5EAS5
P54C/P55C PCI Mainboard
User’ s Guide &
Technical Reference
SOYO
About This Guide
TM
Th is User’s Guide is for assisting system manufactu rers and end users in setting
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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
10 Hardware Setup
Pentium– 150/166 CPU Settings (2.5 x clock)
AMD K5/K6 – PR166 CPU Setting
1
JP12
JP11
JP10
EQ6619
Pentium – 150/60 MHz
1
JP12
JP11
JP10
JP14
JP13
EQ6618
Pentium – 166/66 MHz
AMD K5/K6 – PR166
JP12
JP11
JP10
1
586
CPU
Family
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
1
JP12
JP11
JP10
586
CPU
Family
EQ6619
JP14
JP13
EQ6618
Pentium – 180/60 MHz
1
JP12
JP11
JP10
Pentium – 200/66 MHz
1
JP12
JP11
JP10
Figure 2Ð1Ð4. CPU Jumper Settings
Note: You must equip the CPU with a fan and heat sink for system
stability.
Hardware Setup
Figure 2-1-2. CPU Jumper Settings
Figure 2-1-2. CPU Jumper Settings
stability .
stability .
JP12
JP11
JP10
11
1
JP14
JP13
stability.
1
JP12
JP11
JP10
JP14
JP15
JP13
Figure 2-1-3. CPU Jumper Settings
Single voltage CPUs use the same voltage for both Vio and Vcore. The
CPUs that fall into this category are : P54CX , AMD-K5 and the Cyrix
6x86. Refer to the following figures to set the voltage for these CPUs:
JP32
7
8
1
2
586
2
4
CPU
Family
JP30
4
2
JP31
Figure 2-2-1. Single Voltage 3.3V CPU
JP32
7
8
1
2
586
2
4
CPU
Family
JP30
4
2
JP31
Figure 2-2-2. Single Voltage3.5V CPU (Default)
Dual voltage CPUs are designed to use different voltages for Vio and
Vc ore. They include P55CX and the Cyrix 6x86L / 6x86MX. Refer
to the following figure to set the voltage for these CPUs:
3.2V CPU
JP32
2.9V CPU
2.8V CPU
586
JP31
CPU
Family
2
4
JP30
2.1V CPU
4
2
Figure 2-2-3 Dual Voltage CPU
Note: Due to varying desings, please ask your dealer for the correct
voltage settings for your specific CPU.
1. In Bank 1
2. In Bank 2
3. In Bank 1 & Bank 2
4. In DIMM
5. In Bank 2& DIM M
Cache Size
512KB
Cache RAM TAG RAM
Cacheable
Range
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
LPT 1*
COM1
COM2
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.
378H 7 ECP + EPP
3F8H 4
2F8H 3
COM1, COM2 – COM1/COM2 Connectors
Attach COM1/COM2 device to these connectors.
FDC Connector
Attach floppy cable to this connector.
J19 – Hardware Reset Control
Attach the reset switch to J19. Closing the Reset switch restarts the system.
J24 – HDD LED Connector
Attach the cable of hard disk drive LED to this connector. The LED lights when
an HDD is active.
16
Hardware Setup
CN5 - IR Connector
Attach a 5-pin i nfrared device cable to t his connector for enabling the infrared
transfer function. This mainboard meets the specification of ASKIR and HPSIR.
CN2 - Keyboard Connector
A 5-pin female DIN keyboar d connector is located at the rear of the board. Plug
the keyboard jack into this connector.
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 case’s Power LED. (Pin 1,3 for
power LED and pin 4,5 for keylock.)
IDE1/IDE2 - Onboard Primary/Secondary IDE HDD Connectors
Attach cable of hard disk drives to these connectors.
CN1 - PS/2 Mouse Connector
Attach PS/2 mouse cable to this connector.
PRT - Parallel Port Connector
Attach parallel port cable to this connector.
PW - AT Power Supply Connector
The mainboard requires a power supply with at least 200 watts and a “power
good” signal. 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.
Hardware Setup
J23: Sleep Switch Connector Enable/Disable
Toggle this jumper to force the system into power saving (green) mode.
Any hardware IRQ signal will cause the system to wake up.
CN3: Universal Serial Bus Connectors
Attach a 9 pin USB cable to these connectors to connect external USB
devices to the mainboard.
J18: Speaker Connector
Attach the connector from the speaker in your case to this jumper.
17
3 BIOS Setup
The mainboardÕs BIOS setup program is the ROM PCI/ISA BIOS from
Award Software Inc. Enter the Award BIOS programÕs Main Menu as
follows:
1. Turn on or reboot the system. After a series of diagnostic checks,
you are asked to press DEL to enter Setup.
2. Press the <DEL> key to enter the Award BIOS program and the
main screen appears:
STANDARD CMOS SETUP
BIOS FEATURES SETUP
CHIPSET FEATURES SETUP
POWER MANAGEMENT SETUP
PNP/PCI CONFIGURATION
LOAD SETUP DEFAULTS
LOAD BIOS DEFAULTS
Esc : Quit ↑ ↓ → ← : Select Item
F10 : Save & Exit Setup (Shift) F2 : Change Color
3. Choose an option and press <Enter>. Modify the system parameters
to reflect the options installed in the system. (See the following
sections.)
4. Press <ESC> at anytime to return to the Main Menu.
5. In the Main Menu, choose ÒSAVE AND EXIT SETUPÓ to save
your changes and reboot the system. Choosing ÒEXIT WITHOUT
SAVINGÓ ignores your changes and exits the program.
ROM PCI/ISA BIOS
CMOS SETUP UTILITY
AWARD SOFTWARE, INC.
INTEGRATED PERIPHERALS
SUPERVISOR PASSWORD
USER PASSWORD
IDE HDD AUTO DETECTION
SAVE & EXIT SETUP
EXIT WITHOUT SAVING
Time, Date, Hard Disk Type...
The Main Menu options of the Award BIOS are described in the sections
that follow.
BIOS Setup 19
Standard CMOS Setup
Run the Standard CMOS Setup as follows.
1. Choose ÒSTANDARD CMOS SETUPÓ from the Main Menu. A
screen appears.
Date (mm:dd:yy) : Fri, Feb 1 1995
Time (hh:mm:ss) : 7 : 30 : 33
HARD DISKS TYPE SIZE CYLS HEAD PRECOMP LANDZ SECTOR MODE
Primary Master : AUTO 0 0 0 0 0 0 AUTO
Primary Slave : None 0 0 0 0 0 0 ---Secondary Master : None 0 0 0 0 0 0 ---Secondary Slave : None 0 0 0 0 0 0 ----
Drive A : 1.44M, 3.5 in.
Drive B : None
Video : EGA/VGA
Halt On : All Errors
Esc : Quit ↑ ↓ → ← : Select Item PU/PD/+/– : Modify
F11 : Help (Shift) F2 : Change Color F3 : Toggle Calendar
2. Use arrow keys to move between items and select values. Modify
selected fields using PgUp/PgDn/+/Ð keys. Some fields let you enter
values directly.
Date (mm/dd/yy) Type the current date.
ROM PCI/ISA BIOS
STANDARD CMOS SETUP
AWARD SOFTWARE, INC.
Extended Memory: 3328K
Base Memory: 640K
Other Memory: 128K
Total Memory: 4096K
Time (hh:mm:ss) Type the current time.
Primary
(Secondary)
Master & Slave
First, choose the type of hard disk that you
already installed:
Auto Ð BIOS detects hard disk type
automatically (default)
1 ~ 46 Ð Selects standard hard disk type
User Ð User defines the type of hard disk.
Next, choose hard disk mode:
Auto Ð BIOS detects hard disk mode
automatically (default)
Normal Ð Normal IDE hard disk (smaller than
528MB)
LBA Ð EnhancedÐIDE hard disk (larger
than 528MB)
20 BIOS Setup
Primary
(Secondary)
Master & Slave
(Continued)
Drive A & B Choose 360KB , 5 1/4 in.,
Video Choose Monochrome, Color 40x25,
Halt On When BIOS detects system errors, this function
3. When you finish, press the <ESC> key to return to the Main Menu.
Large Ð Large IDE hard disk (for certain
hard disk)
Note: If you have any questions on your hard
disk type or mode, ask your hard disk
provider or previous user for details.
1.2MB , 5 1/4 in.,
720KB , 3 1/2 in.,
1.44M , 3 1/2 in.(default),
2.88 MB, 3 1/2 in. or
Not installed
VGA/EGA (default), Color 80x25
will stop the system. Choose one of the
following options to make system halt.
All Errors (default) All, But Diskette
No Errors All, But Keyboard
All, But Disk/Key
BIOS Setup 21
BIOS Features Setup
Run the BIOS Features Setup as follows.
1. Choose ÒBIOS FEATURES SETUPÓ from the Main Menu and a
screen with a list of items appears. (The screen below shows the
BIOS default settings.)
CPU Internal Cache : Enabled
External Cache : Enabled
Quick Power on Self Test : Enabled
Boot Sequence : A,C,SCSI
Swap Floppy Drive : Disabled
Boot Up NumLock Status : On
Typematic Rate Setting : Disabled
Typematic Rate (Chars/Sec) : 6
Typematic Delay (Msec) : 250
Security Option : Setup
IDE Second Channel Control : Enabled
PS/2 Mouse Function Control: Disabled
PCI/VGA Palette Snoop : Disabled
OS Select for DRAM >64MB : Non-OS2
2. Use the arrow keys to move between items and to select values.
Modify the selected fields using the PgUp/PgDn/+/Ð keys. <F> keys
are explained below:
<F1>: ÒHelpÓ gives options available for each item.
Shift <F2>: Change color.
<F5>: Get the old values. These values are the values with
which the user started the current session.
<F6>: Load all options with the BIOS Setup default values.
<F7>: Load all options with the Power-On default values.
ROM PCI/ISA BIOS
BIOS FEATURES SETUP
AWARD SOFTWARE, INC.
Video BIOS Shadow : Enabled
C8000-CBFFF Shadow : Disabled
CC000-CFFFF Shadow : Disabled
D0000-D3FFF Shadow : Disabled
D4000-D7FFF Shadow : Disabled
D8000-DBFFF Shadow : Disabled
DC000-DFFFF Shadow : Disabled
ESC : Quit ↑ ↓ → ←: Select Item
F1 : Help PU/PD/+/– : Modify
F5 : Old Values (Shift)F2 : Color
F6 : Load BIOS Defaults
F7 : Load Setup Defaults
A short description of screen items follows:
CPU Internal
Cache
This option enables/disables the CPUÕs internal
cache. (The Default setting is Enabled.)
External Cache This option enables/disables the external cache
memory. (The Default setting is Enabled.)
Quick Power
Enabled provides a fast POST at boot-up .
On Self Test
22 BIOS Setup
Boot Sequence Choose the boot device sequence as your need. For
example, ÒA, C, SCSIÓ means BIOS will look for an
operating system first from drive A, drive C, then
SCSI device. Options of this function are:
A, C, SCSI
C, A, SCSI
C, CDÐROM, A
CDÐROM, C, A
D, A, SCSI
E, A, SCSI
F, A, SCSI
SCSI, A, C
SCSI, C, A
C only.
Swap Floppy
Drive
Boot Up Num
Lock Status
Typematic Rate
Setting
Typematic Rate
(Chars/Sec)
Typematic
Delay (Msec)
Security Option Choose Setup or System. Use this feature to prevent
Enabled changes the sequence of the A: and B:
drives. (The Default setting is Disabled.)
Choose On or Off. On puts numeric keypad in Num
Lock mode at boot-up. Off puts this keypad in arrow
key mode at boot-up.
Enable this option to adjust the keystroke repeat rate.
Choose the rate a character keeps repeating.
Choose how long after you press a key that a
character begins repeating.
unauthorized system boot-up or use of BIOS Setup.
ÒSystemÓ Ð Each time the system is booted the
password prompt appears.
ÒSetupÓÐ If a password is set, the password prompt
only appears if you attempt to enter the Setup
program.
BIOS Setup 23
IDE Second
Channel
Control
PS/2 Mouse
Function
Control
PCI/VGA
Palette Snoop
OS Select for
DRAM >64MB
Video or
Adapter BIOS
Shadow
3. After you have finished with the BIOS Features Setup program,
press the <ESC> key and follow the screen instructions to save or
disregard your settings.
Default setting is Enabled. Choose Disabled when
you need to turn off the onboard IDE second
channel.
Default setting is Disabled. You need to enable this
function when the PS/2 mouse is attached.
Enabled: The color of the monitor may be incorrect
if uses with MPEG card. Enable this
option to make the monitor normal.
Disabled: Default setting.
OS2 Ð Choosing this when you are using OS/2
operation system.
Non-OS/2 Ð Choosing this when you are using no-
OS/2 operation system.
BIOS shadow copies BIOS code from slower ROM
to faster RAM. BIOS can then execute from RAM.
These 16K segments can be shadowed from ROM to
RAM. BIOS is shadowed in a 16K segment if it is
enabled and it has BIOS present.
24 BIOS Setup
Chipset Features Setup
The Chipset Features Setup option changes the values of the chipset
registers. These registers control system options in the computer.
Note: Change these settings only if you are familiar with the Chipset.
Run the Chipset Features Setup as follows.
1. Choose ÒCHIPSET FEATURES SETUPÓ from the Main Menu and
the following screen appears. (The screen below shows default
settings.)
DRAM Auto Configuration : 60 ns
DRAM Timing Control : Auto
Read Pipeline : Disabled
Write Pipeline : Enabled
Video BIOS Cacheable : Disabled
System BIOS Cacheable : Disabled
Memory Hole At 15Mb Addr.: Disabled
OnChip USB : Disabled
ROM PCI/ISA BIOS
CHIPSET FEATURES SETUP
AWARD SOFTWARE, INC.
ESC : Quit ↑ ↓ → ←: Select Item
F1 : Help PU/PD/+/– : Modify
F5 : Old Values (Shift)F2 : Color
F6 : Load BIOS Defaults
F7 : Load Setup Defaults
2. Use the arrow keys to move between items and select values.
Modify selected fields using the PgUp/PgDn/+/Ð keys.
A short description of screen items follows:
DRAM Auto
Configuration
Choose 60ns (default) or 70ns when the
DRAM Timing Control needs to be set to
Auto; and; when choose Disabled, the
DRAM Timing Control can be set to
Normal, Medium, Fast, or Turbo.
DRAM Timing Control Choose Auto, Normal, Medium, Fast, or
Turbo. BIOS sets the DRAM Timing
automatically when this function is set to
Auto. Normal is the slowest and you must
check the system stability before you
change to the Fast of Turbo setting,
otherwise it should be on Auto.
BIOS Setup 25
SDRAM Cycle Length 2 (default). This function is shown only
when uses SDRAM.
Read Pipeline Use the default setting.
Write Pipeline Use the default setting.
Video BIOS Cacheable Disabled Ð The ROM area F0000H-
FFFFFH is not cached.
Enabled Ð The ROM area F0000H-
FFFFFH is cacheable if cache
controller is enabled.
System BIOS Cacheable Disabled Ð The video BIOS C0000H-
C7FFFH is not cached.
Enabled Ð The video BIOS C0000H-
C7FFFH is cacheable if cache
controller is enabled.
Memory Hole At 15Mb
Addr
OnChip USB Default is Disabled. Enable this function
USB Keyboard Support Enable this function when you use the
3. After you have finished with the Chipset Features Setup, press the
<ESC> key and follow the screen instructions to save or disregard
your settings.
Choose Enabled or Disabled (default).
Some interface cards will map their ROM
address to this area. If this occurs, you
should select Enabled, otherwise use
Disabled.
when you use the USB device.
USB keyboard, but notice that you need to
use the regular keyboard first before
getting in the BIOS setup.
26 BIOS Setup
Power Management Setup
The Power Management Setup option sets the systemÕs power saving
functions.
Run the Power Management Setup as follows.
1. Choose ÒPOWER MANAGEMENT SETUPÓ from the Main Menu
and a screen with a list of items appears.
Power Management : Disabled
PM Control by APM : Yes
Video Off Option : Suspend -> Off
Video Off Method : V/H SYNC+Blank
Conserve Mode : Disabled
** PM Timers **
HDD Power Down : Disabled
Doze Mode : Disabled
Suspend Mode : Disabled
** PM Events **
VGA : OFF
LPT & COM : LPT/COM
HDD & FDD : ON
DMA/master : OFF
Primary INTR : ON
IRQ 3 (COM 2) : Primary
IRQ 4 (COM 1) : Primary
2. Use the arrow keys to move between items and to select values.
Modify the selected fields using the PgUp/PgDn/+/- keys.
ROM PCI/ISA BIOS
CMOS SETUP UTILITY
POWER MANAGEMENT SETUP
** Power Down & Resume Events **
IRQ 5 (LPT 2) : Primary
IRQ 6 (Floppy Disk) : Primary
IRQ 7 (LPT 1) : Primary
IRQ 8 (RTC Alarm) : Disabled
IRQ 9 (IRQ2 Redir) : Secondary
IRQ 10 (Reserved) : Secondary
IRQ 11 (Reserved) : Secondary
IRQ 12 (PS/2 mouse) : Primary
IRQ 13 (Coprocessor) : Primary
IRQ 14 (Hard Disk) : Primary
IRQ 15 (Reserved) : Disabled
ESC : Quit ↑ ↓ → ←: Select Item
F1 : Help PU/PD/+/– : Modify
F5 : Old Values (Shift)F2 : Color
F6 : Load BIOS Defaults
F7 : Load Setup Defaults
A short description of selected screen items follows:
Power
Management
Options are as follows:
User Define Ð LetÕs you define the HDD and
system power down times.
Disabled Ð Disables the Green PC Features.
Min Saving Ð Doze timer = 1 Hour
Suspend timer = 1 Hour
HDD Power Down = 15 Min
Max Saving Ð Doze timer = 10 Sec
Suspend timer = 10 Sec
HDD Power Down = 1 Min
BIOS Setup 27
PM Control by
APM
Video Off Option Susp, Stby→off:Video off when the system
Video Off Method Choose V/H Sync+Blank (default), Blank
Conserve Mode Use the default setting.
HDD Power Down When the set time has elapsed, the BIOS sends a
Choose Yes (default) or No. APM stands for
Advanced Power Management. To use APM,
you must run Òpower.exeÓ under DOS v6.0 or
later version.
runs into Suspend or Standby
mode.
All Modes→off: Video off in all modes.
Always On: Video never off.
Suspend→off: Video off when system runs
into the suspend mode.
screen, or DPMS for the selected PM mode.
command to the HDD to power down, which
turns off the motor. Time is adjustable from 1 to
15 minutes. The default setting is Disabled.
Some older model HDDs may not support this
advanced function.
Doze Mode When the set time has elapsed, the BIOS sends a
command to the system to enter doze mode
(system clock drops to 33MHz). Time is
adjustable from 10 seconds to 1 Hour.
Suspend Mode The default is Disabled. Only an SL-Enhanced
(or SMI) CPU can enter this mode. Time is
adjustable from 10 seconds to 1 Hour. Under
Suspend mode, the CPU stops completely (no
instructions are executed.)
VGA Choose Off (default) or On to disable or enable
the power management.
28 BIOS Setup
LPT & COM Choose LPT/COM (default) or LPT (COM) to
enable the power management timer. Choose
NONE to disable the power management timer.
HDD &FDD Choose On (default) to enable the power
management timer, or Off to disable the power
management timer.
DMA/master Choose Off (default) or On. If you choose the
system ÒOffÓ, will not monitor the signal of
DMA/master; and when you choose ÒOnÓ, the
system will not have SMI signal until the master
is finished while the master is working.
Primary INTR When On (default) is chosen, you can choose
any IRQ #.
IRQ# When set at ÒPrimaryÓ the processor will power
down only after the BIOS detects a Òno IRQ
activityÓ during the time specified by the
Suspend time. If set at ÒSecondary eventÓ the
system will distinguish whether an interrupt
accesses and I/O address or not. If it does, the
system enters the standby mode. If not, the
system enters the dreaming mode; that is the
system goes back full-on status but leaves the
monitor blank. For instance, if the system
connects to a LAN and receives an interrupt
from its file server, the system will enter the
dreaming mode to execute the corresponding
calling routine.
3. After you have finished with the Power Management Setup, press
the <ESC> key to return to the Main Menu.
BIOS Setup 29
PNP/PCI Configuration Setup
This option sets the mainboardÕs PCI Slots. Run this option as follows:
1. Choose ÒPNP/PCI CONFIGURATION SETUPÓ from the Main
Menu and the following screen appears. (The screen below shows
default settings.)
ROM PCI/ISA BIOS
PNP/PCI CONFIGURATION
AWARD SOFTWARE, INC.
Resources Controlled By : Manual
Reset Configuration Data : Disabled
IRQ-3 assigned to : Legacy ISA*
IRQ-4 assigned to : Legacy ISA*
IRQ-5 assigned to : PCI/ISA PnP*
IRQ-7 assigned to : PCI/ISA PnP*
IRQ-9 assigned to : PCI/ISA PnP*
IRQ-10 assigned to : PCI/ISA PnP*
IRQ-11 assigned to : PCI/ISA PnP*
IRQ-12 assigned to : PCI/ISA PnP*
IRQ-14 assigned to : PCI/ISA PnP*
IRQ-15 assigned to : PCI/ISA PnP*
DMA-0 assigned to : PCI/ISA PnP*
DMA-1 assigned to : PCI/ISA PnP*
DMA-3 assigned to : PCI/ISA PnP*
DMA-5 assigned to : PCI/ISA PnP*
DMA-6 assigned to : PCI/ISA PnP*
DMA-7 assigned to : PCI/ISA PnP*
*: These items will disappear when Resource Controlled. is Auto.
PCI IRQ Actived By : Level
PCI IDE IRQ Map To : PCI-AUTO
Primary IDE INT# : A
Secondary IDE INT# : B
ESC : Quit ↑ ↓ → ←: Select Item
F1 : Help PU/PD/+/– : Modify
F5 : Old Values (Shift)F2 : Color
F6 : Load BIOS Defaults
F7 : Load Setup Defaults
2. Use the arrow keys to move between items and select values.
Modify selected fields using the PgUp/PgDn/+/Ð keys.
A short description of screen items follows:
Resources
Controlled By
Manual Ð BIOS doesnÕt manage PCI/ISA PnP
card (i.e., IRQ) automatically.
Auto Ð BIOS auto manage PCI and ISA PnP
card (recommended).
Reset
Configuration
Disabled Ð Retain PnP configuration data in
BIOS.
Data
Enabled Ð Reset PnP configuration data in
BIOS.
30 BIOS Setup
IRQX and
DMAX assigned
to
PCI IRQ
Activated By
PCI IDE IRQ
Map To
Primary IDE
INT#
Secondary IDE
INT#
3. After you have finished with the PCI Slot Configuration, press the
<ESC> key and follow the screen instructions to save or disregard
your settings.
Choose PCI/ISA PnP or Legacy ISA. If the first
item is set to Manual, you could choose IRQX
and DMAX assigned to PCI/ISA PnP card or ISA
card.
Choose Edge or Level. Most PCI trigger signals
are Level. This setting must match the PCI card.
Select PCI-AUTO, ISA, or assign a PCI SLOT
number (depending on which slot the PCI IDE is
inserted). The default setting is PCI-AUTO. If
PCI-AUTO does not work, then assign an
individual PCI SLOT number.
Choose INTA#, INTB#, INTC#, or INTD#. The
default setting is INTA#.
Choose INTA#, INTB#, INTC#, or INTD#. The
default setting is INTB#.
BIOS Setup 31
Load Setup Defaults
This item loads the system values you have previously saved. Choose
this item and the following message appears:
ÒLoad SETUP Defaults (Y/N)? NÓ
To use the SETUP defaults, change the prompt to ÒYÓ and press
<Enter>. This item is recommended if you need to reset the system
setup.
Note: The SETUP Defaults are optimized for the most stabilized
performance.
Load BIOS Defaults
Choose this item and the following message appears:
ÒLoad BIOS Defaults (Y/N)?NÓ
To use the BIOS defaults, change the prompt to ÒYÓ and press <Enter>.
Note: BIOS DEFAULTS values are adjusted for high performance. If
you run into any problems after loading BIOS DEFAULTS,
please load the SETUP DEFAULTS for the stable performance.
32 BIOS Setup
Integrated Peripherals
The Integrated Peripherals option changes the values of the chipset
registers. These registers control system options in the computer.
Note: Change these settings only if you are familiar with the Chipset.
Run the Integrated Peripherals as follows.
1. Choose ÒIntegrated PeripheralsÓ from the Main Menu and the
following screen appears. (The screen below shows default
settings:)
OnChip IDE First Channel : Enabled
OnChip IDE Second Channel: Enabled
IDE Prefetch Mode : Enabled
IDE HDD Block Mode : Enabled
IDE Primary Master PIO : Auto
IDE Primary Slave PIO : Auto
IDE Secondary Master PIO : Auto
IDE Secondary Slave PIO : Auto
IDE Secondary Master UDMA: Auto
IDE Secondary Slave UDMA: Auto
Onboard FDC Controller : Enabled
Onboard UART 1 : 3F8/IRQ4
Onboard UART 2 : 2F8/IRQ3
Onboard UART 2 Mode : Standard
Onbaord Parallel Port : 378/IRQ7
Parallel Port Mode : ECP+EPP
ECP Mode Use DMA : 3
Parallel Port EPP Type : EPP1.9
ROM PCI/ISA BIOS
INTEGRATED PERIPHERALS
AWARD SOFTWARE, INC.
ESC : Quit ↑ ↓ → ←: Select Item
F1 : Help PU/PD/+/– : Modify
F5 : Old Values (Shift)F2 : Color
F6 : Load BIOS Defaults
F7 : Load Setup Defaults
2. Use the arrow keys to move between items and select values.
Modify selected fields using the PgUp/PgDn/+/Ð keys.
A short description of screen items follows:
On-chip IDE First
Channel/
On-chip IDE Second
Enabled Ð Use the on-board IDE
(default)
Disabled Ð Turn off the on-board IDE
Channel
IDE Prefetch Mode Use the default setting.
IDE HDD Block Mode Choose Enabled (default) or Disabled.
Enabled invokes multi-sector transfer
instead of one sector per transfer. Not all
HDDs support this function.
BIOS Setup 33
IDE Primary Master PIO/
IDE Primary Slave PIO/
IDE Secondary Master
PIO/
IDE Secondary Slave PIO
IDE Secondary Master
UDMA
IDE Secondary Slave
UDMA
Onboard FDC Controller Enabled Ð Use the on-board floppy
Onboard UART 1/
Onboard UART 2
Onboard UART 2 Mode Standard Ð (default) supports a serial
Choose Auto (default) or mode 0~4.
Mode 0 is the slowest speed, and HDD
mode 4 is the fastest speed. For better
performance and stability, we suggest
you use the Auto setting to set the HDD
control timing.
Choose Auto (defautl) or Disabled.
When Auto is selected, it supports Ultra
DMA Mode.
controller (default).
Disabled Ð Turn off the on-board
floppy controller.
Choose serial port 1 & 2Õs I/O address.
Do no set port 1 & 2 to the same value
except for Disabled.
COM 1/3F8H | COM3/3E8H
COM 2/2F8H | COM4/2E8H
(default)
infrared IrDA.
HPSIR Ð supports HP serial infrared
interface format
ASKIR Ð supports a Sharp serial
interface format.
IR Duplex Mode Use the default setting (Half). This
function shows up only when either
HPSIR or ASKIR is chosen in the
previous function (Onboard UART 2
Mode).
Onboard Parallel Port Choose the printer I/O address:
378H/IRQ7 (default), 3BCH/IRQ7,
278H/IRQ5
34 BIOS Setup
Parallel Port Mode Choose ECP + EPP (default), Normal
or EPP, ECP mode. The mode depends
on your external device that connects to
this port.
ECP Mode Use DMA Choose DMA3 (default) or DMA1.
This setting only works when the
Onboard Printer Mode is set at the ECP
mode.
Parallel Port EPP Type Choose EPP specification Ver. 1.7 or 1.9
(default).
Supervisor Password
Based on the setting you made in the ÒSecurity OptionÓ of the ÒBIOS
FEATURES SETUPÓ, this Main Menu item lets you configure the
system so that a password is required every time the system boots or an
attempt is made to enter the Setup program. Change the password as
follows:
1. Choose ÒSUPERVISOR PASSWORDÓ in the Main Menu and press
<Enter>. The following message appears:
ÒEnter Password:Ó
2. Enter a password and press <Enter>.
(If you do not wish to use the password function, you can just press
<Enter> and a ÒPassword disabledÓ message appears. )
3. After you enter your password, the following message appears
prompting you to confirm the new password:
ÒConfirm Password:Ó
4. Re-enter your password and then Press <ESC> to exit to the Main
Menu.
Important: If you forget or lose the password, the only way to access
the system is to set jumper JP5 to clear the CMOS RAM.
All setup information is lost and you must run the BIOS
setup program again.
BIOS Setup 35
User Password
Based on the setting you made in the ÒSecurity OptionÓ of the ÒBIOS
FEATURES SETUPÓ, this Main Menu item lets you configure the
system so that a password is required every time the system boots or an
attempt is made to enter the Setup program. Change the password as
follows:
1. Choose ÒUSER PASSWORDÓ in the Main Menu and press <Enter>.
The following message appears:
ÒEnter Password:Ó
2. Enter a password and press <Enter>.
(If you do not wish to use the password function, you can just press
<Enter> and a ÒPassword disabledÓ message appears. )
3. After you enter your password, the following message appears
prompting you to confirm the new password:
ÒConfirm Password:Ó
4. Re-enter your password and then Press <ESC> to exit to the Main
Menu.
5. You are not allowed to change any setting in ÒCMOS SETUP
UTILITYÓ except change userÕs password.
Important: If you forget or lose the password, the only way to access
the system is to set jumper JP5 to clear the CMOS RAM.
All setup information is lost and you must run the BIOS
setup program again.
36 BIOS Setup
IDE HDD Auto Detection
This Main Menu item automatically detects the hard disk type and
configures the STANDARD CMOS SETUP accordingly.
Note: This function is only valid for IDE hard disks.
HARD DISKS TYPE SIZE CYLS HEAD PRECOMP LANDZ SECTOR MODE
Primary Master : None 0 0 0 0 0 0 ----
Primary Slave : None 0 0 0 0 0 0 ---Secondary Master : None 0 0 0 0 0 0 ---Secondary Slave : None 0 0 0 0 0 0 ----
ROM PCI/ISA BIOS
CMOS SETUP UTILITY
AWARD SOFTWARE, INC.
Do you accept this drive C (Y/N)? N
ESC : Skip
Appendix A
The SY-5EAS mainboard has a new jumper (J100) for bett er
performance with Cyrix/IBM CP Us. Here is explaination
for you on how to use this jumper correctly.
l Leave J100 open when you want to install a non-Cyrix
/IBM C PU (default setting), or shor t J100 when you want t o
install a Cyrix CPU.
If you use a Cyrix/IBM CPU, do the following steps :
(1) Press [DELETE] to enter BIOS setup menu during boot-up.
(2) Select “ Chipset Features Setup ”
(3) Set “Linear Burst” to “Enabled” then choose “SAVE &
Figure 1 Location of J100
Appendix B :
Quick Installation Guide
This leaflet is meant to help you set the jumpers for your 5EAS motherboard in
order to boot the motherboard. Please refer to Diagram 1 for the location of the
relevant jumpers:
Diagram 1: Board layout
Table 1 : Jumper settings for CPU voltage and frequency
Voltage Settings: JP32 (JP30, JP31) CPU frequency settings: JP10, 11, 12 / JP13, 14
voltage 1-2 3-4 5-6 7-8 JP30 JP31 frequency: JP10 JP11 JP12 multiplier JP13 JP14
single 3.52V
single 3.3V
dual 3.2V
dual 2.9V
dual 2.8V
close close close close
close close
close close
close
close
open
open open
open open
open open open
open
open
close
close
close close
close
50 Mhz 2-3 2-3 2-3 1.5 / 3.5x open open
close
55 Mhz 2-3 2-3 1-2 2.0x
close
open 60 Mhz 1-2 2-3 2-3 2.5x
open 66 Mhz 2-3 1-2 2-3 3.0x open
open 75 Mhz 1-2 2-3 1-2
close
close close
open
close
Table 2: Additional jumper settings
CMOS clear: J5 PCI bus synchronous / asynchronous:
data (default)
Clear CMOS data
J100: Cyrix CPU linear burst enable Speaker: J18 Powerled: J17
Close this jumper when using a Cyrix CPU. Set the ‘linear burst’
item in the BIOS under ‘chipset features’ to enabled as well when
setting this jumper. (default setting is disabled)
J16
1-2
2-3
PCI bus: JP16Retain CMOS
synchronous 1-2
asynchronous 2-3
note: Set JP16 to 2-3 when 75 Mhz bus
clock is selected, for 50 and 55 set 1-2.
Sleep Switch connector: J23
connect a switch to this jumper, Any
IRQ will wake up the system.
Reset: J19 HDD Led: J24
Connect the reset
button to J19
connect the speaker
to J18
connect the HDD
led to J24
connect keylock
& power led to
J17
Quick Installation Guide (continued)
Table 3 : Settings for various processors
SETTINGS CPU Frequency JP10, 11, 12 / JP 13, 14
processor bus clock multiplier JP10 JP11 JP12 JP13 JP14
AMD K5 PR75 50 Mhz 1.5x 2-3 2-3 2-3 open open
AMD K5 PR90 60 Mhz 1.5x 1-2 2-3 2-3 open open
AMD K5 PR100 66 Mhz 1.5x 2-3 1-2 2-3 open open
AMD K5 PR120 60 Mhz 1.5x 1-2 2-3 2-3 open open
AMD K5 PR133 66 Mhz 1.5x 2-3 1-2 2-3 open open
AMD K5 PR150 66 Mhz 1.5x 2-3 1-2 2-3 open open
AMD K5 PR166 66 Mhz 2.5x 2-3 1-2 2-3
AMD K6 PR166 66 Mhz 2.5x 2-3 1-2 2-3
AMD K6 PR200 66 Mhz 3x 2-3 1-2 2-3 open
AMD K6 PR233 66 Mhz 3.5x 2-3 1-2 2-3 open open
Cyrix 6x86(L) P133+ 55 Mhz 2.0x 2-3 2-3 2-3
Cyrix 6x86(L) P150+ 60 Mhz 2.0x 1-2 2-3 2-3
Cyrix 6x86(L) P166+ 66 Mhz 2.0x 2-3 1-2 2-3
Cyrix 6x86(L) P200+ 75 Mhz 2.0x 1-2 2-3 1-2
Cyrix MX PR166 60 Mhz 2.5x 1-2 2-3 2-3
Cyrix MX PR200 66 Mhz 2.5x 2-3 1-2 2-3
Cyrix MX PR233 75 Mhz 2.5x 1-2 2-3 1-2
Cyrix MX PR266 75 Mhz 3x 1-2 2-3 1-2 open
P54C P75 50 Mhz 1.5x 2-3 2-3 2-3 open open
P54C P90 60 Mhz 1.5x 1-2 2-3 2-3 open open
P54C P100 66 Mhz 1.5x 2-3 1-2 2-3 open open
P54C P120 60 Mhz 2.0x 1-2 2-3 2-3
P54C P133 66 Mhz 2.0x 2-3 1-2 2-3
P54C/P55C P150 60 Mhz 2.5x 1-2 2-3 2-3
P54C/P55C P166 66 Mhz 2.5x 2-3 1-2 2-3
P54C/P55C P180 60 Mhz 3x 1-2 2-3 2-3 open
P54C/P55C P200 66 Mhz 3x 2-3 1-2 2-3 open
P55C P233 66 Mhz 3.5x 2-3 1-2 2-3 open open
close close
close close
close
open
close
open
close
open
close
open
close
close close
close close
close close
close
open
close
open
close
close close
close close
close
close
New CPUs Update
If you have higher frequency CPU than above list, just follow the rules below
to set your CPUs.
CPU
Frequency
266 MHz 66MHz 4.0x 2-3 1-2 2-3 short open short
300 MHz 66MHz 4.5x 2-3 1-2 2-3 short short short
Bus clock Multi-
plier
JP10 JP11 JP12 JP13 JP14 JP15
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