5EAS5
P54C/P55C PCI Mainboard
User’ s Guide &
Technical Reference
SOYO
About This Guide
TM
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Table of Contents
Chapter 1: Introduction… … … .… … … … ..… .… … … ..1
Key Features………………………………..…………………1
Unpackin g the Ma in board… … … …………… … …………2
Electrostatic Disch arge Preca utions……………… ……… .2
Mainboard Layout W/ Default Settings……..…………………3
Remarks on the Cyrix a n d IBM P200 CPUs……..…………. 5
Voltage Setting List…………………………………… ……… 5
Chapter 2: Hardware Setup.… … … … … … … … … ..6
Jumpers… ..…… …………………… ………..………………6
JP5: CMOS Clea r Jumper ………… …. .…………………..6
J25: EMI Ground Pin… … … … … … … … … … … … .6
JP16: PCI Bus Asyn chronous/Syn ch r on ous Jumper… ..7
CPU Type Configuration………… ……… … … … …………8
Step 1: Frequency Setting………………………………….. 8
P54C/P55C-75/90/100 CPU Settings (1.5 x clock)…….8
P54C/P55C-100/120/133 CPU Settings (2.0 x clock)….9
P54C/P55C-150/166 CPU Set tings (2.5 x clock)……..10
P54C/P55C-180/200 CPU Set tings (3.0 x clock)……..10
3. 5x clock CPU Settin gs (233 MHz CPUs)….……..11
4.0x clock CPU Settin gs (266 MHz CPUs)…………11
Step 2: CPU Single/Dua l Voltage Settin g……..………12
Single Voltage CPU Sett ing……… . … ……………12
Dual Volt age CPU Settin g… …………… … … …..13
Memor y Configur ation … ………… … …………… ………..13
Memory Configuration Table……………………………..14
RAM Bank Installation Notice……… …..…… ……… .14
Cache Confi gur at ion… … ………………… … …………….14
Cach e Size and RAM Locations……………… ………….14
Multi I/O Por t Addr esses…… …………… … …………….. 15
Connectors…………..………………………………………….15
COM1, COM2-COM1/COM2 Connectors…………………15
FDC Connect or…………………………………………..…15
J19-Hardware Reset Control………………………………..15
J24-HDD LED Con nectors…………………………………15
CN5-IR Connector … … … … … ……………………… ..16
CN2-Keyboar d Connector… … … … …… ……………..16
J17-Keylock & Power LED Connector……………………..16
IDE1/IDE2 - Onboard Primary/Secondary IDE Connectors.16
CN1-PS/2 Mouse Con nector… ……… … … … …… …. .16
PRT-Paral lel Por t Connector … … …………… … … …..16
AT Power Con n. - AT power supply conn ector……. .16
J23: Sl eep Switch Connector En able/Disable…………….17
CN3-Uni versal Serial Bus Connectors……………………17
J18 speaker……… ………………………………………. .17
Chapter 3: BIOS setup… … .. … .… … … ..… … … .… … ..18
Stan dard CMOS Setup… … … .… … .… … .… … .… … … 19
BIOS Feat ures Setup… … … … .… ..… … … … .… … … 21
Chipset Features Setup… ..… … ..…… … … … ..… … .… 24
Powe r Manage m en t Setu p … … … .... … … … … … … 26
PNP/PCI Configuration Setup… … … … ..… … .… … … 29
Load Setup Defaults… … … ..… … … ..… .… … … … … 31
Load BIOS Defaults… … … ..… .… … … ...… ..… … … 3 1
Integ rat ed Periph erals… … … … … ...… … … .… … … 32
Supervi sor Password... … … … … … … ..… … … … … … 34
USER Passwor d … … . … … … … . … … . … … … … … … 35
IDE HDD Auto De tection… … . … … … . .… … .… … … 36
App endix… … … .… … … … … .… … … … ..… … … .… … ..37
Appendix A: Jumper for Cyri x/IBM CPU(J100)… …..…. .37
Appendix B : Quick In stalla tion Guide. .……… ..… .…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
Ñ Supports 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
Ñ Supports 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
2 Introduction
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
17 16
5
4
15
9
10
7
18
8
13
11
14
14
1212
2
2 2
2
1
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
6
3 3
4
Introduction
Default settings are as follows: Pentium 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
1
CN1
CN2
FLASH BIOS
JP32
JP31
2
4
JP15
JP5
JP16
JP12
JP11
JP10
586CPU
Family
1
IR
1
CN5
EQ6619
EQ6618
JP14
JP30
JP13
USB
J25
EQ6617
64Kx32
4
2
(PS/2
EQ6617
64Kx32
(KB)
J100
Figure 1-2. Mainboard Default Setting
Important: Make sure the system is well ventilated to prevent
overheating and ensure system stability.
Introduction 5
Remarks on the Cyrix and IBM P200+ CPUs
Please note that if you use a Cyrix or IBM P200+ CPU, you will have to set the
frequency to 75MHz. You will also have to set JP16, the PCI bus frequency
jumper to asynchronous to have the PCI bus run on 32MHz, in order to avoid
problems with add-on cards. If you choose to run the PCI bus on a higher
frequency, please use only high-end add-on cards that are specified to function
on higher bus frequencies. Please note that using a 75MHz bus clock also places
higher demands on the DRAM main-memory, therefore only use high-end
SIMM/DIMM modules when this is the case.
Voltage settings list
Jumpers 30, 31 and 32 set the processor voltage. If you are using a single voltage
processor close jp31 and open jp30. Jp31 shorts the processor Vcore voltage pins
to the Vio pins when closed. If you use a dual voltage CPU, open jp31 and close
jp30.
Jp 32 sets the voltage, please refer to the following table:
voltage JP32
1-2 3-4 5-6 7-8
3.5V close close close close
3.4V close close close open
3.3V close close open close
3.2V close close open open
3.1V close open close close
3.0V close open close open
2.9V close open open close
2.8V close open open open
2.7V open close close close
2.6V open close close open
2.5V open close open close
2.4V open close open open
2.3V open open close close
2.2V open open close open
2.1V open open open close
2.0V open open open open
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
1
Retain CMOS data
(default)
1
Clear CMOS data
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
1
Asychronous
1
Synchronous
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.
8 Hardware 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)
1
JP12
JP11
JP10
586
EQ6619
EQ6618
CPU
Family
JP14
JP13
Pentium – 75/50 MHz
AMD K5 – PR 75/50MHz
JP12
JP11
JP10
1
Pentium – 90/60 MHz
AMD K5 – PR 90/60MHz
AMD K5 – PR 120/60 MHz
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.
Hardware Setup
9
JP12
JP11
JP10
EQ6619
1
EQ6618
JP14
JP13
Figure 2-1-2. CPU Jumper Settings
stability.
JP12
JP11
JP10
JP12
JP11
JP10
JP12
JP11
JP10
JP12
JP11
JP10
JP12
JP11
JP10
1
1
1
1
1
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