SOYO 5XBE5 Use and care manual

5XBE5
82430 TX P54C/P55C PCI Mainboard
User’s Guide &
Technical Reference

ii
®
™
About This Guide
This UserÕs Guide is for assisting system manufacturers and end users in setting
up and installing the mainboard. Information in this guide has been carefully
checked for reliability; however, no guarantee is given as to the correctness of the
contents. The information in this document is subject to change without notice.
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Copyright 1997, Soyo Computer Inc. All rights reserved. This manual is
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without notice and without obligation to notify any person of such revision or
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Edition: May 1998
Version 1.1
5XBE5 SERIAL

Table of Contents
Chapter1: Introduction .....................................................1
Key Features .................................................................................1
Unpacking the Mainboard.............................................................2
Electrostatic Discharge Precautions..............................................2
Mainboard Layout w/ Default Settings .........................................3
Chapter2: Hardware Setup ...............................................5
Jumpers .........................................................................................5
JP5: CMOS Clear Jumper .......................................................5
JP40: CE Test Jumper Pin ......................................................5
JP9: ...............................Smart Detect CPU Voltage function Auto/Manual
Jumper .....................................................................................6
JP37: DIMM Voltage Select Jumper .....................................6
JP38: Flash ROM Select Jumper............................................6
CPU Type Configuration ..............................................................7
Step 1: Frequency Setting.......................................................7
P54C Ð 75/90/100 CPU Settings (1.5 x clock) ...................7
P54C Ð 100/120/133 CPU Settings (2.0 x clock) ...............8
P54C/P55CÐ 150/166 CPU Settings (2.5 x clock) .............9
P54C/P55C Ð 180/200 CPU Settings (3.0 x clock) ..........10
P54C/P55C Ð 233 CPU Settings (3.5 x clock) .................11
Step 2: CPU Single/Dual Voltage Setting............................12
Single Voltage CPU Setting .............................................12
Dual Voltage CPU Setting................................................13
Memory Configuration ...............................................................13
Memory Configuration Table................................................14
RAM Bank Installation Notice..............................................14
Cache Configuration ...................................................................14
Cache Size and RAM Locations ...........................................14
Multi I/O Port Addresses ............................................................15
Connectors ..................................................................................15
COM1, COM2 Ñ COM1/COM2 Connectors ......................15
JP1: Power Supply Selection Jumper ...................................16
FDC Ñ FDC Connector........................................................16
AT PW Ñ Power Supply Connectors ...................................16
ATX PW Ñ ATX Power Supply Connectors .......................16
KB Conn. Ð Keyboard Connector .........................................17
IR1 Ð IR Connector ...............................................................17
PRT Ð Parallel Port Connector ..............................................17
PS/2 Mouse Conn. Ð PS/2 Mouse Connector........................17
USB1Ð Universal Serial Bus Connector ...............................18

IDE1/IDE2 Ð On-board Primary/Secondary IDE HDD
Connectors .............................................................................18
J1 Ð Front Panel Connectors..................................................18
J17 Ð Keylock & Power LED Connector ..............................18
J18 Ñ Speaker Connector .....................................................18
J19 Ð Hardware Reset Control...............................................18
PW2 Ñ ATX Power Supply On/Off Switch Connector
(Momentary Type).................................................................19
J22 Ð Turbo LED COnnector ................................................19
J24 Ð HDD LED Connectors .................................................19
JP43 Ð CPU Cooling Fan Connector .....................................19
Pin Assignment .....................................................................19
JP44 Ð Wake-On-LAN (WOL) Header .................................19
Pin Assignment .....................................................................19
Chapter3: BIOS Setup.....................................................20
Standard CMOS Setup ................................................................21
BIOS Features Setup ...................................................................23
Chipset Features Setup................................................................26
Power Management Setup ..........................................................29
PNP/PCI Configuration Setup ....................................................32
Load Setup Defaults....................................................................34
Load BIOS Defaults....................................................................34
Integrated Peripherals .................................................................35
Supervisor Password ...................................................................38
User Password .............................................................................39
IDE HDD Auto Detection ...........................................................40
Appendix: CPU Setting List............................................41
CPU Setting List (Continued) ...............................................42
Voltage Setting Table (JP30).................................................42

1 Introduction
The 82430 TX PCI mainboard is a high-performance AT form-factor
system board that supports P54C/P55C family CPUs and 512K external
cache memory on the mainboard. The mainboard is fully compatible
with industry standards, and adds many technical enhancements.
Key Features
¥ CPU
Ñ Supports P54C/P55C family CPUs running at 75~233 MHz
speeds; Cyrix 6x86/6x86L/6x86MX CPUs running at PR150+~
PR233+speeds; and AMD K5/K6 CPUs running at PR75 ~
PR266
ÑSupports SOCKET 7 for upgrade
Ñ Supports P54C/P55C series SMM Mode and CPU Stop Clock
Ñ Supports MMX technology
Ñ Smart Detect CPU Voltage function
¥ L2 Cache Controller
Ñ Write Back Cache Modes and Direct Mapped Organization
Ñ On-board 512K Pipeline Burst SRAMs Cache
¥ DRAM Controller
Ñ Supports Fast-Page Mode, EDO , and SDRAM (both symmetrical
and asymmetrical addressing)
Ñ Supports 3 strips of 8MB/16MB/32MB/64MB Unbuffered
DIMMs
Ñ On-board memory configurations from 4 to 256 Mbytes
¥ BUS Controller
Ñ Compliant to PCI specifications v2.1
Ñ Four 32-bit PCI slots (Masters) and four ISA slots, 4-layer PCB
ÑSupports Universal Serial Bus Ñ USB
¥ Peripheral Controller
Ñ System BIOS built-in NCR810 SCSI Card BIOS and ÒPlug and
PlayÓ function
Ñ On-board built-in PCI Master IDE controller and floppy controller
Ñ On-board supports for two high speed UARTS (w/i 16550 FIFO),
one ECP/EPP/SPP compatible parallel port, and one PS/2 mouse
port
Ñ On-board supports FLASH Memory for easy upgrade BIOS
Ñ Easy installation of Triones EIDE/ATAPI CD-ROM Bus
Master Drivers

2Introduction
Unpacking the Mainboard
The mainboard package contains:
¥The 82430TX Mainboard
¥A disc and a manual or a CD and a Quick Installation Guide
Note: Do not unpack the mainboard until you are ready to install it.
Follow the precautions below while unpacking the mainboard.
1.Before handling the mainboard, ground yourself by grasping an
unpainted portion of the systemÕs metal chassis.
2. Remove the mainboard from its anti-static packaging and place it on
a grounded surface, component side up.
3. Check the mainboard for damage. If any chip appears loose, press
carefully to seat it firmly in its socket.
Do not apply power if the mainboard appears damaged. If there is
damage to the board contact your dealer immediately.
Electrostatic Discharge Precautions
Make sure you ground yourself before handling the mainboard or other
system components. Electrostatic discharge can easily damage the
components. Note that you must take special precaution when handling
the mainboard in dry or air-conditioned environments.
Take these precautions to protect your equipment from electrostatic
discharge:
¥Do not remove the anti-static packaging until you are ready to install
the mainboard and other system components.
¥Ground yourself before removing any system component from its
protective anti-static packaging. To ground yourself grasp the
expansion slot covers or other unpainted portions of the computer
chassis.
¥Frequently ground yourself while working, or use a grounding strap.
¥Handle the mainboard by the edges and avoid touching its
components.

Introduction 3
Mainboard Layout w/ Default Settings
2
3
1
5
17
15
6
78
11
10
9
19
14
2
3
1212
13
16
4
18
Figure 1Ð1. Mainboard Layout
1. ZIF socket 7 (for P54C/P55C) 11. Floppy Connector
2. 82430 TX Chipset 12. IDE1/IDE2 Connector
3. Pipelined Burst SRAM 13. Parallel Port Connector
4. Ultra I/O Chip 14. COM1/COM2 Connector
5. PnP FLASH BIOS 15. AT Power Supply Connector
6. TAG SRAM 16. ATX Power Supply
Connector
7. ISA Slots 17. PS/2 Mouse Connector
8. PCI Slots 18. Keyboard connector
9.
10.
SIMM Bank
Unbuffered DIMM Bank
19. Lithium battery (for CMOS
memory, 3V)

4Introduction
Default settings are as follows: P54C/P55C 133MHz (P54C) CPU, 512K
Pipelined Burst cache, On-board PCI E-IDE Enabled, 2 high speed
UARTS Enabled (w/ 16550 FIFO), 1 EPP/ECP port (ECP + EPP mode),
5V DRAM/3.3V DIMM, and AT power supply.
1
IR
FDC
#3#4 #2 #1
ISA SLOT
#2 #1#3#4
PCI SLOT
SIMM BANK
DIMM3 DIMM2 DIMM1
82371AB
COM2 COM1
IT
8679
P.B. SRAM
KB
Conn
AT PW
ATX PW
PRT IDE 1
IDE 2
TAG SRAM
Socket 7
(586 CPU
Family)
Flash BIOS
JP1
USB
11
3V
Lithium
Battery
82439TX
1
JP37
JP30
1357911
JP9
PS/2
Mouse
Conn
JP40
P.B. SRAM
1
JP5
SW1
654231
ON
1
JP43
1
JP38
SPKKeylock
RST
Momentary
Button
Turbo
LED HDD
LED
J1
JP44
1
Figure 1Ð2. Mainboard Default Setting
Important: Make sure the system is well ventilated to prevent
overheating and ensure system stability.

2 Hardware Setup
This chapter explains how to configure the mainboardÕs hardware. After
you install the mainboard, you can set jumpers, install memory on the
mainboard, and make case connections. Refer to this chapter whenever
you upgrade or reconfigure your system.
CAUTION:Turn off power to the mainboard, system chassis, and
peripheral devices before performing any work on the
mainboard or system.
Jumpers
JP5: CMOS Clear Jumper
Clear the CMOS memory by momentarily shorting pin 2Ð3; then
shorting pin 1Ð2 to retain new settings.
CMOS Setting JP5
Retain CMOS data
(default)
1
Clear CMOS data
1
JP40: CE Test Jumper Pin
This connector is reserved for the CE test. If you run into problems
during the CE test, unplug the jumper pin and try again.

6Hardware Setup
JP9: Smart Detect CPU Voltage function Auto/Manual
Jumper
This jumper is reserved for few old non-Intel CPUs which can not be
detected correctly. If you run into problems while detecting the voltage
of old non-Intel CPUs, remove this jumper to correct it.
JP37: DIMM Voltage Select Jumper
Most of DIMMs in the consumer market is still 3.3V and this jumper is
reserved only for upgrading purpose in the near feature. If you have 5V
SIMM or DIMM which matches the existing 3.3V DIMM socket on this
mainboard, than you need to set this jumper to 5V before installing the
DIMM.
DIMM Voltage JP37
3.3V (default)
1
5V
1
Caution: Do not change this jumper to 5V setting unless you are sure
that your DIMMs are 5V. The wrong setting may cause the
system malfunction.
JP38: Flash ROM Select Jumper
Flash ROM Brand JP38
SST, MXIC,
WINBOND,
ATMEL
(default)
1
INTEL
1

Hardware Setup 7
CPU Type Configuration
This section shows you how to configure your CPU step by step. Note
that you need to check the CPU voltage before installation. This board
supports75MHz host bus frequency for Cyrix CPUs. Beware that
75MHz host bus frequency is over the specification of this chipset.
Therefore, you hav to use high quality devices to meet the standard of
these CPUs, i.e., high quality DRAM and VGA cards.
❑Step 1: Frequency Setting
P54C – 75/90/100 CPU Settings (1.5 x clock)
AMD K5 – PR75/PR90/PR100/PR120/PR133 (1.5 x clock)
654321
ON
SW1
654321
ON
SW1
654321
ON
SW1
P54C– 90/60 MHz
AMD K5 – PR 90/60MHz
AMD K5 – PR 120/60 MHz
P54C– 100/66 MHz
AMD K5 – PR 100/66 MHz
AMD K5 – PR 133/66 MHz
P54C– 75/50 MHz
AMD K5 – PR 75/50 MHz
SW1
654231
ON
82371AB
Figure 2Ð1Ð1. CPU Jumper Settings
Note: 1. You must equip the CPU with a fan and heat sink for system
stability.
2. AMD K5ÐPR90= AMD 5k86(SSA5)ÐP90.

8Hardware Setup
P54C – 100/120/133 CPU Settings (2.0 x clock)
Cyrix 6x86/6x86L/6x86MX – PR150+/PR166+/PR200+CPU Settings (2.0
x clock)
P54C– 100/50 MHz
Cyrix 6x86/6x86L/6x86MX
– PR200+/75 MHz
P54C– 120/60 MHz
Cyrix 6x86/6x86L – PR150+/60 MHz
P54C– 133/66 MHz
Cyrix 6x86/6x86L/6x86MX
– PR166+/66 MHz
654321
ON
SW1
654321
ON
SW1
654321
ON
SW1
654321
ON
SW1
SW1
654231
ON
82371AB
Figure 2Ð1Ð2. CPU Jumper Settings
Note: 1. You must equip the CPU with a fan and heat sink for system
stability.
2. The host bus frequency of Cyrix 6x86LÐPR200+CPU is over
the standard value, therefore, you need to use higher
standard devices to meet the specifications of such CPUs, i.e.,
high quality DRAM/VGA card.)

Hardware Setup 9
P54C/P55C– 150/166 CPU Settings (2.5 x clock)
Cyrix 6x86MX – PR166/PR200/PR233 CPU Settings (2.5 x clock)
AMD K5/K6 – PR150/PR166 CPU Settings (2.5 x clock)
ON
82371AB
P54C/P55C– 166/66 MHz
Cyrix 6x86MX – PR200/66 MHz
AMD K5/K6 – PR 166
Cyrix 6x86MX – PR233/75 MHz
P54C/P55C– 150/60 MHz
Cyrix 6x86MX – PR166/60 MHz
AMD K5 – PR 150/60 MHz
654321
ON
SW1
654321
ON
SW1
654321
ON
SW1
SW1
654231
Figure 2Ð1Ð3. CPU Jumper Settings
Note: You must equip the CPU with a fan and heat sink for system
stability.

10 Hardware Setup
P54C/P55C – 180/200 CPU Settings (3.0 x clock)
Cyrix 6x86MX – PR233 CPU Settings (3.0 x clock)
AMD K6 – PR200 CPU Setting
P54C/P55C– 200/66 MHz
AMD-K6/PR200
Cyrix 6x86MX – PR233/66MHz
P54C/P55C– 180/60 MHz
654321
ON
SW1
654321
ON
SW1
SW1
654231
ON
82371AB
Figure 2Ð1Ð4. CPU Jumper Settings
Note: You must equip the CPU with a fan and heat sink for system
stability.

Hardware Setup 11
P54C/P55C – 233 CPU Settings (3.5 x clock)
AMD K6 – PR233 CPU Setting
Socket 7
(586 CPU
Family)
654321
ON
SW1
82371AB
Figure 2Ð1Ð5. CPU Jumper Settings
Note: You must equip the CPU with a fan and heat sink for system
stability.

12 Hardware Setup
❑Step 2: CPU Single/Dual Voltage Setting
There are two kinds of CPU input voltages due to various designs of
CPUsÑsingle voltage and dual voltage. Set your CPU according to the
type that you have.
For Intel P54C/P55C single and dual voltage series CPUs, there is no
need to adjust any jumper for CPU voltag due to the Smart Detect CPU
Voltage function.
Single Voltage CPU Setting
Signal voltage CPUs use the same voltage for VIO and VCore and has
been used traditionally. The CPUs which fall into this category are Intel
P54C series, AMD-K5-PRxxxBx, AMD-K5-PRxxxCx, AMD-K5-
PRxxxFx, and Cyrix 6x86. Refer to the following figures to set these
CPUsÕ voltage:
JP30
1357911
3.52V CPU
(i.e., P54C/6x86/K5)
JP30
1357911
3.3V CPU (default)
(i.e., P54C)
Socket 7
(586 CPU
Family)
Flash BIOS
JP30
1357911
Figure 2Ð2Ð1. Single Voltage CPU
Note: Please ask your CPU dealer for the exact CPU voltage before
you install it.

Hardware Setup 13
Dual Voltage CPU Setting
Dual voltage CPUs are designed to use different voltage for VIO and
VCore and they include Intel P55C series, Cyrix 6x86L/6x86MX, AMD
K6, and MMX technology included CPUs. Refer to the following
figures to set these CPUsÕ voltage:
JP30
1357911
2.8V CPU (default)
(i.e., P55C, 6x86L)
JP30
1357911
2.1V CPU
(i.e., K6)
JP30
1357911
2.9V CPU
(i.e., K6)
JP30
1357911
3.2V CPU
(i.e., P54C)
Socket 7
(586 CPU
Family)
Flash BIOS
JP30
1357911
JP30
1357911
2.2V CPU
(i.e., K6-3D266, 3D300)
Figure 2Ð2Ð2. Dual Voltage CPU
Note: Due to various design, please ask your CPU dealer for the exact
VIO and VCORE voltage before you install it.
Memory Configuration
The mainboard supports one bank of 72-pin SIMM modules and three
strips of 168-pin/3.3V Unbuffered DIMM modules. The mainboard
requires SIMM of at least 70ns access time.
The mainboard supports from 4 to 256 Mbytes with no other restrictions
on memory configurations. You must install two strips of SIMM
modules to complete a bank.

14 Hardware Setup
Memory Configuration Table
SIMM Bank DIMM Bank
Bank 0 DIMM 1 DIMM 2 DIMM 3
RAM Type FPM/EDO FPM/EDO
SDRAM
FPM/EDO/
SDRAM
FPM/EDO/
SDRAM
Single
RAM
Module
Size (MB)
4/8/16/32/64 8/16/32/64 8/16/32/64 8/16/32/64
Note: Do not install FPM or EDO SIMM/DIMM when you already
installed SDRAM type of DIMM.
RAM Bank Installation Notice
Due to the RAS line share architecture of TX chipset, do not install
SIMM bank with DIMM1. All other combinations are acceptable; but,
due to the TX chipset architecture, you will need to use one of the
following combination when using DIMM memory above 64MB:
1. Bank0 & DIMM2
2. DIMM1
3. DIMM1 + DIMM2
Cache Configuration
The mainboard has a write-back caching scheme with built-in 512KB
Level 2 Pipelined Burst cache onboard to improve the system
performance.
Cache Size and RAM Locations
Cache Size Cache RAM TAG RAM Cacheable
Range
512KB 64K x 32
on U3,U4
32K x 8
on U2
64 MB

Hardware Setup 15
Multi I/O Port Addresses
Default settings for multi-I/O port addresses are shown in the table
below.
Port I/O Address IRQ Status
LPT1* 378H 7 ECP + EPP
COM1 3F8H 4
COM2 2F8H 3
* If default I/O port addresses conflict with other I/O cards (e.g. sound
cards or I/O cards), you must adjust one of the I/O addresses to avoid
address conflict. (You can adjust these I/O addresses from the BIOS.
Note: Some sound cards have a default IRQ setting for IRQ7, which
may conflict with printing functions. If this occurs do not use
sound card functions at the same time you print.
Connectors
Attach the mainboard to case devices via connectors on the mainboard.
Refer to Figure 1-1 for connector locations and connector pin positions.
COM1, COM2 — COM1/COM2 Connectors
Attach COM1/COM2 device cable to these connectors. Refer to the
following drawing for pin assignment:
1
5
16
9
12
910
300±30mm
RED
CN1
CN2
CN1 162738495NC
CN2 12345678910

16 Hardware Setup
JP1: Power Supply Selection Jumper
This jumper lets you select either the AT or the ATX power supply. Use
only one power supply at a time on this mainboard.
JP1
AT Power Supply (default)
ATX Power Supply
FDC — FDC Connector
Attach floppy cable to this connector.
AT PW — Power Supply Connectors
The mainboard requires a power supply with at least 200 watts and a
Òpower goodÓ signal. AT PW has two 6-pin male header connectors.
Plug the dual connectors from the power directly onto the board
connector while making sure the black leads are in the center.
ATX PW — ATX Power Supply Connectors
The motherboard provides an ATX power supply connector. It is a
twenty-pin male header connector. Plug the connector from the power
directly onto the board connector while making sure the pin1 is in its
position.
11 20