Asus P I-AP6N User manual

R
P/I-AP6N
All-In-One Pentium Pro Motherboard
USER'S MANUAL

ASUS P/I-AP6N User's Manual
2
USER'S NOTICE
Product Name: ASUS P/I-AP6N
Manual Revision: 1.03
Release Date: April 1997
No part of this product, including the product and software may be reproduced,
transmitted, transcribed, stored in a retrieval system, or translated into any lan-
guage in any form by any means without the express written permission ofASUS-
TeK COMPUTER INC. (hereinafter referred to as ASUS) except documentation
kept by the purchaser for backup purposes.
Specifications are subject to change without notice. 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 shallASUS be liable for any loss or profits, loss of
business, loss of use or data, interruption of business, or for indirect, special, inci-
dental, or consequential damages of any kind, even if ASUS has been advised of
the possibility of such damages arising from any defect or error in this manual or
product. ASUS may revise this manual from time to time without notice.
Products mentioned in this manual are mentioned for identification purposes only.
Product names appearing in this manual may or may not be registered trademarks
or copyrights of their respective companies.
• 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.
• Sound Blaster AWE32 and SB16 are trademarks of Creative Technology Ltd.
• Adobe andAcrobat are registered trademarks of Adobe Systems Incorporated.
The product name and revision number are both printed on the board itself. Manual
revisions are released for each board 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 you may visit ASUS' home page at:
http://www.asus.com.tw/ or contact ASUS from the following page.
© Copyright 1997 ASUSTeK COMPUTER INC. All rights reserved.

ASUS P/I-AP6N User's Manual 3
ASUS CONTACT INFORMATION
ASUSTeK COMPUTER INC.
Marketing Info:
Address: 150 Li-Te Road, Peitou, Taipei, Taiwan, ROC
Telephone: [phone]
Fax: [phone]
Email: [email protected]
Technical Support:
Fax: [phone]
BBS: 886-2-896-4667
Email: [email protected]
WWW: http://www.asus.com.tw/
Gopher: gopher.asus.com.tw
FTP: ftp.asus.com.tw/pub/ASUS
ASUS COMPUTER INTERNATIONAL
Marketing Info:
Address: 721 Charcot Avenue, San Jose, CA 95131, USA
Telephone: [phone]
Fax: [phone]
Email: [email protected]
Technical Support:
BBS: 1-408-474-0555
Email: [email protected]
ASUS COMPUTER GmbH
Marketing Info:
Address: Harkort Str. 25, 40880 Ratingen, BRD, Germany
Telephone: [phone]
Fax: [phone]
Email: [email protected]
Technical Support:
BBS: 49-2102-448690
Email: [email protected]

ASUS P/I-AP6N User's Manual
4
CONTENTS
I. INTRODUCTION...........................................................................7
How this manual is organized ..................................................................... 7
Item Checklist ............................................................................................. 7
II. FEATURES ....................................................................................8
Features of the ASUS Motherboard ............................................................ 8
Parts of the ASUS Motherboard ........................................................... 9
III. INSTALLATION ........................................................................10
Map of the ASUS Motherboard ................................................................ 10
Installation Steps ....................................................................................... 12
1. Jumpers ................................................................................................. 12
Jumper Settings ............................................................................ 13
2. System Memory ................................................................................... 18
SIMM Memory Installation Procedures: ...................................... 19
VGA Memory Upgrade ................................................................ 20
3. Central Processing Unit (CPU) ............................................................ 21
4. Expansion Cards................................................................................... 22
Expansion Card Installation Procedure: ....................................... 22
Assigning IRQs for Expansion Cards........................................... 22
Assigning DMA Channels for ISA Cards..................................... 23
5. External Connectors ............................................................................. 24
Power Connection Procedures ............................................................ 31
IV. BIOS SOFTWARE .....................................................................32
Support Software....................................................................................... 32
Flash Memory Writer Utility..................................................................... 32
Main Menu ................................................................................... 32
Advanced Features Menu ............................................................. 33
Managing & Updating your Motherboard's BIOS.............................. 34
6. BIOS Setup........................................................................................... 35
Load Defaults ............................................................................... 36
Standard CMOS Setup ........................................................................ 36
Details of Standard CMOS Setup:................................................ 37
BIOS Features Setup........................................................................... 40
Details of BIOS Features Setup.................................................... 40
Chipset Features Setup........................................................................ 43
Details of Chipset Features Setup................................................. 43
Power Management Setup .................................................................. 46
Details of Power Management Setup ........................................... 46
PNP and PCI Setup ............................................................................. 48
Details of PNP and PCI Setup ...................................................... 48
Load BIOS Defaults............................................................................ 50
Load Setup Defaults............................................................................ 50
Supervisor Password and User Password ........................................... 51
IDE HDD Auto Detection................................................................... 52
Save and Exit Setup ............................................................................ 53
Exit Without Saving ............................................................................ 53
V. DESKTOP MANAGEMENT......................................................55
Desktop Management Interface (DMI) ..................................................... 55
Introducing the ASUS DMI Configuration Utility ....................... 55
System Requirements ................................................................... 55
Using the ASUS DMI Configuration Utility ................................ 56
Notes:............................................................................................ 56

ASUS P/I-AP6N User's Manual 5
CONTENTS
R
ATI VGA Series .................................................................59
VI. Microsoft Windows 95 ................................................................61
Video Driver Installation ........................................................................... 61
Software MPEG & Video Player ........................................................ 65
Windows 95 Display Settings ................................................................... 66
VII. Microsoft Windows 3.x..............................................................67
Video Driver Installation ........................................................................... 67
Software MPEG & Video Player .............................................................. 69
ATI Desktop Control Panel ................................................................. 70
ATI Desktop Features ......................................................................... 70
FlexDesk+ ................................................................................................. 71
FlexDesk+ Basic Settings ................................................................... 71
FlexDesk+ Advanced Settings ............................................................ 73
DPMS (for Windows) ............................................................................... 74
Timer Settings ..................................................................................... 74
Buttons ................................................................................................ 74
DeskScape ................................................................................................. 75
DeskScape Functions .......................................................................... 75
Buttons ................................................................................................ 76
WinSwitch ................................................................................................. 76
Screen Adjustment .............................................................................. 77
DPMS Parameters ............................................................................... 79
VIII. Windows Video Player.............................................................80
ATI Player and control panel (Win3.1x and Win95) .......................... 80
Features ............................................................................................... 80
Video Acceleration Performance ........................................................ 81
Playing Video Clips ............................................................................ 81
Sizing Windows .................................................................................. 81
IX. Microsoft Windows NT...............................................................82
Video Driver Installation ........................................................................... 82
X. IBM OS/2 & OS/2 Warp ..............................................................86
Video Driver Installation ........................................................................... 86
XI. Other Video Drivers....................................................................87
AutoCAD Video Driver Installation ......................................................... 87
Microstation Video Driver Installation ..................................................... 88
Select System Information (optional) ....................................................... 89
Quick Setup (optional) .............................................................................. 89
VDIF Files (optional).......................................................................... 90
Advanced Setup (optional)........................................................................ 91
A. Troubleshooting ............................................................................93
Diagnostics ................................................................................................ 93
Troubleshooting ........................................................................................ 93
System Lockup.......................................................................................... 93

ASUS P/I-AP6N User's Manual
6
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 installa-
tion. 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 inter-
ference 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: Theuseof shielded cablesforconnectionof the monitortothe graphics
card is required to assure compliance with FCC regulations. Changes or modifica-
tions 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 Cana-
dian Department of Communications.

ASUS P/I-AP6N User’s Manual 7
How this manual is organized
This manual is divided into the following sections:
I. Introduction: Manual information and checklist
II. Features: Information and specifications concerning this product
III. Installation: Instructions on setting up the motherboard.
IV. BIOS Setup: BIOS software setup information.
V. DMI Utility: BIOS supported Desktop Management Interface
VI. VGA Drivers: ATI VGA Drivers and Utilities
Item Checklist
Please check that your package is complete. If you discover damaged or missing
items, please contact your retailer.
√The ASUS P/I-AP6N motherboard
√1 IDE ribbon cable
√1 floppy ribbon cable
√Support drivers and utilities as follows (view FILELIST.TXT for details)
• Flash Memory Writer utility to update the FLASH BIOS
• Desktop Management Interface (DMI) utility
• Bus Master IDE Drivers for various operating systems
• Readme files for descriptions and use of the files
• Technical Support Form
• ATI Video drivers and utilities (CD)
• Creative Labs Audio drivers and utilities (CD)
√This user's manual with VGA driver installation
√Creative Labs ViBRA 16C Series Audio Manual
Optional infrared module
Optional ASUS PCI-SC200 Fast-SCSI card
I. INTRODUCTION
I. INTRODUCTION
(Manual / Checklist)

8 ASUS P/I-AP6N User’s Manual
Features of the ASUS Motherboard
The ASUS P/I-AP6N is specially designed for the demanding PC user who wants a
high-performance multi-media motherboard in a single package. This motherboard:
•Multi-Speed Support: Supports one 150-200MHz Pentium Pro CPU on a
ZIF Socket 8.
•Intel Chipset: Features Intel's 440FX PCIset with I/O subsystems.
•EasyInstallation: Is equipped with BIOS that supports auto detection of hard
drives, PS/2 mouse, and Plug and Play devices to make setup of hard drives,
expansion cards, and other devices virtually automatic.
•Error Checking and Correcting (ECC): Using Intel’s 440FX PCIset to-
gether with parity DRAM modules can detect multi-bit memory errors and
correct 1-bit memory errors.
•DesktopManagementInterface(DMI): SupportsDMIthroughBIOS which
allows hardware to communicate within a standard protocol creating a higher
level of compatibility. (Requires DMI-enabled components.) (See section V)
•Internal L2 Cache Support: Supports Intel CPU’s built in 256KB/512KB
(depending on CPU) Level 2 cache so that no external SRAM chips are needed.
•VersatileDRAM Memory Support: Supports 72-pin SIMMs of 4MB, 8MB,
16MB, 32MB or 64MB to form a memory size between 8MB to 384MB. Sup-
ports both Fast Page Mode (FPM) and Extended Data Output (EDO) SIMMs.
•RiserExpansionSlot: Supportsslotexpansionthrougha daughter card (called
a Riser card) with ISA and/or PCI slots (provided by retailer)
•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. Two
floppy drives of either 5.25" or 3.5" (1.44MB or 2.88MB) are also supported
without an external card. The Japanese "Floppy 3 mode" (3.5" 1.2MB)
floppy standard is also supported.
•PCI Bus Master IDE Controller: Comes with an onboard PCI Bus Master
IDE controller with two connectors that supports four IDE devices in two chan-
nels, provides faster data transfer rates, and supports Enhanced IDE devices
suchasTape BackupandCD-ROMdrives. Thiscontroller supports PIO Modes
3 and 4 and Bus Master IDE DMA Mode 2. BIOS now supports IDE CD-
ROM or SCSI bootup.
•Ready-to-Use Connectors: Is equipped with onboard Monitor, Parallel
(Printer) Port, Serial Ports (COM1&2), PS/2 Mouse, and PS/2 Keyboard con-
nectors without the need for extra cables and brackets.
•Multi-Media Ready: Includes Creative Labs 16CLAudio and ATI Mach64
3D RAGE II VGAwith 3D enhancement onboard.
II. FEATURES
(Features)
II. FEATURES

ASUS P/I-AP6N User’s Manual 9
•UpgradeableVideoMemory: Includes 2MB DRAMonboard and upgradeable
to 4MB DRAM.
•Optional IrDA Connector: Supports an optional infrared port module for
wireless interface.
•SCSIBIOS: HasfirmwarethatsupportsoptionalASUS SCSI controller cards.
Parts of the ASUS Motherboard
II. FEATURES
II. FEATURES
(Parts of Board)
Intel's 440FX
PCIset
CPU ZIF Socket 8
IDE Connectors
Riser Slot
Monitor
Programmable
Flash ROM
Multi-I/O & RTC
(6) 72-pin SIMM
DRAM Sockets
Parallel COM 2 COM 1 PS/2
Mouse PS/2 Keyboard
Audio Port
USB Connector
(Reserved)
AMC Connector
Floppy Connector
Audio Wave
Table Upgrade
VGAMemory
Upgrade Sockets

10 ASUS P/I-AP6N User’s Manual
III. INSTALLATION
Map of the ASUS Motherboard
Primary IDE
Secondary IDE
Raiser Card Connector
Board Power Input
P8 P9
Floppy Drives
IDE LED
Audio (En/Dis)
PS/2
Keyboard
PS/2
Mouse
Parallel Connector Serial COM1
Serial COM2
VGA Output
Audio Connector
USB
512KB DRAM
Upgrade Socket
512KB DRAM
Upgrade Socket
AMC Connector
SIMM Socket 1 (Bank 0) SIMM Socket 2 (Bank 0) SIMM Socket 3 (Bank 1) SIMM Socket 4 (Bank 1) SIMM Socket 5 (Bank 2) SIMM Socket 6 (Bank 2)
Wave Table Upgrade
CR2032
3 Volts
Lithium
Button Cell
CPU ZIF Socket 8
Panasonic CD In
Mitsumi CD In
Sony CD In
Panel Connectors
Infrared
RTCLR
BBLKW
FS0 FS1
BUS FREQ
FANPWR1 FANPWR2
CHASSIS
Creative
Labs
ViBRA
Audio
ATI 3D Rage II
Video Chipset
Intel 440FX
PCIset
Intel PIIX3
PCIset
Flash ROM
for BIOS
Intel 440FX
PCIset
Freq. Ratio
BF2
BF0
BF1
BF3
CPU Voltage
VID2
VID0
VID1
VID3
Volume Control
Gnd
Up
Down
Gnd
Gnd
JP2
Super
Multi-I/O
R
FANPWR3
JP3
512KB DRAM
Upgrade Socket
512KB DRAM
Upgrade Socket
512KB DRAM
512KB DRAM
512KB DRAM
512KB DRAM
512KB DRAM
512KB DRAM
(Map of Board)
III. INSTALLATION

ASUS P/I-AP6N User’s Manual 11
III. INSTALLATION
Jumpers
1) BBLKW p. 13 Flash ROM Boot Block Program (Enable/Disable)
2) RTCLR p. 14 Real Time Clock RAM (Operation/Clear CMOS Data)
3) AUDIO_JP p. 15 Audio Selection (Enabled/Disabled)
4) FS0, FS1 p. 16 CPU External Clock (BUS) Frequency Selection
5) BF0, BF1, BF2, BF3 p. 16 CPU:BUS Frequency Ratio
6) VID0 - VID3 p. 17 Voltage Regulator Output Selection
Expansion Slots
1) SIMM Sockets p. 18 DRAM Memory Expansion Sockets
2) CPU ZIF Socket 8 p. 21 Central Processing Unit (CPU) Socket
3) Riser Slot p. 22 Slot for a Riser Expansion Slot Card
Connectors
1) PS2KB p. 24 PS/2 Keyboard Connector (6-pin Female)
2) PS2MOUSE p. 24 PS/2 Mouse Connector (6-pin Female)
3) COM1, COM2 p. 24 Serial Port COM1 & COM2 (9-pin Male)
4) PRINTER p. 25 Parallel (Printer) Port Connector (25-pin Female)
5) Video Monitor Output p. 25 Video Connector for Video Monitor (15-pin Female)
6) FLOPPY p. 25 Floppy Drive Connector (34-pin Block)
7) IDE1, IDE2 p. 26 Primary / Secondary IDE Connector (40-pin Blocks)
8) IDELED p. 26 IDE LED Activity Light
9) TB LED (PANEL) p. 27 Turbo LED/Power LED (2-pins)
10) SMI (PANEL) p. 27 SMI Switch Lead (2-pins)
11) RESET (PANEL) p. 27 Reset Switch Lead (2-pins)
12) KEYLOCK (PANEL) p. 27 Keyboard Lock Switch Lead (5-pins)
13) SPEAKER (PANEL) p. 27 Speaker Connector (4-pins)
14) IR p. 28 Infrared Port Module Connector
15) VOL_CON p. 28 Digital Volume Control (Up/Down)
16) FANPWR1, 2, 3 p. 29 1CPU,2PowerSupply,3ChassisFanPowerLeads(6-pinBlock)
17) CHASSIS p. 29 Chassis Open Alarm Lead (3-pin Block)
18) Power Input p. 30 Motherboard Power Connector (12-pin Block)
(Map of Board)
III. INSTALLATION

12 ASUS P/I-AP6N User’s Manual
III. INSTALLATION
Installation Steps
Before using your computer, you must follow the six steps as follows:
1. Set Jumpers on the Motherboard
2. Install DRAM Modules
3. Install the CPU
4. Install Expansion Cards
5. Connect Cables, Wires, and Power Supply
6. Setup the BIOS Software
1. Jumpers
Several hardware settings are made through the use of jumper caps to connect jumper
pins (JP) on the motherboard. See "Map of the Motherboard" on page 4 for loca-
tions of jumpers. The jumper settings will be described numerically such as [----],
[1-2], [2-3] for no connection, connect pins 1&2, and connect pins 2&3 respec-
tively. Pin 1 for our motherboards is always on top
Pin 1
or on the left
Pin 1
when
holding the motherboard with the keyboard connector away from yourself. A"1" is
written besides pin 1 on jumpers with three pins. The jumpers will also be shown
graphically such as to connect pins 1&2 and to connect pins 2&3.
Jumpers with two pins will be shown as for short (On) and for open (Off).
For manufacturing simplicity, the jumpers may be sharing pins from other groups.
Use the diagrams in this manual instead of following the pin layout on the board.
Settings with two jumper numbers require that both jumpers be moved together. To
connect the pins, simply place a plastic jumper cap over the two pins as diagramed.
WARNING: Computer motheboards and components contain very delicate
Integrated Circuit (IC) chips. To protect the motherboard and other compo-
nents against damage from static electricity, you should follow some precau-
tions whenever you work on your computer.
1. Unplug your computer when working on the inside.
2. Hold components by the edges and try not to touch the IC chips, leads, or
circuitry.
3. Use a grounded wrist strap before handling computer 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.
(Jumpers)
III. INSTALLATION

ASUS P/I-AP6N User’s Manual 13
III. INSTALLATION
Jumper Settings
1. Flash ROM Boot Block Programming (BBLKW)
This sets the operation mode of the boot block area of the BIOS Flash ROM to
allow programming in the Enabled position.
Programming BBLKW
Disabled [1-2] (Default)
Enabled [2-3]
R
Boot Block Programming (Disable / Enable)
Disabled / Protected
(Default) Enabled
1
2
3
1
2
3
BBLKW BBLKW
III. INSTALLATION
(Jumpers)

14 ASUS P/I-AP6N User’s Manual
III. INSTALLATION
(Jumpers)
III. INSTALLATION
2. Real Time Clock (RTC) RAM (RTCLR)
The CMOS RAM is powered by the onboard button cell battery. To clear the
RTC data: (1) Turn off your computer, (2) Move this jumper to “Clear Data,”
(3) Power on your computer, (4) Turn off your computer, (5) Move the jumper
back to “Operation,” (6)Turn on your computer, (7) Holddown <Delete> during
bootup and enter BIOS setup to re-enter user preferences.
Battery Test Jumper (RTCLR)
You can test the battery’s current by removing this jumper and attaching a cur-
rent meter to pins 2&3. WARNING: You must unplug the power cord to
your power supply to ensure that there is no power to your motherboard.
The CMOS RAM containing BIOS setup information may be cleared by
this action. You should enter BIOS to “Load Setup Defaults” and re-enter
any user information after removing and reapplying this jumper.
RTC RAM RTCLR
Operation [2-3] (Default)
Clear Data [1-2] (momentarily)
R
Real Time Clock RAM (Operation / Clear CMOS Data)
Clear CMOS DataOperation
(Default)
RTCLR
1
2
3
1
2
3
RTCLR

ASUS P/I-AP6N User’s Manual 15
III. INSTALLATION
(Jumpers)
III. INSTALLATION
3. OnboardAudio Selection (AUDIO_JP)
This jumper allows you to Disable the onboard audio chipset in order to use
your own audio card. Otherwise, leave on default of Enabled.
Onboard Audio AUDIO_JP
Enabled [1-2] (Default)
Disabled [2-3]
R
Onboard Audio Selection (Enable / Disabled)
Enabled
(Default) Disabled
1
2
3
1
2
3
AUDIO_JP AUDIO_JP

16 ASUS P/I-AP6N User’s Manual
III. INSTALLATION
4. CPU External (BUS) Frequency Selection (FS0, FS1)
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).
5. CPU to BUS Frequency Ratio (BF0, BF1, BF2, BF3)
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 together with the above jumpers CPU External (BUS) Frequency
Selection.
R
CPU External Clock (BUS) Frequency Selection
FS1 FS0 FS1 FS0 FS1 FS0 FS1 FS0
60MHz 66MHzReserved Reserved
CPU : BUS Frequency Ratio (2.0x, 2.5x, 3.0x, 3.5x, 4.0x)
3.5 x2.0 x 2.5 x 3.0 x 4.0 x
BF0
BF1
BF2
BF3
BF0
BF1
BF2
BF3
BF0
BF1
BF2
BF3
BF0
BF1
BF2
BF3
BF0
BF1
BF2
BF3
Set the jumpers by the Internal speed of the Intel CPU as follows:
(BUS Freq.) (CPU to BUS Freq. Ratio)
Freq. Ratio BUS Freq. FS1 FS0 BF0 BF1 BF2 BF3
200MHz 3.0x 66MHz [1-2] [2-3] [ON] [OFF] [ON] [ON]
180MHz 3.0x 60MHz [2-3] [1-2] [ON] [OFF] [ON] [ON]
166MHz 2.5x 66MHz [1-2] [2-3] [OFF] [ON] [ON] [ON]
150MHz 2.5x 60MHz [2-3] [1-2] [OFF] [ON] [ON] [ON]
(Jumpers)
III. INSTALLATION

ASUS P/I-AP6N User’s Manual 17
III. INSTALLATION
(Jumpers)
III. INSTALLATION
6. Voltage Regulator Output Selection (VID0 -VID3)
Pentium Pro Processors may require different voltages. Current processors
(marked “Pentium Pro”) support VID and will automatically adjust the voltage
regulator so that no jumper settings are needed (leave these jumpers open in this
case). Older processors withoutVID support require manual voltage ID setting.
Use [S] for Short and [O] for Open.
Voltage 3.5 3.4 3.3 3.2 3.1 3.0 2.9 2.8 2.7 2.6 2.5 2.4 2.3 2.2 2.1 Auto
VID 0 [S] [O] [S] [O] [S] [O] [S] [O] [S] [O] [S] [O] [S] [O] [S] [O]
VID 1 [S] [S] [O] [O] [S] [S] [O] [O] [S] [S] [O] [O] [S] [S] [O] [O]
VID 2 [S] [S] [S] [S] [O] [O] [O] [O] [S] [S] [S] [S] [O] [O] [O] [O]
VID 3 [S] [S] [S] [S] [S] [S] [S] [S] [O] [O] [O] [O] [O] [O] [O] [O]
R
Voltage Regulator Output Selection
VID0
VID1
VID2
VID3
AUTO
(Default)

18 ASUS P/I-AP6N User’s Manual
III. INSTALLATION
III. INSTALLATION
(System Memory)
2. System Memory
This motherboard supports six 72-pin SIMMs (Single Inline Memory Modules) of
4MB,8MB,16MB, 32MB, or 64MBtoform a memory size between8MBto 384MB.
The DRAM can be either 60ns or 70ns Fast Page Mode (FPM) (Asymmetric or
Symmetric), Extended Data Out (EDO), or Burst Extended Data Out (BEDO).
SIMMs must be installed in pairs so that each bank contains two of the same size
memory modules. Maximum memory size of each memory bank must be 128MB
or less. To support Error Checking and Correcting (ECC), you must use true (op-
posed to phantom parity generated by TTL chips) 36-bit parity-type SIMM (e.g. 8
chips + 4 parity chips ) in pairs for all modules. Mixing 32-bit non-parity SIMM (e.
g. 8 chips) and 36-bit SIMM (e.g. 12 chips) will work minus the ECC feature.
IMPORTANT: Memory speed setup is required in BIOS Chipset Setup "Auto
Configuration."
Install memory in any or all of the banks in any combination as follows:
Bank Memory Module Total Memory
Bank 0 4MB, 8MB, 16MB, 32MB, 64MB x2
SIMM Sockets 1&2 72-pin FPM, EDO, BEDO SIMM
Bank 1 4MB, 8MB, 16MB, 32MB, 64MB x2
SIMM Sockets 3&4 72-pin FPM, EDO, BEDO SIMM
Bank 2 4MB, 8MB, 16MB, 32MB, 64MB x2
SIMM Sockets 5&6 72-pin FPM, EDO, BEDO SIMM
Total System Memory (Max 384MB) =
IMPORTANT: The same size and type (FPM, EDO, BEDO) of memory must
be installed in pairs so that memory modules are not mixed in each bank. Do
not use memory modules with more than 24 chips per module. Modules with
more than 24 chips exceed the design specifications of the memory subsystem
and will be unstable.

ASUS P/I-AP6N User’s Manual 19
III. INSTALLATION
SIMM Memory Installation Procedures:
1. The SIMM memory modules will only fit in one orientation as shown because
of a "Plastic Safety Tab" on one end of the SIMM slots which requires the
"Notched End" of the SIMM memory modules.
72 Pin SIMM DRAM Sockets
Notched End
1234
Bank 0 Bank 1
R
65
Bank 2
2. Press the memory module firmly into place starting from a 45 degree angle
making sure that all the contacts are aligned with the socket.
3. With your finger tips, rock the memory module into a vertical position so that it
clicks into place.
Metal Clip
Plastic Safety Tab (This Side Only) Mounting Hole
72
Pi
n
DRAM
i
n
SIMM
S
oc
k
et
4. The plastic guides should go through the two "Mounting Holes" on the sides and
the "Metal Clips" should snap on the other side.
5. To release the memory module, squeeze both "Metal Clips" outwards and rock
the module out of the "Metal Clips".
(System Memory)
III. INSTALLATION

20 ASUS P/I-AP6N User’s Manual
III. INSTALLATION
VGA Memory Upgrade
TheASUS P/I-AP6N motherboard comes with 2MB DRAM for the onboard VGA.
Four sockets are available to upgrade the VGA memory to 4MB by adding four
512KB DRAM chips. 3MB is not supported on this product. Specifications may
change without notice.
Onboard VGA DRAM Specification:
40 pins SOJ, 256Kx16, DUAL CAS EDO DRAM 40ns
Suggested VGADRAM for P/I-AP6N:
1. TM T224162A-40JE
2. EtronTech Em614163A-40
Small indentation on the chip's sloped edge
Socket's cut corner
This is an example of an installed DRAM. The indentation is made white for vis-
ibility, it is normally black.
1. Match the small indentation on the chip’s sloped edge with the socket’s cut corner.
2. Place the chip flat and evenly into the socket and press firmly but carefully so that
the chip enters evenly. When installed, the chip should be flush with the socket.
WARNING: Installing the memory chip incorrectly may damage the memory
and the product itself.
IMPORTANT: Make sure that all VGA memory are of the same type and speed to
ensure reliable operation.
III. INSTALLATION
(System Memory)