DFI PB50-ZX User manual

PB50-BX/ZX
Rev. AA+
System Board
Users Manual
37110912

Copyright
This publication contains information that is protected by copyright. No
part of it may be reproduced in any form or by any means or used to
make any transformation/adaptation without the prior written permission
from the copyright holders.
This publication is provided for informational purposes only. The
manufacturer makes no representations or warranties with respect to
the contents or use of this manual and specifically disclaims any express
or implied warranties of merchantability or fitness for any particular purpose.
The user will assume the entire risk of the use or the results of the use of
this document.Further,the manufacturer reserves the right to revise this
publication and make changes to its contents at any time, without obligation
to notify any person or entity of such revisions or changes.
© 1999.All Rights Reserved.
Trademarks
Microsoft®MS-DOS®, WindowsTM, Windows®95 and Windows®98
are registered trademarks of Microsoft Corporation. Intel®, Pentium®
II, Pentium®III and CeleronTM are registered trademarks of Intel
Corporation. Award is a registered trademark of Award Software,
Inc. Other trademarks and registered trademarks of products
appearing in this manual are the properties of their respective
holders.
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 battery manufacturers
instructions.

FCC and DOC 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 tr y 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.

Table of Contents
Chapter 1 - Introduction
1.1 Features and Specifications..................................................................................
1.2 Package Checklist.........................................................................................................
Chapter 2 - Hardware Installation
2.1 System Board Layout .............................................................................................
2.2 System Memory.............................................................................................................
2.3 DIP Switch Settings for Processors............................................................
2.4 Jumper Settings for the CPUs Front Side Bus................................
2.5 Jumper Settings for Clearing CMOS Data..........................................
2.6 Jumper Settings for Wake-On-Keyboard/Wake-On-Mouse......
2.7 Connecting the Ribbon Cables and Wires of the Ports
and Connectors.............................................................................................................
Chapter 3 - Award BIOS Setup Utility
3.1 The Basic Input/Output System.....................................................................
3.1.1 Standard CMOS Setup....................................................................
3.1.2 BIOS Features Setup..........................................................................
3.1.3 Chipset Features Setup....................................................................
3.1.4 Power Management Setup............................................................
3.1.5 PNP/PCI Configuration....................................................................
3.1.6 Load Fail-Safe Settings......................................................................
3.1.7 Load Optimal Settings......................................................................
3.1.8 Integrated Peripherals.........................................................................
3.1.9 Supervisor Password..........................................................................
3.1.10 User Password.........................................................................................
3.1.11 IDE HDD Auto Detection...........................................................
3.1.12 Save & Exit Setup.................................................................................
3.1.13 Exit Without Saving..............................................................................
Chapter 4 - Supported Softwares
4.1 Desktop Management Interface.....................................................................
4.2 Hardware Doctor Utility........................................................................................
4.3 Patch Utility for Windows 95...........................................................................
6
11
32
32
35
39
43
48
49
50
50
54
55
55
56
56
12
14
15
16
17
18
19
57
60
62

63
63
65
Appendix A - System Error Messages
A.1 POST Beep.......................................................................................................................
A.2 Error Messages..............................................................................................................
Appendix B - Troubleshooting
B.1 Troubleshooting Checklist....................................................................................

Introduction
1
6
1.1 Features and Specifications
1.1.1 Features
Chipset
 Intel

440BX AGPset (PB50-BX)
Intel

440ZX-100 AGPset (PB50-ZX)
Processor
The system board is equipped with a 242-pin Slot 1 processor slot
for installing an Intel Pentium

II/III processor that is packaged in an
SEC (Single Edge Contact) cartridge or an Intel CeleronTM processor.
It is also equipped with a switching voltage regulator that
automatically detects 1.30V to 3.5V.
 450/100MHz or 500/100MHz Pentium®III processor
 233/66MHz, 266/66MHz, 300/66MHz, 333/66MHz, 350/100MHz,
400/100MHz or 450/100MHz Pentium®II processor
 266/300/300A/333/366/400/433MHz CeleronTM processor
(SEPP for Slot 1)
System Memory
 PB50-BX
- 16MB to 384MB memory using unbuffered DIMMs
- 32MB to 768MB memory using registered DIMMs
- Three 168-pin DIMM sockets
- Uses x64 or x72 PC SDRAM, 3.3V
: PC-66 SDRAM DIMM for 66MHz FSB processors
: PC-100 SDRAM DIMM for 100MHz FSB processors
- ECC supported (uses x72 PC SDRAM DIMM)
 PB50-ZX
- 16MB to 256MB memory using unbuffered DIMMs
- Two 168-pin DIMM sockets
- Uses x64 PC SDRAM, 3.3V
: PC-66 SDRAM DIMM for 66MHz FSB processors
: PC-100 SDRAM DIMM for 100MHz FSB processors
Chapter 1 - Introduction

1
Introduction
7
Expansion Slots
The system board is equipped with 1 dedicated AGP slot. AGP is an
interface designed to support high performance 3D graphics cards. It
utilizes a dedicated pipeline to access system memory for texturing,
z-buffering and alpha blending; delivering up to 533MB/sec.
bandwidth for 3D graphics applications. AGP in this system board
will deliver faster and better graphics with your PC.
The system board is also equipped with 3 dedicated PCI slots, 1
dedicated 16-bit ISA slot and 1 shared PCI/ISA slot. All PCI and
ISA slots are bus masters.
Desktop Management Interface (DMI)
The system board comes with a DMI 2.0 built into the BIOS. The
DMI utility in the BIOS automatically records various information
about your system configuration and stores these information in the
DMI pool, which is a part of the system board's Plug and Play
BIOS. DMI, along with the appropriately networked software, is
designed to make inventory, maintenance and troubleshooting of
computer systems easier. Refer to Chapter 4 for instructions on
using the DMI utility.
Connectors
 2 connectors for external USB por ts
 1 connector for IrDA interface
 2 serial por ts
 1 parallel por t
 2 IDE connectors
 1 floppy connector
 1 PS/2 mouse port
DIMMs
2MBx64/x72
4MBx64/x72
8MBx64/x72
16MBx64/x72
32MBx64/x72
Memory Size
16MB
32MB
64MB
128MB
256MB*
*Supported only when PB50-BX
uses registered DIMMs.
DIMMs
2MBx64
4MBx64
8MBx64
16MBx64
Memory Size
16MB
32MB
64MB
128MB
PB50-ZX
PB50-BX

Introduction
1
8
 1 PS/2 or AT keyboard port
 1 20-pin ATX power supply connector
 1 12-pin standard AT power supply connector
 1 Wake-On-LAN connector
 1 SB-LINK connector
 3 fan connectors for CPU, chassis and AGP fans
PCI Bus Master IDE Controller
 Two PCI IDE interfaces suppor t up to four IDE devices
 Ultra DMA/33 - Synchronous Ultra DMA mode provides data
transfer rate up to a maximum of 33MB/sec, which is twice the
data transfer rate of Enhanced IDE or ATA-2. This enables the
CPU to operate more efficiently when handling simultaneous
events.
 PIO Mode 3 and Mode 4 Enhanced IDE (data transfer rate up
to 16.6MB/sec.)
 Bus mastering reduces CPU utilization during disk transfer
 Supports ATAPI CD-ROM, LS-120, ZIP and SCSI sequential
boot-up
IrDA Interface
The system board is equipped with an IrDA connector for wireless
connectivity between your computer and peripheral devices. It
supports peripheral devices that meet the IrDA or ASK IR standard.
USB Ports
The system board is equipped with a connector for external USB
ports. USB allows data exchange between your computer and a
wide range of simultaneously accessible external Plug and Play
peripherals.
BIOS
 Award BIOS, Windows

95/98 Plug and Play compatible
 Flash EPROM for easy BIOS upgrades
 2MB flash memory

1
Introduction
9
1.1.2 System Health Monitor Functions
The system board is capable of monitoring the following system
health conditions.
 Monitors processor/system temperature and processor overheat
alarm
 Monitors 1.5V/3.3V/±5V/±12V/VCORE voltages and failure
alarm
 Monitors processor/chassis fan speed and failure alarm
 Automatic processor/chassis fan control
 Read back capability that displays temperature, voltage and fan
speed
1.1.3 Intelligence
Automatic CPU/Chassis Fan Off
The CPU and chassis fans will automatically turn off once the system
enters the Suspend mode.
Dual Function Power Button (ATX power supply only)
Depending on the setting in the BIOS setup, this switch will allow
the system to enter the Soft-Off or Suspend mode.
External Modem Ring-on (ATX power supply only)
The Modem Ring-on feature allows the system that is in the
Suspend mode or Soft Power Off mode to wake-up/power-on to
respond to incoming calls.
Note:
This feature supports external modem only.
RTC Timer to Power-on the System (ATX power supply only)
The RTC installed on the system board allows your system to
automatically power-on on the set date and time.

Introduction
1
10
Wake-On-LAN Ready (ATX power supply only)
The Wake-On-LAN function allows the network to remotely wake
up a Soft Power Down (Soft-Off) PC.Your LAN card must support
the remote wakeup function.
Important:
The 5VSB power source of your power supply must support
≥ 720mA (minimum).
Wake-On-Keyboard/Wake-On-Mouse (ATX power supply only)
This function allows you to use the keyboard or mouse to power-on
the system. Refer to Jumper Settings for Wake-On-Keyboard/Wake-
On-Mouse in Chapter 2 and Keyboard/Mouse Power On in the
Integrated Peripherals setup of the Award BIOS in Chapter 3 for
more information.
Important:
 The power button will not function once a keyboard
password has been set in the KB Power On Password
field of the Integrated Peripherals setup. You must type the
correct password to power-on the system.
 The 5VSB power source of your power supply must
support ≥ 720mA (minimum).
ACPI (ATX power supply only)
The system board is designed to meet the ACPI (Advanced
Configuration and Power Interface) specification. ACPI has energy
saving features that enables PCs to implement Power Management
and Plug-and-Play with operating systems that support OS Direct
Power Management.
Virus Protection
Most viruses today destroy data stored in hard drives. The system
board is designed to protect the boot sector and partition table of
your hard disk drive.

1
Introduction
11
1.2 Package Checklist
The system board package contains the following items:
þThe system board
þA users manual
þSerial, 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
þOne 40-pin IDE hard disk cable
þOne 34-pin floppy disk drive cable
þOne CD
¨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.

2
12
Hardware Installation
2.1 System Board Layout
Chapter 2 - Hardware Installation
PB50-BX

2
Hardware Installation
13
PB50-ZX
Note:
The illustrations on the following pages are based on the PB50-BX
system board, which is the board equipped with three DIMM sockets.

2
14
Hardware Installation
2.2 System Memory
PB50-BX is equipped with
three DIMM sockets and
PB50-ZX is equipped with two
DIMM sockets. The 168-pin
DIMM (Dual In-line Memory
Module) sockets support PC
SDRAM DIMM, 3.3V. PC
SDRAM (Synchronous Dynamic
Random Access Memory) is a
fast memory interface
technology that includes using
the clock on the chip to
synchronize with the CPU clock so that the timing of the memory
chips and the timing of the CPU are synchronized. This saves time
during transmission of data, subsequently increasing system
performance.
The PB50-BX system board supports the ECC (Error Checking and
Correction) function.To use this function, you must install DIMM that
supports parity. That is, DIMM that typically has 9 memory chips per
side. This kind of module has 8 standard memory chips and a parity
chip. DIMM with no parity has 8 standard memory chips only. Refer
to chapter 1 (System Memory section) for detailed specification of
the memory supported by your system board.
Pin 1
Notch
Key
Tab
Tab
2.2.1 Installing the DIM Module
A DIM module simply snaps into a DIMM socket on the system
board. Pin 1 of the DIM module must correspond with Pin 1 of the
socket.

2
Hardware Installation
15
2.3 DIP Switch Settings for Processors
The table on the next page shows the supported processors and
their corresponding DIP switch settings (SW1).There are 4 switches
on SW1.The black rectangle in the diagram denotes the part that is
protruding, the adjustable switch. Make sure SW1 is set correctly
before applying power, otherwise you will not be able to power-on
the system.
In the example above:
Switch 1: Off
Switch 2: Off
Switch 3: On
Switch 4: On
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
module aligned with the keys on the socket.
3. Seat the module vertically into the socket. Make sure it is
completely seated. The tabs will hold the DIMM in place.

2
16
Hardware Installation
Note:
Intel Pentium

II, Pentium

III and CeleronTM (SEPP) processors support
VID (Voltage Identification). The switching voltage regulator on the system
board will automatically set the voltage regulator according to the voltage
of the processor.
2.4 Jumper Settings for the CPUs Front Side Bus
Jumper JP2
CPUs Front Side Bus Select
The default setting of jumper
JP2 is Auto - the system will
automatically run according to
the FSB of the processor. If you
wish to overclock a 66MHz FSB
processor to 100MHz, set pins
1, 2 and 3 to Off. If you want a
100MHz FSB processor to run
at 66MHz, set pins 2 and 3 to
On. Refer to the figure on the
next page.
Warning:
Overclocking a 66MHz FSB processor to 100MHz will provide
better system performance. However, not all 66MHz FSB
processors are capable of running at 100MHz bus speed.
Therefore, if you are unable to boot your system when set at
100MHz, make sure to set JP2 back to its default setting.
233MHz 350MHz 3.5x
266MHz 400MHz 4x
300MHz 450MHz 4.5x
333MHz 5x
Processor
SW1
66MHz 100MHz
Frequency
Ratio
Future
processor 5.5x
Processor SW1
66MHz 100MHz
Frequency
Ratio
400MHz Future
processor
433MHz Future
processor
Future
processor
Future
processor
Future
processor
Future
processor
6x
6.5x
7x
7.5x
8x
Future
processor
Future
processor
500MHz
366MHz

2
Hardware Installation
17
2.5 Jumper Settings for Clearing CMOS Data
Jumper JP3
Clear CMOS Data
If, for some reason, the CMOS
data becomes corrupted or you
forgot the supervisor/user/
keyboard password, the system
can be reconfigured with the
default values stored in the
ROM BIOS. To load the default
values, power off your system
and unplug the power cord. If
you are using an AT power
supply, you do not need to
unplug the power cord. Set JP3
pins 2 and 3 to On. Wait for a few seconds and set JP3 back to its
default setting, pins 1 and 2 On. You may now plug the power cord
and power-on your system.
2-3 On:
Clear CMOS Data
1-2 On: Normal
(default)
1
2
3
1
2
3
Jumper JP2s settings are shown below.
2-3 On: 66MHz1-2 On: Auto
(default)
1-2-3 Off: 100MHz
1
2
3
1
2
3
1
2
3

2
18
Hardware Installation
2.6 Jumper Settings for Wake-On-Keyboard/
Wake-On-Mouse (ATX power supply only)
Jumper JP1
Wake-On-Keyboard/Wake-On-Mouse
The system board supports the
Wake-On-Keyboard/Wake-On-
Mouse function. This function
allows you to use the keyboard
or mouse to power-on the
system. By default, JP1 is
disabled. To use this function, set
JP1 to 2-3 On. Keyboard/
Mouse Power On in the
Integrated Peripherals setup of
the Award BIOS must be set
accordingly. Refer to chapter 3
for details.
Warning:
1. If JP1 was previously enabled with a password set in the
KB Power On Password field, and now you wish to disable
the Wake-On-Keyboard (password) function, make sure to
set the Keyboard/Mouse Power On field to Disabled prior
to setting JP1 to disabled. You will not be able to boot up
the system if you fail to do so.
2. The power button will not function once a keyboard
password has been set in the KB Power On Password
field of the Integrated Peripherals setup. You must type the
correct password to power-on the system.
3. The 5VSB power source of your power supply must
support ≥ 720mA (minimum).
2-3 On: Enable1-2 On: Disable
(default)
321 321

2
Hardware Installation
19
2.7 Connecting the Ribbon Cables and Wires of
the Ports and Connectors
2.7.1 Serial Ports
The built-in serial ports are RS-232C asynchronous communication
ports with 16C550A-compatible UARTs that can be used with
modems, serial printers, remote display terminals, and other serial
devices. You can set the serial ports I/O address in the Integrated
Peripherals setup of the Award BIOS.
Connecting the Serial Ports
Two serial port cables
mounted on a card-edge
bracket are provided with the
system board. Connect one
serial port cable to connector
J9 for COM 1 primar y serial
port and the other serial port
cable to connector J8 for the
COM 2 secondary serial port.
Make sure the colored stripes
on the ribbon cables are
aligned with pin 1 of
connectors J8 and J9. Mount the card-edge bracket to the system
chassis.

2
20
Hardware Installation
2.7.2 PS/2 Mouse Port
The PS/2 mouse port is a 6-pin connector on the system board.
Attach the 6-pin mouse port cable, which is mounted on a card-
edge bracket, to connector J4. Make sure the red wire on the PS/2
mouse connector is aligned with pin 1 of connector J4. Mount the
card-edge bracket to the system chassis.
The PS/2 mouse port uses IRQ12. If a mouse is not connected to
this port, the system will reserve IRQ12 for other expansion cards.
Warning:
Make sure to turn off your computer prior to connecting or
disconnecting a mouse. Failure to do so may damage the
system board.
Pin
1
2
3
4
5
6
Function
Mouse Data
Reserved
Ground
+5V
Mouse Clock
Reserved