Tyan TITAN TURBO AT User Manual

Revision 1.0

TYAN S1570 AT

Pentium Class 75 thru 200MHz

430TX PCI-ISA System Board

User's Manual

Notice for the USA
Compliance Information Statement

( Declaration of Comformity Procedure) DoC

FCC Part 15: This Device complies with Part 15 of the FCC Rules.
Operation is subject to the following conditions:

1) this device may not cause harmful interference, and

2) this device must accept any interference received
including interference that may cause undesired operation.
If this equipment does cause harmful interference to radio or television
reception, which can be determined by turning the equipment off and on,
the user is encouraged to try one or more of the following measures:

w Reorient or relocate the receiving antenna.
w Increase the separation between the equipment and receiver.
w Connect the equipment into an outlet on a circuit different from that of the

receiver connected.
w Consult the dealer or an experienced radio/TV technician for help.

Notice for Canada
This apparatus complies with the Class "B" limits for radio interference as

specified in the Canadian Department of Communications Radio Interference
Regulations.

Cet appareil est conforme aux normes de CLASSE "B" d' interference radio
tel que spec' cifie' par le Ministe're Canadien des Communications dans les
re'glements d'interfe'rence radio.

Notice for Europe (CE Mark)

This product is in conformity to the Council Directive 89/336/EEC, 92/31/EEC
(EMC)

2S1570-001-01 http://www.tyan.com

Table Of Contents

1. Introduction.......................................................................4

1.1 Overview................................................................4

1.2 Hardware Specifications..........................................5

1.3 Software Specifications.......................................... 6

1.4 Environment........................................................... 6

2. Board Installation..............................................................7

2.1 Unpacking..............................................................7

2.2 Installation..............................................................7

3. S1570 On Board Resource Settings................................. 8

3.1 S1570 Board Layout & Jumper Locations................ 8

3.2 Quick Reference for Jumpers.................................. 9

3.3 CMOS RTC............................................................13

3.4 Speaker Connector..................................................13

3.5 Turbo Switch.......................................................... 13

3.6 Turbo LED Connector............................................. 13

3.7 Reset Connector..................................................... 14

3.8 Flash EPROM Jumpers.......................................... 14

3.9 CMOS & Password Reset...................................... 14

3.10 DRAM Installation................................................15

3.11 CPU Installation....................................................16

3.12 Cache Upgrade................................................... 17

3.13 Peripheral Device Installation.................................17

3.14 Connecting the Power Supply..................................18

4. BIOS Configuration...........................................................20

4.1 Entering Setup....................................................... 20

4.2 Control Keys......................................................... 21

4.3 Getting Help........................................................... 22

4.4 The Main Menu......................................................22

4.5 Standard CMOS Setup Menu...................................24

4.6 BIOS Features Setup.............................................. 27

4.7 Chipset Features Setup............................................30

4.7.1 Power Management Setup....................................31

4.8 PCI Slot Configuration.............................................33

4.9 Integrated Peripherals............................................. 35

4.10 Load Setup Defaults..............................................36

4.11 Password Setting ..................................................36

4.12 IDE HDD Auto Detection..................................... 38

4.13 Save & Exit Setup.................................................38

5. Flash Writer Utility............................................................39

5.1 The Flash Memory Writer Utility Screen...................41

6. System Resources.............................................................42

6.1 Timer & DMA Channel Map....................................42

3S1570-001-01 http://www.tyan.com

1. Introduction

1.1 Overview

The S1570 is a quality, high performance mainboard designed for Intel
Pentium microprocessors. This mainboard utilizes the Intel 430TX chipset
and can support CPU speeds of 75MHz through 200MHz. The S1570
will also support the CyrixM1/6x86 CPU's and the Intel multimedia
Pentium P55C/P54CTB (MMX Overdrive) which utilizes MMX com­mands.

The S1570's PCI Local Bus provides high performance capabilities that
are ideal for a wide range of demanding applications such as: CAD,
CAM, CAE, networking, multi-user environments, database management,
desktop publishing, image processing and 3D animation.

This integrated system board achieves high reliability with numerous
features and yet is small enough to be supported in a "AT" form-factor.
Some of the features included are: on-board dual channel PCI PIO,
DMA IDE and UltraDMA/33, on-board floppy controller, on-board high
speed I/O, and support for pipeline-burst SRAM.

Flexibility and expandibility have been designed into the S1570. With I/O
and drive controller support built on-board, the five PCI and four ISA
(One ISA and one PCI as a shared slot) slots are free for numerous add­on expansion cards.

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. If you have a tech support question please contact us at
www.tyan.com.

Notice

This board uses the Intel 430TX chipset. According to Intel , the USB
function in this chipset is not guaranteed. Compatibility tests cannot be
conducted for all USB peripherals at this time. Please log on to the Tyan
web page for the latest infomation.

4S1570-001-01 http://www.tyan.com

1.2 Hardware Specifications/Features

wCPU Intel Pentium 75 MHz thru 200 MHz (Socket 7)

Intel Pentium P55C/P54CTB (MMX Overdrive)
Cyrix/IBM/SGS M1/6x86 P120, P150 & P166,
AMD K5 PR90-PR166+/K6 166/200Mhz

wSpeed 50/60/66 MHz system bus

25/30/33 MHz PCI bus

wDRAM 3 banks of 72 pin SIMM and 2 DIMM sockets

Supports 5V or 3.3V memory
Supports EDO(Extended Data Out) DRAMs
Supports SDRAM(Synchronous DRAM)
Supports Fast Page Mode DRAMs
Supports 8MB to 256MB of DRAMs

wL2 Cache 512KB on board 2nd level PB SRAM.

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(Bus Master) mode 1 and 2.
( Bus Master driver on web at www.tyan.com)
Supports "Ultra 33" Synchronous DMA mode

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 Infra Red inter­face.
On-board floppy controller
On-board Universal Serial Ports

wI/O Bus Slots 5 Master/Slave 32-bit PCI-Bus slots

4 16-bit ISA Bus slots
One ISA and one PCI shared slot

wMouse On-board PS/2 mouse connector.

5S1570-001-01 http://www.tyan.com

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
EPROM chip.

wO.S. Operates with MS-DOS, Windows 3.x, Windows

for WorkGroups 3.x, Windows 95, Windows NT
OS/2, Novell Netware, Solaris and SCO Unix.

1.4 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

Information presented in this publication has been carefully checked for
reliability; however, no responsibility is assumed for inaccuracies. The
information contained in this document is subject to change without
notice.

Trademarks

Award BIOS/Flash are trademarks of Award Software International Inc.
AMI BIOS is a trademarks of American Megatrends Inc.
IBM,PC,AT,PS/2 are trademarks of IBM Corporation
INTEL,Pentium are trademarks of Intel Corporation.

6S1570-001-01 http://www.tyan.com

2. Board Installation

2.1 Unpacking

The mainboard package should contain the following:

wS1570 Mainboard
wOne IDE 40 pin cable
wOne 34 pin floppy cable
wUser's Manual

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 plugged in and turned off, touch an unpainted area of
the system chassis immediately before handling the mainboard or any com­ponent. 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. 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 S1570 matches the Baby-AT system board spec. It is assumed that the
chassis is for a standard Baby-AT mainboard form factor.

7S1570-001-01 http://www.tyan.com

3. On Board Resource Setting

Figure 3.1 S1570 Board Layout

KB CTR

pin 1

USB2

USB1

PS/2
Mouse

PWR CON. 5V

Keyboard
CON

BIOS

JP16

J28

pin 1

JP20

JP25

JP24

ISA Slot 4

pin 1

ISA Slot 3

82371AB

PIIX4

CON1

AMI/AWARD

JP33

JP38

1

Floppy Con.

Reserved

Reset

J8

PWR LED

SPKR

PCI Slot 5

ISA Slot 1

ISA Slot 2

JP13

JP45

3Volt

Battery

11

Primary IDE

Secondary IDE

HD LED

EXTSMI

IR

pin 1

SRAM

pin 1

SMC I/O

JP40

JP39

PCI Slot 4

PCI Slot 3

PCI Slot 2

82439TX

JP44
JP43

SRAM

CPU 0

JP10

Socket 7

Voltage Regulators

PCI Slot 1

JP11

JP9

Com1

1

Com2

1

1

Parallel Port

SDRAM Bank 1

SDRAM Bank 0

JP42

JP36

JP41

JP27

JP28

JP32

Bank 0

Bank 1

Bank 0

Bank 1

JP37

JP34

JP29
JP30
JP31

Bank 2

Bank 2

JP35

8S1570-001-01 http://www.tyan.com

3.2 Jumper Settings

CPU Speed Settings for Pentium P54C and P55C:

JP10 JP11 JP13 CPU Speed

off off 1-2,3-4 75MHz
off off 3-4 90MHz
off off 1-2 100MHz
on off 3-4 120MHz
on off 1-2 133MHz
on on 3-4 150MHz
on on 1-2 166MHz
off on 3-4 180MHz
off on 1-2 200MHz

CPU Speed Settings for Cyrix/SGS/IBM 6x86/M1:

JP10 JP11 JP13 CPU Speed/ID

on off 1-2,3-4 100MHz/P120+
on off 3-4 120MHz/P150+
on off 1-2 133MHz/P166+

DIMM Memory Voltage Select: 3V is Default

DIMM VCC 3V 5V

JP39 1-2 2-3
JP40 1-2 2-3

SIMM Memory Voltage Select: 5V is Default

SIMM VCC 3V 5V
JP34 & JP35 Off On
JP36 & JP37 On Off

9S1570-001-01 http://www.tyan.com

CPU Voltage Select: JP27-JP32 Default for P54C/P55C(MMX)

P54C/P55C Cyrix

JP27 Off 3.6V
JP28 On 3.5V
JP29 Off 3.3V
JP30 Off On
JP31 On Off
JP32 On Off

Heatsink Fan Power: J28

pin1 GND
pin2 +12V
pin3 GND

Keylock/Power LED: JP20

pin1 Power LED +
pin2 NC
pin3 Power LED ­pin4 Keylock
pin5 GND

I/O Port Setting: J39 and J40

J39 J40
For Serial Port 1-2 1-2
For IR Port 2-3 2-3

Turbo LED: JP25

pin1 anode +
pin2 cathode -

Turbo Switch: JP24 (De-Turbo mode not supported)

(Only turns on/off the turbo LED)

10S1570-001-01 http://www.tyan.com

EXT SMI: Jumper block J8 pins 3-4

Pinout Assignment
3 EXTSMI
4 Ground

Infra Red Interface: Jumper block J8 pins 6-11

Pinout Assignment
6 IR RX
7 Ground
8 IR TX
9 VCC
10 NC
11 VCC

HDD LED: Jumper block J8 pins 13-14 and pins 15-16

Pinout Assignments
13 Pri IDE +
14 Pri IDE ­15 Sec IDE +
16 Sec IDE -

Power LED2: Jumper block J8 pins 18-20

Pinout Assignments
18 Power LED +
19 NC
20 Power LED -

Reset: Jumper block J8 pins 22-23

Pinout Assignments
22 Ground
23 Reset

Speaker Connector: J8 pins 24-27

Pinout Assignments
24 Speaker out
25 Ground
26 NC
27 + 5V

11S1570-001-01 http://www.tyan.com

PS/2 Mouse Connector:

GND DATA VCC Keyboard

CLK

12S1570-001-01 http://www.tyan.com

3.3 CMOS RTC

The TX chipset includes a Real Time Clock circuit. It provides the date and
the time for the system. Normally the life span of a RTC battery is 5 years.
If the battery for the RTC is low, it will prevent your system from
POSTing and you will not get a display. If this occurs, you will need to
replace the battery with another 3volt lithium battery(Duracell DL2032).

3.4 Speaker Connector Installation

The S1570 provides a 4-Pin header to connect the speaker. The speaker is
connected to pins 24-27 of jumper block J8.

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 pins
22 and 23 on jumper block J8.

3.8 Flash EPROM-Jumper JP16

The S1570 uses flash memory to store BIOS programs. It can be updated
as new versions of the BIOS becomes available. The flash utility will guide
you through the process step by step.

JP16 determines which type of EPROM is used. This jumper has been set
to match the on board BIOS chip. The factory default for the S1570 is on
pins 1-2. Depending on the type of EPROM used, some boards will have
JP16 on pins 2-3.

13S1570-001-01 http://www.tyan.com

Refer to chapter 5 for Flash EPROM upgrade procedures.

3.9 Hardware CMOS & Password Reset: JP38

If you have been locked out of your system because you forgot your pass­word or set the CMOS incorrectly, follow the instructions below.

a. Power off the system

b. Jumper JP38 to pins2 and 3.

c. Wait for 2 seconds then return the jumper to pins 1 and 2.

d.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.

14S1570-001-01 http://www.tyan.com

3.10 DRAM Installation

The S1570 uses a 64-bit data path from memory to CPU and can
accommodate up to 256MB of RAM. The mainboard supports Fast Page
Mode, and EDO (Extended Data Out) 72 pin SIMMs.
SDRAM(Synchronous) are also supported in the DIMM slots. DIMM's
must be of the unbuffered variety. All installed memory will be automati­cally detected so there is no need to set jumpers. The TX chipset can
cache up to 64MB of RAM.

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 and 16MBx32 SIMMs.
wSIMM bank 0, 1 and 2 can use either double or single sided SIMMs.
wTwo SIMMs or One unbuffered DIMM must be installed for the system

to POST.

wSDRAM DIMMs can be installed one at a time.
wThe mainboard supports 1, 2 and 4Mx 64 DIMM modules.
wSIMM bank 0 and DIMM bank 0 cannot be used at the same time.

SIMM bank 1 and DIMM bank 1 cannot be used at the same time.
You can use SIMM bank 0 with DIMM bank 1.
You can use SIMM bank 1 with DIMM bank 0.

wIf you use 4Mx64 DIMMs you cannot use DRAM bank 2.
wWe do not recommend using DRAM bank 2 along with DIMMs.
wThe following table shows some of the available memory configurations.

DRAM

Bank 0

DRAM

Bank 1

DRAM

Bank 2

SDRAM

Bank 0

SDRAM

Bank 1

Total

4MB x2 none none none none 8MB

none none none 8MB x1 none 8MB

none none none 16MB x1 none 16MB
8MB x2 none none none none 16MB
4MB x2 4MB x2 4MB x2 none none 24MB

16MB x2 none none none none 32MB

none 8MB x2 none 16MB x1 none 32MB

32MB x2 none none none none 64MB

none none none none 64MB x1 64MB

none none none 32MB x1 64MB x1 96MB

none none none 64MB x1 64MB x1 128MB

64MB x2 none none none 64MB x1 192MB
64MB x2 64MB x2 64MB x2 none none 256MB

15S1570-001-01 http://www.tyan.com

3.11 CPU Installation

Several types of CPUs (75 thru 200MHz) can be used on S1570.
Please refer to section 3.2 for the correct CPU jumper settings for your
board.

w The CPU is a sensitive electronic component and it can be easily
damaged by static electricity. Do not touch the CPU pins with your
fingers.

w When installing the CPU into the socket, match the CPU pins to the
socket pins.

w Before the CPU is installed, the mainboard must be placed on a flat
plane. You should be able to insert the CPU with minimal pressure.
Do not push down hard, use firm pressure.

w A cooling fan and heat sink assembly is required to protect the
CPU from being damaged.

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
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.
The lever should snap into place at the side of the socket.

16S1570-001-01 http://www.tyan.com

3.12 Upgrading Cache Memory

The S1570 has 512kb of on-board pipelined burst SRAM and cannot be
field upgraded. The TX chipset can cache a maximium
of 64MB of RAM.

3.13 Peripheral Device Installation

After all the jumpers on the mainboard have been set, then it can be mounted
into the case. 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
five PCI-Bus slots can support either a Master or a Slave device.

After installing the peripheral controllers, the user should check everything
again, and prepare to power on the system.

17S1570-001-01 http://www.tyan.com

3.14 Connecting the Power Supply

The system power supply connectors on the mainboard is for a 5 volt
power supply. Incorrect installation of the power supply could result in
serious damage to the system board and connected peripherals.

Pin 1

Good Power Signal

VCC

+12V

-12V
GND

GND
GND

GND

-5V
VCC

VCC
VCC

5 volt

power

connector

pinout

To connect the leads from either voltage power supply, you should first
make sure the power supply is unplugged. Most power supplies have two
leads. Each lead has six wires, two of which are black.

Orient the connectors so the black wires are in the middle of the
5V power supply.

Caution: Some power supplies also include "3V" connectors. The
connection wires normally have two colors with 3 black wires on
one side. Please be very careful. Don't to use the wrong connec­tor.

18S1570-001-01 http://www.tyan.com

Align the plastic guide pins on the lead cables to their receptacles on the
mainboard. You may need to hold the lead at an angle to line it up.Once
you have the guide pins aligned, press the lead connector so that the
plastic clips on the lead snap into place and secure the lead to the connec­tor.

Connecting 5V power supply

19S1570-001-01 http://www.tyan.com

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 NVRAM. Entering incorrect information or for-

getting your password can lock you out of your system.(refer to 3.9
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.

20S1570-001-01 http://www.tyan.com

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

21S1570-001-01 http://www.tyan.com

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 4.1) 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 4.1: Main Menu

ROM ISA BIOS (2A59CT51)

CMOS SETUP UTILITY

AWARD SOFTWARE, INC.

STANDARD CMOS SETUP INTEGRATED PERIPHERALS

BIOS FEATURES 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

ESC : Save & Exit Setup
F10 : Quit

:Select Item

(Shift)F2 :Change Color

Time, Date, Hard Disk Type,.....

22S1570-001-01 http://www.tyan.com

w Standard CMOS setup

This setup page includes all the items in a standard compatible BIOS.

w BIOS features setup

This setup page includes all of the enhanced features of Award's BIOS.

w Chipset features setup

This setup page includes all the items of the 430TX chipset features.

w Power Management setup
Change, set, or disable system power management options.

w PNP/PCI Configuration

This setup page allows you to modify the configuration of PCI slot
parameters.

w Load setup defaults

BIOS defaults indicate the most appropriate values of each system param­ eter for your system.

w Supervisor/User Password

Change, set, or disable password. It allows you to limit access to the
system and Setup.

w Integrated Peripherals
This option lets you enable or disable on board FDD, HDD,

and I/O options.

w IDE HDD auto detection

Automatically configure hard disk parameters.

w Save and exit setup

Save changes to CMOS and exit setup.

w Exit without saving

Abandon all CMOS changes and exit setup.

23S1570-001-01 http://www.tyan.com

4.5. Standard CMOS Setup Menu

The items in Standard CMOS Setup Menu (Figure 4.2) are divided into 9
categories. Each category includes one or more setup items. Use the
arrows to highlight the item and use the <PgUp> or <PgDn> keys to
select the value you want for each item.

Figure 4.2: Standard CMOS Setup Menu

ROM ISA BIOS (2A59CT51)

STANDARD CMOS SETUP

AWARD SOFTWARE, INC.

Date (mm:dd:yy) : Tue, Dec 7 1995
Time (hh:mm:ss) : 18 : 01 : 38

Type Size CYLS. HEADS. PRECOMP. LANDZONE SECTORS
Primary Master : none 0mb 0 0 0 0 0
Primary Slave: none 0mb 0 0 0 0 0
Secondary Master: none 0mb 0 0 0 0 0
Secondary Slave: none 0mb 0 0 0 0 0
Drive A : 1.44 M, 3.5 in.
Drive B : 1.2 M, 5.25 in.

Video : EGA/VGA

Halt On : All errors

Base Memory: 640 K
Extended Memory: 7168 K
Expanded Memory: 0 K
Other Memory: 384 K

Total Memory: 8192 K

ESC: Quit : Select Item PU/PD/+/-: Modify
F1: Help (Shift)F2: Change Color F3: Toggle Calendar

w Date

The date format is <month>, <day>, <year>. Press <F3> to show the
calendar.

w Time

The time format is <hours>, <minutes>, <seconds>. The time is calcu­ lated based on the 24-hour military-time clock. For example 1 p.m. is
13:00:00.

Day The day, from Sun to Sat, Determined by the BIOS date,

month and year entries.
Date The date, from 1 to 31 (or maximum allowed in a month)
Month The month, Jan to Dec.
Year The year, from 1900 to 2099

24S1570-001-01 http://www.tyan.com

w Primary/Secondary Drive Type

This category identifies the types of hard disk drives that have been in­stalled in the computer. There are 46 predefined types and a user definable
type.

Press PgUp or PgDn to select a numbered hard disk type or type a number
and press <Enter>. Note that the specifications of your drive must match
with the drive table. The hard disk will not work properly if you enter
improper information for this category. If your hard disk type is not listed,
you can Type User to define your own drive manually.

If you select Type User, you will be asked to enter the following info. Enter
the paramters directly from the keyboard and press <Enter>. The hard disk
information should be provided in the documentation from the hard disk
vendor or the system manufacturer.

CYLS number of cylinders
HEADS number of heads
PRECOMP written precom
LANDZONE landing zone
SECTORS number of sectors

If a hard disk has not been installed or you have a CD-ROM/Tape drive
connected to an IDE channel, select NONE and press <Enter>.

w Drive A type/Drive B type

This category identifies the types of floppy disk drive A or B, that
have been installed in your computer.

None No floppy drive installed
360K, 5.25 in. 5-1/4 inch PC-type standard driv e ; 360 kilobyte capacity

1.2M ,5.25 in. 5-1/4 inch AT-type high-de nsity driv e; 1.2 me gabyte capacity
720K, 3.5 in. 3-1/2 inch double-side d drive ; 720 kilobyte capacity

1.44M, 3.5 in. 3-1/2 inch double-side d drive ; 1.44 me gabyte capacity

2.88M, 3.5 in. 3-1/2 inch double-side d drive ; 2.88 me gabyte capacity

25S1570-001-01 http://www.tyan.com

w Video

This category detects the type of graphics adapter used for the primary
display system. It must match your video display card and monitor. Al­though secondary monitors are supported, you do not have to select that
type in setup.

EGA/VGA Enhanced Graphics Adapter/Video Graphics Array.

For VGA,SVGA, or PGA monitor adapters.
CGA 40 Color Graphics Adapter, power up in 40 column mode.
CGA 80 Color Graphics Adapter, power up in 80 column mode.
Mono Monochrome adapter, includes hi-res monochrome.

w Halt On

The category determines whether the computer will stop if an error is
detected during power up.

No errors Whenever the BIOS has detected a non-fatal error, the

system will be stopped and you will be promted.
All errors The system boot will not be stopped for any errors that

are detected.
All, but Keyboard The system boot will not stop for a keyboard error;it

will stop for all other errors.
All, but Diskette The system boot will not stop for disk errors; it will

stop for all other errors.
All, but Disk/Key The system boot will not stop for a keyboard or disk

error; it will stop for all other errors.

w Memory

The category is for display-only and it is determined by POST (Power On
Self Test) of the BIOS.

Base Memory

The POST of the BIOS will determine the amount of

base (or conventional) memory installed in the system.

The value of the base memory is typically 640K.

Extended Memory

The BIOS determines how much extended memory is

present during the POST. This is the amount of

memory located above 1MB in the CPU's memory

address map.

26S1570-001-01 http://www.tyan.com

Expanded Memory

Expanded Memory (EMS) defines a 64K page frame in

the area between 640K and 1Mb containing four 16K pages

that are windows into the EMS memory. Programs issue

requests to the EMS manager to switch the page to any

part of EMS memory. Extended memory can be converted

to emulate EMS by using a memory manager such as

EMM386 that ships with Windows and DOS.

Other Memory

This refers to memory located in the 640K to 1024K ad-

dress space. This memory can be used for different

applications. DOS uses this area to load device drivers to

keep as much conventional memory free for application

programs as possible.

4.6. BIOS FEATURES SETUP

ROM ISA BIOS

BIOS FEATURES SETUP

AWARD SOFTWARE, INC.

Virus Warning :Enabled
CPU Internal Cache :Enabled
External Cache :Enabled
Boot Sequence :A,C
Swap Floppy Drive :Disabled
Boot Up Floppy Seek :Enabled
Boot Up NumLock Status :On
Typematic Rate Setting :Disabled
Typematic Rate (Chars/sec) :6
Typematic Delay (msec) :250
Security Option :Setup
PS/2 Mouse Function :Enabled
PCI/VGA Palette Snooping :Disabled
OS select for DRAM >64MB:non-OS/2

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

27S1570-001-01 http://www.tyan.com

w Virus warning

d

This category flashes on screen. During and after the system boot up,
any attempt to write to the boot sector or the partition table of the hard
disk drive will halt the system and the following error message will
appear. In the meantime, you can run an anti-virus program to locate the
problem. Default value is Enabled.

Enabled Activate automatically when the system boots up causing a warning

me ssage to appe ar when anything attemps to acce ss the boot sector or har
disk partition table.

Disabled No warning me ssage to appear when anything attemps to access the boot

sector or hard disk partition table .

w CPU Internal Cache/External Cache

These two categories speed up the memory access. However, it de­ pends on the CPU/Chipset design. Default value is Enabled.

Enabled Enables the cache
Disabled Disable s the cache

w Boot Sequence

This category determines which drive the computer searches first for the
disk operating system (i.e. DOS). Default value is A,C.

A,C Syste m will f irst search f or floppy disk drive then hard disk drive.
C,A Syste m will f irst search f or hard disk drive then floppy disk drive

w Swap Floppy Drive

Default value is Disabled

Enabled Floppy A & B will be swapped under DOS
Disable Floppy A & B will be normal definition.

28S1570-001-01 http://www.tyan.com

w Boot Up Floppy Seek

During POST, the BIOS will determine if the floppy disk drive installed is
40 or 80 tracks. 360K type is 40 tracks while 720K, 1.2M and 1.44M
are all 80 tracks. Default value is Enabled

Enabled BIOS searches for floppy disk drive to determine if it is 40 or 80

tracks. Note that the BIOS cannot tell from 720k, 1.2M or 1.44M
drive type as they are all 80 tracks

Disabled BIOS will not search for the type of floppy disk drive by track

number. Note that there will not be any warning messages if the
drive installed is 360K

w Boot Up NumLock Status

Default value is On

On Keypad is number keys
Off Ke ypad is arrow keys

w Gate A20 Option

Gate A20 controls the ability to access memory addresses above 1 MB
by enabling (Fast) or disabling (Normal) access to the processor.
Default value is Fast

w Typematic Rate Setting, Typematic Rate (char/sec), and
Typematic Delay.

Typematic Rate Setting enables or disables the following two options.
TheTypematic Rate (6, 8, 10, 12, 15, 20, 24, or 30 characters per second)
and Typematic Rate Delay (250, 500, 750, or 1000 milliseconds) control
the speed at which the keystroke is repeated. The selected character is
displayed when a key is held down after a delay set by the Typematic
Rate Delay. It then repeats at a rate set by the Typematic Rate.

29S1570-001-01 http://www.tyan.com

w Security Option

This category allows you to limit access to the system setup, or just
setup. Default value is Setup

S ystem The system will not boot and access to Setup will be denied if the correct

password is not e ntered at the prompt

Setup The syste m will boot, but access to setup will be denied if the password is

not entered at the prompt

w Video BIOS Shadow

It determines whether Video BIOS will be copied to RAM, however, it
is an optional chipset design. Default is Enabled.

4.7 Chipset Features Setup

This screen controls the settings for the board's chip set. The controls for
this screen are the same as the previous screen.

The Chipset Features Screen

ROM ISA BIOS

CHIPSET SETUP UTILITY

AWARD SOFTWARE, INC.

Auto Configuration :Enabled
DRAM Timing :70ns

DRAM Leadoff Timing :10/6/3
DRAM Readburst (EDO/FP) :x222/x333
DRAM Write Burst Timing :x333
Fast EDO Path Select :Disabled
Refresh RAS# Assertion :5/Clks
Fast RAS to CAS delay :2
DRAM Page Idle Timer :8Clks
DRAM Enhanced Paging :Enabled
Fast MA to RAS# delay :1 Clks
SDRAM(cas lat/ras to cas) :2/2
SDRAM Speculative Read :Disabled
System BIOS Cacheable :Enabled
Video BIOS Cacheable :Enabled
8 bit I/O Recovery Time :1
16 bit I/O Recover Time :1
Memory Hole at 15M/16M :Disabled

PCI Passive Release :Enabled
PCI Delayed Transaction :Enabled

Pipline Cache Timing :Faster
Mem Drive Strength(ma/ras) :2/2
DRAM Refresh :15.6us

More Information on these settings
can be found at Tyan's web site.
http://www.tyan.com

ESC :Quit :Select Item

F1 :Help PU/PD/+/- :Modify
F5 :Old Values (Shift)F2 :Color
F6 :Load BIOS Defaults
F7 :Load Setup Defaults

30S1570-001-01 http://www.tyan.com

4.7.1 Power Management Setup

ROM ISA BIOS

POWER MANAGEMENT SETUP

Power Management :Disabled Reload Global Timer Events
PM Control By APM :No IRQ (3-7, 9-15), NMI Disable
Video Off Method :Blank Screen Primary IDE 0 Disable
Video Off After :N/A Primary IDE 1 Disable
Doze Mode :Disabled Secondary IDE 0 Disable
Standby Mode :Disabled Secondary IDE 1 Disable
Suspend Mode :Disabled Floppy Disk Disable
HDD Power Down :Disabled Serial Port Disable
Throttle Duty Cycle :62.5% Parallel Port Disable
ZZ Active Monitor :Disable

IRQ8 Clock Event :Disable

AWARD SOFTWARE, INC

wPower Management

Options are disabled, user defined, Min saving, and Max saving.

wPM Control by APM

Options are "Yes" and "No". When set for "No", system BIOS will
ignore APM when power managing the system. If set on "Yes" the
system BIOS will wait for APM's prompt before it enters any PM
mode, e.g. Doze, Standby or Suspend.

wVideo Off Method

The "Blank Screen" option will let the system BIOS blanks the screen
when disabling video. V/H SYNC+Blank will let the BIOS turn off the
V-SYNC and H-SYNC signals from the VGA card to the monitor.

31S1570-001-01 http://www.tyan.com

w Doze Mode

Defines the continous idle time before the system enters Doze mode.

wStandby Mode

Defines the continous idle time before the system enters Standby mode.

wReload Global Timer Events

Defines the the activities that can cause the PM timers to reload. (Break­ing out of PM Mode)

32S1570-001-01 http://www.tyan.com

4.8 PCI Slot Configuration

PCI SLOT CONFIGURATION

AWARD SOFTWARE, INC.

ROM ISA BIOS

Resource Controlled by :Manual
Reset Configuration :Disabled

IRQ3 assigned to :legacy ISA
IRQ4 assigned to :legacy ISA
IRQ5 assigned to :PCI/PnP
IRQ7 assigned to :legacy ISA
IRQ9 assigned to :PCI/PnP
IRQ10 assigned to :PCI/PnP
IRQ11 assigned to :PCI/PnP
IRQ12 assigned to :PCI/PnP
IRQ14 assigned to :legacy ISA
IRQ15 assigned to :legacy ISA
DMA0 assigned to :PCI/PnP
DMA1 assigned to :PCI/PnP
DMA3 assigned to :PCI/PnP
DMA5 assigned to :PCI/PnP
DMA6 assigned to :PCI/PnP
DMA7 assigned to :PCI/PnP

w PCI Slot 1/Slot 2/Slot 3/Slot 4/Slot 5 INT#
w For Default Setting.
Connect to PCI System INT#
PCI Slot1 INTA INTA
PCI Slot1 INTB INTB
PCI Slot1 INTC INTC
PCI Slot1 INTD INTD
PCI Slot2 INTA INTB
PCI Slot2 INTB INTC
PCI Slot2 INTC INTD
PCI Slot2 INTD INTA
PCI Slot3 INTA INTC
PCI Slot3 INTB INTD
PCI Slot3 INTC INTA
PCI Slot3 INTD INTB
PCI Slot4 INTA INTD
PCI Slot4 INTB INTA
PCI Slot4 INTC INTB
PCI Slot4 INTD INTC
PCI Slot5 INTA INTA
PCI Slot5 INTB INTB
PCI Slot5 INTC INTC

PCI Slot5 INTD INTD

PCI IRQ Activated By: Level
PCI IDE IRQ Map To: 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

33S1570-001-01 http://www.tyan.com

wResources Controlled By

The Award Plug and Play BIOS can automatically configure all the boot
Plug and Play compatible devices. If you select Auto, all the
interrupt request and DMA assignment fields disappear, as the BIOS
automatically assigns them.

wIRQ n assigned to

When resources are controlled manually, assign each system interrupt
as one of the following types, depending on the type of device using
the interrupt.

Legacy ISA
Devices compliant with the original PC AT bus specification.

PCI/ISA PnP
Devices compliant with the Plug and Play standard, whether designed
for the PCI or ISA bus architecture.

wPCI IRQ Activated By:
Select the PCI IRQ Active scheme either LEVEL or EDGE.
Default value is LEVEL.

wPCI IDE IRQ Map To:
Select the IDE IRQ Map to ISA IRQ#.

wPrimary IDE INT#
Select the PCI INT# that the Primary IDE controller will use.
Default value is A.

wSecondary IDE INT#
Select the PCI INT# that the Secondary IDE controller will use.
Default value is B

34S1570-001-01 http://www.tyan.com

4.9 Integrated Peripherals

Integrated Peripherals
Award Software, Inc.

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 Primary Master UDMA :Auto
IDE Primary Slave UDMA :Auto
IDE Secondary Master UDMA :Auto
IDE Secondary Slave UDMA :Auto
On-Chip Primary PCI-IDE :Enable
On-Chip Secondary PCI-IDE :Enable
USB Keyboard Support :Disable
USB Latency Time (PCI CLK):32

On-Board FDC Controller :Enable
On-Board UART 1 :Com1/3F8
On-Board UART 2 :Com2/2F8
On-Board UART 2 :Standard
On-Board Parallel Port :378/IRQ7
Parallel Port Mode :Normal

The Settings in the Integrated Peripherals section lets the user enable or
disable on-board devices. You can also configure the I/O and IRQ
settings of the on-board serial and parallel ports.

35S1570-001-01 http://www.tyan.com

4.10. LOAD SETUP DEFAULTS

ROM ISA BIOS

CMOS SETUP UTILITY

AWARD SOFTWARE INC.

STANDARD CMOS SETUP PASSWORD SETTING

BIOS FEATURES SETUP IDE HDD AUTO DETECTION

CHIPSET FEATURES SETUP DAVE & EXIT SETUP

PCI SLOT configuration EXIT WITH OUT SAVING

LOAD SETUP DEFAULTS

ESC : Save & Exit Setup
F10 : Quit

Load SETUP Defaults except standard CMOS SETUP

Load Setup Defaults (Y/N)? N

:Select Item

(Shift)F2 :Change Color

w Load SETUP defaults

To load SETUP default values to CMOS NVRAM, enter "Y". If not,
enter "N"

w If any problem has occurred, loading the SETUP DEFAULTSis
recommended.

4.11. PASSWORD SETTING

When you select this function, the following message will appear at the
center of the screen to assist you in creating a password.

ENTER PASSWORD

36S1570-001-01 http://www.tyan.com

ROM ISA BIOS

CMOS SETUP UTILITY

AWARD SOFTWARE, INC.

STANDARD CMOS SETUP PASSWORD SETTING

BIOS FEATURES SETUP IDE HDD AUTO DETECTION

CHIPSET FEATURES SETUP DAVE & EXIT SETUP

PCI SLOT CONFIGURATION EXIT WITH OUT SAVING

LOAD SETUP DEFAULTS

ESC : Save & Exit Setup
F10 : Quit

Enter Password

:Select Item

(Shift)F2 :Change Color

Change/Set/Disable Password

Type the password, up to eight characters, and press <Enter>. The
password typed now will clear the previously entered password from
CMOS memory. You will be asked to confirm the password. Type the
password again and press <Enter>. You may also just press <Esc> to
abort the selection and not enter a password.

To disable the password, just press <Enter> when you are prompted to
enter a password. A message will confirm that the password has been
disabled, the system will boot and you can enter Setup freely.

PASSWORD DISABLED

If you select System at Security Option of BIOS Features Setup Menu, you
will be prompted for the password every time the system is rebooted or any
time you try to enter setup. If you select Setup at Security Option of BIOS
Features Setup Menu, you will be prompted only when you try to enter
setup.

37S1570-001-01 http://www.tyan.com

4.12. IDE HDD AUTO DETECTION

ROM ISA BIOS

CMOS SETUP UTILITY

AWARD SOFTWARE, INC.

CYLS. HEAD PRECOMP LANZONE SECTORS

Drive C: (202 Mb) 989 12 65535 989 35

Do you want to accept this as drive C (Y/N)?

Esc:Skip

Type "Y" to accept the H.D.D parameter reported by BIOS. Type "N" to keep the old
H.D.D parameter info.

4.13. SAVE & EXIT SETUP

ROM ISA BIOS

CMOS SETUP UTILITY

AWARD SOFTWARE, INC.

STANDARD CMOS SETUP PASSWORD SETTING

BIOS FEATURES SETUP IDE HDD AUTO DETECTION

CHIPSET FEATURES SETUP DAVE & EXIT SETUP

PCI SLOT CONFIGURATION EXIT WITH OUT SAVING

Save to CMOS and EXIT (Y/N)? N

LOAD SETUP DEFAULTS

ESC : Save & Exit Setup
F10 : Quit

(Shift)F2 :Change Color

:Select Item

Time, Date, Hard Disk Type,.....

Type "Y" and you will quit the Setup Utility and save the user setup values to RTC CMOS
NVRAM. Type "N" to return to Setup Utility.

38S1570-001-01 http://www.tyan.com

5.0 Flash Writer Utility

You can upgrade the BIOS of your mainboard by using a "Flash
Memory Writer"(FMW) utility. This utility can be downloaded from the
factory's BBS(Consult your system vendor for the phone #). The
system BIOS is stored on a 'flash' EPROM ROM chip on the
mainboard which can be erased and reprogrammed by the FMW.
The following three files make up the FMW.

AWDFLASH.EXE -The Flash Memory Writer utility for

Award to Award upgrade.

AMIFLASH.COM -The Flash Memory Writer utility for

AMI to AMI upgrade.

README -A text file of instructions
*S72AWXX.BIN -XX-A 2-digit version number.

The Flash memory writer records (or ‘programs’) a new BIOS
onto the flash memory chip. You cannot upgrade an Award
BIOS to a AMI BIOS or a AMI BIOS to an Award BIOS.

*This file name is subject to change and can have either a "bin" or a
"rom" extention.

Note

You should ALWAYS clear your CMOS after flashing a BIOS.
This will clear out any stray settings from your old BIOS which may
have been carried over from the flashing process. Most problems
encountered after flashing a BIOS will be solved by this simple
procedure.

39S1570-001-01 http://www.tyan.com

To reprogram the System BIOS, you must first do the following:

1. Check jumper JP16.(Default pins 1-2)

The S1570 uses a 5V Flash EPROM so jumper JP16
should be left in the default postion on pins 1 and 2. This
jumper should never be moved and on some board has been
hardwired.

2. Make sure the CPU is running in ‘real mode’.

FMW will not run if the CPU is operating in a protected or
virtual mode. This means that you can not run it with Windows
running or with any memory manager software. You must
disable any memory manager first. The easiest way to do this
is to:

a. Boot your system from a bootable floppy disk with no
CONFIG.SYS or AUTOEXEC.BAT files, and then run Flash
Memory Writer from a backup copy of your support disk. You
can make your back-up floppy bootable when you format it, and
use one disk for both purposes.

b. If you are using MS-DOS 6.x, you can use the feature that
allows you to bypass the CONFIG.SYS and AUTOEXEC.BAT

file. You do this while pressing <F5> while the “Starting MS-

DOS...” line is on the screen.

There are other ways to accomplish the same result. The main
point is to make sure no memory managers are running. If you
are not sure, try running FMW. If it runs, then you have suc­ceeded. If it displays a warning message about the CPU
mode, you will have to try again.

40S1570-001-01 http://www.tyan.com

Once you have satisfied the two requirements mentioned above,

you can run FMW. You can copy the contents of the “Flash”
directory to your hard drive, or you can run the utility from a
backupof the support floppy disk. Make sure the new BIOS file
is in thesame directory as the FMW utility.

To run FMW, change to the “Flash” directory if you are not al­ready in it. Type “Awdflash” at the DOS command line and press
the <Enter> key. The following screen will appear.

5.1 The Flash Memory Writer Utility Screen (Award)

FLASH MEMORY WRITER V3.0

Copyright (C) 1993, AWARD Software Inc.,

For VX/HX-2A59CT51 Date:4/13/95

File Name to Program:

Error Message:

Type in the whole file name, e.g. A61AW10.BIN and confirm
that you want to program the BIOS. The utility will then ‘Blank’,
‘Erase’, and then ‘Program’ the flash memory on the mainboard with the
new BIOS file. You should choose “yes” to save the original system
BIOS to a floppy diskette before you program the new BIOS. This
leaves you with a backup of your original BIOS in case you need to re­install it. This option is highly recommended. If you can not sucessfully
program the BIOS file for whatever reason, re-install you original BIOS
from the backup file. Always reset the CMOS with jumper JP1 after
flashing to a new BIOS.

Warning: If you do not successfully install a complete BIOS file
in the flash memory on the Mainboard, your system may not be able to
boot. If this happens, it will require service by your system vendor.
Follow the requirements and instructions in this section precisely to avoid
inconvenience.

41S1570-001-01 http://www.tyan.com

6.0 System Resource

6.1. TIMER & DMA CHANNEL MAP

TIMER MAP: TIMER Channel-0 system timer interrupt

TIMER Channel-1 DRAM REFRESH request
TIMER Channel-2 SPEAKER tone generator

DMA CHANNELS: DMA Channel-0 Available

DMA Channel-1 Available
DMA Channel-2 FLOPPY DISK adapter
DMA Channel-3 Available
DMA Channel-4 Cascade for DMA controller 1
DMA Channel-5 Available
DMA Channel-6 Available
DMA Channel-7 Available

6.2 INTERRUPT MAP

NMI: Parity check error

IRQ (H/W) 0 System TIMER interrupt from TIMER-0

1 KEYBOARD output buffer full
2 Cascade for IRQ 9-15
3 SERIAL port 2
4 SERIAL port 1
5 PARALLEL port 2
6 FLOPPY DISK adapter
7 PARALLEL port 1
8 RTC clock
9 Available
10 Available
11 Available
12 PS/2 Mouse
13 MATH co-processor
14 Primary IDE
15 Secondary IDE

42S1570-001-01 http://www.tyan.com

Addendum for S1564S/D

The 1564S/D Motherboard User’s Manual, Revision 1.0, does not
contain the CPU jumper settings for Cyrix 6x86MX processors. The
following chart should be used for setting the jumpers for that CPU
series.

Note that only processors with BUS speeds of 50, 60, and 66MHz are
supported by the 1564S/D boards. Thus, the following Cyrix 6x86MX/
IBM M2/SGS CPUs should not be used unless the BUS speed and
multiplier are adjusted.

CPU Model

Cyrix PR200+ 6x86MX
(IBM M2 PR200+)
(SGS PR200+)

Cyrix PR233+ 6x86MX*
(IBM M2 PR233+)
(SGS PR233+)

*due to CPU unavailability, the 50MHz x 4 setting has not been tested.

Default BUS speed
& multiplier (WILL

NOT WORK)

75MHz x 2 150MHz 50MHz x 3 150MHz

75MHz x 2.5 188MHz 50MHz x 4 200MHz

Default Physical

Speed

Adjusted BUS speed

& multiplier (WILL

WORK)

Adjusted Physical

Speed

The PR 200+ and PR 233+ processors come in both 66MHz and
75MHz versions. Check your CPU to see which type you have before
setting the jumpers.

CPU Jumper Settings

CPU Model

BUS speed

& multiplier

VD0 ON ON ON ON
VD1 OFF OFF OFF OFF
VD2 OFF OFF OFF OFF
VD3 ON ON ON ON

Cyrix PR 166+

6x86MX

60MHz x 2.5 66MHz x 2 66MHz x 2.5 66MHz x 3

Cyrix PR 166+

6x86MX

Cyrix PR 200+

6x86MX

Cyrix PR 233+

6x86MX

VIO ON ON ON ON

J13 3-4 1-2 1-2 1-2
J19 ON ON ON OFF
J20 ON OFF ON ON
J21 OFF OFF OFF OFF

S1564S/D-D1187-000 http://www.tyan.com