Intel NX440LX User Manual

NX440LX Motherboard

Technical Product Specification

August, 1997

Order Number

The NX440LX motherboard may contain design defects or errors known as errata. Characterized errata that may cause the NX440LX motherboard’s behavior to deviate from published specifications are documented in the NX440LX Motherboard Specfication Update.

674633-001

Revision History

Revision Revision History Date

-001 First Release. August, 1997

This product specification applies only to standard NX440LX motherboards with BIOS identifier 4N4XL0X0.86A.

Changes to this specification will be published in the NX440LX Motherboard Specification Update before being incorporated into a revision of this document.

Information in this document is provided in connection with Intel products. No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this document. Except as provided in Intel's Terms and Conditions of Sale for such products, Intel assumes no liability whatsoever, and Intel disclaims any express or implied warranty, relating to sale and/or use of Intel products including liability or warranties relating to fitness for a particular purpose, merchantability, or infringement of any patent, copyright or other intellectual property right. Intel products are not intended for use in medical, life saving, or life sustaining applications.

Intel retains the right to make changes to specifications and product descriptions at any time, without notice. The NX440LX motherboard may contain design defects or errors known as errata which may cause the product to deviate from

published specifications. Current characterized errata are available on request. Contact your local Intel sales office or your distributor to obtain the latest specifications before placing your product order. Copies of documents which have an ordering number and are referenced in this document, or other Intel literature, may be

obtained from:

Intel Corporation P.O. Box 7641 Mt. Prospect, IL 60056-7641

or call in North America 1-800-879-4683, Europe 44-0-1793-431-155, France 44-0-1793-421-777, Germany 44-0-1793-421-333, other Countries 708-296-9333.

†

Third-party brands and names are the property of their respective owners.

1 Motherboard Description

1.1 Overview......................................................................................................................7

1.2 Form Factor................................................................................................................10

1.3 I/O Shield ...................................................................................................................11

1.4 Microprocessor...........................................................................................................12

1.4.1 Microprocessor Packaging...........................................................................12

1.4.2 Second-Level Cache....................................................................................12

1.4.3 Microprocessor Upgrades............................................................................12

1.5 Memory......................................................................................................................13

1.5.1 Main Memory...............................................................................................13

1.5.2 SDRAM........................................................................................................13

1.5.3 ECC Memory ...............................................................................................14

1.6 Chipset.......................................................................................................................14

1.6.1 Intel 82443LX PCI/A.G.P. Controller............................................................14

1.6.2 Intel 82371AB PCI ISA IDE Xcelerator (PIIX4)............................................15

1.6.3 Accelerated Graphics Port (A.G.P.).............................................................16

1.6.4 Universal Serial Bus (USB)..........................................................................17

1.6.5 IDE Support.................................................................................................17

1.6.6 Real-Time Clock, CMOS SRAM, and Battery ..............................................18

1.7 I/O Interface Controller...............................................................................................18

1.7.1 Serial Ports ..................................................................................................18

1.7.2 Parallel Port .................................................................................................18

1.7.3 Floppy Controller..........................................................................................19

1.7.4 Keyboard and Mouse Interface ....................................................................19

1.7.5 Optional Infrared..........................................................................................19

1.8 Audio Subsystem.......................................................................................................19

1.8.1 OPL3-SA3 Audio System.............................................................................19

1.8.2 Audio Subsystem Resources.......................................................................21

1.8.3 Audio Drivers and Utilities............................................................................21

1.8.4 Audio Connectors ........................................................................................22

1.9 Hardware Monitor.......................................................................................................22

1.10 Tamper Detection.......................................................................................................22

1.11 Onboard Networking ..................................................................................................23

1.11.1 Intel 82557 LAN Controller...........................................................................23

1.11.2 Intel 82555 PHY 10 / 100 Mbit/sec Physical Layer Interface.......................23

1.11.3 Remote Wakeup Controller..........................................................................23

1.11.4 LAN Software...............................................................................................24

1.12 Motherboard Connectors............................................................................................24

1.13 Back Panel Connectors..............................................................................................27

1.14 Onboard Video Configuration Jumper Block..............................................................28

1.15 Configuration Jumper.................................................................................................29

1.15.1 Normal Mode ...............................................................................................29

1.15.2 Configuration Mode......................................................................................30

1.15.3 Recovery Mode............................................................................................30

iii

Contents

1.16 NLX Card Edge Connector.........................................................................................31

1.17 Reliability....................................................................................................................38

1.18 Environmental ............................................................................................................39

1.19 Power Consumption...................................................................................................40

1.20 Regulatory Compliance..............................................................................................41

1.20.1 Safety...........................................................................................................41

1.20.2 EMI ..............................................................................................................41

1.20.3 Product Certification Markings.....................................................................42

2 Motherboard Resources

2.1 Memory Map ..............................................................................................................43

2.2 DMA Channels...........................................................................................................43

2.3 I/O Map ......................................................................................................................44

2.4 PCI Configuration Space Map ....................................................................................46

2.5 Interrupts....................................................................................................................46

2.6 PCI Interrupt Routing Map..........................................................................................47

3 Overview of BIOS Features

3.1 BIOS Upgrades..........................................................................................................49

3.2 BIOS Flash Memory Organization..............................................................................50

3.3 Plug and Play: PCI Autoconfiguration.......................................................................50

3.4 PCI IDE Support.........................................................................................................51

3.5 ISA Plug and Play......................................................................................................51

3.6 ISA Legacy Devices...................................................................................................51

3.7 Desktop Management Interface (DMI) .......................................................................52

3.8 Advanced Power Management (APM).......................................................................52

3.9 Language Support .....................................................................................................53

3.10 Boot Options ..............................................................................................................53

3.11 OEM Logo or Scan Area............................................................................................53

3.12 USB Support ..............................................................................................................53

3.13 BIOS Setup Access....................................................................................................53

3.14 Recovering BIOS Data...............................................................................................54

4 BIOS Setup Program

4.1 Maintenance Menu.....................................................................................................56

4.2 Main Menu .................................................................................................................56

4.2.1 Floppy Options Submenu ............................................................................57

4.2.2 IDE Device Configuration Submenus...........................................................58

4.3 Advanced Menu.........................................................................................................59

4.3.1 Resource Configuration Submenu...............................................................60

4.3.2 Peripheral Configuration Submenu..............................................................61

4.3.3 Keyboard Configuration Submenu...............................................................62

4.3.4 Video Configuration Submenu.....................................................................62

4.3.5 DMI Event Logging Submenu......................................................................62

4.4 Security Menu............................................................................................................63

4.5 Power Menu...............................................................................................................63

4.6 Boot Menu..................................................................................................................64

4.6.1 Hard Drive Submenu ...................................................................................64

4.6.2 Removable Devices Submenu.....................................................................65

4.7 Exit Menu...................................................................................................................65

5 Error Messages and Beep Codes

5.1 BIOS Error Messages ................................................................................................67

5.2 Port 80h POST Codes ...............................................................................................68

5.3 BIOS Beep Codes ......................................................................................................73

6 Specifications and Customer Support

6.1 Online Support...........................................................................................................75

6.2 Specifications.............................................................................................................75

Figures

1. Motherboard Block Diagram.........................................................................................8

2. Motherboard Components............................................................................................9

3. Motherboard Dimensions...........................................................................................10

4. Back Panel I/O Shield Dimensions.............................................................................11

5. Motherboard Connectors............................................................................................24

6. Back Panel I/O Connectors........................................................................................27

7. Onboard Video Configuration Jumper Block..............................................................28

8. Single Configuration Jumper Block ............................................................................29

Contents

Tables

1. Video Resolution........................................................................................................17

2. Audio Subsystem Resources.....................................................................................21

3. CD Audio Connector (J9N1).......................................................................................25

4. Accelerated Graphics Port (J1K1)..............................................................................25

5. Yamaha Wavetable Module Connectors (J9M1) and (J7N1) .....................................26

6. Fan Header (J2B1).....................................................................................................26

7. Onboard Video Configuration Jumper Block Table (J1J1) .........................................28

8. Configuration Jumper (J1A1) .....................................................................................29

9. PCI Segment, Riser Interconnect Pin-out...................................................................31

10. ISA Segment, Riser Interconnect Pin-out...................................................................33

11. IDE, Floppy, and Front Panel Section, Riser Interconnect Pin-out.............................34

12. Signals, NLX Riser with Supplemental Connector......................................................37

13. Motherboard Environmental Specifications................................................................39

14. DC Voltage .................................................................................................................40

15. Power Usage..............................................................................................................40

16. Memory Map ..............................................................................................................43

17. DMA Channels...........................................................................................................43

18. I/O Map ......................................................................................................................44

19. PCI Configuration Space Map....................................................................................46

20. Interrupts....................................................................................................................46

21. PCI Interrupt Routing Map..........................................................................................47

22. Flash Memory Organization .......................................................................................50

23. Recommendations for Configuring an ATAPI Device.................................................51

24. Setup Menu Bar.........................................................................................................55

Contents

25. Setup Function Keys..................................................................................................55

26. Maintenance Menu.....................................................................................................56

27. Main Menu .................................................................................................................56

28. Floppy Options Submenu...........................................................................................57

29. IDE Device Configuration Submenus.........................................................................58

30. Advanced Menu.........................................................................................................59

31. Resource Configuration Submenu.............................................................................60

32. Peripheral Configuration Submenu............................................................................61

33. Keyboard Configuration Submenu.............................................................................62

34. Video Configuration Submenu ...................................................................................62

35. DMI Event Logging Submenu ....................................................................................62

36. Security Menu............................................................................................................63

37. Power Menu...............................................................................................................63

38. Boot Menu..................................................................................................................64

39. Hard Drive Submenu..................................................................................................64

40. Removable Devices Submenu...................................................................................65

41. Exit Menu...................................................................................................................65

42. BIOS Error Messages ................................................................................................67

43. Port 80h Codes..........................................................................................................68

44. Beep Codes ...............................................................................................................73

45. Specifications.............................................................................................................75

1 Motherboard Description

1.1 Overview

The NX440LX motherboard is a versatile platform that offers a wide variety of features. Many of the options, however, are implemented – at least in part – on the riser. Throughout this manual,

‡

symbol is used to indicate such an option. Because there is no standard riser, no detailed

the description of an implementation can be given. See Section 6.1 to obtain the reference design for the NLX riser.



The NX440LX motherboard supports Pentium 266, and 300 MHz. The motherboard features:

•

NLX v1.2 form factor

•

Minimal jumper design

Main Memory

•

Three 168-pin DIMM sockets

•

Support for up to 384 MB of synchronous DRAM (SDRAM)

•

Support for 66 MHz SDRAM

•

Support for ECC and non-ECC memory

II family of microprocessors operating at 233,

Chipset and PCI/IDE Interface

•

Intel 82440LX AGPset PCI/A.G.P. Controller (PAC)

•

Integrated PCI bus mastering controller using PIIX4

•

Dual channel EIDE interface

•

Real-time clock

‡

I/O Features

•

SMC FDC37C677 I/O controller

•

Floppy drive interface

•

Integrates standard I/O functions: one multi-mode parallel port, two FIFO serial ports, and

‡

keyboard and mouse controller

•

Support for one Universal Serial Bus (USB) interface on the motherboard and another on the

‡

riser

•

Support for consumer infrared

‡

Audio Subsystem

•

Yamaha OPL3-SA3 audio codec component

•

Wavetable upgrade header

Graphics Subsystem

•

Optional Cirrus Logic CL-GD5465 A.G.P. graphics accelerator with 2 MB of RAMBUS (RDRAM) video memory expandable to 4 MB using a 2 MB video upgrade module

•

A.G.P. connector

†

NX440LX Motherboard Technical Product Specification

Local Area Network (LAN) Subsystem

• 10/100 Mbit/sec LAN hardware

• Remote wakeup controller

Other features

• Plug and Play compatible

• Support for Advanced Power Management (APM)

• Advanced Configuration and Power Management Interface (ACPI) ready

• PC97 compliant

Processor

Socket

DC/DC

Converter

SDRAM

DIMM(3)

North Bridge

82440LX

A.G.P. Bus

A.G.P.

Connector

CL-GD5465

Graphics

Accelerator

Remote Wakeup

Controller

82557

LAN

Controller

Intel

82555

Phy

Pri. IDE

Sec. IDE

USB Port 1

USB Port 0

Card Edge (for Riser)

Rear I/O Panel

Consumer IR or IrDA

PCI Bus

Rear I/O Panel

Keyboard

Mic In

Line Out

Line In

South Bridge (PIIX4)

Serial Port B Serial Port A Parallel Port

Rear I/O Panel

Floppy

LM78/79

Hardware

Monitor

ISA Bus

SMC

FDC37C677

I/O Controller

Mouse

Rear I/O Panel

Figure 1. Motherboard Block Diagram

OPL3-SA3

Audio

Controller

Flash

OM06480

Motherboard Description

U T

G H

J K

OM06250

Figure 2. Motherboard Components

A Back panel connectors L Piezo speaker

B Yamaha wavetable headers M Slot 1 connector C CD-ROM header N Fan connector D Yamaha OPL3-SA3 (YMF715) O Configuration jumper

E Intel 82555 PHY P DIMM sockets

F Remote wakeup controller Q Intel 82443LX controller G Intel 82557 LAN controller R Optional RAMBUS video memory H Intel 82371AB PIIX4 S Optional RAMBUS memory upgrade socket

I SMC FDC37C677 T Onboard video configuration jumper

J National Semiconductor LM78/79 U A.G.P. connector

K Battery V Optional CL-GD5465 graphics accelerator

NX440LX Motherboard Technical Product Specification

1.2 Form Factor

The motherboard is designed to fit into a standard NLX form factor chassis. Figure 3 illustrates the mechanical form factor for the motherboard. Location of the I/O connectors, riser slot, and mounting holes are in strict compliance with the NLX specification (see Section 6.2). Dimensions are given in inches.

8.70

8.50

0.260

0.0

0.50

0.0

0.349

0.509

1.849

2.108

6.575

9.234

0.260

8.80

12.80

4.207.60

Figure 3. Motherboard Dimensions

13.00

0.20

OM06251

Motherboard Description

1.3 I/O Shield

The back panel I/O shield for the NX440LX motherboard must meet specific dimensional and material requirements. Systems based on this motherboard need the back panel I/O shield in order to pass emission certification testing. Figure 4 shows the critical dimensions for both options of the I/O shield, and indicates the position of each cutout. Dimensions are given in inches.

7.458

3.1461.6530.507

1.080

0.00 9.00

2.479

5.728

8.1826.7504.706

NLX Motherboard Shield

Figure 4. Back Panel I/O Shield Dimensions

OM06255

NX440LX Motherboard Technical Product Specification

1.4 Microprocessor

The motherboard supports a single Pentium II processor. The processor’s VID pins automatically program the motherboard’s voltage regulator to the required processor voltage. The motherboard operates with processors that run internally at 233, 266, or 300 MHz and have either a 256 KB or 512 KB second-level cache.

The processor implements MMX technology and maintains full backward compatibility with the 8086, 80286, Intel386, Intel486, and Pentium processor. The processor’s numeric coprocessor significantly increases the speed of floating-point operations and complies with ANSI/IEEE standard 754-1985.

1.4.1 Microprocessor Packaging

The processor is packaged in a Single Edge Contact (S.E.C.) cartridge. The S.E.C. cartridge includes the processor core, the second-level cache, a thermal plate, and a back cover.

The processor connects to the motherboard through the Slot 1 processor connector, a 242-pin edge connector. When the processor is mounted in Slot 1, it is secured by a retention mechanism attached to the motherboard. The processor’s heatsink is stabilized by a heatsink support that is attached to the motherboard.

1.4.2 Second-Level Cache

The second-level cache is located on the substrate of the S.E.C. cartridge. The cache includes burst pipelined synchronous static RAM (PBSRAM) and tag RAM. There can be two or four BSRAM components totaling 256 KB or 512 KB in size. All supported onboard memory can be cached.

1.4.3 Microprocessor Upgrades

The motherboard can be upgraded with Pentium II processors that run at higher processor speeds. After upgrading the processor, use the BIOS configuration mode to set the proper speed for the processor. See Section 1.15.2 for information about configuration mode.

Motherboard Description

1.5 Memory

1.5.1 Main Memory

The motherboard has three, dual inline memory module (DIMM) sockets. Minimum memory size is 16 MB; maximum memory size is 384 MB. The BIOS automatically detects memory type, size, and speed.

The motherboard supports the following memory features:

• 168-pin DIMMs with gold-plated contacts

• 66 MHz unbuffered SDRAM only

• Non-ECC (64-bit) and ECC (72-bit) memory

• 3.3 V memory only

• Single- or double-sided DIMMs in the following sizes:

DIMM Size Non-ECC Configuration ECC Configuration

16 MB 2 Mbit x 64 2 Mbit x 72 32 MB 4 Mbit x 64 4 Mbit x 72 64 MB 8 Mbit x 64 8 Mbit x 72 128 MB 16 Mbit x 64 16 Mbit x 72

Memory can be installed in one, two, or three sockets. Memory size can vary between sockets.

1.5.2 SDRAM

Synchronous DRAM (SDRAM) improves memory performance through memory access that is synchronous with the memory clock. This simplifies the timing design and increases memory speed because all timing is dependent on the number of memory clock cycles.

NOTE

✏

To function properly, SDRAM DIMMs must meet the Intel 4-clock, 66 MHz, unbuffered SDRAM specification for either 64-bit or 72-bit SDRAM. See Section 6.2 for information about these specifications.

NX440LX Motherboard Technical Product Specification

1.5.3 ECC Memory

Error checking and correcting (ECC) memory detects multiple-bit errors and corrects single-bit errors. When ECC memory is installed, the BIOS supports both ECC and non-ECC mode. ECC mode is enabled in the Setup program. The BIOS automatically detects if ECC memory is installed and provides the Setup option for selecting ECC mode. If non-ECC memory is installed, the Setup option for ECC mode does not appear.

The following table describes the effect of using Setup to put each memory type in each supported mode. Whenever ECC mode is selected in Setup, some performance loss occurs.

Memory Error Detection Mode Established in Setup Program

ECC Disabled ECC Enabled Non-ECC DIMM ECC DIMM

No error detection N/A

No error detection Single-bit error correction, multiple-bit error

detection

1.6 Chipset

The Intel 440LX is designed for the Pentium II processor. It consists of the Intel 82443LX PCI/A.G.P. controller (PAC) and the Intel 82371AB PCI/ISA IDE Xcelerator (PIIX4) bridge chip.

1.6.1 Intel 82443LX PCI/A.G.P. Controller

The PAC provides bus-control signals, address paths, and data paths for transfers between the processor’s host bus, PCI bus, Accelerated Graphics Port (A.G.P.), and main memory. The PAC comes in a 492-pin BGA package and features:

• Processor interface control  Processor host bus speed up to 66 MHz  32-bit addressing  GTL+ compliant host bus

• Integrated DRAM controller  Supports synchronous DRAM (SDRAM)  64/72-bit path-to-memory  Auto detection of memory type  Supports 4-, 16-, 64-Mbit DRAM devices  Symmetrical and asymmetrical DRAM addressing  Supports 3.3 V DRAMs

• Accelerated Graphics Port Interface  Complies with A.G.P. specification (see Section 6.2 for specification information)  Supports 3.3 V A.G.P. devices with data transfer rates up to 133 MHz  Synchronous coupling to the host-bus frequency

Motherboard Description

• Fully-synchronous PCI bus interface  Complies with PCI specification (see Section 6.2 for specification information)  PCI-to-DRAM access greater than 100 MB/sec

‡

 Supports five

PCI bus masters in addition to the host and PCI-to-ISA I/O bridge

 Delayed transactions  PCI parity generation and checking support

• Data Buffering  Host-to-DRAM, PCI-to-DRAM, and A.G.P.-to-DRAM write-data buffering  Write-combining for host-to-PCI burst writes  Supports concurrent host, PCI, and A.G.P. transactions to main memory

• Supports system management mode (SMM)

1.6.2 Intel 82371AB PCI ISA IDE Xcelerator (PIIX4)

The PIIX4 is a multifunction PCI device implementing the PCI-to-ISA bridge, PCI IDE functionality, Universal Serial Bus (USB) host/hub function, and enhanced power management. The PIIX4 comes in a 324-pin MBGA package that features:

• Multifunction PCI-to-ISA bridge  Supports the PCI bus at 33 MHz  Complies with PCI specification (see Section 6.2 for specification information)  Full ISA or extended I/O (EIO) bus support

• USB controller

‡

 Two  Supports legacy keyboard and mouse  Supports UHCI design guide revision 1.1 interface

• Integrated dual-channel enhanced IDE interface  Supports up to four IDE devices  PIO Mode 4 transfers at up to 14 MB/sec  Supports Ultra DMA/33 synchronous DMA mode transfers up to 33 MB/sec  Bus master mode with an 8 x 32-bit buffer for bus master PCI IDE burst transfers

• Enhanced DMA controller  Two 8237-based DMA controllers  Supports PCI DMA with three PC/PCI channels and distributed DMA protocols  Fast type-F DMA for reduced PCI bus usage

• Interrupt controller based on 82C59  Supports 15 interrupts  Programmable for edge/level sensitivity  Supports serial IRQs

• Power management logic  Sleep/resume logic  Supports wake-on-modem through Ring Indicator input  Supports remote wakeup

USB ports (see Section 6.2 for compliance level).

NX440LX Motherboard Technical Product Specification

• Real-Time Clock  256 byte battery-backed CMOS SRAM  Includes date alarm

• 16-bit counters/timers based on 82C54

1.6.3 Accelerated Graphics Port (A.G.P.)

The Accelerated Graphics Port (A.G.P.) is a high-performance interconnect for graphic-intensive applications, such as 3D applications. A.G.P. is independent of the PCI bus and is intended for exclusive use with graphical-display devices. A.G.P. provides these performance features:

• Pipelined-memory read and write operations that hide memory access latency

• Demultiplexing of address and data on the bus for near 100 percent bus efficiency

• AC timing for 133 MHz data transfer rates, allowing data throughput of 500 MB/sec

A.G.P. complies with the 66 MHz PCI specification. See Section 6.2 for information about the A.G.P. and PCI specifications.

NOTE

✏

Due to the location of the third DIMM socket, only half-length AGP cards are supported.

1.6.3.1 CL-GD5465 High-performance Graphics Accelerator

The optional CL-GD5465 supports the A.G.P. for higher bandwidth between the system memory and the graphics subsystem. It is a member of the Laguna family of RAMBUS-based graphics accelerators, offering 3D-graphics capability while maintaining a high level of 2D performance. The features include:

• 64-bit graphics engine with integrated 3D game acceleration

• High-performance 64-bit GUI accelerator

• Video playback acceleration

†

• Integrated VGA

• Integrated 230-MHz palette DAC and clock synthesizer

controller

Motherboard Description

Table 1. Video Resolution

Resolution Supported No. of Colors

640 x 480, 800 x 600, 1024 x 768, 1280 x 1024, 1600 x 1200 256 (8 bit) 640 x 480, 800 x 600, 1024 x 768, 1280 x 1024 65,536 (16 bit) 640 x 480, 800 x 600, 1024 x 768 16,777,216 (24 bit) 640 x 480, 800 x 600, 1024 x 768, 1280 x 1024, 1600 x 1200 256 (8 bit) 640 x 480, 800 x 600, 1024 x 768, 1280 x 1024 65,536 (16 bit) 640 x 480, 800 x 600, 1024 x 768 16,777,216 (24 bit) 640 x 480, 800 x 600, 1024 x 768 16,777,216(32 bit) 640 x 480, 800 x 600, 1024 x 768, 1280 x 1024, 1600 x 1200 256 (8 bit) 640 x 480, 800 x 600, 1024 x 768, 1280 x 1024 65,536 (16 bit) 640 x 480, 800 x 600, 1024 x 768 16,777,216 (24 bit) 640 x 480, 800 x 600, 1024 x 768, 1280 x 1024 256 (8 bit) 640 x 480, 800 x 600, 1024 x 768 65,536 (16 bit)

1.6.4 Universal Serial Bus (USB)

The motherboard can support two‡ USB ports; however, it is shipped with only one connector. The second is supported through the NLX riser. If you need to connect more than one USB device, you can connect an external hub to the USB port. The motherboard fully supports the universal host controller interface (UHCI) and uses UHCI-compatible software drivers. See Section 6.2 for information about the USB specification. USB features include:

• Self-identifying peripherals that can be plugged in while the computer is running

• Automatic mapping of function to driver and configuration

• Supports isochronous and asynchronous transfer types over the same set of wires

• Supports up to 127 physical devices per USB port

• Bandwidth and low latencies appropriate for telephony, audio, and other applications

• Error-handling and fault-recovery mechanisms built into the protocol

NOTE

✏

Computer systems that have an unshielded cable attached to a USB port may not meet FCC Class B or other regulatory EMI requirements, even if no device or a low-speed (sub-channel) USB device is attached to the cable. Use shielded cable that meets the requirements for high-speed (fully-rated) devices.

1.6.5 IDE Support

The motherboard has two independent bus-mastering capable PCI IDE interfaces. These interfaces support PIO Mode 3, PIO Mode 4, ATAPI devices (e.g., CD-ROM), and Ultra DMA/33 synchronous-DMA mode transfers. The BIOS supports logical block addressing (LBA) and extended cylinder head sector (ECHS) translation modes. The BIOS automatically detects the IDE device transfer rate.

NX440LX Motherboard Technical Product Specification

Programmed I/O operations usually require a substantial amount of processor bandwidth. However, in multitasking operating systems, the bandwidth freed by bus mastering IDE can be devoted to other tasks while disk transfers are occurring.

1.6.6 Real-Time Clock, CMOS SRAM, and Battery

The real-time clock is compatible with DS1287 and MC146818 components. The clock provides a time-of-day clock and a multicentury calendar with alarm features and century rollover. The realtime clock supports 256 bytes of battery-backed CMOS SRAM in two banks that are reserved for BIOS use.

The time, date, and CMOS values can be specified in the Setup program. The CMOS values can be returned to their defaults by using the Setup program.

An external coin-cell battery powers the real-time clock and CMOS memory. When the computer is not plugged into a wall socket, the battery has an estimated life of three years. When the computer is plugged in, the 5 V standby current from the power supply extends the life of the battery. The clock is accurate to ± 13 minutes/year at 25 ºC with 5 V applied.

1.7 I/O Interface Controller

• Enhanced Ultra I/O SMC FDC37C677  5 Volt operation  ISA Plug-and-Play compatible register set

• Two serial ports or one serial port and one infrared port

• One floppy controller

• FIFO support on both serial and floppy interfaces

• One parallel port with ECP and EPP support

†

• PS/2

• Supports BIOS setup for various configuration options

style mouse and keyboard interfaces

1.7.1 Serial Ports

The motherboard has two 9-pin D-Sub serial port connectors located on the back panel. The NS16C550-compatible UARTs allow data transfers at speeds up to 115.2 Kbits/sec using BIOS support.

1.7.2 Parallel Port

The connector for the multimode bi-directional parallel port is a 25-pin D-Sub connector located on the back panel of the motherboard. In the Setup program, there are four options for parallel port operation:

• Compatible (standard mode)

• Bi-directional (PS/2 compatible)

• Bi-directional Enhanced Parallel Port (EPP). A driver from the peripheral manufacturer is

required for operation. See Section 6.2 for EPP compatibility

• Bi-directional high-speed Extended Capabilities Port (ECP)

‡

Motherboard Description

1.7.3 Floppy Controller

The I/O controller is software compatible with the 82077 floppy drive controller. The floppy connector is located on the riser card. In the Setup program, the floppy interface can be configured for the following floppy drive capacities and sizes:

• 1.2 MB, 5.25-inch

• 1.2 MB, 3.5-inch (Mode 3 floppy support, driver required)

• 1.44 MB, 3.5-inch

• 2.88 MB, 3.5-inch

• 120 MB (LS-120)

1.7.4 Keyboard and Mouse Interface

PS/2 keyboard and mouse connectors are located on the back panel of the motherboard. The +5 V lines to these connectors are protected with a PolySwitch reestablishes the connection after an over-current condition is removed. While this device eliminates the possibility of having to replace a fuse, power to the computer should be turned off before connecting or disconnecting a keyboard or mouse.

NOTE

✏

You can plug the mouse and keyboard into either connector.

The keyboard controller contains code which provides the traditional keyboard and mouse control functions, and also supports Power On/Reset password protection. A Power On/Reset password can be specified in the Setup program.

The keyboard controller supports the following hot-key sequence:

• <Ctrl><Alt><Del> Software reset. This key sequence resets the computer’s software by jumping to the beginning of the BIOS code and running the Power-On Self Test (POST).

†

circuit that, like a self-healing fuse,

1.7.5 Optional Infrared

There is no infrared header on the motherboard; however, the edge connector does accommodate infrared signals from the riser. If either IrDA Configuration Submenu to change the mode for Serial Port B from COM2 to infrared applications.

†

or ASK-IR† is available, use the BIOS Peripheral

1.8 Audio Subsystem

1.8.1 OPL3-SA3 Audio System

The optional onboard audio subsystem features the Yamaha OPL3-SA3 (YMF715) device. The features of the device include:

• A 16-bit audio codec

• OPL3 FM synthesis

• An integrated 3D enhanced stereo controller including all required analog components

• Stereo analog-to-digital and digital-to-analog converters

NX440LX Motherboard Technical Product Specification

• Analog mixing, anti-aliasing, and reconstruction filters

• Supports 16-bit address decoding

• Line In, line out, and microphone connectors

• ADPCM, A-law, or µlaw digital audio compression and decompression

• Full digital control of all mixer and volume control functions

• Plug and Play compatible

†

• Sound Blaster Pro

NOTE

✏

Using the front panel line in, line out, and microphone connectors (if available on the riser) disables the back panel connectors.

and Microsoft Windows Sound System compatible

Motherboard Description

1.8.2 Audio Subsystem Resources

The following table shows the IRQ, DMA channel, and base I/O address options for the audio subsystem. Options are listed in order of preference specified by Yamaha. These options are automatically chosen by the Plug and Play interface, so there are no default settings. Onboard audio can be enabled or disabled in the Setup program.

Table 2. Audio Subsystem Resources

IRQ

Resource

Sound Blaster (DMA playback, DMA shared with Windows Sound System capture)

Windows Sound System (DMA playback)

MPU-401 (IRQ shared with Sound Blaster)

MIDI / Game Port 201h

†

AdLib

†

(Options)

10 7 5,7, 10,11

5 11 5,7, 10,11

DMA Channel (Options)

1 0,1,3

0 0,1,3

I/O Address (Options)

220-22Fh 240-24Fh 16 bytes on 16-byte

boundary in the range of 220-280h

530-537h E80-E87h 8 bytes on 8-byte

boundary in the range of 530-F48h

330-331h 300-301h 2 bytes on 2-byte

boundary in the range of 300-334h

1 byte on 1-byte boundary in the range of 201-20Fh

388-38Dh 6 bytes on 8-byte

boundary in the range of 388-3F8h

1.8.3 Audio Drivers and Utilities

Audio software and utilities are available from Intel’s World Wide Web site (see Section 6.1). Audio driver support is provided for the Microsoft Windows

†

Microsoft Windows NT

(versions 3.51 and 4.0), and IBM OS/2† Warp† (versions 3.0 and 4.0)

operating systems.

†

3.1, Microsoft Windows 95,

NX440LX Motherboard Technical Product Specification

1.8.4 Audio Connectors

The audio connectors include the following connectors:

• Back panel connectors: Line In, Mic In, Line Out

• CD-ROM audio

• Hardware wavetable

1.8.4.1 CD-ROM Audio Connector

An optional 1 x 4-pin Creative Labs-type connector (J9N1) is available for connecting an internal CD-ROM drive to the audio mixer. The connector is designed for audio add-in cards and is compatible with most cables supplied with Creative Labs CD-ROM drives. Audio signals from the riser are supported on the edge connector.

1.8.4.2 Hardware Wavetable Headers

Two 2 x 3-pin headers (J9M1, J7N1) are available for a wavetable add-in module. An optional OPL4-ML reference design module that can be plugged into the motherboard may be licensed from Yamaha Corporation. Compatible wavetable module cards are available from several vendors.

1.9 Hardware Monitor

The optional management extension hardware provides low-cost instrumentation capabilities on a National Semiconductor LM78/79 chip. The features include:

• Integrated temperature sensor

• Fan speed sensors

• Power supply voltage monitoring to detect levels above or below acceptable values



• Remote reset capabilities from a remote peer or server through LANDesk

Version 3.0 and service layers

See Section 6.2 for information about the management extension hardware specification. For more information, please check the following web site: http://www.national.com/pf/LM/

Client Manager,

1.10 Tamper Detection

If the riser is equipped with a tamper detection switch, the motherboard will emit a continuous beep anytime the cover is opened and the A/C power cord is still connected. This warning is intended to remind the user that 5 V standby power is still applied within the system. To avoid this warning, unplug the power cord before opening the cover. The act of removing the cover will still be recorded by circuitry on the motherboard, to be subsequently reported to any management suite software in use.

CAUTION

Disconnecting the power cord can leave the system without an adequate electrical ground. Use proper procedures to prevent electrostatic discharge (ESD) which could damage your system.

Motherboard Description

1.11 Onboard Networking

The onboard networking subsystem is an Ethernet† LAN interface that provides both 10Base-T and 100Base-TX connectivity. Onboard LAN can be enabled or disabled in the Setup program. Features include:

• 32-bit direct bus mastering on the PCI bus

• Shared memory structure in the host memory that copies data directly to/from host memory

• 10Base-T and 100Base-TX capability using a single RJ-45 connector

• IEEE 802.3µ Auto-Negotiation for the fastest available connection

• Jumperless configuration; the LAN subsystem is completely software configurable

• Remote wake up controller

1.11.1 Intel 82557 LAN Controller

This device is the heart of the LAN subsystem. It provides the following functions:

• CSMA/CD protocol engine

• PCI compatibility

• DMA engine for movement of commands, status, and network data across the PCI bus

• Standard MII interface for access to IEEE 802.3µ -compliant physical layer devices

1.11.2 Intel 82555 PHY 10 / 100 Mbit/sec Physical Layer Interface

The physical layer interface provides the following:

• Integrated 10/100 Mbit/sec single chip solution

• Complete 10/100 Mbit/sec media independent interface compliance with MDI support

• Full duplex operation available in both 10 and 100 Mbit/sec modes

• 25 MHz clock for 10 and 100 Mbit/sec modes

• Single magnetics module for 10 and 100 Mbit/sec operation

• IEEE 802.3µ Auto-Negotiation support for 10Base-T, 10Base-T FDX, 100Base-TX FDX,

100Base-TX FDX-FC

• Parallel detection algorithm for legacy support of non-Auto-Negotiation enabled link partner

• Glueless interface to TX solution with single magnetics module

• LED function mapping support via MDI interface

• Support for a LAN activity LED on an NLX riser

‡

1.11.3 Remote Wakeup Controller

The Remote Wakeup ASIC performs the Wake on LAN† function of the motherboard via the onboard LAN interface. When the system is powered off, the Remote Wakeup ASIC and the 82555 PHY remain powered by a 5 V standby voltage. The ASIC monitors network traffic at the MII interface and when it detects a Magic Packet system.

†

it asserts a wakeup signal that powers up the

If an external network interface card (NIC) with remote wakeup capabilities is added to the system

‡

the NIC’s remote wakeup header must be connected to the header on an NLX riser.

NX440LX Motherboard Technical Product Specification

1.11.4 LAN Software

The software for the LAN subsystem, including setup/diagnostic software and a readme file viewer that lists supported drivers, is available on the web site. See Section 6.1.

1.12 Motherboard Connectors

The following figure shows the connectors on the motherboard.

Onboard

Video

Configuration

Jumper

J1J1

A. G. P.

J1K1

DIMM Sockets(3)

J1D1, J2D1

J2D2

J7N1

1 5

Yamaha Wavetable

J9M1

J9N1

4 6

Creative

Labs

CD-ROM

Supplemental Gold Finger Edge Connector

A-channel RAMBUS Memory Interface

Riser Gold Finger Edge Connector

Configuration

Jumper

J1A1

Fan

1 3

J2B1

Slot 1

Connector

J4D1

Figure 5. Motherboard Connectors

OM06256

Motherboard Description

Table 3. CD Audio Connector (J9N1)

Pin Signal Name

1 Ground 2 CD_IN-Left 3 Ground 4 CD_IN-Right

Table 4. Accelerated Graphics Port (J1K1)

Pin Signal Name Pin Signal Name Pin Signal Name Pin Signal Name

A1 +12 V B1 No Connect A34 Vcc3.3 B34 Vcc3.3 A2 No Connect B2 Vcc A35 AGP_AD22 B35 AGP_AD21 A3 Reserved B3 Vcc A36 AGP_AD20 B36 AGP_AD19 A4 No Connect B4 No Connect A37 Ground B37 Ground A5 Ground B5 Ground A38 AGP_AD18 B38 AGP_AD17 A6 PIRQ0# B6 PIRQ1# A39 AGP_AD16 B39 AGP_CBE2 A7 RST# B7 HCLK_AGP A40 Vcc3.3 B40 Vcc3.3 A8 AGP_GNT1# B8 AGP_REQ1 A41 AGP_FRAME# B41 AGP_IRDY# A9 Vcc3.3 B9 Vcc3.3 A42 Reserved B42 Reserved A10 AGP_ST1 B10 AGP_ST0 A43 Ground B43 Ground A11 Reserved B11 AGP_ST2 A44 Reserved B44 Reserved A12 AGP_PIPE# B12 AGP_DBF# A45 Vcc3.3 B45 Vcc3.3 A13 Ground B13 Ground A46 AGP_TRDY# B46 AGP_DEVSEL# A14 No Connect B14 No Connect A47 AGP_STOP# B47 Vcc3.3 A15 SBA1 B15 SBA0 A48 PCI_PM* B48 AGP_PERR# A16 Vcc3.3 B16 Vcc3.3 A49 Ground B49 Ground A17 SBA3 B17 SBA2 A50 AGP_PAR B50 AGP_SERR# A18 Reserved B18 SB_STB A51 AGP_AD15 B51 AGP_CBE1 A19 Ground B19 Ground A52 Vcc3.3 B52 Vcc3.3 A20 SBA5 B20 SBA4 A53 AGP_AD13 B53 AGP_AD14 A21 SBA7 B21 SBA6 A54 AGP_AD11 B54 AGP_AD12 A22 Key B22 Key A55 Ground B55 Ground A23 Key B23 Key A56 AGP_AD9 B56 AGP_AD10 A24 Key B24 Key A57 AGP_CBE0 B57 AGP_AD8 A25 Key B25 Key A58 Vcc3.3 B58 Vcc3.3 A26 AGP_AD30 B26 AGP_AD31 A59 Reserved B59 AD_STBA A27 AGP_AD28 B27 AGP_AD29 A60 AGP_AD6 B60 AGP_AD7 A28 Vcc3.3 B28 Vcc3.3 A61 Ground B61 Ground A29 AGP_AD26 B29 AGP_AD27 A62 AGP_AD4 B62 AGP_AD5 A30 AGP_AD24 B30 AGP_AD25 A63 AGP_AD2 B63 AGP_AD3 A31 Ground B31 Ground A64 Vcc3.3 B64 Vcc3.3 A32 Reserved B32 AD_STBB A65 AGP_AD0 B65 AGP_AD1 A33 AGP_CBE3 B33 AGP_AD23 A66 SMDATA B66 SMBCLK

NX440LX Motherboard Technical Product Specification

Table 5. Yamaha Wavetable Module

Connectors (J9M1) and (J7N1)

Connector (J9M1)

Pin Signal Name

1 EXTEN# 2 SIN 3 Vcc 4 Ground 5 BCK 6 LACK

Connector (J7N1)

Pin Signal Name

1 RSTSLOT 2 Vcc 3 AUD33MHZ

4 MIDI Out 5 Ground 6 Key

Note: There are two 2x3 headers that connect to the

Yamaha wavetable daughter card

Table 6. Fan Header (J2B1)

Pin Signal Name

1 GND 2 Fan Power 3 Tachometer

1.13 Back Panel Connectors

Motherboard Description

LineInLine

Mic

Out

Parallel Port

Mouse/

Keyboard

Serial Port 1Serial Port 2

(optional)

USBLAN

Figure 6. Back Panel I/O Connectors

Video

OM06254

NX440LX Motherboard Technical Product Specification

1.14 Onboard Video Configuration Jumper Block

The following figure illustrates the onboard video configuration jumper at J1J1.

Onboard

Video

Configuration

J1J1

3 1

OM06521

Figure 7. Onboard Video Configuration Jumper Block

Table 7. Onboard Video Configuration Jumper Block (J1J1)

Function Jumper Configuration

Enable 1-2 Enables onboard video. Disable 2-3 Disables onboard video and allows use of an add-in A.G.P. card or any video

on the riser.

NOTE

✏

Due to the location of the third DIMM socket, only half-length A.G.P. cards are supported.

Motherboard Description

1.15 Configuration Jumper

The following figure shows the location of the configuration jumper block on the motherboard.

Configuration

Jumper

3 1

J1A1

OM06252

Figure 8. Single Configuration Jumper Block

Table 8. Configuration Jumper Table (J1A1)

Function Jumper Configuration

Normal 1-2 The BIOS uses current configuration information and passwords for booting. Configure 2-3 After the POST runs, Setup is run automatically, using BIOS defaults. The

maintenance menu is displayed.

Recovery none The BIOS attempts to recover the BIOS configuration. A recovery diskette is

required.

CAUTION

Moving the jumper with the power on can damage your computer. Always turn off the power and unplug the power cord from the computer before changing the jumper.

1.15.1 Normal Mode

This mode is for normal computer booting and operations. To enable this mode, pins 1 and 2 must be connected on the configuration jumper (J1A1). The BIOS uses the current bus/processor frequency ratio, configuration information, and passwords to boot the computer. Access to the Setup program can be restricted using a supervisor or user password.

NX440LX Motherboard Technical Product Specification

1.15.2 Configuration Mode

This mode is for configuring special BIOS settings, including processor speed and special maintenance options. This mode is used when upgrading the BIOS, upgrading the processor, or clearing the passwords. To enable this mode, pins 2 and 3 must be connected on the configuration jumper (J1A1). In this mode, Setup automatically executes after the POST runs. No password is required, and this mode overrides any passwords that are set. The Maintenance menu is the first menu displayed. This menu provides options for setting the processor speed and clearing passwords. All other Setup screens are available. Configure mode uses the default BIOS settings for booting, not the current user or supervisor settings. The default settings include using the lowest bus/processor frequency ratio the processor supports. User and supervisor settings are preserved and used when the computer is rebooted.

For the configuration changes to take effect after exiting the Setup program, power down the computer, set the configuration jumper to normal mode (see Section 1.15.1), and boot the computer.

1.15.3 Recovery Mode

This mode is for recovering BIOS data. To enable this mode, no pins are connected on the configuration jumper (J1A1). After the computer is powered-on, the BIOS attempts to upgrade or recover the BIOS data from a floppy diskette in the floppy drive. If a diskette is not in the boot drive, the BIOS runs the POST, does not boot the operating system, and displays a message that the jumper is not properly installed. If the recovery fails with a diskette in the boot drive, a beep code indicates that the recovery failed.

For the configuration changes to take effect after a successful recovery, power down the computer, set the configuration jumper to normal mode (see Section 1.15.1), and boot the computer.

Motherboard Description

1.16 NLX Card Edge Connector

The NLX riser connector on the motherboard consists of a 340 (2x170) position and a supplemental 26 (2x13) position gold finger contact. All edge connector pin definitions are defined in the NLX specification, version 1.2.

According to the NLX specification, the motherboard edge connector provides the following:

• PCI signals (the motherboard supports up to four PCI devices)

• ISA signals

• 2 IDE channels

• 1 floppy drive

• Infrared signals

• Miscellaneous front panel signals

• Power connection for the motherboard

See Section 6.2 for information about the NLX Specification. Table 9, Table 10, and Table 11 specify the pinouts located on the primary connector; Table 12

specifies the pinouts located on the supplemental connector. All edge connector pin definitions are defined in the NLX specification, version 1.2.

Table 9. PCI Segment, Riser Interconnect Pin-out

Pin# Signal Name Type I/O Termination Pin Signal Name Type I/O Termination

A1 -12V PWR NA NA B1 PCSPKR_RT AUDIO O NA A2 REQ4# PCI I RIS B2 +12V PWR NA NA A3 +12V PWR NA NA B3 PCSPKR_LFT AUDIO O NA A4 GNT4# PCI O RIS B4 +12V PWR NA NA A5 3.3VDC PWR NA NA B5 PCICLK0 PCI O MB A6 PCIINT3# PCI I RIS B6 GND PWR NA NA A7 3.3VDC PWR NA NA B7 PCICLK1 PCI O MB A8 PCIINT0# PCI I RIS B8 SER_IRQ MISC I/O MB A9 PCIINT1# PCI I RIS B9 PCIINT2# PCI I RIS A10 PCICLK2 PCI O MB B10 3.3VDC PWR NA NA A11 3.3VDC PWR NA NA B11 PCICLK3 PCI O MB A12 PCI_RST# PCI O MB B12 GND PWR NA NA A13 GNT0# PCI O RIS B13 GNT3# PCI O RIS A14 PCICLK4 PCI O MB B14 3.3VDC PWR NA NA A15 GND PWR NA NA B15 GNT2# PCI O RIS A16 GNT1# PCI O RIS B16 AD[31] PCI I/O RIS

continued

☛

NX440LX Motherboard Technical Product Specification

Table 9. PCI Segment, Riser Interconnect Pin-out

(continued)

Pin# Signal Name Type I/O Termination Pin Signal Name Type I/O Termination

A17 3.3VDC PWR NA NA B17 REQ0# PCI I RIS A18 REQ2# PCI I RIS B18 GND PWR NA NA A19 REQ3# PCI I RIS B19 AD[29] PCI I/O RIS A20 AD[30] PCI I/O RIS B20 AD[28] PCI I/O RIS A21 GND PWR NA NA B21 AD[26] PCI I/O RIS A22 AD[25] PCI I/O RIS B22 3.3VDC PWR NA NA A23 REQ1# PCI I RIS B23 AD[24] PCI I/O RIS A24 AD[27] PCI I/O RIS B24 C/BE[3]# PCI I/O RIS A25 3.3VDC PWR NA NA B25 AD[22] PCI I/O RIS A26 AD[23] PCI I/O RIS B26 GND PWR NA NA A27 AD[20] PCI I/O RIS B27 AD[21] PCI I/O RIS A28 AD[18] PCI I/O RIS B28 AD[19] PCI I/O RIS A29 GND PWR NA NA B29 AD[16] PCI I/O RIS A30 AD[17] PCI I/O RIS B30 3.3VDC PWR NA NA A31 IRDY# PCI I/O RIS B31 C/BE[2]# PCI I/O RIS A32 DEVSEL# PCI I/O RIS B32 FRAME# PCI I/O RIS A33 3.3VDC PWR NA NA B33 TRDY# PCI I/O RIS A34 STOP# PCI I/O RIS B34 GND PWR NA NA A35 PERR# PCI I/O RIS B35 SDONE PCI I/O RIS A36 SERR# PCI I/O RIS B36 LOCK# PCI I/O RIS A37 GND PWR NA NA B37 SBO# PCI I/O RIS A38 C/BE[1]# PCI I/O RIS B38 3.3VDC PWR NA NA A39 AD[13] PCI` I/O RIS B39 AD[15] PCI I/O RIS A40 AD[10] PCI I/O RIS B40 PAR PCI I/O RIS A41 GND PWR NA NA B41 AD[14] PCI I/O RIS A42 C/BE[0]# PCI I/O RIS B42 GND PWR NA NA A43 AD[00] PCI I/O RIS B43 AD[11] PCI I/O RIS A44 AD[06] PCI I/O RIS B44 AD[12] PCI I/O RIS A45 3.3VDC PWR NA NA B45 AD[09] PCI I/O RIS A46 AD[05] PCI I/O RIS B46 3.3VDC PWR NA NA A47 AD[01] PCI I/O RIS B47 AD[08] PCI I/O RIS A48 AD[03] PCI I/O RIS B48 AD[07] PCI I/O RIS A49 GND PWR NA NA B49 AD[04] PCI I/O RIS A50 AD[02] PCI I/O RIS B50 GND PWR NA NA A51 5VDC PWR NA NA B51 PCI_PM# PCI I/O MB

I/O Column Definitions Relative to Motherboard

O = Output from motherboard to riser I = Input from riser to motherboard

Termination Column Definitions:

MB = Termination/Pullup/Pulldown/debounce is on Motherboard RIS = Termination/Pullup/Pulldown is on Riser card

N/A = Not on Motherboard or Riser

Motherboard Description

Table 10. ISA Segment, Riser Interconnect Pin-out

Pin Signal Name Type I/O Termination Pin Signal Name Type I/O Termination

A52 RSTDRV ISA O MB B52 5VDC PWR NA NA A53 IOCHK# ISA I MB B53 IRQ9 ISA O MB A54 SD[6] ISA I/O MB B54 DRQ2 ISA I MB A55 SD[7] ISA I/O MB B55 SD[3] ISA I/O MB A56 SD[4] ISA I/O MB B56 0WS# ISA I MB A57 5VDC PWR NA NA B57 SD[1] ISA I/O MB A58 SD[2] ISA I/O MB B58 AEN ISA O MB A59 SD[5] ISA I/O MB B59 IOCHRDY ISA I MB A60 SD[0] ISA I/O MB B60 SA[18] ISA I/O MB A61 SMEMW# ISA O MB B61 SMEMR# ISA O MB A62 SA[19] ISA I/O MB B62 SA[16] ISA I/O MB A63 IOW# ISA I/O MB B63 IOR# ISA I/O MB A64 SA[17] ISA I/O MB B64 DRQ3 ISA I MB A65 GND PWR NA NA B65 SA[15] ISA I/O MB A66 DACK#3 ISA O MB B66 GND PWR NA NA A67 SA[14] ISA I/O MB B67 SA[13] ISA I/O MB A68 DACK1# ISA O MB B68 5VDC PWR NA NA A69 DRQ1 ISA I MB B69 REFRESH# ISA I/O MB A70 SA[12] ISA I/O MB B70 SA[11] ISA I/O MB A71 SYSCLK ISA O MB B71 SA[10] ISA I/O MB A72 SA[9] ISA I/O MB B72 IRQ7 ISA I MB A73 5VDC PWR NA NA B73 IRQ6 ISA I MB A74 IRQ5 ISA I MB B74 SA[8] ISA I/O MB A75 SA[7] ISA I/O MB B75 SA[6] ISA I/O MB A76 IRQ3 ISA I MB B76 DACK2# ISA O MB A77 IRQ4 ISA I MB B77 SA[4] ISA I/O MB A78 SA[5] ISA I/O MB B78 GND PWR NA NA A79 TC ISA O MB B79 SA[3] ISA I/O MB A80 BALE ISA O MB B80 SA[2] ISA I/O MB A81 GND PWR NA NA B81 SA[1] ISA I/O MB A82 OSC ISA O MB B82 SA[0] ISA I/O MB A83 IOCS16# ISA I MB B83 SBHE# ISA I/O MB

continued ☛

NX440LX Motherboard Technical Product Specification

Table 10. ISA Segment, Riser Interconnect Pin-out

(continued)

Pin Signal Name Type I/O Termination Pin Signal Name Type I/O Termination

A84 MEMCS16# ISA I MB B84 LA[23] ISA I/O MB A85 IRQ11 ISA I MB B85 LA[22] ISA I/O MB A86 IRQ10 ISA I MB B86 LA[21] ISA I/O MB A87 IRQ15 ISA I MB B87 LA[20] ISA I/O MB A88 IRQ12 ISA I MB B88 LA[19] ISA I/O MB A89 GND PWR NA NA B89 LA[18] ISA I/O MB A90 IRQ14 ISA I MB B90 LA[17] ISA I/O MB A91 DRQ0 ISA I MB B91 DACK0# ISA O MB A92 MEMR# ISA I/O MB B92 DACK5# ISA O MB A93 MEMW# ISA I/O MB B93 SD[8] ISA I/O MB A94 SD[9] ISA I/O MB B94 DACK6# ISA O MB A95 DRQ5 ISA I MB B95 SD[10] ISA I/O MB A96 DRQ6 ISA I MB B96 5VDC PWR NA NA A97 5VDC PWR NA NA B97 SD[11] ISA I/O MB A98 SD[12] ISA I/O MB B98 DRQ7 ISA I MB A99 DACK7# ISA O MB B99 SD[13] ISA I/O MB A100 SD[14] ISA I/O MB B100 SD[15] ISA I/O MB A101 MASTER# ISA I MB B101 GND PWR NA NA

I/O Column Definitions Relative to Motherboard

O = Output from motherboard to riser I = Input from riser to motherboard

Termination Column Definitions:

MB = Termination/Pullup/Pulldown/debounce is on Motherboard RIS = Termination/Pullup/Pulldown is on Riser card

N/A = Not on Motherboard or Riser

Table 11. IDE, Floppy, and Front Panel Section, Riser Interconnect Pin-out

Pin Signal Name Type I/O Termination Pin Signal Name Type I/O Termination

A102 IDEA_DD8 IDE I/O MB B102 GND PWR NA NA A103 IDEA_RESET# IDE O MB B103 IDEA_DD7 IDE I/O MB A104 IDEA_DD9 IDE I/O MB B104 IDEA_DD6 IDE I/O MB A105 5VDC PWR NA NA B105 IDEA_DD5 IDE I/O MB A106 IDEA_DD4 IDE I/O MB B106 IDEA_DD11 IDE I/O MB A107 IDEA_DD10 IDE I/O MB B107 IDEA_DD12 IDE I/O MB A108 IDEA_DD3 IDE I/O MB B108 GND PWR NA NA A109 IDEA_DD13 IDE I/O MB B109 IDEA_DD14 IDE I/O MB A110 IDEA_DD1 IDE I/O MB B110 IDEA_DD2 IDE I/O MB A111 GND PWR NA NA B111 IDEA_DD0 IDE I/O MB A112 IDEA_DIOW# IDE O MB B112 IDEA_DD15 IDE I/O MB

continued

☛

Motherboard Description

Table 11. IDE, Floppy, and Front Panel Section, Riser Interconnect Pin-out

(continued)

Pin Signal Name Type I/O Termination Pin Signal Name Type I/O Termination

A113 IDEA_DMARQ IDE I MB B113 IDEA_DIOR# IDE O MB A114 IDEA_IORDY IDE I MB B114 IDEA_CSEL IDE O MB A115 IDEA_DMACK# IDE O MB B115 IDEA_INTRQ IDE I MB A116 RESERVED RES NA NA B116 5VDC PWR NA NA A117 IDEA_DA2 IDE O MB B117 IDEA_DA1 IDE O MB A118 IDEA_CS0# IDE O MB B118 IDEA_DA0 IDE O MB A119 5VDC PWR NA NA B119 IDEA_CS1# IDE O MB A120 IDEA_DASP# IDE I RIS B120 IDEB_DD8 IDE I/O MB A121 IDEB_RESET# IDE O MB B121 IDEB_DD7 IDE I/O MB A122 IDEB_DD9 IDE I/O MB B122 GND PWR NA NA A123 IDEB_DD6 IDE I/O MB B123 IDEB_DD10 IDE I/O MB A124 IDEB_DD5 IDE I/O MB B124 5VDC PWR NA NA A125 IDEB_DD11 IDE I/O MB B125 IDEB_DD4 IDE I/O MB A126 IDEB_DD12 IDE I/O MB B126 IDEB_DD3 IDE I/O MB A127 GND PWR NA NA B127 IDEB_DD13 IDE I/O MB A128 IDEB_DD2 IDE I/O MB B128 IDEB_DD14 IDE I/O MB A129 IDEB_DD15 IDE I/O MB B129 IDEB_DD1 IDE I/O MB A130 IDEB_DIOW# IDE I/O MB B130 IDEB_DD0 IDE I/O MB A131 IDEB_DMARQ IDE I MB B131 IDEB_DIOR# IDE O MB A132 IDEB_IORDY IDE I MB B132 IDEB_CSEL IDE O MB A133 GND PWR NA NA B133 IDEB_INTRQ IDE I MB A134 IDEB_DMACK# IDE O MB B134 IDEB_DA1 IDE O MB A135 RESERVED RES NA NA B135 IDEB_DA2 IDE O MB A136 IDEB_DA0 IDE O MB B136 IDEB_CS1# IDE O MB A137 IDEB_CS0# IDE O MB B137 IDEB_DASP# IDE I RIS A138 DRV2# FLOPPY GND NA B138 GND PWR NA NA A139 5VDC PWR NA NA B139 DRATE0 FLOPPY O NA A140 RESERVED RES NA NA B140 FDS1# FLOPPY O NA A141 DENSEL FLOPPY O NA B141 FDS0# FLOPPY O NA A142 FDME0# FLOPPY O NA B142 DIR# FLOPPY O NA A143 INDX# FLOPPY I RIS B143 MSEN1 FLOPPY I NA

continued

☛

NX440LX Motherboard Technical Product Specification

Table 11. IDE, Floppy, and Front Panel Section, Riser Interconnect Pin-out

(continued)

Pin Signal Name Type I/O Termination Pin Signal Name Type I/O Termination

A144 FDME1# FLOPPY O NA B144 GND PWR NA NA A145 GND PWR NA NA B145 WRDATA# FLOPPY O NA A146 WE# FLOPPY O NA B146 TRK0# FLOPPY I RIS A147 STEP# FLOPPY O NA B147 MSEN0 FLOPPY I NA A148 WP# FLOPPY I RIS B148 RDDATA# FLOPPY I RIS A149 HDSEL# FLOPPY O NA B149 DSKCHG# FLOPPY I RIS A150 SDA MISC I/O MB B150 GND PWR NA NA A151 SCL MISC O MB B151 IRSL0 MISC I/O NA A152 FAN_TACH1 MISC I NA B152 IRSL1 MISC I/O NA A153 FAN_TACH2 MISC I NA B153 IRSL2 MISC I/O NA A154 FAN_TACH3 MISC I NA B154 IRTX MISC I/O NA A155 FAN_CTL MISC I NA B155 IRRX MISC I/O NA A156 5VDC PWR NA NA B156 FP_SLEEP MISC I MB A157 USB1/3_N MISC I/O RIS B157 FP_RST# MISC I MB A158 USB1/3_P MISC I/O RIS B158 GND PWR NA NA A159 USB1/3_OC# MISC I RIS B159 PWRLED# MISC O RIS A160 USB2/4_N MISC I/O RIS B160 PWOK PWR I NA A161 USB2/4_P MISC I/O RIS B161 A162 USB2/4_OC# MISC I RIS B162 PS_ON# PWR O NA A163 GND PWR NA NA B163 LAN_WAKE MISC I MB A164 VBAT MISC O RIS B164 LAN_ACTVY_

A165 TAMP_DET# MISC I MB B165 MDM_WAKE# MISC I MB A166 MSG_WAIT_

LED# A167 1394_GND PWR O NA B167 RESERVED RES NA NA A168 RESERVED RES NA NA B168 RESERVED RES NA NA A169 5VSB PWR I NA B169 RESERVED RES NA NA A170 3.3VSENSE PWR O NA B170 -5V PWR NA NA

I/O Column Definitions Relative to Motherboard

O = Output from motherboard to riser I = Input from riser to motherboard

Termination Column Definitions:

MB = Termination/Pullup/Pulldown/debounce is on Motherboard RIS = Termination/Pullup/Pulldown is on Riser card

N/A = Not on Motherboard or Riser

MISC O RIS B166 1394_PWR PWR I NA

SOFT_ON/OFF#

LED#

PWR I MB

MISC O NA

Motherboard Description

Table 12. Signals, NLX Riser with Supplemental Connector

Pin Signal Name Type I/O * Description Signal Type

X1 CD_IN_LT AUDIO I CD-ROM line in left. Analog

1 V RMS

X2 AGND PWR NA Low pass filtered ground for audio circuitry on

the riser.

X3 MIC_IN AUDIO I Pre-amplified microphone input. Pre-amp

circuitry to reside on riser or in microphone.

X4 LINE_OUT_LT AUDIO O Analog line out left. Analog

X5 FP_SPKR_EN ** AUDIO I This signal indicates if headphones have

been plugged into the front panel LINE OUT jack. The signal is connected to one of the wipers on the audio jack and is HIGH when the headphones are plugged into the front audio jack and LOW when they are not. The signal is pulled high through a pull-up on the motherboard (Typically 100K).

X6 VOL_DN# ** AUDIO I Connects to Volume Down switch on front

panel, appropriate pull-up resistor on motherboard. The motherboard provides

debounce protection and a pull-up resistor. X7 GND PWR NA Ground NA X8 SMI# ** SYS I System Management Interrupt that is an

input to the motherboard. X9 RESERVED RES NA Reserved NA X10 RESERVED RES NA Reserved NA X11 RESERVED RES NA Reserved NA X12 AGND PWR NA Low pass filtered ground for audio circuitry on

the riser. X13 MODEM_MIC AUDIO O Pre-amplified microphone mono output signal

from motherboard to telephony device.

CD_IN_RT AUDIO I CD-ROM line in right. Analog

CD_IN_GND PWR I Isolated CD-ROM Ground. NA

AVCC PWR O Clean power from the motherboard to audio

circuitry on the NLX riser; could be an

isolated power source; 1.5 Ampere max.

limitation because of the connector / gold

finger limitation.

LINE_OUT_RT AUDIO O Analog line out right. Analog

Analog 1 V RMS

1 V RMS TTL

TTL

open drain

Analog 1 V RMS

1 V RMS

5-9 V DC

1 V RMS

continued ☛

NX440LX Motherboard Technical Product Specification

Table 12. Signals, NLX Riser with Supplemental Connector

Pin Signal Name Type I/O * Description Signal Type

Y5 FP_MIC_EN ** AUDIO I This signal indicates if a microphone has

been plugged into the front panel MIC_IN jack. The signal is connected to a wiper on the MIC_IN jack and is LOW when the microphone is plugged in and HIGH when it is not. The signal is pulled LOW through a pull down on the motherboard (Typically 100K).

Y6 VOL_UP# ** AUDIO I Connects to Volume Up switch on front

panel, appropriate pull-up resistor on motherboard. The motherboard provides

debounce protection and a pull-up resistor. Y7 AC_RST# ** AC’97 O AC’97 master H/W reset. TTL Y8 AC_SD_IN ** AC’97 I Serial, time division, multiplexed, AC’97 input

stream to the motherboard from the codec

on the riser (output from the codec). Y9 GROUND PWR NA Digital (main motherboard) ground plane. NA Y10 AC_SD_OUT ** AC’97 O Serial, time division, multiplexed, AC’97

output from the motherboard to the codec on

the riser (input to the codec). Y11 AC_SYNC ** AC’97 O 48KHz fixed rate sample sync signal from

the motherboard to the codec on the riser. Y12 AC_BIT_CLK ** AC’97 I 12.288 MHz serial data clock. TTL Y13 MODEM_SPKR AUDIO O Analog mono output signal from telephony

device to motherboard.

* I/O column: relative to motherboard, “O” = output, from motherboard to riser; “I” = input, from riser to motherboard. ** These signals are not supported.

(continued)

TTL

Analog 1V RMS

1.17 Reliability

The Mean Time Between Failures (MTBF) data is calculated from predicted data at 55 ºC. Motherboard MTBF: 186,417 hours

1.18 Environmental

Table 13. Motherboard Environmental Specifications

Parameter Specification

Temperature

Non-Operating Operating

Shock

Unpackaged 50 G trapezoidal waveform

Packaged Half sine 2 millisecond

Vibration

Unpackaged 5 Hz to 20 Hz : 0.01g² Hz sloping up to 0.02 g² Hz

Packaged 10 Hz to 40 Hz : 0.015g² Hz (flat)

-40 °C to +70 °C 0 °C to +55 °C

Velocity change of 170 inches/second

Product Weight Free Fall (inches) Velocity Change (inches/sec) <20 lbs. 36 167 21-40 lbs. 30 152 41-80 lbs. 24 136 81-100 lbs. 18 118

20 Hz to 500 Hz : 0.02g² Hz (flat)

40 Hz to 500 Hz : 0.015g² Hz sloping down to 0.00015 g² Hz

Motherboard Description

NX440LX Motherboard Technical Product Specification

1.19 Power Consumption

Tables 14 and 15 list voltage and current specifications for a computer that contains the motherboard, a 266 MHz Pentium II processor, 16 MB RAM, 512 KB cache, 3.5-inch floppy drive, 2.1 GB IDE hard drive, and a 8X IDE CD-ROM drive. This information is provided only as a guide for calculating approximate power usage with additional resources added.

Values for the Windows 95 desktop mode are measured at 640 x 480 x 256 colors and 60 Hz refresh rate. AC watts are measured with a typical 145 W supply, nominal input voltage and frequency, with true RMS wattmeter at the line input.

Table 14. DC Voltage

DC Voltage Acceptable Tolerance

+3.3 V ± 4% +5 V ± 5% +5 V SB (standby) ± 5%

-5 V ± 5% +12 V ± 5%

-12 V ± 5%

Table 15. Power Usage

DC (amps) at:

Mode AC (watts) +3.3 V +5 V -5 V +12 V -12 V

DOS prompt, APM disabled 63 1.2 A 4.5 A 0.1 A 0.7 A 0.2 A Windows 95 desktop, APM disabled 64 1.0 A 5.3 A 0.1 A 0.6 A 0.2 A Windows 95 desktop, APM enabled, in

System Management Mode (SMM)

30 1.0 A 1.0 A 0.1 A 0.2 A 0.2 A

For typical configurations, the motherboard is designed to operate with at least a 200 W NLX power supply (see Section 6.2 for the specification). Use a higher wattage supply for heavily loaded configurations. The power supply must comply with the NLX power supply recommendations.

Motherboard Description

1.20 Regulatory Compliance

This printed circuit assembly complies with the following safety and EMI regulations when correctly installed in a compatible host system.

1.20.1 Safety

1.20.1.1 UL 1950 - CSA 950-95, 3rd edition, Dated 07-28-95

The Standard for Safety of Information Technology Equipment including Electrical Business Equipment. (USA & Canada)

1.20.1.2 CSA C22.2 No. 950-93, 3rd Edition

The Standard for Safety of Information Technology Equipment including Electrical Business Equipment. (Canada)

1.20.1.3 EN 60 950, 2nd Edition, 1992 (with Amendments 1, 2 & 3)

The Standard for Safety of Information Technology Equipment including Electrical Business Equipment. (European Union)

1.20.1.4 IEC 950, 2nd edition, 1991 (with Amendments 1, 2 & 3)

The Standard for Safety of Information Technology Equipment including Electrical Business Equipment. (International)

1.20.1.5 EMKO-TSE (74-SEC) 207/94

Summary of Nordic deviations to EN 60 950. (Norway, Sweden, Denmark & Finland)

1.20.2 EMI

1.20.2.1 FCC Class B

Title 47 of the Code of Federal Regulations, Parts 2 & 15, Subpart B, pertaining to unintentional radiators. (USA)

1.20.2.2 CISPR 22, 2nd Edition, 1993

Limits and methods of measurement of Radio Interference Characteristics of Information Technology Equipment. (International)

1.20.2.3 EN 55 022, 1995

Limits and methods of measurement of Radio Interference Characteristics of Information Technology Equipment. (Europe)

NX440LX Motherboard Technical Product Specification

1.20.2.4 EN 50 082-1 (1992)

Generic Immunity Standard; Currently compliance is determined via testing to IEC 801-2, -3, and -4. (Europe)

1.20.2.5 VCCI Class 2 (ITE)

Implementation Regulations for Voluntary Control of Radio Interference by Data Processing Equipment and Electronic Office Machines. (Japan)

1.20.2.6 ICES-003, Issue 2

Interference-Causing Equipment Standard, Digital Apparatus. (Canada)

1.20.3 Product Certification Markings

This printed circuit assembly has the following product certification markings:

• European CE Marking: Consists of a marking on the board and shipping container.

• UL Recognition Mark: Consists of the UL File No. E139761 on the component side of the

board and the PB No. on the solder side of the board. Board material flammability is 94V-1 or -0.

• Canadian Compliance: Consists of small c followed by a stylized backward UR on component

side of board.

2 Motherboard Resources

NOTE

✏

For more detailed information about the resources used for onboard audio, see the Audio Subsystem section in Chapter 1.

2.1 Memory Map

Table 16. Memory Map

Address Range (decimal) Address Range (hex) Size Description

1024 K - 393216 K 100000 - 18000000 383 MB Extended memory 1008 K - 1024 K FC000 - FFFFF 16 KB Boot block 1000 K - 1008 K FA000 - FBFFF 8 KB ESCD (Plug and Play configuration and

DMI) 996 K - 1000 K F9000 - F9FFF 4 KB Reserved for BIOS 992 K - 996 K F8000 - F8FFF 4 KB OEM Logo or Scan User Flash 928 K - 992 K E8000 - F7FFF 64 KB POST BIOS 896 K - 928 K E0000 - E7FFF 32 KB POST BIOS (Available as UMB) 800 K - 896 K C8000 - DFFFF 96 KB Available high DOS memory (open to ISA

and PCI bus) 640 K - 800 K A0000 - C7FFF 160 KB Video memory and BIOS 639 K - 640 K 9FC00 - 9FFFF 1 KB Extended BIOS data (movable by memory

manager software) 512 K - 639 K 80000 - 9FBFF 127 KB Extended conventional memory 0 K - 512 K 00000 - 7FFFF 512 KB Conventional memory

2.2 DMA Channels

Table 17. DMA Channels

DMA Channel Number Data Width System Resource

0 8- or 16-bits Audio 1 8- or 16-bits Audio / Parallel Port 2 8- or 16-bits Floppy Drive 3 8- or 16-bits Parallel Port (for ECP or EPP) / Audio 4 Reserved - Cascade Channel 5 16-bits Open 6 16-bits Open 7 16-bits Open

NX440LX Motherboard Technical Product Specification

2.3 I/O Map

Table 18. I/O Map

Address (hex) Size Description

0000 - 000F 16 bytes PIIX4- DMA 1 0020 - 0021 2 bytes PIIX4 - interrupt controller 1 002E - 002F 2 bytes I/O controller configuration registers 0040 - 0043 4 bytes PIIX4 - Counter/Timer 1 0048 - 004B 4 bytes PIIX4- Counter/Timer 2 0060 1 byte Keyboard Controller Byte - Reset IRQ 0061 1 byte PIIX4 - NMI, Speaker Control 0064 1 byte Keyboard controller, CMD/STAT Byte 0070, bit 7 1 bit PIIX4 - enable NMI 0070, bits 6:0 7 bits PIIX4 - real time clock, address 0071 1 byte PIIX4 - real time clock, data 0078 1 byte Reserved - motherboard configuration 0079 1 byte Reserved - motherboard configuration 0080 - 008F 16 bytes PIIX4 - DMA page registers 00A0 - 00A1 2 bytes PIIX4 - interrupt controller 2 00B2 - 00B3 2 bytes APM control 00C0 - 00DE 31 bytes PIIX4 - DMA 2 00F0 1 byte Reset numeric error 0170 - 0177 8 bytes Secondary IDE channel 01F0 - 01F7 8 bytes Primary IDE channel 0200 - 0207 8 bytes Audio / game port 0220 - 022F 16 bytes Audio (Sound Blaster compatible) 0240 - 024F 16 bytes Audio (Sound Blaster compatible) 0278 - 027F 8 bytes LPT2 0290 - 0297 8 bytes Management extension hardware 02E8 - 02EF 8 bytes COM4/Video (8514A) 02F8 - 02FF 8 bytes COM2 0300 - 0301 2 bytes MPU-401 (MIDI) 0330 - 0331 2 bytes MPU-401 (MIDI) 0332 - 0333 2 bytes MPU-401 (MIDI) 0334 - 0335 2 bytes MPU-401 (MIDI) 0376 1 byte Secondary IDE channel command port 0377 1 byte Floppy channel 2 command 0377, bit 7 1 bit Floppy disk change, channel 2

continued ☛

Motherboard Resources

Table 18. I/O Map

Address (hex) Size Description

0377, bits 6:0 7 bits Secondary IDE channel status port 0378 - 037F 8 bytes LPT1 0388- 038D 6 bytes AdLib (FM synthesizer) 03B4 - 03B5 2 bytes Video (VGA) 03BA 1 byte Video (VGA) 03BC - 03BF 4 bytes LPT3 03C0 - 03CA 11 bytes Video (VGA) 03CC 1 byte Video (VGA) 03CE - 03CF 2 bytes Video (VGA) 03D4 - 03D5 2 bytes Video (VGA) 03DA 1 byte Video (VGA) 03E8 - 03EF 8 bytes COM3 03F0 - 03F5 6 bytes Floppy Channel 1 03F6 1 byte Primary IDE channel command port 03F7 (Write) 1 byte Floppy channel 1 command 03F7, bit 7 1 bit Floppy disk change channel 1 03F7, bits 6:0 7 bits Primary IDE channel status port 03F8 - 03FF 8 bytes COM1 04D0 - 04D1 2 bytes Edge/level triggered PIC 0530 - 0537 8 bytes Windows Sound System 0604 - 060B 8 bytes Windows Sound System LPTn + 400h 8 bytes ECP port, LPTn base address + 400h 0CF8 - 0CFB* 4 bytes PCI configuration address register 0CF9** 1 byte Turbo and reset control register 0CFC - 0CFF 4 bytes PCI configuration data register 0E80 - 0E87 8 bytes Windows Sound System 0F40- 0F47 8 bytes Windows Sound System 0F86 - 0F87 2 bytes Yamaha OPL3-SA3 configuration FF00 - FF07 8 bytes IDE bus master register FFA0 - FFA7 8 bytes Primary bus master IDE registers FFA8 - FFAF 8 bytes Secondary bus master IDE registers

(continued)

* DWORD access only ** Byte access only

NOTE

✏

See the Audio section(s) in Chapter 1 for specific I/O addresses that can be used by the audio components on your motherboard. This table does not list I/O addresses that may be used by add-in cards in the system.

NX440LX Motherboard Technical Product Specification

2.4 PCI Configuration Space Map

Table 19. PCI Configuration Space Map

Bus Number (hex)

00 00 00 Intel 82440LX (PAC) 00 01 00 Intel 82371AB (PIIX4 ) A.G.P. bus 00 07 00 Intel 82371AB (PIIX4 ) PCI/ISA bridge 00 07 01 Intel 82371AB (PIIX4 ) IDE bus master 00 07 02 Intel 82371AB (PIIX4 ) USB 00 07 03 Intel 82371AB (PIIX4 ) power management 00 14 00 PCI expansion slot 1 00 12 00 PCI expansion slot 2 00 06 00 Intel 82557 PCI Ethernet Controller (LAN) 01 00 00 Cirrus Logic CL-GD5465 A.G.P. Controller (Video)

2.5 Interrupts

Table 20. Interrupts

IRQ System Resource

NMI I/O Channel Check 0 Reserved, Interval Timer 1 Reserved, Keyboard Buffer Full 2 Reserved, Cascade Interrupt From Slave PIC 3 COM2* 4 COM1* 5 LPT2 (Plug and Play option) / Audio / User available 6 Floppy Drive 7 LPT1* 8 Real Time Clock 9 User available 10 User available 11 Windows Sound System* / User available 12 Onboard Mouse Port (if present, else user available) 13 Reserved, Math Coprocessor 14 Primary IDE (if present, else user available) 15 Secondary IDE (if present, else user available)

Device Number (hex)

Function Number (hex) Description

‡ ‡

* Default, but can be changed to another IRQ

2.6 PCI Interrupt Routing Map

Motherboard Resources

This section describes interrupt sharing and how the interrupt signals are connected between the

‡

PCI expansion slots

and onboard PCI devices. The PCI specification specifies how interrupts can be shared between devices attached to the PCI bus. In most cases, the small amount of latency added by interrupt sharing does not affect the operation or throughput of the devices. In some special cases where maximum performance is needed from a device, a PCI device should not share an interrupt with other PCI devices. Use the following information to avoid sharing an interrupt with a PCI add-in card.

PCI devices are categorized as follows to specify their interrupt grouping:

• INTA: By default, all add-in cards that require only one interrupt are in this category. For

almost all cards that require more than one interrupt, the first interrupt on the card is also classified as INTA.

• INTB: Generally, the second interrupt on add-in cards that require two or more interrupts is

classified as INTB. (This is not an absolute requirement.)

• INTC and INTD: Generally, a third interrupt on add-in cards is classified as INTC and a

fourth interrupt is classified as INTD.

The PIIX4 PCI-to-ISA bridge has four programmable interrupt request (PIRQ) input signals. Any PCI interrupt source (either onboard or from a PCI add-in card) connects to one of these PIRQ signals. Because there are only four signals, some PCI interrupt sources are mechanically tied together on the motherboard and therefore share the same interrupt. Table 21 lists the PIRQ

‡

signals and shows how the signals are connected to the PCI expansion slots

and to onboard PCI

interrupt sources.

Table 21. PCI Interrupt Routing Map

PIIX4 PIRQ Signal

PIRQA INTA INTD INTC PIRQB INTB INTA INTD INTA PIRQC INTC INTB INTA INTB INTA PIRQD INTD INTC INTB INTA

First PCI Expansion Slot

Second PCI

‡

Expansion Slot

Third PCI

‡

Expansion Slot

Onboard

‡

Video USB

Ethernet LAN Controller

For example, assume an add-in card has one interrupt (group INTD) into the second PCI slot. In this slot, an interrupt source from group INTA connects to the PIRQD signal, which is already connected to the onboard video and USB PCI sources. The add-in card shares an interrupt with these onboard interrupt sources.

Now, however, plug an add-in card that has one interrupt (group INTA) into the first PCI slot. Plug a second add-in card that has two interrupts (groups INTA and INTB) into the second PCI slot. INTA in the first slot is connected to signal PIRQA. INTA in the second slot is connected to signal PIRQB, and INTB is connected to signal PIRQC. With no other cards added, the three interrupt sources on the first two cards each have a PIRQ signal to themselves. Typically, they will not share an interrupt.

NX440LX Motherboard Technical Product Specification

NOTE

✏

The PIIX4 can connect each PIRQ line internally to one of the IRQ signals (3, 4, 5, 7, 9, 11, 14,

15). Typically, a device that does not share a PIRQ line will have a unique interrupt. However, in certain interrupt-constrained situations, it is possible for two or more of the PIRQ lines to be connected to the same IRQ signal.

3 Overview of BIOS Features

The motherboard uses an Intel/Phoenix BIOS, which is stored in flash memory and can be upgraded using a disk-based program. In addition to the BIOS, the flash memory contains the Setup program, Power-On Self Test (POST), Advanced Power Management (APM) software, the PCI auto-configuration utility, and Windows 95-ready Plug and Play. See Section 6.2 for the supported versions of these specifications.

This motherboard supports system BIOS shadowing, allowing the BIOS to execute from 64-bit onboard write-protected DRAM.

The BIOS displays a message during POST identifying the type of BIOS and a the revision code. The initial production BIOS is identified as 4N4XL0X0.86A.

3.1 BIOS Upgrades

A new version of the BIOS can be upgraded from a diskette using the iFLASH.EXE utility that is available from Intel. This utility does BIOS upgrades as follows:

• Updates the flash BIOS from a file on a disk

• Updates the language section of the BIOS

• Makes sure that the upgrade BIOS matches the target system to prevent accidentally installing

a BIOS for a different type of system.

BIOS upgrades and the iFLASH.EXE utility are available from Intel through the Intel World Wide Web site. See Section 6.1 for information about this site.

NOTE

✏

Please review the instructions distributed with the upgrade utility before attempting a BIOS upgrade.

NX440LX Motherboard Technical Product Specification

3.2 BIOS Flash Memory Organization

The 2-Mbit flash component is organized as 256 KB x 8 bits and is divided into areas as described in Table 22. The table shows the addresses in the ROM image in normal mode (the addresses change in BIOS Recovery Mode).

Table 22. Flash Memory Organization

Address (Hex) Size Description

FFFFC000 - FFFFFFFF 16 KB Boot Block FFFFA000 - FFFFBFFF 8 KB Vital Product Data (VPD) Extended System Configuration Data

(ESCD) (DMI configuration data / Plug and Play data) FFFF9000 - FFFF9FFF 4 KB Used by BIOS (e.g., for Event Logging) FFFF8000 - FFFF8FFF 4 KB OEM logo or Scan Flash Area FFFC0000 - FFFF7FFF 224 KB Main BIOS Block

3.3 Plug and Play: PCI Autoconfiguration

The BIOS automatically configures PCI devices and Plug and Play devices. PCI devices may be onboard or add-in cards. Plug and Play devices are ISA add-in cards built to meet the Plug and Play specification. Autoconfiguration lets a user insert or remove PCI or Plug and Play cards without having to configure the system. When a user turns on the system after adding a PCI or Plug and Play card, the BIOS automatically configures interrupts, the I/O space, and other system resources. Any interrupts set to Available in Setup are considered to be available for use by the add-in card.

PCI interrupts are distributed to available ISA interrupts that have not been assigned to an ISA card or to system resources. The assignment of PCI interrupts to ISA IRQs is non-deterministic. PCI devices can share an interrupt, but an ISA device cannot share an interrupt allocated to PCI or to another ISA device. Autoconfiguration information is stored in the extended system configuration data (ESCD) format.

For information about the versions of PCI and Plug and Play supported by this BIOS, see Section 6.2. Copies of the specifications can be obtained from the Intel World Wide Web site (see Section 6.1).

Overview of BIOS Features

3.4 PCI IDE Support

If Auto is selected as a primary or secondary IDE device (see Section 4.2.2) in Setup, the BIOS automatically sets up the two local-bus IDE connectors with independent I/O channel support. The IDE interface supports hard drives up to PIO Mode 4 and recognizes any ATAPI devices, including CD-ROM drives and tape drives (see Section 6.2 for the supported version of ATAPI). The BIOS determines the capabilities of each drive and configures them so as to optimize capacity and performance. To take advantage of the high-capacity storage devices, hard drives are automatically configured for logical block addressing (LBA) and to PIO Mode 3 or 4, depending on the capability of the drive. To override the autoconfiguration options, use the specific IDE device options in Setup. The ATAPI specification recommends that ATAPI devices be configured as shown in Table 23.

Table 23. Recommendations for Configuring an ATAPI Device

Primary Cable Secondary Cable

Configuration

Normal, no ATAPI ATA Disk and CD-ROM for enhanced IDE systems ATA ATAPI Legacy IDE system with only one cable ATA ATAPI Enhanced IDE with CD-ROM and a tape or two CD-ROMs ATA ATAPI ATAPI

Drive 0 Drive 1 Drive 0 Drive 1

3.5 ISA Plug and Play

If Plug and Play operating system (see Section 4.3) is selected in Setup, the BIOS autoconfigures only ISA Plug and Play cards that are required for booting (IPL devices). If Plug and Play operating system is not selected in Setup, the BIOS autoconfigures all Plug and Play ISA cards.

3.6 ISA Legacy Devices

Since ISA legacy devices are not autoconfigurable, the resources for them must be reserved. Resources can be reserved in the Setup program.

NX440LX Motherboard Technical Product Specification

3.7 Desktop Management Interface (DMI)

Desktop Management Interface (DMI) is an interface for managing computers in an enterprise environment. The main component of DMI is the management information format (MIF) database, which contains information about the computing system and its components. Using DMI, a system administrator can obtain the system types, capabilities, operational status, and installation dates for system components. The MIF database defines the data and provides the method for accessing this information. The BIOS enables applications such as Intel LANDesk Client Manager to use DMI. The BIOS stores and reports the following DMI information:

• BIOS data, such as the BIOS revision level

• Fixed-system data, such as peripherals, serial numbers, and asset tags

• Resource data, such as memory size, cache size, and processor speed

• Dynamic data, such as event detection and error logging

OEMs can use a utility that programs flash memory so the BIOS can report on system and chassis information. This utility is available through Intel sales offices. See Section 6.1 for information about contacting a local Intel sales office. See Section 6.2 for information about the latest DMI specification.

DMI does not work directly under non-Plug and Play operating systems (e.g., Windows NT). However, the BIOS supports a DMI table interface for such operating systems. Using this support, a DMI service-level application running on a non-Plug and Play OS can access the DMI BIOS information.

3.8 Advanced Power Management (APM)

The BIOS supports APM and standby mode. See Section 6.2 for the version of the APM specification that is supported. The energy saving standby mode can be initiated in the following ways:

• Time-out period specified in Setup

• Suspend/resume switch connected to the front panel sleep connector

• From the operating system, such as the Suspend menu item in Windows 95

In standby mode, the motherboard reduces power consumption by using SMM capabilities, spinning down hard drives, and reducing power to or turning off VESA monitors. Power-management mode can be enabled or disabled in Setup (see Section 4.5).

While in standby mode, the system retains the ability to respond to external interrupts and service requests, such as incoming faxes or network messages. Any keyboard or mouse activity brings the system out of standby mode and immediately restores power to the monitor.

The BIOS enables APM by default; but the operating system must support an APM driver for the power-management features to work. For example, Windows 95 supports the power-management features upon detecting that APM is enabled in the BIOS.

†

DPMS-compliant

Overview of BIOS Features

3.9 Language Support

Five languages will be available: American English, German, Italian, French, and Spanish. The BIOS includes extensions to support the Kanji character set and other non-ASCII character sets. Translations of other languages may become available at a later date.

The default language is American English, which is always present unless another language is programmed into the BIOS using the flash memory update utility. See Section 3.1 for information about the BIOS update utility.

3.10 Boot Options

In the Setup program, the user can choose to boot from a floppy drive, hard drive, CD-ROM, or the network. The default setting is for the floppy drive to be the primary boot device and the hard drive to be the secondary boot device. By default the third and fourth devices are disabled.

Booting from CD-ROM is supported in compliance to the El Torito bootable CD-ROM format specification. See Section 6.2 for information about the El Torito specification. Under the Boot menu in the Setup program, CD-ROM is listed as a boot device. Boot devices are defined in priority order. If the CD-ROM is selected as the boot device, it must be the first device.

The network can be selected as a boot device. This selection allows booting from a network add-in card with a remote boot ROM installed.

3.11 OEM Logo or Scan Area

A 4 KB flash-memory user area at memory location FFFF8000h-FFFF8FFFh is for displaying a custom OEM logo during POST. A utility is available from the Intel web site (see Section 6.1) to assist with installing a logo into the flash memory. Contact Intel customer support for further information. See Section 6.1 for information on contacting Intel customer support.

3.12 USB Support

The USB connectors allow any of several USB devices to be attached to the computer. Typically, the device driver for USB devices is managed by the operating system. However, because keyboard and mouse support may be needed in the Setup program before the operating system boots, the BIOS supports USB keyboards and mice.

3.13 BIOS Setup Access

Access to the Setup program can be restricted using passwords. User and supervisor passwords can be set using the Security menu in Setup. The default is no passwords enabled. See Section 4.4 for information about setting user and supervisor passwords.

NX440LX Motherboard Technical Product Specification

3.14 Recovering BIOS Data

Some types of failure can destroy the BIOS. For example, the data can be lost if a power outage occurs while the BIOS is being updated in flash memory. The BIOS can be recovered from a diskette using the BIOS recovery mode (see Section 1.15.3).

To create a BIOS recovery diskette, a bootable diskette must be created and the recovery files copied to it. The recovery files are available from Intel, contact Intel customer support for further information. See Section 6.1 for information on contacting Intel customer support.

4 BIOS Setup Program

The Setup program is for viewing and changing the BIOS settings for a computer. Setup is accessed by pressing the <F2> key after the Power-On Self Test (POST) memory test begins and before the operating system boot begins. Table 24 shows the menus available from the menu bar at the top of the Setup screen.

Table 24. Setup Menu Bar

Setup Menu Screen Description

Maintenance Sets the processor speed and clears the Setup passwords. Main Allocates resources for hardware components. Advanced Sets advance features available through the chipset. Security Sets passwords and security features. Power Sets power management features. Boot Sets boot options and power supply controls. Exit Saves or discards changes.

Table 25 shows the function keys available for menu screens.

Table 25. Setup Function Keys

Setup Key Description

<F1> or <Alt-H> Brings up a help screen for the current item. <Esc> Exits the menu. <←> or <→> <↑> or <↓> <Home> or <End> Moves cursor to top or bottom of the window. <PgUp> or <PgDn> Moves cursor to top or bottom of the window. <F5> or <-> Selects the previous value for a field. <F6> or <+> or <Space> Selects the next value for a field. <F9> Load the default configuration values for the current menu. <F10> Save the current values and exit Setup. <Enter> Executes command or selects the submenu.

< + > and < - > Moves a device up and down the boot order list.

Selects a different menu screen. Moves cursor up or down.

NX440LX Motherboard Technical Product Specification

4.1 Maintenance Menu

This menu is for setting the processor speed and clearing the Setup passwords. Setup only displays this menu in configure mode. See Section 1.15.2 for information about setting configure mode.

Table 26. Maintenance Menu

Feature Options Description

Processor Speed

Clear All Passwords None Clears the user and supervisor passwords.

• 233

• 266

• 300

Specifies the processor speed in megahertz.

4.2 Main Menu

This menu reports processor and memory information, and is for configuring the language, system date, system time, floppy options, and IDE devices.

Table 27. Main Menu

Feature Options Description

Processor Type None Displays processor type. Processor Speed None Displays processor speed. Cache RAM None Displays size of L2 cache. Total Memory None Displays the total amount of RAM on the motherboard. BIOS Version None Displays the version of the BIOS. Language

System Time Hour, minute,

System Date Month, day, and

Floppy Options, submenu

Primary IDE Master, submenu

Primary IDE Slave, submenu

Secondary IDE Master, submenu

Secondary IDE Slave, submenu

• English (US)

(default)

• Italiana

• Français

• Deutsche

• Español

and second

year None Configures the diskette drives. When selected, displays the

None Reports type of a connected IDE device. When selected, displays

Selects the current default language used by the BIOS.

Specifies the current time.

Specifies the current date.

Floppy Options submenu. See Section 4.2.1.

the Primary IDE Master submenu. See Section 4.2.2.

the Primary IDE Slave submenu. See Section 4.2.2.

the Secondary IDE Master submenu. See Section 4.2.2.

the Secondary IDE Slave submenu. See Section 4.2.2.

4.2.1 Floppy Options Submenu

This submenu is for configuring floppy drives.

Table 28. Floppy Options Submenu

Feature Options Description

Diskette A:

Diskette B:

Floppy Write Protect

• Disabled

• 360 KB, 5.25 inch

• 1.2 MB, 5.25 inch

• 720 KB, 3.5 inch

• 1.44/1.25 MB, 3.5 inch

(default)

• 2.88 MB, 3.5 inch

• Disabled (default)

• 360 KB, 5.25 inch

• 1.2 MB, 5.25 inch

• 720 KB, 3.5 inch

• 1.44/1.25 MB, 3.5 inch

• 2.88 MB, 3.5 inch

• Disabled (default)

• Enabled

BIOS Setup Program

Specifies the capacity and physical size of the diskette drive A.

Specifies the capacity and physical size of the diskette drive B.

Disables or enables write protect for the diskette drive(s).

NX440LX Motherboard Technical Product Specification

4.2.2 IDE Device Configuration Submenus

This submenu is for configuring the IDE device features for the following:

• Primary IDE master

• Primary IDE slave

• Secondary IDE master

• Secondary IDE slave

Table 29. IDE Device Configuration Submenus

Feature Options Description

Type

Cylinders 1 to Heads 1 to 16 Specifies number of disk heads. Sectors 1 to 64 Specifies number of disk sectors. Maximum Capacity None Reports maximum capacity for the hard disk.

Multi-Sector Transfers

LBA Mode Control

None

•

ATAPI Removable

•

CD-ROM

•

IDE Removable

•

User

•

Auto (default)

•

XXXX

Disabled

•

2 Sectors

•

4 Sectors

•

8 Sectors

•

16 Sectors (default)

•

Disabled

•

Enabled (default)

•

Specifies the IDE configuration mode for IDE devices.

User allows the cylinders, heads, and sectors fields to be changed.

Auto automatically fills in the values for the cylinders, heads, and sectors fields.

Specifies number of disk cylinders.

Value calculated from number of cylinders, heads, and sectors.

Specifies number of sectors per block for transfers from the hard drive to memory.

Check the hard drive’s specifications for optimum setting of this feature.

Enables or disables logical block addressing (LBA) in place of the Cylinders, Heads, and Sectors fields.

32 Bit I/O

Transfer Mode

Ultra DMA

Disabled (default)

•

Enabled

•

Standard

•

Fast PIO 1

•

Fast PIO 2

•

Fast PIO 3

•

Fast PIO 4 (default)

•

Disabled (default)

•

Mode 0

•

Mode 1

•

Mode 2

•

CAUTION

Changing the LBA Mode Control after a hard drive was formatted can corrupt data on the hard drive.

Enables or disables 32 bit IDE data transfers between the processor and the IDE device.

Specifies method for transferring data between the hard drive and system memory.

Specifies the ultra DMA mode for the hard drive.

4.3 Advanced Menu

This menu is for setting advance features that are available through the computer’s chipset.

Table 30. Advanced Menu

Feature Options Description

Plug & Play O/S

Reset Configuration Data

Memory Cache

Resource Configuration, submenu

Peripheral Configuration, submenu

Keyboard Features, submenu

Video Configuration, submenu

DMI Event Logging, submenu

• No

• Yes (default)

• No (default)

• Yes

• Disabled

• Enabled (default)

None Configures memory blocks and IRQs for legacy ISA

None Configures peripheral ports and devices. When

None Configures keyboard features. When selected,

None Configures video features. When selected,

None Configures DMI Events Logging. When selected,

Specifies if a Plug and Play operating system is being used.

No lets BIOS configure all devices. Yes lets the operating system configure Plug and

Play devices. Not required with a Plug and Play operating system.

Clears the BIOS configuration data on the next boot.

Enables or disables the memory cache.

devices. When selected, displays the Resource Configuration submenu. See Section 4.3.1.

selected, displays the Peripheral Configuration submenu. See Section 4.3.2.

displays the Keyboard Features submenu. See Section 4.3.3.

displays the Video Configuration submenu. See Section 4.3.4.

displays the DMI Events Logging submenu. See Section 4.3.5.

BIOS Setup Program

NX440LX Motherboard Technical Product Specification

4.3.1 Resource Configuration Submenu

This submenu is for configuring the memory and interrupts.

Table 31. Resource Configuration Submenu

Feature Options Description

Memory Reservation

ECC Configuration

IRQ Reservation

• C800 - CBFF Available (default) | Reserved

• CC00- CFFF Available (default) | Reserved

• D000 - D3FF Available (default) | Reserved

• D400 - D7FF Available (default) | Reserved

• D800 - DBFF Available (default) | Reserved

• DC00 - DFFF Available (default) | Reserved

Memory hole Disabled (default) | Conventional | Extended

• Non-ECC (default)

• ECC

• IRQ3 Available (default) | Reserved

• IRQ4 Available (default) | Reserved

• IRQ5 Available (default) | Reserved

• IRQ7 Available (default) | Reserved

• IRQ9 Available (default) | Reserved

• IRQ10 Available (default) | Reserved

• IRQ11 Available (default) | Reserved

• IRQ15 Available (default) | Reserved

An * (asterisk) next to an IRQ indicates an IRQ conflict.

Reserves specific upper memory blocks for use by legacy ISA devices.

Indicates if ECC memory is present.

Reserves specific IRQs for use by legacy ISA devices.

4.3.2 Peripheral Configuration Submenu

This submenu is for the configuring the computer peripherals.

Table 32. Peripheral Configuration Submenu

Feature Options Description

Serial Port A

Serial Port B

Mode

Parallel Port

Mode

Floppy Disk Controller

IDE Controller

Audio

LAN

Legacy USB Support

• Disabled

• Enabled

• Auto (default)

• Disabled

• Enabled

• Auto (default)

• Normal (default)

• IrDA

• ASK-IR

• Disabled

• Enabled

• Auto (default)

• Output Only

• Bi-directional (default)

• EPP

• ECP

• Disabled

• Enabled (default)

• Disabled

• Primary

• Secondary

• Both (default) (primary

and secondary)

• Disabled

• Enabled (default)

• Disabled

• Enabled (default)

• Disabled (default)

• Enabled

Used to configure serial port A. Auto assigns the first free COM port, normally COM1,

the address 3F8h and the interrupt IRQ4. An * (asterisk) indicates a conflict with another device. Used to configure serial port B. Auto assigns the first free COM port, normally COM2,

the address 2F8h and the interrupt IRQ3. An * (asterisk) indicates a conflict with another device. If either serial port address is set, that address will not

appear in the list of options for the other serial port. If an ATI mach32

active as an add-in card, the COM4, 2E8h address will not appear in the list of options for either serial port.

Sets the mode for Serial Port B for normal (COM2) or infrared applications.

Configures the parallel port. Auto assigns LPT1 the address 378h and the interrupt

IRQ7. An * (asterisk) indicates a conflict with another device. Selects the mode for the parallel port. Output Only operates in AT Bi-directional operates in bi-directional PS/2-compatible

mode. EPP is Extended Parallel Port mode, a high-speed bi-

directional mode. ECP is Enhanced Capabilities Port mode, a high-speed

bi-directional mode. Configures the floppy disk controller.

Configures the IDE controller.

Enables or disables the onboard audio subsystem.

Enables or disables the onboard LAN subsystem.

Enables or disables BIOS support for USB keyboards and mice.

BIOS Setup Program

†

or an ATI mach64† video controller is

†

-compatible mode.

NX440LX Motherboard Technical Product Specification

4.3.3 Keyboard Configuration Submenu

Table 33. Keyboard Configuration Submenu

Feature Options Description

Numlock

Key Click

Keyboard Auto-repeat Rate

Keyboard Auto-repeat Delay

• Auto (default)

• On

• Off

• Disabled (default)

• Enabled

• 30/sec (default)

• 26.7/sec

• 21.8/sec

• 18.5/sec

• 13.3/sec

• 10/sec

• 6/sec

• 2/sec

• ¼ sec

• ½ sec (default)

• ¾ sec

• 1 sec

Sets the power on state of the Numlock feature on the numeric keypad of the keyboard.

Enables the key click option.

Selects the key repeat rate.

Selects the delay before key repeat.

4.3.4 Video Configuration Submenu

Table 34. Video Configuration Submenu

Feature Options Description

Palette Snooping

• Disabled (default)

• Enabled

4.3.5 DMI Event Logging Submenu

Table 35. DMI Event Logging Submenu

Feature Options Description

Event Log Capacity None Indicates if there is space available in the event log. Event Log Validity None Indicates if the contents of the event log are valid. View DMI Event Log None Enables viewing of DMI event log. Clear All DMI Event Logs

Event Logging

ECC Event Logging

Mark DMI Events as read None Marks all DMI events as read.

• No (default)

• Yes

• Disabled

• Enabled (default)

• Disabled (default)

• Enabled

Controls the ability of a primary PCI graphics controller to share a common palette with an ISA add-in video card.

Clears the DMI Event Log after rebooting.

Enables logging of DMI events.

4.4 Security Menu

This menu is for setting passwords and security features for the computer.

Table 36. Security Menu

Feature Options Description

User Password Is None Reports if there is a user password set. Supervisor Password Is None Reports if there is a supervisor

Set User Password Password can be up to seven

alphanumeric characters.

Set Supervisor Password Password can be up to seven

alphanumeric characters.

Unattended Start

• Disabled (default)

• Enabled

BIOS Setup Program

password set. Sets the user password.

Sets the supervisor password.

Sets the unattended start feature. When enabled, the computer boots, but the keyboard is locked. Enter the user password unlocks the computer. The user password is required to boot from a floppy diskette.

4.5 Power Menu

This menu is for setting power management features for the computer.

Table 37. Power Menu

Feature Options Description

Power Management

Inactivity Timer

Hard Drive

VESA Video Power Down

• Disabled

• Enabled (default)

• Off (default)

• 1 Minute

• 2 Minutes

• 4 Minutes

• 6 Minutes

• 8 Minutes

• 12 Minutes

• 16 Minutes

• Disabled

• Enabled (default)

• Disabled

• Enabled (default)

Enables or disables the BIOS power management feature.

Sets the amount of time before the computer enters standby mode.

Enables the hard disks to be power managed during standby and suspend modes.

Enables power management for video during standby and suspend modes.

NX440LX Motherboard Technical Product Specification

4.6 Boot Menu

This menu is for setting the boot features for the computer.

Table 38. Boot Menu

Feature Options Description

Restore on AC/Power Loss

On Modem Ring

On LAN

Quick Boot Mode

Scan User Flash Area

First Boot Device Second Boot Device Third Boot Device Fourth Boot Device Fifth Boot Device

Hard Drive, submenu None Lists drives available. When selected, displays the

Removable Devices, submenu

• Stay Off

• Last State (default)

• Power On

• Stay Off

• Power On (default)

• Stay Off

• Power On (default)

• Enabled (default)

• Disabled

• Enabled

• Disabled (default)

• Hard Drive

• Removable devices

• ATAPI CD-ROM

• LANDesk (R)

Services Agent

• Network boot

None Lists available removable devices. When selected,

Specifies action following a power failure if computer is powered on.

Stay Off keeps power off until power button pressed. Power On restores previous power state before power

was lost. Specifies action of computer when power is off and an

incoming call is detected on an installed modem. Specifies action of computer when power is off and

LAN activity is detected on. Enables the computer to boot without running certain

POST tests. Enables the BIOS to scan the flash memory for user

binaries. Specifies the boot sequence from the available

devices. To specify boot sequence:

1. Select the boot device with <↑> or <↓>.

2. Press <+> to move the device up the list or <-> to move the device down the list.

The operating system assigns drive letters to the devices in the order listed. The order can be changed and therefore the drive lettering for these devices.

Hard Drive submenu. See Section 4.6.1.

displays the Removable Devices submenu. See Section 4.6.2.

4.6.1 Hard Drive Submenu

Table 39. Hard Drive Submenu

Options Description

• Installed hard drive

• Bootable ISA Cards

Specifies the boot sequence for the hard drives attached to the computer. To specify boot sequence:

1. Select the boot device with <↑> or <↓>.

2. Press <+> to move the device up the list or <-> to move the device down the list.

The operating system assigns drive letters to the devices in the order listed. The order can be changed and therefore the drive lettering for these devices.

4.6.2 Removable Devices Submenu

Table 40. Removable Devices Submenu

Options Description

• Legacy Floppy Drives

Specifies the boot sequence for the removable devices attached to the computer. To specify boot sequence:

1. Select the boot device with <↑> or <↓>.

2. Press <+> to move the device up the list or <-> to move the device down the list.

The operating system assigns drive letters to the devices in the order listed. The order can be changed and therefore the drive lettering for these devices.

4.7 Exit Menu

This section describes how to exit the Setup program. The screen features have no options.

Table 41. Exit Menu

BIOS Setup Program

Feature Description

Exit Saving Changes Exits Setup and saves the changes in CMOS RAM. Exit Discarding Changes Exits Setup program without saving any changes. Any changes made in

Setup are not saved.

Load Setup Defaults Returns all of the Setup options to their defaults. The default Setup values are

loaded from the ROM table. Load Custom Defaults Loads the setup settings from the Custom Defaults. Save Custom Defaults Normally, the BIOS reads the setup settings from flash memory. If this

memory is corrupted, the BIOS uses the custom defaults. If no custom

defaults are set, the BIOS uses the factory defaults. Discard Changes Discards any changes made without exiting Setup. The option values that

were present when the computer was turned on are used.

NX440LX Motherboard Technical Product Specification

5 Error Messages and Beep Codes

5.1 BIOS Error Messages

Table 42. BIOS Error Messages

Error Message Explanation

Diskette drive A error or Diskette drive B error

Extended RAM Failed at offset:

nnnn

Failing Bits:

Fixed Disk 0 Failure or Fixed Disk 1 Failure or Fixed Disk Controller Failure

Incorrect Drive A type - run SETUP

Incorrect Drive B type - run SETUP

Invalid NVRAM media type Problem with NVRAM (CMOS) access. Keyboard controller error The keyboard controller failed test. Try replacing the keyboard. Keyboard error Keyboard not working. Keyboard error nn BIOS discovered a stuck key and displays the scan code nn for the stuck

Keyboard locked - Unlock key switch

Monitor type does not match CMOS - Run SETUP

Operating system not found Operating system cannot be located on either drive A: or drive C:. Enter

Parity Check 1 Parity error found in the system bus. BIOS attempts to locate the

Parity Check 2 Parity error found in the I/O bus. BIOS attempts to locate the address

Press <F1> to resume, <F2> to Setup

nnnn

Drive A: or B: is present but fails the POST diskette tests. Ensure that the drive controller is enabled, the drive is correctly installed, and the drive type is properly defined in Setup.

Extended memory not working or not configured properly at offset

The hex number Extended, or Shadow memory) that failed the memory test. Each 1 in the map indicates a failed bit.

Fixed disk is not working or not configured properly. Check to see if fixed disk is installed properly. Run Setup be sure the fixed-disk type is correctly identified and enabled.

Type of floppy drive for drive A: not correctly identified in Setup.

Type of floppy drive for drive B: not correctly identified in Setup.

key. Unlock the system to proceed.

Monitor type not correctly identified in Setup.

Setup and see if fixed disk and drive A: are properly identified.

address and display it on the screen. If it cannot locate the address, it displays ????.

and display it on the screen. If it cannot locate the address, it displays ????.

Displayed after any recoverable error message. Press <F1> to start the boot process or <F2> to enter Setup and change any settings.

nnnn

is a map of the bits at the RAM address (System,

nnnn

continued ☛

NX440LX Motherboard Technical Product Specification

Table 42. BIOS Error Messages

Error Message Explanation

Real time clock error Real-time clock fails BIOS test. May require motherboard repair. Shadow RAM Failed at offset:

nnnn

System battery is dead Replace and run SETUP

System cache error - Cache disabled

System CMOS checksum bad run SETUP

System RAM Failed at offset:

nnnn

System timer error The timer test failed. Requires repair of system motherboard.

(continued)

Shadow RAM failed at offset was detected.

The CMOS clock battery indicator shows the battery is dead. Replace the battery and run Setup to reconfigure the system.

RAM cache failed the BIOS test. BIOS disabled the cache.

System CMOS RAM has been corrupted or modified incorrectly, perhaps by an application program that changes data stored in CMOS. Run Setup and reconfigure the system either by getting the default values and/or making your own selections.

System RAM failed at offset was detected.

nnnn

of the 64 KB block at which the error

nnnn

of the 64 KB block at which the error

5.2 Port 80h POST Codes

During the POST, the BIOS generates diagnostic progress codes (POST codes) to I/O port 80h. If the POST fails, execution stops and the last POST code generated is left at port 80h. This code is useful for determining the point where an error occurred.

Displaying the POST codes requires an add-in card (often called a POST card). The POST card can decode the port and display the contents on a medium such as a seven-segment display. These cards can be purchased from JDR Microdevices or other sources.

The following table provides the POST codes that can be generated by the BIOS. Some codes are repeated in the table because that code applies to more than one operation.

Table 43. Port 80h Codes

Code Description of POST Operation

02h Verify real mode 03h Disable non-maskable interrupt (NMI) 04h Get processor type 06h Initialize system hardware 08h Initialize chipset with initial POST values 09h Set IN POST flag 0Ah Initialize CPU registers 0Bh Enable CPU cache 0Ch Initialize caches to initial POST values 0Eh Initialize I/O component 0Fh Initialize the local bus IDE 10h Initialize power management

continued

☛

Error Messages and Beep Codes

Table 43. Port 80h Codes

Code Description of POST Operation Currently In Progress

11h Load alternate registers with initial POST valuesnew 12h Restore CPU control word during warm boot 13h Initialize PCI bus mastering devices 14h Initialize keyboard controller 16h BIOS ROM checksum 17h Initialize cache before memory autosize 18h 8254 timer initialization 1Ah 8237 DMA controller initialization 1Ch Reset programmable interrupt controller 20h Test DRAM refresh 22h Test keyboard controller 24h Set ES segment register to 4 GB 26h Enable A20 line 28h Autosize DRAM 29h Initialize POST memory manager 2Ah Clear 512 KB base RAM 2Ch RAM failure on address line 2Eh RAM failure on data bits 2Fh Enable cache before system BIOS shadow 30h RAM failure on data bits 32h Test CPU bus-clock frequency 33h Initialize POST dispatch manager 34h Test CMOS RAM 35h Initialize alternate chipset registers 36h Warm start shut down 37h Reinitialize the chipset (MB only) 38h Shadow system BIOS ROM 39h Reinitialize the cache (MB only) 3Ah Autosize cache 3Ch Configure advanced chipset registers 3Dh Load alternate registers with CMOS valuesnew 40h Set Initial CPU speed new 42h Initialize interrupt vectors 44h Initialize BIOS interrupts 45h POST device initialization 46h Check ROM copyright notice 47h Initialize manager for PCI option ROMs 48h Check video configuration against CMOS RAM data

(continued)

xxxx

* of low byte of memory bus

xxxx

* of high byte of memory bus

continued

☛

NX440LX Motherboard Technical Product Specification

Table 43. Port 80h Codes

Code Description of POST Operation Currently In Progress

49h Initialize PCI bus and devices 4Ah Initialize all video adapters in system 4Bh Display QuietBoot screen 4Ch Shadow video BIOS ROM 4Eh Display BIOS copyright notice 50h Display CPU type and speed 51h Initialize EISA motherboard 52h Test keyboard 54h Set key click if enabled 56h Enable keyboard 58h Test for unexpected interrupts 59h Initialize POST display service 5Ah Display prompt "Press F2 to enter SETUP" 5Bh Disable CPU cache 5Ch Test RAM between 512 and 640 KB 60h Test extended memory 62h Test extended memory address lines 64h Jump to UserPatch1 66h Configure advanced cache registers 67h Initialize multiprocessor APIC 68h Enable external and processor caches 69h Setup System Management Mode (SMM) area 6Ah Display external L2 cache size 6Ch Display shadow-area message 6Eh Display possible high address for UMB recovery 70h Display error messages 72h Check for configuration errors 74h Test real-time clock 76h Check for keyboard errors 7Ah Test for key lock on 7Ch Set up hardware interrupt vectors 7Eh Initialize coprocessor if present 80h Disable onboard Super I/O ports and IRQs 81h Late POST device initialization 82h Detect and install external RS232 ports 83h Configure non-MCD IDE controllers 84h Detect and install external parallel ports 85h Initialize PC-compatible PnP ISA devices

(continued)

continued

☛

Error Messages and Beep Codes

Table 43. Port 80h Codes

Code Description of POST Operation Currently In Progress

86h Re-initialize onboard I/O ports 87h Configure motherboard configurable devices 88h Initialize BIOS Data Area 89h Enable Non-Maskable Interrupts (NMIs) 8Ah Initialize extended BIOS data area 8Bh Test and initialize PS/2 mouse 8Ch Initialize floppy controller 8Fh Determine number of ATA drives 90h Initialize hard-disk controllers 91h Initialize local-bus hard-disk controllers 92h Jump to UserPatch2 93h Build MPTABLE for multiprocessor boards 94h Disable A20 address line (Rel. 5.1 and earlier) 95h Install CD ROM for boot 96h Clear huge ES segment register 97h Fix up multiprocessor table 98h Search for option ROMs 99h Check for SMART Drive 9Ah Shadow option ROMs 9Ch Set up power management 9Eh Enable hardware interrupts 9Fh Determine number of ATA and SCSI drives A0h Set time of day A2h Check key lock A4h Initialize typematic rate A8h Erase F2 prompt Aah Scan for F2 key stroke Ach Enter SETUP Aeh Clear IN POST flag B0h Check for errors B2h POST done - prepare to boot operating system B4h One short beep before boot B5h Terminate QuietBoot B6h Check password (optional) B8h Clear global descriptor table B9h Clean up all graphics Bah Initialize DMI parameters BBh Initialize PnP Option ROMs

(continued)

continued

☛

NX440LX Motherboard Technical Product Specification

Table 43. Port 80h Codes

Code Description of POST Operation Currently In Progress

BCh Clear parity checkers BDh Display MultiBoot menu Beh Clear screen (optional) BFh Check virus and backup reminders C0h Try to boot with INT 19h C1h Initialize POST Error Manager (PEM) C2h Initialize error logging C3h Initialize error display function C4h Initialize system error handler E0h Initialize the chipset E1h Initialize the bridge E2h Initialize the processor E3h Initialize system timer E4h Initialize system I/O E5h Check force recovery boot E6h Checksum BIOS ROM E7h Go to BIOS E8h Set huge segment E9h Initialize multiprocessor Eah Initialize OEM special code Ebh Initialize PIC and DMA Ech Initialize memory type Edh Initialize memory size Eeh Shadow boot block Efh System memory test F0h Initialize interrupt vectors F1h Initialize runtime clock F2h Initialize video F3h Initialize beeper F4h Initialize boot F5h Clear huge segment F6h Boot to mini-DOS F7h Boot to full DOS

(continued)

Error Messages and Beep Codes

5.3 BIOS Beep Codes

Beep codes represent a terminal error. If the BIOS detects a terminal error condition, it outputs an error beep code, halts the POST, and attempts to display a port 80h code on the POST card’s LED display.

Table 44. Beep Codes

Beeps 80h Code Description

1 B4h One short beep before boot 1-2 98h Search for option ROMs 1-2-2-3 16h BIOS ROM checksum 1-3-1-1 20h Test DRAM refresh 1-3-1-3 22h Test 8742 keyboard controller 1-3-4-1 2Ch RAM failure on address line 1-3-4-3 2Eh RAM failure on data bits 1-4-1-1 30h RAM failure on data bits 2-1-2-3 46h Check ROM copyright notice 2-2-3-1 58h Test for unexpected interrupts

xxxx

* of low byte of memory bus

xxxx

* of high byte of memory bus

NX440LX Motherboard Technical Product Specification

6 Specifications and Customer Support

6.1 Online Support

You will find information about Intel boards under “Product Info” or “Customer Support” at the following World Wide Web site:

http://www.intel.com/ NLX specifications and recommendations can be found at the following web site: http://www.teleport.com/~nlx/

6.2 Specifications

The motherboard complies with the following specifications:

Table 45. Specifications

Specification Description Revision Level

A.G.P. Accelerated Graphics Port

Interface Specification

APM Advanced Power

Management BIOS interface specification

ATA-3 Information Technology - AT

Attachment-3 Interface

ATAPI ATA Packet Interface for

CD-ROMs

Revision 1.0, August, 1996, Intel Corporation. The specification is available through the Accelerated Graphics Implementers Forum at:

http://www.agpforum.org/. Revision 1.2, February, 1996

Intel Corporation, Microsoft Corporation

X3T10/2008D Revision 6 ATA Anonymous FTP Site: fission.dt.wdc.com

http://www.microsoft.com/hwdev/desguid/ http://developer.intel.com/pc98/ SFF-8020i Revision 2.5

(SFF) Fax Access: (408) 741-1600

DMI Desktop Management

Interface BIOS specification

El Torito Bootable CD-ROM format

specification

EPP Enhanced Parallel Port IEEE 1284 standard, Mode [1 or 2], v1.7

Version 2.1, June 16, 1997 American Megatrends Inc., Award Software International Inc., Dell Computer Corporation, Intel Corporation, Phoenix Technologies Ltd., SystemSoft Corporation

http://www.ptltd.com/techs/specs.html Version 1.0, January 25, 1995

Phoenix Technologies Ltd., IBM Corporation. The El Torito specification is available on the Phoenix Web site

http://www.ptltd.com/techs/specs.html.

continued ☛

NX440LX Motherboard Technical Product Specification

Table 45. Specifications

IrDA Serial Infrared Physical Layer

Link specification

NLX NLX form factor specification Revision 1.2, February 1997

NLX Power Supply

PCI PCI Local Bus specification Revision 2.1, June 1, 1995, PCI Special Interest Group

Phoenix BIOS PhoenixBIOS Revision 4.0, February 27, 1997,

Plug and Play Plug and Play BIOS

USB Universal serial bus

NLX Power Supply Recommendations

specification

(continued)

Version 1.1, October 17, 1995 Infrared Data Association. Phone: (510) 943-6546 Fax: (510) 943-5600

E-mail: irda@netcom.com

Intel Corporation, The specification is available at: http://www.teleport.com/~nlx/ Revision 1.1, May 1997. Intel Corporation. The

recommendation is available at: http://www.teleport.com/~nlx/

http://www.intel.com/

Phoenix Technologies Ltd. Version 1.0a, May 5, 1994

Compaq Computer Corporation, Phoenix Technologies Ltd., Intel Corporation

Revision 1.0, January 15, 1996 Compaq Computer Corporation, Digital Equipment Corporation, IBM PC Company, Intel Corporation, Microsoft Corporation, NEC, Northern Telecom

http://www.intel.com/

Intel NX440LX User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Table of Contents

1 Motherboard Description

1.1 Overview

1.2 Form Factor

1.3 I/O Shield

1.4 Microprocessor

1.4.1 Microprocessor Packaging

1.4.2 Second-Level Cache

1.4.3 Microprocessor Upgrades

1.5 Memory

1.5.1 Main Memory

1.5.2 SDRAM

1.5.3 ECC Memory

1.6 Chipset

1.6.1 Intel 82443LX PCI/A.G.P. Controller

1.6.2 Intel 82371AB PCI ISA IDE Xcelerator (PIIX4)

1.6.3 Accelerated Graphics Port (A.G.P.)

1.6.4 Universal Serial Bus (USB)

1.6.5 IDE Support

1.6.6 Real-Time Clock, CMOS SRAM, and Battery

1.7 I/O Interface Controller

1.7.1 Serial Ports

1.7.2 Parallel Port

1.7.3 Floppy Controller

1.7.4 Keyboard and Mouse Interface

1.7.5 Optional Infrared

1.8 Audio Subsystem

1.8.1 OPL3-SA3 Audio System

1.8.2 Audio Subsystem Resources

1.8.3 Audio Drivers and Utilities

1.8.4 Audio Connectors

1.9 Hardware Monitor

1.10 Tamper Detection

1.11 Onboard Networking

1.11.1 Intel 82557 LAN Controller

1.11.2 Intel 82555 PHY 10 / 100 Mbit/sec Physical Layer Interface

1.11.3 Remote Wakeup Controller

1.11.4 LAN Software

1.12 Motherboard Connectors

1.13 Back Panel Connectors

1.14 Onboard Video Configuration Jumper Block

1.15 Configuration Jumper

1.15.1 Normal Mode

1.15.2 Configuration Mode

1.15.3 Recovery Mode

1.16 NLX Card Edge Connector

1.17 Reliability

1.18 Environmental

1.19 Power Consumption

1.20 Regulatory Compliance

1.20.1 Safety

1.20.2 EMI

1.20.3 Product Certification Markings

2 Motherboard Resources

2.1 Memory Map

2.2 DMA Channels

2.3 I/O Map

2.4 PCI Configuration Space Map

2.5 Interrupts

2.6 PCI Interrupt Routing Map

3 Overview of BIOS Features

3.1 BIOS Upgrades

3.2 BIOS Flash Memory Organization

3.3 Plug and Play: PCI Autoconfiguration

3.4 PCI IDE Support

3.5 ISA Plug and Play

3.6 ISA Legacy Devices

3.7 Desktop Management Interface (DMI)

3.8 Advanced Power Management (APM)

3.9 Language Support

3.10 Boot Options

3.11 OEM Logo or Scan Area

3.12 USB Support

3.13 BIOS Setup Access

3.14 Recovering BIOS Data

4 BIOS Setup Program