ASUS P5S-B User Manual

R

P5S-B

Super7 Baby AT 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, INCIDENT AL, 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 HAS 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.

• SiS is a trademark of Silicon Integrated Systems Corp.

• Adobe and Acrobat are registered trademarks of Adobe Systems Incorporated.

• Sound Blaster is a registered trademark of Creative Technology Ltd.

• Intel, LANDesk, and Pentium are registered trademarks of Intel Corporation.

• Symbios is a registered trademark of Symbios Logic 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 revi-

sions 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 THA T MAY APPEAR IN THIS MANUAL, INCLUD­ING THE PRODUCTS AND SOFTWARE DESCRIBED IN IT.

Copyright © 1999 ASUSTeK COMPUTER INC. All Rights Reserved.

Product Name: ASUS P5S-B
Manual Revision: 1.01 E364
Release Date: April 1999

2 ASUS P5S-B User’s Manual

ASUS CONTACT INFORMATION

ASUSTeK COMPUTER INC. (Asia-Pacific)

Marketing

Address: 150 Li-Te Road, Peitou, Taipei, Taiwan 112
Telephone: [phone]
Fax: [phone]
Email: [e-mail]

Technical Support

Tel (English): [phone] ext. 706
Tel (Chinese): [phone] ext. 111
Fax: [phone]
Email: [e-mail]
Newsgroup: news2.asus.com.tw
WWW: www.asus.com.tw
FTP: ftp.asus.com.tw/pub/ASUS

ASUS COMPUTER INTERNATIONAL (America)

Marketing

Address: 6737 Mowry Avenue, Mowry Business Center, Building 2

Newark, CA 94560, USA
Fax: [phone]
Email: [e-mail]

Technical Support

Fax: [phone]
BBS: [phone]
Email: [e-mail]
WWW: www.asus.com
FTP: ftp.asus.com.tw/pub/ASUS

ASUS COMPUTER GmbH (Europe)

Marketing

Address: Harkort Str. 25, 40880 Ratingen, BRD, Germany
Telephone: [phone]
Fax: [phone]
Email: [e-mail]

Technical Support

Hotline: [phone]
BBS: 49-2102-448690
Email: [e-mail]
WWW: www.asuscom.de
FTP: ftp.asuscom.de/pub/ASUSCOM

ASUS P5S-B User’s Manual 3

CONTENTS

I. INTRODUCTION.............................................................................. 7

How this Manual is Organized ........................................................... 7

Item Checklist ..................................................................................... 7

II. FEATURES ....................................................................................... 8

ASUS P5S-B Motherboard ................................................................. 8

Parts of the ASUS P5S-B Motherboard ............................................ 11

III. HARDWARE SETUP .................................................................... 12

ASUS P5S-B Motherboard Layout................................................... 12

Hardware Setup Steps ....................................................................... 15

1. Motherboard Settings.................................................................... 15

Compatible Cyrix CPU Identification .................................. 23

2. System Memory (DIMM) ............................................................. 25

DIMM Memory Installation Procedures: ............................. 26

3. Central Processing Unit (CPU).................................................... 27

4. Expansion Cards .......................................................................... 29

Expansion Card Installation Procedure: ............................... 29

Assigning IRQs for Expansion Cards................................... 29

Assigning DMA Channels for ISA Cards............................. 30

ISA Cards and Hardware Monitor ........................................ 30

5. External Connectors..................................................................... 31

Power Connection Procedures ................................................... 43

Flash Memory Writer Utility ............................................................ 44

IV. BIOS SETUP................................................................................... 44

Main Menu ................................................................................. 44

Managing and Updating Your Motherboard’s BIOS.................. 46

6. BIOS Setup .................................................................................. 47

Load Defaults ....................................................................... 48

Standard CMOS Setup ............................................................... 48

Details of Standard CMOS Setup......................................... 48

BIOS Features Setup .................................................................. 51

Details of BIOS Features Setup............................................ 51

Chipset Features Setup ............................................................... 54

Details of Chipset Features Setup......................................... 54

Power Management Setup.......................................................... 57

Details of Power Management Setup ................................... 57

PNP and PCI Setup .................................................................... 60

Details of PNP and PCI Setup .............................................. 60

4 ASUS P5S-B User’s Manual

CONTENTS

Load BIOS Defaults ................................................................... 62

Load Setup Defaults ................................................................... 62

Supervisor Password and User Password .................................. 63

IDE HDD Auto Detection .......................................................... 64

Save & Exit Setup ...................................................................... 65

Exit Without Saving ................................................................... 65

V. SOFTWARE SETUP ....................................................................... 69

Operating Systems ............................................................................ 69

Windows 98 First Time Installation ........................................... 69

P5S-B Support CD............................................................................ 70

Installation Menu ....................................................................... 70

Install ASUS PC Probe Vx.xx .......................................................... 71

Install VGA Driver............................................................................ 72

Install Audio Driver (only with onboard audio option) .................... 73

Install ESS AudioRack32 (only with onboard audio option) ........... 74

Install ESS Software Wave Table

(only with onboard audio option)................................................ 75

Install PC-Cillin 98 Vx.xx ................................................................ 76

Install ADOBE AcroBat Reader Vx.x .............................................. 77

Install Bus Master IDE Driver .......................................................... 78

Uninstalling Programs ...................................................................... 79

VI. SOFTWARE REFERENCE.......................................................... 81

ASUS PC Probe ................................................................................ 83

SiS 530 Display Properties ............................................................... 88

AudioRack32 .................................................................................... 91

Desktop Management Interface (DMI)........................................... 100

VII. APPENDIX.................................................................................. 103

The ASUS PCI-L101 Fast Ethernet Card ....................................... 103

ASUS P5S-B User’s Manual 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! Any changes or modifications to this product not expressly ap-

proved by the manufacturer could void any assurances of safety or performance
and could result in violation of Part 15 of the FCC Rules.

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 P5S-B User’s Manual

I. INTRODUCTION

How this Manual is Organized

Introduction Manual information and checklist

I.

Features Information on motherboard features

II.

Installation Instructions on motherboard/jumper setup

III.

BIOS Setup Instructions on BIOS software setup

IV.

Software Setup Information on the included support software

V.

Software Reference References for the included support software

VI.

Appendix Optional items and reference

VII.

Item Checklist

Check that your package is complete. If you discover damaged or missing items,
contact your retailer.

(1) ASUS Motherboard

Sections/Checklist

I. INTRODUCTION

(1) Ribbon cable for master and slave IDE drives
(1) Ribbon cable for (1) 5.25” and (2) 3.5” floppy disk drives
(1) Ribbon cable for VGA with mounting bracket
(1) Connector set for PS/2 mouse and parallel port
(1) Connector set for serial ports
(1) Bag of spare jumpers
(1) Support CD with drivers and utilities
(1) Motherboard User’s manual

Connector set for LCD (with LCD chip onboard)
Connector set for audio input/output and game/MIDI port (with audio chip

onboard)
ASUS IrDA-compliant module (optional)

ASUS PCI-L101 Wake-On-LAN 10/100 ethernet card (optional)

ASUS P5S-B User’s Manual 7

II. FEATURES

Features

II. FEATURES

ASUS P5S-B Motherboard

The ASUS P5S-B is carefully designed for the demanding PC user who wants advanced
features in a small package.

Specifications

• SiS AGPset: SiS® (Silicon Integrated Systems Corp.) 530 AGPset with support for a

100MHz Front Side Bus (FSB), all current Socket 7 processors and integrated Super AGP
2X 2D/3D VGA controller for high performance hardware 2D/3D VGA acceleration.

• Multi-Processor/Multi-Speed Support: AMD® K6®-2/266 & faster, AMD® K6®/166 &

faster, AMD® K5™/100–133, IBM®/Cyrix® 6x86MX™/M II™ (PR166 & faster), IBM®/
Cyrix® 6x86-PR166+ (Rev 2.7 or later), Intel® Pentium® 100–233MHz (P55C-MMX™,
P54C/P54CS).

• Multi-Cache: Features 512KB/1MB (when chip is available) pipelined-burst SRAM/

L2 memory cache and integrated T ag RAM to make using the 100MHz bus speed possible.

• 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 enhanced 95MHz/100MHz bus speed requirement.

• AGP 2X VGA Onboard: SiS 530 built-in 2D/3D AGP VGA (on AGPset) with capa-

bility to use shared system memory or optional 8MB SDRAM as local graphics
memory.

• Peripheral Wake Up: Supports modem wake up, keyboard wake up, and LAN card

wake up functions from sleep or soft-off mode.

• Onboard Audio (optional): Provides ESS

round and positioning capability and audio CODEC that conforms to AC’97 analog
component specifications. Includes complete online software guide.

• PC Health Monitoring: Provides an easier and convenient way to examine and man-

age system status information, such as CPU and system voltages, temperatures, and
fan status through the onboard PCIset (South Bridge) and the bundled PC Probe from
ASUS.

• UltraDMA/66 BM IDE: Comes with an onboard PCI Bus Master IDE controller with

two connectors that support four IDE devices in two channels, supports UltraDMA/66,
UltraDMA/33, PIO Modes 3/4 and Bus Master IDE DMA Mode 2, and supports En­hanced IDE devices, such as T ape Backup, CD-ROM, CD-R, CD-R W , and LS-120 drives.

• W ake-On-LAN: Supports Wake-On-LAN activity through an optional ASUS PCI-
L101 10/100 Fast Ethernet PCI card (see APPENDIX) or a similar ethernet card.

• 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 (with
SIR) to the Infrared Module for wireless connections.

• USB: Supports the Universal Serial Bus standard through the onboard connectors for
multi-device connections.

• IrDA: Supports an optional infrared port module for a wireless interface.

®

Solo-1 PCI audio chipset with 3D sur-

• Digital Flat Panel Interface: Provides an optional direct connection for connecting
a digital flat panel to your PC.

8 ASUS P5S-B User’s Manual

II. FEATURES

Special Features

• Enhanced ACPI and Anti-Boot Virus BIOS: Features a programmable BIOS,

offering enhanced ACPI for Windows 98 compatibility, built-in firmware-based
virus protection through T rend ChipA way V irus codes, and autodetection of most
devices for virtually automatic setup.

• 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 SOFTWARE

REFERENCE.)

• Easy Installation: Incorporates BIOS that supports autodetection of hard disk

drives, PS/2 mouse, and Plug and Play devices to make the setup of hard disk
drives, expansion cards, and other devices virtually automatic.

• PC’98 Compliant: Both the BIOS and hardware levels of this motherboard 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 95/98/NT.

Smart Series

II. FEATURES

• Symbios SCSI BIOS: Supports optional ASUS SCSI controller cards or other

Symbios SCSI cards through the onboard SYMBIOS firmware.

Performance Features

• Concurrent PCI: Concurrent PCI allows multiple PCI transfers from PCI mas-

ter busses to the memory and processor.

• High-Speed Data T ransfer Interface: This motherboard with its chipset and sup-

port for UltraDMA/66 doubles the UltraDMA/33 burst transfer rate to 66.6MB/s.
UltraDMA/66 is backward compatible with both DMA/33 and DMA and with
existing DMA devices and systems so there is no need to upgrade current EIDE/
IDE drives and host systems. (UltraDMA/66 requires a 40-pin 80-conductor cable
to be enabled and/or for UltraDMA Mode 4.)

• SDRAM Optimized Performance: Supports the new generation memory —

Synchronous Dynamic Random Access Memory (SDRAM) — which increases
the data transfer rate to 800MB/s max using PC100-compliant SDRAM.

Intelligent Features

• Fan Status Monitoring and Alarm: To prevent system overheat and system

damage, the CPU and chassis fans are monitored for RPM and failure. Each fan
can be set for its normal RPM range and alarm thresholds.

• T emperature Monitoring and Alert: T o avoid any failures triggered by extremely

high temperature, there is a heat sensor under the CPU to make sure your system
is operating at a safe heat level.

ASUS P5S-B User’s Manual 9

II. FEATURES

Smart Series

II. FEATURES

• 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 (requir es A TX power supply): Pushing the power
button for less than 4 seconds when the system is in the working state places the
system into one of two states: sleep mode or soft-off mode, depending on the
BIOS setting (see Power Management Setup under BIOS SETUP). When the
power button is pressed for more than 4 seconds, the system enters the soft-off
mode regardless of the BIOS setting.

• Keyboard Power Up: Keyboard Power Up can be enabled or disabled to allow
the computer to be powered on by pressing the keyboard’s spacebar.

• 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 95/98/
NT and OS/2, require much more memory and hard drive space to present enor ­mous 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 on managing the user’s limited resources more
efficiently are provided.

• 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.

• Remote Ring On (requires external modem): This feature allows a computer to
be turned on remotely through an external 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): Turbo 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.

10 ASUS P5S-B User’s Manual

II. FEATURES

Parts of the ASUS P5S-B Motherboard

87654321

25
24

23
22
21

20

19
18

II. FEATURES

Motherboard Parts

17

1 Parallel Port Connector
2 AT Power Connector
3 ATX Power Connector
4 VGA Header
5 8MB VGA Memory (optional)
6 SiS AGPset with Heatsink
7 DIMM Sockets
8 CPU ZIF Socket 7
9 Panel Connectors

10 Audio Connector (with audio chip

onboard)

11 PCI Audio (ESS Solo-1) (optional)
12 IDE Connectors

11

14 13 12

13 SiS Super South Bridge with Built-

in Hardware Monitoring

14 ISA Slots
15 LCD Header (with LCD chip onboard)
16 Wake-On-LAN Connector
17 Super Multi I/O Chip
18 Programmable Flash ROM (2Mbit)
19 PCI Slots
20 TV Out Interface (optional)
21 PS/2 Mouse, USB, IR Connector
22 LCD chip/TV Out chip (optional)
23 Floppy Disk Drive Connector
24 Serial Port Connectors
25 Keyboard Connector

101516

9

ASUS P5S-B User’s Manual 11

III. HARDWARE SETUP

ASUS P5S-B Motherboard Layout

KB_UP

KB

COM 1 COM 2

Motherboard Layout

III. H/W SETUP

USB/MIR

Multi I/O

PS/2PWR

PWR_FAN

P8

Parallel Port

P9

ATX Power Connector

VGA

Header

FLOPPY

SCART

PCI Slot 1 (PCI1)

WOL_CON

SMB

PCI Slot 2 (PCI2)

2Mbit Flash EEPROM

(Programmable BIOS)

WOR

PCI Slot 3 (PCI3)

PCI Slot 4 (PCI4)

ISA Slot 1 (Slot1)

ISA Slot 2 (Slot2)

Row

01

0
1

2
3

4
5

DIMM Socket 1 (64/72-bit, 168-pin module)

DIMM Socket 2 (64/72-bit, 168-pin module)

DIMM Socket 3 (64/72-bit, 168-pin module)

2 MB

SDRAM

SiS 530

2 MB

SDRAM

2 MB

SDRAM

2 MB

SDRAM

LCDHD

CR2032 3V
Lithium Cell

CMOS Power

Chipset

(AGP V GA

built in)

SECONDARY IDE

PRIMARY IDE

DIP Switches

(DIP 1)

SiS5595

with Hardware

Monitor

CLRTC

MODEM

1024KB

Pipelined

Burst L2

Cache

Thermal Sensor

CPU ZIF Socket 7

ESS

Audio

Chip

Audio Connectors

AUX

512KB/

1024KB

Pipelined

Burst L2

Cache

CD2CD1

(DIP2)

DIP Switches

CPU_FAN

IDELED

CHA_FAN

IR

Panel

Dimmed components are optional.

12 ASUS P5S-B User’s Manual

III. HARDWARE SETUP

Motherboard Feature Settings

1) KB_UP p. 16 Keyboard Power (Wake) Up (Enable/Disable)

2) DIP 1 – Switch 1 p. 17 VGA Frame Buffer Setting (Shared/Local)

3) DIP 1 – Switch 2 p. 17 Onboard VGA Setting (Enable/Disable)

4) DIP 1 – Switch 3 p. 18 Onboard Audio Setting (Enable/Disable)

5) DIP 1 – Switches 4, 5 p. 18 VIO Setting

6) DIP 2 – Switch 9 p. 19 TV Out Setting (AV/RGB)

7) DIP 2 – Switch 10 p. 19 LCD Setting (Enable/Disable)

8) DIP 2 – Switches 1, 2, 3, 4 p. 20 CPU BUS Frequency Setting

9) DIP 2 – Switch 5 p. 20 Memory Transfer Mode Setting

10) DIP 2 – Switches 6, 7, 8 p. 21 CPU Core:BUS Frequnecy Multiple Setting

11) DIP 1 – Switches 6, 7, 8, 9, 10 p. 23 V oltage Regulator Output Selection

Expansion Slots/Sockets

1) DIMM Sockets p. 25 168-Pin DIMM Memory Expansion Sockets

2) CPU ZIF Socket 7 p. 27 Central Processing Unit (CPU) Socket

3) SLOT 1, SLOT 2 p. 29 16-bit ISA Bus Expansion Slots

4) PCI 1, PCI2, PCI3, PCI4 p. 29 32-bit PCI Bus Expansion Slots

*

The onboard hardware monitor uses the address 290H-297H so legacy ISA cards must not

use this address or else conflicts will occur.

*

Contents

III. H/W SETUP

External Connectors

1) PS2KB p. 31 AT Keyboard Connector (5-pin Female)

2) FLOPPY p. 31 Floppy Disk Drive Connector (6-pin Female)

3) PARALLEL p. 32 Parallel Port Connector (26-1 pins)

4) COM1/COM2 p. 32 Serial Port Connectors (Two 10-1 pins)

5) FAN p. 33 Cooling Fan Connectors (3 pins)

6) SMB p. 33 SMBus Connector (5-1 pins)

7) PRIMAR Y/SECOND. IDE p. 34 Primary/Secondary IDE Connector (Two 40-1 pins)

8) IDELED p. 34 IDE Activity LED (2 pins)

9) ATXPWR p. 35 ATX Power Supply Connector (20 pins)

10) PS2PWR p. 35 AT Power Supply Connector (12 pins)

11) USBMIR p. 36 USB, PS/2 Mouse, Infrared Module Connector (18-1 pins)

12) IR p . 36 IrDA-Compliant Infrared Module Connector (5 pins)

13) PWR (PANEL) p. 37 ATX Power Switch/Soft Power Switch Lead (2 pins)
IDELED (

14)

15)

PLED (

16) RESET (PANEL) p. 37 Reset Switch Lead (2 pins)

17) MLED (PANEL) p. 37 System Message LED (2 pins)
KEYLOCK (

18)

19) SPEAKER (PANEL) p. 37 Speaker Output Connector (4 pins)

20) WOLCON p. 38 Wake-On-LAN Activity Connector (3 pins)

PANEL

PANEL

PANEL

)

)

)

p. 37 IDE Activity LED Lead (2 pins)
p. 37 System Power LED Lead (2 pins)

p. 37 Keyboard Lock Switch Lead (2 pins)

ASUS P5S-B User’s Manual 13

III. H/W SETUP

Contents

III. HARDWARE SETUP

21) WOR p. 38 Wake-On-Ring Connector (2 pins)

22) AUX, CD1, CD2 p. 39 Stereo Audio In Connector (4 pins)

23) MODEM p. 39 Voice Modem In Connector (4 pins)

24) AUDIOCON p. 39 Audio Header (26-1 pins)

25) SCART p. 40 TV Out Connector (12-1 pin)

26) LCDHD p. 40 LCD Header (20-1 pins)

27) VGA Header p. 41 VGA Header (16 pins)

ASUS P5S-B User’s Manual14

III. HARDWARE SETUP

Hardware Setup Steps

1. Check Motherboard Settings

2. Install Memory Modules

3. Install the Central Processing Unit (CPU)

4. Install Expansion Cards

5. Connect Ribbon Cables, Cabinet Wires, and Power Supply

6. Setup the BIOS Software

1. Motherboard Settings

This section explains how to change your motherboard’s function settings through
the use of switches and/or 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 o r

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.

ASUS P5S-B User’s Manual 15

III. HARDWARE SETUP

1. Keyboard Power (Wake) Up (KB_UP)

This allows you to disable or enable the keyboard power or wake up function. Set
to Enable if you want to use your keyboard (by pressing <Spacebar>) to power or
wake up your computer. The default is set to Disable because not all computers
have the appropriate ATX power supply.

01

KBPWR

Motherboard Settings

III. H/W SETUP

P5S-B Keyboard Power Up

Motherboard Feature Settings (DIP Switches – DIP1 & DIP 2)

Some of the motherboard’s onboard functions can be adjusted through the DIP
switches. The white block represents the switch’s position. The following illustra­tion shows all the switches in the OFF position.

123

Disable

(Default)

OFFON

DIP 2

0 1

ON

123

Enable

<LCD Setting
<TV Out Setting
<Frequency Multiple
<Frequency Multiple
<Frequency Multiple
<Memory Transfer Mode
<Frequency Selection
<Frequency Selection
<Frequency Selection

12345678910

<Frequency Selection

P5S-B DIP Switches

ASUS P5S-B User’s Manual16

DIP 1

<VGA Frame Buffer

<Onboard VGA Setting

<Onboard Audio Setting

<VIO Setting

<VIO Setting

<VID Setting

<VID Setting

<VID Setting

ON

12345678910

<VID Setting

<VID Setting

ON

OFF

III. HARDWARE SETUP

2. VGA Frame Buffer Setting (DIP 1 – Switch 1)

This lets you select the display memory allocation mode. When Shared is se-
lected, the integrated graphics accelerator uses up to 8MB of system memory as
display memory . Local uses an optional dedicated onboard VGA memory (up to
8MB SDRAM).

0 1

DIP 1

Shared

ON

Local

ON

1 2345678910

1 2345678910

P5S-B VGA Frame Buffer Setting

3. Onboard VGA Setting (DIP 1 – Switch 2)

This lets you enable or disable the onboard AGP VGA. This may be disabled if
you are using a VGA card on the expansion slot.

0 1

DIP 1

Enable

(Default)

ON

1 2 345678910

Disable

ON

1 2 345678910

III. H/W SETUP

Motherboard Settings

P5S-B Onboard VGA Setting

ASUS P5S-B User’s Manual 17

III. HARDWARE SETUP

4. Onboard Audio Setting (DIP 1-Switch 3)

This lets you enable or disable the optional onboard 32-bit PCI audio. This should
be disabled if you are using an audio card on the expansion slot.

0 1

DIP 1

Enable

(Default)

ON

Disable

ON

.

P5S-B Audio Setting

Motherboard Settings

III. H/W SETUP

5. VIO Setting (DIP 1-Switches 4, 5)

The onboard voltage regulator allows you to select the voltage supplied to the
DRAM, chipset, AGP, and the CPU’s I/O buffer. IMPORTANT! Setting this
function switch to 3.6V or 3.8V may reduce system life. It is strongly recom­mended that you leave your switch on its default setting of 3.5V.

12345678910

0 1

12345678910

DIP 1

3.5Volt

(Default)

ON

12345678910

3.6Volt

ON

3.8Volt

ON

P5S-B Voltage I/O Setting

ASUS P5S-B User’s Manual18

12345678910

12345678910

III. HARDWARE SETUP

7. TV Out Setting (DIP 2 – Switch 9)

This lets you select the signal that is inputted to your TV when using the op­tional TV Out connector. Select AV for a composite input or RGB for an RGB
input. NOTE: This setting is available only on motherboards with the optional
SCART interface support.

0 1

DIP 2

AV

RGB

ON

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ON

12345678910

P5S-B TV Out (SCART) Setting

6. LCD Setting (DIP 2 – Switch 10)

If you want to connect an LCD monitor to your computer, you must set this
switch to Enable to use it. See LCD Header in External Connectors for con­nection information. NOTE: This setting is available only on motherboards with
the optional Digital Flat Panel (DFP) support.

0 1

DIP 2

Disable

(Default)

ON

12345678910

Enable

ON

12345678910

III. H/W SETUP

Motherboard Settings

P5S-B LCD Setting

ASUS P5S-B User’s Manual 19

III. HARDWARE SETUP

8. CPU BUS Frequency Setting (DIP 2 – Switches 1, 2, 3, 4)

This option tells the clock generator what frequency to send to the CPU, chipset,
and AGPset. This allows the selection of the CPU’ s External frequency (or BUS
Clock). The BUS Clock multiplied by the BUS Ratio equals the CPU's Internal
frequency (the advertised CPU speed). NOTE: You may set the memory speed
independently from the CPU Bus Frequency . Depending on your memory type,
PC66 (66MHz) ot PC100 (100MHz), select the appropriate “RAM” speed along
with the appropriate “CPU” speed.

9. Memory Transfer Mode Setting (DIP 2 – Switch 5)

The memory clock frequency can be set to be in asynchronous or asynchronous
mode with respect to the CPU bus frequency.

Motherboard Settings

III. H/W SETUP

P5S-B
CPU Bus Frequency Setting

DIP 2

12345678910

PCI

PCI

PCI

ON

66MHz
66MHz
33MHz

ON

100MHz
100MHz

33MHz

ON

66MHz

100MHz

33MHz

12345678910

12345678910

(SYNC)

CPU

SDRAM

0 1

(SYNC)

CPU

SDRAM

(ASYNC)

CPU

SDRAM

ON

75MHz
75MHz
37MHz

ON

105MHz
105MHz

35MHz

ON

75MHz

100MHz

37MHz

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12345678910

12345678910

ON

90MHz
90MHz
30MHz

ON

112MHz
112MHz

37MHz

ON

90MHz
60MHz
30MHz

12345678910

12345678910

12345678910

ON

95MHz
95MHz
32MHz

ON

95MHz
63MHz
32MHz

12345678910

12345678910

(ASYNC)

CPU

SDRAM

PCI

ON

100MHz

66MHz
33MHz

12345678910

ON

105MHz

70MHz
35MHz

12345678910

ON

112MHz

74MHz
37MHz

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ASUS P5S-B User’s Manual20

III. HARDWARE SETUP

10. CPU Core:BUS Frequency Multiple Setting (DIP 2 – Switches 6, 7, 8)

This option sets the frequency multiple between the CPU’s Internal frequency
and External frequency. These must be set in conjunction with the CPU BUS

Frequency Se tting.

DIP 2

0 1

CPU A
CPU B
CPU C
CPU D
CPU E

CPU F

→

3.5x(7/2)

→

1.5x(3/2)

→

3.5x(7/2)

→

3.0x(3/1)

→

3.5x(7/2)

→

4.0x(4/1)

ON

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3.33x(10/3)

ON

2.0x(2/1)

2.0x(2/1)

2.0x(2/1)

2.0x(2/1)

2.0x(2/1)

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2.5x(5/2)

2.5x(5/2)

2.5x(5/2)

1.0x(1/1)

2.5x(5/2)

2.0x(2/1)

ON

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3.0x(3/1)

3.0x(3/1)

3.0x(3/1)

3.0x(3/1)

3.0x(3/1)

ON

12345678910

—

P5S-B CPU
BUS Frequency Multiple

CPU A: AMD-K6-2, AMD-K6
CPU B: Intel Pentium P54C, AMD-K5
CPU C: Intel Pentium P55C, IBM/Cyrix

6x86MX, IBM/Cyrix M II

CPU D: IBM/Cyrix 6x86, IBM/Cyrix 6x86L
CPU E: IDT WinChip 2™
CPU F: IDT WinChip C6

CPU A
CPU B
CPU C
CPU D
CPU E

CPU F

→
→
→
→
→
→

ON

4.0x(4/1)
—
—
—

4.0x(4/1)

4.0x(4/1)

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4.5x(9/2)

4.5x(9/2)

4.0x(4/1)

ON

—
—
—

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ON

5.0x(5/1)

2.33x(7/3)

5.0x(5/1)

—
—
—

12345678910

ON

5.5x(11/2)

2.66x(8/3)

5.0x(5/1)

12345678910

—
—
—

See next page for a table of the CPU BUS Frequency and CPU Core:BUS Fre­quency Multiple Settings of supported CPUs.

III. H/W SETUP

Motherboard Settings

WARNING! Frequencies above 100MHz exceed the specifications for the on-
board 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.

ASUS P5S-B User’s Manual 21

III. HARDWARE SETUP

Set the DIP switches by t he internal speed of your CPU as follows:

(BUS Freq.) (Freq. Multiple)

DIP 2 DIP 2

CPU Model Freq. Mult. BUS F. 1234 67 8

AMD-K6-3/400 400MHz A-4.0x 100MHz

AMD-K6-2/450 450MHz A-4.5x 100MHz [ON] [ON] [OFF] [ON] [ON] [ON] [ON]
AMD-K6-2/400 400MHz A-4.0x 100MHz [ON] [ON] [OFF] [ON] [ON] [OFF] [ON]
AMD-K6-2/380 380MHz A-4.0x 95MHz [OFF] [OFF] [ON] [ON] [ON] [OFF] [ON]
AMD-K6-2/366 366MHz A-5.5x 66MHz [ON] [ON] [ON] [ON] [OFF] [OFF] [ON]
AMD-K6-2/350 350MHz A-3.5x 100MHz [ON] [ON] [OFF] [ON] [OFF] [OFF] [OFF]
AMD-K6-2/333 333MHz A-3.5x 95MHz [OFF] [OFF] [ON] [ON] [OFF] [OFF] [OFF]
AMD-K6-2/300 300MHz A-3.0x 100MHz [ON] [ON] [OFF] [ON] [OFF] [ON] [OFF]
AMD-K6-2/266 266MHz A-4.0x 66MHz [ON] [ON] [ON] [ON] [ON] [OFF] [ON]

Motherboard Settings

III. H/W SETUP

AMD-K6/300 300MHz A-4.5x 66MHz [ON] [ON] [ON] [ON] [ON] [ON] [ON]
AMD-K6/266 266MHz A-4.0x 66MHz [ON] [ON] [ON] [ON] [ON] [OFF] [ON]
AMD-K6/233 233MHz A-3.5x 66MHz [ON] [ON] [ON] [ON] [OFF] [OFF] [OFF]
AMD-K6/200 200MHz A-3.0x 66MHz [ON] [ON] [ON] [ON] [OFF] [ON] [OFF]
AMD-K6/166 166MHz A-2.5x 66MHz [ON] [ON] [ON] [ON] [ON] [ON] [OFF]

AMD-K5/133 100MHz B-1.5x 66MHz [ON] [ON] [ON] [ON] [OFF] [OFF] [OFF]
AMD-K5/100 100MHz B-1.5x 66MHz [ON] [ON] [ON] [ON] [OFF] [OFF] [OFF]

Intel Pentium P54C 166MHz B-2.5x 66MHz [ON] [ON] [ON] [ON] [ON] [ON] [OFF]
Intel Pentium P54C 133MHz B-2.0x 66MHz [ON] [ON] [ON] [ON] [ON] [OFF] [OFF]
Intel Pentium P54C 100MHz B-1.5x 66MHz [ON] [ON] [ON] [ON] [OFF] [OFF] [OFF]

[ON] [ON] [OFF] [ON] [ON] [OFF] [ON]

Intel Pentium P55C 233MHz C-3.5x 66MHz [ON] [ON] [ON] [ON] [OFF] [OFF] [OFF]
Intel Pentium P55C 200MHz C-3.0x 66MHz [ON] [ON] [ON] [ON] [OFF] [ON] [OFF]
Intel Pentium P55C 166MHz C-2.5x 66MHz [ON] [ON] [ON] [ON] [ON] [ON] [OFF]

IBM/Cyrix M II-PR333 270MHz C-3.0x 90MHz [ON] [OFF] [ON] [ON] [OFF] [ON] [OFF]
IBM/Cyrix M II-PR300 225MHz C-3.0x 75MHz [OFF] [ON] [ON] [ON] [OFF] [ON] [OFF]
IBM/Cyrix M II-PR300 233MHz C-3.5x 66MHz [ON] [ON] [ON] [ON] [OFF] [OFF] [OFF]

IBM/Cyrix 6x86MX-PR233 200MHz C-3.0x 66MHz [ON] [ON] [ON] [ON] [OFF] [ON] [OFF]
IBM/Cyrix 6x86MX-PR200 166MHz C-2.5x 66MHz [ON] [ON] [ON] [ON] [ON] [ON] [OFF]

IBM/Cyrix 6x86-PR166+* 133MHz D-2.0x 66MHz [ON] [ON] [ON] [ON] [ON] [OFF] [OFF]
IBM/Cyrix 6x86L-PR166+* 133MHz D-2.0x 66MHz [ON] [ON] [ON] [ON] [ON] [OFF] [OFF]

*The only IBM or Cyrix 6x86(L) (or M1) that is supported on this motherboard is revision 2.7 or later
(see next page).

ASUS P5S-B User’s Manual22

III. HARDWARE SETUP

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.

11. Voltage Regulator Output Selection (DIP 1 – Switches 6, 7, 8, 9, 10)

These jumpers set the VCORE voltage supplied to the CPU. Switching regula­tors allow some settings to be the same for two voltages of different power
planes.

WARNING! Because CPU designs change rapidly, the table on the following
page 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 CPU Vcore Voltage Selection
illustration.

0 1

P5S-B CPU
Vcore V oltage Selection

DIP 1

Inhibit

ON

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2.3Volts

ON

12345678910

2.6Volts

ON

12345678910

2.9Volts

ON

12345678910

3.2Volts

ON

12345678910

3.5Volts

ON

12345678910

2.1Volts

ON

12345678910

2.4Volts

ON

12345678910

2.7Volts

ON

12345678910

3.0Volts

ON

12345678910

3.3Volts

ON

12345678910

2.2Volts

ON

12345678910

2.5Volts

ON

12345678910

2.8Volts

ON

12345678910

3.1Volts

ON

12345678910

3.4Volts

ON

12345678910

III. H/W SETUP

Motherboard Settings

ASUS P5S-B User’s Manual 23

III. HARDWARE SETUP

DIP 1

Manufacturer CPU Type Single Plane Dual Plane 6 7 8 9 10

AMD (.25micron) K6-3/400 ---- 2.4V(Dual)

AMD (.25micron) K6-2/266,300,333, ---- 2.2V(Dual)

AMD K5 3.5V(VRE) ---­IBM/Cyrix 6x86 3.5V(VRE) ---- [OFF][ON] [ON] [ON][ON]
IDT WinChip2 3.5V(VRE) ---- [OFF] [ON] [ON] [ON] [ON]
Intel P54C/P54CS 3.5V(VRE) ---- [OFF] [ON] [ON] [ON] [ON]

AMD K5 3.4V(STD) ---- [OFF][ON] [ON] [ON] [OFF]
Intel P54C/P54CS 3.4V(STD) --- [OFF] [ON] [ON] [ON] [OFF]

AMD (.35micron) K6-233 ---- 3.2V(Dual) [OFF] [ON] [ON] [OFF] [OFF]

Motherboard Settings

III. H/W SETUP

AMD (.35micron) K6-166,200 ---- 2.9V(Dual) [OFF] [ON] [OFF] [OFF] [ON]
IBM/Cyrix 6x86MX ---- 2.9V(Dual) [OFF] [ON] [OFF] [OFF] [ON]

Intel P55C-MMX ---- 2.8V(Dual) [OFF] [ON] [OFF] [OFF] [OFF]

[OFF] [OFF] [ON] [OFF] [OFF]

K6-2/450

[OFF] [OFF] [OFF] [ON] [OFF]

366,380,400
K6/233,266,300

[OFF] [ON] [ON] [ON] [ON]

ASUS P5S-B User’s Manual24

III. HARDWARE SETUP

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 Ac-
cess 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 in Chipset Features Setup under BIOS SETUP.

Memory speed setup is recommended through SDRAM Configuration in Chipset
Features Setup under BIOS SETUP.

IMPORT ANT! (see Notes below)

• To make using bus speeds ≥95MHz possible, SDRAMs used must be com-

patible with the current Intel PC100 SDRAM specification..

Install memory in any combination as follows:

DIMM Location 168-pin DIMM Total Memory

DIMM1 (Rows 0&1) SDRAM 8, 16, 32, 64, 128, 256MB x1
DIMM2 (Rows 2&3) SDRAM 8, 16, 32, 64, 128, 256MB x1

DIMM3 (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.

• SDRAM chips are generally thinner and have higher pin density than EDO (Ex­tended Data Output) chips.

• BIOS shows SDRAM memory on bootup screen.

• Single-sided DIMMs are available in 16, 32, 64, 128MB; double-sided in 32, 64, 128,
256MB.

III. H/W SETUP

System Memory

ASUS P5S-B User’s Manual 25

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.

System Memory

III. H/W SETUP

III. HARDWARE SETUP

0 1

20 Pins 60 Pins 88 Pins

P5S-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

RFU

Buffered

Unbuffered

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.

Voltage Key Position

5.0V

Reserved

3.3V

ASUS P5S-B User’s Manual26

III. HARDWARE SETUP

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.

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.

CPU

III. H/W SETUP

IMPORTANT: You must set jumpers for “CPU to BUS Frequency Ratio” and
jumpers for “BUS Frequency Selection” depending on the CPU that you install.

0 1

Blank
Lever

Lock

P5S-B ZIF Socket 7

ASUS P5S-B User’s Manual 27

III. HARDWARE SETUP

(This page was intentionally left blank.)

ASUS P5S-B User’s Manual28

III. HARDWARE SETUP

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:

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.

III. H/W SETUP

Expansion Cards

ASUS P5S-B User’s Manual 29

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. T o install a PCI card, you need
to set something called the INT (interrupt) assignment. Since all the PCI slots on this

Expansion Cards

III. H/W SETUP

motherboard use an INT A #, be sure that the jumpers on your PCI cards are set to INT A.

Assigning DMA Channels for ISA Cards

III. HARDWARE SETUP

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 (in PNP AND P C I SETUP under BIOS SETUP, 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.

ASUS P5S-B User’s Manual30