EPOX P55-BT User Manual

82430TX PCIset

P55-BT

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

V043

Package Checklist

Please make sure your package containg 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

Contents

page

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

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

P55-BT 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 Power Connector

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

on Functions................................................. 3-2

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

NOTE :

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 is corrupted.

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

LOAD SETUP DEFAULT

The P55-BT 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 AT form-factor that is
220mm x 260mm with a four-layer design technology.

Specification

Intel 82430TX PCIset chipset.
Intel Pentium Processor operating at 100 ~ 333 MHz (Easy CPU CLK

Setting JP4 : One Jumper Only) and P55C with 321 ZIF socket 7 for
scalability to accept faster processors in the future.

Supports an onboard Switching Voltage Regulator to increase CPU and
System's reliability.

Supports CPU Vcore Voltage 2.0V/2.8V/2.9V/3.2V selection.
Supports up to 256 MegaBytes of DRAM(a minimum of 8 MB) on board(72-

Pin SIMM x 2, 168-Pin DIMM x 2), BIOS auto FP DRAM, EDO DRAM and
SDRAM configuration.(Refer to Chapter 2-4 System Memory Configuration)

Introduction 1-1

Chapter 1

Introduction

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 for both IDE
interface.

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-BT

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 malfunction

or CPU overheats, CPU 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.

Supports onboard ATX and AT power connectors.

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-BT

P55-BT Layout

1

252 26

JP4

10 5

Keyboard BIOS

See Page

2-5

See Page

2-4

JP1

1

3

See Page

2-6

J18

Socket 7

<

PCI#4

JP2
J10

J9

JP8

1

3

PIIX4

W83877

PCI#3

PCI#2

CN1

FDD CONN.

PCI#1

Secondary IDE

MTXC

1

USB Conn.

JP13

Power Conn.

ATX Power Conn.

PRINTER

Primary IDE

64K*64

K/B
CONN.

COM2

COM1

BANK2

SIMM 1

SIMM 2

8 7

JP7

2 1

See Page

2-4

DIMM 2

BANK1

DIMM 1

BANK0

6 1

See Page

2-4

ATX-PW-ON

J4

HD-LED TB-LED G-LED RESETSLEEP SPEAKER KEYLOCK

JP9

IR CONN.

Note : Means Pin 1

Figure 1-1

JP14

See Page

2-4

2-1 Overview

Hardware Design 2-1

Chapter 2

Hardware design

The P55-BT 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-BT 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-BT supports CPU temperature monitor
and alarm to prevent CPU's cooling fan from malfunction or CPUoverheat. When CPU
overheats there is a heat sensor to monitor CPU temperature, than speaker will alarm
and CPU slow down to save you data and shutdown system.

R

The P55-BT supports a minimum of 8MB of System Memory and a maximum of

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

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

Mode) or synchronous DRAM. The P55-BT provides two 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 double-sided 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, EDO
DRAM. Memory parity generation and checking are not supported. (DRAM Mod-
ules may be parity[x 36] or non-parity[x 32].

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

2-2 P55-BT

The P55-BT 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-BT has been designed with AT form-factor with ATX/AT 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

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

7. Speaker

8. N/C

10

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 activites.

2-4 P55-BT

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

JP8 Clear CMOS:

1

3

This setting allows users to clear current CMOS data to back to

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

1-2 : Normal operation (Default)
2-3 : Clear CMOS Values

default by setting the jumper to 2-3 when 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 from damage 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

Note: When Enabled or Disabled the Keyboard Power ON function.
Make sure to pull out the power cable or disconnect the 20-PIN
power supply.

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

1J4 IrDA/ASK IR CONNECTOR:

5

1.VCC

2.NC

3.IRRX

4.GND

5.IRTX

Hardware Design 2-5

CN1 USB CONNECTOR:

1

JP13 PS/2 MOUSE CONNECTOR:

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

1

5

CPU

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

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

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

21-22 66/266MHz
23-24 60/300MHz
25-26 66/333MHz

1. Data (Red Wire)

2. Clock (Blue Wire)

3. GND (Green)

4. NC

5. VCC (Yellow)

Pentium Processor
P54C / P55C Cyrix 6x86 / 6x86L / M2
AMD K5 / K6 IBM 6x86

R

(Default)

¡**

*
*

*
*

*

*

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

2-6 P55-BT

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

10 5

3.5V

3.2V

2.9V

2.8V

2.0V

6 1

6x86L or 6x86MX

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/

(Default)

RP233/PR266(Dual Voltage)
4-9 : 3.2V for AMD K6 PR233/PR266(Dual Voltage)
5-10 : 3.5V for Pentium P54C/P54CS/P54CTB/AMD K5/Cyrix

6X86(Single Voltage for Dual or Single plane)

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

+