This publication contains the 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.
All Rights Reserved.
Trademarks
Microsoft® MS-DOS®, WindowsTM and Windows® 95 are registered
trademarks of Microsoft Corporation. Intel and Pentium are registered
trademarks of Intel Corporation. Cyrix, 6x86, 6x86L and 6x86MX are
registered trademarks of Cyrix Corporation. AMD, K5 and K6 are
registered trademarks of Advanced Micro Devices, Inc. IBM is a registered
trademark of International Business Machine 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 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.
Table of Contents
Chapter 1 - Introduction
1.1 Features and Specifications...................................................................
The system board is equipped with a 321-pin ZIF socket (Intel
Socket 7). This socket is designed for easy removal of an old
processor and easy insertion of an upgrade processor. The system
board is also equipped with a switching voltage regulator that
supports 2.8V to 3.5V core voltage for various processors.
•Intel Pentium processor with MMXTM technology-166/200/
233MHz
•Intel Pentium 90/100/120/133/150/166/200MHz
•Cyrix 6x86L PR150+/PR166+ and 6x86MX-PR166/PR200
•AMD K5 PR90/PR100/PR120/PR133/PR166
•AMD K6-166, K6-200, K6-233 and future K6 processors
System Memory
The system board supports 8MB to 256MB of memory. It is
equipped with two DIMM and four SIMM sockets. The 168-pin
DIMM sockets use x64 EDO (60/70ns), fast page mode (60/70ns),
or SDRAM (10/12/13ns), 3.3V. The 72-pin SIMM sockets use EDO
or fast page mode, 60/70ns, x32 DRAM, 5V.
Level 2 Cache Memory
•512KB pipeline burst, direct map write-back cache installed on
the system board.
Expansion Slots
The system board is equipped with 4 dedicated PCI slots and 3
dedicated 16-bit ISA slots. All PCI and ISA slots are bus masters.
7
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P5BTX/L System Board User’s Manual
Desktop Management Interface (DMI)
The system board comes with 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.
Onboard I/O
• Two NS16C550A-compatible serial ports
• One SPP/ECP/EPP parallel port
•One floppy drive interface supports up to 2.88MB floppy
drives.
• One PS/2 mouse port
• One PS/2 or AT keyboard port
• One 12-pin standard AT power supply connector
PCI Bus Master IDE Controller
•Two PCI IDE interfaces support up to four IDE devices
•Ultra DMA/33 supported (Synchronous DMA mode - data
transfer rate up to 33MB/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
•LS-120 and ZIP supported
IrDA Interface
The system board is equipped with an IrDA connector for
wireless connectivity between your computer and peripheral
devices.
USB Ports
The system board is equipped with a header for external USB
ports. USB allows data exchange between your computer and a
wide range of simultaneously accessible external Plug and Play
peripherals.
8
Introduction
BIOS
• Award BIOS, Windows 95 Plug and Play compatible
• Flash EPROM for easy BIOS upgrades
Power Supply Connector
The system board is equipped with an AT power supply connector
for connecting an AT power supply.
1.1.2 Technology
SDRAM
Synchronous Dynamic Random Access Memory (SDRAM) is a
DRAM technology that uses 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.
Ultra DMA/33 Bus Master IDE
The system board supports Synchronous Ultra DMA mode that
provides data transfer rate at 33MB/sec, which is double the data
transfer rate of Enhanced IDE or ATA-2. This enables the CPU to
operate more efficiently when handling simultaneous events.
1
1.1.3 Intelligence
RTC Timer to Power On the System
The RTC installed on the system board allows your system to
automatically wake up on the set day and time. Set the day and
time you would like your system to power on in the “Resume By
Alarm” field (Power Management Setup) of the Award BIOS.
9
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P5BTX/L System Board User’s Manual
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. If an attempt is made to write to the
boot sector or partition table of the hard disk drive, the BIOS will
halt the system and an error message will appear. Refer to the
“Virus Warning” field in the BIOS Features Setup section of this
manual (Chapter 3).
1.2 Package Checklist
The system board package contains the following items:
þ The system board
þ A user’s manual
þ 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
þ One 40-pin IDE hard disk cable
þ One 34-pin floppy disk drive cable
þ One utility diskette
þ 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.
10
CHAPTER
Hardware Installation
2
P5BTX/L System Board User’s Manual
2.1 System Board Layout
12
Hardware Installation
2.2 Installation Steps
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 antistatic 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.
The following outlines the basic installation steps prior to installing
the system board into the chassis.
2.2.1 Install the System Memory
2.2.2 Install the Processor
2.2.3 Set the Jumpers on the System Board
2.2.4 Install the Expansion Cards
2
2.2.5 Connect the Ribbon Cables and Wires of the Ports and
Connectors
2.2.6 Install the System Board
2.2.1 Installing System Memory
The system board supports two kinds of memory modules: DIMM
and SIMM. DIMM, which sometimes uses SDRAM, performs better
than SIMM, which uses DRAM. When you are purchasing DIMMs,
please specify you want the Intel compatible type. (There are DIMMs
made for other types of computers that are not compatible.)
Note:
DIM and SIM modules cannot exist on the system board at
the same time. Use either SIMM or DIMM only.
13
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P5BTX/L System Board User’s Manual
2.2.1.1 DIMM
The two 168-pin DIMM
(Dual In-line Memory
Module) sockets use x64
EDO, FPM and SDRAM.
The system board can
support 8MB to 256MB
memory. The table below
summarizes the DIMM
sockets and modules
needed for the corresponding memory sizes.
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.
Notch
2
Tab
Pin 1
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.
Key
2.2.1.2 SIMM
The SIMM sockets are
divided into two banks on
the system board, Bank 0
and Bank 1. Each bank
consists of 2 SIMM sockets.
The system board supports
8MB to 256MB of memory
using 1MBx32, 2MBx32,
4MBx32, 8MBx32 or
16MBx32 72-pin SIMMs
(Single In-line Memory
Module). You will need 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 banks but you must populate one bank first before going
to the next bank.
Tab
15
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P5BTX/L System Board User’s Manual
The following table summarizes the bank locations and modules
needed for the corresponding memory sizes.
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
completely seated. Tilt the module upright until it locks in place in
the socket.
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P5BTX/L System Board User’s Manual
2.2.2 Installing a Processor
The system board is equipped with a 321-pin Zero Insertion Force
(ZIF) socket The ZIF socket is designed for easy removal of an old
processor and easy insertion of an upgrade processor. If you need
to apply excessive force to insert the processor, you are not installing
the processor correctly.
1. To raise the handle of the ZIF socket, 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 amount of sideways force to
free the handle from its retaining “tab”. Once clear of the “tab”,
the handle will open relatively easily. The top plate will slide back.
2. Insert the processor until the pins are in their corresponding
holes. Make sure pin 1 of the processor is aligned with pin 1 of
the socket. To prevent improper processor installation, the ZIF
socket has a Plug/Keying mechanism. Several holes in the socket
are plugged so that the processor will go in only one way.
3. Push the handle down until the handle locks into place. The top
plate will slide forward.
18
Warning:
The processor must be kept cool by using a fan with heatsink.
Otherwise, the processor will overheat and damage the
processor and the system board.
Tab Handle
Pin 1
Hardware Installation
JP1
JP2
JP3
JP8
2.2.2.1 Jumper Settings of the Processors
A processor’s internal clock speed is the actual internal operating
clock of the processor. Its frequency ratio differs from one processor
to another. An Intel processor will multiply the external bus clock by
the frequency ratio to become the internal clock speed. Internal clock
speed is the commonly known 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). Cyrix and
AMD processors use the PR-rating system which is the overall
processor performance rating.
The voltage of the processors are divided into Single voltage and
Dual voltage processors. Single voltage processors include Intel
Pentium, Cyrix 6x86 and AMD K5 processors. Dual voltage
processors include Intel Pentium processors with MMX technology,
Cyrix 6x86L and 6x86MX, and AMD K6 processors. Make sure
all jumpers are set correctly before applying power or you may
damage the processor or system board. Use a needle-nosed plier to
move the jumpers if necessary.
The table below shows the External System Bus Clock of the
processors supported by the system board and their corresponding
PCI Clock and ISA Bus Clock.
2
Ext. System Bus Clock
60MHz
66MHz
JP6
JP7
PCI CLK
30MHz
33MHz
ISA Bus CLK
7.5MHz
8.25MHz
19
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P5BTX/L System Board User’s Manual
Locations of Jumpers JP1-JP3 and JP6-JP8
Jumper Settings for Intel Processors
Processors-Ext. Bus Clk-Ratio
90MHz - 60MHz - 1.5x
100MHz - 66MHz - 1.5x
120MHz - 60MHz - 2x
133MHz - 66MHz - 2x
150MHz - 60MHz - 2.5x
166MHz - 66MHz - 2.5x
200MHz - 66MHz - 3x
MMX166MHz* - 66MHz - 2.5x
MMX200MHz - 66MHz - 3x
MMX233MHz - 66MHz - 3.5x
1-2 On
2-3 Off
1-2 Off
2-3 On
1-2 On
2-3 Off
1-2 Off
2-3 On
1-2 On
2-3 Off
1-2 Off
2-3 On
1-2 Off
2-3 On
1-2 Off
2-3 On
1-2 Off
2-3 On
1-2 Off
2-3 On
JP1
JP2
1-2 Off
2-3 On
1-2 On
2-3 Off
1-2 Off
2-3 On
1-2 On
2-3 Off
1-2 Off
2-3 On
1-2 On
2-3 Off
1-2 On
2-3 Off
1-2 On
2-3 Off
1-2 On
2-3 Off
1-2 On
2-3 Off
Jumper Settings for Cyrix Processors
Processors-Ext. Bus Clk-Ratio
6x86L PR150+ - 60MHz - 2x
6x86L PR166+ - 66MHz - 2x
6x86MX PR166 - 60MHz -
2.5x
6x86MX PR200 - 66MHz -
2.5x
1-2 On
2-3 Off
1-2 Off
2-3 On
1-2 On
2-3 Off
1-2 Off
2-3 On
JP1
JP2
1-2 Off
2-3 On
1-2 On
2-3 Off
1-2 Off
2-3 On
1-2 On
2-3 Off
JP3
1-2 Off
2-3 On
1-2 Off
2-3 On
1-2 Off
2-3 On
1-2 Off
2-3 On
1-2 Off
2-3 On
1-2 Off
2-3 On
1-2 Off
2-3 On
1-2 Off
2-3 On
1-2 Off
2-3 On
1-2 Off
2-3 On
JP3
1-2 Off
2-3 On
1-2 Off
2-3 On
1-2 Off
2-3 On
1-2 Off
2-3 On
JP6
1-2 Off, 3-4 Off,
5-6 On, 7-8 On
1-2 Off, 3-4 Off,
5-6 On, 7-8 On
1-2 Off, 3-4 Off,
5-6 On, 7-8 On
1-2 Off, 3-4 Off,
5-6 On, 7-8 On
1-2 Off, 3-4 Off,
5-6 On, 7-8 On
1-2 Off, 3-4 Off,
5-6 On, 7-8 On
1-2 Off, 3-4 Off,
5-6 On, 7-8 On
1-2 On, 3-4 On,
5-6 Off, 7-8 Off
1-2 On, 3-4 On,
5-6 Off, 7-8 Off
1-2 On, 3-4 On,
5-6 Off, 7-8 Off
JP6
1-2 On, 3-4 On,
5-6 Off, 7-8 Off
1-2 On, 3-4 On,
5-6 Off, 7-8 Off
1-2 On, 3-4 On,
5-6 Off, 7-8 Off
1-2 On, 3-4 On,
5-6 Off, 7-8 Off
JP8
1-2 Off, 3-4 Off,
5-6 Off
1-2 Off, 3-4 Off,
5-6 Off
1-2 On, 3-4 Off,
5-6 Off
1-2 On, 3-4 Off,
5-6 Off
1-2 On, 3-4 On,
5-6 Off
1-2 On, 3-4 On,
5-6 Off
1-2 Off, 3-4 On,
5-6 Off
1-2 On, 3-4 On,
5-6 Off
1-2 Off, 3-4 On,
5-6 Off
1-2 Off, 3-4 Off,
5-6 Off
JP8
1-2 On, 3-4 Off,
5-6 Off
1-2 On, 3-4 Off,
5-6 Off
1-2 On, 3-4 On,
5-6 Off
1-2 On, 3-4 On,
5-6 Off
20
Jumper Settings for AMD Processors
Hardware Installation
2
Processors-Ext. Bus Clk-Ratio
K5 PR90 - 60MHz - 1.5x
K5 PR100 - 66MHz - 1.5x
K5 PR120 - 60MHz - 1.5x
K5 PR133 - 66MHz - 1.5x
K5 PR166 - 66MHz - 1.75x
K6-166 - 66MHz - 2.5x
K6-200 - 66MHz - 3x
K6-233 - 66MHz - 3.5x
K6-266 - 66MHz - 4x
JP1
1-2 On
2-3 Off
1-2 Off
2-3 On
1-2 On
2-3 Off
1-2 Off
2-3 On
1-2 Off
2-3 On
1-2 Off
2-3 On
1-2 Off
2-3 On
1-2 Off
2-3 On
1-2 Off
2-3 On
1-2 Off
2-3 On
1-2 On
2-3 Off
1-2 Off
2-3 On
1-2 On
2-3 Off
1-2 On
2-3 Off
1-2 On
2-3 Off
1-2 On
2-3 Off
1-2 On
2-3 Off
1-2 On
2-3 Off
Jumper Settings for Core Voltage
Core Voltage
* Default
2.8V*
2.9V
3.2V
3.3V
3.5V
Pins 1-2
Off
On
Off
On
On
JP7
Pins 3-4 Pins 5-6
Off
Off
Off
Off
On
JP2
Off
Off
On
On
On
JP3
1-2 Off
2-3 On
1-2 Off
2-3 On
1-2 Off
2-3 On
1-2 Off
2-3 On
1-2 Off
2-3 On
1-2 Off
2-3 On
1-2 Off
2-3 On
1-2 Off
2-3 On
1-2 Off
2-3 On
Pins 7-8
1-2 Off, 3-4 Off,
5-6 On, 7-8 On
1-2 Off, 3-4 Off,
5-6 On, 7-8 On
1-2 Off, 3-4 Off,
5-6 On, 7-8 On
1-2 Off, 3-4 Off,
5-6 On, 7-8 On
1-2 Off, 3-4 Off,
5-6 On, 7-8 On
1-2 On, 3-4 On,
5-6 Off, 7-8 Off
1-2 On, 3-4 On,
5-6 Off, 7-8 Off
1-2 On, 3-4 On,
5-6 Off, 7-8 Off
1-2 On, 3-4 On,
5-6 Off, 7-8 Off
On
On
On
On
On
JP6
JP8
1-2 Off, 3-4 Off,
5-6 Off
1-2 Off, 3-4 Off,
5-6 Off
1-2 Off, 3-4 Off,
5-6 Off
1-2 Off, 3-4 Off,
5-6 Off
1-2 On, 3-4 On,
5-6 Off
1-2 On, 3-4 On,
5-6 Off
1-2 Off, 3-4 On,
5-6 Off
1-2 Off, 3-4 Off,
5-6 Off
1-2 On, 3-4 Off,
5-6 On
21
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P5BTX/L System Board User’s Manual
2.2.3 Setting the Jumpers on the System Board
2.2.3.1 Jumper Settings for CMOS Clear
Jumper JP5
CMOS Clear
If, for some reason, the CMOS becomes corrupted, the system
can be reconfigured with the default values stored in the ROM
BIOS. To load the default values, power off your system and set
JP5 pins 2 and 3 to On. Wait for a few seconds and set JP5 back
to its default setting, pins 1 and 2 On. You may now power on
your system.
1
2
3
1-2 On: Normal
(default)
1
2
3
2-3 On:
CMOS Clear
22
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