DFI 586ITX User manual

586ITX
Rev.A+
System Board
User’s Manual
- 33370410 -

FCC Statement on Class B
This equipment has been tested and found to comply with the limits for a Class
B digital device, pursuant to Part 15 of the FCC rules. These limits are
designed to provide reasonable protection against harmful interference when
the equipment is operated in a residential installation. This equipment
generates, uses and can radiate radio frequency energy and, if not installed
and used in accordance with the instruction manual, may cause harmful
interference to radio communications. However, there is no guarantee that
interference will not occur in a particular installation. If this equipment does
cause harmful interference to radio or television reception, which can be
determined by turning the equipment off and on, the user is encouraged to try
to correct the interference by one or more of the following measures:
•Reorient or relocate the receiving antenna.
•Increase the separation between the equipment and the receiver.
•Connect the equipment into an outlet on a circuit different from that to
which the receiver is connected.
•Consult the dealer or an experienced radio TV technician for help.
Notice:
1.The changes or modifications not expressly approved by the party
responsible for compliance could void the user's authority to operate the
equipment.
2.Shielded interface cables must be used in order to comply with the
emission limits.
Caution:
Danger of explosion if battery incorrectly replaced.
Replace only with the same or equivalent type recommended by the manufacturer.
Dispose of used batteries according to the manufacturer’s instructions.
The manufacturer makes no warranties with respect to this documentation and
disclaims any implied warranties of merchantability, quality, or fitness for any
particular purpose. The information in this document is subject to change
without notice. The manufacturer reserves the right to make revisions to this
publication and to make changes to any and/or all parts of its content, at any
time, without obligation to notify any person or entity of such changes. Further,
the manufacturer assumes no responsibility for any errors that may appear in
this document.

Table of Contents
Chapter 1: Introduction............................................................ 5
Features and Specifications.................................................. 6
Package Checklist .............................................................. 8
Chapter 2: Hardware Installation............................................... 9
Preparing the Area.............................................................. 9
Handling the System Board.................................................. 9
Installing the System Board.................................................10
Board Layout ....................................................................12
System Memory................................................................14
DIMM........................................................................14
SIMM........................................................................15
Cache Memory.................................................................18
Processor Installation.........................................................18
Jumper Settings for Intel Processors.................................. 20
Jumper Settings for AMD-K5/K6 Processors.......................21
Installing Upgrade CPUs................................................22
InstallingA Fan/Heatsink................................................24
Jumper Settings for CMOS Clear..........................................26
Jumper Settings for Modem Ring-in.......................................26
Factory Testing Jumpers......................................................27
Ports and Connectors.........................................................28
Serial Ports.................................................................28
Parallel Port ................................................................28
Floppy Disk Drive Controller...........................................29
IDE Hard Disk Interface.................................................30
Universal Serial Bus Connectors......................................32
IrDA Connector............................................................33
Installing Expansion Cards...................................................34
Chapter 3: Software Installation...............................................35
Award BIOS CMOS Setup Utility...........................................35
Standard CMOS Setup..................................................36
BIOS Features Setup....................................................40
Chipset Features Setup.................................................44
Power Management Setup.............................................44
PNP/PCI Configuration Setup..........................................48
Load Fail-Safe Settings..................................................50

4
Load Optimal Settings...................................................50
Integrated Peripherals...................................................51
Supervisor Password....................................................54
User Password............................................................54
IDE HDD Auto Detection................................................55
HDD Low Level Format .................................................57
Save & Exit Setup........................................................58
Exit Without Saving.......................................................58
System Error Report ..........................................................59
Driver Installation...............................................................61
Chapter 4: Troubleshooting Checklist.............................................64
Appendix A: Types of Modules......................................................67
Appendix B: Memory and I/O Maps................................................69
Appendix C: Connector Pin Assignments.......................................71

5
The 586ITX, equipped with a 321-pin Zero Insertion Force (ZIF) CPU
socket, is a Pentiumprocessor-class system board supporting Intel
Pentiumprocessors running at 90MHz, 100MHz, 120MHz, 133MHz,
150MHz, 166MHz and 200MHz frequencies. The 586ITXalso supports
Intel Pentiumprocessor with MMX™technology - 166/200/233MHz, fu-
ture IntelPentiumOverDriveprocessors, AMD-K5™PR90/PR100/
PR120/PR133/PR166, and AMD-K6™PR2-166/PR2-200/PR2-233.
The 586ITX system board can support 8MB to 256MB of system
memory. It is equipped with two DIMM sockets using x64 EDO, fast
page mode or SDRAM, and 4 SIMM sockets using EDO or fast page
mode x32 DRAM. This system board also supports 512KB pipeline
burst SRAM.
The 586ITX system board can support ACPI Specification, Modem
Wake-Up, PC 97 Compliance, and Dual Function Power Button to en-
hance its performance. ACPI (Advanced Configuration Power Interface)
has energy saving features which enable operating systems to reliably
manage and coordinate power planes, PnP (Plug-and-Play) peripherals,
and cooling fans. ACPI is the specification of Microsoft's anticipated
PC 97 "OnNow" design allowing continual "power on" with reduced en-
ergy consumption. The Modem Wake-Up feature allows the "sleeping"
PC to power on to respond to incoming calls.
PC 97 Compliance defines the adherence to Plug-and-Play compatibil-
ity, hardware power management, and 32-bit device drivers for Win-
dows 95& Windows NTspecifications. Dual Function Power Button
allows two distinct OFF modes. In Sleep mode, a PC powers down but
not off. In Soft-Off, a PC shuts down but requires a reboot to "awaken"
it.
The 586ITX design is based on the Peripheral Component Interconnect
(PCI) local bus and Industry Standard Architecture (ISA) standards. It is
equipped with 3 dedicated PCI slots, 2 dedicated 16-bit ISA slots and 1
shared PCI/ISA slot.
Chapter 1
Introduction

6
The 586ITX is equipped with two NS16C550A-compatible serial ports,
an SPP/ECP/EPP parallel port, a shrouded floppy disk header, and two
shrouded PCI IDE headers with bus mastering capabilities that highly
reduce CPU use during disk transfer. This system board is also
equipped with one mini-DIN-6 PS/2 mouse port, one mini-DIN-6 PS/2
keyboard port, two USB ports and one IrDA connector for wireless con-
nectivity between your computer and peripheral devices.
The 586ITX system board is designed to fit into an ATX form factor
case. Using an ATX power supply, you can either shut down your com-
puter by pressing the Power button located on the front bezel of your
computer or by executing the Shut Down command under the Windows
95 operating system.
Features and Specifications
Processor
•Intel Pentiumprocessor with MMX™technology - 166/200/233MHz
•Intel Pentium90/100/120/133/150/166/200MHz
•Future PentiumOverDrive processors
•Cyrix6x86™& 6x86L PR150+/PR166+ and M2 series (supported
in future revision)
•AMD-K5™PR90/PR100/PR120/PR133/PR150/PR166
•AMD-K6™PR2-166/PR2-200/PR2-233
Chipset
•Intel82430TX PCIset
Cache Memory
•512KB pipeline burst, direct map write-back cache installed on the
system board
System Memory
•8MB to 256MB memory
•Two 168-pin DIMM sockets using x64 EDO (60/70ns), fast page
mode (60/70ns), or SDRAM (10/12/13ns), 3.3V
•Four 72-pin SIMM sockets using EDO or fast page mode x32
DRAM, 60/70ns, 5V

7
BIOS
•Award BIOS, Windows95 Plug and Play compatible
•Flash EPROM for easy BIOS upgrades
Energy Efficient Design
•Supports ACPI specification and OS Directed Power Management
•System power management supported
•CPU stopped clock control
•Hardware supports SMI green mode
•Microsoft/IntelAPM 1.2 compliant
•Soft Power supported - ACPI v1.0a specification
PCI IDE Interface
•Ultra DMA/33 supported (Synchronous DMA mode - data transfer
rate up to 33MB/sec.)
•DMA Mode 2 Bus Master IDE (data transfer rate up to 22.2MB/sec.)
•PIO Mode 3 and Mode 4 Enhanced IDE (data transfer rate up to
16.6MB/sec.)
•Bus mastering reduces CPU utilization during disk transfer
•ATAPI CD-ROM supported
Integrated I/O
•Ultra I/O controller
•Two NS16C550A-compatible high speed UARTs
•One SPP/ECP/EPP parallel port
•Supports 360KB, 720KB, 1.2MB, 1.44MB, and 2.88MB floppy drives
CPU Socket
•321-pin ZIF socket (IntelSocket 7)
•Equipped with a switching power module that supports 2.8V, 2.9V,
3.2V, 3.3V and 3.5V
Connectors
•2 connectors for external USB (Universal Serial Bus) ports
•1 connector for IrDA interface
•2 DB-9 serial ports
•1 DB-25 parallel port
•2 IDE connectors
•1 floppy connector

8
•1 mini-DIN-6 PS/2 mouse port
•1 mini-DIN-6 PS/2 keyboard port
•1 20-pin ATX power supply connector
Expansion Slots
•3 dedicated PCI slots
•2 dedicated 16-bit ISA slots
•1 shared PCI/ISA slot
PCB
•4 layers, ATX form factor
•30.48cm (12") x 23.04cm (9.07")
Package Checklist
The 586ITX package contains the following items:
•The 586ITX system board
•The 586ITX user’s manual
•One 40-pin IDE hard disk cable
•One 34-pin floppy disk drive cable
•One IDE driver diskette
•Five spare jumpers
If any of these items are missing or damaged, please contact your
dealer or sales representative for assistance.

9
Chapter 2
Hardware Installation
This chapter summarizes the steps to install the 586ITX system board
into your system unit. It also includes a description of the area in which
you must work and directions for memory installation. Before installing
the system board, obtain the memory you plan to install. Refer to the
System Memory section for the number and type of memory modules
needed for the amount of memory you require.
Preparing the Area
Before unpacking the system board, make sure the location you have
selected is relatively free of dust and static electricity. Excessive expo-
sure to dust, static electricity, direct sunlight, excessive humidity, ex-
treme cold, and water can damage the operational capabilities of your
system board. Avoid placing the unit on surfaces such as carpeted
floors. These areas also attract static electricity which can damage
some circuits on your system board.
Make sure the power source has a properly grounded, three-pronged
socket. It is essential that the power connection be properly grounded
for correct functioning of your system board. For further protection, we
recommend that you use a surge suppressor. This will protect the sys-
tem board from damage that may result from a power surge on the
electrical line.
Move items that generate magnetic fields away from your system board
since magnetic fields can also damage your system board. Once you
have selected the ideal location, unpack the 586ITX system board care-
fully.
Handling the System Board
It is quite easy to inadvertently damage your system board even before
installing it in your system unit. Static electrical discharge can damage
computer components without causing any signs of physical damage.
You must take extra care in handling the system board to ensure
against electrostatic build-up.

10
Static Electricity Precautions
1.To prevent electrostatic build-up, leave the board in its anti-static
bag until you are ready to install it.
2.Wear an antistatic wrist strap.
3.Do all preparation work on a static-free surface with the system
board components facing up.
4.Hold the system board by its edges only. Be careful not to touch
any of the components, contacts or connections, especially gold
contacts, on the board.
5.Avoid touching the pins or contacts on all modules and connectors.
Hold modules and connectors by their ends.
Warning:
Electrostatic discharge (ESD) can damage your processor, disk drives,
add-in boards, and other components. Perform the upgrade instruction
procedures described at an ESD workstation only. If such a station is
not available, you can provide some ESD protection by wearing an anti-
static wrist strap and attaching it to a metal part of the system chassis.
If a wrist strap is unavailable, establish and maintain contact with the
system chassis throughout any procedures requiring ESD protection.
Installing the System Board
If you are installing the 586ITX system board, the following outlines the
basic installation steps. Before installing the system board into your sys-
tem unit, you should prepare the tools you will need.
You will need:
•One medium size, flat-bladed screwdriver
•One medium Phillips screwdriver
•One needle-nosed pliers
•One small nutdriver
1.Unlock your system unit. Turn off the power and disconnect all
power cords and cables.

11
2.Remove the system unit cover. Refer to the manufacturer’s instruc-
tions if necessary.
3.Detach all connectors from the old system board and remove ex-
pansion cards seated in any expansion slots.
4.Loosen the screws holding the original system board and remove
the board from the system. Save the screws.
5.Remove the 586ITX from its original packing box. Be careful to
avoid touching all connectors and pins on the board. Please refer to
the handling instructions on pages 9-10 for proper handling tech-
niques.
6.Insert the memory modules into the memory banks on the 586ITX. The
quantity and location of the memory modules depends on the
memory configuration and type of modules you intend to use.
7.Install the CPU. Be sure pin 1 of the CPU is aligned with pin 1 of
the socket.
8.Set the corresponding jumpers.
9.Install the prepared 586ITX system board into the case and replace
the screws.
10.Reinstall all cards and connectors and replace the system unit
cover. Reconnect all power cords and cables.
To use an ATX power supply, install
the 20-pin ATX power cable con-
nector into location CN8 on the sys-
tem board. The 20-pin connector
can be inserted into CN8 only if pin
1 of the connector is aligned with
pin 1 of CN8.

12
Board Layout
square denotes pin 1

13
Sockets
DM0 and DM1 - DIMM sockets
SM1 to SM4 - SIMM sockets
U1 - ZIF socket
Expansion slots
PCI Slots 1, 2, 3, 4 - 32-bit PCI slots
ISA Slots 1, 2, 3, 4 - 16-bit ISA slots
pages 14-15
pages 15-17
pages 22-24
Refer to
page 34
page 34
Refer to
Jumpers
JP1, JP2, JP13, JP15 and JP20
Intel and AMD processors
JP7 - CMOS clear
JP21 - Modem Ring-in select
JP4, JP14, JP18, JP22 and JP23
Factory Testing Jumpers
pages 20-21
page 26
page 26
page 27
Refer to
CN1-COM 1 serial port
CN2-Floppy disk drive connector
CN3-COM 2 serial port
CN4-IrDA connector
CN5-PS/2 keyboard port
CN6-PS/2 mouse port
CN7-Parallel printer port
CN8-ATX power connector
J7-Primary IDE HDD connector
J8-Secondary IDE HDD connector
J10-Keylock connector
Speaker connector
Reset switch connector
SMI switch connector
Power switch connector
Green LED connector
HDD LED connector
ATX LED connector
Connectors - refer to pages 71-73
JP8-USB 1 connector
JP9-USB 2 connector
JP19-Fan controller

14
System Memory
The 586ITX system board supports two kinds of memory modules:
DIMM and SIMM. DIMM, which uses SDRAM, performs better than
SIMM, which uses DRAM. Refer to page 12 for the locations of the DIM
and SIM sockets.
Important:
DIM and SIM modules can not exist on the 586ITX system board at the
same time. Use either SIMM or DIMM only.
DIMM
The two 168-pin DIMM (Dual In-line Memory Module) sockets use x64
EDO, FPM and SDRAM. The 586ITX system board can support 8MB to
32MB memory using 1MBx64, 2MBx64 or 4MBx64 DIMM. The table
below shows the supported DIM modules and their corresponding
memory sizes.
DIMMs
1MBx64
2MBx64
4MBx64
Memory Size
8MB
16MB
32MB
The table below summarizes the DIMM sockets and modules needed
for the corresponding memory sizes.
Memory Size
8MB
8MB
16MB
16MB
16MB
24MB
24MB
32MB
DIM 0
1MBx64
none
2MBx64
none
1MBx64
1MBx64
2MBx64
4MBx64
DIM 1
none
1MBx64
none
2MBx64
1MBx64
2MBx64
1MBx64
none
Memory Size
32MB
32MB
40MB
40MB
48MB
48MB
64MB
DIM 0
none
2MBx64
1MBx64
4MBx64
2MBx64
4MBx64
4MBx64
DIM 1
4MBx64
2MBx64
4MBx64
1MBx64
4MBx64
2MBx64
4MBx64

15
SIMM
The SIMM (Single In-line Memory Module) sockets are divided into two
banks on the system board, Bank 0 and Bank 1. Each bank consists of
2 SIMM sockets.
You will need either 2 or 4 pieces of SIM modules, depending on the
amount of memory you intend to install. The system board will not work
if you install 1 or 3 pieces. Make sure you insert the same type of
SIMMs in one bank. You can install SIMMs in either of the banks, Bank
0 or Bank 1, but you must populate one bank first before going to the
next bank.
The 586ITX system board can support 8MB to 256MB of memory using
1MBx32, 2MBx32, 4MBx32, 8MBx32, or 16MBx32 72-pin SIMMs. The
table on the next page shows the supported SIM modules and their
corresponding memory sizes.
Installing the DIM Module
A DIM module simply snaps into a socket on the system board. Pin 1 of
the DIM module must correspond with pin 1 of the socket.
1.Pull the “tabs” which are at the ends of the socket to the side.
2.Position the DIMM above the socket with the “notches” in the mod-
ule aligned with the “keys” on the socket.
3.Seat the module vertically into the socket. Make sure it is com-
pletely seated. The tabs will hold the DIMM in place.
Pin 1
Notch
KeyTab
Tab

16
The table below summarizes the bank locations and modules needed
for the corresponding memory sizes.
SIMMs
1MBx32
2MBx32
4MBx32
8MBx32
16MBx32
Memory Size
4MB
8MB
16MB
32MB
64MB
SIMM3
—
1MBx32
—
2MBx32
1MBx32
2MBx32
1MBx32
—
4MBx32
2MBx32
4MBx32
1MBx32
4MBx32
2MBx32
—
8MBx32
4MBx32
8MBx32
1MBx32
8MBx32
2MBx32
SIMM2
1MBx32
—
2MBx32
—
1MBx32
1MBx32
2MBx32
4MBx32
—
2MBx32
1MBx32
4MBx32
2MBx32
4MBx32
8MBx32
—
4MBx32
1MBx32
8MBx32
2MBx32
8MBx32
MemorySize
8MB
8MB
16MB
16MB
16MB
24MB
24MB
32MB
32MB
32MB
40MB
40MB
48MB
48MB
64MB
64MB
64MB
72MB
72MB
80MB
80MB
Bank0
SIMM1
1MBx32
—
2MBx32
—
1MBx32
1MBx32
2MBx32
4MBx32
—
2MBx32
1MBx32
4MBx32
2MBx32
4MBx32
8MBx32
—
4MBx32
1MBx32
8MBx32
2MBx32
8MBx32
SIMM4
—
1MBx32
—
2MBx32
1MBx32
2MBx32
1MBx32
—
4MBx32
2MBx32
4MBx32
1MBx32
4MBx32
2MBx32
—
8MBx32
4MBx32
8MBx32
1MBx32
8MBx32
2MBx32
Bank1

17
SIMM1
4MBx32
8MBx32
16MBx32
—
8MBx32
1MBx32
16MBx32
2MBx32
16MBx32
4MBx32
16MBx32
8MBx32
16MBx32
16MBx32
MemorySize
Bank0
SIMM2SIMM4
Bank1
SIMM3
96MB
96MB
128MB
128MB
128MB
136MB
136MB
144MB
144MB
160MB
160MB
192MB
192MB
256MB
4MBx32
8MBx32
16MBx32
—
8MBx32
1MBx32
16MBx32
2MBx32
16MBx32
4MBx32
16MBx32
8MBx32
16MBx32
16MBx32
8MBx32
4MBx32
—
16MBx32
8MBx32
16MBx32
1MBx32
16MBx32
2MBx32
16MBx32
4MBx32
16MBx32
8MBx32
16MBx32
8MBx32
4MBx32
—
16MBx32
8MBx32
16MBx32
1MBx32
16MBx32
2MBx32
16MBx32
4MBx32
16MBx32
8MBx32
16MBx32
1.Position the SIMM above the socket with the “notch” in the module
aligned with the “key” on the socket.
2.Seat the module at a 45° angle into the bank. Make sure it is com-
pletely seated. Tilt the module upright until it locks in place in the
socket.
Installing a SIM Module
A SIM module simply snaps into a socket on the system board. Pin 1 of
the SIM module must correspond with Pin 1 of the socket.
notch
key

18
Cache Memory
The 586ITX system board can sup-
port 512KB pipeline burst, direct
map write-back cache SRAM. Your
system board may come with
512KB cache, which is the maxi-
mum cache memory supported by
the system board, mounted at loca-
tions U5 and U6. One SRAM is
mounted on location U7 for tag
SRAM to store the cacheable ad-
dresses.
Processor Installation
The 586ITX allows for easy installa-
tion of processors. Make sure all
jumpers are set correctly before ap-
plying power or you may damage the
processor or system board. Use a
needle-nosed plier to move the jump-
ers if necessary.
Jumper JP20 is used to set the exter-
nal bus clock of your processor. Re-
fer to the following pages for the
external bus clock that corresponds to your processor and set this jumper
accordingly. The clock generator will determine the external bus clock that
must be sent to the processor through this setting.
Jumper JP1 and JP2 are used to set the frequency ratio of your processor.
Refer to the following pages for the frequency ratio that corresponds to your
processor and set these jumpers accordingly.
After setting these jumpers, an Intel processor will multiply the external bus
clock by the frequency ratio to become the internal clock speed. Internal

19
clock speed is the commonly used speed of Intel processors in the market
and is the actual operating clock of the processor (external bus clock x
frequency ratio = internal clock speed).
AMD processors use the PR-rating system which is the overall processor
performance rating. Under the system, these processors slightly outperform
Intel’s Pentium processors.
Jumpers JP13 and JP15 are used to set the voltage of your processor.
Make sure these jumpers are set correctly, otherwise your system will hang.
The table below shows the External System Bus Clock of the CPUs sup-
ported by the system board and their corresponding PCI Clock and ISA Bus
Clock.
External System Bus Clock
60MHz
66MHz
PCI Clk
30MHz
33MHz
ISA Bus Clk
7.5MHz
8.25MHz

20
Jumper Settings for IntelProcessors
Chipset Voltages
3.5V
3.3V*
JP15
1-2 On
3-4 On
* Default
4
2
3
1
JP15
* Default
Core Voltages
3.2V
2.8V
2.9V
3.3V*
3.5V
JP13
9-10 On
7-8 On
5-6 On
3-4 On
1-2 On
1 2
9
JP13
10
Intel®Processors
90/100MHz/MMX-233MHz
120/133MHz
150/166MHz/MMX-166MHz
200MHz/MMX-200MHz
Freq. Ratio
1.5x
2x
2.5x
3x
JP2
1-2 On
1-2 On
2-3 On
2-3 On
JP1
1-2 On
2-3 On
2-3 On
1-2 On
JP1JP2
Intel®Processors
90/120/150MHz
100/133/166/200MHz
MMX-166/200/233MHz
Ext. System
Bus Clk
60MHz
66MHz
JP20
1-2 On
1-2 Off
JP20