ASUS P55TVP4 User Manual

R P/I-P55TVP4

Pentium Motherboard

USER’S MANUAL

Motherboard Model Information

This motherboard has various models besides the full-featured model described in this manual. You have the option of purchasing models with or without the DIMM sockets, MediaBus extension, or the L2 cache expansion slot. Ignore the features that are not relevant to your model. You have the option of choosing 256KB or 512KB L2 cache onboard. To determine your L2 cache size, look on the box Model: or press Pause when the BIOS diagnostic displays the information chart on your system. The third line on the top right of the chart will show one of the following:

Cache Memory : 256K

Cache Memory : 512K

To upgrade to 512KB cache, the 256K model requires a 256KB cache module to be inserted into the optional L2 cache expansion slot. See your retailer about any features that you may need before purchasing.

USER'S NOTICE

No part of this manual, including the products and software described in it, may be reproduced, transmitted, transcribed, stored in a retrieval system, or translated into any language in any form or by any means, except documentation kept by the purchaser for backup purposes, without the express written permission of ASUSTeK COMPUTER INC. (“ASUS”).

ASUS PROVIDES THIS MANUAL “AS IS” WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OR CONDITIONS OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL ASUS, ITS DIRECTORS, OFFICERS, EMPLOYEES OR AGENTS BE LIABLE FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES (INCLUDING DAMAGES FOR LOSS OF PROFITS, LOSS OF BUSINESS, LOSS OF USE OR DATA, INTERRUPTION OF BUSINESS AND THE LIKE), EVEN IF ASUS 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.

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

•IBM and OS/2 are registered trademarks of International Business Machines.

•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 and Acrobat are registered trademarks of Adobe Systems Incorporated.

The product name and revision number are both printed on the product itself. Manual revisions are released for each product design represented by the digit before and after the period of the manual revision number. Manual updates are represented by the third digit in the manual revision number.

For previous or updated manuals, BIOS, drivers, or product release information, contact ASUS at http://www.asus.com.tw or through any of the means indicated on the following page.

SPECIFICATIONS AND INFORMATION CONTAINED IN THIS MANUAL ARE FURNISHED FOR INFORMATIONAL USE ONLY, AND ARE SUBJECT TO CHANGE AT ANY TIME WITHOUT NOTICE, AND SHOULD NOT BE CONSTRUED AS A COMMITMENT BY ASUS. ASUS ASSUMES NO RESPONSIBILITY OR LIABILITY FOR ANY ERRORS OR INACCURACIES THAT MAYAPPEAR IN THIS MANUAL, INCLUDING THE PRODUCTS AND SOFTWARE DESCRIBED IN IT.

Copyright © 1997 ASUSTeK COMPUTER INC. All Rights Reserved.

Product Name:	ASUS P/I-P55TVP4
Manual Revision:	2.33
Release Date:	November 1997

2	ASUS P/I-P55TVP4 User’s Manual

ASUS CONTACT INFORMATION

ASUSTeK COMPUTER INC.

Marketing Info

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

Technical Support

Fax: [phone]

BBS: [phone]

Email: [e-mail]

WWW: 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: [phone]

Email: [e-mail]

WWW:www.asus.com

ASUS COMPUTER GmbH

Marketing Info

Address:	Harkort Str. 25, 40880 Ratingen, BRD, Germany
Telephone:	49-2102-445011
Fax:	49-2102-442066
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 P/I-P55TVP4 User’s Manual

3

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 P/I-P55TVP4 Motherboard ..........................	9
III. INSTALLATION ........................................................................	10
ASUS P/I-P55TVP4 Motherboard Layout ....................................	10
Installation Steps ............................................................................	12
1. Jumpers ......................................................................................	12
Jumper Settings ..................................................................	13
Compatible Cyrix CPU Identification ................................	15
2. System Memory (DRAM/SDRAM & SRAM) ........................	17
DRAM Memory Installation Procedures: ..........................	18
SDRAM Memory Installation Procedures: ........................	19
Static RAM (SRAM) for Level 2 (External) Cache .................	20
Compatible Cache Modules for this Motherboard .............	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 ..................................................................	25
Power Connection Procedures .................................................	31
IV. BIOS SOFTWARE .....................................................................	32
Support Software ...........................................................................	32
Flash Memory Writer Utility .........................................................	32
Main Menu .........................................................................	32
Advanced Features Menu ...................................................	33
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

4	ASUS P/I-P55TVP4 User’s Manual

CONTENTS
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
VI. ASUS PCI SCSI Cards ..............................................................	59
Symbios SCSI BIOS and Drivers ..................................................	59
ASUS PCI-SC200 & PCI-SC860 SCSI Cards ..............................	59
Setting Up the ASUS PCI-SC200 & PCI-SC860 .....................	60
Setting the INT Assignment for the ASUS PCI-SC200 ...........	60
Terminator Requirements for SCSI Devices ............................	60
Terminator Settings for the ASUS PCI-SC860 ........................	61
Terminator Settings for the ASUS PCI-SC200 ........................	61
SCSI ID Numbers for SCSI Devices .......................................	62
SCSI ID Priority .......................................................................	62

ASUS P/I-P55TVP4 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:

•Reorient or relocate the receiving antenna.

•Increase the separation between the equipment and receiver.

•Connect the equipment to an outlet on a circuit different from that to which the receiver is connected.

•Consult the dealer or an experienced radio/TV technician for help.

WARNING! The use of shielded cables for connection of the monitor to the graphics card is required to assure compliance with FCC regulations. Changes or modifications to this unit not expressly approved by the party responsible for compliance could void the user's authority to operate this equipment.

Canadian Department of Communications Statement

This digital apparatus does not exceed the Class B limits for radio noise emissions from digital apparatus set out in the Radio Interference Regulations of the Canadian Department of Communications.

6	ASUS P/I-P55TVP4 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 concerning this product. III. Installation: Instructions on setting up the motherboard.

IV. BIOS Setup: Information on setting up the BIOS software. V. Support Software: Information on the included support software. VI. ASUS SCSI Cards: Installation of optional ASUS SCSI cards.

Item Checklist

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

(1) ASUS motherboard

(1) 9pin male serial + 25pin male serial external connector set

(1) 25pin female parallel + 6pin female PS/2 mouse external connector set

(1) IDE ribbon cable for master and slave drives

(1) floppy ribbon cable for (1) 5.25inch floppy and (2) 3.5inch floppies

(1) bag of spare jumpers

(1) disk or CD disc with support drivers and utilities:

•Flash Memory Writer utility to update the onboard programmable 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

(1) User’s manual

ASUS PCI-SC200 Fast-SCSI or PCI-SC860 Ultra-Fast SCSI card

PS/2 mouse, Infrared, USB1, and USB2 external connector module (optional) ASUS pipelined burst cache module (optional)

I. INTRODUCTION	(Manual / Checklist)

ASUS P/I-P55TVP4 User’s Manual

7

FEATURES .II (Features)

II. FEATURES

Features of the ASUS Motherboard

The ASUS P/I-P55TVP4 is carefully designed for the demanding PC user who wants a great many features in a small package. This motherboard:

•Easy Installation: Equipped with BIOS that supports autodetection of hard drives, PS/2 mouse, and Plug and Play devices to make set up of hard drives, expansion cards, and other devices virtually automatic.

•Versatile Processor Support: Intel Pentium® 75-233MHz (P55C-MMX™ , P54C/ P54CS), IBM® /Cyrix® 6x86-PR166+ (Rev 2.7 or later), IBM® /Cyrix® 6x86MX™

(PR166 & faster), AMD-K5™ (PR75-PR133), AMD-K6™ (PR166 & faster).

•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: Comes in 0KB, 256KB, or 512KB Pipelined Burst SRAM version, each version is upgradeable to 256KB or 512KB. Upgrades are made through a

Synchronous SRAM cache module. (See page 14 for compatible 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. Has two 168-pin DIMMs to support (8, 16, 32MB) SDRAM modules.

•ISA and PCI Expansion Slots: Provides three 16-bit ISA slots, three 32-bit PCI slots, and one PCI/MediaBus, which allows the use of either a standard PCI card or the ASUS MediaBus Card.

•ASUS MediaBus: Features an expansion slot extension shared with PCI Slot 4 for an optional high-performance expansion card, which includes two functions in one easy-to-install card.

•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.

•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 Tape Backup and CD-ROM drives. Supports two drives of either 5.25inch (360KB or 1.2MB) or 3.5-inch (720KB, 1.44MB or 2.88MB) disk drives. Supports Japanese “Floppy 3 mode” (3.5-inch disk drive: 1.2MB) and LS-120 floppy disk drives (3.5-inch disk drive: 120MB, 1.44MB, 720KB). BIOS supports IDE CD-ROM or SCSI device bootup.

8	ASUS P/I-P55TVP4 User’s Manual

II.FEATURES

•Optional PS/2 Mouse, USB, IrDA Connector: Supports an optional cable and bracket set to mount the connectors to an unused expansion slot. A second IrDA connector is available for a standard individual infrared cable set.

•Symbios SCSI BIOS: Supports the optional ASUS SCSI controller cards through onboard firmware.

Parts of the ASUS P/I-P55TVP4 Motherboard

Programmable
Flash ROM	Super Multi-I/O	Serial/Parallel Ports

3 ISA Slots

3 PCI Slots

IDE/Floppy

2 DIMM Sockets

PCI 4 or ASUS

MediaBus Slot

Intel’s 430VX

PCIset

(4) 72-pin SIMM

Sockets

CPU ZIF

Socket 7

L2 Upgrade

Cache

Expansion Slot

Onboard 256KB/

512KB Pipelined

Burst L2 Cache

II. FEATURES (Motherboard Parts)

ASUS P/I-P55TVP4 User’s Manual

9

INSTALLATION .III ) Layout (Motherboard

III. INSTALLATION

ASUS P/I-P55TVP4 Motherboard Layout

PS/2 Mouse Key-

board

					Block			Universal Serial Bus
								(Reserved for future use)
3 Slot ISA	2 Slot ISA	1 Slot ISA			JP10 (Dis/En) Program	JP9 (En/Dis) I/O Multi			Super
									Multi I/O
			MediaBus / 4 Slot PCI	3 Slot PCI			2 Slot PCI	1 Slot PCI	IDE Primary	IDE Secondary
			0.2

BUS FREQ

JP3

JP2

JP1

Serial Ports

COM 1 COM 2

Parallel Port (Printer)

Floppy Drives

Board Power Input

P8 P9

3) (Bank 2 Socket DIMM

0) (Bank 1 Socket SIMM

0) (Bank 2 Socket SIMM

1) (Bank 3 Socket SIMM

1) (Bank 4 Socket SIMM

2) (Bank 1 Socket DIMM

Pipelined

L2 CACHE

Burst

Level

CPU ZIF Socket 7

JP4

Vio/Vcore

2

RTC

JP22

Cache

JP16

JP21

JP20 BUS Ratio

JP19

JP18

LEDIDE

JP17

SlotExpansion

1)(CONConnCase

.ConInfrared

JP6

JP5

Clear

JP7

256/512KB OnBoard L2 Cache

10	ASUS P/I-P55TVP4 User’s Manual

III. INSTALLATION

Jumpers

1)	JP9	p. 7	Multi-I/O Selection (Enable/Disable)
2)	JP10	p. 7	Flash ROM Boot Block Program (Disable/Enable)
3)	JP4	p. 8	Total Level 2 Cache Size Setting
4)	JP7	p. 8	Real Time Clock RAM (Operation/Clear Data)
5)	JP16-22	p. 9	CPU Voltage Selection
6)	JP1, 2, 3	p. 10	CPU External Clock (BUS) Frequency Selection
7)	JP5, JP6	p. 10	CPU:BUS Frequency Ratio

Expansion Slots

1)	SIMM Sockets	p. 11	72-Pin DRAM Memory Expansion Sockets
2)	DIMM Sockets	p. 13	168-Pin SDRAM Memory Expansion Sockets
3)	Cache Expansion	p. 14 Pipelined Burst SRAM Cache Module Socket
4)	ZIF Socket 7	p. 15 Central Processing Unit (CPU) Socket
5)	ISA Slots 1,2,3	p. 16	16-bit ISA Bus Expansion Slots
6)	PCI Slots 1,2,3	p. 16	32-bit PCI Bus Expansion Slots

Connectors

1)	KBCON	p. 19	Keyboard Connector (5-pin female)
2)	PS2MOUSE	p. 19	PS/2 Mouse Connector (6-pin block)
3)	PRINTER	p. 20	Parallel (Printer) Port Connector (26-1 pin block)
4)	COM1, COM2	p. 20	Serial Port COM1 & COM2 (10-1 pin blocks)
5)	FLOPPY	p. 21	Floppy Disk Drive Connector (34-pin block)
6)	POWER	p. 21	Motherboard Power Connector (12-pin block)
7)	Primary / Second IDE	p. 22	Primary / Secondary IDE Connector (40-1 pin blocks)
8)	IDELED	p. 22	IDE LED Activity Light (2 pins)
9)	TB LED (CON1)	p. 23	Turbo LED/Power LED (2 pins)
10)	SMI (CON1)	p. 23	SMI Switch Lead (2 pins)
11)	RESET (CON1)	p. 23	Reset Switch Lead (2 pins)
12)	KEYLOCK (CON1)	p. 23	Keyboard Lock Switch Lead (5 pins)
13)	SPEAKER (CON1)	p. 23	Speaker Output Connector (4-pins)
14)	IR	p. 24	Infrared Port Module Connector
15)	USB	p. 24	Universal Serial Bus Connector (10-pin block) (Reserved)

Motherboard Layout

III. INSTALLATION

ASUS P/I-P55TVP4 User’s Manual

11

INSTALLATION .III (Jumpers)

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 motherboard layout locations 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 respectively. Pin 1 for our motherboards is

Pin 1	Pin 1

always on top	or on the left		when holding the motherboard with the key-

board 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 motherboards and expansion cards contain very delicate Integrated Circuit (IC) chips. To protect them against damage from static electricity, you should follow some precautions whenever you work on your computer.

1.Unplug your computer when working on the inside.

2.Use a grounded wrist strap before handling computer components. If you do not have one, touch both of your hands to a safely grounded object or to a metal object, such as the power supply case.

3.Hold components by the edges and try not to touch the IC chips, leads or connectors, or other components.

4.Place components on a grounded antistatic pad or on the bag that came with the component whenever the components are separated from the system.

12	ASUS P/I-P55TVP4 User’s Manual

III. INSTALLATION

Jumper Settings

1.Onboard Multi-I/O Selection (JP9)

You can selectively disable each onboard Multi-I/O item (floppy, serial, parallel, and IrDA) through Chipset Features Setup of BIOS SOFTWARE or disable all Multi-I/O items at once with the following jumper to use your own Multi-I/O card.

Multi-I/O	JP9
Enable	[1-2] (Default)
Disable	[2-3]

JP9	JP9
1	1
2	2
3	3
Enable (Default)	Disabled

Multi I/O Setting (Enable/Disable)

2.Flash ROM Boot Block Programming (JP10)

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 SOFTWARE.

Programming JP10

Disabled	[1-2] (Default)
Enabled	[2-3]
	JP10	JP10
	1	1
	2	2
	3	3
	Disabled / Protected	Enabled
	(Default)

Boot Block Programming (Disable/Enable)

INSTALLATION	(Jumpers)
III.

ASUS P/I-P55TVP4 User’s Manual

13

INSTALLATION .III (Jumpers)

III.INSTALLATION

3.Total Level 2 Cache Size Setting (JP4)

This jumper sets the total amount of L2 cache that is present. If you have two cache chips onboard (see motherboard layout for locations), then you have 256KB. A 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 External 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.

L2 Cache Size	JP4
256KB	[2-3] (default)
512KB	[1-2]

			JP4			JP4
1							1
				2			2
				3			3
		256KB			512KB

Total L2 Cache Size Setting (256KB/512KB)

4.Real Time Clock (RTC) RAM (JP7)

This clears the user-entered information stored in the CMOS RAM of the Real Time Clock such as hard disk information and passwords. To clear the RTC data: (1) Turn off the PC, (2) Short this jumper, (3) Power on the PC, (4) Turn off the PC, (5) Remove this jumper, (6) Power on the PC, (7) Hold down <Delete> during bootup and enter BIOS setup to re-enter user preferences.

RTC RAM	JP7
Operation	[open]	(Default)
Clear Data	[short]	(momentarily)

JP7	JP7
Operation (Default)	Clear Data

RTC RAM (Operation/Clear Data)

14	ASUS P/I-P55TVP4 User’s Manual

III.INSTALLATION

5.Voltage Regulator Output Selection (JP16-JP22)

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. When a single power plane CPU is installed, the dual power plane selections will be automatically disabled. When a dual power plane CPU is installed, the single power plane selections will be automatically disabled. You may have one jumper on the Single Power Plane and another on the Dual Power Planes at the same time.

Pentium MMX (P55C) Intel Pentium (P54C)	AMD-K6	AMD-K5	IBM/Cyrix 6x86(MX)	IBM/Cyrix 6x86(M1)
(150MHz-233MHz) (75MHz-200MHz)	(PR166 and faster)	(PR75-PR133)	(PR166 and faster)	(PR166 and faster)

Single Power Plane	Type	Voltage	Dual Power Planes	Voltage
JP17 [short]	VRE	3.5V	JP22 [short]	3.2V
JP16 [short] (Default)	STD	3.4V	JP21 [short]	2.5V
			JP20 [short]	2.9V
			JP19 [short]	2.7V
			JP18 [short] (Default) 2.8V

JP22 Reserved JP21 2.5V JP20 2.88V JP19 2.7V JP18 2.8V

JP17 3.5V (VRE) JP16 3.38V (STD)

(Default)

Voltage Regulator Output Selection

Compatible Cyrix CPU Identification

The only Cyrix CPU that is supported on this motherboard is labeled Cyrix 6x86 PR166+ but 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.

INSTALLATION	(Jumpers)
III.

ASUS P/I-P55TVP4 User’s Manual

15

INSTALLATION .III (Jumpers)

III.INSTALLATION

6.CPU External (BUS) Frequency Selection (JP1, JP2, JP3)

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).

7.CPU to BUS Frequency Ratio (JP5, JP6)

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.

JP3 JP2 JP1	JP3 JP2 JP1	JP3 JP2 JP1	JP3 JP2 JP1
1	1	1	1
2	2	2	2
3	3	3	3

50MHz	55MHz	60MHz	66MHz
CPU External Clock (BUS) Frequency Selection
JP5 JP6	JP5 JP6	JP5 JP6	JP5 JP6
1.5 x	2.0 x	2.5 x	3.0 x

CPU : BUS Frequency Ratio (1.5x, 2.0x, 2.5x, 3.0x)

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

CPU Model	Freq.						(BUS Freq.)			(Freq. Ratio)
		Ratio		BUS	Freq.	JP3		JP2	JP1	JP6	JP5
Intel Pentium	233MHz	3.5x		66MHz		[2-3]		[1-2]	[2-3]	[1-2] [1-2]
Intel Pentium	200MHz	3.0x		66MHz		[2-3]		[1-2]	[2-3]	[1-2] [2-3]
Intel Pentium	166MHz	2.5x		66MHz		[2-3]		[1-2]	[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		[2-3]		[1-2]	[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		[2-3]		[1-2]	[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-K6-PR233	233MHz	3.5x		66MHz		[2-3]		[1-2]	[2-3]	[1-2] [1-2]
AMD-K6-PR200	200MHz	3.0x		66MHz		[2-3]		[1-2]	[2-3]	[1-2] [2-3]
AMD-K6-PR166	166MHz	2.5x		66MHz		[2-3]		[1-2]	[2-3]	[2-3] [2-3]
AMD-K5-PR133/100	100MHz	1.5x		66MHz		[2-3]		[1-2]	[2-3]	[1-2] [1-2]
AMD-K5-PR120/90	90MHz	1.5x		60MHz		[2-3]		[2-3]	[1-2]	[1-2] [1-2]
AMD-K5-PR75	75MHz	1.5x		50MHz		[2-3]		[2-3]	[2-3]	[1-2] [1-2]
IBM/Cyrix6x86MX-PR233	200MHz	3.0x		66MHz		[2-3]		[1-2]	[2-3]	[1-2] [2-3]
IBM/Cyrix6x86MX-PR200	166MHz	2.5x		66MHz		[2-3]		[1-2]	[2-3]	[2-3] [2-3]
IBM/Cyrix6x86MX-PR166	150MHz	2.5x		60MHz		[2-3]		[2-3]	[1-2]	[2-3] [2-3]
*IBM/Cyrix -PR166+	133MHz	2.0x		66MHz		[2-3]		[1-2]	[2-3]	[2-3]	[1-2]

*NOTE: The only IBM/Cyrix 6x86(L) (or M1) that is supported on this motherboard is rev 2.7 or later.

16	ASUS P/I-P55TVP4 User’s Manual

III.INSTALLATION

2.System Memory (DRAM/SDRAM & SRAM)

This motherboard supports four 72-pin SIMMs (Single Inline Memory Modules) of 4MB, 8MB, 16MB, or 32MB to form a memory size between 8MB to 128MB. The DRAM can be either 60ns or 70ns Fast Page Mode (FPM) (Asymmetric or Symmetric) or Enhanced Data Output (EDO). SIMMs must be installed in pairs so that each bank contains two of the same size memory modules. A new feature is the support of Dual Inline Memory Modules (DIMM’s) when the SIMM sockets are not used. Two slots are available for 3.3Volt (power level) Unbuffered Synchronous DRAMs (SDRAM) of either 8, 16, or 32MB. Maximum memory of SIMMs or DIMMs must be 128MB or less.

IMPORTANT: Memory speed setup is required through "Auto Configuration" in BIOS Chipset Setup of the BIOS SOFTWARE.

Install memory in Banks 0&1 or Banks 2&3 in combinations as follows:

Bank	Memory Module		Total Memory
Bank 0	4MB, 8MB, 16MB, 32MB	x2
SIMM Slots 1&2	72-pin FPM or EDO SIMM
	(Bank 2 & 3 must be empty)
Bank 1	4MB, 8MB, 16MB, 32MB	x2
SIMM Slots 3&4	72-pin FPM or EDO SIMM
	(Bank 2 & 3 must be empty)
Bank 2	8MB, 16MB, 32MB, 64MB	x1
DIMM Slot 1	168-pin EDO or SDRAM DIMM
	(Bank 0 & 1 must be empty)
Bank 3	8MB, 16MB, 32MB, 64MB	x1
DIMM Slot 2	168-pin EDO or SDRAM DIMM
	(Bank 0 & 1 must be empty)
	Total System Memory (Max 128MB)	=

WARNING: Do not install both SIMMs and DIMMs at the same time or else you will burn your memory. Previous motherboards supported both SIMMs and DIMMs to be used together because there were 5 volt signal tolerant DIMMs, but these memory modules are no longer produced.

IMPORTANT: Banks 0 & 1 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 be unstable.

III. INSTALLATION (System Memory)

ASUS P/I-P55TVP4 User’s Manual

17

INSTALLATION .III Memory) (DRAM

III. INSTALLATION

DRAM 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.

1 2 3 4

DRAM Memory

Module Example

Notched End

Bank 0 Bank 1

72 Pin SIMM DRAM Sockets

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.

Clip	72 Pin DRAM in SIMM Socket

Plastic Safety Tab (This Side Only)

Mounting Hole

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".

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III. INSTALLATION

SDRAM Memory Installation Procedures:

Insert the module 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 contact on both sides. SDRAM DIMM modules have different pint contact on each side and therefore have a higher pin density.

88 Pins

		Installed SDRAM
		Memory Module
60 Pins		Example
20 Pins
Lock

168 Pin DIMM SDRAM Sockets

The Dual Inline Memory Module (DIMM) memory module must be 3.3Volt Unbuffered Synchronous DRAM (SDRAM) of either 8, 16, or 32. You can identify the type of DIMM module by the illustration below:

III. INSTALLATION (SDRAM Memory)

SDRAM Key Position		Voltage Key Position

RFU	Unbuffered
Buffered

5.0V	Reserved
	3.3V

168-PIN SDRAM DIMM Notch Key Definitions

The notch on the DIMM module will shift between left, center, or right to identify the type and also to prevent the wrong type to be inserted into the DIMM slot on the motherboard. You must ask your retailer for the specifications before purchasing. 4 clock signals are supported on this motherboard.

ASUS P/I-P55TVP4 User’s Manual

19

INSTALLATION .III Cache) (External

III. INSTALLATION

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 on when changes are made to your cache size.

42 Pins

Pipelined Burst

Cache Module

Example

38 Pins

L2 Cache Expansion Socket

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 to 512KB	0KB to 256/512KB
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 CM1 Rev 3.0 has two TAG SRAM's to comply with COAST 3.0 specifications. This extra TAG SRAM will not conflict with the onboard TAG SRAM.

20	ASUS P/I-P55TVP4 User’s Manual