SOYO SC-5EA5 Quick start guide

SC-5EA5
SURIA ETEQ 512Kb PB Cache Mainboard
User & Technical Reference Giude
Factory Part # 5EA5/A5C

TableofContents
Chapter1:Introduction……….…………..….………..1
KeyFeatures………………………………..…………………1
UnpackingtheMainboard…………………………………2
ElectrostaticDischargePrecautions……………………….2
MainboardLayoutW/Default Settings……..…………………3
RemarksontheCyrixandIBMP200 CPUs……..………….5
VoltageSettingList……………………………………………5
Chapter2:HardwareSetup.………………………..6
Jumpers…..…………………………………..………………6
JP5:CMOSClearJumper……………..…………………..6
J25:EMIGroundPin……………………………….6
JP16:PCIBusAsynchronous/SynchronousJumper…..7
CPUTypeConfiguration……………………………………8
Step1:FrequencySetting…………………………………..8
P54C/P55C-75/90/100 CPUSettings(1.5xclock)…….8
P54C/P55C-100/120/133 CPUSettings(2.0xclock)….9
P54C/P55C-150/166 CPUSettings(2.5xclock)……..10
P54C/P55C-180/200 CPUSettings(3.0xclock)……..10
3.5x clockCPUSettings(233 MHzCPUs)….……..11
4.0x clockCPUSettings(266 MHzCPUs)…………11
Step2:CPUSingle/DualVoltageSetting……..………12
SingleVoltageCPUSetting……….………………12
DualVoltageCPUSetting………………………..13
MemoryConfiguration……………………………………..13
MemoryConfigurationTable……………………………..14
RAMBankInstallationNotice…………..…………….14
CacheConfiguration……………………………………….14
CacheSizeandRAMLocations………………………….14
Multi I/OPortAddresses…………………………………..15
Connectors…………..………………………………………….15
COM1,COM2-COM1/COM2Connectors…………………15
FDCConnector…………………………………………..…15
J19-HardwareResetControl………………………………..15
J24-HDD LEDConnectors…………………………………15
CN5-IRConnector……………………………………..16
CN2-KeyboardConnector……………………………..16

J17-Keylock&PowerLEDConnector……………………..16
IDE1/IDE2-OnboardPrimary/SecondaryIDEConnectors.16
CN1-PS/2MouseConnector…………………………..16
PRT-ParallelPortConnector…………………………..16
ATPowerConn.-ATpowersupplyconnector……..16
J23:SleepSwitchConnectorEnable/Disable…………….17
CN3-UniversalSerialBusConnectors……………………17
J18 speaker………………………………………………..17
Chapter3:BIOSsetup……..….………..……….……..18
StandardCMOSSetup……….…….…….… … .………19
BIOSFeaturesSetup………….…..………….………21
ChipsetFeaturesSetup…..……..……………..…….…24
PowerManagementSetup ………....………………2 6
PNP/PCIConfigurationSetup…………..… … .………29
LoadSetup Defaults………..………..….……………31
LoadBIOSDefaults………..….………...…..………31
IntegratedPeripherals……………...……….………32
SupervisorPassword...………………..………………34
USERPassword…….………….…….………………35
IDEHDD AutoDetection…….………..…….………36
Appendix……….…………….…………..……….… … ..37
AppendixA:JumperforCyrix/IBMCPU(J100)……..…..37
AppendixB:QuickInstallationGuide..………..….…38

1 Introduction
The EQ82C661X PCI mainboard is a high-performance AT form-factor
system board that supports P54C/P55C family CPUs. You can order
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 90~200 MHz
speeds; Cyrix/IBM CPUs running at PR120+~PR200+speeds;
and AMD K5/K6 CPUs running at PR75 ~ PR233 speeds
Ñ Two kinds of mainboards are available: one is the Normal edition
which supports above listed CPUs and the other is the IBM CPU
attached edition which supports the IBM 6x86 P200+CPU only
ÑSupports SOCKET 7 for upgrade
Ñ Supports P54C/P55C series SMM Mode and CPU Stop Clock
¥ L2 Cache Controller
Ñ Write Back Cache Modes and Direct Mapped Organization
Ñ On-board 512K Pipeline Burst SRAMs Cache
¥ DRAM Controller
Ñ Supports FPM/EDO/Burst EDO/Synchronous Ð DRAM
Ñ Supports 1 stripsof 8/16/32 MB Unbuffered DIMMs
Ñ On-board memory configurations from 4 to 256 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
ÑSupports Universal Serial Bus Ñ USB
¥ Peripheral Controller
Ñ System BIOS built-in NCR805 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

2Introduction
Unpacking the Mainboard
The mainboard package contains:
¥ The EQ82C661X Mainboard
¥ This UserÕs 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
2 2
3 3
1
14
14
54
17 16
18 15
11
1212
13
8
710
9
2
6
Figure 1Ð1. Mainboard Layout
1. ZIF socket 7 (for P54C/P55C) 10. SIMM Bank
2. EQ82C661X Chipset 11. Floppy Connector
3. Pipelined Burst SRAM 12. IDE1/IDE2 Connector
4. Super I/O Chip 13. Parallel Port Connector
5. PnP FLASH BIOS 14. COM1/COM2 Connector
6. TAG SRAM 15. AT Power Connector
7. ISA Slots 16. KB Connector
8. PCI Slots 17. PS/2 Mouse Connector
9. Unbuffered DIMM Bank 18. 3 Volt. Lithium Battery

4Introduction
Figure1-2.MainboardDefault Setting
Important:Makesurethesystem iswell ventilatedto prevent
overheating andensuresystemstability.
Default settingsareasfollows:Pentium133MHz(P54C)CPU,512K
PipelinedBurstcache,On-boardPCIE- IDE Enabled,2highspeed
UARTSEnabled(w/16550 FIFO),1EPP/ECPport(ECP+EPP mode),
5V DRAM/3.3V DIMM,andATpowersupply.
11
USB
JP25
1IR
CN5
2
4
JP31
586CPU
Family
JP13
JP14
1
JP16
JP12
JP11
JP10
EQ6619
JP304
2
64Kx32 64Kx32
EQ6617 EQ6617
JP5
JP32
CN1CN2
FLASHBIOS
EQ6618
J100
JP15
(KB)
(PS/2

Introduction 5
Remarkson the Cyrixand IBMP200
+
CPUs
PleasenotethatifyouuseaCyrixorIBMP200+CPU,youwill havetosetthe
frequencyto75MHz.Youwill alsohavetosetJP16,thePCIbusfrequency
jumpertoasynchronoustohavethePCIbusrunon32MHz,inordertoavoid
problemswithadd-oncards.IfyouchoosetorunthePCIbusonahigher
frequency,pleaseuseonlyhigh-endadd-oncardsthatarespecifiedtofunction
onhigherbusfrequencies.Pleasenotethatusinga75MHzbusclockalsoplaces
higherdemandsontheDRAMmain-memory,thereforeonlyusehigh-end
SIMM/DIMM moduleswhenthisisthecase.
Voltage settingslist
Jumpers30,31 and32 settheprocessorvoltage.Ifyouareusingasinglevoltage
processorclosejp31 andopenjp30.Jp31 shortstheprocessorVcorevoltagepins
totheViopinswhenclosed.IfyouuseadualvoltageCPU,openjp31 andclose
jp30.
Jp32 setsthevoltage,pleaserefertothefollowingtable:
voltage JP32
1-2 3-4 5-6 7-8
3.5Vclose close close close
3.4Vclose close closeopen
3.3Vclose closeopenclose
3.2Vclose closeopenopen
3.1Vcloseopenclose close
3.0Vcloseopencloseopen
2.9Vcloseopenopenclose
2.8Vcloseopenopenopen
2.7Vopenclose close close
2.6Vopenclose closeopen
2.5Vopencloseopenclose
2.4Vopencloseopenopen
2.3Vopenopenclose close
2.2Vopenopencloseopen
2.1Vopenopenopenclose
2.0Vopenopenopenopen

2 Hardware Setup
This chapter is designed for Normal edition mainboard use only and it
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
J25: EMI Ground Pin
J25 is designed for eliminating the EMI signals. Short or open J25 when
is needed.

Hardware Setup 7
JP16: PCI Bus Asynchronous/Synchronous Jumper
Asynchronous and synchronous (default) PCI bus frequency settings are
available.
PCI Bus Setting JP16
Asychronous
1
Synchronous
1
Divides the host bus by 2 to get the Asynchronous setting, and sets the
PCI bus on 32MHz to get the synchronous setting. Set JP16 to
Synchronous mode when the system is unstable.
Host Bus
(CPU Bus) PCI Bus Frequency (Synchronous) PCI Bus Frequency (Asynchronous)
50 MHz* 25 MHz 32 MHz
55 MHz* 27.5 MHz 32 MHz
60 MHz 30 MHz 32 MHz
66 MHz 33.3 MHz 32 MHz
75 MHz** 37.5 MHz 32 MHz
*: Do not use Asynchronous setting when the host bus frequency is
50MHz or 55MHz.
**: Do not use Synchronous setting when the host bus frequency is 75
MHz.

8Hardware Setup
CPU Type Configuration
This section is designed for normal edition manboard use only and also
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)
EQ6619
JP14
JP13
586
CPU
Family
EQ6618
1
JP12
JP11
JP10
Pentium – 75/50 MHz
AMD K5 – PR 75/50MHz
Pentium – 90/60 MHz
AMD K5 – PR 90/60MHz
AMD K5 – PR 120/60 MHz
1
JP12
JP11
JP10
1
JP12
JP11
JP10
Pentium – 100/66 MHz
AMD K5 – PR 100/66 MHz
AMD K5 – PR 133/66 MHz
1
JP12
JP11
JP10
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= AMD 5k86(SSA5)ÐP75/90.

EQ6619
EQ6618
1
1
1
Figure2-1-2.CPUJumperSettings
stability.
9
HardwareSetup
JP11
JP12
JP10
1
1
JP11
JP12
JP10
JP11
JP12
JP10
JP11
JP12
JP10
JP11
JP12
JP10
JP14
JP13
JP11
JP12
JP10
1

10 Hardware Setup
Pentium– 150/166 CPU Settings (2.5 x clock)
AMD K5/K6 – PR166 CPU Setting
JP14
JP13
586
CPU
Family
EQ6618
1
JP12
JP11
JP10
1
JP12
JP11
JP10
Pentium – 150/60 MHz
Pentium – 166/66 MHz
AMD K5/K6 – PR166
1
JP12
JP11
JP10
EQ6619
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)
AMD K6 – PR200 CPU Setting
JP14
JP13
586
CPU
Family
EQ6618
1
JP12
JP11
JP10
1
JP12
JP11
JP10
Pentium – 180/60 MHz
Pentium – 200/66 MHz
1
JP12
JP11
JP10
EQ6619
Figure 2Ð1Ð4. CPU Jumper Settings
Note: You must equip the CPU with a fan and heat sink for system
stability.

Figure2-1-2.CPUJumperSettings
stability.
11
HardwareSetup
Figure2-1-2.CPUJumperSettings
stability.
Figure2-1-3.CPUJumperSettings
stability.
1
JP11
JP12
JP10
1
JP11
JP12
JP10
JP14
JP13
JP14
JP13
JP15

586
Family
CPU
JP312
4JP304
2
JP32
12
78
Figure2-2-1.SingleVoltage3.3VCPU
Figure2-2-2.SingleVoltage3.5VCPU(Default)
586
Family
CPU
JP312
4JP30 4
2
JP32
12
78
SinglevoltageCPUsusethesamevoltageforbothVioandVcore.The
CPUsthatfall intothiscategoryare:P54CX,AMD-K5andtheCyrix
6x86.Refertothefollowingfigurestoset thevoltagefortheseCPUs:

586
Family
CPU
JP312
4JP304
2
3.2VCPU
2.9VCPU
2.8VCPU
Figure2-2-3DualVoltageCPU
Note:Duetovarying desings,pleaseask yourdealerforthe correct
voltagesettingsforyour specificCPU.
DualvoltageCPUsaredesignedtousedifferentvoltagesforVioand
Vcore.TheyincludeP55CXandtheCyrix 6x86L/6x86MX.Refer
tothefollowingfiguretoset thevoltagefortheseCPUs:
JP32
2.1VCPU

1.InBank1
2.InBank2
3.InBank1& Bank2
4.InDIMM
5.InBank2&DIMM
Cache SizeCache RAMTAGRAM
512KB
Cacheable
Range

HardwareSetup 15
MultiI/OPort Addresses
Default settingsformulti I/Oportaddressesareshowninthetablebelow.
PortI/OAddress IRQStatus
LPT1* 378H7ECP+EPP
COM1 3F8H4
COM2 2F8H3
Ifdefault I/OportaddressesconflictwithotherI/Ocards(e.g.sound cards
orI/Ocards),youmustadjustoneoftheI/Oaddressestoavoidaddress
conflict.(YoucanadjusttheseI/OaddressesfromtheBIOS)
Note:Somesound cardshave adefault IRQsetting forIRQ7,which
mayconflictwithprinting functions.Ifthisoccurs do notusesound
cardfunctionsatthesametimeyou print.
Connectors
Attachthemainboardtocasedevicesviaconnectorson themainboard.Referto
Figure1-1forconnectorlocationsand connectorpinpositions.
COM1,COM2–COM1/COM2Connectors
AttachCOM1/COM2devicetotheseconnectors.
FDC Connector
Attachfloppycabletothisconnector.
J19 –HardwareResetControl
AttachtheresetswitchtoJ19.ClosingtheResetswitchrestartsthesystem.
J24 –HDD LEDConnector
AttachthecableofharddiskdriveLEDtothisconnector.TheLEDlightswhen
anHDD isactive.

16 HardwareSetup
CN5-IRConnector
Attacha5-pininfrareddevicecabletothisconnectorforenablingtheinfrared
transferfunction.ThismainboardmeetsthespecificationofASKIRand HPSIR.
CN2-KeyboardConnector
A5-pinfemaleDINkeyboardconnectorislocatedattherearoftheboard.Plug
thekeyboardjackintothisconnector.
J17 -Keylock &PowerLEDConnector
J17 isaconnectorforalockthatmaybeinstalledonthesystemcaseforenabling
ordisablingthekeyboard.J17 alsoattachestothecase’sPowerLED.(Pin1,3for
powerLEDand pin4,5forkeylock.)
IDE1/IDE2-OnboardPrimary/SecondaryIDEHDD Connectors
Attachcableofharddiskdrivestotheseconnectors.
CN1-PS/2MouseConnector
AttachPS/2mousecabletothisconnector.
PRT-ParallelPort Connector
Attachparallelportcabletothisconnector.
PW-ATPowerSupplyConnector
Themainboardrequiresapowersupplywithatleast200 wattsand a“power
good”signal.PWhastwo6-pinmaleheaderconnectors.Plugthedualconnectors
fromthepowerdirectlyontotheboardconnectorwhilemakingsuretheblack
leadsareinthecenter.

HardwareSetup 17
J23:Sleep Switch ConnectorEnable/Disable
Togglethisjumpertoforce thesystemintopowersaving(green)mode.
AnyhardwareIRQsignalwill causethesystemtowakeup.
CN3:UniversalSerialBusConnectors
Attacha9pinUSBcabletotheseconnectorstoconnectexternalUSB
devicestothemainboard.
J18:SpeakerConnector
Attachtheconnectorfromthespeakerinyourcasetothisjumper.