SOYO 82430 VX PCI User manual

Pentium
82430 VX/P54C PCI Mainboard
User’s Guide &
Technical Reference
5VX0/X2/X5

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.
Copyright Notice
Copyright 1997, Soyo Computer Inc. All rights reserved. This manual is
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Edition: February 1997
Version 2.2
5VX0/X2/X5 SERIAL

Table of Contents
Chapter 1: Introduction ..........................................................1
Key Features ........................................................................................1
Unpacking the Mainboard....................................................................2
Electrostatic Discharge Precautions..................................................... 2
Mainboard Layout w/ Default Settings ................................................3
Chapter 2: Hardware Setup ....................................................5
Jumpers ................................................................................................5
JP3: Display Type ..........................................................................5
JP5: CMOS Clear Jumper ..............................................................5
JPS2: PS/2 Mouse Function Jumper ..............................................6
CPU Type Configuration ..................................................................... 7
Step 1: Frequency Setting..............................................................7
Pentium Ð 75/90/100 CPU Settings (1.5 x clock)......................7
Pentium Ð 100/120/133 CPU Settings (2.0 x clock)..................8
Pentium/AMD Ð 150/166 CPU Settings (2.5 x clock) ..............9
Pentium Ð 180/200 CPU Settings (3.0 x clock)......................... 9
Step 2: CPU Single/Dual Voltage Setting................................... 10
Single Voltage CPU Setting ....................................................10
Dual Voltage CPU Setting....................................................... 11
Memory Configuration ......................................................................12
RAM Bank Installation Notice..................................................... 12
DIMM Voltage Setting................................................................. 12
Cache Configuration ..........................................................................13
Cache Size and RAM Locations ..................................................13
Multi I/O Port Addresses ................................................................... 13
Connectors ......................................................................................... 14
ATX PW Ñ ATX Power Supply Connectors ..............................14
JP9/JP50 Ð ATX Power Supply On/Off Switch Connectors........14
J28, J29 Ð COM1/COM2 Connectors ..........................................14
J7 Ð CD In Connector................................................................... 15
J4 Ð Creative Wave Table Card Connector ..................................15
FDC Connector ............................................................................15
J11 Ð Game Port ........................................................................... 15
J19 Ð Hardware Reset Control......................................................15
J24 Ð HDD LED Connectors ........................................................15

IDE1/IDE2 Ð On-board Primary/Secondary IDE HDD
Connectors ....................................................................................15
JP15 Ð IR Connector ....................................................................16
J17 Ð Keylock & Power LED Connector ..................................... 16
J26, J27 Ð PS/2 Mouse, PS/2 Keyboard Connector......................16
PRT Ð Parallel Port Connector ..................................................... 16
J23: Sleep Switch Connector Enable/Disable ..............................16
J12 ~ J14 Ð Speaker Out Jack, MIC In Jack, Line In Jack ........... 16
J18 Ð Speaker Connector ..............................................................16
J2, J3 Ð Universal Serial bus Connector (Optional) ..................... 17
JP52 Ð Wave Table Connector ..................................................... 17
Chapter 3: BIOS Setup..........................................................18
Standard CMOS Setup ....................................................................... 19
BIOS Features Setup ..........................................................................20
Chipset Features Setup....................................................................... 23
Power Management Setup ................................................................. 26
PNP/PCI Configuration Setup ........................................................... 28
Load Setup Defaults........................................................................... 29
Load BIOS Defaults........................................................................... 30
Integrated Peripherals ........................................................................30
Supervisor Password ..........................................................................33
User Password ....................................................................................34
IDE HDD Auto Detection ..................................................................35
Chapter 4: Drivers Installation Guide .................................36
IDE BUS Master Installation Guide ..................................................36
MS-DOS/WINDOW/WFW ......................................................... 36
WINDOWS NT3.5 ....................................................................... 36
WINDOWS 95 ............................................................................. 37
NOVELL 3.X&4.X ......................................................................37
SCO UNIX ................................................................................... 37
SCO UNIX 5.0 ............................................................................. 38
OS/2 2.0 and WARP 3.X..............................................................39

1 Introduction
The 82430 VX PCI mainboard is a high-performance multimedia and
ATX form-factor system board that supports P54CX/P55CX family
CPUs. You can order 256K or 512K of 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 ~ 200 MHz
speeds; Cyrix 6x86/6x86L CPUs running at
P120+/P133+/P150+/P166+MHz speeds; and AMD K5 CPUs.
ÑSupports SOCKET 7 for upgrade
Ñ Supports P54CX/P55CX SMM Mode and CPU Stop Clock
¥ L2 Cache Controller
Ñ Write Back Cache Modes and Direct Mapped Organization
Ñ On-board 256K/512K Pipeline Burst SRAMs Cache
¥ DRAM Controller
Ñ Supports Fast-Page Mode, and EDO DRAM (both symmetrical
and asymmetrical addressing)
Ñ Supports 2 strips of 8MB/16MB/32MB Unbuffered DIMMs
Ñ On-board memory configurations from 4 to 128 Mbytes
Ñ Supports ÒTable-FreeÓ DRAM configuration in any SIMM bank
¥ BUS Controller
Ñ Compliant to PCI specifications v2.1
Ñ Three 32-bit PCI slots (Masters) and Four ISA slots, 4-layer PCB
Ñ Supports Universal Serial Bus Ñ USB (Optional)
¥ Peripheral Controller
Ñ System BIOS built-in NCR306 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
¥ Onboard creative CT-2505 sound chip and audio phone jacks

2Introduction
Unpacking the Mainboard
The mainboard package contains:
¥ The 82430VX / P54C Mainboard
¥ This User's Guide
¥ One IDE Bus Master driver and three audio drivers diskettes
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
6
1
16
2 2
8 9
2
3
3
2
4
5
723
13
12
11
10
15
14
21 21
22
21 18 19
20
17
Figure 1Ð1. Mainboard Layout
1. P54C in ZIF socket 7 13. IDE1/IDE2 Connector
2. 82430 VX Chipset 14. Wave Table Connector
3. Pipelined Burst SRAM 15. AT Power Connector (Reserved)
4. Creative CT2505 chip 16. ATX Connector
5. PnP FLASH BIOS 17. COM1/COM2 Connector
6. Real Time Clock (RTC) 18. Parallel Port Connector
7. Keyboard BIOS 19. PS/2 KB Connector
8. ISA Slots 20. PS/2 Mouse Connector
9. PCI Slots 21. Audio Jack
10. SIMM Bank 22. Game Port
11. Unbuffered DIMM Bank 23. Super I/O chip
12. Floppy Connector

4Introduction
Default settings are as follows: Pentium 100MHz CPU, 256K
Pipelined Burst cache, On-board PCI E-IDE Enabled, 2 high speed
UARTS Enabled (w/ 16550 FIFO), 1 EPP/ECP port (ECP + EPP
mode), and 5V DRAM/3.3V DIMM.
P.B. SRAM
32k x 32
#1 #2 #3 #4
ISA SLOT
#3#2#1
PCI SLOT
DIMM 2
DIMM 1
SIMM BANK 1
SIMM BANK 0
#1
#4
#3
#2
82371 AB
586
CPU
Family
IDE1
FDC
IDE2
KB
BIOS BIOS
RTC
SUPER
I/O Chip
JP3
JP5
1
J17
RST
J19 JP9J18
1
Keylock SPK
JPS2
PRT COM2 COM1
PS/2 KB
Conn.
PS/2 Mouse
Conn.
82437VX
2
1
JP37
ATX PW
JP48
USB
J3J2 J4
1
CT2505
J7
CD IN
1
J23
JP15
IR
J24
IDE LED
82438VX 82438VX
JP13 JP14
P.B. SRAM
32k x 32
Game Port
SPK
OUT MIC IN LINE IN
JP10
JP11
JP12
JP31 JP30 JP36
1
JP43
JP44
JP45
JP46
JP47
TAG
Wave Table Conn
JP50
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
JP3: Display Type
Set JP3 to configure the mainboard for use with either a color or
monochrome monitor.
Monitor Type JP3
Monochrome
EGA/VGA
(default)
JP5: CMOS Clear Jumper
Clear the CMOS memory by momentarily shorting this jumper; then
open the jumper to retain new settings.
CMOS Setting JP5
Retain CMOS data
(default)
Clear CMOS data

6Hardware Setup
JPS2: PS/2 Mouse Function Jumper
Set PS/2 mouse function enabled or disabled.
PS/2 Mouse Function JPS2
Disabled
(default)
Enabled
Note: The IRQ12 is dedicated to the PS/2 mouse when choosing
enabled of PS/2 Mouse Function.

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.
❑Step 1: Frequency Setting
Pentium – 75/90/100 CPU Settings (1.5 x clock)
AMD K5 – PR75/PR90/PR100/PR120/PR133 (1.5 x clock)
P.B. SRAM
32k x 32
586
CPU
Family
JP13 JP14
P.B. SRAM
32k x 32
JP10
JP11
JP12
JP10
JP11
JP12
Pentium – 75/50 MHz
AMD K5 – 75/50 MHz
JP10
JP11
JP12
Pentium – 90/60 MHz
AMD K5 – PR 90/60 MHz
AMD K5 – PR 120/60 MHz
JP10
JP11
JP12
Pentium – 100/66 MHz
AMD K5 – PR 100/66 MHz
AMD K5 – PR 133/66 MHz
Figure 2Ð1Ð1. CPU Jumper Settings
Note: 1. You must equip the CPU with a fan and heat sink for system
stability.
2. AMD K5ÐPR75/90/100 = AMD 5k86(SSA5)ÐP75/90/100.

8Hardware Setup
Pentium – 100/120/133 CPU Settings (2.0 x clock)
Cyrix 6x86/6x86L – P120+/P133+/P150+/P166+CPU Settings
(2.0 x clock)
586
CPU
Family
P.B. SRAM
32k x 32
P.B. SRAM
32k x 32
JP13 JP14
JP12
JP11
JP10
JP12
JP11
JP10
Pentium – 100/50 MHz
Cyrix 6x86/6x86L – P120+/50 MHz
JP12
JP11
JP10
Cyrix 6x86/6x86L – P133+/55 MHz
JP12
JP11
JP10
Pentium – 120/60 MHz
Cyrix 6x86/6x86L – P150+/60 MHz
JP12
JP11
JP10
Pentium – 133/66 MHz
Cyrix 6x86/6x86L – P166+/66 MHz
Figure 2Ð1Ð2. CPU Jumper Settings
Note: 1. You must equip the CPU with a fan and heat sink for system
stability.
2. Cyrix 6x86 Ð P166+has to be matched with 60ns DRAMs.

Hardware Setup 9
Pentium/AMD – 150/166 CPU Settings (2.5 x clock)
586
CPU
Family
P.B. SRAM
32k x 32
P.B. SRAM
32k x 32
JP13 JP14
JP12
JP11
JP10
JP12
JP11
JP10
Pentium – 150/60 MHz
AMD K5 – PR150
JP12
JP11
JP10
Pentium – 166/66 MHz
AMD K5 – PR166
Figure 2Ð1Ð3. CPU Jumper Settings
Note: You must equip the CPU with a fan and heat sink for system
stability.
Pentium – 180/200 CPU Settings (3.0 x clock)
P.B. SRAM
32k x 32
586
CPU
Family
JP13 JP14
P.B. SRAM
32k x 32
JP10
JP11
JP12
JP10
JP11
JP12
Pentium – 180/60 MHz
JP10
JP11
JP12
Pentium – 200/66 MHz
Figure 2Ð1Ð4. CPU Jumper Settings
Note: You must equip the CPU with a fan and heat sink for system
stability.

10 Hardware Setup
❑Step 2: CPU Single/Dual Voltage Setting
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
P54CX, AMD-K5-PRxxxBx, AMD-K5-PRxxxCx, AMD-K5-PRxxxFx,
and Cyrix 6x86. Refer to the following figures to set these CPUsÕ
voltage:
P.B. SRAM
32k x 32
586
CPU
Family
JP48
P.B. SRAM
32k x 32
JP36
1 3
JP43
JP44
JP45
JP46
JP47
1
3
1
3
JP30 JP31
Figure 2Ð2Ð1. Single Voltage 3.3V CPU
P.B. SRAM
32k x 32
586
CPU
Family
JP48
P.B. SRAM
32k x 32
JP36
1 3
JP43
JP44
JP45
JP46
JP47
1
3
1
3
JP30 JP31
Figure 2Ð2Ð2. Single Voltage 3.52V CPU

Hardware Setup 11
Dual Voltage CPU Setting
Dual voltage CPUs are designed to use different voltage for VIO and
VCore and they include Intel P55CX, AMD-K5-PRxxxHx, AMD-K5-
PRxxxJx, AMD-K5-PRxxxKx, AMD K6, Cyrix 6x86L, and Cyrix M2.
Refer to the following figures to set these CPUsÕ voltage:
P.B. SRAM
32k x 32
586
CPU
Family
JP48
P.B. SRAM
32k x 32
JP36
1 3
JP43
JP44
JP45
JP46
JP47
1
3
1
3
JP30 JP31
JP46
JP47
2.5V CPU
JP46
JP47
2.7V – 2.9V CPU
Figure 2Ð2Ð3. Intel P55CX, AMD K5/K6, CYRIX 6X86 L/M2 Dual
Voltage CPU

12 Hardware Setup
Memory Configuration
The mainboard supports two banks of 72-pin SIMM, EDO DRAM, and
two strips of 3.3V/5V Unbuffered DIMM. The mainboard requires
SIMM of at least 70ns access time.
The mainboard supports from 4 to 128 Mbytes with no other restrictions
on memory configurations. You can install SIMM in any combination
without having to rely on a memory configuration table. Memory
configuration is thus ÒTable-FreeÓ in any SIMM bank. You must install
two strips of SIMM modules to complete a bank.
RAM Bank Installation Notice
Due to the RAS line share architecture of VX chipset, the possible
combination of DIMM/SIMM in this mainboard are as one of the
followings:
1. In Bank 0, Bank 1, or Bank 0 & Bank 1
2. In DIMM 1, DIMM 2, or DIMM 1 & DIMM 2
3, In Bank 0 & DIMM 2
4. In Bank 1 & DIMM 1
DIMM Voltage Setting
You must check the voltage of your DIMM before you install it. See
Jumper 37 to configure the proper voltage for DIMM.
Type of DIMM JP37
3.3V Fast-Page Mode, EDO, and
SDRAM
(default)
135
5V Fast-Page Mode and EDO
135

Hardware Setup 13
Cache Configuration
The mainboard has a write-back caching scheme. You can order 256KB
or 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
256KB 32K x32, 2 pcs
on U39, U40
16K x 8
on U25
64 MB
512KB 64K x 32, 2pcs
on U39, U40
16K x 8
on U25
128 MB
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.

14 Hardware Setup
Connectors
Attach the mainboard to case devices, or an external battery, via
connectors on the mainboard. Refer to Figure 1-1 for connector locations
and connector pin positions.
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. You can only use either AT or ATX power.
11 20
JP9/JP50 – ATX Power Supply On/Off Switch Connectors
Due to that the ATX power supplies do not have an On/Off switch,
attach this 2-pin switch from the PC case for turning on or off your
power supply. There are two different types of On/Off switch connectors
in this motherboard: latch type (JP9) and momentary type (JP50). Latch
type is the traditional AT type of On/Off switch and momentary type is a
non-latch (one-touch) type of On/Off switch. You need to choose one or
the other type of these two switches depending on the PC case that you
have. Notice that you have to unplug the ATX power supply connector
before either installing or removing any add-on cards when you use the
momentary type of the On/Off switch.
J28, J29 – COM1/COM2 Connectors
Attach COM1/COM2 device cable to these connectors.

Hardware Setup 15
J7 – CD In Connector
Connect a 4-pin audio cable, which is provided by the CD-ROM
manufacture, from the Audio-out port of the CD-ROM drive to this
connector, and also for transferring the audio signal from the CD-ROM
to the speakers system, connect speakers system audio-in cable to
speaker out jack of this mainboard.
J4 – Creative Wave Table Card Connector
This connector is reserved for Creative wave table ISA cards (i.e.,
AWE32 Upgrade CT-1920). You should be able to plug a Creative wave
table card on ISA bus then connect the cable from the wave table card to
this connector, and then connect the audio-in cable of the speakers
system to the speaker-out jack of this maminboard.
FDC Connector
Attach floppy cable to this connector.
J11 – Game Port
Attach a 15-pin male header device, which meets the game port
specifications (i.e., joystick), to this connector.
J19 – Hardware Reset Control
Attach the Reset switch to J19. Closing the Reset switch restarts the
system.
J24 – HDD LED Connectors
Attach on-board hard disk drive LEDs to this connector. The LED lights
when an HDD is active.
IDE1/IDE2 – On-board Primary/Secondary IDE HDD
Connectors
Attach on-board hard disk drives to these connectors.

16 Hardware Setup
JP15 – IR Connector
Attach a 4-pin infrared device cable to this connector for enabling the
infrared transfer function. This mainboard meets the specification of
ASKIAR and HPSIR.
J17 – Keylock & Power LED Connector
J17 is a connector for a lock that may be installed on the system case for
enabling or disabling the keyboard. J17 also attaches to the caseÕs Power
LED. (Pin 1, 3 for power LED and pin 4, 5 for keylock.)
J26, J27 – PS/2 Mouse, PS/2 Keyboard Connector
Attach PS/2 mouse and PS/2 keyboard cables directly to these connectors
for enabling the mouse and keyboard functions. And also, you need to
enable the PS/2 mouse function by putting the jumper cap on JPS2
jumper.
PRT – Parallel Port Connector
Attach parallel port cable to this connector.
J23: Sleep Switch Connector Enable/Disable
Toggle this jumper to force the system into power saving (Green) mode.
Any hardware IRQ signal makes the system wakeup.
J12 ~ J14 – Speaker Out Jack, MIC In Jack, Line In Jack
J12: attach the cable of the speakersÕ to this jack to enable the speakers.
J13: attach the cable of microphone to this jack.
J14: attach line out cable from the audio device (i.e., stereo system) to
this connector for transferring stereo signal to the Creative sound chip.
J18 – Speaker Connector
Attach the system speaker to connector J18.