ASUS PI-XP55TVP4 User Manual

R

P/I-XP55TVP4

Pentium A TX Motherboard

USER'S MANUAL

USER'S NOTICE

No part of this product, including the product and software may be reproduced,
transmitted, transcribed, stored in a retrieval system, or translated into any lan­guage in any form by any means without the express written permission of ASUST eK
COMPUTER INC. (hereinafter referred to as ASUS) except documentation kept
by the purchaser for backup purposes.

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 be liable for
any loss or profits, loss of business, loss of use or data, interruption of business, or
for indirect, special, incidental, 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.

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 updated BIOS, drivers, or prod­uct release information you may visit ASUS' home page at: http://www .asus.com.tw/

© Copyright 1996 ASUSTeK COMPUTER INC. All rights reserved.

Product Name: ASUS P/I-XP55TVP4
Manual Revision: 1.01
Release Date: January 1997

II

ASUS P/I-XP55TVP4 User's Manual

ASUS CONTACT INFORMATION

ASUSTeK COMPUTER INC.

Marketing Info:

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

Technical Support:

Fax: [phone]
BBS: 886-2-896-4667
Email: [e-mail]
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: [e-mail]

Technical Support:

BBS: 1-408-474-0555
Email: [e-mail]

ASUS COMPUTER GmbH

Marketing Info:

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

Technical Support:

BBS: 49-2102-448690
Email: [e-mail]

ASUS P/I-XP55TVP4 User's Manual III

CONTENTS

I. INTRODUCTION...........................................................................1

How this manual is organized..........................................................1

Item Checklist ..................................................................................1

II. FEATURES ....................................................................................2

Features of the ASUS Motherboard.................................................2

Parts of the ASUS Motherboard.................................................3

III. INSTALLATION ..........................................................................4

Map of the ASUS Motherboard .......................................................4

Installation Steps..............................................................................6

1. Jumpers ........................................................................................6

Jumper Settings ....................................................................7

Compatible Cyrix CPU Identification ................................ 11

2. System Memory (DRAM & SRAM)........................................12

DRAM Memory Installation Procedures: ..........................13

Static RAM (SRAM) for Level 2 (External) Cache ...........14

Compatible Cache Modules for this Motherboard .............14

3. Central Processing Unit (CPU).................................................15

4. Expansion Cards .......................................................................16

Expansion Card Installation Procedure: .............................16

Assigning IRQs for Expansion Cards.................................16

Assigning DMA Channels for ISA Cards...........................17

5. External Connectors..................................................................19

Power Connection Procedures .................................................25

IV. BIOS SOFTWARE .....................................................................26

Support Software ...........................................................................26

Flash Memory Writer Utility .........................................................26

Main Menu .........................................................................26

Advanced Features Menu ...................................................27

Updating your Motherboard's BIOS ........................................28

6. BIOS Setup ...............................................................................29

Load Defaults .....................................................................30

Standard CMOS Setup .............................................................30

Details of Standard CMOS Setup:......................................31

BIOS Features Setup ................................................................34

Details of BIOS Features Setup..........................................34

Chipset Features Setup .............................................................37

Details of Chipset Features Setup.......................................37

IV

ASUS P/I-XP55TVP4 User's Manual

CONTENTS

Power Management Setup........................................................40

Details of Power Management Setup .................................40

PNP and PCI Setup ..................................................................42

Details of PNP and PCI Setup ............................................42

Load BIOS Defaults .................................................................44

Load Setup Defaults .................................................................44

Supervisor Password and User Password ................................45

IDE HDD Auto Detection ........................................................46

Save and Exit Setup .................................................................47

Exit Without Saving .................................................................47

V. DESKTOP MANAGEMENT......................................................49

Desktop Management Interface (DMI)..........................................49

Introducing the ASUS DMI Configuration Utility .............49

System Requirements .........................................................49

Using the ASUS DMI Configuration Utility ......................50

Notes:..................................................................................50

VI. ASUS PCI-SC200 SCSI Card....................................................53

NCR SCSI BIOS and Drivers ........................................................53

The ASUS PCI-SC200 SCSI Interface Card .................................54

Setting Up the ASUS PCI-SC200 ............................................54

Setting the INT Assignment .....................................................55

Terminator Settings ..................................................................55

SCSI ID Numbers ....................................................................56

VII. DOS 3.1 & Windows 3.1x Audio Software

(with optional I-A16C Audio Card Bundle Only)

VIII. Windows 95 Audio Software

(with optional I-A16C Audio Card Bundle Only)

ASUS P/I-XP55TVP4 User's Manual V

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.

VI

ASUS P/I-XP55TVP4 User's Manual

I. INTRODUCTION

How this manual is organized

This manual is divided into the following sections:

I. Introduction: Manual information and checklist
II. Features: Information and specifications
III. Installation: Instructions on setting up the motherboard
IV. BIOS Setup: BIOS software setup information
V. ASUS DMI Utility: BIOS supported Desktop Management Interface
VI. ASUS PCI-SC200: Installation of an optional SCSI card
VII. ASUS I-A16C: Installation of an optional Audio card
VIII. DOS/Win3.1x: Audio Software Manual (with I-A16C bundle only)
IX. Windows 95: Audio Software Manual (with I-A16C bundle only)

Item Checklist

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

I. INTRODUCTION

(Manual / Checklist)

√ The ASUS P/I-XP55TVP4 motherboard
√ 1 IDE ribbon cable
√ 1 floppy ribbon cable
√ 1 serial cable & bracket set
√ 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

• Audio drivers and utilities (included with I-A16C bundle only)

• Readme files for descriptions and use of the files

• Technical Support Form

√ This user's manual (audio sections included with I-A16C bundle only)

Optional infrared module
Optional ASUS PCI-SC200 Fast-SCSI card
Optional ASUS I-A16C Audio Card

ASUS P/I-XP55TVP4 User’s Manual 1

II. FEATURES

(Features)

II. FEATURES

Features of the ASUS Motherboard

The ASUS P/I-XP55TVP4 is carefully designed for the demanding PC user who
wants many features in a small package. This motherboard:

• Easy Installation: 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.

• Multi-Processor/Multi-Speed Support: Supports one Intel P54C Pentium

(75-200MHz), Intel P55C Pentium (200MHz), Cyrix P166+ (Rev 2.7 or later),
or AMD-K5 (PR75-133MHz) (See page 10).

• Intel Chipset: Features Intel's 430VX PCIset with I/O subsystems.

• 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)

• L2 Cache: Provides the option of 0KB upgradeable to 256KB or 512KB, on-

board 256KB upgradeable to 512KB, or 512KB onboard Pipelined Burst SRAM.
Upgrades are made through a Synchronous SRAM cache module. (See page

14 for compatible cache modules.)

• Versatile DRAM Memory Support: Supports 72-pin SIMMs of 4MB, 8MB,

16MB, or 32MB to form a memory size between 8MB to 128MB. Supports both
Fast Page Mode (FPM) and Extended Data Output (EDO) SIMMs. (see p. 12)

• ISA & PCI Expansion Slots: Provides four 16-bit ISA & four 32-bit PCI slots.

• 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. T wo 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 chan­nels, provides faster data transfer rates, and supports Enhanced IDE devices
such as T ape Backup and CD-ROM drives. This controller supports PIO Modes
3 and 4 and Bus Master IDE DMA Mode 2. BIOS now supports IDE CD-

ROM or SCSI bootup.

• Optional IrDA Connector: Has an optional ribbon & bracket set to support an

optional infrared port module for wireless interface.

• NCR SCSI BIOS: This motherboard has firmware that supports the optional

ASUS PCI-SC200 SCSI controller cards.

2 ASUS P/I-XP55TVP4 User’s Manual

II. FEATURES

Parts of the ASUS Motherboard

T: USB Port 1
B: USB Port 2

PS/2 Keyboard

PS/2 Mouse

Parallel Conn.

COM 2
Intel's 430VX
PCIset

COM 1

4 SIMM Slots

CPU ZIF Socket 7

256/512KB Pipelined
Burst L2 Cache

Floppy Drive Connector

IDE 2 Connector

IDE 1 Connector

II. FEATURES

(Parts of Board)

4 PCI Slots

4 ISA Slots

BIOS Flash ROM

ASUS P/I-XP55TVP4 User’s Manual 3

Map of the ASUS Motherboard

III. INSTALLATION

(Map of Board)

III. INSTALLATION

4 ASUS P/I-XP55TVP4 User’s Manual

III. INSTALLATION

Jumpers

1) L2SIZE p. 7 Total Level 2 Cache Size Setting (512KB/256KB)

2) BBLKW p. 8 Flash ROM Boot Block Program (Disable/Enable)

3) RTCLR p. 9 Real Time Clock RAM (Operation/Clear Data)

4) FS0, FS1, FS2 p. 10 CPU External Clock (BUS) Frequency Selection

5) BF0, BF1 p. 10 CPU:BUS Frequency Ratio

6) VID p. 11 CPU Voltage Regulator Output Selection

Expansion Slots

1) SIMM Sockets p. 12 72-Pin SIMM Memory Expansion Sockets

2) L2 Cache p. 14 Level 2 Cache Expansion Slot

3) CPU ZIF Socket 7 p. 15 Central Processing Unit (CPU) Socket

4) ISA Slots p. 16 16-bit ISA Bus Expansion Slots

5) PCI Slots p. 16 32-bit PCI Bus Expansion Slots

Connectors

1) PS2KEYBOARD p. 19 PS/2 Keyboard Connector (6-pin Female)

2) PS2MOUSE p. 1 9 PS/2 Mouse Connector (6-pin Female)

3) PRINTER p. 20 Parallel (Printer) Port Connector (25-pin Female)

4) COM1 p. 20 Serial Port COM1 (9-pin Female)

5) USB p. 20 Universal Serial BUS Ports 1 & 2 (Two 4-pin Female)

6) FLOPPY p. 2 0 Floppy Drive Connector (34-pin Block)

7) COM2 p. 21 Serial Port COM2 (10-pin Block)

8) FAN p. 21 CPU Cooling Fan Power Lead (3-pin Block)

9) Primary / Second IDE p. 22 Primary / Secondary IDE Connector (40-pin Blocks)

10) IDELED p. 2 2 IDE LED Activity Light

11) TB LED (CON1) p. 23 Turbo LED/Power LED (2-pins)

12) SMI (CON1) p. 23 SMI Switch Lead (2-pins)

13) RESET (CON1) p. 23 Reset Switch Lead (2-pins)

14) KEYLOCK (CON1) p. 23 Keyboard Lock Switch Lead (5-pins)

15) SPEAKER (CON1) p. 23 Speaker Output Connector (4-pins)

16) IR p. 24 Infrared Port Module Connector

17) ATXPWR p. 24 Motherboard Power Connector (12-pin Block)

(Map of Board)

III. INSTALLATION

ASUS P/I-XP55TVP4 User’s Manual 5

III. INSTALLATION

Pin 1

III. INSTALLATION

Installation Steps

Before using your computer, you must complete the following steps:

1. Set Jumpers on the Motherboard

2. Install DRAM 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. 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 loca­tions of jumpers. The jumper settings will be described numerically such as [----],

(Jumpers)

[1-2], [2-3] for no connection, connect pins 1&2, and connect pins 2&3 respec­tively. Pin 1 for our motherboards is always on top
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 compo­nents 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. 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.

Pin 1

or on the left

when

6 ASUS P/I-XP55TVP4 User’s Manual

III. INSTALLATION

Jumper Settings

1. Total Level 2 Cache Size Setting (L2SIZE)

This jumper sets the total amount of L2 cache that is present. If you have both
onboard cache chips (see "Map of Motherboard" for locations) and a Cache
Expansion Slot, then you have 256KB. If you only have onboard cache chips,
then you have 512KB. An "ASUS" or "COAST" cache module can be used to
upgrade the 256KB version to 512KB. If there is no onboard cache, you may
install a cache module of either 256KB or 512KB. IMPORTANT: See page
14 "SRAM Cache" for installation procedures. Regardless of your cache
combination, set the following jumpers according to the total amount of L2
cache that is present onboard and installed as a module.

Cache Size L2SIZE

256KB [2-3] (Default)
512KB [1-2]

Total Level 2 Cache Size

L2SIZE

1
2
3

256KB (Default)

L2SIZE

512KB

1
2
3

(Jumpers)

III. INSTALLATION

ASUS P/I-XP55TVP4 User’s Manual 7

III. INSTALLATION

2. Flash ROM Boot Block Programming (BBLKW)

This sets the operation mode of the boot block area of the Programmable Flash
ROM to allow programming in the Enabled position. This is required only if
prompted by the Flash Memory Writer Utility as shown in BIOS SOFTW ARE.

Programming BBLKW

Disabled/Protect [1-2] (Default)
Enabled [2-3]

III. INSTALLATION

(Jumpers)

BBLKW

123 123

Disabled / Protected
(Default)

Boot Block Programming (Disable / Enable)

BBLKW

Enabled

8 ASUS P/I-XP55TVP4 User’s Manual

III. INSTALLATION

3. Real Time Clock (RTC) RAM / Battery Test Jumper (RTCLR)

The CMOS RAM is powered by the onboard button cell battery. You can test
the battery’s current by removing this jumper and attaching a current meter to
each pin. 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 will be cleared by this action.
You must enter BIOS to “Load Setup Defaults” and re-enter any user infor ­mation after removing and reapplying this jumper.

RTC RAM RTCLR

Operation [short] (Default)
Clear Data [open]

RTCLR

Operation
(Default)

Clear CMOS Data / Battery Test Jumper

RTCLR

Clear CMOS Data /
Battery Test Mode

(Jumpers)

III. INSTALLATION

ASUS P/I-XP55TVP4 User’s Manual 9

III. INSTALLATION

4. CPU External (BUS) Frequency Selection (FS0, FS1, FS2)

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)

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.

III. INSTALLATION

(Jumpers)

BUS Frequency Ratio

BF0
BF1

FS1

FS2

50MHZ

123

1.5 (3/2)

FS0

1
2
3

123

2.0 (2/1)

FS1

FS2

60MHZ

FS0

1
2
3

123

3.0 (3/1)

FS1

FS2

55MHZ

FS0

1
2
3

123

2.5 (5/2)

FS1

FS0

FS2

66.6MHZ

1
2
3

Set the jumpers by the Internal speed of the Intel, AMD, or Cyrix CPU as follows:

(BUS Freq.) (Freq. Ratio)

CPU Model Freq. Ratio BUS Freq. FS2 FS1 FS0 BF0 BF1

Intel Pentium 200MHz 3.0x 66MHz [1-2] [2-3] [2-3] [1-2] [2-3]
Intel Pentium 166MHz 2.5x 66MHz [1-2] [2-3] [2-3] [2-3] [2-3]

Intel Pentium 150MHz 2.5x 60MHz [2-3] [2-3] [1-2] [2-3] [2-3]
Intel Pentium 133MHz 2.0x 66MHz [1-2] [2-3] [2-3] [2-3] [1-2]

Intel Pentium 120MHz 2.0x 60MHz [2-3] [2-3] [1-2] [2-3] [1-2]
Intel Pentium 100MHz 1.5x 66MHz [1-2] [2-3] [2-3] [1-2] [1-2]

Intel Pentium 90MHz 1.5x 60MHz [2-3] [2-3] [1-2] [1-2] [1-2]
Intel Pentium 75MHz 1.5x 50MHz [2-3] [2-3] [2-3] [1-2] [1-2]

AMD PR133 100MHz 1.5x 66MHz [1-2] [2-3] [2-3] [1-2] [1-2]
AMD PR120 90MHz 1.5x 60MHz [2-3] [2-3] [1-2] [1-2] [1-2]
AMD PR100 100MHz 1.5x 66MHz [1-2] [2-3] [2-3] [1-2] [1-2]
AMD P90 90MHz 1.5x 60MHz [2-3] [2-3] [1-2] [1-2] [1-2]
AMD P75 75MHz 1.5x 50MHz [2-3] [2-3] [2-3] [1-2] [1-2]

*Cyrix 166+ 133MHz 2.0x 66MHz [1-2] [2-3] [2-3] [2-3] [1-2]

*NOTE: Only Cyrix Revision 2.7 or later is supported on this motherboard. See next page for revision

identification. Bootup screen will show 6x86-P166+ -S CPU at 133MHz with the Cyrix
166+ installed on this motherboard.

10 ASUS P/I-XP55TVP4 User’s Manual

III. INSTALLATION

Compatible Cyrix CPU Identification

The only Cyrix CPU that is supported on this motherboard is
labeled Cyrix 6x86 P166+ but must be Revision 2.7 and later .
Look on the underside of the CPU for the serial number . The
number should read G8DC6620A or larger.

6. Voltage Regulator Output Selection (VID0 - VID6)

These jumpers set the voltage supplied to the CPU. Determine whether your CPU
has a Single Power Plane or Dual Power Planes and then the voltage that it uses.
Current Intel CPU's marked "Pentium" has only a single power plane and uses the
standard 3.38 volts (STD) or 3.5 volts (VRE). Currently Intel’ s new Pentium P55C
MMX 200MHz is supported at 2.8Volts.

Intel P54C Pentium
(75-200MHz)

Intel P55C Pentium
MMX (200MHz)

AMD-K5
(PR75-133MHz)

--- --- P55C --- STD VRE

2.5V 2.7V 2.8V 2.9V 3.4V 3.5V
VID0 [1-2] [1-2] [2-3] [1-2] [2-3] [1-2]
VID1 [2-3] [1-2] [2-3] [2-3] [1-2] [1-2]
VID2 [1-2] [1-2] [2-3] [2-3] [2-3] [2-3]

123

VID0
VID1
VID2

2.5V
123

VID0
VID1
VID2

2.9V

CPU Voltage ID

123

2.7V
123

3.4V-STD

Cyrix 6x86 166+
Rev2.7 (133MHz)

123

2.8V-P55C
123

3.5V-VRE

(System Memory)

III. INSTALLATION

ASUS P/I-XP55TVP4 User’s Manual 11

2. System Memory

This motherboard supports four 72-pin SIMMs of 4MB, 8MB, 16MB, or 32MB to
form a memory size between 8MB to 128MB. SIMMs can be either 60ns or 70ns
Extended Data Output (EDO) or Asymmetric/Symmetric Fast Page Mode (FPM)
modules.

.

Install memory in any or all of the banks in any combination as follows:

Bank SIMM Memory Module Total Memory
Bank 0 4MB, 8MB, 16MB, 32MB x2
SIMM Slots 1&2 72-pin FPM or EDO SIMM

Bank 1 4MB, 8MB, 16MB, 32MB x2

III. INSTALLATION

(SIMM Memory)

SIMM Slots 3&4 72-pin FPM or EDO SIMM

III. INSTALLATION

Total System Memory (128MB Max) =

IMPORTANT: Memory setup is required in BIOS Chipset Setup "Auto Con­figuration."

IMPORTANT: Each bank must have the same size memory installed in pairs.
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 cause unreliable operation.

12 ASUS P/I-XP55TVP4 User’s Manual

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 sockets which requires the
"Notched End" of the SIMM memory modules.

1234

72 Pin SIMM Sockets

Bank 0 Bank 1

Notched End

2. Press the memory module firmly into place starting from a 45 degree angle
making sure that all the contacts are aligned with the sockets.

3. W ith your finger tips, rock the memory module into a vertical position so that it
clicks into place.

72 Pin DRAM in SIMM Socket

Metal Clip

Plastic Safety Tab (This Side Only)

4. The plastic guides should go through the two "Mounting Holes" on the sides and
the "Metal Clips" should snap on the other side.

Mounting Hole

(SIMM Memory)

III. INSTALLATION

5. To release the memory module, squeeze both "Metal Clips" outwards and rock
the module out of the "Metal Clips".

ASUS P/I-XP55TVP4 User’s Manual 13

Static RAM (SRAM) for Level 2 (External) Cache

The motherboard you purchase may have either 0KB, 256KB, or 512KB onboard.
If you have both onboard cache chips (see "Map of Motherboard" for locations) and
a Cache Expansion Slot, then you have 256KB. If you only have onboard cache
chips, then you have 512KB. An "ASUS" or "COAST" cache module can be used
to upgrade the 256KB version to 512KB. If there is no onboard cache, you may
install a cache module of either 256KB or 512KB.

IMPORTANT: You must set "Total Level 2 Cache Size Setting" jumper when
changes are made to your cache size.

III. INSTALLATION

(Level 2 Cache)

III. INSTALLATION

42 Pins38 Pins

Pipelined Burst Cache Module

Level 2 Cache Expansion Slot

Insert the module as shown. Because the number of pins are different on either side
of the break, the module will only fit in the orientation as shown.

Compatible Cache Modules for this Motherboard

SIMM Cache Module 256KB Onboard 0KB Onboard

ASUS CM1 Rev 1.0 ---- ---­ASUS CM1 Rev 1.3 ---- ---­ASUS CM4 Rev 1.5 ---- ---­ASUS CM1 Rev 1.6 Yes ---­ASUS CM1 Rev 3.0* Yes Yes
COAST 1.1 ---- ---­COAST 1.2 ---- ---­COAST 1.3 ---- ---­COAST 2.0 Yes Yes
COAST 2.1 Yes Yes
COAST 3.0 Yes Yes
COAST 3.1 Yes Yes

*NOTE: ASUS CMI Rev 3.0 has two TAG SRAM's to comply with COAST 3.0
specifications. This extra T AG SRAM will not conflict with the onboard T AG SRAM.

14 ASUS P/I-XP55TVP4 User’s Manual