Abit IT5E Series User manual

Part Number:MN-090-B21-71 Rev:1.02
Table of Contents
Chapter 1 Introduction of IT5 Series Features
(1) IT5V..................................................................................1-2
lSpecifications ................................................................1-2
lLayout diagram..............................................................1-4
lSystem block diagram....................................................1-5
(2) IT5H..................................................................................1-6
lSpecifications ................................................................1-6
lLayout diagram..............................................................1-8
lSystem block diagram....................................................1-9
Chapter 2 Installing the Mainboard
(1) Standard External Connectors............................................2-3
(2) Jumpers and Switches.......................................................2-10
(3) Presentation and Installation of the CPU...........................2-11
(4) Installing Pipeline Burst SRAM........................................2-14
(5) Installing System Memory <DRAM Memory>..................2-15
Chapter 3 Introduction to BIOS
(1) CPU setup <CPU SOFT MENU™>.....................................3-4
(2) Standard CMOS Setup Menu...........................................3-10
(3) BIOS Features Setup Menu..............................................3-12
(4) Chipset Features Setup Menu...........................................3-18
(5) Power Management Setup Menu......................................3-20
(6) PCI & Onboard I/O Setup................................................3-24
(7) Load BIOS Defaults.........................................................3-30
(8) Load Setup Defaults.........................................................3-30
(9) Password Setting..............................................................3-31
(10) IDE HDD Auto Detection..............................................3-32

Appendix A Quick Installation
Appendix B Intel Pentium CPUs
Appendix C AMD-K5 CPUs
Appendix D Cyrix 6x86 CPUs
Appendix E General Discussion about HDD Installation
Appendix F Technical Support
Appendix G Flash BIOS User Instructions

Introduction of IT5 Series Features 1-1
Chapter 1 Introduction of IT5
Series Features
The IT5 series has been especially designed for File server,
Workstation and Professional users. It can support a wide range of
processors, including all Intel CPUs (P54C) and Intel CPUs with MMX
(P55C), as well as all AMD-K5 and Cyrix 6x86/6x86L CPUs. It also takes
into account, as much as possible, all future CPUs.
This series uses SOFT MENU™technology, which means that all the
parameters can be configured without using DIP switches or jumpers.
The configuration is entirely achieved through a “Soft Switch”that allows
the user to set CPU speed and operating voltage with ease.
The IT5 series uses Intel 430VX and 430HX series chipsets, and has
256K or 512K Level-2 Pipeline Burst SRAM on board. It also provides
an extension slot allowing the user to upgrade Pipeline Burst SRAM to
512K.
Two 168-pin DIMM slots and four 72-pin SIMM slots meet the
requirements for all memory configurations required by high level
computing. The 168-pin DIMM slots support traditional Fast Page and
EDO DRAM as a memory standard for next generation 64-bit systems.
The two 168-pin DIMM slots have been reserved to meet requirements for
both present and future upgrades.
This series also provides two Universal Serial Bus (USB) ports and
meets the Concurrent PCI Rev. 2.1 standard. It also supports IDE
interface for Fast HDD (Mode 0~4), as well as IDE Bus Master. These
features also meet present and future interface standards and needs.
System BIOS features include Plug-and-Play (PnP), Advanced Power
Management (APM), the newest Desktop Management Interface (DMI), as
well as IT5’s unique CPU operating frequency and voltage setup feature in
order to meet modern computing demands.

1-2Chapter 1
(1) IT5V
l Specifications:
1. CPU frequency and voltage setup with CPU “SOFT MENU™”
lSetup of the mainboard’s frequency and voltage without DIP
Switches or Jumpers.
lModification of CPU operating voltage and frequency through
software configuration.
lModification of CPU operating voltage and frequency directly
on screen.
2. Uses ZIF CPU Socket 7 for easy CPU installation
lThree voltage regulator/cooling plate sets for a more stable
CPU operating environment
lSupports Intel Pentium®CPUs: 75MHz to 200MHz and
P55C CPUs with MMX
lSupports all AMD sixth generation AMD-K5™CPUs: 75MHz
to 100MHz
lSupports all Cyrix sixth generation 6x86™CPUs: P120+,
P133+, P150+, P166+, P200+
lReserved circuitry supports future sixth generation CPUs
3. Chipset
lIntel 430VX chipset
lSupports standard version PCI 2.1
4. L2 Cache Memory
l256K or 512K of cache memory (Pipeline Burst SRAM)
lCache memory upgradeable to 512K
5. System DRAM
lFour 72-pin SIMM sockets: support FP and EDO DRAM
lTwo 168-pin DIMM sockets: support FP, EDO and
Synchronous DRAM (SDRAM)
lDIMM sockets use PC modules (3.3V Unbuffered DRAM)
lUp to 128MB memory configuration possible

Introduction of IT5 Series Features 1-3
6. System BIOS
lAWARD BIOS
lSupports Plug-and-Play (PnP)
lSupports Advanced Power Management (APM)
lSupports Desktop Management Interface (DMI)
7. Multi I/O features
lTwo Universal Serial Bus (USB) ports
lFour fast IDE channels (PIO mode 0~4 and Bus Master)
lOne EPP/ECP parallel port and one 16550 serial port
lTwo floppy disk drive connectors (FDD) (360K, 720K, 1.2M,
1.44M and 2.88M)
8. Other features
lStandard AT architecture dimensions
lFour ISA bus slots and four PCI bus slots
lSupports 3-MODE for a special Japanese floppy disk drive
lSupports two bootable hard disks--able to run two different
operating systems
Note: All brand names and trademarks are the property of their respective owners.

1-4Chapter 1
lLayout diagram
Fig 1-1 Layout diagram

Introduction of IT5 Series Features 1-5
lSystem block diagram
Fig. 1-2 System block diagram
Pentium  Processor
3.3V
Host BUS
Control
Address
Data
Second
Level Cache
Addr
Ctrl
Tag Ctrl Data
Ctrl
TIO[0..7]
PCI BUS TXD Ctrl
Plink
Control
Address/Data
Fast
IDE
ISA BUS
Universal Serial Bus
TDX
Main
Memory
(DRAM)
CACHE
(SRAM)
TAG
TVX
PIIX3
CD ROM &
Hard Disk
USB
1
USB
2
PCI Device(s)
ALi
M5123
ISA Device(s)
Serial LPT
FDC

1-6Chapter 1
(2) IT5H
l Specifications:
1. CPU frequency and voltage configuration with CPU “SOFT
MENU™”
lSetup of the mainboard’s frequency and voltage without DIP
Switches or Jumpers.
lModification of CPU operating voltage and frequency through
software configuration.
lModification of CPU operating voltage and frequency directly
on screen.
2. Uses ZIF CPU Socket 7 for easy CPU installation
lThree voltage regulator/cooling plate sets for a more stable
CPU operating environment
lSupports Intel Pentium®CPUs: 75MHz to 200MHz and P55C
CPUs with MMX
lSupports all AMD sixth generation AMD-K5™CPUs: 75MHz
to 166MHz, AMD-K6™CPUs: 200MHz and 233MHz
lSupports all Cyrix sixth generation 6x86™CPUs: P120+, P133+,
P150+, P166+
lReserved circuitry supports future sixth generation CPUs
3. Chipset
lIntel 430 HX chipset
lSupports standard version PCI 2.1
4. L2 Cache Memory
l256K or 512K of cache memory (Pipeline Burst SRAM)
lCache memory upgradeable to 512K
5. System DRAM
lFour 72-pin SIMM sockets: support FP and EDO DRAM
lTwo 168-pin DIMM sockets: support FP, EDO
lDIMM sockets use PC modules (3.3V Unbuffered DRAM)
lSupports error check and correction (ECC) function
lUp to 512MB memory configuration possible
6. System BIOS
lAWARD BIOS

Introduction of IT5 Series Features 1-7
lSupports Plug-and-Play (PnP)
lSupports Advanced Power Management (APM)
lSupports Desktop Management Interface (DMI)
7. Multi I/O features
lTwo Universal Serial Bus (USB) ports
lFour fast IDE channels (PIO mode 0~4 and Bus Master)
lOne EPP/ECP parallel port and one 16550 serial port
lTwo floppy disk drive connectors (FDD) (360K, 720K, 1.2M,
1.44M and 2.88M)
8. Other features
lStandard AT architecture dimensions
lFour ISA bus slots and four PCI bus slots
lSupports 3-MODE for a special Japanese floppy disk drive
lSupports two bootable hard disks--able to run two different
operating systems
Note: All brand names and trademarks are the property of their respective owners.

1-8Chapter 1
lLayout diagram
Fig. 1-3 Layout diagram

Introduction of IT5 Series Features 1-9
lSystem block diagram
Fig. 1-4 System block diagram
Pentium  Processor
3.3V
Control
Address
Host BUS
Second
Level Cache
Data
Addr
Ctrl
Ctrl
Tag Ctrl
ECC
TIO[0..7]
TIO[8..10] Data
PCI BUS Control
Address/Data
Fast
IDE
Universal Serial Bus
ISA BUS
USB
1
USB
2
Main
Memory
(DRAM)
CACHE
(SRAM)
TAG
TXC
PIIX3
CD ROM &
Hard Disk
PCI Device(s)
ISA Device(s)
ALi
M5123
Serial LPT
FDC

1-10 Chapter 1

Installing the Mainboard 2-1
Chapter 2 Installing the
Mainboard
This mainboard series not only provides all standard equipment for
classic personal computers, but also provides great flexibility for meeting
future upgrade demands. This chapter will introduce step by step all the
standard equipment and will also present, as completely as possible future
upgrade capabilities. This mainboard is able to support all Intel Pentium
including P55C with MMX, Cyrix 6x86, 6x86L and AMD-K5 processors
now on the market. (For details, see specifications in Chapter 1.)
However, we cannot guarantee that the description given in this manual on
the circuitry of your mainboard will work for processors not listed in
Chapter 1. For example, the operating voltage of Cyrix’s next generation
CPUs is unknown at the present time. Thus we were not able to include
these specifications in your motherboard. We will supply further
information about CPU support when new CPUs arrive on the market.
This chapter is organized according the following features:
ŒStandard external connectors
•Jumpers and switches
ŽInstalling the CPU--steps for installing Intel, Cyrix and AMD
processors.
•Installing cache memory--If you don’t want to upgrade the cache
memory you can skip this chapter.
•Installing the system memory.
NNNN
Before proceeding with the installation
Before installing the mainboard please be sure to turn off or disconnect
the power supply unit. Before making any modifications to the hardware
configuration of the mainboard, the power supply to any areas of the
mainboard you plan to modify should be turned off to avoid unnecessary
damage to the hardware.

2-2Chapter 2
&
User friendly instructions
Our objective is to enable the novice computer user to perform the
installation by themselves. We have attempted to write this document in
a very clear, concise and descriptive manner to help overcome any obstacles
you may face during installation. Please read our instructions carefully
and follow them carefully step-by-step.

Installing the Mainboard 2-3
(1)Standard External Connectors
Inside the case of any computer several cables and plugs have to be
connected. These cables and plugs are usually connected one-by-one to
connectors located on the mainboard. You need to carefully pay
attention to any connection orientation the cables may have and, if any,
notice the position of the first pin of the connector. In the explanations
that follow, we will describe the signifigance of the first pin.
PN1 - Keylock connector Please pay attention to pin position and
orientation
This connector has a specific orientation. Connect the five-thread
keylock connector cable to the PN1 connector pins on the mainboard.
Pin number Name or significance of signal
1+5VDC
2No connection
3Ground
4Keyboard inhibit Signal
5Ground

2-4Chapter 2
The “keylock switch”is used to lock the computer’s
keyboard. This disables the keyboard so that
unauthorized persons cannot use it. When this function
is in use, you will need to use the unlock key to activate
the keyboard.
PN1 - IDE LED connector
This connector has a specific orientation. Connect the two-thread IDE
LED connector cable attached to the case to the IDE LED connector on
the mainboard.
Pin number Name or significance of signal
7LED’s Cathode
8LED’s Anode
PN1 - Standby connector
There is no specific orientation. Most of the present AT cases do not
support this feature so most of you can ignore this instruction. If your
case has a cable for the Standby feature, you should connect this cable to
the connector on the Mainboard.
Pin number Name or significance of signal
10 Standby power supply<+5VSB>
11 Control signal of computer switch of the case
The “standby connector,”unlike the traditional mechanical
switch, is an electronic way to turn the computer’s power
off. To use this feature, the power supply system must
permit a shutdown power supply (+5VSB), support the
electronic switch feature, and must also be used with
connector JS1 on the mainboard. For example, when
using Windows 95, your computer will automatically shut
down after having saved your work when you exit
Windows. You do not need to use the mechanical
switch to turn the computer off.
PN1 - Hardware Suspend switch
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Installing the Mainboard 2-5
There is no specific orientation. Connect the two-thread hardware
suspend plug to the PN1 connector pins on the mainboard. Since
most cases do not support this feature, most of you ignore this instruction.
Furthermore, this feature is not necessary as it is already a part of the
mainboard.
Pin number Name or significance of the signal
13 Suspend
14 Ground
PN2 - Hardware Reset connector
There is no specific orientation. Connect the two-thread hardware reset
cable to the PN2 connector pins on the mainboard.
Pin number Name or significance of signal
1Ground
2Hardware reset signal
The “Hardware Reset”is used to reset the computer
during operation without turning the computer off and
back on. For example, if you are running an application
that stops responding to the computer, you may press the
Reset button to restart the computer.
PN2 - Speaker connector
There is no specific orientation. Connect the four-thread speaker cable to
the PN2 connector pins on the mainboard.
Pin number Name or significance of signal
4+5VDC
5Ground
6Ground
7Sound Signal
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2-6Chapter 2
PN2 - Turbo switch LED connector
This connector has a specific orientation. Connect the two-thread turbo
switch LED plug to the PN2 connector pins on the mainboard.
Pin number Name or significance of signal
9Anode terminal of Turbo LED
10 Cathode terminal of Turbo LED
The “hardware Turbo LED”indicates the status of
hardware operating speed.
JS1 - Power Control connector
This has a specific orientation. The present power supply units of AT
computer do not support this feature, so you can ignore this connector. If
your power supply unit features this connector, insert plug JS1, but be sure
that the signification of the signal cable is the same, and be sure to use this
feature in connection with the Standby connector on connector PN1.
Pin number Name of the signal or signification
1Power supply control signal <PS_ON>
2Standby power supply <+5VSB>
3Ground
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Installing the Mainboard 2-7
FAN - CPU Fan power connector
This has a specific orientation. Connect the three-threads CPU fan cable to
the Fan connector.
Pin number Name of the signal or signification
1Ground
2 +12V
3Ground
Mouse - PS/2 Mouse connector Watch the pin number and the
orientation
This has a specific orientation. Connect the six-threads PS/2 Mouse cable
provided to the Mouse connector on the mainboard.
Pin number Name of the signal or signification
1Mouse data
2No connection
3Ground
4+5VDC
5Ground
6Mouse clock
The “PS/2 Mouse Port”is different from COM1 or COM2
serial ports to which you can also connect a Mouse. This
mainboard features an extra PS/2 Mouse port, so when you
buy a mouse, be sure that it is a PS/2 Mouse before
connecting it to this port. But if you cannot find any PS/2
Mouse, you can still use COM1 or COM2 to connect a
serial mouse to your computer.
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2-8Chapter 2
J2 - Keyboard Connector
This has an orientation pin. Connect your keyboard connector to connector
J2 on the mainboard.
Pin number Name of the signal or signification
1Keyboard clock
2Keyboard data
3No connection
4Ground
5+5VDC
P8/P9 - Power input Connectors Watch the pin number and the
orientation
These have a specific orientation. The three warning marks indicate that if
you make a mistake in pin number or connection orientation, you could
destroy your equipment. During installation, you just need to connect to the
correct pins and in the correct orientation, and to connect connectors P8
and P9 of the power supply unit to the connectors on the mainboard.
Pin number Name of the signal or
signification Pin number Name of the signal or signification
1POWERGOOD 7Ground
2+5VDC 8Ground
3+12VDC 9-5VDC
4-12VDC 10 +5VDC
5Ground 11 +5VDC
6Ground 12 +5VDC