DFI C586HX User manual

C586HX
Rev. D+
System Board
User’s Manual
-C30161005-

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-K5 CPUs..................................19
Installing Upgrade CPUs................................................20
Installing Fan/Heatsink for Cyrix CPUs..............................22
Jumper Settings for CMOS Clear..........................................23
Jumper Settings for Display..................................................23
Built-in Ports.....................................................................24
Serial Ports.................................................................24
PS/2 Mouse Port..........................................................24
Parallel Port ................................................................25
Floppy Disk Drive Controller...........................................25
IDE Hard Disk Interface.................................................26
Universal Serial Bus Connectors......................................28
Installing Expansion Cards...................................................29
Chapter 3: Software Installation...............................................30
Award BIOS CMOS Setup Utility...........................................30
Standard CMOS Setup..................................................31
BIOS Features Setup....................................................35
Chipset Features Setup.................................................39
Power Management Setup.............................................40
PNP/PCI Configuration Setup..........................................42
Load BIOS Defaults......................................................44

4
Load Setup Defaults.....................................................44
Integrated Peripherals...................................................45
Supervisor Password....................................................47
User Password............................................................48
IDE HDD Auto Detection................................................48
HDD Low Level Format .................................................51
Save & Exit Setup........................................................52
Exit Without Saving.......................................................52
System Error Report ..........................................................52
Driver Installation...............................................................54
Chapter 4: Troubleshooting Checklist.............................................55
Appendix A: Types of Modules......................................................59
Appendix B: Memory and I/O Maps................................................60
Appendix C: Connectors..............................................................62

5
The C586HX, 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 C586HX also supports
Cyrix P120+/P133+/P150+/P166+ and AMD-K5 PR75/PR90/PR100
CPUs.
The C586HX 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 check-
ing which informs the user of memory failure and prevents error accu-
mulation. The system board also supports 256KB or 512KB pipeline
burst SRAM and provides easy cache upgrades using a 256KB cache
module.
The C586HX design is based on the Peripheral Component Intercon-
nect (PCI) local bus and Industry Standard Architecture (ISA) stan-
dards. It is equipped with 3 dedicated PCI slots, 3 dedicated 16-bit ISA
slots and 1 shared PCI/ISA slot.
The C586HX board has two bus master PCI IDE connectors. Bus mas-
tering reduces CPU use during disk transfer. This system board is also
equipped with two NS16C550A-compatible serial ports, an SPP/ECP/
EPP parallel port, a floppy disk drive controller, one PS/2 mouse port,
one PS/2 or AT keyboard connector, two USB connectors and one IrDA
header for wireless connectivity between your computer and peripheral
devices.
Chapter 1
Introduction

6
Features and Specifications
Processor
•IntelPentium75/90/100/120/133/150/166/200MHz
•Future PentiumOverDrive processor
•CyrixP120+/P133+/P150+/P166+
•AMD-K5™ PR75/PR90/PR100
•Dual voltage CPUs supported (Multimedia Accelerated CPUs -
MMX)
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 onboard memory
•Four 72-pin SIMM sockets
•Uses EDO or fast page mode x32 or x36 DRAM, 60 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
Energy Efficient Design
•System power management supported
•CPU stopped clock control
•Hardware supports SMI green mode
•Microsoft/Intel APM compliant
•External power management switch 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
•SMC 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)
•Supports future low-voltage CPUs
Connectors
•2 Universal Serial Bus connectors
•1 IrDA TX/RX connector
•2 serial ports
•1 parallel port
•2 IDE connectors
•1 floppy connector
•1 PS/2 mouse port
•1 PS/2 or AT keyboard connector
Expansion Slots
•3 dedicated PCI slots
•3 dedicated 16-bit ISA slots
•1 shared PCI/ISA slot
PCB
•4 layers, Baby AT form factor
•25cm (9.84") x 22cm (8.66")

8
Package Checklist
The C586HX package contains the following items:
•The C586HX system board
•The C586HX user’s manual
•Serial, mouse and printer port cables
Option 1:
-One card-edge bracket with a 9-pin and 25-pin serial port cables
-One card-edge bracket with a 25-pin printer port cable and a PS/2
mouse port cable
Option 2:
-One card-edge bracket with two 9-pin serial port cables and a
PS/2 mouse port cable
-One 25-pin printer port cable for chassis mounting
•One 40-pin IDE hard disk cable
•One 34-pin floppy disk drive cable
•One IDE driver diskette
•Five jumper caps
•One card-edge bracket with two USB port cables (optional)
•Cache module (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 C586HX 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 SIM 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 attract static electricity which can damage 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 C586HX system board
carefully.
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 only by its edges. 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 C586HX 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 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 of the expansion slots.
4.Loosen the screws holding the original system board and remove
the board from the system. Save the screws.
5.Remove the C586HX 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 SIMMs into the SIMM banks on the C586HX. The quan-
tity and location of the SIMMs depends on the memory configura-
tion and type of modules you intend to use.
7.Insert the cache module, if any, into the cache module slot on the
C586HX. 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 C586HX system board into the case and re-
place the screws.
11.Reinstall all cards and connectors and replace the system unit
cover. Reconnect all power cords and cables.

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 C586HX system board can support 8MB to 256MB of memory us-
ing 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
SIMM1
1MBx32/x36
—
2MBx32/x36
—
1MBx32/x36
1MBx32/x36
2MBx32/x36
The table below summarizes the bank locations and modules needed
for the corresponding memory sizes.
MemorySize
8MB
8MB
16MB
16MB
16MB
24MB
24MB
Bank0
SIMM2
1MBx32/x36
—
2MBx32/x36
—
1MBx32/x36
1MBx32/x36
2MBx32/x36
SIMM4
—
1MBx32/x36
—
2MBx32/x36
1MBx32/x36
2MBx32/x36
1MBx32/x36
Bank1
SIMM3
—
1MBx32/x36
—
2MBx32/x36
1MBx32/x36
2MBx32/x36
1MBx32/x36

14
SIMM3
—
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
SIMM2
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
SIMM1
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
SIMM4
—
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
Cache Memory
The C586HX 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 U22 and U23 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). Refer to page 12 for the loca-
tions of the SRAMs and cache module slot. If your system board is
mounted with 512KB cache, which is the maximum cache memory sup-
ported by the system board, the cache module slot will not be installed
on the system board.
Warning:
We highly recommend that you use the T2BSM32-256 cache module. If
you are using a cache module other than the one recommended above,
make sure your cache module meets the Intel COAST 2.x specification.
Severe damage might occur on the cache module or system board if
you insert modules other than those specified above.
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.
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.
notch
key

16
CPU Installation
The C586HX 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 C586HX 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).
See page 12 for the location. Position 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.
Note:
With the cache module installed in the cache module slot, the compo-
nents on the solder side of the add-in card in PCI Slot 4 must not pro-
trude more than 5mm.
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
2
4
1
3
JP9
6
251 JP20
1
2
3
4
JP12
JP7 4
3
2
1
JP21
6
251 JP10
Warning: The default setting of JP9, JP10, JP20 and JP21 is 3.3V. If the voltage of your CPU is not 3.3V, make sure you set JP9, JP10, JP20 and JP21 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
JP7
1-2 On, 3-4 On 1-2 On, 3-4 Off 1-2 Off, 3-4 On
Voltages 2.5V 2.8V 2.9V 3.3V* (VR/STD) 3.5V (VRE)
JP9
3-4 On 3-4 On 3-4 On 3-4 On 1-2 On
JP10
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
JP20
1-2 On 3-4 On 5-6 On 3-4 On 3-4 On
JP21
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
JP12
1-2 Off, 3-4 Off 1-2 On, 3-4 Off
1-2 On, 3-4 On
1-2 Off, 3-4 On
4
3
2
1

18
Jumper Settings for Cyrix CPUs
2
4
JP9
6
251 JP20
1
2
3
4
JP12
6
251 JP10
Cyrix CPUs P120+/P133+/ P150+/P166+
Freq. Ratio
2x JP12
1-2 On, 3-4 Off
Warning: The default setting of JP9, JP10, JP20 and JP21 is 3.3V. If the voltage of your CPU is not 3.3V, make sure you set JP9, JP10, JP20 and JP21 according to the voltage of your CPU, otherwise, your system will hang.
Voltages
2.5V 2.8V 2.9V 3.3V* 3.5V
JP9
3-4 On 3-4 On 3-4 On 3-4 On 1-2 On
JP10
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
JP20
1-2 On 3-4 On 5-6 On 3-4 On 3-4 On
JP21
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
Cyrix CPUs
P120+ P133+ P150+ P166+
Ext. Bus
CLK
50MHz 55MHz 60MHz 66MHz
JP7
1-2 On, 3-4 On
1-2 Off, 3-4 Off
1-2 On, 3-4 Off 1-2 Off, 3-4 On
JP7 4
3
2
1
JP21
4
3
2
1
1
3

19
Jumper Settings for AMD-K5 CPU
2
4
JP9
6
25
1JP20
1
2
3
4
JP12
6
25
1JP10
Warning: The default setting of JP9, JP10, JP20 and JP21 is 3.3V. If the voltage of your CPU is not 3.3V, make sure you set JP9, JP10, JP20 and JP21 according to the voltage of your CPU, otherwise, your system will hang.
Voltages
2.5V 2.8V 2.9V 3.3V* 3.5V
JP9
3-4 On 3-4 On 3-4 On 3-4 On 1-2 On
JP10
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
JP20
1-2 On 3-4 On 5-6 On 3-4 On 3-4 On
JP21
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
AMD-K5 CPUs PR75 75MHz PR90 90MHz PR100 100MHz
Freq. Ratio
1.5x JP12
1-2 Off, 3-4 Off
AMD-K5 CPUs PR75 75MHz PR90 90MHz PR100 100MHz
Ext. Bus
CLK
50MHz 60MHz 66MHz
JP7
1-2 On, 3-4 On 1-2 On, 3-4 Off 1-2 Off, 3-4 On JP7 4
3
2
1
JP21
4
3
2
1
1
3

20
Installing Upgrade CPUs
The C586HX is equipped with a 321-pin Zero Insertion Force (ZIF)
socket at location U27 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