R
P5A-B
Pentium Super7 Motherboard
®
USER’S MANUAL
USER'S NOTICE
No part of this manual, including the products and software described in it, may be reproduced, transmitted, transcribed, stored in a retrieval system, or translated into any language in
any form or by any means, except documentation kept by the purchaser for backup purposes,
without the express written permission of ASUSTeK COMPUTER INC. (“ASUS”).
ASUS PROVIDES THIS MANUAL “AS IS” WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED
WARRANTIES OR CONDITIONS OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL ASUS, ITS DIRECTORS, OFFICERS, EMPLOYEES OR AGENTS BE LIABLE FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR
CONSEQUENTIAL DAMAGES (INCLUDING DAMAGES FOR LOSS OF PROFITS, LOSS
OF BUSINESS, LOSS OF USE OR DATA, INTERRUPTION OF BUSINESS AND THE
LIKE), EVEN IF ASUS HAc BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES ARISING FROM ANY DEFECT OR ERROR IN THIS MANUAL OR PRODUCT.
Product warranty or service will not be extended if: (1) the product is repaired, modified or
altered, unless such repair, modification of alteration is authorized in writing by ASUS; or (2)
the serial number of the product is defaced or missing.
Products and corporate names appearing in this manual may or may not be registered trademarks or copyrights of their respective companies, and are used only for identification or
explanation and to the owners’ benefit, without intent to infringe.
• ALi and Aladdin are trademarks of Acer Laboratories Inc. (ALi)
• Adobe and Acrobat are registered trademarks of Adobe Systems Incorporated.
• AMD, K6, and combinations thereof are trademarks of Advanced Micro Devices, Inc.
• Cyrix, M II, and combinations thereof are trademarks of National Semiconductor Corporation.
• IBM is a registered trademark of IBM Corporation.
• Intel, LANDesk, and Pentium are registered trademarks of Intel Corporation.
• Windows and MS-DOS are registered trademarks of Microsoft Corporation.
The product name and revision number are both printed on the product itself. Manual revisions are released for each product design represented by the digit before and after the period
of the manual revision number. Manual updates are represented by the third digit in the manual
revision number.
For previous or updated manuals, BIOS, drivers, or product release information, contact ASUS
at http://www.asus.com.tw or through any of the means indicated on the following page.
SPECIFICATIONS AND INFORMATION CONTAINED IN THIS MANUAL ARE FURNISHED FOR INFORMATIONAL USE ONLY, AND ARE SUBJECT TO CHANGE AT
ANY TIME WITHOUT NOTICE, AND SHOULD NOT BE CONSTRUED AS A COMMITMENT BY ASUS. ASUS ASSUMES NO RESPONSIBILITY OR LIABILITY FOR
ANY ERRORS OR INACCURACIES THAT MAY APPEAR IN THIS MANUAL, INCLUDING THE PRODUCTS AND SOFTWARE DESCRIBED IN IT.
Copyright © 1999 ASUSTeK COMPUTER INC. All Rights Reserved.
Product Name:
Manual Revision:
Release Date:
2
ASUS P5A-B
1.07 E381
April 1999
ASUS P5A-B User’s Manual
ASUS CONTACT INFORMATION
ASUSTeK COMPUTER INC. (Asia-Pacific)
Marketing
Address:
Telephone:
Fax:
Email:
150 Li-Te Road, Peitou, Taipei, Taiwan 112
+886-2-2894-3447
+886-2-2894-3449
info@asus.com.tw
Technical Support
Tel (English):
Tel (Chinese):
Fax:
Email:
Newsgroup:
WWW:
FTP:
+886-2-2894-3447 ext. 706
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tsd@asus.com.tw
news2.asus.com.tw
www.asus.com.tw
ftp.asus.com.tw/pub/ASUS
ASUS COMPUTER INTERNATIONAL (America)
Marketing
Address:
Fax:
Email:
6737 Mowry Avenue, Mowry Business Center, Building 2
Newark, CA 94560, USA
+1-510-608-4555
info-usa@asus.com.tw
Technical Support
Fax:
BBS:
Email:
WWW:
FTP:
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ASUS COMPUTER GmbH (Europe)
Marketing
Address:
Telephone:
Fax:
Email:
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49-2102-445011
49-2102-442066
sales@asuscom.de
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Hotline:
BBS:
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ftp.asuscom.de/pub/ASUSCOM
ASUS P5A-B User’s Manual
3
CONTENTS
I. INTRODUCTION ...........................................................................
How this Manual is Organized ........................................................
Item Checklist ..................................................................................
II. FEATURES ....................................................................................
ASUS P5A-B Motherboard .............................................................
Introduction to ASUS Smart Series Motherboards ..............
Parts of the ASUS P5A-B Motherboard ..........................................
III. INSTALLATION ..........................................................................
ASUS P5A-B Motherboard Layout .................................................
Installation Steps ..............................................................................
1. Jumpers ........................................................................................
Jumper Settings ....................................................................
Compatible Cyrix CPU Identification ..................................
2. System Memory (DIMM) ............................................................
DIMM Memory Installation Procedures: .............................
3. Central Processing Unit (CPU) ...................................................
4. Expansion Cards .........................................................................
Expansion Card Installation Procedure: ...............................
Assigning IRQs for Expansion Cards ...................................
Assigning DMA Channels for ISA Cards .............................
ISA Cards and Hardware Monitor ........................................
Accelerated Graphics Port ....................................................
5. External Connectors ....................................................................
Power Connection Procedures ...................................................
IV. BIOS SOFTWARE ........................................................................
Flash Memory Writer Utility ...........................................................
Main Menu .................................................................................
Managing and Updating Your Motherboard’s BIOS ..................
6. BIOS Setup .................................................................................
Load Defaults .......................................................................
Standard CMOS Setup ...............................................................
Details of Standard CMOS Setup .........................................
BIOS Features Setup ..................................................................
Details of BIOS Features Setup ............................................
Chipset Features Setup ...............................................................
Details of Chipset Features Setup .........................................
Power Management Setup ..........................................................
Details of Power Management Setup ...................................
PNP and PCI Setup ....................................................................
Details of PNP and PCI Setup ..............................................
4
ASUS P5A-B User’s Manual
7
7
7
8
8
9
11
12
12
14
14
15
18
19
20
21
23
23
23
24
24
24
25
35
36
36
36
38
39
40
40
40
43
43
45
46
49
49
52
52
CONTENTS
Load BIOS Defaults ...................................................................
Load Setup Defaults ...................................................................
Supervisor Password and User Password ..................................
IDE HDD Auto Detection ..........................................................
Save & Exit Setup ......................................................................
Exit Without Saving ...................................................................
V. SUPPORT SOFTWARE ................................................................
ASUS Smart Motherboard Support CD ...........................................
Desktop Management Interface (DMI) ............................................
Introducing the ASUS DMI Configuration Utility ...............
Starting the ASUS DMI Configuration Utility .....................
Using the ASUS DMI Configuration Utility ........................
VI. ASUS CIDB ...................................................................................
The ASUS CIDB Chassis Sensor ...............................................
Using the ASUS CIDB .........................................................
Setting up the ASUS CIDB ..................................................
ASUS CIDB Additional Considerations ..............................
VII. ASUS LAN Card .........................................................................
ASUS PCI-L101 Fast Ethernet Card ...............................................
Features ............................................................................................
Software Driver Support ............................................................
Question and Answer .................................................................
APPENDIX ..........................................................................................
Glossary ...........................................................................................
ASUS P5A-B User’s Manual
54
54
55
56
57
57
59
59
60
60
60
61
63
63
63
64
64
65
65
66
66
66
67
67
5
FCC & DOC COMPLIANCE
Federal Communications Commission Statement
This device complies with FCC Rules Part 15. Operation is subject to the following
two conditions:
•
•
This device may not cause harmful interference, and
This device must accept any interference received, including interference that
may cause undesired operation.
This equipment has been tested and found to comply with the limits for a Class B
digital device, pursuant to Part 15 of the 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 manufacturer’s 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:
•
•
•
•
Re-orient or relocate the receiving antenna.
Increase the separation between the equipment and receiver.
Connect the equipment to an outlet on a circuit different from that to which the
receiver is connected.
Consult the dealer or an experienced radio/TV technician for help.
WARNING! The use of shielded cables for connection of the monitor to the
graphics card is required to assure compliance with FCC regulations. Changes
or modifications to this unit not expressly approved by the party responsible for
compliance could void the user’s authority to operate this equipment.
Canadian Department of Communications Statement
This digital apparatus does not exceed the Class B limits for radio noise emissions
from digital apparatus set out in the Radio Interference Regulations of the Canadian
Department of Communications.
6
ASUS P5A-B User’s Manual
I. INTRODUCTION
I.
II.
III.
IV.
V.
VI.
VII.
Introduction
Features
Installation
BIOS Software
Support Software
ASUS CIDB
ASUS L101 Card
APPENDIX
I. INTRODUCTION
Sections/Checklist
How this Manual is Organized
Manual information and checklist
Information and specifications concerning this product
Instructions on setting up the motherboard
Instructions on setting up the BIOS software
Information on the included support software
Installation of the ASUS CIDB Chassis Sensor (optional)
Installation of the ASUS LAN card (optional)
Glossary of Terms
Item Checklist
Check that your package is complete. If you discover damaged or missing items,
contact your retailer.
(1) ASUS Motherboard
(2) 9-pin male serial external connector set
(1) 25-pin female parallel + 6-pin female PS/2 mouse external connector set
(1) IDE ribbon cable for master and slave drives
(1) Ribbon cable for (1) 5.25” and (2) 3.5” floppy disk drives
(1) Bag of spare jumpers
(1) CD disc with support drivers and utilities
(1) User’s Manual
Audio Bracket (only available with ISA audio option)
ASUS CIDB chassis sensor module (optional)
PS/2 Mouse, Infrared, USB1, and USB2 external connector module (optional)
ASUS PCI-L101 Wake-On-LAN 10/100 Ethernet Card (optional)
ASUS P5A-B User’s Manual
7
II. FEATURES
ASUS P5A-B Motherboard
•
•
II. FEA TURES
Features
•
•
•
•
•
•
•
•
•
•
•
8
ALi AGPset: ALi® (Acer Laboratories Inc.) Aladdin V AGPset with support for a
100MHz Front Side Bus (FSB), Accelerated Graphics Port (AGP), and all current
Socket-7 processors.
Multi-Processor/Multi-Speed Support: AMD K6™-III /400 & faster, AMD K6™2/266 & faster, AMD K6™/166 & faster, AMD K5™/90–133, IBM®/Cyrix® 6x86MX™/
M II™ (PR166 & faster), IDT WinChip 2™/240 & faster, IBM®/Cyrix® 6x86-PR166+
(Rev 2.7 or later), Intel Pentium® 90–233MHz (P55C-MMX™, P54C/P54CS).
Level 2 Cache SRAM/Tag RAM: Supports 512KB/1MB pipelined-burst SRAM/L2
memory cache and integrated Tag RAM to make using the 100MHz bus speed possible.
Enhanced ACPI and Anti-Boot Virus BIOS: Features a programmable BIOS, offering enhanced ACPI for Windows 98 compatibility, built-in hardware-based virus protection through Trend ChipAwayVirus, and autodetection of most devices for virtually
automatic setup.
PC100 Memory Support: Equipped with three DIMM sockets to support Intel
PC100-compliant SDRAMs (8, 16, 32, 64, 128, or 256MB) up to 768MB. These
new SDRAMs are necessary to meet the 95MHz/100MHz bus speed requirement.
AGP Slot: Supports AGP cards for high performance, component level interconnection targeted at 3D graphical display applications.
ISA Audio (optional): Features C-Media’s 3D positional sound chip, which provides such cutting edge features as wavetable music synthesizer, 3D surround audio,
and SPDIF I/O interface in addition to the usual compatibility with games written
for both Windows® 95/98 and DOS®.
UltraDMA/33 BM IDE: Comes with an onboard PCI Bus Master IDE controller
with two connectors that supports four IDE devices in two channels, supports
UltraDMA/33, PIO Modes 3 and 4 and Bus Master IDE DMA Mode 2, and supports
Enhanced IDE devices, such as Tape Backup and CD-ROM drives. Supports two
drives of either 5.25-inch (360KB or 1.2MB) or 3.5-inch (720KB, 1.44MB, or
2.88MB) disk drives. Supports Japanese “Floppy 3 mode” (3.5-inch disk drive:
1.2MB) and LS-120 floppy disk drives (3.5-inch disk drive: 120 MB, 1.44MB, 720K).
BIOS supports IDE CD-ROM or SCSI device boot-up.
Wake-On-LAN: Supports Wake-On–LAN activity with special network cards, such
as the ASUS PCI-L101 10/100 Fast Ethernet PCI card.
PC Health Monitoring (optional): Provides a convenient utility to monitor your
system’s vital components/activities, such as fan rotations, voltages, and temperatures.
Super Multi-I/O: Provides two high-speed UART compatible serial ports and one
parallel port with EPP and ECP capabilities. UART2 can also be directed from COM2
to the Infrared Module for wireless connections.
Desktop Management Interface (DMI): Supports DMI through BIOS, which allows hardware to communicate within a standard protocol creating a higher level of
compatibility. (Requires DMI-enabled components.) (See section V)
USB, PS/2 Mouse, IrDA Connector: Supports an optional cable and bracket set to
mount the connectors to an unused expansion slot on the system chassis. A second
IrDA connector is available for a standard individual infrared cable set.
ASUS P5A-B User’s Manual
II. FEATURES
Introduction to ASUS Smart Series Motherboards
II. FEA TURES
Smart Series
Performance
• SDRAM Optimized Performance: ASUS Smart Series motherboards support
the new generation memory—Synchronous Dynamic Random Access Memory
(SDRAM)—which increases the data transfer rate to 800MB/sec max using
PC100-compliant SDRAM.
• Double the IDE Transfer Speed: ASUS Smart Series motherboards with ALi’s
Aladdin V chipset improves IDE transfer rate using UltraDMA/33 Bus Master
IDE, which can handle data transfer up to 33MB/sec. The best of all is that this
new technology is compatible with existing ATA-2 IDE specifications so there
is no need to upgrade current hard drives or cables.
• Concurrent PCI: Concurrent PCI allows multiple PCI transfers from PCI master buses to memory to CPU.
• ACPI Ready: ACPI (Advanced Configuration and Power Interface) is also implemented on all ASUS Smart Series motherboards. ACPI provides more Energy
Saving Features for the future operating systems (OS) supporting OS Direct
Power Management (OSPM) functionality. With these features implemented in
the OS, PCs can be ready around the clock, yet satisfy all the energy saving
standards. To fully utilize the benefits of ACPI, an OS that supports ACPI, such
as Windows 98, must be used.
• PC’98 Compliant: Both the BIOS and hardware levels of the ASUS Smart
Series motherboards meet PC’98 compliancy. The new PC’98 requirements for
systems and components are based on the following high-level goals: Support
for Plug and Play compatibility and power management for configuring and
managing all system components, and 32-bit device drivers and installation procedures for Windows 95/Windows 98 and Windows NT.
Intelligence (with optional Hardware Monitor only)
• Fan Status Monitoring and Alarm: To prevent system overheat and system
damage, the CPU fan and system fans are monitored for RPM and failure. All
fans are set for its normal RPM range and alarm thresholds.
• Temperature Monitoring and Alert: To prevent system overheat and system
damage, there is a heat sensor under the CPU and on the motherboard itself to
monitor CPU and system temperature to make sure the system is operating at a
safe heat level to avoid any failures triggered by extremely high temperature.
• Chassis intrusion Detection: Supports chassis-intrusion monitoring through
LDCM and the optional ASUS CIDB chassis sensor module.
ASUS P5A-B User’s Manual
9
II. FEATURES
•
•
II. FEA TURES
P5A-B Series
•
•
•
•
•
10
Voltage Monitoring and Alert: System voltage levels are monitored to ensure
stable current to critical motherboard components. Voltage specifications are
more critical for future processors, so monitoring is necessary to ensure proper
system configuration and management.
System Resources Alert: Today’s operating systems, such as Windows 95, Windows NT, and OS/2, require much more memory and hard drive space to present
enormous user interfaces and run large applications. The system resource monitor will warn the user before the system resources are used up to prevent possible application crashes. Suggestions will give the user information on managing their limited resources more efficiently.
CPU Slow Down: When CPU fans or system fans malfunction, the system will
deactivate the CPU Clock line to decrease CPU utilization to the speed upon
detection of system overheat. This will prevent CPU damage from system overheat. The CPU utilization will restore normal operations when temperature falls
below a safe level.
Auto Fan Off: The system fans will power off automatically even in sleep
mode. This function reduces both energy consumption and system noise, and is
an important feature in implementing silent PC systems.
Dual Function Power Button (requires ATX power supply): The system can
be in one of two states, one is Sleep mode and the other is Soft-Off mode. Pushing
the power button for less than 4 seconds places the system into Sleep mode. When
the power button is pressed for more than 4 seconds, it enters the Soft-Off mode.
Remote Ring On (requires ATX power supply): This feature allows a computer
to be turned on remotely through a modem. With this benefit on hand, any user
can access vital information from their computer from anywhere in the world!
Message LED (requires ACPI-supported OS): Chassis LEDs now act as information providers. Through the way a particular LED illuminates, the user
can determine the stage the computer is in. A simple glimpse provides useful
information to the user.
ASUS P5A-B User’s Manual
II. FEATURES
Parts of the ASUS P5A-B Motherboard
3 DIMM
Sockets
ALi Aladdin V
AGPset
ATX Power
AT Connector
CPU ZIF
Socket 7
II. FEA TURES
Motherboard Parts
Serial Parallel
Ports Port
Keyboard
USB/MIR
Floppy/IDE
Connectors
512KB/1024KB
Pipelined Burst L2
Cache
Accelerated
Graphics Port
3 PCI Slots
2 ISA Slots
Programmable
Flash ROM
ASUS P5A-B User’s Manual
IrDA
C-Media 3D
Positional
Sound Chip
(optional)
11
III. INSTALLATION
Secondary IDE
VIO1
VIO0
AT Power Connector
FS3
FS2
FS1
FS0
PWR_FAN
BF2
BF1
BF0
10
32
DIMM Socket 3 (64-bit, 168-pin module)
Row
DIMM Socket 2 (64-bit, 168-pin module)
54
ATX Power Connector
DIMM Socket 1 (64-bit, 168-pin module)
CPU ZIF Socket 7
Primary IDE
III. INST ALLATION
Motherboard Layout
Floppy Drive
USB, PS/2 Mouse,
IrDA
COM 1
KB
Parallel Port
AT
Keyboard
Connector
COM 2
ASUS P5A-B Motherboard Layout
ALi
Aladdin V
AGPset
512KB/
1MB
Pipelined
Burst L2
Cache
Temp Sensor
Accelerated Graphics Port
CR2032 3V
Lithium Cell
PCI Slot 1
R
ALi
M1543
Chip
Chassis Intrusion Alarm Lead
CD1 CPU_FAN
AUX
WOLCON
SMBus Connector
PCI Slot 2
VID3
VID2
VID1
VID0
CLRTC
Audio Connectors
PCI Slot 3
1Mbit Flash EEPROM
(Programmable BIOS)
CHA_FAN
C-Media
3D Positional
Sound Chip
(optional)
ISA Slot 1
Panel Connectors
ISA Slot 2
IDELED
+
12
ASUS P5A-B User’s Manual
IR
SPDI
SPDO
TTL
III. INSTALLATION
Jumpers
1)
2)
4)
5)
6)
CLRTC
VIO
FS0, FS1, FS2, FS3
BF0, BF1, BF2
VID0, VID1, VID2, VID3
p. 15
p. 15
p. 16
p. 16
p. 18
Real Time Clock (RTC) RAM
Voltage Input/Output Selection
CPU External (BUS) Frequency Selection
CPU to BUS Frequency Ratio
Voltage Regulator Output Selection
p. 19
p. 21
p. 23
p. 23
168-Pin DIMM Memory Expansion Sockets
Central Processing Unit (CPU) Socket
16-bit ISA Bus Expansion Slots*
32-bit PCI Bus Expansion Slots
p. 25
p. 25
p. 26
p. 26
p. 27
p. 27
p. 28
p. 28
p. 29
p. 29
p. 31
p. 31
p. 31
p. 31
p. 31
p. 31
p. 31
p. 31
p. 32
p. 32
p. 33
p. 33
p. 34
p. 34
Keyboard Connector (5-pin Female)
Floppy Drive Connector (34-1 pins)
Parallel (Printer) Port Connector (26-1 pins)
Serial Port COM1 & COM2 (10-1 pins)
Power Supply, Chassis, CPU Fan Power Leads (3 pins)
Chassis Open Alarm Lead (4-1 pins)
Primary/Secondary IDE Connector (40-1 pins)
IDE LED Activity Light (2 pins)
ATX Motherboard Power Connector (20 pins)
AT Motherboard Power Connector (12 pins)
USB, Infrared, PS/2 Mouse Module Connector (18-1 pins)
IrDA-compliant Infrared Module Connector (5 pins)
System Message LED (2 pins)
ATX Power Switch/Soft Power Switch Lead (2 pins)
Reset Switch Lead (2 pins)
System Power LED Lead (3 pins)
Keyboard Lock Switch Lead (2 pins)
Speaker Output Connector (4 pins)
Wake-On-LAN Activity Connector (3 pins)
SMBus Connector (5-1 pins)
Audio Jack Connector (26 pins)
Digital Audio Interface (6 pins)
Stereo Audio In Connector (4 pins)
Stereo Audio In Connector (4 pins)
Expansion Slots
1)
2)
3)
4)
DIMM Sockets
CPU ZIF Socket 7
SLOT 1, 2
PCI 1, 2, 3
1) KB
2) FLOPPY
3) PRINTER
4) COM1, COM2
5) FAN
6) CHASIS
7) PRIMARY/SECOND. IDE
8) IDELED
9) ATX
10) PS/2
11) USB/MIR
12) IR
13) MSG.LED (PANEL)
14) PWR SW. (PANEL)
15) RESET (PANEL)
16) PWR.LED (PANEL)
17) KEYLOCK (PANEL)
18) SPEAKER (PANEL)
19) WOLCON
20) SMB
21) AUDIOCON
22) SPD0/SPD1/TTL
23) AUX
24) CD1
III. INST ALLATION
Map of Board
Connectors
*
The onboard hardware monitor uses the address 290H-297H so legacy ISA cards
must not use this address or else conflicts will occur.
ASUS P5A-B User’s Manual
13
III. INSTALLATION
Installation Steps
Before using your computer, you must complete the following steps:
1.
2.
3.
4.
5.
6.
Set Jumpers on the Motherboard
Install System Memory Modules
Install the Central Processing Unit (CPU)
Install Expansion Cards
Connect Ribbon Cables, Cabinet Wires, and Power Supply
Setup the BIOS Software
1. Jumpers
III. INST ALLATION
Jumpers
WARNING! Computer motherboards, baseboards and components, such as SCSI
cards, contain very delicate Integrated Circuit (IC) chips. To protect them against
damage from static electricity, you should follow some precautions whenever you
work on your computer.
1. Unplug your computer when working on the inside.
2. Use a grounded wrist strap before handling computer components. If you do
not have one, touch both of your hands to a safely grounded object or to a
metal object, such as the power supply case.
3. Hold components by the edges and try not to touch the IC chips, leads or
connectors, or other components.
4. Place components on a grounded antistatic pad or on the bag that came with
the component whenever the components are separated from the system.
14
ASUS P5A-B User’s Manual
III. INSTALLATION
Jumper Settings
1. Real Time Clock (RTC) RAM (CLRTC)
The CMOS RAM is powered by the onboard button cell battery. To clear the
RTC data: (1) Turn off your computer, (2) Short solder points using a small
metalic object, (3) Turn on your computer, (4) Hold down <Delete> during bootup
and enter BIOS setup to re-enter user preferences.
R
CLRTC
III. INST ALLATION
Jumpers
Short solder points
to Clear CMOS
P5A-B Clear RTC RAM
2. Voltage Input/Output Selection (VIO)
This jumper allows you to select the voltage supplied to the DRAM, chipset,
and AGP.
VIO0
VIO1
VIO0
VIO1
VIO0
VIO1
VIO0
VIO1
R
1
2
3
3.5Volts 3.6Volts 3.8Volts 4.0Volts
(DEFAULT)
P5A-B Voltage Input/Output Selection
WARNING! Using a higher voltage may help when overclocking but may result in the shortening of your computer components’ life. Use default setting.
ASUS P5A-B User’s Manual
15
III. INSTALLATION
3. CPU External (BUS) Frequency Selection (FS0, FS1, FS2, FS3)
These jumpers tell the clock generator what frequency to send to the CPU. These
allow the selection of the CPU’s External frequency (or BUS Clock). The BUS Clock
times the BUS Ratio equals the CPU's Internal frequency (the advertised CPU speed).
FS0
FS1
FS2
FS3
FS0
FS1
FS2
FS3
FS0
FS1
FS2
FS3
FS0
FS1
FS2
FS3
4. CPU to BUS Frequency Multiple (BF0, BF1, BF2)
These jumpers set the frequency ratio between the Internal frequency of the CPU
and the External frequency (called the BUS Clock) within the CPU. These must be
set in conjunction with the jumpers for CPU External (BUS) Frequency Selection.
60MHz
60MHz
30MHz
66.8MHz
66.8MHz
33.4MHz
75MHz
75MHz
37.5MHz
75MHz
60MHz
30MHz
1
2
3
CPU → 83.3MHz
AGP → 66.6MHz
PCI → 33.3MHz
95MHz
63.3MHz
31.6MHz
100MHz
66.6MHz
33.3MHz
105MHz
70MHz
35MHz
1
2
3
CPU → 110MHz
AGP → 73MHz
PCI → 36.6MHz
115MHz
77.6MHz
38.3MHz
120MHz
80MHz
40MHz
1
2
3
CPU →
AGP →
PCI →
R
III. INST ALLATION
Jumpers
BF0
BF1
BF2
BF0
BF1
BF2
BF0
BF1
BF2
AMD-K6-III, AMD-K6-2/400&faster
AMD-K6-2/380&slower, AMD-K6
Intel Pentium P54C, AMD-K5
Intel Pentium P55C, IBM/Cyrix
6x86MX, IBM/Cyrix M II
CPU E: IBM/Cyrix 6x86, IBM/Cyrix 6x86L
CPU F: IDT WinChip 2™
3.0x(3/1)
3.0x(3/1)
3.0x(3/1)
3.0x(3/1)
—
3.0x(3/1)
BF0
BF1
BF2
CPU A:
CPU B:
CPU C:
CPU D:
2.5x(5/2)
2.5x(5/2)
2.5x(5/2)
2.5x(5/2)
1.0x(1/1)
2.5x(5/2)
BF0
BF1
BF2
Match the Mult. (Multiple) column of
the table on the opposite page to these
CPU types:
1
2
3
CPU A →3.5x(7/2) 6.0x(6/1)
CPU B →3.5x(7/2) 2.0x(2/1)
CPU C →1.5x(3/2) 2.0x(2/1)
CPU D →3.5x(7/2) 2.0x(2/1)
CPU E →3.0x(3/1) 2.0x(2/1)
CPU F →3.5x(7/2) 3.33x(10/3)
BF0
BF1
BF2
P5A-B
BF0
BF1
BF2
BF0
BF1
BF2
CPU External Clock (BUS) Frequency Selection
CPU A → 4.0x(4/1)
CPU B → 4.0x(4/1)
—
CPU C →
—
CPU D →
—
CPU E →
CPU F → 4.0x(4/1)
4.5x(9/2)
4.5x(9/2)
—
—
—
4.5x(9/2)
5.0x(5/1)
5.0x(5/1)
—
—
—
2.33x(7/3)
5.5x(11/2)
5.5x(11/2)
—
—
—
2.66x(8/3)
1
2
3
CPU : BUS Frequency Multiple
WARNING! Frequencies above 100MHz exceed the specifications for the onboard chipset and are not guaranteed to be stable. The table on the following
page is for general reference purposes only. Always refer to the instructions included with your CPU when possible.
16
ASUS P5A-B User’s Manual
III. INSTALLATION
(Freq. Mult.)
BF0 BF1 BF2
CPU Model
Freq.
Mult.
AMD-K6-III/450
AMD-K6-III/400
450MHz
400MHz
A-4.5x 100MHz
A-4.0x 100MHz
[1-2] [1-2] [1-2] [2-3]
[1-2] [1-2] [1-2] [2-3]
[2-3] [2-3] [2-3]
[2-3] [1-2] [2-3]
AMD-K6-2/475
AMD-K6-2/450
AMD-K6-2/400
475MHz
450MHz
400MHz
A-5.0x 95MHz [2-3] [1-2] [1-2] [2-3]
A-4.5x 100MHz [1-2] [1-2] [1-2] [2-3]
A-4.0x 100MHz [1-2] [1-2] [1-2] [2-3]
[1-2] [2-3] [2-3]
[2-3] [2-3] [2-3]
[2-3] [1-2] [2-3]
AMD-K6-2/380
AMD-K6-2/366
AMD-K6-2/350
AMD-K6-2/333
AMD-K6-2/300
AMD-K6-2/266
380MHz
366MHz
350MHz
333MHz
300MHz
266MHz
B-4.0x
B-5.5x
B-3.5x
B-3.5x
B-3.0x
B-4.0x
95MHz
66MHz
100MHz
95MHz
100MHz
66MHz
[2-3]
[1-2]
[1-2]
[2-3]
[1-2]
[1-2]
[1-2]
[2-3]
[1-2]
[1-2]
[1-2]
[2-3]
[1-2]
[2-3]
[1-2]
[1-2]
[1-2]
[2-3]
[2-3]
[2-3]
[2-3]
[2-3]
[2-3]
[2-3]
[2-3]
[1-2]
[1-2]
[1-2]
[1-2]
[2-3]
[1-2]
[1-2]
[1-2]
[1-2]
[2-3]
[1-2]
[2-3]
[2-3]
[----]
[----]
[----]
[2-3]
AMD-K6/300
AMD-K6/266
AMD-K6/233
AMD-K6/200
AMD-K6/166
300MHz
266MHz
233MHz
200MHz
166MHz
B-4.5x
B-4.0x
B-3.5x
B-3.0x
B-2.5x
66MHz
66MHz
66MHz
66MHz
66MHz
[1-2]
[1-2]
[1-2]
[1-2]
[1-2]
[2-3]
[2-3]
[2-3]
[2-3]
[2-3]
[2-3]
[2-3]
[2-3]
[2-3]
[2-3]
[2-3]
[2-3]
[2-3]
[2-3]
[2-3]
[2-3]
[2-3]
[1-2]
[1-2]
[2-3]
[2-3]
[1-2]
[1-2]
[2-3]
[2-3]
[2-3]
[2-3]
[----]
[----]
[----]
AMD-K5/133
AMD-K5/120
AMD-K5/100
AMD-K5/90
100MHz
90MHz
100MHz
90MHz
C-1.5x
C-1.5x
C-1.5x
C-1.5x
66MHz
60MHz
66MHz
60MHz
[1-2]
[2-3]
[1-2]
[2-3]
[2-3]
[2-3]
[2-3]
[2-3]
[2-3]
[2-3]
[2-3]
[2-3]
[2-3]
[2-3]
[2-3]
[2-3]
[1-2]
[1-2]
[1-2]
[1-2]
[1-2]
[1-2]
[1-2]
[1-2]
[----]
[----]
[----]
[----]
Intel Pentium P54C
Intel Pentium P54C
Intel Pentium P54C
Intel Pentium P54C
Intel Pentium P54C
Intel Pentium P54C
166MHz
150MHz
133MHz
120MHz
100MHz
90MHz
C-2.5x
C-2.5x
C-2.0x
C-2.0x
C-1.5x
C-1.5x
66MHz
60MHz
66MHz
60MHz
66MHz
60MHz
[1-2]
[2-3]
[1-2]
[2-3]
[1-2]
[2-3]
[2-3]
[2-3]
[2-3]
[2-3]
[2-3]
[2-3]
[2-3]
[2-3]
[2-3]
[2-3]
[2-3]
[2-3]
[2-3]
[2-3]
[2-3]
[2-3]
[2-3]
[2-3]
[2-3]
[2-3]
[2-3]
[2-3]
[1-2]
[1-2]
[2-3]
[2-3]
[1-2]
[1-2]
[1-2]
[1-2]
[----]
[----]
[----]
[----]
[----]
[----]
Intel Pentium P55C
Intel Pentium P55C
Intel Pentium P55C
233MHz
200MHz
166MHz
D-3.5x 66MHz [1-2] [2-3] [2-3] [2-3]
D-3.0x 66MHz [1-2] [2-3] [2-3] [2-3]
D-2.5x 66MHz [1-2] [2-3] [2-3] [2-3]
[1-2] [1-2] [----]
[1-2] [2-3] [----]
[2-3] [2-3] [----]
IBM/Cyrix M II-PR333
IBM/Cyrix M II-PR300
IBM/Cyrix M II-PR300
333MHz
300MHz
300MHz
D-3.0x 83MHz [1-2] [2-3] [1-2] [2-3]
D-3.0x 75MHz [1-2] [1-2] [2-3] [2-3]
D-3.5x 66MHz [1-2] [2-3] [2-3] [2-3]
[1-2] [2-3] [----]
[1-2] [2-3] [----]
[1-2] [1-2] [----]
IBM/Cyrix 6x86MX-PR233 200MHz
IBM/Cyrix 6x86MX-PR200 166MHz
IBM/Cyrix 6x86MX-PR166 150MHz
D-3.0x 66MHz [1-2] [2-3] [2-3] [2-3]
D-2.5x 66MHz [1-2] [2-3] [2-3] [2-3]
D-2.5x 60MHz [2-3] [2-3] [2-3] [2-3]
[1-2] [2-3] [----]
[2-3] [2-3] [----]
[2-3] [2-3] [----]
*IBM/Cyrix 6x86-PR166+ 133MHz
*IBM/Cyrix 6x86L-PR166+ 133MHz
E-2.0x 66MHz [1-2] [2-3] [2-3] [2-3]
E-2.0x 66MHz [1-2] [2-3] [2-3] [2-3]
[2-3] [1-2] [----]
[2-3] [1-2] [----]
IDT WinChip 2™
F-4.0x 60MHz
[2-3] [1-2] [2-3]
240MHz
BUS F.
(BUS Freq.)
FS0 FS1 FS2 FS3
[2-3] [2-3] [2-3] [2-3]
III. INST ALLATION
Jumpers
Set the jumpers by the Internal speed of your CPU as follows:
*NOTE:The only IBM or Cyrix 6x86(L) (or M I) that is supported on this motherboard is revision 2.7
or later (see next page).
ASUS P5A-B User’s Manual
17
III. INSTALLATION
Compatible Cyrix CPU Identification
The only Cyrix 6x86-PR166+ CPU that is supported on this
motherboard must be Revision 2.7 or later. Look on the underside of the CPU for the serial number. The number should
read G8DC6620A or later.
5. Voltage Regulator Output Selection (VID0, 1, 2, 3)
These jumpers set the voltage supplied to the CPU. Switching regulators allow
some jumper settings to be the same for two voltages of different power planes.
WARNING! Because CPU designs change rapidly, the table below is only intended as a simple guideline and thus may not be true for your CPU. Always
refer to the CPU documentation for your CPU’s voltage and then set the appropriate VID jumpers according to the illustration below.
III. INST ALLATION
Jumpers
Manufacturer
CPU Type
AMD (.25micron) K6-III/400,450
K6-2/450,475
Single Plane
----
VID0 VID1 VID2 VID3
[1-2] [1-2] [2-3] [1-2]
2.2V(Dual)
[1-2] [2-3] [1-2] [1-2]
--------------3.2V(Dual)
2.9V(Dual)
2.9V(Dual)
2.8V(Dual)
[2-3]
[2-3]
[2-3]
[1-2]
[1-2]
[1-2]
[2-3]
[2-3]
[1-2]
VID0
VID1
VID2
VID3
VID0
VID1
VID2
VID3
[2-3]
[2-3]
[2-3]
[2-3]
[2-3]
[2-3]
[2-3]
[2-3]
[2-3]
VID0
VID1
VID2
VID3
[2-3]
[2-3]
[2-3]
[2-3]
[2-3]
[2-3]
[1-2]
[1-2]
[1-2]
VID0
VID1
VID2
VID3
[2-3]
[2-3]
[2-3]
[2-3]
[2-3]
[1-2]
[1-2]
[1-2]
[1-2]
VID0
VID1
VID2
VID3
AMD (.25micron) K6-2/266,300,333,
---350,366,380,400
K6-233,266,300
AMD
K5
3.5V(VRE)
IBM/Cyrix
6x86
3.5V(VRE)
Intel
P54C/P54CS
3.5V(VRE)
AMD
K5
3.4V(STD)
Intel
P54C/P54CS
3.4V(STD)
AMD (.35micron) K6-PR233
---AMD (.35micron) K6-166,200
---IBM/Cyrix
6x86MX
---Intel
P55C-MMX
----
Dual Plane
2.4V(Dual)
2.0Volts
2.1Volts
2.2Volts
2.3Volts
2.4Volts
2.5Volts
2.6Volts
2.7Volts
2.8Volts
2.9Volts
3.1Volts
3.2Volts
3.3Volts
3.4Volts
1
2
3
R
1
2
3
1
2
3
3.0Volts
P5A-B CPU Vcore Voltage Selection
1
2
3
3.5Volts
18
ASUS P5A-B User’s Manual
III. INSTALLATION
2. System Memory (DIMM)
This motherboard uses only Dual Inline Memory Modules (DIMMs). Sockets are
available for 3.3Volt (power level) unbuffered Synchronous Dynamic Random Access Memory (SDRAM) of either 8, 16, 32, 64, 128MB, or 256MB to form a memory
size between 8MB and 768MB. One side (with memory chips) of the DIMM takes up
one row on the motherboard.
To utilize the chipset’s Error Checking and Correction (ECC) feature, you must use a
DIMM module with 9 chips per side (standard 8 chips/side + 1 ECC chip) and make
the proper settings through “Chipset Features Setup” in BIOS setup.
Memory speed setup is recommended through SDRAM Configuration under “Chipset
Features Setup” in BIOS setup.
III. INST ALLATION
System Memory
IMPORTANT (see General DIMM Notes below)
• To make using bus speeds ≥95MHz possible, SDRAMs used must be compatible with the current Intel PC100 SDRAM specification.
Install memory in any combination as follows:
DIMM Location
168-pin DIMM
Total Memory
Socket 1 (Rows 0&1)
SDRAM 8, 16, 32, 64, 128, 256MB
x1
Socket 2 (Rows 2&3)
SDRAM 8, 16, 32, 64, 128, 256MB
x1
Socket 3 (Rows 4&5)
SDRAM 8, 16, 32, 64, 128, 256MB
x1
Total System Memory (Max 768MB) =
Notes
• DIMMs that have more than 18 chips are not supported on this motherboard.
• To make using bus speeds ≥95MHz possible, use only PC100-compliant DIMMs. Most
•
•
•
•
•
systems will not even boot if non-compliant modules are used because of the strict timing
issues involved with speeds ≥95MHz.
Two possible memory chips are supported: SDRAM with and without ECC.
ECC is not supported when using bus speeds ≥83MHz .
SDRAM chips are generally thinner and have higher pin density than EDO chips.
BIOS shows SDRAM memory on bootup screen.
8 chips/side modules do not support ECC, only 9 chips/side modules support ECC.
Single-sided DIMMs are available in 16, 32, 64, 128MB; double-sided in 32, 64, 128, 256MB.
ASUS P5A-B User’s Manual
19
III. INSTALLATION
DIMM Memory Installation Procedures:
Insert the module(s) as shown. Because the number of pins are different on either
side of the breaks, the module will only fit in the orientation as shown. DRAM
SIMM modules have the same pin contacts on both sides. SDRAM DIMMs have
different pin contacts on each side and therefore have a higher pin density.
88 Pins
R
III. INST ALLATION
System Memory
60 Pins
20 Pins
Lock
P5A-B 168-Pin DIMM Memory Sockets
The DIMMs must be 3.3Volt unbuffered SDRAMs. To determine the DIMM type,
check the notches on the DIMMs (see figure below).
168-Pin DIMM Notch Key Definitions (3.3V)
DRAM Key Position
Unbuffered
RFU
Buffered
Voltage Key Position
Reserved
5.0V
3.3V
The notches on the DIMM will shift between left, center, or right to identify the type
and also to prevent the wrong type from being inserted into the DIMM slot on the
motherboard. You must tell your retailer the correct DIMM type before purchasing.
This motherboard supports four clock signals per DIMM.
20
ASUS P5A-B User’s Manual
III. INSTALLATION
3. Central Processing Unit (CPU)
The motherboard provides a 321-pin ZIF Socket 7 that is backwards compatible
with ZIF Socket 5 processors. The CPU that came with the motherboard should
have a fan attached to it to prevent overheating. If this is not the case then purchase
a fan before you turn on your system.
WARNING! Without a fan circulating air on the CPU, the CPU can overheat
and cause damage to both the CPU and the motherboard.
III. INST ALLATION
CPU
To install a CPU, first turn off your system and remove its cover. Locate the ZIF
socket and open it by first pulling the lever sideways away from the socket then
upwards to a 90-degree right angle. Insert the CPU with the correct orientation as
shown. Use the notched corner of the CPU with the white dot as your guide. The
white dot should point towards the end the of the lever. Notice that there is a blank
area where one hole is missing from that corner of the square array of pin holes and
a “1” printed on the motherboard next to that corner. Because the CPU has a corner
pin for three of the four corners, the CPU will only fit in the one orientation as
shown. The picture is for reference only; you should have a CPU fan that will cover
the face of the CPU. With the added weight of the CPU fan, no force is required to
insert the CPU. Once completely inserted, hold down on the fan and close the socket’s
lever.
IMPORTANT: You must set jumpers for “CPU to BUS Frequency Ratio” and
jumpers for “BUS Frequency Selection” depending on the CPU that you install.
Blank
Lever
R
Lock
P5A-B ZIF Socket 7
ASUS P5A-B User’s Manual
21
(This page was intentionally left blank.)
22
ASUS P5A-B User’s Manual
III. INSTALLATION
4. Expansion Cards
WARNING! Make sure that you unplug your power supply when adding or
removing expansion cards or other system components. Failure to do so may
cause severe damage to both your motherboard and expansion cards.
Expansion Card Installation Procedure:
III. INST ALLATION
Expansion Cards
1. Read your expansion card documentation on any hardware and software settings that may be required to setup your specific card.
2. Set any necessary jumpers on your expansion card.
3. Remove your computer system’s cover.
4. Remove the bracket on the slot you intend to use.
Keep the bracket for possible future use.
5. Carefully align the card’s connectors and press firmly.
6. Secure the card on the slot with the screw you removed in step 4.
7. Replace the computer system’s cover.
8. Setup the BIOS if necessary
(such as “IRQ xx Used By ISA: Yes” in PNP AND PCI SETUP)
9. Install the necessary software drivers for your expansion card.
Assigning IRQs for Expansion Cards
Some expansion cards need to use an IRQ to operate. Generally an IRQ must be
exclusively assigned to one use. In a standard design there are 16 IRQs available
but most of them are already in use by parts of the system which leaves 6 free for
expansion cards.
Both ISA and PCI expansion cards may need to use IRQs. System IRQs are available to cards installed in the ISA expansion bus first, and any remaining IRQs are
then used by PCI cards. Currently, there are two types of ISA cards.
The original ISA expansion card design, now referred to as “Legacy” ISA cards,
requires that you configure the card’s jumpers manually and then install it in any
available slot on the ISA bus. You may use Microsoft’s Diagnostic (MSD.EXE)
utility included in the Windows directory to see a map of your used and free IRQs.
For Windows 95 users, the “Control Panel” icon in “My Computer,” contains a
“System” icon, which gives you a “Device Manager” tab. Double clicking on a
specific device give you “Resources” tab which shows the Interrupt number and
address. Make sure that no two devices use the same IRQs or your computer will
experience problems when those two devices are in use at the same time.
ASUS P5A-B User’s Manual
23
III. INSTALLATION
To simplify this process, this motherboard complies with the Plug and Play (PNP)
specification which was developed to allow automatic system configuration whenever a PNP-compliant card is added to the system. For PNP cards, IRQs are assigned automatically from those available.
If the system has both Legacy and PNP ISA cards installed, IRQs are
assigned to PNP cards from those not used by Legacy cards. The PCI and PNP
configuration of the BIOS setup utility can be used to indicate which IRQs are being
used by Legacy cards. For older Legacy cards that do not work with the BIOS, you
can contact your vendor for an ISA Configuration Utility.
An IRQ number is automatically assigned to PCI expansion cards after those used by
Legacy and PNP ISA cards. In the PCI bus design, the BIOS automatically assigns an
IRQ to a PCI slot that has a card in it that requires an IRQ. To install a PCI card, you need
to set something called the INT (interrupt) assignment. Since all the PCI slots on this
motherboard use an INTA #, be sure that the jumpers on your PCI cards are set to INT A.
III. INST ALLATION
Expansion Cards
Assigning DMA Channels for ISA Cards
Some ISA cards, both legacy and PnP, may also need to use a DMA (Direct Memory
Access) channel. DMA assignments for this motherboard are handled the same way
as the IRQ assignment process described earlier. You can select a DMA channel in
the PCI and PnP configuration section of the BIOS Setup utility.
IMPORTANT: To avoid conflicts, reserve the necessary IRQs and DMAs for legacy
ISA cards (under PNP AND PCI SETUP of the BIOS SOFTWARE, choose Yes in IRQ
xx Used By ISA and DMA x Used By ISA for those IRQs and DMAs you want to reserve).
ISA Cards and Hardware Monitor
The onboard hardware monitor uses the address 290H-297H, so legacy ISA cards
must not use this address or else conflicts will occur.
Accelerated Graphics Port
This motherboard provides an accelerated graphics port (AGP) slot to support a new
generation of graphics cards with ultra-high memory bandwidth, such as an ASUS
3D Hardware Accelerator.
NOTE: You must first install the AGP Mini Port Driver (see
support CD) to avail of the motherboard’s AGP features.
R
P5A-B Accelerated Graphics Port (AGP)
24
ASUS P5A-B User’s Manual
III. INSTALLATION
5. External Connectors
WARNING! Some pins are used for connectors or power sources. These are
clearly separated from jumpers in “Map of the ASUS Motherboard.” Placing
jumper caps over these will cause damage to your motherboard.
IMPORTANT: Ribbon cables should always be connected with the red stripe on the
Pin 1 side of the connector. The four corners of the connectors are labeled on the
motherboard. Pin 1 is the side closest to the power connector on hard drives and some
floppy drives. IDE ribbon cable must be less than 18in. (46cm), with the second drive
connector no more than 6in. (15cm) from the first connector.
III. INST ALLATION
Connectors
1. Keyboard Connector (KB, 5-pin female)
This connector supports either a standard IBM-compatible, 101/102-key, or 104key keyboard (Windows 95-compatible).
Keyboard Connector (5-pin female)
R
This motherboard accepts an AT Keyboard
Connector Plug as shown here.
P5A-B Keyboard Connector
2. Floppy drive connector (FLOPPY, 34-1 pin block )
This connector supports the provided floppy drive ribbon cable. After connecting the single end to the board, connect the two plugs on the other end to the
floppy drives. (Pin 5 is removed to prevent inserting in the wrong orientation when using ribbon cables with pin 5 plugged).
Pin 1
Orient the red stripe on your cable to Pin 1
R
P5A-B Floppy Disk Drive Connector
ASUS P5A-B User’s Manual
25
III. INSTALLATION
3. Parallel Connector (PARALLEL, 26-1 pin block)
This connector supports the included parallel port ribbon cable with mounting
bracket. Connect the ribbon cable to this connection and mount the bracket to
the case on an open slot. A PS/2 mouse connector is included for the USB/
Mouse/IR onboard connector if the optional USB/MIR connector is not used.
You can make available the parallel port and choose the IRQ through the Onboard
Parallel Port in Chipset Features of the BIOS SOFTWARE. (Pin 26 is removed to prevent inserting in the wrong orientation when using ribbon cables
with pin 26 plugged).
NOTE: Serial printers must be connected to the serial port.
Orient the red stripe on your cable to Pin 1
Pin 1
R
III. INST ALLATION
Connectors
For this connector to be available, you must connect
the included parallel (25-pin female) cable set to a
free expansion slot opening.
TIP: You may also remove the bracket connectors and
mount them directly to the case to save expansion slot
space.
P5A-B Parallel Port Connector
4. Serial Port Connectors (COM1/COM2, two 10-1 pin blocks)
These connectors support the provided serial port ribbon cables with mounting
bracket. Connect the ribbon cables to these connectors and mount the bracket to
the case on an open slot. You can make available the parallel port and choose the
IRQ through the Onboard Serial Port in Chipset Features of the BIOS SOFTWARE. (Pin 10 is removed to prevent inserting in the wrong orientation
when using ribbon cables with pin 10 plugged).
COM 1
Pin 1
COM 2
R
Pin 1
For these connectors to be available, you
must connect the included Serial cable set
from COM1 (using the 9-Pin male) & COM2
(using the 25-Pin male) to a free expansion
slot opening.
TIP: You may also remove the bracket
connectors and mount them directly to the
case to save expansion slot space.
P5A-B Onboard Serial Port Connectors
26
ASUS P5A-B User’s Manual
III. INSTALLATION
5. CPU Cooling Fan Connectors (FAN, 3 pins)
This connector supports a 3-pin CPU cooling fan of 500mA (6W) or less with a
minimum of 3,500RPM. Depending on the fan manufacturer, the wiring and
plug may be different. The red wire should be Positive, the black should be
Ground, and the yellow wire should be Rotation signal.
WARNING! The CPU and/or motherboard will overheat if there is no airflow
across the CPU. Damage may occur to the motherboard and/or the CPU fan if
these pins are incorrectly used. These are not jumpers, do not place jumper
caps over these pins.
Power Supply Fan
Ground
+12 Volt
Rotation
R
Rotation
+12 Volt
Ground
III. INST ALLATION
Connectors
Chassis Fan Power
CPU Fan Power
P5A-B Power Supply, CPU, Chassis Fan Power
6. Chassis Intrusion Alarm Lead (4-1 pin CHASIS)
This lead is for a chassis intrusion monitor or sensor. The sensor is triggered
when a high level signal is sent to the chassis signal lead. This occurs when a
panel switch or light detector is triggered. This function requires the optional
ASUS CIDB Chassis Sensor to be installed (see VI. ASUS CIDB).
NOTE: When the chassis is opened, connect/short the Chassis Signal pin to the
+5VSB pin. When the chassis is closed, connect/short the Chassis Signal pin to
the Ground pin.
R
+5Volt (Power Supply Stand By)
Chassis Signal
Ground
P5A-B Chassis Open Alarm Lead
ASUS P5A-B User’s Manual
27
III. INSTALLATION
7. Primary / Secondary IDE connectors (Two 40-1 pin block)
These connectors support the provided IDE hard disk ribbon cable. After connecting the single end to the board, connect the two plugs at the other end to
your hard disk(s). If you install two hard disks on the same channel, you must
set the second drive to Slave mode. Refer to the documentation of your hard
disk for the jumper settings. BIOS now supports SCSI device or IDE CD-ROM
bootup (see HDD Sequence SCSI/IDE First & Boot Sequence in the BIOS Features Setup of the BIOS SOFTWARE) (Pin 20 is removed to prevent inserting in the wrong orientation when using ribbon cables with pin 20 plugged).
Secondary IDE Connector
Pin 1
Primary IDE Connector
R
III. INST ALLATION
Connectors
NOTE: Orient the red stripe on your
cable to Pin 1
P5A-B IDE Connectors
TIP: You may configure two hard disks to be both Masters using one ribbon
cable on the primary IDE connector and another ribbon cable on the secondary
IDE connector. You may install one operating system on an IDE drive and
another on a SCSI drive and select the boot disk through BIOS Features Setup.
8. IDE activity LED (IDELED, 2 pins)
This connector supplies power to the cabinet’s IDE activity LED. Read and
write activity by devices connected to the Primary or Secondary IDE connectors
will cause the LED to light up.
R
TIP: If the case-mounted LED does not light,
try reversing the 2-pin plug.
IDELED
+
P5A-B IDE Activity LED
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ASUS P5A-B User’s Manual
III. INSTALLATION
9. ATX Power Supply Connector (ATX, 20-pin block)
This connector connects to an ATX power supply. The plug from the power supply will only insert in one orientation because of the different hole sizes. Find the
proper orientation and push down firmly making sure that the pins are aligned.
IMPORTANT: Make sure that your ATX power supply can supply at least
10mAmp on the 5-volt standby lead (+5VSB). You may experience difficulty in
powering on your system if your power supply cannot support the load. For
Wake on LAN support, your ATX power supply must supply at least 720mA.
+5.0 Volts
+5.0 Volts
-5.0 Volts
Ground
Ground
Ground
Power Supply On
Ground
-12.0 Volts
+3.3 Volts
III. INST ALLATION
Connectors
R
+12.0 Volts
+5V Standby
Power Good
Ground
+5.0 Volts
Ground
+5.0 Volts
Ground
+3.3 Volts
+3.3 Volts
P5A-B ATX Power Connector
10. AT Power Supply Connector (PS/2, 12-pin block)
This connector connects to a standard 5 Volt power supply. To connect the leads
from the power supply, ensure first that the power supply is not plugged. Most
power supplies provide two plugs (P8 and P9), each containing six wires, two of
which are black. Orient the connectors so that the black wires are together.
PG
+12V
+5V
-12V
P8
GND
R
-5V
P9
+5V
Power Connector
on Motherboard
ORG
RED
YLW
BLU
BLK
BLK
BLK
BLK
WHT
RED
RED
RED
Power Plugs from
Power Supply
P5A-B AT Power Connector
At a slight angle, align the plastic guide pins on the lead to their receptacles on
the connector. Once aligned, press the lead onto the connector until the lead
locks into place.
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29
III. INSTALLATION
11. USB, Infrared, PS/2 Mouse Module Connector (USB/MIR, 18-1 pin block)
If you want to use PS/2 mouse, USB, or infrared (IrDA) devices, you need to
purchase an external connector set. The external connector set connects to the
18-pin block and mounts to an open slot on your computer’s chassis. The system
will direct IRQ12 to the PS/2 mouse if one is detected. If not detected, expansion cards can use IRQ12. See PS/2 Mouse Control in BIOS Features Setup
and USB Function in PnP and PCI Setup of the BIOS SOFTWARE. See Second IrDA... connector for details on the infrared connector.
1
9
10
18
III. INST ALLATION
Connectors
1: USB +5 Volt
2: USB Port 0 3: USB Port 0 +
4: Ground
5: (no connection)
6: PS/2 Mouse Clock
7: Ground
8: (no connection)
9: +5 Volt
Infrared
PS/2
Mouse
10: USB +5 Volt
11: USB Port 1 12: USB Port 1 +
13: Ground
14: (no connection)
15: PS/2 Mouse Data
16: Ground
17: Infrared Receive
18: Infrared Transmit
USB 0
USB 1
Optional USB/MIR
P5A-B PS/2 USB, Mouse, IrDA Module Connector
12. IrDA-Compliant Infrared Module Connector (IR, 5-pin block)
This connector supports the optional wireless transmitting and receiving infrared module. This module mounts to a small opening on system cases that support this feature. You must also configure the setting through UART2 Use Infrared in Chipset Features Setup to select whether UART2 is directed for use
with COM2 or IrDA. Use the five pins as shown below (Back View) and connect a ribbon cable from the module to the motherboard according to the pin
definitions.
Front View
FIRRX
GND
Back View
+5V
IRRX
IRTX
R
+5V
IRTX
GND
FIRRX
IRRX
For the infrared feature to be available,
you must connect an optional Infrared
module to the motherboard.
P5A-B Infrared Module Connector
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ASUS P5A-B User’s Manual
III. INSTALLATION
III. INST ALLATION
Connectors
13. Message LED Lead (MSG.LED, 2 pins)
This indicates whether a message has been received from a fax/modem. The
LED will remain lit when there is no signal and blink when there is data transfer
or messages waiting in the inbox. This function requires ACPI OS support.
14. ATX Power Switch/Soft Power Switch Lead (PWR.SW., 2 pins)
The system power can be controlled by a momentary switch connected to this
lead. Pushing the button once will switch the system between ON and SLEEP.
Pushing the switch while in the ON mode for more than 4 seconds will turn the
system off. The system power LED shows the status of the system’s power.
15. Reset Switch Lead (RESET, 2 pins)
This 2-pin connector connects to the case-mounted reset switch for rebooting
your computer without having to turn off your power switch This is a preferred
method of rebooting in order to prolong the life of the system’s power supply.
16. System Power LED Lead (PWR.LED, 3 pins)
This 3-pin connector connects the system power LED, which lights when the
system is powered on and blinks when it is in sleep mode.
17. Keyboard Lock Switch Lead (KEYLOCK, 2 pins)
This 2-pin connector connects to the case-mounted key switch to allow keyboard locking.
18. Speaker Connector (SPEAKER, 4 pins)
This 4-pin connector connects to the case-mounted speaker.
Message
LED
+5V
GND
R
ATX Power
Switch
Reset SW
GND
GND
+5V
NC
GND
LOCK
GND
+5V
GND
GND
SPKR
System
Power LED
Keyboard Lock
Speaker
Connector
*Requires an ATX power supply, optional ATX to
AT power connector adapter, and a momentary
switch button.
P5A-B System Panel Connectors
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31
III. INSTALLATION
19. Wake-On-LAN Activity Connector (3-pin WOLCON)
The WOLCON connector allows the system to power up when there is a wakeup
packet or signal is received from the network through the ASUS PCI-L101 LAN
card (see section VI. ASUS LAN CARD).
IMPORTANT: This feature requires that the WAKE On LAN Power Up Control is
set to Enabled (see “Power Management Setup” under IV. BIOS SOFTWARE) and
that your system has an ATX power supply with at least 720mA +5V standby power.
R
+5V Standby
Ground
PME
III. INST ALLATION
Connectors
P5A-B Wake-On-LAN Connector
20. SMBus Connector (5-1 pin SMB)
This connector allows you to connect SMBus devices. SMBus devices communicate by means of the SMBus with an SMBus host and/or other SMBus devices. The SMBus or System Management Bus is a specific implementation of
an I2C bus, which is a multi-master bus, that is, multiple chips can be connected
to the same bus and each one can act as a master by initiating data transfer.
R
SMBCLK
Ground
SMBDATA
+5V
P5A-B SMBus Connector
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III. INSTALLATION
21. Audio Jack Connector (26-pin AUDIOCON)
This connector is provided for audio input and output signals. Using a ribbon
cable, you can connect this connector to a back panel audio connector.
Audio connector
1
2
R
Game/MIDI Port (15 pins)
2 1
Red marking
along edge
Line Output (1/8” phono)
Microphone In (1/8” phono)
Line Input (1/8” phono)
25
26
P5A-B Audio Jack Connector
III. INST ALLATION
Connectors
WARNING! Make sure that PIN 1 on the cable (use the red marking along the
cable’s edge as reference) is connected to PIN 1 on the audio connector module;
otherwise, damage will occur.
22. Digital Audio Interface (6-pin SPD0/SPD1/TTL)
This connector is the digital link between the motherboard and your devices,
such as CD player, sampler, or DAT recorder. It allows the digital transmission
of audio data in SPDIF (Sony/Philips Digital Interface) Format.
R
TTL: Short this, if output device is TTL level
SPDIFO: Digital Signal OUT
SPDIFI: Digital Signal IN
P5A-B Digital Audio Interface
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33
III. INSTALLATION
23. Stereo Audio In Connector (4-pin AUX)
This connector allows you to receive stereo audio input from such sound sources
as a TV tuner or MPEG card.
R
AUX
Left Audio Channel
Ground
Ground
Right Audio Channel
P5A-B Stereo Audio In Connector
R
III. INST ALLATION
Connectors
24. Stereo Audio In Connector (4-pin CD1)
This connector allows you to receive stereo audio input from an internal
CD-ROM drive.
Left Audio Channel
Ground
Ground
Right Audio Channel
CD1
P5A-B Stereo Audio In Connector
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ASUS P5A-B User’s Manual
III. INSTALLATION
Power Connection Procedures
1. After all jumpers and connections are made, close the system case cover.
2. Be sure that all switches are off (in some systems, marked with ).
3. Connect the power supply cord into the power supply located on the back of
your system case according to your system user’s manual.
4. Connect the power cord into a power outlet that is equipped with a surge protector.
III. INST ALLATION
Power Connections
5. You may then turn on your devices in the following order:
a. Your monitor
b. External SCSI devices (starting with the last device on the chain)
c. Your system power. For ATX power supplies, you need to switch
on the power supply as well as press the ATX power switch on the
front of the case.
6. The power LED on the front panel of the system case will light. For ATX power
supplies, the system LED will light when the ATX power switch is pressed. The
LED on the monitor may light up or switch between orange and green after the
system’s if it complies with “green” standards or if it has a power standby feature. The system will then run power-on tests. While the tests are running, additional messages will appear on the screen. If you do not see anything within 30
seconds from the time you turn on the power, the system may have failed a
power-on test. Recheck your jumper settings and connections or call your retailer for assistance.
7. During power-on, hold down <Delete> to enter BIOS setup. Follow the instructions in the next section, BIOS SOFTWARE.
*Powering Off your computer: You must first exit or shut down your operating system before switching off the power switch. For ATX power supplies, you
can press the ATX power switch after exiting or shutting down your operating
system. If you use Windows 95, click the Start button, click Shut Down, and
then click Shut down the computer?. The power supply should turn off after
Windows shuts down.
NOTE: The message “You can now safely turn off your computer” will not
appear when shutting down with ATX power supplies.
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35
IV. BIOS SOFTWARE
Flash Memory Writer Utility
AFLASH.EXE: This is the Flash Memory Writer utility that updates the BIOS by uploading
a new BIOS file to the programmable flash ROM chip on the motherboard. To determine the
BIOS version of your motherboard, check the last four numbers of the code displayed on the
upper left-hand corner of your screen during bootup. Larger numbers represent a newer BIOS
file. This file works only in DOS mode.
NOTE: The following screen displays are provided as examples only and may not reflect the
screen contents displayed on your system.
IV. BIOS
Flash Memory Writer
IMPORTANT! If “unknown” is displayed after Flash Memory:, the memory chip is
either not programmable or is not supported by the ACPI BIOS and therefore, cannot be
programmed by the Flash Memory Writer utility.
Main Menu
1. Save Current BIOS To File
This option allows you to save a
copy of the original motherboard
BIOS in case you need to reinstall
it. It is recommended that you save
AFLASH.EXE and the BIOS file
to a bootable floppy disk.
To save your current BIOS, type
[1] at the Main Menu and then
press <Enter>. The Save Current
BIOS To File screen appears.
Type a filename and the path, for example, A:\440BX-1 and then press <Enter>.
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ASUS P5A-B User’s Manual
IV. BIOS SOFTWARE
2. Update BIOS Including Boot Block and ESCD
This option updates the boot block, the baseboard BIOS, and the ACPI extended system configuration data (ESCD) parameter block from a new BIOS file. See the next page for procedures on downloading an updated BIOS file.
To update your current BIOS,
type 2 at the Main Menu and
then press <Enter>. The Update
BIOS Including Boot Block
and ESCD screen appears. Type
the filename of your new BIOS
and the path, for example,
A:\BX2I1002.AWD, and then
press <Enter>.
IV. BIOS
Flash Memory Writer
When prompted to confirm the
BIOS update, press Y to start the
update.
The utility starts to program the
new BIOS information into the
flash ROM. When the programming is finished, Flashed Successfully will be displayed.
Follow the onscreen instructions
to continue.
ASUS P5A-B User’s Manual
37
IV. BIOS SOFTWARE
Managing and Updating Your Motherboard’s BIOS
Upon First Use of the Computer System
1. Create a bootable system floppy disk by typing [FORMAT A:/S] from the DOS
prompt without creating “AUTOEXEC.BAT” and “CONFIG.SYS” files.
2. Copy AFLASH.EXE to the just created boot disk.
3. Run AFLASH.EXE from this new disk and select option 1. Save Current BIOS
to File. See 1. Save Current BIOS To File on the previous page for more details and the rest of the steps.
Updating BIOS Procedures (only when necessary)
1. Download an updated ASUS BIOS file from the Internet (WWW or FTP) or a
BBS (Bulletin Board Service) (see ASUS CONTACT INFORMATION on page
3 for details) and save to the disk you created earlier.
2. Boot from the disk you created earlier.
3. At the “A:\” prompt, type AFLASH and then press <Enter>.
4. At the Main Menu, type 2 and then press <Enter>. See 2. Update BIOS Including Boot Block and ESCD on the previous page for more details and the
rest of the steps.
IV. BIOS
Flash Memory Writer
WARNING! If you encounter problems while updating the new BIOS, DO NOT
turn off your system since this might prevent your system from booting up. Just
repeat the process, and if the problem still persists, update the original BIOS file
you saved to disk above. If the Flash Memory Writer utility was not able to
successfully update a complete BIOS file, your system may not be able to boot
up. If this happens, your system will need service.
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ASUS P5A-B User’s Manual
IV. BIOS SOFTWARE
6. BIOS Setup
The motherboard supports two programmable Flash ROM chips: 5 volt and 12 volt.
Either of these memory chips can be updated when BIOS upgrades are released.
Use the Flash Memory Writer utility to download the new BIOS file into the ROM
chip as described in detail in this section.
All computer motherboards provide a Setup utility program for specifying the system configuration and settings. If your motherboard came in a computer system, the
proper configuration entries may have already been made. If so, invoke the Setup
utility, as described later, and take note of the configuration settings for future reference; in particular, the hard disk specifications.
If you are installing the motherboard, reconfiguring your system or you receive a
Run Setup message, you will need to enter new setup information. This section
describes how to configure your system using this utility.
IV. BIOS
BIOS Setup
The BIOS ROM of the system stores the Setup utility. When you turn on the computer, the system provides you with the opportunity to run this program. This appears during the Power-On Self Test (POST). Press <Delete> to call up the Setup
utility. If you are a little bit late pressing the mentioned key(s), POST will continue
with its test routines, thus preventing you from calling up Setup. If you still need to
call Setup, reset the system by pressing <Ctrl> + <Alt> + <Delete>, or by pressing
the Reset button on the system case. You can also restart by turning the system off
and then back on again. But do so only if the first two methods fail.
When you invoke Setup, the CMOS SETUP UTILITY main program screen will
appear with the following options:
ASUS P5A-B User’s Manual
39
IV. BIOS SOFTWARE
Load Defaults
Load BIOS Defaults loads the minimum settings for troubleshooting. Load Setup
Defaults, on the other hand, is for loading optimized defaults for regular use. Choosing defaults at this level will modify all applicable settings.
A section at the bottom of the preceding screen displays the control keys for this
screen. Take note of these keys and their respective uses.
Standard CMOS Setup
Standard CMOS Setup allows you to record some basic system hardware configuration and set the system clock and error handling. If the motherboard is already
installed in a working system, you will not need to select this option anymore. However, if the configuration stored in the CMOS memory on the board gets lost or
damaged, or if you change your system hardware configuration, you will need to
respecify the configuration values. The configuration values usually get lost or
corrupted when the power of the onboard CMOS battery weakens.
IV. BIOS
Standard CMOS
The preceding screen provides you with a list of options. At the bottom of this screen
are the control keys. Take note of these keys and their respective uses.
User-configurable fields appear in a different color. If you need information on the
selected field, press <F1>. The help menu will then appear to provide you with the
information you need. The memory display at the lower right of the screen is readonly and automatically adjusts accordingly.
Details of Standard CMOS Setup
Date
To set the date, highlight the “Date” field and then press either <Page Up>/<Page Down>
or <+>/<–> to set the current date. Follow the month, day and year format. Valid values
for month, day and year are: Month: (1 to 12), Day: (1 to 31), Year: (up to 2079)
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ASUS P5A-B User’s Manual
IV. BIOS SOFTWARE
Time
To set the time, highlight the “Time” field and then press either <Page Up>/<Page Down>
or <+>/<–> to set the current time. Follow the hour, minute and second format. Valid
values for hour, minute and second are: (Hour: (00 to 23), Minute: (00 to 59), Second:
(00 to 59). If you do not want to modify the current time, press <Enter> three times
to go to HARD DISKS.
NOTE: You can bypass the date and time prompts by creating an AUTOEXEC.BAT
file. For information on how to create this file, refer to the MS-DOS manual.
Hard Disk Drives
This field records the specifications for all non-SCSI hard disk drives installed in
your system. The onboard PCI IDE connectors provide Primary and Secondary
channels for connecting up to four IDE hard disks or other IDE devices. Each channel can support up to two hard disks; the first of which is the “master” and the
second is the “slave”.
Specifications for SCSI hard disks need not to be entered here since they operate
using device drivers and are not supported by any BIOS. If you install a SCSI controller card, refer to its documentation on how to install the required SCSI drivers.
IV. BIOS
Standard CMOS
For IDE hard disk drive setup, you can:
• Use the Auto setting for detection during bootup.
• Use the IDE HDD AUTO DETECTION in the main menu to automatically
enter the drive specifications.
• Enter the specifications yourself manually by using the “User” option.
The entries for specifying the hard disk type include CYLS (number of cylinders),
HEAD (number of read/write heads), PRECOMP (write precompensation), LANDZ
(landing zone), SECTOR (number of sectors) and MODE. The SIZE field automatically adjusts according to the configuration you specify. The documentation
that comes with your hard disk should provide you with the information regarding
the drive specifications.
The MODE entry is for IDE hard disks only, and can be ignored for MFM and ESDI
drives. This entry provides three options: Normal, Large, LBA, or Auto (see below). Set MODE to the Normal for IDE hard disk drives smaller than 528MB; set
it to LBA for drives over 528MB that support Logical Block Addressing (LBA) to
allow larger IDE hard disks; set it to Large for drives over 528MB that do not support LBA. Large type of drive can only be used with MS-DOS and is very uncommon. Most IDE drives over 528MB support the LBA mode.
ASUS P5A-B User’s Manual
41
IV. BIOS SOFTWARE
Auto detection of hard disks on bootup
For each field: Primary Master, Primary Slave, Secondary Master, and Secondary
Slave, you can select Auto under the TYPE and MODE fields. This will enable auto
detection of your IDE hard disk during bootup. This will allow you to change your
hard disks (with the power off) and then power on without having to reconfigure
your hard disk type. If you use older hard disks that do not support this feature, then
you must configure the hard disk in the standard method as described earlier by the
“User” option.
NOTE: After the IDE hard disk drive information has been entered into BIOS, new
IDE hard disk drives must be partitioned (such as with FDISK) and then formatted
before data can be read from and write on. Primary IDE hard disk drives must have
its partition set to active (also possible with FDISK).
NOTE: SETUP Defaults are noted in parenthesis next to each function heading.
Drive A / Drive B (None)
These fields record the types of floppy disk drives installed in your system. The
available options for drives A and B are: 360K , 5.25 in.; 1.2M , 5.25 in.; 720K , 3.5
in.; 1.44M , 3.5 in.; 2.88M , 3.5 in.; None
IV. BIOS
Standard CMOS
To enter the configuration value for a particular drive, highlight its corresponding
field and then select the drive type using the <page up>/<page down> or <+>/<->
keys.
Floppy 3 Mode Support (Disabled)
This is the Japanese standard floppy drive. The standard stores 1.2MB in a 3.5inch
diskette. This is normally disabled but you may choose from either: Drive A, Drive
B, Both, and Disabled
Video (EGA/VGA)
Set this field to the type of video display card installed in your system. The options
are EGA/VGA, CGA 40, CGA 80, and MONO (for Hercules or MDA).
If you are using a VGA or any higher resolution card, choose EGA/VGA.
Halt On (All Errors)
This field determines which types of errors will cause the system to halt. Choose from
All Errors; No Errors; All,But Keyboard; All,But Diskette; and All,But Disk/Key.
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ASUS P5A-B User’s Manual
IV. BIOS SOFTWARE
BIOS Features Setup
BIOS Features Setup consists of configuration entries that allow you to improve
your system performance, or let you set up some system features according to your
preference. Some entries are required by the motherboard’s design to remain in
their default settings.
IV. BIOS
BIOS Features
A section at the lower right of the screen displays the control keys you can use. Take
note of these keys and their respective uses. If you need information on a particular
entry, highlight it and then press <F1>. A pop-up help menu will appear to provide
you with the information you need. <F5> loads the last set values, <F6> and <F7>
loads the BIOS default values and Setup default values, respectively.
NOTE: SETUP Defaults are enclosed in parentheses next to each function heading.
Details of BIOS Features Setup
Boot Virus Detection (Enabled)
This field allows you to set boot virus detection, ensuring a virus-free boot sector.
This new antivirus solution is unlike native BIOS tools, which offer limited virus
protection typically by write-protecting the partition table. With this new solution,
your computer is protected against boot virus threats earlier in the boot cycle, that is,
before they have a chance to load into your system. This ensures your computer
boots to a clean operating system. The system halts and displays a warning message
when it detects a virus. If this occurs, you can either allow the operation to continue
or use a virus-free bootable floppy disk to restart and investigate your system. Because of conflicts with new operating systems, for example, during installation of
new software, you may have to set this to Disabled to prevent write errors.
CPU Internal Cache (Enabled)
Choose Disable to turn off the CPU’s built-in level 1 cache.
External Cache (Enabled)
Choose Disable to turn off the CPU’s external level 2 cache.
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43
IV. BIOS SOFTWARE
IV. BIOS
BIOS Features
Quick Power On Self Test (Enabled)
This field speeds up the Power-On Self Test (POST) routine by skipping retesting a
second, third, and forth time. Setup default setting for this field is Enabled. A complete test of the system is done on each test.
HDD Sequence SCSI/IDE First (IDE)
When using both SCSI and IDE hard disk drives, IDE is always the boot disk using
drive letter C (d--efault setting of IDE). This new feature allows a SCSI hard disk
drive to be the boot disk when set to SCSI. This allows multiple operating systems to
be used on both IDE and SCSI drives or the primary operating system to boot using
a SCSI hard disk drive.
Boot Sequence (A,C)
This field determines where the system looks first for an operating system. Options are
A,C; A,CDROM,C; CDROM,C,A; CDROM,A,C; D,A; E,A; F,A; C only; LS/ZIP, C;
LAN,A,C; LAN,C,A; and C,A. The default setting is to check first the floppy disk and
then the hard disk drive.
Boot Up Floppy Seek (Disabled)
When enabled, the BIOS will seek drive A one time.
Floppy Disk Access Control (R/W)
This allows protection of files from the computer system to be copied to floppy disk
drives by allowing the setting of Read Only to only allow reads from the floppy disk
drive but not writes. The setup default R/W allows both reads and writes.
IDE HDD Block Mode Sectors (HDD MAX)
This field enhances hard disk performance by making multi-sector transfers instead
of one sector per transfer. Most IDE drives, except older versions, can utilize this
feature. Selections are HDD MAX, Disabled, 2, 4, 8, 16, and 32.
HDD S.M.A.R.T. capability (Disabled)
This field enables or disables S.M.A.R.T. (Self-Monitoring Analysis and Reporting
Technology) support for S.M.A.R.T.-capable hard disk drives. This technology requires an application that can display S.M.A.R.T. warning messages.
PS/2 Mouse Function Control (Auto)
The setting of Auto allows the system to detect a PS/2 Mouse on bootup. If detected,
IRQ12 will be used for the PS/2 Mouse. If not detected, IRQ12 will be reserved for
expansion cards. Enabled will reserve IRQ12 for the PS/2 Mouse.
OS/2 Onboard Memory > 64M (Disabled)
When using OS/2 operating systems with installed DRAM of greater than 64MB,
you need to Enable this option otherwise leave this on the setup default of Disabled.
......................................................................................................................................
PCI/VGA Palette Snoop (Disabled)
Some display cards that are nonstandard VGA, such as graphic accelerators or MPEG
video cards may not show colors properly. Setting this to Enabled should correct
this problem. Otherwise, leave this on the default setting of Disabled.
Video ROM BIOS Shadow (Enabled)
This field allows you to change the video BIOS location from ROM to RAM. Relocating to RAM enhances system performance, as information access is faster than the ROM.
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ASUS P5A-B User’s Manual
IV. BIOS SOFTWARE
IV. BIOS
BIOS/Chipset Features
C8000 - CBFFF Shadow to DC000 - DFFFF Shadow (Disabled)
These fields are used for shadowing other expansion card ROMs. If you install other
expansion cards with ROMs on them, you will need to know which addresses the
ROMs use to shadow them specifically. Shadowing a ROM reduces the memory
available between 640KB and 1024KB by the amount used for this purpose.
Boot Up NumLock Status (On)
This field enables users to activate the Number Lock function upon system boot.
Typematic Rate Setting (Disabled)
When enabled, you can set the Typematic Rate and Delay.
Typematic Rate (Chars/Sec) (6)
This field controls the speed at which the system registers repeated keystrokes. Options range from 6 to 30 characters per second. Setup default setting is 6; other
settings are 8, 10, 12, 15, 20, 24, and 30.
Typematic Delay (Msec) (250)
This field sets the time interval for displaying the first and second characters. Four
delay rate options are available: 250, 500, 750, and 1000.
Security Option (System)
When you specify a Supervisor Password and/or User Password (explained later in
this section), Security Option determines when the system prompts for the password. The default setting is System, where the system prompts for the User Password every time you start your system. The other option is Setup, where the system
goes through its startup routine unless the Setup utility is called, when the system
prompts for the Supervisor Password.
Chipset Features Setup
Chipset Features Setup controls the configuration of the board’s chipset. Control
keys for this screen are the same as in the BIOS Features Setup screen.
NOTE: SETUP defaults are enclosed in parentheses next to each function heading.
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IV. BIOS SOFTWARE
Details of Chipset Features Setup
Chipset Features
SDRAM Configuration (By SPD)
This sets the optimal timing for items 2-4. Leave on default setting, depending on
the memory modules that you are using. Default setting is By SPD, which configures items 2-4 by reading the contents in the SPD (Serial Presence Detect) device.
This 8-pin serial EEPROM device stores critical parameter information about the
module, such as memory type, size, speed, voltage interface, and module banks.
SDRAM CAS Latency
This controls the latency between SDRAM read command and the time that the
data actually becomes available. Leave on default setting.
SDRAM RAS to CAS Delay
This controls the latency between SDRAM active command and the read/write
command. Leave on default setting.
SDRAM RAS Precharge Time
This controls the idle clocks after issuing a precharge command to SDRAM.
Leave on default setting.
Enhanced Page Mode Count (Disabled) / Internal Page Detection (Disabled)
Leave on default setting.
SDRAM Pipe Function (Disabled) / SDRAM x111-2111 Mode (Enabled)
Leave on default setting.
I/O Recovery Time (2 BUSCLK)
Timing for ISA cards. Leave on default setting.
Graphics Aperture Size (64MB)
Memory-mapped, graphics data structures can reside in a Graphics Aperture. Leave
on default setting.
Frame Buffer Posted Write (Enabled)
Enabling (default) this feature will enhance AGP to memory performance. Leave on
default setting.
Force PCI_66 GAT Mode (Enabled)
Enabling this feature will flush the internal PCI/66 buffer before data transfer. Setting this to Disabled may cause some AGP card stability problems.
AGP Bus Turbo Mode (Enabled)
Enabling (default) this feature will improve AGP Bus performance. Disable this for
AGP compatibility. Leave on default setting.
Passive Release (Enabled)
This is a mechanism that allows concurrency of CPU-to-ISA cycles. When this feature is enabled, it will be possible to re-arbitrate the PCI bus and allow the CPU to
access PCI even when the M1543C has been granted the ISA bus.
Delayed Transaction (Disabled)
If Enabled, this frees the PCI Bus during CPU accessing of 8-bit ISA cards which
normally consume about 50-60 PCI Clocks without PCI delayed transaction. If PCI
Bus Masters cannot use the PCI Bus, leave this on the default setting of Disabled for
some ISA cards that are not PCI 2.1 compliant.
IV. BIOS
Chipset Features
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IV. BIOS SOFTWARE
ASUS P5A-B User’s Manual
IV. BIOS
Chipset Features
IV. BIOS
Chipset Features
Memory Hole At 15M-16M (Disabled)
Enabling this feature reserves 15MB-16MB memory address space to ISA expansion cards
that specifically require this setting. This makes the memory from 15MB and up unavailable
to the system. Expansion cards can only access memory up to 16MB. The default is Disabled.
Data Integrity Mode (Disabled)
Data Integrity Mode or ECC is always Disabled when bus speeds ≥83MHz or when
bus speed is equal to 75MHz and PCI clock is equal to the bus clock/2. When this
field is Disabled, byte-wise write capability is available but no provision for protecting data integrity in the memory module array is available; although data errors are
detected, they are not corrected. When Enabled, ECC is available, allowing a detection of single-bit and multiple-bit errors and recovery of single-bit errors. [See 2.
System Memory (DIMM), section III for more information on memory modules.]
KBD Clock Source Speed (8MHz)
This field allows you to set the internal keyboard clock line speed. Set to either 12MHz
or 16MHz if the default setting of 8MHz does not work with your operating system.
Onboard FDC Controller (Enabled)
When enabled, this field allows you to connect your floppy disk drives to the onboard
floppy drive connector instead of a separate controller card. If you want to use a different controller card to connect the floppy disk drives, set this field to Disabled.
Onboard FDC Swap A & B (No Swap)
This field allows you to reverse the hardware drive letter assignments of your floppy
disk drives. Two options are available: Swap AB and No Swap (default). If you want
to switch drive letter assignments, set this field to Swap AB, and the swap will be
controlled by the onboard chipset.
....................................................................................................................................
Onboard Serial Port 1 (3F8H/IRQ4)
Settings are 3F8H/IRQ4, 2F8H/IRQ3, 3E8H/IRQ4, 2E8H/IRQ10, and Disabled for
the onboard serial connector.
Onboard Serial Port 2 (2F8H/IRQ3)
Settings are 3F8H/IRQ4, 2F8H/IRQ3, 3E8H/IRQ4, 2E8H/IRQ10, and Disabled for
the onboard serial connector.
Onboard Parallel Port (378H/IRQ7)
This field sets the address of the onboard parallel port connector. You can select either
3BCH / IRQ 7, 378H / IRQ 7, 278H / IRQ 5, or Disabled. If you install an I/O card with
a parallel port, ensure that there is no conflict in the address assignments. The PC can
support up to three parallel ports as long as there are no conflicts for each port.
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IV. BIOS SOFTWARE
IV. BIOS
Chipset Features
Parallel Port Mode (ECP+EPP)
This field allows you to set the operation mode of the parallel port. The setting
Normal, allows normal-speed operation but in one direction only; EPP allows bidirectional parallel port operation at maximum speed; ECP allows the parallel port to
operate in bidirectional mode and at a speed faster than the maximum data transfer
rate; ECP+EPP allows normal speed operation in a two-way mode.
ECP DMA Select (3)
This selection is available only if you select ECP or ECP+EPP in the
Parallel Port Mode. Select either DMA Channel 1, 3, or Disabled.
Onboard IR (Disabled)
When enabled, this field activates the onboard infrared feature and sets the second serial
UART to support the infrared module connector on the motherboard. If your system
already has a second serial port connected to the onboard COM2 connector, it will no
longer work if you enable the infrared feature. By default, this field is set to Disabled,
which leaves the second serial port UART to support the COM2 serial port connector.
IR Mode (IrDA SIR)
This motherboard supports IrDA compatible Serial Infrared (SIR) and Fast Infrared
(FIR) communication modes. The FIR mode has two options: FIR/HP and FIR/
IBM, for computers or peripherals using HP and IBM’s infrared transceivers, respectively. When using either FIR option, FIR DMA Select must be configured to
reflect the DMA channel used by the port.
FIR DMA Select (1)
This allows you to configure the DMA channel used by the FIR port. Options are
DMA 1 (default) or DMA 3.
Onboard PCI IDE Enable (Both)
You can select to enable the Primary IDE channel, Secondary IDE channel, Both, or
Disable both channels (for systems with only SCSI drives).
IDE Ultra DMA Mode (Auto)
This sets the IDE UltraDMA to be active when using UltraDMA-capable IDE devices. The BIOS will automatically adjust or disable this setting for slower IDE
devices so that Auto or high settings will not cause problems for older IDE devices.
Choose Disable if you do not want this feature for all devices.
IDE 0 Master/Slave PIO/DMA Mode, IDE 1 Master/Slave PIO/DMA Mode (Auto)
Each channel (0 and 1) has both a master and a slave making four IDE devices possible.
Because each IDE device may have a different Mode timing (0, 1, 2, 3, 4), it is necessary
for these to be independent. PIO and DMA timings can be independently set. The default
setting of Auto will allow autodetection to ensure optimal performance.
IV. BIOS
Chipset Features
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IV. BIOS SOFTWARE
Power Management Setup
Power Management Setup allows you to reduce power consumption. This feature
turns off the video display and shuts down the hard disk after a period of inactivity.
NOTE: SETUP Defaults are enclosed in parentheses next to each function heading.
Details of Power Management Setup
IV. BIOS
Power Management
Power Management (User Define)
This field acts as the master control for the power management modes. User Define
allows you to set power saving options according to your preference; Disable disables the power saving features; Min Saving puts the system into power saving mode
after 40 min of system inactivity; Max Saving puts the system into power saving
mode after 30 sec of system inactivity.
IMPORTANT: Advanced Power Management (APM) should be installed to
keep the system time updated when the computer enters suspend mode activated by the BIOS Power Management. For DOS environments, you need to
add DEVICE=C:\DOS\POWER.EXE in you CONFIG.SYS. For Windows 3.x
and Windows 95, you need to install Windows with the APM feature. A battery
and power cord icon labeled “Power” will appear in the “Control Panel.” Choose
“Advanced” in the Power Management Field.
Video Off Option (Susp,Stby -> Off )
This field determines when to activate the video off feature for monitor power
management. The settings are All Modes -> Off; Always On; Suspend -> Off; and
Susp,Stby -> Off .
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IV. BIOS SOFTWARE
IV. BIOS
Power Management
Video Off Method (DPMS OFF)
This field defines the video off features. These options are available: DPMS OFF,
DPMS Reduce ON, Blank Screen, V/H SYNC+Blank, DPMS Standby, and DPMS Suspend. The DPMS (Display Power Management System) features allow the BIOS to
control the video display card if it supports the DPMS feature. Blank Screen only
blanks the screen (for monitors without power management or “green” features). If set
up in your system, your screen saver will not display with Blank Screen selected). V/H
SYNC+Blank blanks the screen and turns off vertical and horizontal scanning.
......................................................................................................................................
PM Timers
This section controls the time-out settings for the Power Management scheme. The
fields included in this section are HDD Power Down, which places the hard disk
into its lowest power consumption mode, and the Doze, Standby and Suspend system inactivation modes.
The system automatically “wakes up” from any power saving mode when there is
system activity, such as when a key is pressed from the keyboard, or when there is
activity detected from the enabled IRQ channels.
HDD Power Down (Disable)
This shuts down any IDE hard disk drives in the system after a period of inactivity.
This time period is user-configurable from 1 Min to 15 Min or Disable. This feature
does not affect SCSI hard disks.
Doze Mode, Standby Mode, Suspend Mode (Disable)
These fields set the period of time after which each of these modes activate: 1 Min, 2 Min,
3 Min, 4 Min, 8 Min, 20 Min, 30 Min, 40 Min, or 1 Hour. The default setting is Disable.
.......................................................................................................................................
Power Up Control
This section determines the ways the system can be controlled when it is started or
restarted, when modem activity is detected, or when power to the computer is interrupted and reapplied. The Soft-Off mode refers to powering off the system through
a momentary button switch (ATX switch) or through the software as opposed to
disconnecting the AC power by way of a rocker switch or other means.
PWR Button < 4 Secs (Soft Off)
When set to Soft Off, the ATX switch can be used as a normal system power-off
button when pressed for less than 4 seconds. Suspend allows the button to have a
dual function where pressing less than 4 seconds will place the system in sleep
mode. xRegardless of the setting, holding the ATX switch for more than 4 seconds
will power off the system.
PWR Up On Modem Act (Enabled)
This allows either settings of Enabled or Disabled for powering up the computer (turns
the ATX power supply on) when the modem receives a call while the computer is off.
NOTE: The computer cannot receive or transmit data until the computer and applications are fully running, thus connection cannot be made on the first try. Turning
an external modem off and then back on while the computer is off causes an initialization string that will also cause the system to power on.
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IV. BIOS SOFTWARE
Wake On LAN (Enabled)
This allows you to remotely power up your system thorugh your network by sendng
a wake-up frame or signal. With this feature, you can remotely upload/download
data to/from systems during off-peak hours. Set to Enabled to use this feature.
IMPORTANT: This feature requires the ASUS PCI-L101 LAN Card (see VI. ASUS
LAN Card) and an ATX power supply with at least 720mA +5V standby power.
ASUS P5A-B User’s Manual
IV. BIOS
Power Management
Power Management
Automatic Power Up (Disabled)
This allows you to have an unattended or automatic power up of your system. You
may configure your system to power up at a certain time of the day by selecting Everyday, which will allow you to set the time or at a certain time and day by selecting By
Date.
.....................................................................................................................................
Fan Monitor (xxxxRPM)
The onboard hardware monitor is able to detect the Chassis Fan Speed, CPU Fan
Speed, and the Power Supply Fan Speed in Rotations Per Minute (RPM). Set to
Ignore if one of these are not used so that error messages will not be given.
Thermal Monitor (xxxC/xxxF)
The onboard hardware monitor is able to detect the CPU and MB (motherboard) temperatures. Set to Ignore only if necessary.
Voltage Monitor (xx.xV)
The onboard hardware monitor is able to detect the voltages put out by the voltage
regulators. Set to Ignore only if necessary.
NOTE: If any of the monitored items are out of range, an error message will appear:
“Hardware Monitor found an error, enter POWER MANAGEMENT SETUP for
details”. You will then be prompted to “Press F1 to continue, DEL to enter SETUP”.
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IV. BIOS SOFTWARE
PNP and PCI Setup
PNP and PCI Setup configures the PCI bus slots. All PCI bus slots on the system
use INTA#, thus all installed PCI cards must be set to this value.
NOTE: SETUP Defaults are enclosed in parentheses next to each function heading.
Details of PNP and PCI Setup
IV. BIOS
Plug & Play/PCI
PNP OS Installed (No)
This field allows you to use a Plug-and-Play (PnP) operating system to configure
the PCI bus slots instead of using the BIOS. Thus interrupts may be reassigned by
the OS when Yes is selected. When a non-PnP OS is installed or to prevent reassigning of interrupt settings, select the default setting of No.
Slot 1 IRQ to Slot 3 IRQ (Auto)
These fields set how IRQ use is determined for each PCI slot. The default setting for
each field is Auto, which uses auto-routing to determine IRQ use. The other options are
manual settings of NA, 5, 7, 9, 10, 11, 12, 14 or 15 for each slot.
PCI Latency Timer (32 PCI Clock)
The default setting of 32 PCI Clock enables maximum PCI performance.
IRQ xx Used By ISA (No/ICU)
These fields indicate whether or not the displayed IRQ for each field is being used
by a legacy (non-PnP) ISA card. Two options are available: No/ICU and Yes. The
first option, the default value, indicates either that the displayed IRQ is not used or
an ISA Configuration Utility (ICU) is being used to determine if an ISA card is
using that IRQ. If you install a legacy ISA card that requires a unique IRQ, and you
are not using an ICU, you must set the field for that IRQ to Yes. For example: If you
install a legacy ISA card that requires IRQ 10, then set IRQ10 Used By ISA to Yes.
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IV. BIOS SOFTWARE
DMA x Used By ISA (No/ICU)
These fields indicate whether or not the displayed DMA channel for each field is
being used by a legacy (non-PnP) ISA card. Available options include: No/ICU and
Yes. The first option, the default setting, indicates either that the displayed DMA
channel is not used or an ICU is being used to determine if an ISA card is using that
channel. If you install a legacy ISA card that requires a unique DMA channel, and
you are not using an ICU, you must set the field for that channel to Yes.
IV. BIOS
Load Setup Defaults
ISA MEM Block BASE (No/ICU)
This field allows you to set the base address and block size of a legacy ISA card that
uses any memory segment within the C800H and DFFFH address range. If you
have such a card, and you are not using an ICU to specify its address range, select a
base address from the six available options; the ISA MEM Block SIZE field will
then appear for selecting the block size. If you have more than one legacy ISA card
in your system that requires to use this address range, you can increase the block
size to either 8K, 16K, 36K, or 64K. If you are using an ICU to accomplish this task,
leave ISA MEM Block BASE to its default setting of No/ICU.
USB Function (Disabled)
This motherboard supports Universal Serial Bus (USB) devices. Set to Enabled if
you want to use USB devices. Your system must support USB function. The default
setting is Disabled.
IV. BIOS
Plug & Play/PCI
USB IRQ (Auto)
This field allows you to reserve an IRQ# (5, 7, 9, 10, 11, 12, 14, or 15) for the USB
to work. Auto assigns an IRQ# automatically to your USB device. If you are not
using a USB device, you may disable this feature by setting it to NA to save an extra
IRQ# for other devices or expansion cards.
VGA BIOS Sequence (PCI/AGP)
If your computer has both PCI and AGP VGA cards, this field allows you to select
which of the cards will act as your primary card. The default, PCI/AGP, allows your
PCI card to take precedent when detected. AGP/PCI uses the AGP card as your
primary card.
Onboard Audio Chip (Enabled)
This field allows you to enable the onboard audio. If you do not want to use the onboard
audio, select Disabled. Available only on motherboards with the audio option. To resolve conflicts with the onboard audio, use the table on the following page for system resource allocation. This field is available only on motherboards with the onboard
audio option.
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IV. BIOS SOFTWARE
Onboard Audio Plug and Play Resource Data (CMI8330)
Device Number
Device name
First I/O
Resource
Length
Default Value
Second I/O Resource
Length
Default Value
IRQ
Resource
Default Value
First DMA Resource
Default Value
Second DMA Resource
Default Value
0
WSS&FM
530h,E80h,F40h
8h
530h
388h-3F8h
8h
388h
5,7,9,10,11,12
11
0,1,3
0
-----
1
MIDI
300h-330h
2h
330h
------5,7,9,10,11,12
9
---------
2
GAME
200h-FE0h
8h
200h
-------------------
3
SB16
220h,240h
10h
220h
------5,7,9,10,11,12
5
0,1,3
1
5,7
5
Load BIOS Defaults
This “Load BIOS Defaults” option allows you to load the troubleshooting default
values permanently stored in the BIOS ROM. These default settings are non-optimal
and disable all high performance features. To load these default settings, highlight
“Load BIOS Defaults” on the main screen and then press <Enter>. The system displays a confirmation message on the screen. Press <Y> and then <Enter> to confirm.
Press <N> and then <Enter> to abort. This feature does not affect the fields on the
Standard CMOS Setup screen.
IV. BIOS
Load Defaults
Load Setup Defaults
This “Load Setup Defaults” option allows you to load the default values to the system
configuration fields. These default values are the optimized configuration settings for
the system. To load these default values, highlight “Load Setup Defaults” on the main
screen and then press <Enter>. The system displays a confirmation message on the
screen. Press <Y> and then <Enter> to confirm. Press <N> and then <Enter> to
abort. This feature does not affect the fields on the Standard CMOS Setup screen.
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IV. BIOS SOFTWARE
Supervisor Password and User Password
IV. BIOS
Passwords
These two options set the system passwords. “Supervisor Password” sets a password that will be used to protect the system and the Setup utility; “User Password”
sets a password that will be used exclusively on the system. By default, the system
comes without any passwords. To specify a password, highlight the type you want
and then press <Enter>. A password prompt appears on the screen. Taking note that
the password is case sensitive, and can be up to 8 alphanumeric characters long, type
in your password and then press <Enter>. The system confirms your password by
asking you to type it again. After setting a password, the screen automatically reverts to the main screen.
To implement password protection, specify in the “Security Option” field of the
BIOS Features Setup screen when the system will prompt for the password. If you
want to disable either password, press <Enter> instead of entering a new password
when the “Enter Password” prompt appears. A message confirms the password has
been disabled.
NOTE: If you forget the password, see CMOS RAM in section III for procedures
on clearing the CMOS.
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IV. BIOS SOFTWARE
IDE HDD Auto Detection
IDE HDD Auto Detection detects the parameters of an IDE hard disk drive, and
automatically enters them into the Standard CMOS Setup screen.
IV. BIOS
Hard Disk Detect
Up to four IDE drives can be detected, with parameters for each listed inside the
box. To accept the optimal entries, press <Y> or else select from the numbers displayed under the OPTIONS field (2, 1, 3 in this case); to skip to the next drive, press
<N>. If you accept the values, the parameters will appear listed beside the drive
letter on the screen. The process then proceeds to the next drive letter. Pressing
<N> to skip rather than to accept a set of parameters causes the program to enter
zeros after that drive letter.
Remember that if you are using another IDE controller that does not feature Enhanced IDE support for four devices, you can only install two IDE hard disk drives.
Your IDE controller must support the Enhanced IDE features in order to use Drive E
and Drive F. The onboard PCI IDE controller supports Enhanced IDE, with two
connectors for connecting up to four IDE devices. If you want to use another controller that supports four drives, you must disable the onboard IDE controller in the
Chipset Features Setup screen.
When auto-detection is completed, the program automatically enters all entries you
accepted on the field for that drive in the Standard CMOS Setup screen. Skipped
entries are ignored and are not entered in the screen.
If you are auto-detecting a hard disk that supports the LBA mode, three lines will
appear in the parameter box. Choose the line that lists LBA for an LBA drive. Do
not select Large or Normal.
The auto-detection feature can only detect one set of parameters for a particular IDE
hard drive. Some IDE drives can use more than one set. This is not a problem if the
drive is new and empty.
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IV. BIOS SOFTWARE
IMPORTANT: If your hard disk was already formatted on an older previous system,
incorrect parameters may be detected. You will need to enter the correct parameters
manually or use low-level format if you do not need the data stored on the hard disk.
If the parameters listed differ from the ones used when the disk was formatted, the
disk will not be readable. If the auto-detected parameters do not match the ones that
should be used for your disk, do not accept them. Press <N> to reject the presented
settings and enter the correct ones manually from the Standard CMOS Setup screen.
Save & Exit Setup
IV. BIOS
Save and Exit
Select this option to save into the CMOS memory all modifications you specified
during the current session. To save the configuration changes, highlight the “Save
& Exit Setup” option on the main screen, type “Y”, and then press <Enter>.
Exit Without Saving
Select this option to exit the Setup utility without saving the modifications you specify
during the current session. To exit without saving, highlight the “Exit Without Saving” option on the main screen and then press <Enter>.
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ASUS P5A-B User’s Manual
V. SUPPORT SOFTWARE
ASUS Smart Motherboard Support CD
(Included only with motherboards with onboard hardware monitoring)
NOTE: The support CD version and contents are subject to change at any time without notice.
To begin using your support CD disc, just insert it into your CD-ROM drive and the support
CD installation menu will appear. If the menu does not appear, double click or run
D:\SETUP.EXE (assuming that your CD-ROM drive is drive D:).
•
•
•
•
•
•
•
•
•
•
•
•
ASUS PC Probe Setup: Installs a simple utility to monitor your computer’s fan, temperature, and voltages. (NOTE: This utility will not run with LDCM installed.) A user’s
manual in Adobe Acrobat PDF format is available under the Probe folder created on
your system during setup. You may refer also to the section on the ASUS PC Probe of this
motherboard manual.
Adobe Acrobat Reader: Installs the Adobe Acrobat Reader software necessary to view
the user’s manuals in Adobe Acrobat PDF format.
BusMaster: Installs the ALi BusMaster IDE driver for improved performance.
Install Audio Driver: Displays instructions on installing the audio drivers for Windows
95, DOS and Windows 3.1.
Install Audio Utilities: Installs the CM18330 Audio Rack utilities, namely, Audio Rack, CD
Player, MIDI Player, Mixer, MPU-401 MIDI Device Setting, Surround Sound Demo, and
Wave Player. Refer to the audio section of this motherboard manual for more information.
Uninstall Audio Driver: Uninstalls the audio adapter device drivers that has been installed on your system.
Patch for ALi chipset: Installs the M7101 Patch for Windows 95.
Install PCCillin: Installs the PC-cillin virus protection software. View the online help if
you have any questions.
LDCM Introduction (MPEG VCD): Allows you to view a video on the LDCM features.
Browse this CD: Allows you to view the contents of the CD.
Readme: Displays the filelist for the included support software.
Exit: Exit the selection menu.
ASUS P5A-B User’s Manual
V. SOFTW ARE
Support CD
Additonal CD Contents: DMI Configuration Utility under the DMI folder and Flash BIOS
writer under the AFLASH folder, ALi AGP Mini Port Driver for Windows 95/Windows 98
under ALIAGP folder, and the 3 Mode Floppy Driver for DOS/Windows 95/Windows NT
under the 3MODE folder.
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V. SUPPORT SOFTWARE
Desktop Management Interface (DMI)
Introducing the ASUS DMI Configuration Utility
This motherboard supports DMI within the BIOS level and provides a DMI Configuration Utility to maintain the Management Information Format Database (MIFD).
DMI is able to auto-detect and record information pertinent to a computer’s system
such as the CPU type, CPU speed, internal/external frequencies, and memory size.
The onboard BIOS will detect as much system information as possible and store
those collected information in a 4KB block in the motherboard’s Flash EEPROM
and allow the DMI to retrieve data from this database. Unlike other BIOS software,
the BIOS on this motherboard uses the same technology implemented for Plug and
Play to allow dynamic real-time updating of DMI information versus creating a new
BIOS image file and requiring the user to update the whole BIOS. This DMI Configuration Utility also allows the system integrator or end user to add additional
information into the MIFD such as serial numbers, housing configurations, and vendor information. Those information not detected by the motherboard BIOS and has
to be manually entered through the DMI Configuration Utility and updated into the
MIFD. This DMI Configuration Utility provides the same reliability as PnP updating and will prevent the refreshing failures associated with updating the entire BIOS.
Starting the ASUS DMI Configuration Utility
The DMI Configuration Utility (DMICFG.EXE) must be used in real mode in order
for the program to run, and the base memory must be at least 180K. Memory managers like HIMEM.SYS (required by windows) must not be installed. You can boot
up from a system diskette without AUTOEXEC.BAT and CONFIG.SYS files, “REM”
HIMEM.SYS in the CONFIG.SYS, or press <shift>+<F5> during bootup to bypass
your AUTOEXEC.BAT and CONFIG.SYS files.
V. SOFTW ARE
DMI Introduction
1.
2.
3.
4.
5.
60
In Windows, copy DMICFG.EXE to your hard disk drive.
Restart your computer and press <shift>+<F5> during bootup to enter DOS.
Select Safe mode command prompt only.
Go to the directory containing DMICFG.EXE.
Type DMICFG and press <Enter> to run.
ASUS P5A-B User’s Manual
V. SUPPORT SOFTWARE
Using the ASUS DMI Configuration Utility
Edit DMI (or delete)
Use the ←→ (left-right) cursors to move the top menu items and the ↑↓ (up-down)
cursor to move between the left hand menu items. The bottom of the screen will
show the available keys for each screen. Press enter at the menu item to enter the
right hand screen for editing. “Edit component” appears on top. The reversed color
field is the current cursor position and the blue text are available for editing. The
orange text shows auto-detected information and are not available for editing. The
blue text “Press [ENTER] for detail” contains a second pop-up menu is available,
use the + - (plus-minus) keys to change the settings. Enter to exit and save, ESC to
exit and not save.
V. SOFTW ARE
Using DMI Utility
If the user has made changes, ESC will prompt you to answer Y or N. Enter Y to go
back to the left-hand screen and save, enter N to go back to left-hand screen and not
save. If editing has not been made, ESC will send you back to the left hand menu
without any messages.
Notes
A heading, *** BIOS Auto Detect ***, appears on the right for each menu item
on the left side that has been auto detected by the system BIOS.
A heading, *** User Modified ***, will appear on the right for menu items that
have been modified by the user.
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V. SUPPORT SOFTWARE
Save MIFD
You can save the MIFD (normally only saved to flash ROM) to a file by entering the
drive and path here. If you want to cancel save, you may press ESC and a message
“Bad File Name” appears here to show it was not saved.
Load MIFD
You can load the disk file to memory by entering a drive and path and file name
here.
Load BIOS Defaults
V. SOFTW ARE
Using DMI Utility
You can load the BIOS defaults from a MIFD file and can clear all user modified
and added data. You must reboot your computer in order for the defaults to be saved
back into the Flash BIOS.
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VI. ASUS CIDB
VI. ASUS CIDB
Connectors
The ASUS CIDB Chassis Sensor
The optional ASUS CIDB is a module for providing audio alarm and logging when
there is an intrusion into the chassis of a computer system. The module detects a chassis intrusion by either light striking its photo sensor or by contact when its switch
connectors are shorted by chassis-mounted momentary toggle switches. An intrusion
memory function allows detection by BIOS and LDCM on the next bootup.
Photo sensor to detect intrusion by light
Photo sensor sensitivity adjustment
Battery for the memory
Buzzer to sound the alarm
Intrusion memory
Connector to dock with the motherboard’s chassis connector
Two switch connectors to detect intrusion by chassis
mounted micro switches
Using the ASUS CIDB
1. You must have an ASUS motherboard with a chassis connector.
2. Connect the CIDB directly to the chassis connector or use the provided extension
cable and mount the CIDB to the chassis using a double-sided foam adhesive tape.
CAUTION! The CIDB component pins and metallic points must not come in
contact with another metallic surface or else shorting will occur!
3. Check the hardware settings:
• JP1 jumper should be enabled to use the photo sensor
• MS1 and MS2 connectors should be connected to momentary toggle switches
mounted on the chassis to use the contact method for triggering alarms.
• SW jumper should be enabled to allow the hardware monitoring components to receive signals from the CIDB.
4. To stop the alarm from sounding, use the LDCM software or place a jumper on
(or short manually) the CLR jumper momentarily.
5. If you have an updated BIOS with intrusion support. Booting the computer after
an intrusion will require a password which is configured through BIOS.
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VI. ASUS CIDB
Setting up the ASUS CIDB
VI. ASUS CIDB
Connectors
CON
CLR
CR2032 3V
Lithium Cell
SW
Buzzer
JP1
JP1
JP1
OR
1
1
Enable
Disable
JP1:
Enable/Disable
the Photo Sensor
3
MS2
+5 volt standby
from power supply
MS1
CLR
CLR
Normal
Clear
MS1
1
CON
(sensitive) 5
0 (not sensitive)
CON:
Sensitivity adjustment for the
photo sensor, (0) is least sensitive
and (5) is most sensitive
SW
SW
Clear:
Stops the sounding alarm
MS2
best range
2
4
MS1/MS2:
Micro Switch from the chassis
panel can be connected here
to trigger the chassis intrusion
alarm.
1
1
Enable
Disable
SW:
Enable/Disable chassis intrusion
function in the motherboard
ASUS CIDB Additional Considerations
1. All motherboards with CIDB: If there is no power to the motherboard (i.e. removing the power cord or turning the power supply’s switch off) the alarm will
not sound but the CIDB will still memorize an intrusion event which BIOS and
LDCM will detect on the next bootup.
2. Motherboard with chassis intrusion components: Photo sensor, switch, and
memory will not operate with power removed. Power is required to send a signal to the motherboard’s intrusion memory and buzzer. When using the CIDB
on these motherboards, all the CIDB functions will be disabled, the motherboard’s
intrusion components must still be used. The CIDB can benefit these motherboards by providing a chassis switch which will operate even when the power is
removed. Pins [2-3] of the SW jumper can be used for a momentary toggle
switch and the CIDB’s battery will be used to send an intrusion signal to the
motherboard’s intrusion memory.
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VII. ASUS LAN Card
VII. ASUS LAN Card
Parts/Layout
ASUS PCI-L101 Fast Ethernet Card
LEDs
LAN Activity
Output Signal
Intel
Chipset
RJ45
Wake on LAN
Output Signal
ASUS
Motherboard type
Other
If you are using the ASUS PCI-L101 on an ASUS motherboard, leave the jumper on
its defaut setting of “ASUS.” If you are using another brand of motherboard, set the
jumper to “Other.” Connect the Wake on LAN (WOL) output signal to the
motherboard’s WOL_CON in order to utilize the wake on LAN feature of the motherboard. Connect the LAN activity output signal (LAN_LED) to the system cabinet’s
front panel LAN_LED to display the LAN data activity.
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VII. ASUS LAN Card
Features
VII. ASUS LAN Card
Information
•
•
•
•
•
•
•
•
•
•
•
•
Intel 82558 Ethernet LAN Controller (Fully integrated 10BASE-T/100BASE-TX)
Wake-On-LAN Remote Control Function Supported
PCI Bus Master Complies to PCI Local Bus Rev. 2.1 specifications
Consists of MAC & PHY (10/100Mbps) interfaces
Complies to IEEE 802.3 10BASE-T and IEEE 802.3u 100BASE-TX interfaces
Fully supports 10BASE-T & 100BASE-TX operations through a single RJ45 port
Supports 32-bit Bus Master Technology / PCI Rev. 2.1
Enhancements on ACPI & APM
Adheres to PCI Bus Power Management Interface Rev. 1.0, ACPI Rev. 1.0, and
Device Class Power Management Rev. 1.0
IEEE 802.3u auto-negotiation for 10Mbps/100Mbps Network Data Transfer Rates.
Provides LED indicators for monitoring network conditions
Plug and Play
Software Driver Support
•
•
•
NetWare ODI Drivers - Novell Netware 3.x, 4.x, DOS, OS/2 Client
NDIS 2.01 Drivers - Microsoft LAN Manager, Microsoft Windows 3.11, IBM
LAN Server
NDIS 3.0 Drivers - Microsoft Windows NT, Microsoft Windows 95, Microsoft
Windows 3.11
Question and Answer
Q: What is Wake-On-LAN ?
A: The Wake-On-LAN feature provides the capability to remotely power on systems supporting Wake-On-LAN by simply sending a wake-up frame. With this
feature, remotely uploading/downloading data to/from systems during off-peak
hours will be feasible.
Q: What can Wake-On-LAN do for you ?
A: Wake-On-LAN is a remote management tool with advantages that can reduce
system management workload, provide flexibility to the system administrator’s
job, and then of course save you time-consuming efforts and costs.
Q: What components does Wake-On-LAN require to be enable?
A: To enable Wake-On-LAN function, your system requires Ethernet LAN adapter
card that can activate Wake-On-LAN function, a client with Wake-On-LAN capability, and software such as LDCM Rev. 3.10 or up that can trigger wake-up frame.
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APPENDIX
Glossary
AGP (Accelerated Graphics Port)
An interface specification that enables high-performance 3D graphics on mainstream
PCs. AGP offers a higher throughput than PCI by providing the graphics controller
with direct access to system memory.
Bus
Bus Frequency
PCI
AGP 1X
AGP 2X
AGP 4X
33MHz
66MHz
133MHz
266MHz
Bus Speed
133MB/s
200-300MB/s
528MB/s
1 GB/s
APPENDIX
Glossary
AUTOEXEC.BAT
AUTOEXEC.BAT is a special-purpose file that is automatically executed by DOS
whenever the computer is turned ON or restarted. This file contains important commands that help configure the system to work with certain software and devices.
Windows 95 and later has its own startup files and may not use or may ignore parts
of the AUTOEXEC.BAT file.
BIOS (Basic Input/Output System)
BIOS is a set of routines that affect how the computer transfers data between computer components, such as memory, disks, and the display adapter. The BIOS instructions are built into the computer’s read-only memory. BIOS parameters can be
configured by the user through the BIOS Setup program. The BIOS can be updated
using the provided utility to copy a new BIOS file into the EEPROM.
Bit (Binary Digit)
Represents the smallest unit of data used by the computer. A bit can have one of two
values: 0 or 1.
Boot
Boot means to start the computer operating system by loading it into system memory.
When the manual instructs you to “boot” your system (or computer), it means to turn
ON your computer. “Reboot” means to restart your computer. When using Windows
95 or later, selecting “Restart” from “Start | Shut Down...” will reboot your computer.
Bus Master IDE
PIO (Programmable I/O) IDE requires that the CPU be involved in IDE access and
waiting for mechanical events. Bus master IDE transfers data to/from the memory
without interrupting the CPU. Bus master IDE driver and bus master IDE hard disk
drives are required to support bus master IDE mode.
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APPENDIX
Byte (Binary Term)
One byte is a group of eight contiguous bits. A byte is used to represent a single
alphanumeric character, punctuation mark, or other symbol.
COM Port
COM is a logical device name used by to designate the computer serial ports. Pointing devices, modems, and infrared modules can be connected to COM ports. Each
COM port is configured to use a different IRQ and address assignment.
CPU (Central Processing Unit)
The CPU, sometimes called “Processor,” actually functions as the “brain” of the
computer. It interprets and executes program commands and processes data stored
in memory. Currently, there are socket 370 (for Pentium Celeron-PPGA), socket 7
(for Pentium, AMD, Cyrix, IBM), slot 1 (for Pentium II and III), and slot 2 (for
Xeon) processors.
APPENDIX
Glossary
Device Driver
A device driver is a special set of instructions that allows the computer’s operating system to communicate with devices such as VGA, audio, ethernet, printer, or modem.
DOS (Disk Operating System)
DOS is the foundation on which all other programs and software applications operate, including Windows. DOS is responsible for allocating system resources such as
memory, CPU time, disk space, and access to peripheral devices. For this reason,
DOS constitutes the basic interface between you and your computer.
Hardware
Hardware is a general term referring to the physical components of a computer system, including peripherals, such as printers, modems, and pointing devices.
IDE (Integrated Drive Electronics)
IDE devices integrate the drive control circuitry directly on the drive itself, eliminating the need for a separate adapter card (in the case for SCSI devices). UltraDMA/
33 IDE devices can achieve up to 33MB/Sec transfer.
LPT Port (Line Printer Port)
Logical device name reserved by DOS for the computer parallel ports. Each LPT
port is configured to use a different IRQ and address assignment.
MMX
A set of 57 new instructions based on a technique called Single Instruction, Multiple
Data (SIMD), which is built into the new Intel Pentium PP/MT (P55C) and Pentium
II (Klamath) CPU as well as other x86-compatible microprocessors. The MMX instructions are designed to accelerate multimedia and communications applications,
such as 3D video, 3D sound, video conference.
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APPENDIX
PCI Bus (Peripheral Component Interconnect Local Bus)
PCI bus is a specification that defines a 32-bit data bus interface. PCI is a standard
widely used by expansion card manufacturers.
Peripherals
Peripherals are devices attached to the computer via I/O ports. Peripheral devices
allow your computer to perform an almost limitless variety of specialized tasks.
POST (Power On Self Test)
When you turn on the computer, it will first run through the POST, a series of software-controlled diagnostic tests. The POST checks system memory, the motherboard circuitry, the display, the keyboard, the diskette drive, and other I/O devices.
PS/2 Port
PS/2 ports are based on IBM Micro Channel Architecture. This type of architecture
transfers data through a 16-bit or 32-bit bus. A PS/2 mouse and/or keyboard may be
used on ATX motherboards.
APPENDIX
Glossary
RAID (Redundant Array of Independent Disks)
RAID can be set up to provide mirroring (for fault tolerance), parity (for data guarding), or striping (for data distribution over several drives for increased performance).
A RAID card is required to setup a RAID system.
RAM (Random Access Memory)
There are several different types of RAM such as DRAM (Dynamic RAM), EDO
DRAM (Extended Data Output DRAM), SDRAM (Synchronous DRAM).
ROM (Read Only Memory)
ROM is nonvolatile memory used to store permanent programs (called firmware)
used in certain computer components. Flash ROM (or EEPROM) can be reprogrammed with new programs (or BIOS).
SCSI (Small Computer System Interface)
High speed parallel interface defined by the X3T9.2 committee of the American
National Standards Institute (ANSI) for connecting many peripheral devices.
System Disk
A system disk contains the core file of an operating system and is used to boot up the
operating system.
Ultra DMA/33
Ultra DMA/33 is a new specification to improve IDE transfer rates. Unlike traditional PIO mode, which only uses the rising edge of IDE command signal to transfer
data, the DMA/33 uses both rising edge and falling edge. Hence, the data transfer
rate is double of the PIO mode 4 or DMA mode 2. (16.6MB/s x2 = 33MB/s).
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APPENDIX
USB (Universal Serial Bus)
A new 4-pin serial peripheral bus that allows plug and play computer peripherals
such as keyboard, mouse, joystick, scanner, printer and modem/ISDN to be automatically configured when they are attached physically without having to install
drivers or reboot. With USB, the traditional complex cables from back panel of your
PC can be eliminated.
APPENDIX
Glossary
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