TYAN TOMAHAWK BX, Tomahawk A+, S1856S, S1856S-V, S1856 User Manual
Tyan S1856
Tomahawk BX/A+
Motherboard User’s Manual
Revision 1.00
Copyright © Tyan Computer Corporation, 1999. All rights reserved. No part of this
manual may be reproduced or translated without prior written consent from Tyan
Computer Corp.
All registered and unregistered trademarks and company names contained in this
manual are propery of their respective companies including, but not limited to the
following.
AMIBIOS is a trademark of American Megatrend Incorporated.
Award is a trademark of Phoenix T echnologies Ltd.
Windows is a trademark of Microsoft Corporation.
IBM, PC, AT, PS/2 are trademarks of IBM Corporation.
INTEL, Pentium II, Celeron are trademarks of Intel Corporation.
S1856 Tomahawk BX and Tomahawk A+ are trademarks of TYAN Computer
Corporation.
Information contained in this publication has been carefully checked for accuracy and
reliability. In no event will Tyan Computer be held liable for any direct or indirect,
incidental or consequential damage, loss of use, loss of data, or other malady resulting
from errors or inaccuracies of information contained in this manual. The information
contained in this document is subject to change without notice.
PRINTED IN USA.
T able of Contents
1. Introduction................................................................................................. 4
Overview ........................................................................................... 4
Icons................................................................................................. 5
Hardware Specifications/Features................................................ 5
Software Specifications.................................................................. 7
T echnical Support........................................................................... 7
Returning Merchandise for Service............................................. 8
2. Board Installation..................................................................................... 10
Unpacking....................................................................................... 1 0
Installation...................................................................................... 1 0
Quick Reference for Jumpers........................................................ 1 2
Map of Motherboard Jumpers..................................................... 1 3
Clear CMOS & Reset Password .................................................. 1 7
Soft Power Connector .................................................................... 1 7
Hardware Reset Switch Connector Installation......................... 1 8
Ensoniq Audio Connectors ......................................................... 1 8
External SMI.................................................................................... 1 8
Chassis Intrusion Alarm Connector............................................ 18
CMOS R TC...................................................................................... 18
Flash EEPROM............................................................................... 1 8
Mounting the Motherboard in the Chassis .............................. 19
Installing Memory .......................................................................... 1 9
Cache Memory ................................................................................ 2 3
Installing the CPU and Cooling Fan........................................... 2 3
Connecting IDE and Floppy Drives.............................................2 4
Connecting the Power Supply ...................................................... 2 7
Installing Add on Cards ............................................................... 2 8
Connecting PS/2, USB, Serial and Parallel Devices.............. 2 8
Frequently Asked Questions....................................................... 3 0
3. BIOS Configuration................................................................................. 32
Main Setup Menu.......................................................................... 3 5
BIOS Features Setup...................................................................... 4 0
Chipset Features Setup................................................................. 4 5
Power Management Setup............................................................ 4 8
PnP / PCI Configuration................................................................ 5 3
Integrate Peripherals...................................................................... 5 6
User Password................................................................................ 5 8
Flash Writer Utility ......................................................................... 5 9
4. System Resources.................................................................................... 62
Beep Codes..................................................................................... 6 2
Troubleshooting System Problems............................................. 6 3
Displayed Error Messages.......................................................... 7 1
Appendix 1 - CPU Retention Module Options.......................................... 74
Appendix 2 - Glossary .................................................................................. 76
http://www.tyan.com
4
Chapter 1
Introduction
Overview
The S1856 (S1856S T omahawk BX, and S1856S-V T omahawk A+) is a quality ,
high performance motherboard designed for Socket 370 Intel Celeron microprocessors. The T omahawk BX utilizes the Intel 440BX AGPset with AMI BIOS.
The Tomahawk A+ uses the VIA Apollo Pro Plus AGPset with A ward BIOS.
Both boards can support Celeron CPU speeds of 300MHz through 400MHz,
and host bus speeds of 66MHz to 100MHz.
The S1846 motherboard, with built-in AGP slot, provides high performance
capabilities that are ideal for a wide range of demanding applications such as
CAD, CAM, CAE, desktop publishing, 3D animation, and video production.
This system board in an ATX form factor offers far more features and
expandability than Micro ATX models. Some of the features included are
onboard dual channel PCI PIO, Bus Master IDE and UltraDMA/33, onboard
floppy controller, and onboard high speed I/O.
Flexibility and expandability have been designed into the T omahawk BX/A+.
W ith I/O and drive controller support built onboard, the one AGP slot, five PCI
and two ISA slots (one shared, seven usable) are free for numerous add-on
expansion cards.
chapter 1
Introduction
S1856 Tomahawk BX/A+
5
INTRO
Remember to take a look at TYAN Computer’s web site located at
http://www.tyan.com. There you can find information on all of TYAN’s
products along with FAQs, distributors list, drivers, and BIOS setting explanations.
Icons
In order to help you navigate this manual and set up your system, we have
added several icons to our format.
This icon alerts you to particularly important details regarding the
setup or maintenance of your system. This icon often appears next
to information that may keep you from damaging your board or
system. While we will often point out the most vital paragraphs in a chapter,
you should always read every word in the text. Failing to do so can lead to
exasperation and expense.
Wherever possible, we have included step-by-step instructions for
setting up your system, which are indicated by this icon. However, it
is in your best interest to read an entire section (and perhaps the
entire manual) before you begin to fiddle with your motherboard.
While we have alerted you to potential dangers in several places in
the manual with this icon, these warnings should not be regarded as
the whole of your safety regimen. Never forget that computers are
electrical devices, and are capable of delivering a shock. Prevent damage to
yourself and to your board: always ensure that your system is turned off and
unplugged whenever you are working with it, and that you are equipped with a
static safety device.
Hardware Specifications/Features
Processor Information •One Socket 370 CPU connector
•66MHz to 100MHz bus support
(BIOS selectable)
•Celeron 300 to 500MHz
!!
!!
!
important!
procedure
1.
2.
3.
warning
http://www.tyan.com
6
Chapter 1
Introduction
Chipset Information •Intel 440BX AGPset with PIIX4e (S1856S)
•V ia Apollo Pro Plus: 82C596A+82C692
(S1856S-V)
•W inbond ‘977 Super I/O chipset
V oltage and Power •ATX power supply connector
Information •+12V power source for DC fan onboard
•3.3V DRAM support
•Utilizes GTL+ bus to reduce power
consumption and EMI
Main Memory •Up to 768MB onboard*
•Three 168-pin DIMM sockets
•Supports 100MHz SDRAM with SPD
System Management •Optional Analog Devices ADM9240 ASICs
with onboard alarm for monitoring temperature,
supply voltages, and fan speed
•Intel LANDesk Client Manager software optn
•Chassis intrusion detection capable
Expansion Slots •One 32-bit AGP slot
•Five 32-bit PCI Bus Master slots
•T wo 16-bit ISA slots
•One shared, seven usable slots
Physical Dimensions •ATX design
•12 inches x 8.2 inches
•S1856 requires Intel Venus
compatible I/O shield
•S1856SLA (with sound) requires Intel Cave
man compatible I/O shield
BIOS Information •AMI Plug and Play flash BIOS (S1856S)
•A ward Plug and Play flash BIOS (S1856S-V)
•Deep Green, Energy S tar, ACPI, Year 2000, and
PC98 compliant
•Soft power-down, multiple boot options
•W in98/NT5 ready , DMI 2.0 compliant
•PCI 2.1, APM 1.1 compliant
S1856 T omahawk BX/A+
7
INTRO
Disk Drive & System I/O •T wo PCI bus mastering EIDE channels
•Supports EIDE CD-ROMs
•PIO Mode 3 & 4 (up to 17MB/sec DTR)
•UltraDMA/33 bus mastering mode (up to
33MB/sec DTR)
•Support for two floppy drives (up to 2.88MB)
•T wo serial ports (16550 UAR T s)
•One ECP/EPP parallel port
•One IR (InfraRed) I/O interface port
•T wo USB rev 1.2 (universal serial bus)
connectors
•One PS/2 mouse port
•One PS/2 keyboard port
•One Analog V ideo Out port
Ensoniq ES 1373 PCI Audio •AC97 Codec
(S1856SLA only) •Uses a single, shared IRQ
•High performance PCI bus master
•Spatial enhanced 3D sound (SWS)
•Wavetable synthesis built in
•Joystick, Audio in, Speaker, Microphone
connectors
* Only 384MB validated at time of print.
Software Specifications
OS •Operates with MS-DOS, W indows 3.x,
Windows for W orkGroup 3.x, W indows 95,
W indows 98, Windows NT, OS/2, Novell
Netware, Solaris, and SCO Unix
T echnical Support
If a problem arises with your system, you should turn to your dealer for help
first. Your system has most likely been configured by them, and they should
have the best idea of what hardware and software your system contains.
Hence, they should be of the most assistance. Further, if you purchased your
system from a dealer near you, you can actually bring your system in to them
to have it serviced, instead of attempting to do so yourself (which can have
http://www.tyan.com
8
Chapter 1
Introduction
expensive consequences).
Help resources:
1. See FAQ and beep codes sections of this manual.
2. See Tyan web site for F AQ, bulletins, driver updates, etc.
http://www .tyan.com
3. Contact your dealer or distributor for help BEFORE calling T yan.
4. Check the Tyan user group: alt.comp.periphs.mainboard.tyan
5. Email T yan tech support: techsupport@tyan.com
6. Call Tyan tech support: 510-440-8808
Returning Merchandise for Service
During the warranty period, contact your distributor or system vendor FIRST
for any product problems. This warranty only covers normal customer use and
does not cover damages incurred during shipping or failure due to the
alteration, misuse, abuse, or improper maintenance of products.
For Resellers Only:
A receipt or copy of your invoice marked with the date of purchase is required
before any warranty service can be rendered. You can obtain service by calling
the manufacturer for a Return Merchandise Authorization (RMA) number . The
RMA number should be prominently displayed on the outside of the shipping
carton and the package should be mailed prepaid, or hand-carried to the
manufacturer . TYAN will pay to have the board shipped back to you.
S1856 T omahawk BX/A+
9
INTRO
This page left blank intentionally .
http://www.tyan.com
10
Chapter 2
Board Installation
chapter 2
Board Installation
Unpacking
The motherboard package should contain the following:
(1 ) S1856 mainboard
( 1) 40-pin IDE and 34-pin floppy cable pack
(1 ) S1856 User’s Manual
(1 ) Driver disk
Installation
You are now ready to install your motherboard. The mounting hole pattern of
the S1856 matches the ATX system board specifications. Your chassis should
support a standard ATX mainboard form factor.
How to install our products right...the first time.
What’s the first thing I should do?
The first thing you should do is read this user’s manual. It contains important
information which will make configuration and setup much easier .
Here are some precautions you should follow when installing your motherboard:
S1856 T omahawk BX/A+
11
procedure
1.
2.
3.
INST ALL
(1) Ground yourself properly before removing your motherboard
from the antistatic bag. Unplug the power from your computer
and then touch any metal part on the computer case. (Or wear a
grounded wrist strap.)
(2) Hold the motherboard by its edges and do not touch the bottom of
the board.
(3) A void touching motherboard components, IC chips, connectors,
and leads.
(4) A void touching pins of memory modules and chips.
(5) Place motherboard on a grounded antistatic surface or on the
antistatic bag.
Having reviewed the precautions above, the next step is to take the motherboard out of the cardboard box and static bag, hold it by its edges, and place it
on a grounded antistatic surface, component side up. Inspect the board for
damage.
DO NOT APPL Y POWER TO THE BOARD IF IT HAS BEEN DAMAGED!
Press down on any of the socket ICs if it appears that they are not properly
seated (the board should still be on an antistatic mat). Do not touch the bottom
of the board. Remember, don’ t take any electronic device out of its protective
bag until you are ready to actually install it into the computer case. If you do
not ground yourself, you risk zapping the motherboard or adapter card.
Subsequent problems may not arise immediately because electrostatic discharge damage, unlike physical damage, causes the device to fail over time.
Installation Steps
1. Set Jumpers
2. Mount Motherboard in Chassis
3. Install Memory
4. Install CPU & Cooling Fan
5. Connect IDE and Floppy Drives
6. Connect Power Supply
7. Install Add-on Cards
8. Connect PS/2, USB, Serial and Parallel Devices
!!
!!
!
important!
http://www.tyan.com
12
Chapter 2
Board Installation
Quick References for Jumpers
In this manual, the terms “closed” and “on” are used when referring to jumpers
(or jumper pins) that are active; “open” and “off” are used when referring to
jumpers (or jumper pins) that are inactive. See the Figure 2-1 for examples of
“on” and “off” pins and jumpers. The square pin in the diagram is Pin 1.
Jumpers and pins are connected by slipping the blue plastic jumper connector
overtop of two adjacent jumper pins (indicated by 1-2 or 2-3). The metal rod
inside the plastic shell bridges the gap between the two pins, completing the
circuit. See Figure 2-2 for more example of pin connections.
Figure 2-1 Figure 2-2
The tables and maps on the following pages will help you set the jumpers for
CPU speed, Infrared, and external connector pin assignments, among others.
The miniature motherboard maps will help you locate the jumpers on your board.
A full-page map of the motherboard can be found on the next two pages.
2 pin jumpers
off on
3 (or more) pin jumpers
1-2 2-3 open
1
2
3
1
2
3
1
2
3
S1856 T omahawk BX/A+
13
INST ALL
The tiny “1”s next to jumpers of 3 pins or more indicate the position of pin 1
for that jumper.
Figure 2-3 : Map of Motherboard Jumpers
JP10
JP11
JP12
JP13
USB1
Keyboard
USB2
Mouse
DIMM bank 2
DIMM bank 3
DIMM bank 1
Primary IDE connector
3 volt
lithium
battery
COM2
COM1
Printer Port
PCI slot 2
PCI slot 3
AGP port
PCI slot 4
PCI slot 5
ISA slot 2
ISA slot 1
Flash BIOS
1
J47
Intel 82443BX
OR
Via 82C693
PCI slot 1
Socket 370
CPU
Intel
82371EB
OR
Via 82C596A
FAN2
1
Secondary IDE connector
Floppy drive connector
ATX power connector
ADM9240
EXTSMI
1
JP1
1
JP2
Ensoniq
Audio PCI
1
J11
1
J13
J10
1
1
1
CON3
CON2
Joystick
Line in
Microphone in Speaker out
J7
JP17
1
1
1
FAN1
1
Chassis Intrusion
J48 (Spkr)
http://www.tyan.com
14
Chapter 2
Board Installation
Winbond Super I/O
3 DIMM slots
Socket 370 for
Celeron CPU
PS/2 Mouse &
Keyboard
ports
Floppy port
ATX power
supply header
5 PCI slots2 ISA slots 2x AGP port
Battery
2 USB ports
1 Parallel, 2 Com
ports
2-ch EIDE
Intel 440BX or Via Apollo
Pro Plus AGPset
BIOS
Audio ports Joystick
Figure 2-4 : Map of S1856 Features
S1856 T omahawk BX/A+
15
INST ALL
!!
!!
!
important!
1. Setting Jumpers
1-A. CPU Speed Settings (Jumpers JP10, JP11, JP12, JP13)
There are two steps to set the CPU speed. First, set the clock multiplier with
jumpers JP10 -13 according to the specification of your CPU using the chart
below. After the system is ready to boot up you will need to set the bus speed
in the BIOS setup. This is covered in detail in Chapter 3 of this manual.
Presently all Celeron CPUs use a 66MHz bus speed. Tyan does not recommend
operating CPUs, memory , or PCI Bus at higher than rated speed. Tyan takes no
responsibility for any problems related to overclocking any bus or component
on the system board.
Mu l ti pl i er Bus S peed CPU speed JP 10 JP 11 JP 12 JP 13
(set Jm prs
on board)
(set in
BIOS)
3.5 100 350 ON OFF OFF ON
4 100 400 OFF ON O N ON
66 300
100 450
66 333
100 500
66 366
100 550
66 400
100 600
6.5 66 433 ON ON OFF OFF
7 66 466 ON OFF ON OFF
OFFONONON
OFF OFF OFF ON
OFF ON OFF ON
OFF OFF ON ON
4.5
5
5.5
6
JP10, JP11,
JP12, JP13
http://www.tyan.com
16
Chapter 2
Board Installation
1-B. Bus Speed Settings (JP1)
1-C. Panel Connector Settings (Jumper J47)
VCC
12
PowerLED
HDD LED
34
Sleep LED
Ground
56
PowerOn/Off
Reset
78
Ground
VCC
910
No Connect
IR R e c e i v e
11 12
VCC
Ground
13 14
No Connect
IR T r an s mit
15 16
VCC
No Connect
17 18
No Connect
*Power LED: For 2-pin:
bicolor/single color Use pins 2-4
For 3-pin: bicolor Use pins 2-4 and GND pin 13
1-D. Speaker Connector
(Jumper J48)
The speaker should be
connected to pins 1-4 of
jumper J48. As default, pins
3-4 of jumper J48 are
connected to the internal
buzzer .
1-E. Wake-On LAN (CON3)
1-F. Wake-On Ring (CON2)
12
34
56
78
901
1121
3141
5161
7181
To p
Bottom
Top Pin
Bottom Pin
J10 Side V iew
J47
Pin1
Pin17
Pin2
otuA66
001
1PJ
2-13-2nepO
S1856 T omahawk BX/A+
17
INST ALL
!!
!!
!
important!
1-G. Clear CMOS and Reset Password (Jumper JP3)
tluafeDteseR
3PJ
2-13-2
If you have been locked out of your system because you forgot your password or set the CMOS incorrectly , follow the instructions below .
1. Power off the system
2. Set jumper JP2 to pins 2 and 3
3. Wait for 2 seconds, then return jumper JP2 to pins 1 and 2.
4. Power on the system again.
By following this procedure, you will erase your password and reset the
CMOS to the BIOS defaults.
Fan Speed Detect
When using Intel’s LANDesk
system management software,
you may monitor the status of
the CPU Fans by connecting
them to the Fan1 and/or Fan2
connectors. You will NOT be
able to monitor your CPU fan
with the other Fan connectors.
Soft Power Connector
The Soft Power Connector is
part of jumper block J47. The
T omahawk BX/A+ uses the chipset for power management, including turning
on and off the system. If the Power Button Function option in the BIOS Power
Management Menu is set to On/Off (which is the default), pressing the power
button once after the BIOS has booted up will turn the system on and off. If
the Power Button Function option is set to Suspend, pressing the power
button once will wake the system or send it to Suspend mode. In this case,
you cannot turn the system off unless you shut down through the Windows
operating system or you hold the power button down for four seconds.
CON3
(WOL)
J9
J48 (Speaker)
CON2
(WOR)
JP2 Clr CMOS
http://www.tyan.com
18
Chapter 2
Board Installation
!!
!!
!
important!
Hardware Reset Switch Connector Installation
The Reset switch on your case’s display panel provides you with the Hardware Reset function, which is the same as power on/off. The system will do a
cold start after the Reset button is pushed.
Creative Labs Audio Connectors (S1856SLA only)
There are four black 4-pin connectors onboard which are used for various
peripherals’ audio signals. The digital signal that comes in through these
connectors is directed through the Creative Labs ES1373 PCI sound chip, and
the digital signal is turned into an audio signal which goes out through the
speaker . The TDA connector (J10) is for modem audio; the MPEG connector
(J9) is for DVD and TV cards; the VIDEO connector is (J11); the CD connector
(J13) is for CD-ROMs.
External SMI
The EXTSMI (External System Management Interface) connector, jumper JP16,
is used by some plug-in cards. Certain applications associated with these plugin cards use the interface for hardware control and queries.
Chassis Intrusion Alarm Connector
The J7 connector is an intrusion alarm, that can be connected to the system
chassis. When active (J7 is connected to the chassis), this alarm will alert the
system administrator anytime someone opens the system’s case.
CMOS RTC
The Real Time Clock (RTC) circuit, which provides the date and time for the
system is integrated into the 440BX or V ia Apollo Pro Plus AGPset. If the
external battery for the R TC is low , it will prevent your system from POSTing,
and you will not get a display . Normally the life span of an external battery is 2
years. If yours is running low , you will need to replace it with a new 3V lithium
battery (Sony CR2032).
Flash EEPROM
The T omahawk BX/A+ uses flash memory to store BIOS firmware. It can be
updated as new versions of the BIOS become available. You can upgrade your
BIOS easily using the flash utility (see page 59).
S1856 T omahawk BX/A+
19
INST ALL
2. Mounting the Motherboard in the Chassis
Follow the instructions provided by the case manufacturer for proper installation guidelines. TYAN recommends that you use only one screw to hold down
the motherboard. The rest of the mounting holes should be used for the plastic
standoffs. If your case does not have a hole for a standoff, simply cut off the
bottom of the plastic standoff so that the flat portion rests on the metal. The
adapter cards and the screws holding them down will keep your board flat. The
fastening screw should not short any of the traces on the motherboard. Make
certain that you do not overtighten the screw , as it will damage the motherboard and possibly break internal traces in the surrounding area. The hole you
should use is located at the top-center of the board where the adapter cards
are fastened to the case.
3. Installing Memory
Since TYAN boards are manufactured with performance in mind, you should
use add-in components that match. Some DIMM modules may seem to be high
quality because of name or feel but that does not guarantee real-world
usability . Some cheaper or OEM memory may have brand-name components,
but they may contain inferior or substandard parts which do not meet the
critical tolerances our products require. Because of this, your memory may not
work correctly in a TYAN board though it may work well in a competitor’s
board. This is because many of our competitors do not adhere to the strict
tolerances required for high performance. If you buy a TYAN board, you are
getting the best system available. To make installation easy and trouble free,
get high quality parts. Some brands we recommend are Advantage Memory,
Corsair Microsystems, Millenium, Kingston Memory , QesT ec Incorporated,
Unigen, Micron Technology, and Crucial Technology. These DIMMs have
proven to be very stable on our boards and perform extremely well.
!!
!!
!
important!
http://www.tyan.com
20
Chapter 2
Board Installation
Figure 13
Figure 2-5
To install your DIMMs, line your module up so that the pins fit into the slot.
There is only one way that your DIMM can fit properly. Make sure that the
short row of pins is lined up with the short gap in the DIMM slot. Figure 2-5
shows how to sit the DIMM into its slot. To insert the DIMM, push down
vertically on the module with even force, as shown in the photo. Do not shove
one end in first; doing so will bend the DIMM pins.
To lock the DIMM into place, push the plastic clips on either end of the slot
onto the notches in the ends of the DIMM (see Figure 2-6 on the next page).
T o remove your DIMM, simply pull the clips back, and pull up on the module.
Place the DIMMs in an anti-static bag as soon as you remove them to avoid
static damage.
S1856 T omahawk BX/A+
21
INST ALL
Figure 2-6
The T omahawk BX/A+ uses a 64-bit data path from memory to CPU and can
accommodate up to 768MB of SDRAM. The 168-pin DIMMs (Dual In-line
Memory Modules) must be of the 3.3V, unbuffered variety . The position of the
notch in the SDRAM key position will tell you whether or not a DIMM is
unbuffered (see the Figure 2-7 below). All installed memory will be automati-
cally detected, so there is no need to set any jumpers.
Figure 2-7
RFU
Buffered
Unbuffered
168-pin DIMM
http://www.tyan.com
22
Chapter 2
Board Installation
Some details of memory installation:
• At least one unbuffered DIMM must be installed for the system to POST.
• The mainboard supports 32MB, 64MB, 128MB SDRAM; and supports
256MB registered SDRAM DIMM modules*, but not in combination with
non-registered modules.
• PC-100 DIMM is required if CPU bus speed is at 100MHz
The table below shows some of the possible memory configurations. Not all
possible configurations are listed.
*256MB modules not validated at time of print. See www .tyan.com for latest
memory compatibility information.
1knaBMMID2knaBMMID3knaBMMIDlatoT
1xBM800BM8
1xBM81xBM80BM61
1xBM81xBM81xBM8BM42
1xBM611xBM81xBM8BM23
1xBM611xBM611xBM8BM04
1xBM611xBM611xBM61BM84
1xBM231xBM611xBM61BM46
1xBM231xBM231xBM61BM08
1xBM231xBM231xBM23BM69
1xBM461xBM231xBM23BM821
1xBM461xBM461xBM23BM061
1xBM461xBM461xBM46BM291
1xBM8211xBM461xBM46BM652
1xBM8211xBM8211xBM46BM023
1xBM8211xBM8211xBM821BM483
1xBM6521xBM6520*BM215
1xBM6521xBM6521xBM652*BM867
S1856 T omahawk BX/A+
23
INST ALL
Cache Memory
Celeron processors have the L2 (Level 2) cache built into their architecture, so
there is no need for an L2 cache on the motherboard. The Celeron processor
has a physical L2 cache size of 128KB and a cacheable memory area of 512MB.
4. Installing the CPU and Cooling Fan
Socket 370 type Celeron processors (300 through 400MHz) can be used on the
T omahawk BX/A+. Please refer to page 15 for the correct CPU jumper settings for
your CPU. Remember:
• The CPU is a sensitive electronic component and it can easily be damaged
by static electricity . Do not touch the CPU pins with your fingers. Yo u
should be able to insert the CPU into the socket with virtually zero force.
Do not press down hard on the CPU as you will bend or break pins.
Pin 1 on the CPU is
denoted by a small dot
on one of the corners
and Pin 1 on the ZIF
socket is denoted by an
angled corner . Never
force a CPU into a
socket. Forcing a CPU
to seat will bend the
pins on the CPU and
possibly damage the
motherboard. Check
with your vendor or
manufacturer for proper
voltage selection.
Figure 2-8
Push down lightly on the CPU, and lower the arm on the ZIF socket to secure
the CPU. A squeaking noise is normal as the arm lowers. After the CPU is
securely seated, install the appropriate cooling device. Tyan strongly
recomends a heatsink/fan combination. Consult with your case manufacturer
for other cooling options.
http://www.tyan.com
24
Chapter 2
Onboard Resource Settings
Locate the cooling fan connector (e.g. CPU Fan, J4) on the motherboard. Plug the
CPU’ s cooling fan cable into the cooling fan connector on the board. There will
be a plastic clip assembly similar to that of the ATX power connector that will
force you to connect the fan cable correctly (see Figure 2-9 below).
You will need to connect the CPU’s fan cable to the fan power connector on
the board. Locate the fan connector (e.g. FAN1) on the motherboard. Plug the
CPU’ s fan cable into the fan connector . There will be a plastic clip assembly
similar to that of the ATX power connector that will force you to connect the
fan cable correctly .
5. Connecting IDE and Floppy Drives
The colored stripe on a ribbon cable should face toward the battery on the
motherboard. Make sure that Pin 1 (denoted by a red stripe) is connected so
that it is next to the power connector of the drive. The primary IDE connector
is black; the secondary IDE connector is white. In most cases, this is the
proper way of connecting your IDE cable to the hard drive. Figure 2-10 on the
next page shows the IDE cable properly connected to the motherboard.
Contact your hard disk drive manufacturer or documentation for more information.
Figure 2-9
S1856 T omahawk BX/A+
25
ONBOARD
Some symptoms of incorrectly
installed HDDs are:
• Hard disk drives are
not auto-detected:
may be a Master/
Slave problem or a
bad IDE cable.
Contact your vendor.
• Hard Disk Drive Fail
message at bootup:
may be a bad cable or
lack of power going
to the drive.
• No video or beeps on
bootup: usually
means the cable is on
backwards.
• Hard drive lights are
constantly on: bad
IDE cable or defective drives/motherboard. Try another HDD.
• Hard drives do not power up: check power cables and cabling.
May also be a bad power supply or IDE drive.
Connecting Floppy Drives
Pin 1 on the floppy cable is usually denoted by a red or colored stripe down one
side of the cable (see Figure 2-11 on the following page). Most of the current
floppy drives on the market require that the colored stripe be positioned so that it
is right next to the power connector . In most cases, there will be a key pin on the
cable which will force you to connect the cable properly .
Drive A: is usually attached to the end of the cable with the twist in it. Drive B: is
usually connected to the middle of the cable. Refer to your installation instructions or call your dealer if you are unsure about attaching floppy drives. Refer to
Figure 2-12 for a detailed anatomy of the floppy cable. Remember, you can only
have 2 floppy drives connected at any given time.
The color stripe on the cable should face toward the top of your chassis, or
toward the battery on the motherboard. Please refer to your documentation for
proper installation.
Figure 2-10
Pin 1
Loading...