DFI 586IHX User manual

586IHX
Rev.A+
System Board
User’s Manual
- 32361220 -

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 in-
terference 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 in-
stallation. 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 oper-
ate the equipment.
2.Shielded interface cables must be used in order to comply with the
emission limits.
The manufacturer makes no warranties with respect to this documenta-
tion 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 per-
son 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................................................................13
Installing a SIM Module.................................................15
Cache Memory.................................................................15
Installing the Cache Module...........................................16
CPU Installation................................................................16
Jumper Settings for Intel CPUs........................................17
Jumper Settings for Cyrix CPUs......................................18
Jumper Settings for AMD CPUs.......................................19
Installing Upgrade CPUs................................................20
InstallingA Fan/Heatsink for Cyrix CPUs...........................22
Jumper Settings for Display Type...........................................23
Jumper Settings for CMOS Clear..........................................23
Built-in Ports.....................................................................24
Serial Ports.................................................................24
Parallel Port ................................................................24
Floppy Disk Drive Controller...........................................25
IDE Hard Disk Interface.................................................25
Universal Serial Bus Connectors......................................27
Installing Expansion Cards...................................................28
Chapter 3: Software Installation...............................................29
Award BIOS CMOS Setup Utility...........................................29
Standard CMOS Setup..................................................30
BIOS Features Setup....................................................34
Chipset Features Setup.................................................38
Power Management Setup.............................................39
PNP/PCI Configuration..................................................41
Load BIOS Defaults......................................................43
Load Setup Defaults.....................................................43

4
Integrated Peripherals...................................................44
Supervisor Password....................................................46
User Password............................................................47
IDE HDD Auto Detection................................................47
HDD Low Level Format .................................................50
Save & Exit Setup........................................................51
Exit Without Saving.......................................................51
Desktop Management Interface (DMI)....................................51
System Error Report ..........................................................54
IDE Device Drivers.............................................................56
Chapter 4: Troubleshooting Checklist........................................57
Appendix A: Types of Modules................................................61
Appendix B: Memory and I/O Maps..........................................62
Appendix C: Connectors.........................................................64

5
The 586IHX, equipped with a 321-pin Zero Insertion Force (ZIF) CPU
socket, is a Pentiumprocessor-class system board supporting Intel
Pentium CPUs running at 75MHz, 90MHz, 100MHz, 120MHz, 133MHz,
150MHz, 166MHz and 200MHz frequencies. The 586IHX also supports
future Pentium OverDrive processors, Cyrix6x86 and 6x86L P120+/
P133+/P150+/P166+ and AMD-K5 PR75/PR90/PR100/PR120/PR133
CPUs.
The 586IHX supports 8MB to 256MB of system memory using EDO or
fast page mode DRAM. It is equipped with 4 SIMM sockets allowing you
to install x32 or x36 SIMMs. The x36 SIMM supports parity checking
which informs the user of memory failures and prevents error accumula-
tion. The system board also supports 256KB or 512KB pipeline burst
SRAM and provides easy cache upgrades using a 256KB cache
module.
The 586IHX 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, 3 dedicated 16-bit ISA slots and 1
shared PCI/ISA slot.
The 586IHX is equipped with two NS16C550A-compatible serial ports,
an SPP/ECP/EPP parallel port, a floppy disk drive controller, and two
PCI IDE connectors with bus mastering capabilities that highly reduce
CPU use during disk transfer. This system board is also equipped with
one PS/2 mouse port, one PS/2 keyboard port, two connectors for ex-
ternal USB ports and one IrDA connector for wireless connectivity be-
tween your computer and peripheral devices.
The 586IHX 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.
Chapter 1
Introduction

6
Features and Specifications
PROCESSOR
•PentiumProcessor with MMXTechnology - 166/200
•IntelPentium75/90/100/120/133/150/166/200MHz
•Future PentiumOverDrive processor
•Cyrix6x86 and 6x86L P120+/P133+/P150+/P166+
•AMD-K5™ PR75/PR90/PR100/PR120/PR133
CHIPSET
•Intel 82430HX PCIset
CACHE MEMORY
•256KB or 512KB pipeline burst, direct map write-back cache
installed on the system board
-Onboard 256KB: upgradeable with a 256KB cache module for a
maximum of 512KB cache
-Onboard 512KB: maximum cache memory (no cache module slot)
SYSTEM MEMORY
•8MB to 256MB memory
•Four 72-pin SIMM sockets using EDO or fast page mode x32 or x36
DRAM, 60ns or 70ns, 5V
•ECC and Parity Check supported (using x36 DRAM)
BIOS
•Award BIOS, Windows 95 Plug and Play compatible
•Flash EPROM for easy BIOS upgrades
•Supports DMI function
ENERGY EFFICIENT DESIGN
•System power management supported
•CPU stopped clock control
•Hardware supports SMI green mode
•Microsoft/Intel APM compliant
•External power management switch support
•Soft Power supported

7
PCI IDE INTERFACE
•PIO Mode 3 and Mode 4 Enhanced IDE (data transfer rate up to
16.6MB/sec.)
•DMA Mode 2 Bus Master IDE (data transfer rate up to 22.2MB/sec.)
•Bus mastering reduces CPU utilization during disk transfer
•ATAPI IDE CD-ROM supported
INTEGRATED I/O
•Super 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)
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
•1 mini-DIN-6 PS/2 mouse port
•1 mini-DIN-6 PS/2 keyboard port
•One 20-pin ATX power supply connector
•One 12-pin standard AT power supply connector
EXPANSION SLOTS
•3 dedicated PCI slots
•3 dedicated 16-bit ISA slots
•1 shared PCI/ISA slot
PCB
•4 layers, ATX form factor
•30.48cm (12") x 20.8cm (8.2")

8
Package Checklist
The 586IHX package contains the following items:
•The 586IHX system board
•The 586IHX user’s manual
•One 40-pin IDE hard disk cable
•One 34-pin floppy disk drive cable
•One IDE driver diskette
•Five spare jumpers
•One card-edge bracket with two USB ports (optional)
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 586IHX 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 more information.
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 586IHX 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 586IHX 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 586IHX 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 586IHX.
The quantity and location of the memory modules depends on the
memory configuration and type of modules you intend to use.
7.Insert the cache module, if any, into the cache module slot on the
586IHX. Refer to the Cache Memory section for upgrading your
cache memory.
8.Install the CPU. Be sure pin 1 of the CPU is aligned with pin 1 of
the socket.
9.Set the corresponding jumpers.
10.Install the prepared 586IHX system board into the case and replace
the screws.
11.Reinstall all cards and connectors and replace the system unit
cover. Reconnect all power cords and cables.
Use only the ATX or AT power connector, not both. If you are using
an ATX power supply, install the 20-pin ATX power cable connector
into location PL2 on the system board. The 20-pin connector can be
inserted into PL2 only if pin 1 of the connector is aligned with pin 1
of PL2.

12
Board Layout
square denotes pin 1

13
System Memory
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. Refer to page 12 for the locations of the SIMM sockets.
You will need either 2 or 4 pieces of SIM modules, depending on the
amount of memory you intend to install. 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 586IHX system board can support 8MB to 256MB of memory using
1MBx32/x36, 2MBx32/x36, 4MBx32/x36, 8MBx32/x36, or 16MBx32/x36
72-pin SIMMs. The table below shows the supported SIM modules and
their corresponding memory sizes.
SIMMs
1MBx32/x36
2MBx32/x36
4MBx32/x36
8MBx32/x36
16MBx32/x36
Memory Size
4MB
8MB
16MB
32MB
64MB
The table below summarizes the bank locations and modules needed
for the corresponding memory sizes.
SIMM3
1MBx32/x36
—
2MBx32/x36
—
1MBx32/x36
1MBx32/x36
2MBx32/x36
MemorySize
8MB
8MB
16MB
16MB
16MB
24MB
24MB
Bank0
SIMM4
1MBx32/x36
—
2MBx32/x36
—
1MBx32/x36
1MBx32/x36
2MBx32/x36
SIMM2
—
1MBx32/x36
—
2MBx32/x36
1MBx32/x36
2MBx32/x36
1MBx32/x36
Bank1
SIMM1
—
1MBx32/x36
—
2MBx32/x36
1MBx32/x36
2MBx32/x36
1MBx32/x36

14
SIMM1
—
4MBx32/x36
2MBx32/x36
4MBx32/x36
1MBx32/x36
4MBx32/x36
2MBx32/x36
—
8MBx32/x36
4MBx32/x36
8MBx32/x36
1MBx32/x36
8MBx32/x36
2MBx32/x36
8MBx32/x36
4MBx32/x36
—
16MBx32/x36
8MBx32/x36
16MBx32/x36
1MBx32/x36
16MBx32/x36
2MBx32/x36
16MBx32/x36
4MBx32/x36
16MBx32/x36
8MBx32/x36
16MBx32/x36
SIMM4
4MBx32/x36
—
2MBx32/x36
1MBx32/x36
4MBx32/x36
2MBx32/x36
4MBx32/x36
8MBx32/x36
—
4MBx32/x36
1MBx32/x36
8MBx32/x36
2MBx32/x36
8MBx32/x36
4MBx32/x36
8MBx32/x36
16MBx32/x36
—
8MBx32/x36
1MBx32/x36
16MBx32/x36
2MBx32/x36
16MBx32/x36
4MBx32/x36
16MBx32/x36
8MBx32/x36
16MBx32/x36
16MBx32/x36
MemorySize
32MB
32MB
32MB
40MB
40MB
48MB
48MB
64MB
64MB
64MB
72MB
72MB
80MB
80MB
96MB
96MB
128MB
128MB
128MB
136MB
136MB
144MB
144MB
160MB
160MB
192MB
192MB
256MB
Bank0
SIMM3
4MBx32/x36
—
2MBx32/x36
1MBx32/x36
4MBx32/x36
2MBx32/x36
4MBx32/x36
8MBx32/x36
—
4MBx32/x36
1MBx32/x36
8MBx32/x36
2MBx32/x36
8MBx32/x36
4MBx32/x36
8MBx32/x36
16MBx32/x36
—
8MBx32/x36
1MBx32/x36
16MBx32/x36
2MBx32/x36
16MBx32/x36
4MBx32/x36
16MBx32/x36
8MBx32/x36
16MBx32/x36
16MBx32/x36
SIMM2
—
4MBx32/x36
2MBx32/x36
4MBx32/x36
1MBx32/x36
4MBx32/x36
2MBx32/x36
—
8MBx32/x36
4MBx32/x36
8MBx32/x36
1MBx32/x36
8MBx32/x36
2MBx32/x36
8MBx32/x36
4MBx32/x36
—
16MBx32/x36
8MBx32/x36
16MBx32/x36
1MBx32/x36
16MBx32/x36
2MBx32/x36
16MBx32/x36
4MBx32/x36
16MBx32/x36
8MBx32/x36
16MBx32/x36
Bank1

15
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
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.
Cache Memory
The 586IHX system board can support 256KB or 512KB pipeline burst,
direct map write-back cache SRAM. Your system board may come with
256KB or 512KB cache mounted at locations U10 and U19 of the sys-
tem board.
If your system board is mounted with 256KB cache, you may upgrade
your cache memory to 512KB by installing a 256KB cache module in
the 160-pin cache module slot (SSM1). If your system board is mounted
with 512KB cache, which is the maximum cache memory supported by
the system board, the cache module slot will not be installed on the
system board.
Regardless of the amount of cache memory installed, one SRAM is
mounted on location U16 for tag RAM to store the cacheable ad-
dresses. Refer to page 12 for the locations of the SRAMs and cache
module slot.

16
CPU Installation
The 586IHX allows for easy installation of CPUs. Make sure all jumpers are
set correctly before applying power or you may damage the CPU or system
board. Please see the jumper settings on the following pages. Use the
needle-nosed pliers to move the jumpers if necessary. The table below
shows the External Bus Clock of the CPUs supported by the 586IHX sys-
tem board and their corresponding PCI Clock and Bus Clock.
Installing the Cache Module
Locate the 160-pin cache module slot on the system board (SSM1). Po-
sition the cache module above the slot. Make sure pin 1 of the cache
module is aligned with pin 1 of the slot. Carefully slide the module into
the slot. Press firmly on the top of it to seat it properly.
Warning:
We highly recommend that you use the T2BSM32-256 or T3BSM256
cache module. If you are using a cache module other than one recom-
mended above, make sure your cache module meets the Intel COAST
2.x or 3.x specification. Severe damage might occur on the cache mod-
ule or system board if you insert modules other than those specified
above.
External Bus Clock
50MHz
55MHz
60MHz
66MHz
PCI CLK
25MHz
27.5MHz
30MHz
33MHz
Bus CLK
8.333MHz
9.1666MHz
7.5MHz
8.25MHz

17
Jumper Settings for Intel CPUs
* Default
Warning:
The default setting of JP4, JP5, JP6 and
JP9 is 3.3V. If the voltage of your CPU is
not 3.3V, make sure you set JP4, JP5, JP6
and JP9 according to the voltage of your
CPU, otherwise, your system will hang.
Intel CPUs
75MHz
90/120/150MHz
100/133/166/200MHz
Ext. Bus
CLK
50MHz
60MHz
66MHz
JP10
1-2 On, 3-4 On
1-2 On, 3-4 Off
1-2 Off, 3-4 On
Voltages
2.7V
2.8V
2.9V
3.3V*
3.5V
JP4
3-4 On
3-4 On
3-4 On
3-4 On
1-2 On
JP5
1-3, 2-4 On
1-3, 2-4 On
1-3, 2-4 On
3-5, 4-6 On
3-5, 4-6 On
JP6
5-6 On
3-4 On
1-2 On
3-4 On
3-4 On
JP9
1-2, 3-4 Off
1-2, 3-4 Off
1-2, 3-4 Off
1-2, 3-4 On
1-2, 3-4 On
Intel CPUs
75/90/100MHz
120/133MHz
150/166MHz
200MHz
Freq. Ratio
1.5x
2x
2.5x
3x
JP7
1-2 Off, 3-4 Off
1-2 On, 3-4 Off
1-2 On, 3-4 On
1-2 Off, 3-4 On
JP5JP6
JP7
1
32
4
JP10
1
23
4
JP4
1
32
413 5
6
24
1
6
2
3 5
4JP9
4
23
1

18
Jumper Settings for Cyrix 6x86 and 6x86L CPUs
Cyrix CPUs
P120+
P133+
P150+
P166+
Ext. Bus
CLK
50MHz
55MHz
60MHz
66MHz
JP10
1-2 On, 3-4 On
1-2 Off, 3-4 Off
1-2 On, 3-4 Off
1-2 Off, 3-4 On
Cyrix CPUs
P120+/P133+/
P150+/P166+
Freq. Ratio
2xJP7
1-2 On, 3-4 Off
* Default
Warning:
The default setting of JP4, JP5, JP6 and
JP9 is 3.3V. If the voltage of your CPU is
not 3.3V, make sure you set JP4, JP5, JP6
and JP9 according to the voltage of your
CPU, otherwise, your system will hang.
Voltages
2.7V
2.8V
2.9V
3.3V*
3.5V
JP4
3-4 On
3-4 On
3-4 On
3-4 On
1-2 On
JP5
1-3, 2-4 On
1-3, 2-4 On
1-3, 2-4 On
3-5, 4-6 On
3-5, 4-6 On
JP6
5-6 On
3-4 On
1-2 On
3-4 On
3-4 On
JP9
1-2, 3-4 Off
1-2, 3-4 Off
1-2, 3-4 Off
1-2, 3-4 On
1-2, 3-4 On
JP5JP6
JP7
1
32
4
JP10
1
23
4
JP4
1
32 413 5
6
24
1
6
2
3 5
4JP9
4
23
1

19
Jumper Settings for AMD-K5 CPUs
P-Rating/Core MHz
PR75/75MHz
PR90/90MHz
PR100/100MHz
PR120/90MHz
PR133/100MHz
Ext. Bus
CLK
50MHz
60MHz
66MHz
60MHz
66MHz
JP10
1-2 On, 3-4 On
1-2 On, 3-4 Off
1-2 Off, 3-4 On
1-2 On, 3-4 Off
1-2 Off, 3-4 On
P-Rating/Core MHz
PR75/75MHz
PR90/90MHz
PR100/100MHz
PR120/90MHz
PR133/100MHz
Freq. Ratio
1.5xJP7 1-2 Off, 3-4 Off
* Default
Warning:
The default setting of JP4, JP5, JP6 and
JP9 is 3.3V. If the voltage of your CPU is
not 3.3V, make sure you set JP4, JP5, JP6
and JP9 according to the voltage of your
CPU, otherwise, your system will hang.
Voltages
2.7V
2.8V
2.9V
3.3V*
3.5V
JP4
3-4 On
3-4 On
3-4 On
3-4 On
1-2 On
JP5
1-3, 2-4 On
1-3, 2-4 On
1-3, 2-4 On
3-5, 4-6 On
3-5, 4-6 On
JP6
5-6 On
3-4 On
1-2 On
3-4 On
3-4 On
JP9
1-2, 3-4 Off
1-2, 3-4 Off
1-2, 3-4 Off
1-2, 3-4 On
1-2, 3-4 On
JP5JP6
JP7
1
32
4
JP10
1
23
4
JP4
1
32
41 3 5
6
24
1
6
2
3 5
4JP9
4
23
1

20
Installing Upgrade CPUs
The 586IHX is equipped with a 321-pin Zero Insertion Force (ZIF)
socket at location U24 of the system board. Refer to page 12 for the
location of the ZIF socket. This socket is designed for easy removal of
an old CPU and easy insertion of an upgrade CPU. The ZIF socket
allows you to carefully place the new CPU into its position. If you need
to apply excessive force to insert the CPU, you are not installing the
CPU correctly.
Warning:
Open the socket only if you are actually installing a CPU. The warranty
on the original CPU will be voided if the S/N seal is broken. Before
proceeding with the upgrade, take note of the following. The micropro-
cessor and heatsink may be hot if the system has been running. To
avoid the possibility of a burn, power the system off and let the proces-
sor and heatsink cool for 20 minutes.
The 321-pin ZIF socket consists of five rows of pin holes on each side.
To prevent improper CPU installation, the ZIF socket has a Plug/Keying
mechanism. Several holes in the socket are plugged so that the CPU
will go in only one way. If you cannot easily insert the CPU, verify that
pin 1 of the CPU is aligned with pin 1 of the socket.
Zero Insertion Force (ZIF) Socket
To install an upgrade CPU, do the following:
1.Make sure the handle on the side of the ZIF socket is up. To raise
the handle, push it down, slightly pull it out to the side, then raise it
as far as it will go. It may be necessary to initially apply a small