Msi MS-6577 user Manual

Getting Started

Chapter 1. Getting Started

Getting Started

Thank you for purchasing the MS-6577 v2.X Micro ATX mainboard.
The MS-6577 is based on Intel® Brookdale-G/GE & ICH4 chipsets for optimal
system efficiency. Designed to fit the advanced Intel® P4 Williamette and
Northwood processors in 478-pin package, the MS-6577 delivers a high per­formance and professional desktop platform solution.

TOPICS

Mainboard Specification 1-2
Mainboard Layout 1-4
Quick Components Guide 1-5

1

1-1

Chapter 1

Mainboard Specification

CPU

h Supports Socket 478 for Intel® P4 Williamette and Northwood processors.
h Supports 1.4GHz to 2.8GHz or higher speed.

Chipset

h Intel® 845G/GE chipset

- FSB 400/533MHz.

- Multiplexed AGP interface.

- Integrated 3D/2D graphic core.

- Supports DDR 333 (for 845GE only)/266/200 memory.

h Intel® ICH4 chipset

- Hi-Speed USB (USB2.0) controller, 480Mb/sec.

- AC’97 3 Codec supported.

- Supports both ACPI and legacy APM power management.

Main Memory

h Supports four memory banks using two 184-pin unbuffered DIMM.
h Maximum memory size is 2GB without ECC (1GB/slot).
h Supports 2.5V DDR DIMM.

Slots

h Three 32-bit Master PCI (Peripheral Component Interconnect) Bus slots.
h One AGP (Accelerated Graphics Port) slot.

Onboard IDE

h An IDE controller on the ICH4 chipset provides IDE HDD/CD-ROM with

PIO, Bus Master and Ultra DMA100/66 operation modes.

h Can connect up to four IDE devices.

Onboard Peripherals

h Onboard peripherals include:

- 2 PS/2 Ports

- 6 USB Ports (Rear x 4 /Front x 2)

- 1 Parallel Port + 1 Serial Port + 1 VGA Port

- 2 IEEE1394 Ports (Rear x 1 /Front x 1)

1-2

- 1 RJ-45 LAN Port

- Vertical Audio Ports (Line_in, Line_out, Mic_in)

- IDE x 2 (AT A100), Floppy x 1, ATX power connector

- AUX_IN x 1/ MIC_IN x 1

- MSI S-Bracket connector x 1

- Internal speaker pinheader x 1

- Front panel pinheader x 1

- CPU_F AN x 1/ SYS_F AN x 1

- Clear password pinheader x 1

- Clear CMOS pinheader x 1

Audio

h AC’97 link controller integrated in ICH4.
h Six-channel software codec RealT ek ALC 650 (Optional).

LAN

h RealTek R TL8101L chip

- Integrated Fast Ethernet MAC and PHY in one chip.

- Supports 10 Mb/s and 100 Mb/s.

- Compliance with PCI v2.2.

- Supports ACPI Power Management.

Getting Started

BIOS

h PnP (Plug & Play) BIOS to detect peripheral devices and expansion cards

automatically.

h DMI (Desktop Management Interface) function to record motherboard

specifications.

Dimension

h Micro-ATX Form Factor: 9.6" x 9.1"

Mounting

h 6 mounting holes.

1-3

Chapter 1

Mainboard Layout

Top: mouse
Bottom: keyboard

T: 1394 port
B: USB ports

Top:
Parallel Port

Bottom:
COM A
VGA Port

T: LA N j ac k
B: USB ports

Line-In
Line-Out
Mic

RealTek

RTL8101L

JSP1

JCD1

JAUX1

C_FAN1

845G/GE

AGP Slot

Intel

Chipset

S_FAN1

Winbond

W83627HF-AW

JPW2

PCI Slot 1

PCI Slot 2

PCI Slot 3

JSPD2

JFMIC

MS-6577 v2.X Micro A TX Mainboard

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1

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Intel

ICH4

D

JPWD1

BIOS

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BATT

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JBAT1

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MSI Reminds Y ou...

Enabling the functionality of Hyper-Threading Technology for
your computer system requires ALL of the following platform
Components:
*CPU: An Intel® Pentium® 4 Processor with HT Technology;
*Chipset: An Intel® Chipset that supports HT Technology;
*BIOS: A BIOS that supports HT T echnology and has it enabled;
and
*OS: An operating system that supports HT Technology.
For more information on Hyper-threading Technology, go to:

http://www.intel.com/info/hyperthreading

1-4

Getting Started

Quick Components Guide

Component Function Reference
Socket 478 Installing CPU See p. 2-2
DDR1~2 Installing DDR modules See p. 2-6
ATX Power Connector Installing power supply See p. 2-8
IEEE 1394 Port Connecting to 1394 devices See p. 2-10
USB Ports Connecting to USB devices See p. 2-10
COM A Serial port connector See p. 2-11
VGA Connector Connecting to VGA monitors See p. 2-11
LPT1 Parallel port connector See p. 2-12
RJ-45 LAN Jack Connecting to LAN devices See p. 2-13
FDD1 Floppy disk drive connector See p. 2-14
JSP1 Internal speaker connector See p. 2-14
PRIMAR1/SECON1 Hard disk connectors See p. 2-15
JCD1 CD-in connector See p. 2-16
JAUX1 AUX-in connector See p. 2-16
C_FAN1/S_FAN1 Fan power connectors See p. 2-17
JFP1 Front panel connector See p. 2-18
JUSB1 Front USB connector See p. 2-19
JFMIC Front microphone connector See p. 2-20
JSPD2 S-Bracket connector See p. 2-21
J1394_2 IEEE 1394 connector See p. 2-22
JBAT1 Clear CMOS jumper See p. 2-23
JPWD1 Clear BIOS password jumper See p. 2-24
AGP Slot Connecting to VGA cards See p. 2-25
PCI Slots Connecting to expansion cards See p. 2-25

1-5

Hardware Setup

Chapter 2. Hardware Setup

Hardware Setup

This chapter provides you with the information about hardware setup
procedures. While doing the installation, be careful in holding the components
and follow the installation procedures. For some components, if you install in
the wrong orientation, the components will not work properly.

Use a grounded wrist strap before handling computer components. Static
electricity may damage the components.

TOPICS

Central Processing Unit: CPU 2-2
Memory 2-6
Power Supply 2-8
Back Panel 2-9
Connectors 2-14
Jumpers 2-23
Slots 2-25

2

2-1

Chapter 2

Central Processing Unit: CPU

The mainboard supports Intel® Pentium® 4 processor in the 478 pin
package. The mainboard uses a CPU socket called PGA478 for easy CPU
installation. When you are installing the CPU, make sure the CPU has a heat
sink and a cooling fan attached on the top to prevent overheating. If you do not
find the heat sink and cooling fan, contact your dealer to purchase and install
them before turning on the computer.

CPU Core Speed Derivation Procedure

If CPU Clock = 100MHz

Core/Bus ratio = 1 4

then CPU core speed = Host Clock x Core/Bus ratio

= 100MHz x 14
= 1.4 GHz

MSI Reminds Y ou...

Overheating

Overheating will seriously damage the CPU and system, al­ways make sure the cooling fan can work properly to protect
the CPU from overheating.

Replacing the CPU

While replacing the CPU, always turn off the ATX power sup­ply or unplug the power supply’s power cord from grounded
outlet first to ensure the safety of CPU.

2-2

CPU Installation Procedures for Socket 478

1. Please turn off the power and
unplug the power cord before
installing the CPU.

Open Lever

Hardware Setup

2. Pull the lever sideways away
from the socket. Make sure to
raise the lever up to a 90-de­gree angle.

3. Look for the gold arrow. The
gold arrow should point to­wards the lever pivot. The
CPU can only fit in the correct
orientation.

4. If the CPU is correctly
installed, the pins should be
completely embedded into the
socket and can not be seen.
Please note that any violation
of the correct installation pro­cedures may cause permanent
damages to your mainboard.

5. Press the CPU down firmly into
the socket and close the lever.
As the CPU is likely to move
while the lever is being closed,
always close the lever with
your fingers pressing tightly
on top of the CPU to make sure
the CPU is properly and com­pletely embedded into the
socket.

Sliding

Plate

Gold arrow

Gold arrow

Gold arrow

Press down

the CPU

90 degree

Correct CPU placem ent

Incorrect CPU place men t

O

X

Close
Lever

2-3

Chapter 2

Installing the CPU Fan

As processor technology pushes to faster speeds and higher
performance, thermal management becomes increasingly important. T o dissi­pate heat, you need to attach the CPU cooling fan and heatsink on top of the
CPU. Follow the instructions below to install the Heatsink/Fan:

1. Locate the CPU and its retention

mechanism on the motherboard.

retention mechanism

3. Mount the fan on top of the heatsink.

Press down the fan until its four clips
get wedged in the holes of the reten­tion mechanism.

2. Position the heatsink onto the reten-

tion mechanism.

4. Press the two levers down to fasten

the fan. Each lever can be pressed
down in only ONE direction.

levers

2-4

Hardware Setup

5.

Connect the fan power cable from the mounted fan to the 3-pin fan power connector
on the board.

fan power cable

NOTES

2-5

Chapter 2

Memory

The mainboard provides 2 slots for 184-pin, 2.5V DDR DIMM with 4
memory banks. You can install DDR333/PC2700 (for 845GE chipset only),
DDR266/PC2100, or DDR200/PC1600 DDR SDRAM modules on the DDR DIMM
slots (DDR 1~2). To operate properly, at least one DIMM module must be
installed.

DDR1

DDR2

Introduction to DDR SDRAM

DDR (Double Data Rate) SDRAM is similar to conventional SDRAM,
but doubles the rate by transferring data twice per cycle. It uses 2.5 volts as
opposed to 3.3 volts used in SDR SDRAM, and requires 184-pin DIMM mod­ules rather than 168-pin DIMM modules used by SDR SDRAM. High memory
bandwidth makes DDR an ideal solution for high performance PC, worksta­tions and servers.

2-6

Hardware Setup

DDR Module Combination

You can install either single-sided or double-sided 184-pin DDR DIMM
modules into DDR DIMM slots to meet your needs. Different from the SDR
DIMM, the DDR DIMM has only one notch on the center of module. The
number of pins on either side of the breaks are different. The module will only
fit in the right orientation.

You can install memory modules in any combination as follows:

Slot Memory Module Total Memory

DIMM 1
(Bank 0 & 1)
DIMM 2
(Bank 2 & 3)

Maximum System Memory Supported

S/D 64MB~1GB

S/D 64MB~1GB

64MB~2GB

S: Single Side D: Double Side

Installing DDR Modules

1. The DDR DIMM has only one notch on the center of module. The module

will only fit in the right orientation.

2. Insert the DIMM memory module vertically into the DIMM slot. Then

push it in until the golden finger on the memory module is deeply inserted
in the socket.

3. The plastic clip at each side of the DIMM slot will automatically close.

Volt

TIP: Y ou can bar ely see the golden finger if the module is deeply inserted in the
socket.

2-7

Notch

Chapter 2

Power Supply

The mainboard supports ATX power supply for the power system. Be­fore inserting the power supply connector, always make sure that all compo­nents are installed properly to ensure that no damage will be caused.

A TX 20-Pin Power Supply: CONN1

This connector allows you to connect to an ATX power supply. To
connect to the ATX power supply, make sure the plugs of the power supply is
inserted in the proper orientation and the pins are aligned. Then push down
the power supply firmly into the connector. The power connector supports
instant power on function which means that system will boot up immediately
when the power supply connector is inserted on the board.

A TX 12V Power Connector: JPW2

This 12V power connector is used to provide power to the CPU.

10

20

JPW2

2

1
3

4

JPW2 Pin Definition

PIN SIGNAL

1 GND
2 GND
312V
412V

CONN1 Pin Definition

PIN SIGNAL

1 3.3V
2 3.3V
3 GND
45V
5 GND
65V
7 GND
8 PW_OK
9 5V_SB
10 12V

2-8

1

CONN1

PIN SIGNAL

1 1 3.3V
12 -12V
13 GND
14 PS_ON
15 GND
16 GND
17 GND
18 -5V
19 5V
20 5V

11

Back Panel

The Back Panel provides the following connectors:

Hardware Setup

Mouse

1394

Parallel

LAN

L-In

L-Out

MIC

Keyboard USB

COM A

VGA USB

Mouse/Keyboard Connector

The mainboard provides a standard PS/2® mouse/keyboard mini DIN
connector for attaching a PS/2® mouse/keyboard. Y ou can plug a PS/2® mouse/
keyboard directly into this connector. The connector location and pin assign­ments are as follows:

Pin Definition

6

4

2

5

3

1

PS/2 Mouse/Keyboard

(6-pin Female)

PIN SIGNAL DESCRIPTION

1 Mouse/Keyboard Data Mouse/Keyboard data
2 NC No connection
3 GND Ground
4 VCC +5V
5 Mouse/Keyboard Clock Mouse/Keyboard clock
6 NC No connection

2-9

Chapter 2

IEEE 1394 Port

The 6-pin IEEE 1394 port is used to connect 1394-compatible external
devices via 6-pin to 6-pin or 6-pin to 4-pin 1394 cables.

Pin Definition

PIN SIGNAL

6

12345

IEEE 1394 Port

1 PWR
2 GND
3 TPB­4 TPB+
5TPA­6TPA+

USB Ports

The back panel provides four UHCI (Universal Host Controller Interface)
USB (Universal Serial Bus) 2.0 ports for attaching USB devices such as keyboard,
mouse or other USB-compatible devices. You can plug USB devices directly
into the ports.

1 2 3 4

USB Port

Pin Definition

PIN SIGNAL DESCRIPTION

1 VCC +5V
2 -Data 0 Negative Data Channel 0
3 +Data0 Positive Data Channel 0
4 GND Ground

2-10

Hardware Setup

Serial Port: COM A

The mainboard provides one 9-pin male DIN serial port COM A. Y ou can
attach a serial mouse or other serial devices to this port.

1 2 3 4 5

Pin Definition

PIN SIGNAL DESCRIPTION

1 DCD Data Carry Detect

6 7 8 9

9-Pin Serial Port

2 SIN Serial In or Receive Data
3 SOUT Serial Out or Transmit Data
4 DTR Data Terminal Ready
5 GND Ground
6 DSR Data Set Ready
7 RTS Request To Send
8 CTS Clear T o Send
9 RI Ring Indicate

VGA DB 15 Pin Connector

One DB 15-pin VGA connector is provided for connection to a VGA
monitor.

Pin Definition

Analog Video Display Connector (DB-15S)
PIN SIGNAL DESCRIPTION

1 Red

5 1

15 11

DB 15-Pin Female Connector

2 Green
3 Blue
4 Not used
5 Ground
6 Ground
7 Ground
8 Ground
9 Power
10 Ground
1 1 Not used
12 SDA
13 Horizontal Sync
14 Vertical Sync
15 SCL

2-11

Chapter 2

Audio Port Connectors

Line Out is a connector for Speakers or Headphones. Line In is used for

external CD player, Tape player, or other audio devices. Mic is a connector for
microphones.

1/8” Stereo Audio Connectors

Line In

Line Out

MIC

RJ-45 LAN Jack

The mainboard provides one standard RJ-45 jack for connection to Local
Area Network (LAN). Y ou can connect a network cable to the LAN jack.

RJ-45 LAN Jack

8 1

PIN SIGNAL DESCRIPTION

1 TDP Transmit Differential Pair
2 TDN Transmit Differential Pair
3 RDP Receive Differential Pair
4 NC Not Used
5 NC Not Used
6 RDN Receive Differential Pair
7 NC Not Used
8 NC Not Used

Pin Definition

2-12

Hardware Setup

Parallel Port Connector: LPT1

The mainboard provides a 25-pin female centronic connector as LPT. A
parallel port is a standard printer port that supports Enhanced Parallel Port
(EPP) and Extended Capabilities Parallel Port (ECP) mode.

13 1

25

14

Pin Definition

PIN SIGNAL DESCRIPTION

1 STROBE Strobe
2 DAT A0 Data0
3 DAT A1 Data1
4 DAT A2 Data2
5 DAT A3 Data3
6 DAT A4 Data4
7 DAT A5 Data5
8 DAT A6 Data6
9 DAT A7 Data7
10 ACK# Acknowledge
11 BUSY Busy
12 PE Paper End
13 SELECT Select
14 AUTO FEED# Automatic Feed
15 ERR# Error
16 INIT# Initialize Printer
17 SLIN# Select In
18 GND Ground
19 GND Ground
20 GND Ground
21 GND Ground
22 GND Ground
23 GND Ground
24 GND Ground
25 GND Ground

2-13

Chapter 2

Connectors

The mainboard provides connectors to connect to FDD, IDE HDD, case,

modem, LAN, USB Ports, IR module and CPU/System F AN.

Floppy Disk Drive Connector: FDD1

The mainboard provides a standard floppy disk drive connector that

supports 360K, 720K, 1.2M, 1.44M and 2.88M floppy disk types.

FDD1

Internal Speaker Connector: JSP1

This connector is used to connect the internal speaker if available.

JSP1

SPKR

GND

SPKL

2-14

Hardware Setup

Hard Disk Connectors: PRIMAR1 & SECON1

The mainboard has a 32-bit Enhanced PCI IDE and Ultra DMA 33/66/100
controller that provides PIO mode 0~4, Bus Master, and Ultra DMA33/66/100
function. Y ou can connect up to four hard disk drives, CD-ROM, 120MB Floppy
(reserved for future BIOS) and other devices. These connectors support the
provided IDE hard disk cable.

SECON1

PRIMAR1 (Primary IDE Connector)
The first hard drive should always be connected to IDE1. IDE1 can

connect a Master and a Slave drive. You must configure second hard
drive to Slave mode by setting the jumper accordingly.

SECON1 (Secondary IDE Connector)
IDE2 can also connect a Master and a Slave drive.

TIP:

If you install two hard disks on cable, you must configure the
second drive to Slave mode by setting its jumper. Refer to the
hard disk documentation supplied by hard disk vendors for jumper
setting instructions.

PRIMAR1

2-15

Chapter 2

CD-In Connector: JCD1

The connector is for CD-ROM audio connector.

Aux Line-In Connector: JAUX1

The connector is for DVD add-on card with Line-in connector.

JCD1

R

GND

L

GND

JAUX1

R

L

2-16

Hardware Setup

Fan Power Connectors: C_F AN1/S_F AN1

The C_FAN1 (processor fan) & S_FAN1 (system fan) support system
cooling fan with +12V. It supports three-pin head connector. When connect­ing the wire to the connectors, always take note that the red wire is the positive
and should be connected to the +12V, the black wire is Ground and should be
connected to GND.

GND
+12V
SENSOR

C_FAN1

SENSOR

+12V

GND

S_FAN1

Note: Always consult the vendor for proper CPU cooling fan.

2-17

Chapter 2

Front Panel Connector: JFP1

The mainboard provides one front panel connector for electrical connec­tion to the front panel switches and LEDs. The JFP1 is compliant with Intel
Front Panel I/O Connectivity Design Guide.

JFP1

910

Power
Switch

Power
LED

Reset
Switch

+

HDD
LED

12

®

Pin Definition

PIN SIGNAL DESCRIPTION

1 HD_LED_P Hard disk LED pull-up
2 FP PWR/SLP MSG LED pull-up
3 HD_LED_N Hard disk active LED
4 FP PWR/SLP MSG LED pull-up
5 RST_SW_N Reset Switch low reference pull-down to GND
6 PWR_SW_P Power Switch high reference pull-up
7 RST_SW_P Reset Switch high reference pull-up
8 PWR_SW_N Power Switch low reference pull-down to GND
9 NC No connection

2-18

Hardware Setup

Front USB Connector: JUSB1

The mainboard provides one USB 2.0 pinheader for connection to USB
devices. USB 2.0 technology increases data transfer rate up to a maximum
throughput of 480Mbps, which is 40 times faster than USB 1.1, and is ideal for
connecting high-speed USB interface peripherals such as USB HDD, digital
cameras, MP3 players, printers, modems and the like.

JUSB1

10

9

Pin Definition

Pin Description Pin Description

1 VCC 2 VCC
3 USB P4- 4 USB P5­5 USB P4+ 6 USB P5+
7 GND 8 GND
9 KEY 10 NC

2-19

1

2

Chapter 2

Front Microphone Connector: JFMIC

This connector is used to connect the front panel microphone if available.

JFMIC

1 3

Pin Definition

PIN SIGNAL DESCRIPTION

1 FMIC Front Microphone
2 GND Ground
3 VCC VCC5V

2-20

Hardware Setup

S-Bracket Connector: JSPD2

This connector allows you to connect the optional S-Bracket for Sony &
Philips Digital Interface (SPDIF). The S-Bracket offers 2 SPDIF jacks for digital
audio transmission (one for optical fiber connection and the other for coaxial),
and 2 analog Line-Out jacks for 4-channel audio output.

T o attach the fiber-optic cable to optical SPDIF jack, you need to remove
the plug from the jack first. The two SPDIF jacks support SPDIF output only.
For more information on the S-Bracket, refer to Appendix. Using 4- or 6-Chan-
nel Audio Function.

JSPD2

1 11

2 12

Pin Definition

PIN SIGNAL DESCRIPTION PIN SIGNAL DESCRIPTION

1 VCC5 VCC 5V 2 VDD3 VDD 3.3V
3 SPDFO S/PDIF output 4 (No Pin) Key
5 GND Ground 6 SPDFI S/PDIF input
7 LFE-OUT Audio bass output 8 SOUT-R Audio right surrounding output
9 CET-OUT Audio center output 10 SOUT-L Audio left surrounding output
11 GND Ground 12 GND Ground

S-Bracket (optional)

SPDIF jack (optical)

Plug

CEN/SUB

SPDIF jack (coaxial)

RL/RR

2-21

Analog Line-Out
jacks

Chapter 2

IEEE 1394 Connector: J1394_2

The mainboard provides one 1394 pinheader that allows you to connect
additional IEEE 1394 devices.

J1394_2

1 9

10

2

Pin Definition

PIN SIGNAL PIN SIGNAL

1TPA+ 2 TPA­3 Ground 4 Ground
5 TPB+ 6 TPB­7 Cable power 8 Cable power
9 Key (no pin) 10 Ground

2-22

Hardware Setup

Jumpers

The motherboard provides one jumper for you to set the computer’s
function. This section will explain how to change your motherboard’s function
through the use of the jumper.

Clear CMOS Jumper: JBA T1

There is a CMOS RAM on board that has a power supply from external
battery to keep the data of system configuration. With the CMOS RAM, the
system can automatically boot OS every time it is turned on. That battery has
long life time for at least 5 years. If you want to clear the system configuration,
use the JBAT1 (Clear CMOS Jumper ) to clear data. Follow the instructions
below to clear the data:

WARNING!

1

JBAT1

1

3

Keep CMOS Clear CMOS

1

3

To clear CMOS, first make the #2-3 pin short con­nected after the system is off. And then power on the
system and short connect #1-2 pin before entering the
BIOS (Standard CMOS Features) to clear data.

2-23

Chapter 2

Clear BIOS Password Jumper: JPWD1

The jumper is used to clear the BIOS password. To clear the password,
open the jumper and restart your computer.

JPWD1

Clear

Normal

2-24

Hardware Setup

Slots

The motherboard provides three 32-bit Master PCI bus slots and one
AGP slot.

AGP Slot

PCI Slots

AGP (Accelerated Graphics Port) Slot

The AGP slot allows you to insert the AGP graphics card. AGP is an
interface specification designed for the throughput demands of 3D graphics.
It introduces a 66MHz, 32-bit channel for the graphics controller to directly
access main memory and provides three levels of throughputs: 1x (266Mbps),
2x (533Mbps) and 4x (1.07Gbps). Please especially note that, for enhanced 3D
visualization, Intel® 845 chipset supports the latest graphics devices through

1.5V AGP 4X interface. No 3.3V AGP 2X interface is supported. Installing

3.3V AGP 2X cards on Intel® 845 based mainboards will damage the mainboards.

PCI (Peripheral Component Interconnect) Slots

The PCI slots allow you to insert the expansion cards to meet your needs.
When adding or removing expansion cards, make sure that you unplug the
power supply first. Meanwhile, read the documentation for the expansion card
to make any necessary hardware or software settings for the expansion card,
such as jumpers, switches or BIOS configuration.

2-25

Chapter 2

PCI Interrupt Request Routing

The IRQ, acronym of interrupt request line and pronounced I-R-Q, are
hardware lines over which devices can send interrupt signals to the
microprocessor. The PCI IRQ pins are typically connected to the PCI bus INT
A# ~ INT H# pins as follows:

Order 1 Order 2 Order 3 Order 4
PCI Slot 1 INT F# INT G# INT H# INT E#
PCI Slot 2 INT G# INT H# INT E# INT F#
PCI Slot 3 INT D# INT A# INT B# INT C#

LAN Controller INT H# INT E#
AGP Slot INT A# INT B#
1394 Controller INT H#

2-26