EPOX P55-TX 2 User Manual

82430TX PCIset

P55-TX 2

ISA PCI

with Onboard PCI IDE and Super Multi-I/O.

TRADEMARK

All products and company names are
trademarks or registered trademarks of
their respective holders.

The specification is subject to change without notice.

MainBoard

V023

User Notice

No part of this product, including the product and software may be reproduced, transmit­ted, transcribed, stored in a retrieval system, or translated into any language in any form
by any means with the express written permission of EPoX Computer Company (herein­after referred to as EPoX) except documentation kept by the purchaser for backup
purposes. EPoX provedes this manual "as is" without warranty of any kind, either express
or implied, including but not limited to the implied warranties or conditions of
merchantability or fitness for a particular purpose. In no event shall EPoX be liable for
any loss or profits, loss of business, loss of use or data, interruption of business or for
indirect, special incidental, or consequential damages of any kind, even if EPoX has been
advised of the possibility of such damages arising from any defect or error in the manual
or product. EPoX may review this manual from time to time without notice. For updated
BIOS, drivers, or products release information you may visit EPoX’s home page at:
http://www.epox.com.
Products mentioned in this manual are mentioned for identification purposes only. Prod­uct names appearing in this manual may or may not be registered trademarks of copy­rights of their respective companies.
The product name and revision number are both printed on the mainboard itself.

© Copyright© 1997by EPoX Computer Co., Ltd. All rights reserved.

Handling Procedures

Static electricity can severely damage your equipment. Handle the P55-TX 2 and

any other device in your system with care and avoid contact with components on the
card. Always work on an antistatic surface to avoid possible damage to the card from
static discharge. The packing material placed on a table top makes a good antistatic
work surface. We assume no responsibility for any damage to the P55-TX 2 mainboard
that results from failure to follow installation instructions or failure to observe safety pre­cautions.

CAUTION

The P55-TX 2 mainboard is subject to

damage by static electricity. Always

observe the handling procedures.

Package Checklist

Please make sure your package contain all items listed below before
your installation. If you find any damaged items or missing items,
please contact your retailer.

One Mainboard
One manual
One IDE ribbon cable
One floppy ribbon cable

One PS/2 to AT Keyboard Connector adapter

Contents

page

Chapter 1 - Introduction................................................... 1-1

System Block Diagram ............................................. 1-3

P55-TX 2 Layout...................................................... 1-4

Chapter 2 - Hardware Design ......................................... 2-1

2-1 Overview ..................................................................2-1

2-2 Connectors and Jumpers ............................................2-3

2-3 Real Time Clock Battey Replacement ..........................2-7

2-4 System Memory Configuration ...................................2-8

2-5 Cache Memory Configuration ....................................2-9

2-6 Integrated PCI Bridge .................................................2-10

Chapter 3 - ATX Form -Factor Overview

3-1 External Madem Ring-in Power-On and Keyboard Power-

On Functions ................................................ 3-3

Chapter 4 - Award BIOS Setup........................................ 4-1

4-1 Standard CMOS Setup ...............................................4-2

4-2 BIOS Features Setup ..................................................4-2

4-3 Chipset Features Setup...............................................4-6

4-4 Power Management Setup ..........................................4-8

4-5 Plug & Play/PCI Configuration....................................4-11

4-6 Integrated Peripherals.................................................4-14

4-7 Load Setup Defaults ...................................................4-16

4-8 Change Supervisor or User Password .........................4-17

4-9 IDE HDD Auto Detection ...........................................4-18

4-10 HDD Low Level Format ..............................................4-20

4-11 Save & Exit Setup .......................................................4-20

4-12 Exit Without Saving ....................................................4-20

Chapter 5 - Technical Information....................................5-1

5-1 I/O & Memory Map ....................................................5-1

5-2 Time & DMA Channels Map ......................................5-2

5-3 Interrupt Map.............................................................5-2

5-4 RTC & CMOS RAM Map ...........................................5-3

Appendix A: POST Codes...................................................................5-4

Appendix B: I/O Connectors...............................................................5-8

Read me first

1. The "LOAD SETUP DEFAULTS " function loads the system default data directly from
ROM and initializes the associated hardware properly. This function is necessary
when you accept this mainboard, or the system CMOS data will corrupt.

ROM PCI/ISA BIOS

CMOS SETUP UTILITY

AWARD SOFTWARE, INC.

STANDARD CMOS SETUP SUPERVISOR PASSWORD
BIOS FEATURES SETUP USER PASSWORD
CHIPSET FEATURES SETUP IDE HDD AUTO DETECTION
POWER MANAGEMENT SETUP HDD LOW LEVEL FORMAT
PNP/PCI CONFIGURA ETUP
INTEGRATED PERIPH SAVING

LOAD SETUP DEFAULTS

ESC: QUIT :SELECT ITEM
F10:Save & Exit Setup (Shift)F2 :Change Color

Load Setup Defaults Except Standard COMS SETUP

Load SETUP Default (Y/N)? Y

2. KBPO(KeyBoard Power On) Function : There is a basic requirement that the
" +5V SB" power of the ATX power supply must be > = 0.1A (100mA).

Please refer to chapter 3 -1 for detail.

LOAD SETUP DEFAULT

The P55-TX 2 mainboard is a high performance system hardware based

on Intel Pentium processor and is equipped with four PCI slots, four stan­dard ISA slots, a PnP Super I/O controller and two dual-port PCI-IDE connec­tors for the future expansion. The hardware dimension is an ATX form-factor
that is 208mm x 305mm with a four-layer design technology.

Specification

Intel 82430TX PCIset chipset.
Intel Pentium Processor, Pentium Processor with MMXTM technology,

AMD K5/K6 and Cyrix 6x86/6x86L/6x86MX operating at 100 ~ 333 MHz
with 321ZIF socket 7 provides scalability to accept faster processors in the
future.

Supports an onboard Switching Voltage Regulator to increase CPU and

system reliability.

Supports CPU Vcore Voltage 2.0V/2.1V/2.8V/2.9V/3.2V selection.

Supports up to 256 MegaBytes of DRAM (a minimum of 8 MB) on board (72­Pin SIMM x 4 and 168-Pin DIMM x 2). BIOS will autometically detect and
configure FP DRAM, EDO DRAM and SDRAM (Refer to Chapter 2-4,
System Memory Configuration).

Introduction 1-1

Chapter 1

Introduction

R

R

R

Supports Onboard Burst/Pipelined burst synchronous L2 Write Back
Cache. The cache memory is 512KB (64KB*32 SRAM).

Supports four 16-bit ISA slots and four 32-bit PCI slots and provides two
independent high performance PCI IDE interfaces capable of supporting PIO
Mode 3 and Mode 4 devices.

Supports ATAPI (e.g. CD-ROM) devices and Ultra DMA 33 Harddisk for
both IDE interfaces.

Supports 1 floppy port, 1 parallel port (EPP,ECP port), and 2 serial ports
(16550 Fast UART compatible) with PnP Super I/O chip.

Supports both PS/2 style mouse and PS/2 style AT keyboard connectors.

Supports Award Plug & Play BIOS. The BIOS is stored in Flash EPROM
form. It provides better upgradeability for the system.

Supports a CPU Hardware sleep and SMM (System Management Mode)
function.

Supports a PWR/ON connector with an ATX power supply for a Remote ON/
OFF controller, a Ring-in (External Modem only) Power-ON and a Keyboard
Power-ON function.

1-2 P55-TX 2

Supports a USB connector.
Utilizes a Lithium battery which provides environmental protection and

longer life-time.
Supports a CPU temperature alarm so that when CPU's cooling fan is malfunc-

x tioning or CPU overheats, CPU will automatically slow down.

Supports a dual-button configuration which consists of POWER button for Off/
On transitions and SLEEP button for Sleep/Wake transitions. The configuration
is for ACPI-defined 4-second override feature of the SLEEP button. When the
user presses the power button for less than 4 seconds, the system enters into
sleep mode. When the user presses the power button for more than 4 seconds,
the system is powered off.

Introduction 1-3

PCI Slots

>

>

PB

SRAM

TAG

Graphics

Control

<

TAG Control

<

PCI BUS

HOST BUS

MTXC

HOST Bridge

324 BGA

Port_A

Universal Serial Bus

Pentium

processor

>

>

Port_B

R

MA[11:0]
CONTROL

MD[63:0]

<

PIIX4

I/O Bridge

324 BGA

BIOS

Flash EPROM

Keyboard

BIOS

>

>

>

Super

I/O

IDE CD-ROM

IDE HDD

ISA Slots

Serial 1

Serial 2
FDD
Printer

Figure 1-2 System Block Diagram

1-4 P55-TX 2

P55-TX 2 Layout

JP10

COM1

PS/2

JP13

ATX Power Conn.

MOUSE

K/B

JP12

CONN.

JP1

J8

CONN.

PRINTER

JP11

6 10
1 5

COM2

See Page

2-5

USB Conn.

CN1

Winboand

83877F

BANK1

J15

BANK2

BANK1

BANK0

1
3

See Page

2-6

J18

See Page

2-4

SOCKET 7

PCI#4

PCI#3

PCI#2

SIMM 4
SIMM 3
SIMM 2
SIMM 1

DIMM2
DIMM1

MTXC

J6
J5

J7

PIIX4

Secondary IDE

Primary IDE

FDD CONN.

<

BIOS

<

TAG

SRAM

64K*64

See Page

2-3

J9

1

3

J10

JP14

<

Keyboard BIOS

PCI#1

Figure 1-1

See Page

2-4

JP8

131

3

JP2

See Page

2-5

2

1 25

JP4

SLEEP SPEAKERTB-LED

G-LED RESET KEYLOCKHD-LEDPW-ON

JP9

IR CONN

5 1

J4

26

2-1 Overview

Hardware Design 2-1

Chapter 2

Hardware design

The P55-TX 2 is designed with Intel 82430TX PCIset chipset which is developed

by Intel Corporation to fully support Pentium Processor PCI/ISA system. The Intel
82430TX PCIset chipset can increase integration and improve performance designs.
The chipset provides an integrated IDE controller with two high performance IDE
interfaces for up to four IDE devices (hard devices, CD-ROM device, etc). The PnP
Super I/O controller provides the standard PC I/O functions: a floppy interface, two
16-byte FIFO serial ports and an EPP/ECP capable parallel port. The P55-TX 2 layout
is shown in the previous page for user's reference. Care must be taken when insert­ing memory modules, inserting CPU or even plugging PCI card into the associated
slots to avoid damaging any circuits or sockets on board. A cooling fan is strongly
recommended when installing P54C/P54CTB/P55C (MMX)/K5/K6/6x86 (6x86L)
processor due to possible overheat. The P55-TX 2 supports CPU temperature monitor
and alarm to prevent CPU's cooling fan from malfunction or CPUoverheat. There is a
heat sensor to monitor CPU temperature. If CPU overheats, then speaker will alarm
and CPU will slow down to save your data and shutdown the system.

R

The P55-TX 2 supports a minimum of 8MB of system memory and a maximum of

256MB with 512KB synchronous SRAM onboard to increase system performance.

The P55-TX 2 supports standard Fast Page, EDO (Extended Data Out or Hyper

Page Mode) or synchronous DRAM. The P55-TX 2 provides four 72-pin SIMM
and two 168-pin DIMM sites for memory expansion. Each socket supports 1M x 32
(4MB), 2M x 32 (8MB), 4M x 32 (16MB), and 8M x 32 (32MB) single-sided or double­sided memory modules. The memory timing requires 70 ns for Fast Page devices or 60
ns for EDO DRAM. This mainboard has two 168-pin DIMM sites to support 3.3V
(power level) Unbuffered Synchronous DRAMs(SDRAM) or 5.0V (power level) Fast
Page and EDO DRAM. Memory parity generation and checking are not supported.
(DRAM Modules may be parity[x 36] or non-parity[x 32].

The P55-TX 2 supports two Onboard PCI IDE connectors that can support PIO
Mode/Ultra DMA 33 device and automatically detect IDE harddisk type by BIOS
utility.

2-2 P55-TX 2

The P55-TX 2 supports Award Plug & Play BIOS for the ISA and PCI cards. The
BIOS can be located in Flash EPROM. The advantage of having Flash EPROM is
much easier to replace BIOS code if necessary.

The P55-TX 2 has been designed with ATX form-factor with ATX power connector.
The mainboard layout and system block diagram are shown in Figure 1-1 and Figure
1-2.

Hardware Design 2-3

2-2 Connectors and Jumpers

This section describes all of the connectors and jumpers equipped in the mainboard.
Please refer to Figure 1-1 for the location of each connector and jumper.The figure
in the following means connecting pin 1&2 and means connecting pin 2&3.
Jumpers with two pins are shown as for open and for close.

JP14 KeyLock - Keyboard lock switch & Power LED connector.

1

5

1.Power LED(+)

2.N/C

3.GND

4.Keylock

5.GND

7

10

+

+

Speaker - connect to the system's speaker for beeping.

7. Speaker

8. N/C

9. GND

10. VCC

Reset - Close to restart system.

Sleep/Resume switch : Close to enter sleep mode.

A keystrobe or mouse movement (mouse driver exists) will
instantly "wake up"the system.(for AT Power Supply Only)

Power Saving LED indicator - LED ON when the system is in any
saving mode.

Turbo LED indicator - LED ON when a higher speed is selected.

+

Harddisk LED indicator - LED ON when Onboard PCI IDE

Harddisks activate.

2-4 P55-TX 2

JP9 System Power ON/OFF Switch (For ATX Power Suppply Connector)

Pressing the button once will switch the system on and enter the
SLEEP MODE(Suspend mode). While in the SLEEP MODE, a
keystrobe or mouse movement (mouse driver exists) will instantly
"wake up"the system. Pressing the button while the system is on for
more than 4 seconds will turn the system off.

Note : The button should be a momentary switch that is normally on.

JP1 The Power Supply (+12V) of the CPU Cooling FAN:

1

1.GND

3

J10/J9 EPROM BIOS Selection :

2.+12V

3.GND

1

1-2 : 12V Flash EPROM (Intel).

3

2-3 : 5V Flash EPROM.(SST, Winbond).(Default)

JP8 Clear CMOS:

1
3

1-2 : Normal operation (Default)

2-3 : Clear CMOS Values
This setting allows users to clear current CMOS data and to return
to the initial data by setting the jumper to 2-3 when the system is
off. This jumper should be brought back to pin 1-2 to restore the
normal operation. Here, we strongly recommend you pull out the
power cable for safety and for avoiding damaging befor clearing
CMOS data.

JP2 Keyboard Power ON function:

1

1-2 : Enabled

3

(For the details, please refer to Chapter 3-1: Keyboard

Power On Function.)

2-3 : Disabled (Default)

7 1

JP7 DIMM1, DIMM2 (168PIN) DRAM TYPE Select:

1-2, 3-4 : Support 3.3V SDRAM (Default)

8

2

5-6, 7-8 : Support 5V EDO/FP DIMM TYPE DRAM

J4 IrDA/ASK IR CONNECTOR:

1

5

1.VCC

2.NC

3.IRRX

4.GND

5.IRT

Hardware Design 2-5

CN1 USB CONNECTOR:

1

I/O back panel connector:

COM1

JP4:CPU Clock Rate Select. (Easy One Jumper Setting Only)

1 2

25 26

2

Reserved for USB port Adapter
(refer to APPENDIX B:I/O Connectors)

16 15

PS/2

Mouse

CPU

Pentium Processor
P54C / P55C Cyrix 6x86 / 6x86L / M2

JP4
1-2 66/100MHz (66 x 1.5)
3-4 60/120MHz (60 x 2) 6x86-PR150+(120MHz)

5-6 66/133MHz (66 x 2) 6x86-PR166+(133MHz)
7-8 75/150MHz (75 x 2) 6x86-PR200+(150MHz)
9-10 60/150MHz (60 x 2.5) 6x86MX-PR166( M2 )

11-12 66/166MHz (66 x 2.5) 6x86MX-PR200( M2 )
13-14 75/188MHz (75 x 2.5) 6x86MX-PR233(M2)
15-16 66/200MHz (66 x 3) 6x86MX-PR233( M2 )
17-18 75/225MHz (75 x 3) 6x86MX-PR266(M2)
19-20 66/233MHz (66 x 3.5) 6x86MX-PR266( M2 )

21-22 66/266MHz (66 x 4)
23-24 60/300MHz (60 x 5)
25-26 66/333MHz (66 x 5)

AMD K5 / K6 IBM 6x86

PS/2

Keyboard

R

parallel port

COM2

(Default)

¡**

*
*

*
*

*

*

These jumper settings are reserved for the future CPU
versions. When the future CPU versions are ready and
suitable for this mainboard, these jumper settings will be
correctly updated.

2-6 P55-TX 2

J18 CPU Vcore voltage selection for Pentium MMX / AMD K6 / Cyrix 6X86L

6

1

2.0V

2.8V

2.9V

3.2V

2.1V

5 10

1-6 : 2.0V for AMD K6 fast processor (Reserved)

2-7 : 2.8V for Pentium P55C(MMX)/Cyrix 6X86L(Dual Voltage)
3-8 : 2.9V for AMD K6 PR166/PR200 or 6X86MX-PR166/PR200/

PR233/PR266(Dual Voltage)
4-9 : 3.2V for AMD K6 PR233/PR266(Dual Voltage)
5-10 : 2.1V for AMD K6 fast processor (Reserved)

Hardware Design 2-7

1

2

3

2-3

1.Remove

Real Time Clock Battery Replacement

The battery can be replaced by a Sanyo / Panasonic CR2032, or
other equivalent coin lithium battery. Please follow the steps below to
replace the battery.

2.Insert

+

+

+

1

2

3

+

+

+

4

+