TYAN S1668 User manual

TYAN S1668
Dual Pentium Pro ATX
440FX PCI-ISA System Board
User'sManual
Revision 1.2

2S1668-ATX-001 http://www.tyan.com
TableOfContents
1.Introduction.......................................................................3
1.1 Overview................................................................3
1.2Hardware Specifications..........................................4
1.3SoftwareSpecifications.......................................... 5
1.4 Environment........................................................... 5
2.Board Installation.............................................................. 6
2.1 Unpacking.............................................................. 6
2.2 Installation.............................................................. 6
3.S1668OnBoardResourceSettings................................. 7
3.1S1668BoardLayout&JumperLocations................ 7
3.2 Quick ReferenceforJumpers.................................. 8
3.3 CMOS RTC............................................................11
3.4 Speaker Connector..................................................11
3.5 Turbo Switch.......................................................... 11
3.6Turbo LED Connect................................................11
3.7 Reset Connector..................................................... 12
3.8Flash EPROM Jumpers.......................................... 12
3.9 CMOS & Password Reset...................................... 12
3.10 DRAMInstallation................................................ 13
3.11 CPU Installation.................................................... 15
3.12VRM Installation...................................................16
3.13PeripheralDeviceInstallation.................................16
3.14ConnectingThePower Supply............................... 16
4. BIOS Configuration...........................................................17
4.1 Entering Setup....................................................... 17
4.2 Control Keys......................................................... 18
4.3 Getting Help........................................................... 19
4.4 The Main Menu...................................................... 19
4.5Standard CMOS Setup Menu...................................21
4.6 BIOS Features Setup.............................................. 24
4.7ChipsetFeaturesSetup............................................27
4.7.1PowerManagementSetup........................28
4.8PCI Slot Configuration.............................................30
4.9Integrated Peripherals............................................. 32
4.10 Load Setup Defaults..............................................33
4.11IDE HDD Auto Detection..................................... 35
4.12 Save & Exit Setup.................................................35
5.FlashWriterUtility............................................................36
5.1TheFlashMemoryWriter UtilityScreen...................38
6.System Resources............................................................. 39
6.1Timer&DMAChannelMap...................................39
6.2 Interrupt Map......................................................... 39

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1. Introduction
1.1 Overview
The S1668 is a quality, high performance dual processor mainboard based
on the powerful Intel Pentium Pro microprocessors. This mainboard is
designed around the latest and fastest Intel 440FX chipset and can support
CPU speeds of 150MHz through 200MHz.
The S1668 supports EDO memory, Burst EDO, ECC and memory parity
checking.The S1668's PCI Local Bus provides high performance capabili-
ties that are ideal for a wide range of demanding applications such as:
CAD, CAM, CAE, networking, multi-user environments, database man-
agement, desktop publishing, image processing and 3D animation.
This integrated system board achieves the highest reliability and features
the industry standard "ATX" form factor. Some of the features included
are: on-board dual channel PCI IDE, on-board floppy controller, on-board
high speed I/O, Universal Serial Bus and on-board PS/2 mouse connector.
Flexibility and expandibility have been designed into the S1668. With I/O
and drive controller support built on-board, the five PCI and three ISA
(One ISA and one PCI as a shared slot) slots are free for add-on expansion
cards. With eight SIMM sockets, the S1668 can provide a very
flexible memory configuration of 8MB to 1024MB of RAM. With the
S1668's support for dual Pentium Pro processors, you can start a system
with just one CPU, and later add another, when more processing power is
required.
Remember to take a look at Tyan Computers web site located at
http://www.tyan.com. Here you can find information on all of Tyan's
products along with FAQ's, distributors list, drivers and CMOS setting
explanations.

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1.2 Hardware Specifications/Features
wCPU Intel Pentium Pro 150 thru 200 MHz (Socket 8)
(Single or Dual CPU configuration)
wCoprocessor On-chip floating point unit
wSpeed 60/66 MHz system bus
30/33 MHz PCI bus
7.5/8.33 MHz ISA bus speed
wDRAM 4 double banks of 72 pin SIMM sockets
Supports 5V or 3.3V memory
Supports BEDO(Burst Extended Data Out)
Supports EDO(Extended Data Out) DRAMs
Supports ECC(Error Correcting Code)w/ parity
Supports Fast Page Mode DRAMs
Supports 8MB to 1024MB of DRAMs
wL2 Cache 256/512KB 2nd level cache in CPU
wEIDE Controller Primary and secondary PCI EIDE channels on
board for support of up to four EIDE Mode 0
through Mode 4 drives.Supports DMA mode 1
and 2.
wEnhanced I/O Multi-mode bi-directional parallel port that
supports standard, EPP and ECP modes.
Supports 16550 compatible UARTS for on-board
high speed serial ports.
Support for an IrDA compliant InfraRed inter-
face.
On-board floppy controller.
On-board USB(Universal Serial Port).
wMouse On-board PS/2 mouse connector.
wI/O Bus Slots 5 Master/Slave PCI-Bus
3 ISA Bus (One ISA and one PCI shared slot)

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1.3 Software Specifications
wBIOS Award or AMI BIOS
AT CMOS setup, BIOS/CHIPSET setup,
and hard disk utility included.
Support for easy BIOS upgrades with flash
EEPROM chip.
wO.S. Operates with MS-DOS, Windows 3.x, Windows
for Work Groups 3.x, Windows 95, Windows NT,
OS/2, Novell Netware, Novell UnixWare 1.1 and
SCO Unix.
1.3 Environment
Ambient Temperature 0 to +50 C (operating)
Relative Humidity 0 to +85% (operating)
Altitude 0 to 10,000 feet (operating)
Vibration 0 to 1,000 Hz
Voltage 4.9 to 5.2 V
Informationpresentedinthispublicationhasbeencarefullycheckedfor
reliability;however,noresponsibilityisassumedforinaccuracies.The
informationcontainedinthisdocumentissubjecttochangewithout
notice.
Trademarks
AwardBIOS/Flash are trademarks of AwardSoftwareInternationalInc.
AMIBIOSisa trademarksofAmerican MegatrendsInc.
IBM,PC,AT,PS/2aretrademarksofIBMCorporation
INTEL,PentiumProaretrademarksofIntelCorporation.
Copyrightc1996TYANComputerCorp.
S1668,TitanProATX.

6S1668-ATX-001 http://www.tyan.com
2. Board Installation
2.1 Unpacking
The mainboard package should contain the following:
wS1668 Mainboard
wOne IDE 40 pin cable
wOne 34 pin floppy cable
wUser's Manual
wOptional VRM(Voltage Regulator Module)
The mainboard contains sensitive electric components which can be easily
damaged by static electricity, so the mainboard should be left in its original
packaging until it is ready to be installed.
With the power supply pluged in and turned off touch an unpainted area of
the system chassis imedietly before handling the mainboard or any compo-
nent. Doing so discharges the static charge your body may have built.
After opening the mainboard carton, extract the system board holding it by
its edges ,and place it only on a grounded anti-static surface, component
side up. Inspect the board for damage. Press down on all of the socket IC's
to make sure that they are properly seated. Do this only with the board
placed on an anti-static mat. Do not touch the bottom of the board.
DO NOT APPLY POWER TO THE BOARD IF IT HAS BEEN
DAMAGED!
2.2 Installation
You are now ready to install your mainboard. The mounting hole pattern of
the S1668 matches the ATX system board spec. It is assumed that the
chassis is for a standard ATX mainboard form factor.

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VRM 0
PWR CON. 5V
Com1 Com2
Bank 0 Bank 0 Bank 1 Bank 1 Bank 2 Bank 2 Bank 3 Bank 3
Socket 8 Socket 8
CPU 0
CPU 1
RTC
Parallel Port
PCI Slot 1
PCI Slot 2
PCI Slot 3
PCI Slot 4
PCI Slot 5
ISA Slot 1
ISA Slot 2
ISA Slot 3
Primary IDE
Secondary IDE
Floppy Con.
BIOS
AMI/AWARD
KB CTR
1
1
1
pin 1
CON5
CON4
pin 1
pin 1
J27
1
J26
1
pin 1
pin 1
J18
USB1
J28 J29
J30
J45 J46 J47
J44
J43J42
J41
J32
J21 J22 J23 J24
pin 1
J17J16
J15
J14
J11
J12
J2 J3 J5J4
82371SB
VRM 1
3. On Board Resource Setting
Figure 3.1 S1668 ATX Board Layout
J49J48
J31
Factory Default(do not change) Rev02 PCB
J31 off
J48 off
J49 off
82441FX
82442FX
PS/2
Mouse
PS/2
KB
J20
J10
pin 1
pin 1
USB2
pin 1 J25
J1
pin 1
J50

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3.2 Jumper Settings:
CPU Speed: J27, J21, J22, J23, and J24
CPU Speed J27 J21 J22 J23 J24 J11 J12
150MHz 3-4 off on on on on off
166MHz 1-2 off on on on off on
180MHz 3-4 on off on on on off
200MHz 1-2 on off on on off on
Host Bus Speed/PCI Bus Speed: J27
Host Speed PCI Speed J27 J11 J12
60MHz 30MHz 3-4 on off
66.67MHz 33.33MHz 1-2 off on
CPU Clock Multiplier: J21, J22, J23 and J24
Multiplier J21 J22 J23 J24
X2 off off off off
X2.5 off on on on
X3 on off on on
X3.5 off off on on
X4 on on off on
CMOS Resest/Password Reset: J41(Default off)
If you forget your CMOS password or need to reset the
CMOS registers, just power off the system and close
jumper J41for five seconds. Then open jumper J41 and
power on the system. This will set the CMOS and password
back to the system default.
DRAM Voltage: J2, J3, J14, J15, J4, J5, J16 and J17(Default 5V)
(Some EDO memory is 3.3V)
Voltage J2 J3 J14 J15 J4 J5 J16 J17
3.3V on on on on off off off off
5V off off off off on on on on
Warning, damage to system can result if set incorrectly!

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I/O Selection: J28 & J29
J28 J29
For COM 1 and 2 1-2 1-2 Default
For InfraRed 2-3 2-3
Speaker Connector: J43 Pinout Assignments
1Speaker out
2Ground
3Ground
4+ 5V
Keylock Connector: J44 Pinout Assignments
Pins 1 to 3 for power LED. 1Led Output
2No Connect
3Ground
Pins 4 and 5 for Keylock 4Keylock
5Ground
Turbo Switch: J47 ( Non-Turbo Mode Not Supported )
HDD LED: J46
Pinout Assignments
1Cathode
2Anode
3Cathode
4Anode
Pins 1 and 2 are for primary IDE channel.
Pins 3 and 4 are for secondary IDE channel.

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Reset Connector: J45 Pinout Assignment
1Power Good
2Ground
Turbo LED Connector: J42 Pinout Assignment
1Cathode
2Anode
FlashEEPROM:J32(Default 5V)
This jumper should be left at the factory default.
Voltage J32
5V 1-2 (default)
12V 2-3
InfraRed Interface: Con4 and Con5
Pinout Assignment
1Signal In
2Gnd
3SignalOut
4VCC
Super I/O Type: J26
Type J26
665IR 1-2
669IR 2-3
This setting depends on what type of SMC I/O chip
is installed on the board. This jumper is set at the
factory and should not be changed.

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Soft Power On Switch: J1 Pinout Assignment
1Soft Power On
2Ground
CPU FAN Power: J49 and J50
Pinout Assignment
112Volts
2Ground
3.3 CMOS RTC
CMOS RTC includes an internal battery and Real Time Clock circuit. It
provides the date and the time for the system. Normally the life span of a
RTC internal battery is 10 years. When replacing, you should use the same
model.
3.4 Speaker Connector Installation
S1668 provides a 4-Pin header (J43) to connect the speaker. The polarity
can go either way.
3.5 Turbo Switch
The front panel on your case may have a turbo switch to control system
speed when slower program execution is required for software developed
in the old XT days. The Intel 44FX chipset doesn't support a de-turbo
mode, but the S1668 has a connector (J47) for the cable that may come has
a connector (J47) for the cable that may come with the case.with the case.
3.6 Turbo LED Connector Installation
The TURBO LED on the front case panel can indicate the current speed
status of the system. The TURBO LED connector should be installed to
J42 in the correct direction.

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3.7 Hardware Reset Switch Connector Installation
The RESET switch on your cases' display panel provides users with the
HARDWARE RESET function which is the same as power on/off. The
system will do a cold start after the RESET switch is pushed by the user.
The RESET switch is a 2 pin connector and should be installed on jumper
J45.
3.8 Flash EEPROM-Jumper J32
The S1668 uses flash memory to store BIOS data. It can be updated as
new versions of the BIOS becomes available. The flash utility will guide
you through the process step by step. If your system is functioning properly,
you may want to forego updating your BIOS in the event the new one
causes problems with your existing hardware and software.
J32 determines which type of EPROM is used. This jumper has been set to
match the on board BIOS chip. The factory default for the S1668 is on pins
1-2.
Refer to chapter 6 for Flash EEPROM upgrade procedures.
3.9 Hardware CMOS & Password Reset
(The following steps are valid provided the board has a DS12887A RTC)
If you have been locked out of your system because you forgot your pass-
word or set the CMOS incorrectly, follow the instructions below.
a. Power off the system
b. Short jumper J41.
c. Wait for 5 seconds then remove the jumper from J41.
d.Then power on the system again.
By doing the above procedures, your password will be erased and the CMOS
will be reset to the BIOS defaults.

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3.10 DRAM Installation
The S1668 uses a 64-bit data path from memory to CPU and can
accommodate up to 1024 MB of RAM. The mainboard supports
standard, EDO (Extended Data Out) and ECC(Error Correcting Code)
72 pin SIMMS . All installed memory will be automatically detected so
there is no need to set jumpers.
wSIMM modules must be installed in pairs.
wEach pair of SIMMs must be of the same size and type.
wThe mainboard supports 1, 2, 4, 8, 16x32 or 32MBx32 SIMMS.
wThe table on the following page shows some of the available memory
configurations.
Voltage ID for Older Pentium Pro CPU's: J10 and J20
Most Pentium Pro CPU's will program the VRM to output
the correct voltage it requires, so these jumper are not important
and should be left open. Some early versions of the Pentium Pro
cannot program the VRM so you have to set these jumper manually.
J10 and J20 each have eight pins and are numbered as follows.
5 6 7 8
1 2 3 4
Pin # 4--8 3-7 2-6 1-5
3.5V on on on on
3.4V on on on off
3.3V on on off on
3.2V on on off off
3.1V on off on on
3.0V on off on off
2.9V on off off on
2.8V on off off off
2.7V off on on on
2.6V off on on off
2.5V off on off on
2.4V off on off off
2.3V off off on on
2.2V off off on off
2.1V off off off on
Default off off off off

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Memory Table
Bank 0 Bank 1 Bank 2 Bank 3 Total
4MB x2 none none none 8MB
8MB x2 none none none 16MB
4MB x2 4MB x2 none none 16MB
8MB x2 8MB x2 none none 32MB
4MB x2 4MB x2 4MB x2 4MB x2 32MB
16MB x2 none none none 32MB
16MB x2 16MB x2 none none 64MB
32MB x2 none none none 64MB
64MB x2 none none none 128MB
16MB x2 16MB x2 16MB x2 16MB x2 128MB
32MB x2 32MB x2 none none 128MB
32MB x2 32MB x2 32MB x2 none 192MB
32MB x2 32MB x2 32MB x2 32MB x2 256MB
64MB x2 64MB x2 none none 256MB
128MB x2 none none none 256MB
64MB x2 64MB x2 64MB x2 none 384MB
64MB x2 64MB x2 64MB x2 64MB x2 512MB
128MB x2 128MB x2 none none 512MB
128MB x2 64MB x2 64MB x2 64MB x2 640MB
128MB x2 128MB x2 128MB x2 none 768MB
128MB x2 128MB x2 64MB x2 64MB x2 768MB
128MB x2 128MB x2 128MB x2 32MB x2 832MB
128MB x2 128MB x2 128MB x2 64MB x2 896MB
128MB x2 128MB x2 128MB x2 128MB x2 1024MB

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1. Make sure the ZIF socket lever is up. To raise the lever, pull it out
to the side a little and raise it as far as it will go. The top plate will
slide back.
2. Align the CPU and socket Pin 1 corners. The pins on the bottom
of the CPU should align with the rows of holes in the socket.
3. Insert the CPU in the socket. It should insert easily. If it does
not, adjust the position of the lever a little.
4. Press the lever down. The top plate will slide forward. You will
feel some resistance as the pressure starts to secure the CPU in
the socket. This is normal and will not damage the CPU.
When the CPU is installed, the lever should snap into place at the
side of the socket in the down position.
3.11 CPU Installation
Many types of Pentium Pro (150 thru 200 MHz) CPUs can be used on
the S1668. Please refer to the previous pages for the correct CPU jumper
settings for your board.
wThe CPU is a sensitive electronic component and it can be easily
damaged by static electricity. Do not touch the CPU pins with your
fingers.
wWhen installing the CPU into the socket, match the CPU pins to the
socket pins.
wBefore the CPU is installed, the mainboard must be placed on a flat
plane in order to avoid being broken by the pressure of CPU insertion.
wA cooling fan and heat sink assembly is required to protect the
CPU from being damaged.

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3.12VRM Installation
The VRM is required for the Pentium Pro to work. The CPU will
program the VRM for the correct voltage needed. No jumper settings
are needed, just install the VRM into the VRM socket nearest the
CPU that is being installed. The VRM can only fit in the socket one
way so there is no danger of installing it incorrectly. Not all VRM's
will work in the S1668. Make sure you purchased a qualified VRM.
wVRM socket 0 is for CPU socket 0.
wVRM socket 1 is for CPU socket 1.
again, and prepare to power-on the system.
3.14ConnectingthePowerSupply & On/OffSwitch
The system power supply connectors on the mainboard is for a
standard ATX power supply. It can only be plugged in one way and
should install in easily.
ATX cases have an on/off switch that can be used to turn on or off
the ATX powersupply without having to use the switch that is on
the back of the powersupply.Use jumper J1 is for the on/off button from the
system case.
3.13 Peripheral Device Installation
After all the jumpers on the mainboard have been set, then it can be mounted
into the case. Then proceed to install the display card and any other
peripheral devices.
If a PCI-Bus interface card is to be installed in the system, any one of the
four PCI-Bus slots can support either a Master or a Slave device.
After installing the peripheral controller, the user should check everything

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4. BIOS Configuration
Award's BIOS has a built in setup program that allows the user to modify
the basic system configuration. This type of information is stored in the
battery-backed CMOS SRAM. Entering incorrect information or for-
getting your password can lock you out of your system.(refer to 3.15
for resetting of CMOS)
4.1. Entering Setup
Power ON the computer and press <Del> immediately and you will enter
Setup. The other way to enter setup is to power on the computer, when the
below message appears briefly at the bottom of the screen during the post
(Power On Self Test), press <Del> key or simultaneously press <Ctrl>,
<Alt>, and <Esc> keys.
* TO ENTER SETUP BEFORE BOOT PRESS CTRL-ALT-
ESC OR DEL KEY
If the message disappears before you respond and you wish to enter Setup,
restart the system by turning it OFF then ON or by pressing "Reset" on the
system case. You may also restart by simultaneously pressing <Ctrl>, <Alt>,
and <Del> keys. If you do not press the keys at the correct time, the
system will not boot and an error message will appear on the screen.You
will be asked to,
* PRESS F1 TO CONTINUE, CTRL-ALT-ESC OR DEL TO
ENTER SETUP.
Figure 4.1 will appear on the sceen. The Main Menu allows you to select
from the 8 setup functions and 2 exit choices. Use the arrow keys to select
among the items and press <Enter> to accept or enter each sub-menu.

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4.2. Control Keys
PgUp key Increases the numeric value or make changes
PgDn key Decreases the numeric value or make changes
F1 key General help, only for Status Page Setup menu
and Option Page Setup Menu
F2 key Change color from a total of 16 colors
F3 key Calendar, only for Status Page Setup Menu
F4 key Reserved
F5 key Restore the previous CMOS value, only for Option
Page Setup Menu
F6 key Load defaults
F8 key Reserved
F9 key Reserved
F10 key Save all CMOS changes, only for Main Menu

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4.3. Getting Help
4.3.1. Main Menu
The on-line description of the highlighted setup function is displayed at the
bottom of the screen.
4.3.2. Setup Page menu/Option Page Setup Menu
Press F1 to pop up a small help window that describes the appropriate keys
to use and the possible selections for the highlighted items. To exit the Help
Window, press <Esc>.
4.4.The Main Menu
Once you enter the Award BIOS CMOS Setup Utility, the Main Menu
(Figure 4.4) will appear on the screen. The Main Menu allows you to
select from the eight setup functions and 2 exit choices. Use the arrow
keys to select among the items and press <Enter> to accept or enter the
sub-menu.
Figure 4.4: Main Menu
ROM ISA BIOS (2A59CT51)
CMOS SETUP UTILITY
AWARD SOFTWARE, INC.
ESC : Save & Exit Setup
F10 : Quit (Shift)F2 :Change Color
:Select Item
Time, Date, Hard Disk Type,.....
STANDARD CMOS SETUP INTEGRATED PERIPHERAL
BIOS FEATURED SETUP SUPERVISOR PASSWORD
CHIPSET FEATURES SETUP USER PASSWORD
POWER MANAGEMENT IDE HDD AUTO DETECT
PNP/PCI CONFIGURATION SAVE AND EXIT
LOAD BIOS DEFAULTS EXIT WITHOUT SAVING

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ww Standard CMOS setup
This setup page includes all the items in a standard compatible BIOS.
ww BIOS features setup
This setup page includes all of the enhanced features of Award's BIOS.
ww Chipset features setup
This setup page includes all the items of the 430HX chipset features.
wPower Management setup
Change, set, or disable system power management options
ww PNP/PCI Configuration
This setup page allows you to modify the configuration of PCI slot
parameters.
ww Load setup defaults
BIOS defaults indicate the most appropriate values of each system param-
eter for your system.
ww Supervisor/User Password
Change, set, or disable password. It allows you to limit access to the
system and Setup.
ww Integrated Peripherals
This option lets the you enable or disable on board FDD, HDD,
and I/O options.
ww IDE HDD auto detection
Automatically configure hard disk parameters.
ww Save and exit setup
Save changes to CMOS and exit setup
ww Exit without saving
Abandon all CMOS changes and exit setup.