOS 3-23³Password SettingThis option allows you to set a password required to star

3-24 Chapter 3´IDE HDD Auto DetectionIn old systems, after you had installed the hard disk, you had to know thehard disk specifications, such as the n

Quick InstallationA-1Appendix A Quick InstallationAppendix A will give you a simplified installation procedure, in order toallow you to install your m

Appendix AA-2IDE2- Connect one end of the 40-pincable that comes with the drive to the CD-ROM connector, and the other end tothe IDE2 pin connec

Quick InstallationA-3PN1 - There is a specific orientation for pin 10 and pin 11. Connect the two-threads suspend switch connector of the comput

Appendix AA-4Watch the pin position andthe orientationATXPWR - Connect the power supply unit to the correct connectors on themainboard.Pin n

Quick InstallationA-5FAN1 - There is a specificorientation. Connect the three-threads CPU Fan power cable to the Fanconnector on the ma

Intel Pentium CPUsB-1Appendix B Intel Pentium CPUsPentium 100MHzCPU CPU Internal Bus External PowerCPU DPSpeed Spec Clock Factor Clock Vc

Appendix BB-2 Pentium 133MHzCPU CPU Internal Bus External PowerCPU DPSpeed Spec Clock Factor Clock Vcore VIO Timing Supp. NoteP54CS Q0

Intel Pentium CPUsB-3Pentium 166MHzCPU CPU Internal Bus External PowerCPU DPSpeed Spec Clock Factor Clock Vcore VIO Timing Supp. NoteP54C

Appendix BB-4Pentium 200MHzCPU CPU Internal Bus External PowerCPU DPSpeed Spec Clock Factor Clock Vcore VIO Timing Supp. NoteP54CS Q0951

AMD-K5 . K6 CPUs C-1Appendix C AMD-K5 / K6 CPUsRecognizing AMD CPU speed, voltage and package: AMD-K5-PR100 A B Q xx66MHzReservedCase Temperature

Appendix CC-2 MD - K6- PR100 66MHzP-Rating100, 133, 166, 200, 233,266, 300InternalClock100MHz133MHz166MHz200MHz233MHz266MHz300MHzProcessor n

Cyrix 6x86 CPUs D-1Appendix D Cyrix/IBM 6x86 CPUsRecognizing Cyrix CPU speed and voltage: 6x86MX-PR166 133 MHz2.9V Name of theprocessor6x86

Appendix DD-2

General Discussion about HDD InstallationE-1Appendix E General Discussion About HDD InstallationMost recent HDDs use IDE interface. Installing an IDE

Introduction of IT5A Features 1- 1Chapter 1 Introduction of IT5A FeaturesThe IT5A has been especially designe

Appendix EE-2The higher the MODE value is, the better the hard disk data transfer rate.But this does not mean that you can select the highest mode val

General Discussion about HDD InstallationE-3Installing a hard disk:In the Standard CMOS Setup Menu,♦ Primary means the first connector on the m

Appendix EE-4Installing two HDDs: The red line on the connection cable must be lined up with pin 1 on the connector.Method 1: Set the hard disk drive

General Discussion about HDD InstallationE-5Installing three HDDs: The red line on the connection cable must be lined up with pin 1 on the connector.M

Appendix EE-6BIOS Setup:♦ If all your HDDs are new, you can use the IDE HDD Auto Detectionoption in the CMOS to auto detect the parameters of all your

General Discussion about HDD InstallationE-7After you have partitioned the hard disk with FDISK, the system willreboot automatically. Boot

Appendix EE-8

Flash BIOS User Instructions F-1Appendix F Flash BIOS UserInstructionsExample 1 To update BIOS and create a backup of

F-2Appendix FExplanation of parameter names:/CC: Clears CMOS data/CP: Clears PnP dataRemarks:¬ When executing AWDFLASH.EXE, do not run HIMEM.SYS andEM

Installation of AGP driver G-1Appendix G Installation of AGP driver1. The ALi AGP driver can be found

1-2 Chapter 1IT5AnSpecifications1. Supports ATX power supply2. Adjustment for Frequency and Voltage: Uses a DIP switch or jumper wires to adjust the f

Appendix G G-23. After executing the “setup” you will see the “ALi M1541 AGP driver setup” as

Installation of IDE Bus Master Driver H-1Appendix HInstallation of IDE Bus Master Driver1. Please locate the Ali_IDE file on the CD-ROM in order to in

Appendix HH-2Fig-33. Then click “yes” to setup IDE driver (shown as Fig-3)4. Installation will be completed automatically once you see the following

Technical Support I-1Appendix I Technical SupportL When you have a problem during operation...In order to help our technical su

I-2 Appendix I2Example 2: With a system including the mainboard (with CPU, DRAM,COAST...) HDD, CD-ROM, FDD, VGA CARD, LAN CARD,MPEG CAR

Technical Support I-3$ $ Main instructions...To fill in this “Technical Support Form”, refer to the step-by-step instructionsgi

I-4 Appendix I4. DRIVER REV: Note the driver version number indicated on the DEVICE DRIVER disk as “Release *.**”.Example:< IDE Device DriverDriv

Technical Support I-59. System Memory (DRAM): Indicate the brand and specifications (SIMM/DIMM)of your system memory.Example

I-6 Appendix I

Technical Support I-7& Technical Support FormCompany name: ( Phone #:J Contact: /Fax #: Model * BIOS ID # *

Introduction of IT5A Features 1- 37. System BIOSAWARD BIOSSupports Plug-and-Play (PnP)Supports Advanced Config

I-8 Appendix I