AP41
User’s Guide
Copyright
Copyright Ó 1995 by this company. All rights reserved. No part of
this publication may be reproduced, transmitted, transcribed, stored in
a retrieval system, or translated into any language or computer
language, in any form or by any means, electronic, mechanical,
magnetic, optical, manual or otherwise, without the prior written
permission of this company.
ii
Disclaimer
This company makes no representations or warranties, either
expressed or implied, with respect to the contents hereof and
specifically disclaims any warranties, merchantability or fitness for any
particular purpose. Any software described in this manual is sold or
licensed "as is". Should the programs prove defective following their
purchase, the buyer (and not this company, its distributor, or its
dealer) assumes the entire cost of all necessary servicing, repair, and
any incidental or consequential damages resulting from any defect in
the software. Further, this company reserves the right to revise this
publication and to make changes from time to time in the contents
hereof without obligation to notify any person of such revision or
changes.
AMI is a registered trademark of American Megatrends Inc.
Intel is a registered trademark of Intel Corporation.
PC XT/AT is a registered trademark of International Business Machines Corporation.
iii
Copyright
Other brand and product names are trademarks and/or registered trademarks of their
respective holders.
iv
FCC Statement
FCC Class B Radio Frequency
Interference Statement
Note:
This equipment has been tested and found to comply with the limits
for a Class B digital device, pursuant to Part 15 of FCC Rules. These
limits are designed to provide reasonable protection against harmful
interference in a residential installation. This equipment generates,
uses, and can radiate radio frequency energy and, if not installed and
used in accordance with the instructions, may cause harmful
interference to radio communications. However, there is no
guarantee that interference will not occur in a particular installation. 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 to correct the interference by one or
more of the following measures:
1. Reorient or relocate the receiving antenna.
2. Increase the separation between the equipment and receiver.
3. Connect the equipment into an outlet on a circuit different from that
to which the receiver is connected.
4. Consult the dealer or an experienced radio/television technician for
help.
Notice 1:
The changes or modifications not expressly approved by the party
responsible for compliance could void the user's authority to operate
the equipment.
Notice 2:
Shielded interface cables, if any, must be used in order to comply with
emission limits.
iv
About this Manual
Purpose and Scope
This manual tells how to install and configure the system board.
Organization
This manual consists of three chapters and two apendices:
Chapter 1, Features, covers the specifications, layout, and components of
the system board.
Chapter 2, Hardware Setup, tells how to set the jumpers, upgrade the CPU
and the system memory, install the system board and add expansion cards.
Chapter 3, AMI BIOS, explains the system BIOS and tells how to configure
the system by setting the BIOS parameters.
Appendix A, Jumper Summary, gives you a tabular summary of the jumper
settings discussed in Chapter 2.
Appendix B, SiS Drivers, tells how to install the drivers supported by SiS.
v
About this Manual
Conventions
The following conventions are used in this manual:
Text entered by user,
default settings
Represent text input by the user,
default settings and recommended
selections
message displayed
Denotes actual messages that appear
on screen
a, e, s, etc
Represent the actual keys that you
have to press on the keyboard.
NOTE
Gives bits and pieces of additional
information related to the current topic.
WARNING
Alerts you to any damage that might
result from doing or not doing specific
actions.
CAUTION
Suggests precautionary measures to
avoid potential hardware or software
problems.
IMPORTANT
Reminds you to take specific action
relevant to the accomplishment of the
procedure at hand.
TIP
Tells how to accomplish a procedure
with minimum steps through little
shortcuts.
vi
Table of Contents
1 Features
Specifications.......................................................1-2
Board Layout.......................................................1-3
System Board Parts.............................................1-4
Microprocessor............................................1-4
ASICs 1-4
AMI BIOS....................................................1-4
Expansion Slots..........................................1-5
DRAM Sockets............................................1-5
Two-Channel PCI Mode 4 IDE...................1-5
Super I/O Controller....................................1-6
Keyboard Connector...................................1-6
SRAM1-6
Power Management....................................1-6
2 Hardware Setup
CPU Options........................................................2-1
5V CPU Options..........................................2-1
3.45 V CPU Options....................................2-2
ESD Precautions.................................................2-2
Installing a Microprocessor..................................2-3
Upgrading the Microprocessor............................2-4
Jumper Settings...................................................2-5
vii
Table of Contents
Changing the CPU Type.............................2-7
Setting the Oscillator Frequency..............2-14
Setting the Flash ROM Type....................2-14
Selecting the ECP DMA Channel.............2-15
Enabling the FDC and Super I/O Chip.....2-15
Selecting the Cache Size..........................2-16
Clearing the CMOS...................................2-18
Memory Configuration.......................................2-18
Installing a SIMM......................................2-19
Removing a SIMM....................................2-20
Connectors........................................................2-21
Multifunction Connector............................2-21
Keyboard Connector.................................2-23
Power Connector......................................2-24
Break/Suspend Connector........................2-24
Fan Power Connectors.............................2-25
External Battery Connector.......................2-26
Installation..........................................................2-27
Installing the System Board......................2-27
Installing Expansion Boards.....................2-28
3 AMI BIOS
AMI BIOS Setup Main Menu...............................3-1
Standard CMOS Setup........................................3-2
viii
Table of Contents
Date/Time....................................................3-2
Floppy Drives A and B................................3-3
Hard Disk Drives.........................................3-4
Advanced CMOS Setup......................................3-5
Typematic Rate (Chars./Sec.)....................3-7
System Keyboard........................................3-7
Primary Display...........................................3-7
Above 1 MB Memory Test..........................3-8
Memory Test Tick Sound............................3-8
Hit “Del” Message Display..........................3-8
Extended BIOS RAM Area.........................3-8
Wait for F1 If Any Error...............................3-8
System Boot-up Num Lock.........................3-9
Numeric Processor Test.............................3-9
Floppy Drive Seek at Boot..........................3-9
Floppy Drive Swapping...............................3-9
System Boot-up Sequence.........................3-9
System Boot-up CPU Speed....................3-10
Turbo Switch Function..............................3-10
Password Checking..................................3-10
CPU Selection...........................................3-10
Cache3-10
Shadow C800, D000, D800, 32K.............3-12
ix
Table of Contents
Video Shadow...........................................3-12
Main BIOS Cacheable..............................3-12
Cacheable C800, D000, D800, 32 K........3-12
Video Shadow Cacheable........................3-13
Secondary IDE Drives Present.................3-13
Primary 1st IDE Block Mode.....................3-13
Primary 2nd IDE Block Mode....................3-13
Secondary 1st IDE Block Mode................3-14
Secondary 2nd IDE Block Mode...............3-14
Chipset Setup Mode.................................3-15
Chipset Features Setup.....................................3-15
Memory Speed (DRAM)............................3-17
Cache Speed (SRAM)..............................3-17
CPU-to-PCI Memory Post Write Buffer....3-18
CPU-to-Memory Burst Write.....................3-18
DRAM Type (Refresh)..............................3-18
Power Management Setup................................3-22
BIOS Power Management Mode..............3-22
Advanced Power Management................3-24
Doze Timer................................................3-24
Standby Timer...........................................3-24
Suspend Timer..........................................3-24
Wake-up Events........................................3-25
x
Table of Contents
Monitor Type.............................................3-25
Display Off After........................................3-25
HDD Off After............................................3-25
Deturbo After.............................................3-26
Break Switch.............................................3-26
Peripheral Setup................................................3-26
Programming Mode..................................3-27
Onboard FDC............................................3-27
Serial Port 1..............................................3-27
Serial Port 2..............................................3-27
Parallel Port...............................................3-27
IRQ Active.................................................3-28
Parallel Port Mode....................................3-28
Utility Setup........................................................3-28
Detect Master and Detect Slave...............3-28
Color Set...................................................3-29
Default Setup.....................................................3-30
Original......................................................3-30
Optimal......................................................3-30
Fail-safe....................................................3-31
Security Setup...................................................3-32
Password..................................................3-32
Anti-virus...................................................3-34
xi
Table of Contents
Exit Setup..........................................................3-35
NCR SCSI BIOS and Drivers............................3-36
Appendix A Jumper Summary
Appendix B SiS Drivers
xii
Chapter
Features 1
The AP41 is a 486-based system board that utilizes the PCI/ISA
architecture. It supports the 486SX, DX, DX2, and DX4 series
microprocessors. It has four ISA-AT and three PCI slots for future
expansion. The system memory is expandable to 128 MB by adding
single in-line memory modules (SIMMs). The second-level cache is
upgradable to 512 KB and supports both the write-back and writethrough modes.
Two SiS application-specific integrated circuit (ASIC) chipsets with
built-in two-channel, PCI mode 4 IDE controller and a super I/O
controller are also incorporated in the design to further enhance
system performance. The board measures 220 mm x 250 mm (babyAT size).
User’s Guide 1-1
Features
Specifications
Microprocessor 5V CPUs
Intel SL-enhanced
Intel SX/DX/DX2
AMD DX/DX2
Cyrix DX/DX2
Intel P24D
Intel P24T
3.45V CPUs
Intel DX4
AMD DX2
AMD DX4/DX4-S
Cyrix DX2/DX4/5X86
TI DX2
Maximum Memory 128 MB
SIMM Sockets Four 72-pin, 32-bit
ASICs SiS85C496
SiS85C497
Bus Architecture ISA, PCI
Expansion Slots Four ISA slots, Three PCI slots
Ports One parallel port (ECP/EPP)
Two serial ports
Two-channel PCI mode 4 IDE
One floppy disk connector
Onboard Battery CR2032 3.0V lithium battery
RTC 146818 built-in 85C497
Secondary Cache 128 KB/256 KB/512 KB
BIOS AMI Plug-and-Play WinBIOS
Board Size 220 mm x 250 mm (baby-AT)
1-2 User’s Guide
Features
Board Layout
1. Keyboard connector 11. HDD LED connector
2. COM1 connector 12. BIOS
3. COM2 connector 13. ISA slots
4. Power connector 14. PCI slots
5. 72-pin SIMM sockets 15. Keyboard controller
6. ZIF-type CPU socket 16. IDE2 connector
7. 2-pin fan connector 17. IDE1 connector
8. 4-pin fan connector 18. FDD connector
9. Tag SRAM 19. Battery
10. Second-level cache 20. Parallel port connector
User’s Guide 1-3
Features
System Board Parts
Microprocessor
The AP41 system board supports the Intel SL-enhanced, Intel 486SX/
DX/DX2/DX4, AMD 486DX/DX2/DX4/DX4-S, Cyrix
486DX/DX2/DX4/5X86 and TI 486DX2 series microprocessors.
Chapter 2 gives details on how to upgrade the processor.
1-4 User’s Guide
Features
ASICs
The two ASICs onboard are the SiS85C496 and SiS85C497. The
SiS85C496 acts as the PCI and CPU memory controller (PCM). It
integrates the host bridge, the cache and main memory DRAM
controller, the PCI bridge, the built-in IDE controller and the Fast Slow
Link (FS-Link) bus.
The SiS85C497 is the AT-bus controller and megacell (ATM)
component that acts as an interface the PCI/CPU/memory bus and
the ISA bus.
AMI BIOS
The AMI BIOS (basic input-output system) resides in the flash ROM
chip. This contains the program that performs the power-on self-tests
(POST) upon booting. During POST, this program activates the
peripheral devices, tests onboard memory, and prepares the system
for operation. Chapter 3 gives more information on the AMI BIOS.
Expansion Slots
The board expansion slots consist of four ISA-AT and three PCI slots.
These expansion slots are the parallel bars on the system board.
There are rows of golden pins inside each slot that serve as a clutch
to secure the contacts of expansion boards. Chapter 2 tells how to
install expansion boards.
User’s Guide 1-5
Features
DRAM Sockets
The system board has four 72-pin DRAM sockets that expand system
memory from 1 MB to a maximum of 128 MB. These sockets accept
single- and double-density SIMMs. Chapter 2 tells how to install
memory modules.
Two-Channel PCI Mode 4 IDE
The board utilizes the enhanced-integrated drive electronics (E-IDE)
interface that improves the data transfer rate. It also allows the
system to support four E-IDE devices, including fixed disks with more
than 528-MB capacity. This feature offers users increased data
storage capacity.
Super I/O Controller
The onboard super I/O controller chip supports two UART
16450/16550-compatible serial ports and a parallel port (SPP, EPP,
ECP)1. It also accommodates 1.2-/1.44-/2.88-MB disk drives allowing
full-range access to 5.25-inch drives with 360-KB or 1.2-MB format
and 3.5-inch drives with 720-KB, 1.44-MB or 2.88-MB format.
Keyboard Connector
The keyboard connector at the rear of the system board allows you to
connect any AT-compatible keyboard.
1
SPP: Standard Parallel Port
EPP: Enhanced Parallel Port (IEEE 1284 compliant)
ECP: Extended Capabilities Port (IEEE 1284 compliant)
1-6 User’s Guide
Features
SRAM
The system board supports 128-KB, 256-KB and 512-KB secondlevel, write-back and write-through cache.
Power Management
The AP41 conforms to the power-saving standards of the U.S.
Environmental Protection Agency (EPA) Energy Star program. The
system board features four power-saving modes that reduce power
consumption. For more information on the power-saving modes, see
Chapter 3.
User’s Guide 1-7
Chapter
Hardware Setup 2
This chapter discusses the CPU options, tells how to set jumpers,
upgrade system memory, add expansion boards, and install the
system board.
Install the CPU, memory, and set the jumpers before you install the
system board inside a system housing. You may add the other
components after installing the board. Read this chapter to learn
about the components before you install them.
CPU Options
The system board supports both 5V and 3.45V CPUs. The following
tables list the CPU options for this system board.
5V CPU Options
5V CPU Type Speed (MHz)
Intel series
(SL-enhanced)
486SX
486DX
486DX2
P24D
P24T
25/33
33
50/66
50/66
63/83
AMD series 486DX
486DX2
33/40
50/66/80
Cyrix 486DX
486DX2
33/40
50/66
User’s Guide 2-1
Hardware Setup
3.45 V CPU Options
3.45V CPU Type Speed (MHz)
Intel 486DX4 75/100
AMD 486DX2 66/80
AMD 486DX4 100
AMD 486DX4-S 100/120
Cyrix DX2 V50/V66/V80
Cyrix DX4 100/120
Cyrix 5X86 100
TI DX2 66/80
ESD Precautions
Electrostatic discharge (ESD) can damage your CPU, disk drives,
expansion boards, and other components. Always observe the
following precautions before you install a system component.
1. Do not remove a component from its protective packaging until
you are ready to install it.
2. Wear a wrist grounding strap and attach it to a metal part of the
system unit before handling components. If a wrist strap is not
available, maintain contact with the system unit throughout any
procedure requiring ESD protection.
2-2 User’s Guide
Hardware Setup
Installing a Microprocessor
The motherboard has a zero-insertion force microprocessor socket
that allows you to install a CPU without using any tools.
Follow these steps to install a CPU in a ZIF-type upgrade socket:
Make sure that the system power is OFF
before installing any component.
1. Pull up the socket lever.
2. Insert the CPU with the attached heatsink and fan. Make sure
that pin 1 of the CPU aligns with hole 1 of the socket. The hole
on the upper right corner of the center box indicates pin 1.
User’s Guide 2-3
Pin 1
indicator
Hole 1 indicator
CPU SOCKET
Hardware Setup
3. Pull down the socket lever to lock the CPU into the socket.
4. Plug the fan cable into the onboard fan connector.
5. Set the jumpers accordingly. See the following sections for the
correct jumper settings.
Upgrading the Microprocessor
Follow these steps to upgrade the CPU:
1. Turn off the system power.
2. Pull up the socket lever.
3. Remove the installed CPU.
4. Install the upgrade CPU. Refer to the section Installing a
Microprocessor for instructions on how to install a CPU.
2-4 User’s Guide
Hardware Setup
Jumper Settings
You have to change the jumper settings when you reconfigure the
system. This section tells how to reset the jumpers. The figure below
shows the jumper locations.
Set a jumper switch as follows:
· To close a jumper switch, insert the plastic jumper cap over two
pins of a jumper.
· To open a jumper switch, remove the jumper cap.
User’s Guide 2-5
Hardware Setup
The following conventions are used to represent the proper jumper
settings.
When you open a jumper, attach the
plastic jumper cap to one of the pins so
you won't lose it.
2-6 User’s Guide
Open
Closed (2-3 position)
Hardware Setup
Changing the CPU Type
You must set jumpers JP11 to JP23 and JP40 according to the CPU
type. The board supports both 5V and 3.45V CPUs. Make sure that
you know your CPU type and its operating voltage before you begin.
Improper setting of jumpers may result in system failure.
5V CPU Type
For Intel processors, you must determine if your CPU is SL-enhanced
or not. To check, simply look for the "&" symbol in the third row on the
lower label of the CPU.
The P24D processor looks very similar to an Intel SL-enhanced CPU
except for the letter “W” in the third row on the lower label of the CPU.
The letter “W” indicates that the CPU supports the write-back mode.
The following figure shows how to determine an Intel SL-enhanced
CPU and a P24D CPU.
User’s Guide 2-7
SL-ENHANCED
INDICATOR
WRITE-BACK MODE
INDICATOR
Hardware Setup
5V CPU TYPE JUMPER SETTINGS
2-8 User’s Guide
JP11
JP12
JP13
JP14
JP15
JP16
JP17
JP18
JP19
JP20
JP21
JP22
JP23
JP40
Hardware Setup
3.45V CPU Type
INTELDX4 CPUS
You must be able to determine your IntelDX4 CPU type before you
set the jumpers. Improper setting may result to system malfunction.
There are two types of 3.45V IntelDX4 CPUs: one with write-through
mode support while the other is with write-back mode support. To
determine an IntelDX4 CPU with write-back internal mode, look for the
letter “W” in the third row on the lower label of the CPU. The letter
“W” indicates write-back mode. An IntelDX4 CPU with write-through
internal mode does not have this indication. See the following figure.
User’s Guide 2-9
Hardware Setup
AMD DX4 CPUS
The 3.45V AMD DX4 processors come in three types: AMD DX4
(V8T), AMD DX4-S(SV8T) and AMD DX4-S(SV8B). The AMD DX4
(V8T) is a non SL-enhanced CPU that supports write-through internal
cache mode. The AMD DX4-S(SV8T) is an SL-enhanced CPU that
supports write-through internal mode. The AMD DX4-S(SV8B) is also
an SL-enhanced CPU but with write-back internal cache mode
support.
To determine your AMD CPU type, check the second row of your
CPU label. An SL-enhanced AMD DX4 CPU has a letter “S” following
the “AMD DX4-100” label. The last letter (i.e., either “B” or “T”)
indicates the CPU cache mode supported. See the following figure.
2-10 User’s Guide
AMD 486DX4 (V8T)
(w/out SMM support)
AMD 486DX4-S
(SV8T)
AMD 486DX4-S
(SV8B)
“T” indicates write-through “S”: SL-enhanced “S”: SL-enhanced
mode “T” indicates “B” indicates
write-through mode write-back mode
Hardware Setup
CYRIX DX4 CPUS
There are two types of Cyrix DX4 CPUs: Cyrix DX4 with iDX4 pinout
and Cyrix DX4 with M7 pinout.
To determine the Cyrix DX4 CPU pinout, check the CPU label. A
Cyrix DX4 with iDX4 pinout has a “DX4 P/O” indication on the second
row of the lower CPU label. A Cyrix DX4 with M7 pinout does not
have this indication and the lower CPU label has only two rows. See
the figure below.
User’s Guide 2-11
iDX4
pinout
indication
iDX4 Pinout M7 Pinout
Hardware Setup
3.45V CPU TYPE JUMPER SETTINGS
2-12 User’s Guide
JP11
JP12
JP13
JP14
JP15
JP16
JP17
JP18
JP19
JP20
JP21
JP22
JP23
JP40
Hardware Setup
User’s Guide 2-13
JP11
JP12
JP13
JP14
JP15
JP16
JP17
JP18
JP19
JP20
JP21
JP22
JP23
JP40
Hardware Setup
Setting the Oscillator Frequency
You must reset jumpers JP30, JP31 and JP32 if you change the
oscillator frequency.
Setting the Flash ROM Type
Set jumper JP4 according to the type of Flash ROM in use. If the
system uses a 5V EEPROM (or 5V Flash ROM) instead of a 12V
Flash ROM, you must set the jumper to 2-3. The default setting is
2-3.
2-14 User’s Guide
JP4
12V Flash ROM
5V EEPROM or Flash
ROM
25 MHz 33 MHz 40 MHz
JP30
JP31
JP32
Hardware Setup
Selecting the ECP DMA Channel
The jumpers JP2 and JP3 are used to select the DMA channel for
ECP function. The default channel is DMA 1.
Enabling the FDC and Super I/O Chip
The jumper JP1 is used to enable or disable the floppy disk controller
(FDC) and the super I/O chip. The SMC665 onboard I/O chip
supports two serial ports, one parallel port and FDD functions. Set
the jumper to Disabled if you want to use a separate I/O card.
User’s Guide 2-15
JP1
ENABLED
JP2 JP3
DMA 1
DMA 3
DISABLED
Hardware Setup
Selecting the Cache Size
The system board supports 128-KB, 256-KB, and 512-KB, write-back
and write-through second-level cache. See the table below for the
possible cache configurations.
The second-level cache is upgradable from 128 KB to 512 KB. The
system supports both write-back and write-through modes.
Cache
Size
TAG SRAM
(U31)
Data SRAM Location
128 KB 16 Kb x 8 or
32 Kb x 8
32 Kb x 8 x 4 pcs. Bank 0
256 KB 16 Kb x 8 or
32 Kb x 8
32 Kb x 8 x 8 pcs. Banks 0 and 1
256 KB 16 Kb x 8 or
32 Kb x 8
64 Kb x 8 x 4 pcs. Bank 0
512 KB 32 Kb x 8 64 Kb x 8 x 8 pcs. Banks 0 and 1
512 KB 32 Kb x 8 128 Kb x 8 x 4 pcs. Bank 0
Follow these steps to install SRAMs:
1. Locate the cache sockets on the system board. See the section
Board Layout.
2. Insert the SRAM chip into the socket. Align the straight edge of
the chip with the straight edge of the socket. Also, make sure
that the cut edge of the chip corresponds to the cut edge of the
cache socket. See the figure below.
Always install SRAMs beginning with Bank 0.
2-16 User’s Guide
Hardware Setup
Press the SRAM chip gently but firmly into
place. Be careful not to bend the pins.
When upgrading the cache, install the SRAM chips and set jumpers
JP24, JP25, JP26, JP27 and JP29 accordingly. See the following
figure.
User’s Guide 2-17
JP24
JP25
JP26
JP27
JP29
128 KB 256 KB 256 KB 512 KB 512 KB
32 Kb x 4 32 Kb x 8 64 Kb x 4 64 Kb x 8 128 Kb x 4
Hardware Setup
Clearing the CMOS
The 3-pin jumper JP37 is used to clear the values in the CMOS. You
need to clear the CMOS if you forget your system password. To do
this, shut off the system power and short pins 2-3 of JP37 for a few
seconds. Then set the jumper to the normal setting by closing pins 12 with a jumper cap. Enter Setup to specify a new password.
Memory Configuration
The system memory is upgradable from 1 MB to 128 MB. The four
72-pin SIMM sockets accommodate 1-, 4-, 16- and 64-MB singledensity SIMMs, and 2-, 8- and 32-MB double-density SIMMs with
70/60-ns DRAM speed.
The table below lists the SIMM types and their corresponding
capacities.
SIMM Type Capacity
256 Kb x 32/36 1 MB
512 Kb x 32/36 2 MB
1 Mb x 32/36 4 MB
2 Mb x 32/36 8 MB
4 Mb x 32/36 16 MB
8 Mb x 32/36 32 MB
16 Mb x 32/36 64 MB
2-18 User’s Guide
NORMAL
JP37
CLEAR CMOS
Hardware Setup
The SIMM sockets accept any DRAM
combinations that satisfy the 128 MB
maximum memory.
Installing a SIMM
Observe the ESD precautions when
installing components.
Follow these steps to install a SIMM:
1. Slip a SIMM at a 45o angle into a socket with the component side
facing down.
Be careful when inserting or removing
SIMMs. Forcing a SIMM in or out of a
socket can damage the socket or the
SIMM (or both).
2. Gently push the SIMM up until the pegs of the socket slip into the
holes on the SIMM and the holding clips lock the SIMM into a
vertical position.
The SIMM should be at a 90o angle when
installed.
User’s Guide 2-19
Hardware Setup
Removing a SIMM
1. Press the holding clips on both sides of the SIMM outward to
release it.
2. Press the SIMM downward to about a 45o angle.
3. Gently pull the SIMM out of the socket.
2-20 User’s Guide
Hardware Setup
Connectors
Multifunction Connector
This 20-pin connector is marked CN5 on the system board. It
supports a number of system functions: LED, turbo, reset, keylock,
and speaker. Attach the front panel connectors to the corresponding
pins as in the illustration below.
( Turbo Switch ) ( Turbo LED )
Break Switch Green Mode LEDReset
Speaker Power LED Keylock
Some housings have a five-pin connector for the keylock and power
LED. See the following illustration.
User’s Guide 2-21
Reset Turbo Switch Turbo LED
(Green Mode LED)
Speaker Power LED Keylock
Hardware Setup
Speaker Keylock & Power LED
Break Switch Green Mode LED
( Turbo Switch ) ( Turbo LED )
Reset
Other housings may have a 12-pin connector. If your housing has
this type of connector, plug it into CN5 as shown in the following
figure. Make sure that the red wire of the connector connects to pin
11.
( Turbo Switch )
Break Switch
Ground
VCC
Ground
Ground
Keylock
Reset
Res-VCC
Speaker
2-22 User’s Guide
Reset Turbo Switch Turbo LED
(Green Mode LED)
Speaker Keylock and Power LED
Turbo Switch
Hardware Setup
Turbo LED/Green Mode LED
You can use the CN5 LED connector either for the Turbo function or
for the Green Mode function. However, you cannot use both
functions at the same time. To use the LED for turbo, you need to
connect the turbo switch into the CN5 multifunction connector. Take
note that in turbo mode, the LED is on. In deturbo mode, the LED is
off.
To use the LED for the green function, you need to connect the break
switch into JP9 (i.e, the break switch connector). The green mode
LED is always on regardless of the system mode.
Keyboard Connector
The keyboard connector is a 5-pin, AT-compatible connector. The
following figure shows how to connect a keyboard.
User’s Guide 2-23
Hardware Setup
Power Connector
A standard power supply has two cables with six wires each. Attach
these cables to the power connector on the board in such a way that
all the black wires are in the center.
Break/Suspend Connector
The Break/Suspend connector is a 3-pin connector labeled JP9 on
the system board. Pressing the break switch on the front bezel forces
the system to enter the suspend mode. Pressing any key on the
keyboard returns the system to normal mode.
2-24 User’s Guide
Hardware Setup
You cannot use the break switch and the
turbo switch at the same time.
User’s Guide 2-25
Hardware Setup
Fan Power Connectors
The board comes with one 2-pin and one 4-pin fan power connector.
The 2-pin fan power connector is marked JP43 on the system board.
To connect, plug the connector to its corresponding pin as shown in
the following figure.
To connect the 4-pin fan power connector, simply plug it into the 4-pin
connector marked JP46 on the system board.
2-pin fan power connector (J2)
GND
2-26 User’s Guide
+12V
+5V +12V
GND
JP43
JP46
Hardware Setup
External Battery Connector
The 4-pin external battery connector is marked JP35 on the system
board. This is used to connect an external battery in case your
system board does not have an onboard battery or the 146818
RTC/battery.
To connect an external battery, simply plug the battery connector into
JP35. Make sure that the positive end of the connector corresponds
to pin 1. See the illustration below.
User’s Guide 2-27
JP35
1
1
Hardware Setup
Installation
The baby-AT size of the AP41 system board easily fits most housings.
It has mounting holes that conform to the standard system housing.
Some housings may differ slightly in design, requiring additional steps
to install the board. Read the documentation that comes with the
housing.
Make sure that you have already installed
the system board components like the
CPU and memory, and have set the
appropriate jumpers before you proceed.
Installing the System Board
1. Open the system housing.
2. Use at least two screws that come with the housing to secure the
board.
3. Attach the power supply cables to the power connector and the
front panel connectors to the multifunction connector. See the
section Connectors.
4. Install any additional components that you have not yet installed.
2-28 User’s Guide
Hardware Setup
Installing Expansion Boards
Install any expansion boards after you have installed the system
board into the housing.
Follow these steps to install an expansion board.
1. Remove the bracket opposite the slot that you want to use. Save
the cover for future use. Save the screw to secure the expansion
board.
2. Remove the board from its protective packaging.
3. Gently insert the golden edge of the board into the slot until it fits
into place.
4. Secure the board bracket with the screw.
User’s Guide 2-29
Golden Edge
PCI Slot
Golden
Edge
ISA Slot
Chapter
AMI BIOS 3
AMI BIOS Setup Main Menu
The AMI BIOS Setup Main Menu appears below. Press c to enter the
system menu.
The AMI BIOS is in Windows form. You can use either the keyboard
or a mouse to move between the items. To select among the Setup
groups, use v to highlight the selected group or simply click on the
icon of the selected Setup menu.
To select among the options, you can either use the arrow keys to
move the highlight bar or simply click on the icon of the desired
option.
After selecting, press e or double-click on the icon to open the menu.
User’s Guide 3-1
AMI BIOS
Standard CMOS Setup
Highlight Setup using v or simply click on the Setup icon. Select
Standard to input configuration values such as the date, time, and disk
types. The Standard CMOS Setup pop-up window appears below:
Date/Time
To set the date and time, highlight Date/Time and press e or doubleclick on the Date/Time icon. The following screen appears:
Use the arrow keys to move among the items. Press + and - or click
the + and - icons to set the current date and time. Close the window
by pressing e or double-clicking the Control menu box in the upper-left
corner of the window.
3-2 User’s Guide
AMI BIOS
Floppy Drives A and B
To configure the floppy drive, select Floppy A. The following values
appear on the screen:
After selecting the proper setting, press e or double-click the Control
menu box to close the window.
Select Floppy B and follow the same procedure to configure the
second floppy drive, if present.
User’s Guide 3-3
AMI BIOS
Hard Disk Drives
Select Master Disk to configure the first hard disk. The following
values appear on the screen:
Press } to move to the next page. Use w or y to highlight the
selected parameter. If you cannot find your hard disk drive type on
the list, select User and enter the disk parameters. You can also
select Utility Setup. This automatically configures your hard disk.
Refer to the section Utility Setup for more information.
Select ESDI or SCSI depending the device installed.
If you have two hard disks installed, select Slave Disk and follow the
same procedure to configure the second hard disk.
3-4 User’s Guide
AMI BIOS
Advanced CMOS Setup
The window below appears if you select Advanced from the main
menu.
The screen above does not show all the parameters of the Advanced
Configuration menu. Use w or y to highlight the desired parameter.
Press } to view the rest of the parameters. The following screens
appear:
User’s Guide 3-5
AMI BIOS
3-6 User’s Guide
AMI BIOS
Typematic Rate (Chars./Sec.)
This parameter determines the typematic rate. The typematic rate
settings are 15, 20, 30, and Disabled. The default setting is 30.
Set it to Disabled to disregard the rate setting.
User’s Guide 3-7
AMI BIOS
System Keyboard
Set this parameter to Present if there is a keyboard connected to
the system. However, some servers may not have keyboards.
Select Absent if there is no keyboard present.
Primary Display
This function detects the type of VGA in use. The settings are
VGA/EGA, CGA 40 x 25, CGA 80 x 25, Mono, and Absent. The
default setting is VGA/EGA.
Above 1 MB Memory Test
This parameter allows your system to check all available memory.
Therefore, setting this parameter to Enabled slows down the poweron self-test. The default setting is Disabled.
Memory Test Tick Sound
Enabling this parameter lets you hear the tick sound during the
memory test. Disable the parameter to bypass the function.
Hit “Del” Message Display
Disabling this option prevents the Hit <Del> if you want
Setup message from appearing when the system boots. The
settings are Enabled or Disabled.
3-8 User’s Guide
AMI BIOS
Extended BIOS RAM Area
This function allows you to relocate the BIOS from ROM to RAM.
Relocating to RAM enhances system performance as information
access is faster than ROM. The parameter settings are 0:300 and
DOS 1K. The default address is 0:300.
Wait for F1 If Any Error
If this option is enabled, the BIOS waits for the end user to press l
before continuing. If this option is disabled, the BIOS continues the
boot process without waiting for l to be pressed.
System Boot-up Num Lock
Setting this parameter to On enables the numeric function of the
numeric keypad. Set this parameter to Off to disregard the function.
Disabling the numeric function allows you to use the numeric keypad
for cursor control. The default setting is On.
Numeric Processor Test
This parameter is non-configurable and auto-detected by the system.
If the CPU in use is a DX CPU, this parameter is automatically set to
Enabled. However, for the SX CPU, the setting is changed to
Disabled. This is because the SX CPU does not have an
integral numeric coprocessor.
Floppy Drive Seek at Boot
When enabled, the BIOS detects whether there is a floppy disk drive
installed. Disable the parameter to bypass the function.
User’s Guide 3-9
AMI BIOS
Floppy Drive Swapping
This parameter allows you to swap floppy drives. For example, if you
have two floppy drives (A and B), you can assign the first drive as
drive B and the second drive as drive A or vice-versa. Disable the
parameter to bypass the function. The default is Disabled.
System Boot-up Sequence
The settings are C:,A: and A:,C: to specify the system search
sequence. The default setting is A:,C:.
System Boot-up CPU Speed
Set the system speed to High or Low with this parameter. High is
the default setting.
Turbo Switch Function
This parameter lets you enable or disable the turbo switch function.
The default setting is Enabled.
Password Checking
The settings are Setup and Always. The Setup setting allows the
system to boot and use the password only to protect the Setup Utility
Configuration settings from being tampered with. The Always setting
requires you to enter the password everytime you boot the system.
The default setting is Setup.
3-10 User’s Guide
AMI BIOS
CPU Selection
The available settings for this parameter are Auto, Intel, AMD and
Cyrix. Check your CPU before setting this parameter. Otherwise,
select Auto to automatically configure the CPU. The default setting
is Auto.
Cache
External Cache
This parameter lets you enable or disable the secondary cache. The
default setting is Enabled. Leave it enabled unless you are
troubleshooting a problem.
External Cache Mode
The external cache can be set either to Write-back or Write-through
modes. The Write-back mode is faster than the Write-through mode.
The default is Write-back.
Cache Tag Width
This parameter lets you set the cache tag width. The available
settings are 8-bit and 7-bit. The default setting is 8-bit.
Internal Cache
This parameter lets you enable or disable the internal cache. The
default setting is Enabled. Leave it enabled unless you are
troubleshooting a problem.
User’s Guide 3-11
AMI BIOS
Internal Cache Mode
The internal cache is normally set to Write-through. If you are
using a Cyrix CPU, you may change the setting to Write-back for
better performance.
Intel P24D also supports the Write-back mode.
CPU Burst Write
This parameter enables or disables the CPU cache burst-write mode
for M7, P24D and P24T. The default setting is Disabled.
Shadow C800, D000, D800, 32K
This function is for shadowing other expansion card ROMs. The
default setting for these areas is Disabled. If you have other
expansion cards with ROMs on them, you need to know the specific
addresses that the ROMs use to shadow them. Enable all the ROM
Shadow settings if you don't know the addresses. This ensures the
shadowing of any present ROMs.
The F000 and E000 addresses are
exclusively shadowed for BIOS.
Video Shadow
The default setting for this parameter is Enabled. This copies the
video display card BIOS into the system DRAM to improve system
performance.
3-12 User’s Guide
AMI BIOS
Main BIOS Cacheable
The default setting for this parameter is Enabled. This enhances
the system performance. Disabling the parameter prevents the
system BIOS from being cached.
Cacheable C800, D000, D800, 32 K
The default setting for these parameters is Enabled. This
enhances the system performance. The Disabled setting prevents
these addresses from being cached.
Video Shadow Cacheable
The default setting for this parameter is Enabled. This copies the
video ROM area to RAM and therefore, enhances the system
performance. Disabling the parameter prevents the video BIOS from
being cached.
Secondary IDE Drives Present
This parameter allows you to connect a secondary IDE device to your
system. The default setting is None.
Primary 1st IDE Block Mode
This function enhances the performance of the primary IDE hard disk
connected to your IDE 1 connector. This parameter is normally set to
Disabled. If enabled, it allows data transfer in block (multiple
sectors) by increasing the data transfer rate. Disable the parameter if
your hard disk does not support this feature.
User’s Guide 3-13
AMI BIOS
Primary 2nd IDE Block Mode
This function enhances the performance of the secondary IDE hard
disk connected to your IDE 1 connector. This parameter is normally
set to Disabled. If enabled, it allows data transfer in block
(multiple sectors) by increasing the data transfer rate. Disable the
parameter if your hard disk does not support this feature.
Secondary 1st IDE Block Mode
This function enhances the performance of the primary IDE hard disk
connected to your IDE 2 connector. This parameter is normally set to
Disabled. If enabled, it allows data transfer in block (multiple
sectors) by increasing the data transfer rate. Disable the parameter if
your hard disk does not support this feature.
Secondary 2nd IDE Block Mode
This function enhances the performance of the secondary IDE hard
disk connected to your IDE 2 connector. This parameter is normally
set to Disabled. If enabled, it allows data transfer in block
(multiple sectors) by increasing the data transfer rate. Disable the
parameter if your hard disk does not support this feature.
LBA Mode
This enhanced IDE feature allows you to use a hard disk with a
capacity greater than 528 MB. This is made possible through the
Logical Block Address (LBA) mode translation. Set this parameter to
Enabled if your hard disk supports this feature. The default setting
is Disabled.
3-14 User’s Guide
AMI BIOS
32-bit Transfer
Normally, this parameter is set to Disabled. Enabling this function
improves disk performance by increasing the data transfer rate from
16-bit to 32-bit.
Chipset Setup Mode
This function allows you to change the Chipset Setup DRAM and
SRAM parameters according to the end-user type. The available
settings are End-user and Engineer. We recommend that you set this
parameter to End-user. See the following section for more details
about the Chipset Features Setup.
Chipset Features Setup
The Chipset Features Setup controls the board's chipset settings.
The controls for this menu are the same as for the previous screen.
The Chipset Setup DRAM and SRAM parameters differ depending on
the Chipset Setup Mode setting in the Advanced CMOS Setup. The
following screens appear if you select the Chipset option from the
Setup menu and if the Chipset Setup Mode parameter setting is End-
user:
User’s Guide 3-15
AMI BIOS
3-16 User’s Guide
AMI BIOS
The screen below appears if your Chipset Setup Mode parameter
setting is Engineer. Take note of the new parameters that
replaced the Memory Speed (DRAM) and the Cache Speed (SRAM)
parameters.
See screens 2,3 and 4 for the rest of the parameters.
This manual describes only the
parameters for End-user setting.
User’s Guide 3-17
AMI BIOS
Memory Speed (DRAM)
This parameter lets you set the DRAM speed. The supported DRAM
speeds are 70 ns and 60 ns. The default setting is 70 ns.
Cache Speed (SRAM)
This parameter lets you set the SRAM cache speed. The supported
DRAM speeds are 15 ns and 20 ns. The default setting is 20 ns.
CPU-to-PCI Memory Post Write Buffer
Enable this parameter to control the posting of the CPU-to-memory
write data in the posting buffers. Disable the parameter to deactivate
the buffering function.
CPU-to-Memory Burst Write
Enabling this parameter allows the translation of the host cycles into
memory-burst cycles and controls the memory burst-write cycles.
Disabling the function deactivates the memory burst writes.
DRAM Type (Refresh)
This parameter lets you select the DRAM type that you wish to
support. The options are Normal and Low Power. The low-power
DRAMs are special-type DRAMs. The default setting is Normal.
Motherboard IDE
To take advantage of the IDE features of the motherboard, you need
to set this parameter to Enabled. Disable the parameter to bypass
the feature.
3-18 User’s Guide
AMI BIOS
Primary Master PIO Mode
If this enhanced IDE parameter is set to Auto, it automatically
detects the PIO mode (mode 0, 1, 2, 3, 4) and sets the interface
timing of the master drive connected to the primary IDE connector. If
you know your HDD PIO mode, you can set this parameter manually.
The default setting is Auto.
Primary Slave PIO Mode
If this enhanced IDE parameter is set to Auto, it automatically
detects the PIO mode (mode 0, 1, 2, 3, 4) and sets the interface
timing of the slave drive connected to the primary IDE connector. If
you know your HDD PIO mode, you can set this parameter manually.
The default setting is Auto.
Secondary Master PIO Mode
If this enhanced IDE parameter is set to Auto, it automatically
detects the PIO mode (mode 0, 1, 2, 3, 4) and sets the interface
timing of the master drive connected to the secondary IDE connector.
If you know your HDD PIO mode, you can set this parameter
manually. The default setting is Auto.
Secondary Slave PIO Mode
If this enhanced IDE parameter is set to Auto, it automatically
detects the PIO mode (mode 0, 1, 2, 3, 4) and sets the interface
timing of the slave drive connected to the secondary IDE connector.
If you know your HDD PIO mode, you can set this parameter
manually. The default setting is Auto.
User’s Guide 3-19
AMI BIOS
For the PIO Mode parameters, we
recommend that you select Auto. This
automatically detects the correct PIO
mode of your HDD and prevents
configuration error caused by wrong data
entry.
PCI IDE Non-compliant Card
This parameter allows you to select your PCI IDE card slot. The
available selections are Slot 1, Slot 2, Slot 3 and Absent. Select
Absent if you do not have any PCI IDE cards installed.
Primary PCI IDE Card Uses
This parameter lets you assign an INT for the IDE device connected
to your primary IDE connector. The settings are INT A, INT B, INT C,
and INT D. If you do not have any PCI IDE cards installed in your
system, this parameter becomes non-configurable.
Secondary PCI IDE Card Uses
This parameter lets you assign an INT for the IDE device connected
to your primary IDE connector. The settings are INT A, INT B, INT C,
and INT D. If you do not have any PCI IDE cards installed in your
system, this parameter becomes non-configurable.
3-20 User’s Guide
AMI BIOS
PCI IRQ Allocation
The settings for this parameter are Auto and Manual. If you select
Auto, it automatically sets the IRQs and INTs for the PCI devices
installed in your system. If you want to configure your PCI device
parameters, select Manual.
PCI Slot 1/2/3 INT Connect
These parameters are configurable only if the PCI IRQ Allocation
parameter is set to Manual. This allows you to set the INT(s) for the
PCI devices. The selections are INT A, INT B, INT C and INT D.
Make sure that you assign a different INT for each PCI device
function.
IRQ CONNECT
This parameter is configurable only if the PCI IRQ Allocation
parameter is set to Manual. This allows you to set an IRQ for each
PCI device installed in your system. The selections are IRQ 3~7,
9~12, 14, and 15. Make sure that you assign a different IRQ for each
PCI device to avoid conflict.
IRQ TRIGGER
This parameter lets you set when to trigger the IRQ, i.e., either at the
Edge or Level of the signal.
ISA IRQ Manual Over Ride Parameters (IRQ 3, 4, 5, 7, 9, 10, 11, 12, 14 and 15)
These lines allow you to assign the available IRQs to either ISA or
PCI device.
User’s Guide 3-21
AMI BIOS
Power Management Setup
The screen below appears if you select Power Management from the
main menu. To select, highlight Power Mgmt and press e or doubleclick on the Power Management icon.
BIOS Power Management Mode
Enable this parameter to take advantage of the power-saving feature.
To enable, simply select an IRQ setting. The selections are IRQ 10,
IRQ 11, IRQ 12, IRQ 15 and Disabled. Disable the parameter to
bypass the feature. The default setting for this parameter is
Disabled.
When disabled, only the screen above appears on the monitor. When
enabled, it allows you to configure the power-saving feature. The
following screens appear if you enable the BIOS Power Management
parameter. Use w or y to highlight the desired parameter. Press } to
view the rest of the parameters.
3-22 User’s Guide
AMI BIOS
User’s Guide 3-23
AMI BIOS
If you are using OS/2, Windows NT, Novell or
UNIX operating systems, you must disable the
power management function.
Advanced Power Management
Set this parameter to Enabled to take full advantage of the powersaving feature. Disable the parameter to bypass the feature.
Doze Timer
This function reduces the CPU clock to 8 MHz. Full power returns
when an activity takes place. The available settings are 10 sec, 20
sec, 30 sec, 45 sec, 1 Min, 2 Min, 5 Min, 10 Min, 15 Min, 20 Min, 30
Min, 40 Min and Disabled.
Standby Timer
This function holds the CPU clock and suspends the video signal.
This activates the power-saving features on your monitor. Full power
returns when an event is detected. The available settings are 10 sec,
20 sec, 30 sec, 45 sec, 1 Min, 2 Min, 5 Min, 10 Min, 15 Min, 20 Min,
30 Min, 40 Min and Disabled.
Suspend Timer
The suspend timer stops the CPU internal clock and suspends the
video signal. Full power returns when activity is detected. The
settings are 10 sec, 20 sec, 30 sec, 45 sec, 1 Min, 2 Min, 5 Min, 10
Min, 15 Min, 20 Min, 30 Min, 40 Min and Disabled. This feature
conserves the most energy.
3-24 User’s Guide
AMI BIOS
Wake-up Events
Enabling these parameters allow your system to monitor the I/O
activities. Any activity detected resets the power-management timers
and resumes the system to normal mode.
You must enable at least one IRQ activity.
Otherwise, the system stays in suspend mode..
Monitor Type
This option lets you set the monitor type. The selections are Green
and Non-Green.
Display Off After
This parameter lets you set the display-off mode. The selections are
Doze, Suspend, Standby and Disabled. Once the system enters the
specified mode, the monitor screen turns blank. Monitors with green
function allows you to save more power since the system shuts down
the VH sync. once it enters the specified power-saving mode.
HDD Off After
This option lets you specify which mode to "spin down" your hard disk.
The disk returns to full speed once the system returns to normal
mode. The settings are Doze, Suspend, Standby and Disabled.
User’s Guide 3-25
AMI BIOS
Deturbo After
This function lets you specify the mode when to release the system
from turbo mode. The settings are Doze, Suspend, Standby and
Disabled.
Break Switch
This option lets you enable or disable the break switch. Enabling this
parameter allows the system to enter suspend mode and return to
normal mode by simply pressing the break switch. However, enabling
the break switch disables your turbo functions. Disable the parameter
to take advantage of the turbo functions.
Peripheral Setup
This screen appears if you select Peripherals or double-click on the
Peripheral Setup icon from the Setup menu. The Peripheral Setup
screen allows you to set up your system peripherals.
3-26 User’s Guide
AMI BIOS
Programming Mode
The settings for this option are Auto and Manual. The Manual setting
allows you to set up the screen items manually. The Auto setting sets
up all the items automatically except for the Parallel Port Mode
parameter.
Onboard FDC
Enabling this function allows you to use the onboard floppy disk
controller (FDC). The default setting is Enabled.
Serial Port 1
This parameter allows you to set the base address of serial port 1.
The available settings are 3F8H, 2F8H, 3E8H, 2E8H and Disabled.
The default setting is 3F8H.
Serial Port 2
This parameter allows you to set the base address of serial port 2.
The available settings are 3F8H, 2F8H, 3E8H, 2E8H and Disabled.
The default setting is 2F8H.
Parallel Port
This parameter allows you to set the base address of the parallel port.
The available settings are 3BCH, 378H, 278H and Disabled. The
default setting is 378H.
User’s Guide 3-27
AMI BIOS
IRQ Active
This option specifies if the parallel and serial port IRQs are active high
or active low. The default setting is High.
Parallel Port Mode
This option lets you set the parallel port mode. The settings are
Normal, SPP, EPP & SPP, ECP and ECP & EPP. The default setting
is Normal.
Utility Setup
Detect Master and Detect Slave
These functions allow your system to automatically configure the hard
disk. This screen appears if you select Detect Master or Detect Slave
option.
After a few seconds, the screen below appears showing your disk
parameters. Select Yes to accept the values.
3-28 User’s Guide
AMI BIOS
Color Set
This pop-up window appears if you select Color Set from the Utility
Setup menu.
Color Set lets you select the color of your windows background. The
selections are LCD, Army, Pastel, and Sky.
User’s Guide 3-29
AMI BIOS
Default Setup
Select this option to automatically set your system configuration
parameters. To select, highlight Default and press e.
Original
This option loads the values that you saved before shutting off the
system. The following prompt appears if you select Original from the
Default Setup menu. Choose Yes to load the original values.
Optimal
Choose this option and the BIOS configures the system using the
best-case values to optimize system performance. However, these
values may not be applicable to your system. If your system does not
boot after choosing this setting, reconfigure it using the Fail-safe
settings. Refer to the following section.
The screen below appears if you choose Optimal from the Default
Setup menu. Select Yes to load the optimum values.
3-30 User’s Guide
AMI BIOS
Fail-safe
Choose this option and the BIOS automatically configures the system
using the most stable settings. These settings are not necessarily the
best settings for system performance, but safe and stable enough to
guarantee you that your system will boot. This is useful if you are
having problems with your current system configuration and need to
determine the cause.
A prompt appears if you choose Fail-safe from the Default Setup
menu. Select Yes to load the fail-safe values.
User’s Guide 3-31
AMI BIOS
Security Setup
Password
The system password prevents unauthorized use of your computer. If
you enabled the password feature, it is impossible to boot the
computer without entering the password.
To set a password, highlight Password or simply double-click the
Password icon. The following screen appears:
Your password can consist of up to six characters. The password
does not appear on the screen. WinBIOS prompts you to retype the
password. The following screen appears.
3-32 User’s Guide
AMI BIOS
If you forget your password, you must clear the CMOS RAM and
reconfigure the system.
To disable the password, press e when prompted for your password.
Press e again when prompted to retype the password.
User’s Guide 3-33
AMI BIOS
Anti-virus
Set this parameter to Enabled to protect the boot sector and
partition table of your hard disk from virus intrusion. Set it to
Disabled to bypass the feature.
A prompt appears when you select Anti-virus from the Security Setup
menu:
Select Enabled and the screen below appears:
3-34 User’s Guide
AMI BIOS
Exit Setup
To exit Setup, you can either double-click on the Control menu box or
simply press ^. A dialog box appears on the screen.
If you select Save Changes and Exit, BIOS automatically
saves all CMOS values before leaving Setup. Select Do Not Save
Changes and Exit to exit Setup without saving the CMOS
values. Select Continue to return to Setup if you want to
reconfigure your system.
User’s Guide 3-35
AMI BIOS
NCR SCSI BIOS and Drivers
The NCR 53C810 SCSI BIOS resides on the same flash memory chip
as the system BIOS. To use the onboard NCR BIOS, you need to
install an NCR 53C810 SCSI controller card in your system.
All SCSI devices that you install in your system require software
drivers. The NCR SCSI BIOS directly supports SCSI hard disks
under DOS, Windows and OS/2. It also uses DOS-format and SCO
UNIX-format support floppy disk device drivers that come with the
NCR 53C810 SCSI controller card. The DOS-format device drivers
are for SCSI devices used with DOS, Windows NT, Novell NetWare
and OS/2. The SCO UNIX-format device drivers are for SCSI devices
used with SCO UNIX. These drivers offer higher performance than
the direct BIOS support.
To use the device drivers, you must install them in your system hard
disk drive and add them to your system configuration files. For
detailed installation instructions, see the README files that come with
the drivers.
The system board also supports the AMI
Flash Memory Writer Utility that allows you
to upgrade the system BIOS. For more
information on this utility, contact your
local distributor.
3-36 User’s Guide
AMI BIOS
User’s Guide 3-37
Appendix
Jumper Summary A
CPU Type
5V CPU TYPE
Intel 486SX
SL-enhanced
Intel
486DX/DX2
SL-enhanced
Intel P24D Intel P24T
JP11 2-3 2-3 1-2 1-2
JP12 1-2 1-2 1-2 1-2
JP13 Open Open Open 1-2
JP14 Open Open 1-2 Open
JP15 Open Open 1-2 Open
JP16 Open Open 1-2 1-2
JP17 3-4 3-4 1-2, 3-4 3-4
JP18 2-3 1-2, 3-4 1-2, 3-4 1-2, 3-4
JP19 Open Open Open 1-2
JP20 Open 3-4 3-4 2-3
JP21 4-5 4-5 4-5 1-2
JP22 1-2 1-2 2-3 Open
JP23 2-3 2-3 2-3 2-3
JP40 1-3, 2-4 1-3, 2-4 1-3, 2-4 1-3, 2-4
Intel/AMD
486SX
Intel/AMD
486DX/DX2
Cyrix
486DX/DX2
JP11 2-3 2-3 2-3
JP12 Open Open 1-2
JP13 Open Open Open
JP14 Open Open Open
JP15 Open Open Open
JP16 Open Open 2-3
JP17 Open Open 2-3
JP18 2-3 1-2, 3-4 1-2, 3-4
JP19 Open Open 2-3
JP20 Open 3-4 3-4
JP21 Open Open 2-3
JP22 Open Open Open
JP23 Open Open 1-2
JP40 1-3, 2-4 1-3, 2-4 1-3, 2-4
User’s Guide A-1
Jumper Summary
3.45V CPU TYPE
Intel
486DX4
(W/T)
Intel
486DX4
(W/B)
AMD
486DX2
AMD
486DX4
(V8T)
AMD
486DX4-S
(SV8B)
AMD
486DX4-S
(SV8T)
JP11 2-3 1-2 2-3 2-3 1-2 2-3
JP12 1-2 1-2 Open Open 1-2 1-2
JP13 Open Open Open Open Open Open
JP14 Open 1-2 2-3 Open 1-2 Open
JP15 Open 1-2 Open Open 1-2 Open
JP16 Open 1-2 Open Open 1-2 Open
JP17 3-4 1-2, 3-4 Open Open 1-2, 3-4 3-4
JP18 1-2, 3-4 1-2, 3-4 1-2, 3-4 1-2, 3-4 1-2, 3-4 1-2, 3-4
JP19 Open Open Open Open Open Open
JP20 3-4 3-4 3-4 3-4 3-4 3-4
JP21 4-5 4-5 Open Open 4-5 4-5
JP22 1-2 2-3 Open Open 2-3 1-2
JP23 2-3 2-3 Open Open 2-3 2-3
JP40 3-5, 4-6 3-5, 4-6 3-5, 4-6 3-5, 4-6 3-5, 4-6 3-5, 4-6
Cyrix
486DX2
Cyrix
486DX4
(iDX4 P/O)
Cyrix
486DX4
(M7 P/O)
Cyrix
5X86
TI
486DX2
JP11 2-3 2-3 2-3 2-3 2-3
JP12 1-2 1-2 1-2 1-2 1-2
JP13 Open Open Open Open Open
JP14 Open 1-2 Open 1-2 Open
JP15 Open 1-2 Open 1-2 Open
JP16 2-3 1-2 2-3 1-2 2-3
JP17 2-3 1-2, 3-4 2-3 1-2, 3-4 2-3
JP18 1-2, 3-4 1-2, 3-4 1-2, 3-4 1-2, 3-4 1-2, 3-4
JP19 2-3 Open 2-3 Open 2-3
JP20 3-4 3-4 3-4 3-4 3-4
JP21 2-3 4-5 2-3 4-5 2-3
JP22 Open 2-3 Open 2-3 Open
JP23 1-2 2-3 1-2 2-3 1-2
JP40 3-5, 4-6 3-5, 4-6 3-5, 4-6 3-5, 4-6 3-5, 4-6
A-2 User’s Guide
Jumper Summary
Oscillator Frequency
25 MHz 33 MHz 40 MHz
JP30 1-2 1-2 1-2
JP31 2-3 1-2 1-2
JP32 2-3 1-2 2-3
Flash ROM Type
Type JP4
12V Flash ROM 1-2
5V EEPROM or Flash ROM 2-3
ECP DMA Channel
DMA Channel JP2 JP3
DMA 1 2-3 2-3
DMA 3 1-2 1-2
FDC and Super I/O Chip
Function JP1
Enabled 1-2
Disabled 2-3
User’s Guide A-3
Jumper Summary
Cache Type and Size
Cache Size JP24 JP25 JP26 JP27 JP29
32 KB x 4 = 128 KB 1-2 1-2 2-3 1-2 1-2, 3-4
32 KB x 8 = 256 KB 1-2 2-3 2-3 2-3 2-3, 4-5
64 KB x 4 = 256 KB 1-2 2-3 1-2 1-2 1-2, 3-4
64 KB x 8 = 512 KB 2-3 2-3 2-3 2-3 2-3, 4-5
128 KB x 4 = 512 KB 2-3 2-3 2-3 1-2 1-2, 3-4
CMOS
Function JP37
Normal 1-2
Clear CMOS 2-3
Onboard Connectors
Connector Function
JP6 HDD LED connector
CN5 Multifunction connector
JP35 External battery connector
JP43 2-pin fan connector
JP46 4-pin fan connector
JP45 Power connector
A-4 User’s Guide
Appendix
SiS Drivers B
This appendix tells how to install the SiS supported drivers using the
installation utility.
DOS, Windows, WFW (Workgroup) and NetWare
To install DOS, Windows, WFW (Workgroup) and NetWare drivers,
simply run INSTALL.EXE.
Windows NT
1. From the Windows NT Setup Options menu, select
Add/Remove SCSI Adapters.
2. Select the Add button in the SCSI Adapter Setup.
3. From the Adapter: list dialog box, select Others (Requires
a disk from a hardware manufacturer).
4. The Insert Diskette dialog box appears. Insert the SiS driver into
drive A and type A:WINNT.
5. The screen displays the Select OEM Option dialog box. Select
SiS 32-bit Local-bus IDE Adapter and click on
OK.
6. The Select SCSI Adapter Option dialog box appears. Click on
Install. This installs the drivers to the hard disk.
7. Installation is successful if the SCSI Adpater Setup dialog box
reappears and SiS 32-bit Local-bus IDE Adapter appears on
the list of installed drivers.
8. Reboot the system.
User’s Guide B-1
SiS Drivers
OS/2
1. From the OS/2 desktop, open the OS/2 system.
2. Open System Setup.
3. Select Device Driver Install.
4. Insert the driver diskette into drive A or B.
5. Change the source directory to A:\OS2 or B:\OS2.
6. Select Install.
7. Click on OK.
SCO UNIX
To install the SCO UNIX drivers, refer to the README.SCO file in the
SCO directory.
Installing SCO UNIX 3.2.X
1. Install SCO UNIX 3.2.4.X or SCO Open Desktop 2.X using the
default SCO UNIX IDE drivers.
2. Boot your SCO UNIX system and bring it into single-user mode.
3. Copy the SiS496.TAR file to your /TMP directory using the doscp
command. For example, if you are using drive A, type:
DOSCP A:SIS496.TAR/TMP
4. Prepare a SCO UNIX formatted diskette.
5. From the root directory, type the following commands:
MKDIR/SIS
B-2 User’s Guide
SiS Drivers
CD/SOS
TAR XVF/TMP/SIS486.TAR
6. Insert the diskette into the drive and enter the following
command:
TAR CVF/DEV/(diskette drive 0 device name)
Your diskette drive 0 device name may be:
· RFD096DS15 5.25 DSHD
· RFD0135DS18 3.5 DSHD
· RFD048DS9 5.25 DSHD
· RFD0135DS9 3.5 DSHD
7. Start the installation by typing CUSTOM.
8. Follow the screen instructions to install the SiS IDE driver. A new
kernel replaces the original kernel and the original kernel is
renamed as UNIX.OLD.
9. Reboot your system for the new kernel to take effect. The new
kernel initializes the chip to the new timing setting.
User’s Guide B-3
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