JETWAY V333U User Manual

V333U

USER'S MANUAL

M/B For Socket-A Athlon/Duron Processor

NO. G03-V333UR1A

Release date: July 2002

Trademark:

* Specifications and Information contained in this documentation are furnished for information use only, and are

subject to change at any time without notice, and should not be construed as a commitment by manufacturer.

i

USER’S NOTICE................................................................................ ii

MANUAL REVISION INFORMATION.............................................. 1

COOLING SOLUTIONS ................................................................... 1

CHAPTER 1 INTRODUCTION OF V333U MOTHERBOARD

1-1 FEATURE OF MOTHERBOARD ............................................... 2

1-2 SPECIFICATION .................................................................... 3

1-3 PERFORMANCE LIST.............................................................4

1-4 LAYOUT DIAGRAM & JUMPER SETTING ................................ 5

CHAPTER 2 HARDWARE INSTALLATION

2-1 HARDWARE INSTALLATION STEPS ........................................ 7

2-2 CHECKING MOTHERBOARD'S JUMPER SETTING.................... 7

2-3 INSTALL CPU ........................................................................ 9

2-3-1 GLOSSARY...........................................................................9

2-3-2 ABOUT AMD ATHLON & DURON 462-PIN CPU .........................

10

2-4 INSTALL MEMORY................................................................ 11

2-5 EXPANSION CARD ................................................................. 12

2-5-1 PROCEDURE FOR EXPANSION CARD INSTALLATION .............12

2-5-2 ASSIGNING IRQ FOR EXPANSION CARD.................................

12

2-5-3 INTERRUPT REQUEST TABLE FOR THIS MOTHERBOARD.......

13

2-5-4 AGP SLOT ............................................................................

13

2-6 CONNECTORS, HEADERS....................................................... 13

2-6-1 CONNECTORS ......................................................................

13

2-6-2 HEADERS.............................................................................16

2-7 STARTING UP YOUR COMPUTER ........................................... 19

CHAPTER 3 INTRODUCING BIOS

3-1 ENTERING SETUP.................................................................. 20

3-2 GETTING HELP ..................................................................... 20

3-3 THE MAIN MENU................................................................... 21

3-4 STANDARD CMOS FEATURES................................................. 22

3-5 ADVANCED BIOS FEATURES .................................................. 23

3-6 ADVANCED CHIPSET FEATURES ............................................ 25

3-6-1 DRAM TIMING SETTINGS............................................. 26

3-6-2 AGP TIMING SETTINGS................................................ 27

3-6-3 PCI TIMING SETTINGS ................................................. 27

3-7 INTEGRATED PERIPHERALS.................................................. 28

3-7-1 ONCHIP IDE FUNCTION ............................................... 28

3-7-2 ONCHIP DEVICE FUNCTION ......................................... 29

3-7-3 ONCHIP SUPER IO FUNCTION ...................................... 30

TABLE OF CONTENT

ii

3-8 POWER MANAGEMENT SETUP............................................... 31

3-8-1 WAKE UP EVENTS....................................................... 32

3-8-1.1 IRQS ACTIVITIES...................................................33

3-9 PNP/PCI CONFIGURATION SETUP .......................................... 33

3-9-1 IRQ RESOURCES ......................................................... 34

3-10 PC HEALTH STATUS ............................................................. 34

3-11 MISCELLANEOUS CONTROL................................................. 35

3-12 LOAD STANDARD/OPTIMIZED DEFAULTS ............................. 36

3-13 SET SUPERVISOR/USER PASSWORD ...................................... 36

CHAPTER 4 DRIVER & FREE PROGRAM INSTALLATION

MAGIC INSTALL SUPPORTS WINDOWS 95/98/98SE/NT4.0/2000......... 37

4-1 VIA 4 IN 1

INSTALL VIA SERVICE PACK 4 IN 1 DRIVER

................ 38

4-2 SOUND

INSTALL CMI AUDIO CODEC DRIVER

........................ 39

4-3 PC-HEALTH

WINBOND HARDWARE DOCTOR MONITORING SOFTWARE

........................................................................ 41

4-3-1

HOW TO UTILIZE PC-HEALTH

....................................... 41

4-4 MAGIC BIOS

INSTALL BIOS LIVE UPDATE UTILITY

........................ 42

4-5 PC-CILLIN

INSTALL PC-CILLIN2002 ANTI-VIRUS PROGRAM

.......... 43

4-6 USB 2.0

INSTALL VIA USB 2.0 DEVICE DRIVER ...............................

44

4-7 HOW TO DISABLE ON-BOARD SOUND .................................... 45

4-8 HOW TO UPDATE BIOS .......................................................... 45

USER’S NOTICE

COPYRIGHT OF THIS MANUAL BELONGS TO THE MANUFACTURER. NO PART OF

THIS MANUAL, INCLUDING THE PRODUCTS AND SOFTWARE DESCRIBED IN IT

MAY BE REPRODUCED, TRANSMITTED OR TRANSLATED INTO ANY LANGUAGE IN

ANY FORM OR BY ANY MEANS WITHOUT WRITTEN PERMISSION OF THE

MANUFACTURER.

THIS MANUAL CONTAINS ALL INFORMATION REQUIRED TO USE V333U MOTHER-

BOARD AND WE DO ASSURE THIS MANUAL MEETS USER’S REQUIREMENT BUT WILL

CHANGE, CORRECT ANY TIME WITHOUT NOTICE. MANUFACTURER PROVIDES THIS

MANUAL “AS IS” WITHOUT WARRANTY OF ANY KIND, AND WILL NOT BE LIABLE

FOR ANY INDIRECT, SPECIAL, INCIDENTIAL OR CONSEQUENTIAL DAMAGES (INCL UDING

DAMANGES FOR LOSS OF PROFIT, LOSS OF BUSINESS, LOSS OF USE OF DATA,

INTERRUPTION OF BUSINESS AND THE LIKE).

PRODUCTS AND CORPORATE NAMES APPEARING IN THIS MANUAL MAY OR MAY

NOT BE REGISTERED TRADEMARKS OR COPYRIGHTS OF THEIR RESPECTIVE

COMPANIES, AND THEY ARE USED ONLY FOR IDENTIFICATION OR EXPLANATION

AND TO THE OWNER’S BENEFIT, WITHOUT INTENT TO INFRINGE.

1

Manual Revision Information

Reversion Revision History Date

1.0 First Release July 2002

Item Checklist



V333U



Cable for IDE/Floppy



CD for motherboard utilities

□

Cable for USB Port 3/4 (Option)



V333U User’s Manual

AMD Athlon™ / Duron™ Processor Family

Cooling Solutions

As processor technology pushes to faster speeds and higher performance, thermal
management becomes increasingly crucial when building computer systems.
Maintaining the proper thermal environment is key to reliable, long-term system
operation. The overall goal in providing the proper thermal environment is keeping
the processor below its specified maximum case temperature. Heatsinks induce
improved processor heat dissipation through increased surface area and concentrated
airflow from attached fans. In addition, interface materials allow effective transfers
of heat from the processor to the heatsink. For optimum heat transfer, AMD
recommends the use of thermal grease and mounting clips to attach the heatsink to
the processor.
When selecting a thermal solution for your system, please refer to the website below
for collection of heatsinks evaluated and recommended by AMD for use with AMD
processors. Note, those heatsinks are recommended for maintaining the specified
Maximum T case requirement. In addition, this collection is not intended to be a
comprehensive listing of all heatsinks that support AMD processors.

For vendor list of heatsink and fan, please visit

：

http://www1.amd.com/products/duron/thermals
http://www1.amd.com/products/athlon/thermals

2

Chapter 1

Introduction of V333U Motherboard

1-1 Feature of motherboard

The V333U motherboard is design for use AMD Athlon/Duron/Athlon XP 200MHz
/266MHz (Double Data Rate) Front Side Bus Frequency CPU, which utilize the
Socket-A design and the memory size expandable to 3.0GB.

This motherboard use the newest VIA KT333 chipset, whose 133MHz/266MHz
(Double Data Rate) Front Side Bus frequency and 333MHz memory interface
delivers a clear upgrade path to the future generation of 266MHz processors and
DDR200/DDR266/DDR333 DDR SDRAM. The V333U motherboard offers ULTRA
ATA 133 to provide speedier HDD throughout that boosts overall system
performance.

These motherboards also has an integrated AC’97 2.1 CODEC on board which is
fully compatible with Sound Blaster Pro



that gives you the best sound quality and

compatibility. It Supports 4 channel Speaker for 3D Surround Effect.

For those wanting even greater graphic performance, an AGP 4X slot is included on
the board.

With USB control as well as capability of expanding to 6 USB function ports support
USB2.0/USB1.1 Devices, the V333U meet future USB demand also this motherboard
has built-in hardware monitor function. This will monitor and protect your
computer.

A special design in hardware for protecting Athlon XP CPU from burned, the
system will auto shutdown power supply when CPU is overheat or the CPU FAN is
stop.

In V333U we design in CPU Vcore Voltage, DDR memory 2.5V Voltage, AGP

1.5V Voltage those can minor adjustable in BIOS setup. This design can let users
approach over clock demand and also can make system more stable. The V333U

motherboard provides special function in BIOS Setup to setting CPU Host clock step
by step increasing let users to approach over clocking, and special design in
hardware to protect BIOS from virus crash BIOS data.

V333U provides high performance & meets future specification demand. It is really
wise choice for your computer.

3

1-2 Specification

Spec Description

Design

∗

ATX form factor 4 layers PCB size: 30.5x21.0cm

Chipset

∗

VIA KT333/VT8235 Chipset

CPU Socket

∗

Support AMD Athlon 700MHz∼1.4GHz processor

∗

Support AMD Duron 600MHz∼1.3GHz processor

∗

Support AMD Athlon XP1500+~XP2200+ processor

∗

Support 200MHz/266MHz (Double Data Rate) Front

Side Bus frequency processors

∗

Reserves support for future AMD Athlon/Duron /Athlon

XP processors

Memory Socket

∗

184-pin DDR module socket x3

∗

Support DDR266/DDR200/DDR333 DDR SDRAM

∗

Expandable to 3.0GB

Expansion Slot &
Headers

∗

AGP slot x1 support AGP 2.0 & 4X mode

∗

32-bit PCI slot x5

∗

CNR slot x1

Integrate IDE

∗

Two PCI IDE controllers support PCI Bus Mastering,
ATA PIO/DMA and the ULTRA DMA 33/66/100/133
functions that deliver the data transfer rate up to 133
MB/s

Audio

∗

AC’97 Digital Audio controller integrated

∗

AC’97 Audio CODEC on board

∗

Audio driver and utility included

∗

Support 4 channel Speaker for 3D surround effect

BIOS

∗

Award 2MBit Flash ROM

Multi I/O

∗

PS/2 keyboard and PS/2 mouse connectors

∗

Floppy disk drive connector x1

∗

Parallel port x1

∗

Serial port x2

∗

USB2.0 connector x2

∗

USB2.0 headers x2 (connecting cable option)

∗

Audio connector (Line-in, Line-out , MIC & Game Port)

4

1-3 Performance List

The following performance data list is the testing result of some popular benchmark
testing programs. These data are just referred by users, and there is no responsibility
for different testing data values gotten by users (the different Hardware & Software
configuration will result in different benchmark testing results.)

Performance Test Report

CPU: AMD Athlon XP 2000+

DRAM: 256MB DDR266 X1 (SAMSUNG DDR K4H280838B-TCB0)

256MB DDR333 X1 (MICRON DDR MT46V16M8-6)

VGA Expansion Card: NVDIA Geforce 2 MX400 (1024x768 Hi-color)

Hard Disk Driver: IBM DTLA-305040 (ATA-100)

BIOS: Award Optimal default

OS: Win 98SE

DDR266 DDR333

3D Mark 2000 5678 5687
3D Mark 2001 2554 2550
3D Winbench 2000 105 105
Final Reality 10.34 10.39
Content Creation Winstone 2000 50 50.3
Content Creation Winstone 2001 63.6 64.5
Content Creation Winstone 2002 23.6 23.9
Business Winstone2001 53.9 53.7

Winbench 99:

CPU Mark 99 152 151
FPU Winmark 99 9140 9140
Business Disk Winmark99 7440 7690
Hi-end Disk Winmark99 19600 19400
Business Graphic Winmark 794 790
Hi-end Graphic Winmark 2390 2400

SYS Mark 2000/2001 : SISMark 2000/2001 Rating (Internet Content
Creation / Office Productivity)

SISMark 2000 282 (298/270) 285 (302/272)
SISMark 2001 166 (178/154) 171 (180/163)

SISOFT Sandra 2001 :

Dhrystone ALU MIPS

4640 4657

Whetstone FPU MFLOPS

2280 2303

Int ALU/RAM MB/S

761 827

Float FPU/RAM MB/S

804 892

Integer SSE2 IT/S

9320 9302

Floating- Point SSE2 MB/S

10706 10780

QUAKE3 DEMO1 FPS

178.9 185.2

5

DEMO2 FPS

186.5 191.9

WCPUID System/CPU Clock

133.79/1672.32 133.79/1672.32

1-4 Layout Diagram & Jumper Setting

COM1 COM2

PS/2 Mouse

PS/2 Keyboard

USB

LINE-OUT

LINE-IN

MIC

PRINT GAME/MIDI PORT

Winbond 83697HF

Chip

IR Connector

CNR Slot

Front Panel Audio

PC99 Back Panel

CD Audio

PCI Slo

t

AGP Slot

K/B Power ON

Jumper (JP1)

FAN2

Floppy Connector

VIA KT333 Chip

Front Panel Connector

ATA 133 IDE
Connector

Clear CMOS

(JBAT)

ATX Power
Connector

CPU FAN

2MBit Flash ROM BIOS

(JP6)

CPU Ratio Selector

CPU Socket

DDR Socket X3

VIA VT8235 Chip

Wake On LAN

FAN1

CPU Front Side Bus

Frequency Jumper (JP4)

PS2 KB/Mouse Port

USB Port

6

Jumpers

Jumper Name Description Page

JP6 CPU Ratio Selector 10-pin Block P.7
JP4 CPU Front Side Bus Frequency 4-pin Block P.8
JBAT CMOS RAM Clear 3-pin Block P.8
JP1 Keyboard Power On Enable/Disabled 3-pin Block P.9

Connectors

Connector Name Description Page

ATXPOW ATX Power Connector 20-pin Block P.13
J2 PS/2 Mouse & PS/2 Keyboard

Connector

6-pin Female P.14

J3 USB Port Connector 4-pin Connector P.14
PARALLEL Parallel Port Connector 25-pin Female P.14
AUD_GAME Audio/Game Connector 3 phone jack + 15-pin Connector P.14
COM1/COM2 Serial Port COM1/2 Connector 9-pin Connector P.14
FDD Floppy Driver Connector 34-pin Block P.14
IDE1 Primary IDE Connector 40-pin Block P.15
IDE2 Secondary IDE Connector 40-pin Block P.15

Headers

Header Name Description Page

AUDIO Line-In/Out, MIC header 9-pin Block P.16
USB1/USB2 USB Port Headers 9-pin Block P.16
IDE LED IDE activity LED 2-pin Block P.16
TB LED Turbo LED switch 2-pin Block P.16
RESET Reset switch lead 2-pin Block P.17
SPEAKER Speaker connector 4-pin Block P.17
PWR LED

Power LED 2-pin Block P.17
PW BN Power switch 2-pin Block P.17
WOL Wake On-LAN Headers 3-pin Block P.17
FAN1,FAN2,CPUFAN FAN Headers 3-pin Block P.18
IR IR infrared module Headers 5-pin Block P.18
CDIN1 CD Audio-In Headers 4-pin Block P.18

Expansion Sockets

Socket/Slot Name Description Page

ZIF Socket 462 CPU Socket 462-pin PPGA CPU Socket P.10
DDR1, DDR2, DDR3 DDR SDRAM Module

Socket

184-pin DDR SDRAM Module
Expansion Socket

P.11

PCI1, PCI2, PCI3,
PCI4, PCI5

PCI Slot 32-bit PCI Local Bus Expansion slots P.12

AGP AGP 4X Mode Slot AGP Expansion Slot P.13

USB Port

(USB1, USB2)

7

Chapter 2

Hardware installation

2-1 Hardware installation Steps

Before using your computer, you had better complete the following steps:

1. Check motherboard setting

2. Install CPU

3. Install Memory

4. Install Expansion cards

5. Connect Ribbon cables, Panel wires, and power supply

6. Setup BIOS

7. Install software driver & utility

2-2 Checking Motherboard’s Jumper Setting

1. CPU Ratio Selector (10-pin) : JP6

Ratio

1 2 3 4 5 Ratio 1 2 3 4 5

5.0x ON ON ON OFF ON 9.0x ON ON ON OFF OFF

5.5x ON OFF ON OFF ON 9.5x ON OFF ON OFF OFF

6.0x ON ON OFF OFF ON 10.0x ON ON OFF OFF OFF

6.5x ON OFF OFF OFF ON 10.5x ON OFF OFF OFF OFF

7.0X ON ON ON ON OFF 11.0x ON ON ON ON ON

7.5x ON OFF ON ON OFF 11.5x ON OFF ON ON ON

8.0x ON ON OFF ON OFF 12.0x ON ON OFF ON ON

8.5x ON OFF OFF ON OFF 12.5x ON OFF OFF ON ON

CPU Ratio Selector

JP6

1

2

3

4

5

8

2. CPU Front Side Bus Frequency Setting (4-pin) : JP4

CPU Front Side Bus Frequency Setting

1-2 : 100MHz

(Default)

JP4

1

4

2-3 : 133MHz

JP4

1

4

3-4 : 166MHz

JP4

1

4

Note: CPU Front Side Bus Frequency also can setting step by step in BIOS SETUP,

please refer page 35 Miscellaneous Control in Host Clock at Next.

3. CMOS RAM Clear (3-pin) : JBAT

A battery must be used to retain the motherboard configuration in CMOS RAM short
1-2 pins of JBAT to store the CMOS data.

To clear the CMOS, follow the procedure below:

1. Turn off the system and unplug the AC power

2. Remove ATX power cable from ATX power connector

3. Locate JBAT and short pins 2-3 for a few seconds

4. Return JBAT to its normal setting by shorting pins 1-2

5. Connect ATX power cable back to ATX power connector

Note: When should clear CMOS

1. Troubleshooting

2. Forget password

3. After over clocking system boot fail

CMOS RAM Clear Setting

2-3 closed Clear CMOS

JBAT

1 3

JBAT

1 3

1-2 closed Normal

4. Keyboard Power On function Enabled/Disabled: JP1

When setting Enabled you can using keyboard by key in password to power on system.

9

Keyboard Power On Setting

2-3 closed K/B Power ON Enabled

JP1

1 3

JP1

1 3

1-2 closed K/B Power ON Disable

(

Default)

2-3 Install CPU

2-3-1 Glossary

Chipset (or core logic) - two or more integrated circuits which control the interfaces
between the system processor, RAM, I/O devises, and adapter cards.

Processor slot/socket - the slot or socket used to mount the system processor on the
motherboard.

Slot (AGP, PCI, ISA, RAM) - the slots used to mount adapter cards and system RAM.
AGP - Accelerated Graphics Port - a high speed interface for video cards; runs at 1X

(66MHz), 2X (133MHz), or 4X (266MHz).
PCI - Peripheral Component Interconnect - a high speed interface for video cards, sound

cards, network interface cards, and modems; runs at 33MHz.
ISA - Industry Standard Architecture - a relatively low speed interface primarily used for

sound cards and modems; runs at approx. 8MHz.

Serial Port - a low speed interface typically used for mouse and external modems.

Parallel Port - a low speed interface typically used for printers.

PS/2 - a low speed interface used for mouse and keyboards.

USB - Universal Serial Bus - a medium speed interface typically used for mouse, keyboards,

scanners, and some digital cameras.

Sound (interface) - the interface between the sound card or integrated sound connectors and
speakers, MIC, game controllers, and MIDI sound devices.

LAN (interface) - Local Area Network - the interface to your local area network.

BIOS (Basic Input/Output System) - the program logic used to boot up a computer and

establish the relationship between the various components.

Driver - software, which defines the characteristics of a device for use by another device or
other software.

Processor - the "central processing unit" (CPU); the principal integrated circuit used for
doing the "computing" in "personal computer"

Front Side Bus Frequency - the working frequency of the motherboard, which is generated
by the clock generator for CPU, DRAM and PCI BUS.

CPU L2 Cache - the flash memory inside the CPU, normally Athlon CPU has 256K or
above, while Duron will have 64K.

10

2-3-2 About AMD Athlon & Duron 462-pin CPU

This motherboard supports Socket-A (Socket-462) AMD Athlon/Duron processors.

This motherboard Provides a ZIF Socket-A. The CPU that comes with the motherboard
should have a cooling FAN attached to prevent overheating. If this is not the case, then
purchase a correct cooling FAN before you turn on your system.

WARNING! Be sure that there is sufficient air circulation across the processor’s heatsink

and CPU cooling FAN is working correctly, otherwise it may cause the
processor and motherboard overheat and damage, you may install an
auxiliary cooling FAN, if necessary.

WARNING! Due to this motherboard provides new function of protecting CPU；you

must connect the CPU FAN connector on FAN1 location in order to obtain
this feature. Without connection on FAN1 (or you have connect CPU FAN
on FAN2), the system will shut down immediately to protect both your CPU
and motherboard.

Over heat Protect: Only for Athlon XP serial CPU, when the CPU overheat, system will

auto shut down power supply. You can hear a continue beep sound, the
power button will be locked up. Users must turn off and turn on the AC
power to reset the system otherwise the power button will no function,
the other way is keeping press the push button few seconds till the beep
sound stop, then release the power button and press the power button
again to turn on the power supply.

To install a CPU, first turn off your system and remove its cover. Locate the ZIF socket
and open it by first pulling the level sideways away from the socket then upward to a 90­degree angle. Insert the CPU with the correct orientation as shown below. The notched
corner should point toward the end of the level. Because the CPU has a corner pin for two
of the four corners, the CPU will only fit in the orientation as shown.

CPU ZIF Socket-A

Colden Arrow

Socket-A

AMD

When you put the CPU into the ZIF socket. No force require to insert of the CPU, then
press the level to Locate position slightly without any extra force.

11

2-4 Install Memory

This motherboard provides three 184-pin DUAL INLINE MEMORY MODULES (DIMM)
sites for memory expansion available from minimum memory size of 64MB to maximum
memory size of 3.0GB DDR SDRAM.

Valid Memory Configurations

Bank 184-Pin DIMM Total Memory

Bank 0, 1 (DDR1) PC1600/PC2100/PC2700 DDR SDRAM X1 64MB∼1.0GB
Bank 2, 3 (DDR2) PC1600/PC2100/PC2700 DDR SDRAM X1 64MB∼1.0GB
Bank 4, 5 (DDR3) PC1600/PC2100/PC2700 DDR SDRAM X1 64MB∼1.0GB

Total System Memory (Max. 3.0GB) 3 64MB∼3.0GB

NOTE!

Make sure the total installed memory does not exceeds 3.0GB, otherwise the
system may hang during startup.

Generally, installing DDR SDRAM modules to your motherboard is very easy, you can
refer to figure 2-4 to see what a 184-Pin PC1600/PC2100/PC2700 DDR SDRAM module
looks like.

DDR2 (BANK2+BANK3)

DDR1 (BANK0+BANK1)

DDR3 (BANK4+BANK5)

NOTE!

When you install DIMM module fully into the DIMM socket the eject tab
should be locked into the DIMM module very firmly and fit into its
indention on both sides.

WARNING!

For the DDR SDRAM CLOCK is set at 166MHz, use only PC2700­compliant DDR Modules. When this motherboard operate at 133Mhz,
most system will not even boot if non-compliant modules are used because
of the strict timing issues, if your DDR Modules are not PC2100­compliant, set the DDR SDRAM clock to 100MHz to ensure system
stability.

Figure 2-4

12

2-5 Expansion Cards

WARNING!

Turn off your power 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.

2-5-1 Procedure For Expansion Card Installation

1. Read the documentation for your expansion card and make any necessary hardware or
software setting for your expansion card such as jumpers.

2. Remove your computer’s cover and the bracket plate on the slot you intend to use.

3. Align the card’s connectors and press firmly.

4. Secure the card on the slot with the screen you remove above.

5. Replace the computer system’s cover.

6. Set up the BIOS if necessary.

7. Install the necessary software driver for your expansion card.

2-5-2 Assigning IRQs For Expansion Card

Some expansion cards need an IRQ to operate. Generally, an IRQ must exclusively assign
to one use. In a standard design, there are 16 IRQs available but most of them are already
in use.

Standard Interrupt Assignments

IRQ Priority Standard function

0 N/A System Timer
1 N/A Keyboard Controller
2 N/A Programmable Interrupt
3 * 8 Communications Port (COM2)
4 * 9 Communications Port (COM1)
5 * 6 Sound Card (sometimes LPT2)
6 * 11 Floppy Disk Controller
7 * 7 Printer Port (LPT1)
8 N/A System CMOS/Real Time Clock

9 * 10 ACPI Mode when enabled
10 * 3 IRQ Holder for PCI Steering
11 * 2 IRQ Holder for PCI Steering
12 * 4 PS/2 Compatible Mouse Port
13 N/A Numeric Data Processor
14 * 5 Primary IDE Channel
15 * 1 Secondary IDE Channel

* These IRQs are usually available for ISA or PCI devices.