Intel JN440BX User Manual
JN440BX Motherboard
Technical Product Specification
April, 1998
Order Number
The JN440BX motherboard may contain design defects or errors known as errata. Characterized errata that may cause the JN440BX motherboard’s behavior to deviate from
published specifications are documented in the JN440BX Motherboard Specification Update.
699414-001
Revision History
Revision Revision History Date
-001 First released version April 1998
This product specification applies only to standard JN440BX motherboards with BIOS identifier
4J4NB0X1
Changes to this specification will be published in the JN440BX 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 JN440BX 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 5937
Denver, CO 80217-9808
or call in North America 1-800-548-4725, Europe 44-0-1793-431-155, France 44-0-1793-421-777,
Germany 44-0-1793-421-333, other Countries 708-296-9333.
†
Brand, name or trademark owned by another company.
Copyright
Intel Corporation, 1998. All rights reserved.
Contents
1 Motherboard Description
1.1 Overview .....................................................................................................................7
1.2 Motherboard Layout .................................................................................................... 9
1.3 Form Factor................................................................................................................11
1.4 I/O Shield....................................................................................................................12
1.5 Microprocessor..........................................................................................................13
1.5.1 Microprocessor Packaging...........................................................................13
1.5.2 Second-Level Cache....................................................................................13
1.5.3 Microprocessor Upgrades............................................................................13
1.6 Main Memory..............................................................................................................14
1.6.1 SDRAM........................................................................................................14
1.6.2 ECC Memory................................................................................................15
1.7 Chipset.......................................................................................................................16
®
1.7.1 Intel
1.7.2 Intel
1.7.3 Accelerated Graphics Port (A.G.P.)..............................................................18
1.7.4 Universal Serial Bus (USB) ..........................................................................18
1.7.5 IDE Support .................................................................................................19
1.7.6 Real-Time Clock, CMOS SRAM, and Battery...............................................19
1.8 I/O Controller..............................................................................................................20
1.8.1 Keyboard and Mouse Interface ....................................................................20
1.8.2 Parallel Port..................................................................................................20
1.8.3 Diskette Drive Controller ..............................................................................21
1.8.4 Serial Ports ..................................................................................................21
1.8.5 Optional Infrared ..........................................................................................21
1.9 Audio Subsystem........................................................................................................21
1.9.1 Crystal Semiconductor CS4235 Audio Codec..............................................21
1.9.2 Audio Connectors.........................................................................................22
1.9.3 Audio Drivers and Utilities ............................................................................22
1.10 Graphics Subsystem ..................................................................................................23
1.10.1 ATI Rage Pro Turbo 2X Graphics Controller ................................................23
1.11 Hardware Monitor.......................................................................................................24
1.12 Onboard Networking...................................................................................................24
1.12.1 Intel
1.12.2 Alert On LAN Component.............................................................................25
1.12.3 LAN Software...............................................................................................25
1.13 Motherboard Connectors............................................................................................26
1.14 Back Panel Connectors..............................................................................................28
1.15 Configuration Jumper.................................................................................................32
1.15.1 Normal Mode................................................................................................33
1.15.2 Configuration Mode......................................................................................33
1.15.3 Recovery Mode............................................................................................33
1.16 NLX Card Edge Connector.........................................................................................34
82443BX PCI/A.G.P. Controller (PAC) ...............................................16
®
82371EB PCI ISA IDE Xcelerator (PIIX4E).........................................17
®
82558 LAN Controller.........................................................................24
iii
Contents
1.17 Reliability....................................................................................................................41
1.18 Environmental ............................................................................................................42
1.19 Power Consumption...................................................................................................43
1.20 Regulatory Compliance ..............................................................................................44
1.20.1 Product Certification Markings......................................................................44
2 Motherboard Resources
2.1 Memory Map ..............................................................................................................45
2.2 DMA Channels ...........................................................................................................45
2.3 I/O Map ......................................................................................................................46
2.4 PCI Configuration Space Map ....................................................................................48
2.5 Interrupts....................................................................................................................48
2.6 PCI Interrupt Routing Map..........................................................................................49
3 Overview of BIOS Features
3.1 BIOS Upgrades ..........................................................................................................51
3.2 4 Mbit E28F004S5 Symmetrical Flash Memory..........................................................51
3.3 Plug and Play: PCI Autoconfiguration........................................................................53
3.4 PCI IDE Support.........................................................................................................53
3.5 ISA Plug and Play.......................................................................................................54
3.6 ISA Legacy Devices ...................................................................................................54
3.7 Desktop Management Interface (DMI)........................................................................54
3.8 Advanced Power Management (APM)........................................................................55
3.9 Advanced Configuration and Power Interface (ACPI).................................................55
3.9.1 System States and Power States.................................................................56
3.9.2 Wake Up Devices and Events......................................................................57
3.9.3 Plug and Play...............................................................................................57
3.9.4 BIOS Support...............................................................................................57
3.10 Language Support......................................................................................................57
3.11 Boot Options...............................................................................................................58
3.12 OEM Logo or Scan Area ............................................................................................58
3.13 USB Legacy Support..................................................................................................58
3.14 BIOS Setup Access....................................................................................................59
3.15 Recovering BIOS Data ...............................................................................................59
4 BIOS Setup Program
4.1 Maintenance Menu.....................................................................................................62
4.2 Main Menu..................................................................................................................62
4.3 Advanced Menu..........................................................................................................63
4.3.1 Peripheral Configuration Submenu...............................................................64
4.3.2 IDE Configuration.........................................................................................65
4.3.3 IDE Configuration Submenus.......................................................................66
4.3.4 Floppy Options.............................................................................................67
4.3.5 DMI Event Logging.......................................................................................67
4.3.6 Video Configuration Submenu......................................................................67
4.3.7 Resource Configuration Submenu................................................................68
4.4 Security Menu ............................................................................................................68
4.5 Power Menu...............................................................................................................69
iv
4.6 Boot Menu..................................................................................................................69
4.6.1 Hard Drive Submenu....................................................................................70
4.6.2 Removable Devices Submenu.....................................................................71
4.7 Exit Menu ...................................................................................................................71
5 Error Messages and Beep Codes
5.1 BIOS Error Messages.................................................................................................73
5.2 Port 80h POST Codes................................................................................................74
5.3 BIOS Beep Codes......................................................................................................79
6 Specifications and Customer Support
6.1 Online Support ...........................................................................................................81
6.2 Specifications .............................................................................................................81
Figures
1. Motherboard Block Diagram........................................................................................ 9
2. Motherboard Components..........................................................................................10
3. Motherboard Dimensions............................................................................................11
4. Back Panel I/O Shield Dimensions.............................................................................12
5. Motherboard Connectors............................................................................................26
6. Back Panel I/O Connectors ........................................................................................28
7. Configuration Jumper Block........................................................................................32
8. Memory Map of the Flash Device...............................................................................52
Contents
Tables
1. CD-ROM Connector (J8M1).......................................................................................26
2. Processor Fan (J2A1).................................................................................................27
3. Accelerated Graphics Port (J1K1) ..............................................................................27
4. Line-In Connector (1/8” Stereo jack) (J9P1) ..............................................................29
5. Line-Out Connector (1/8” Stereo jack) (J8P1)............................................................29
6. Microphone Connector (1/8” Stereo jack) (J8P2)......................................................29
7. RJ-45 LAN Connector (J7P2).....................................................................................29
8. USB Connector (J6P1)...............................................................................................30
9. Serial Port A and B Connectors (J3P1 and J5P1)......................................................30
10. Keyboard/Mouse Connectors (J4P1).........................................................................30
11. Parallel Port Connector (J2P1)..................................................................................31
12. VGA Connector (J1P1)...............................................................................................31
13. Configuration Jumper Settings (J5G1)........................................................................32
14. PCI Segment, Riser Interconnect ...............................................................................34
15. ISA Segment, Riser Interconnect ...............................................................................36
16. IDE, Floppy, and Front Panel Section, Riser Interconnect..........................................37
17. Signals, NLX Riser with Supplemental Connector ......................................................40
18. Motherboard Environmental Specifications.................................................................42
19. DC Voltage.................................................................................................................43
20. Power Usage..............................................................................................................43
21. Processor Fan DC Power Requirements (J2A1).........................................................43
22. Safety Regulations .....................................................................................................44
23. EMC Regulations........................................................................................................44
v
Contents
24. System Memory Map..................................................................................................45
25. DMA Channels ...........................................................................................................45
26. I/O Map ......................................................................................................................46
27. PCI Configuration Space Map....................................................................................48
28. Interrupts....................................................................................................................48
29. PCI Interrupt Routing Map..........................................................................................49
30. Flash Memory Organization........................................................................................52
31. Recommendations for Configuring an ATAPI Device..................................................53
32. Effects of Pressing the Power Switch.........................................................................55
33. Power States and Targeted System Power................................................................56
34. Wake Up Devices and Events ....................................................................................57
35. Setup Menu Bar .........................................................................................................61
36. Setup Function Keys ..................................................................................................61
37. Maintenance Menu.....................................................................................................62
38. Main Menu..................................................................................................................62
39. Advanced Menu..........................................................................................................63
40. Peripheral Configuration Submenu.............................................................................64
41. IDE Device Configuration ...........................................................................................65
42. IDE Configuration Submenus .....................................................................................66
43. Default Values By IDE Device Type ...........................................................................66
44. Floppy Options ...........................................................................................................67
45. DMI Event Logging Submenu.....................................................................................67
46. Video Configuration Submenu....................................................................................67
47. Resource Configuration Submenu..............................................................................68
48. Security Menu ............................................................................................................68
49. Power Menu...............................................................................................................69
50. Boot Menu..................................................................................................................69
51. Hard Drive Submenu..................................................................................................70
52. Removable Devices Submenu....................................................................................71
53. Exit Menu ...................................................................................................................71
54. BIOS Error Messages.................................................................................................73
55. Port 80h Codes ..........................................................................................................74
56. Beep Codes................................................................................................................79
57. Specifications .............................................................................................................81
vi
1 Motherboard Description
1.1 Overview
The JN440BX motherboard is a versatile platform that offers a wide variety of features. Some 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.
Microprocessor
£
x
Single Pentium
x
66 MHz and 100 MHz host bus speeds
x
Integrated 512 KB or 1 MB of second level cache
x
Slot 1 connector
NOTE
✏
Pentium II processors with 100 MHz front-side bus should be paired only with 100 MHz SDRAM.
Processors with 66 MHz front side bus can be paired with either 66 MHz or 100 MHz SDRAM.
II processor
The motherboard features:
x
NLX v1.2 form factor
x
Minimal jumper design
Main Memory
x
Three 168-pin DIMM sockets
x
Support for up to 384 MB of synchronous DRAM (SDRAM)
x
Support for 66 MHz and 100 MHz SDRAM
x
Support for ECC and non-ECC memory
Chipset and PCI/IDE Interface
®
x
x
x
x
x
x
82440BX AGPset PCI/A.G.P. Controller (PAC)
Intel
Integrated PCI bus mastering controller using PIIX4E
Dual channel EIDE interface
Real-time clock
PCI Slots
Automatic detection of Host Bus speed
‡
‡
7
JN440BX Motherboard Technical Product Specification
I/O Features
x
SMC FDC37C777 I/O controller
x
Single diskette drive interface
x
Integrates standard I/O functions: one multi-mode parallel port, two FIFO serial ports, and
keyboard and mouse controller
x
Support for one Universal Serial Bus (USB) interface on the motherboard and another on the
‡
riser
x
Support for consumer infrared in place of COM2
Audio Subsystem
x
Crystal Audio 4235 controller
†
x
Sound Blaster
x
Full-duplex audio functionality providing simultaneous record and playback under Windows
x
Back panel connectors (3.5 mm mini jacks)
Line-in
Line-out
Mic-in
x
BIOS setup-based software enable/disable/configure
x
Telephony audio support
x
PC ’97 compliant
x
Circuit to support an external speaker
x
Support for the auxiliary Audio NLX connector
compatible
‡
‡
‡
†
Graphics Subsystem
†
x
ATI RAGE
PRO TURBO† integrated 64-bit A.G.P. graphics accelerator with support for 3D
and motion video
4 MB of 100 MHz SGRAM
2D acceleration in 8/16/24/32 bpp modes
3D acceleration with compressed texture modes: YUV 4:2:2, CLUT 4 (C14), and
CLUT 8 (C18)
x
A.G.P. connector support for 66 MHz and 133 MHz fully pipelined operation and sideband
support
Local Area Network (LAN) Subsystem
x
10/100 Mbit/sec LAN hardware
x
Remote wakeup controller
Other features
x
Plug and Play compatible
x
Support for Advanced Power Management (APM)
x
Advanced Configuration and Power Management Interface (ACPI) ready
x
Support for Wired for Management (WfM) 1.1
x
Support for Management Level 4.0
8
1.2 Motherboard Layout
Figure 1 is a block diagram showing the relationship among the major components.
Motherboard Description
SDRAM
DIMM(3)
Pri. IDE
Sec. IDE
USB Port 1
USB Port 0
Card Edge (for Riser)
Back Panel
Clock
Generator
Pentium® II
Processor
82443BX
82371 EB
PIIX4E
PAC
A.G.P. Bus
SM Bus
PCI Bus
A.G.P.
Connector
A.G.P.
Controller
Mic
Line Out
Back Panel
Line In
Monitor
Hardware
Crystal Semi
Conductor
4235
Audio
Controller
Back Panel
82558 LAN
Controller
Alert on
LAN
Consumer IR or IrDA
Back Panel
ISA Bus
Floppy
Serial Port B
Serial Port A
Parallel Port
Super I/O
SMC
FDC37C777
Mouse
Keyboard
Back Panel
Figure 1. Motherboard Block Diagram
4 Mbit Symmetrical
Flash Memory
OM07087
9
JN440BX Motherboard Technical Product Specification
Figure 2 shows the location of the major components on the motherboard.
A
I
B
C
H
FG DE
A Back panel connectors F Slot 1 connector
B CD-ROM header G Fan connector
C Configuration jumper H DIMM sockets
D Battery I A.G.P. connector
E Piezoelectric speaker
Figure 2. Motherboard Components
OM07088
10
Motherboard Description
1.3 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.
0.10
0.0
0.0
0.20
0.50
0.327
0.15
0.349
0.60
8.70
0.260
8.80
4.207.60
Figure 3. Motherboard Dimensions
5.159
6.575
12.80
13.00
0.20
OM07089
11
JN440BX Motherboard Technical Product Specification
1.4 I/O Shield
The back panel I/O shield for the JN440BX 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 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
OM07100
12
Motherboard Description
1.5 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. In addition, the
host bus speeds (66 MHz and 100 MHz) is automatically selected. The motherboard supports all
current processor speeds, voltages, and bus frequencies.
1.5.1 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.
1.5.2 Second-Level Cache
The second-level cache is located on the substrate of the S.E.C. cartridge. The cache includes
pipelined burst synchronous static RAM (PBSRAM) and tag RAM. There can be two or four
PBSRAM components totaling 512 KB or 1024 KB in size. All supported onboard memory can be
cached.
1.5.3 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.
13
JN440BX Motherboard Technical Product Specification
1.6 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:
x
168-pin DIMMs with gold-plated contacts
x
66 and 100 MHz (matching Host Bus speed) unbuffered SDRAM only
x
Non-ECC (64-bit) and ECC (72-bit) memory
x
3.3 V memory only
x
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.
1.6.1 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
✏
All memory components and DIMMs used with the JN440BX motherboard must comply with the
PC SDRAM Specifications. These include: the PC SDRAM Specification (memory component
specific), the PC unbuffered SDRAM Specifications, and the PC Serial Presence Detect
Specification. Customers can access these document through the Internet at:
http://www.intel.com/design/pcisets/memory
See Section 6.2 for information about these specifications.
14
Motherboard Description
1.6.2 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 No error detection N/A
ECC DIMM No error detection Single-bit error correction, multiple-bit
error detection
15
JN440BX Motherboard Technical Product Specification
1.7 Chipset
The Intel 440BX AGPset includes a Host-PCI bridge integrated with both an optimized DRAM
controller and an Accelerated Graphics Port (A.G.P.) interface. The I/O subsystem of the 440BX
is based on the PIIX4E, which is a highly integrated PCI-ISA/IDE Accelerator Bridge. This
®
chipset consists of the Intel
PCI/ISA IDE Xccelerator (PIIX4E) bridge chip.
1.7.1 Intel® 82443BX PCI/A.G.P. Controller (PAC)
The PAC provides bus-control signals, address paths, and data paths for transfers between the
processor’s host bus, PCI bus, the A.G.P., and main memory. The PAC features:
x
Processor interface control
Support for processor host bus frequencies of 100 MHz or 66 MHz
32-bit addressing
Desktop Optimized GTL+ compliant host bus interface
x
Integrated DRAM controller, with support for:
+3.3 V only DIMM DRAM configurations
Up to three double sided DIMMs
Synchronous 100-MHz or 66-MHz SDRAM
DIMM serial presence detect via SMBus interface
16- and 64-Mbit devices with 2 K, 4 K, and 8 K page sizes
4, x 8, x 16, and x 32 DRAM widths
x
SDRAM 64-bit data interface with ECC support
Symmetrical and asymmetrical DRAM addressing
x
A.G.P. interface
Complies with the A.G.P. specification (see Section 6.2 for specification information)
Support for +3.3 V A.G.P. 66/133 devices
Synchronous coupling to the host-bus frequency
x
PCI bus interface
Complies with the PCI specification, +5 V 33 MHz interface (see Section 6.2 for
specification information)
Asynchronous coupling to the host-bus frequency
PCI parity generation support
Data streaming support from PCI-to-DRAM
Support for four PCI bus masters in addition to the host and PCI-to-ISA I/O bridge
Support for concurrent host, A.G.P., and PCI transactions to main memory
82443BX PCI/A.G.P. controller (PAC) and the Intel® 82371EB
16
x
Data buffering
DRAM write buffer with read-around-write capability
Dedicated host-to-DRAM, PCI0-to-DRAM, and PCI1/A.G.P.-to-DRAM read buffers
A.G.P. dedicated inbound/outbound FIFOs (133/66 MHz), used for temporary data storage
x
Power management functions
Support for system suspend/resume (DRAM and power-on suspend)
Compliant with ACPI power management
x
SMBus support for desktop management functions
x
Support for system management mode (SMM)
1.7.2 Intel® 82371EB PCI ISA IDE Xcelerator (PIIX4E)
The PIIX4E is a multifunction PCI device implementing the PCI-to-ISA bridge, PCI IDE
functionality, Universal Serial Bus (USB) host/hub functionality, and enhanced power
management. The PIIX4E features:
x
Multifunction PCI-to-ISA bridge
Support for the PCI bus at 33 MHz
Complies with the PCI specification (see Section 6.2 for specification information)
Full ISA bus support
x
USB controller
Two USB ports (see Section 6.2 for specification information)
Support for legacy keyboard and mouse
Support for UHCI interface
x
Integrated dual-channel enhanced IDE interface
Support for up to four IDE devices
PIO Mode 4 transfers at up to 16 MB/sec
Support for 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
x
Enhanced DMA controller
Two 8237-based DMA controllers
Support for PCI DMA with three PC/PCI channels and distributed DMA protocols
Fast type-F DMA for reduced PCI bus usage
x
Interrupt controller based on 82C59
Support for 15 interrupts
Programmable for edge/level sensitivity
x
Power management logic
Sleep/resume logic
†
Support for wake on modem and Wake on LAN
Support for ACPI (see Section 6.2 for specification information)
x
Real-Time Clock
256-byte battery-backed CMOS SRAM
Includes date alarm
x
16-bit counters/timers based on 82C54
technology
Motherboard Description
17
JN440BX Motherboard Technical Product Specification
1.7.3 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:
x
Pipelined-memory read and write operations that hide memory access latency
x
Demultiplexing of address and data on the bus for near 100 percent bus efficiency
x
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
✏
Only half-length NLX A.G.P. cards are supported.
1.7.4 Universal Serial Bus (USB)
The motherboard can support two‡ USB ports; however, it is shipped with only one port installed.
The second port must be 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:
x
Self-identifying peripherals that can be plugged in while the computer is running
x
Automatic mapping of function to driver and configuration
x
Supports isochronous and asynchronous transfer types over the same set of wires
x
Bandwidth and low latencies appropriate for telephony, audio, and other applications
x
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 USB device is
attached to the cable. Use shielded cable that meets the requirements for full-speed devices.
18
Motherboard Description
1.7.5 IDE Support
The motherboard has two independent bus-mastering capable PCI IDE interfaces. These interfaces
support PIO Mode 3, PIO Mode 4, ATAPI devices (such as 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.
The motherboard also supports laser servo (LS-120) drives. LS-120 technology allows the user to
perform read/write operations to LS-120 (120 MB) and conventional 1.44 MB and 720 KB
diskettes. LS-120 drives are ATAPI-compatible and connect to the motherboard's IDE interface.
†
Some versions of Windows 95 and Windows NT
a bootable device in both 120 MB and 1.44 MB mode.
Connection of an LS-120 drive and a standard 3.5-inch diskette drive is allowed. The LS-120
drive can be configured as a boot device if selected in the Setup program.
Bus master IDE drivers are available from Intel at the following web location:
http://developer.intel.com/design/pcisets/busmastr/
operating systems recognize the LS-120 drive as
1.7.6 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 SRAM in two banks that are reserved for BIOS
use.
The time, date, and SRAM values can be specified in the Setup program. The SRAM values can
be returned to their defaults by using the Setup program.
An external coin-cell battery powers the real-time clock and SRAM. 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 r 13 minutes/year at 25 ºC with 5 V applied.
NOTE
✏
The recommended method of accessing the date in systems with Intel motherboards is indirectly
from the Real Time Clock (RTC) via the BIOS. The BIOS on Intel motherboards and baseboards
contains a century checking and maintenance feature that checks the least two significant digits of
the year stored in the RTC during each BIOS request (INT 1Ah) to read the date and, if less
than 80 (i.e., 1980 is the first year supported by the PC), updates the century byte to 20. This
feature enables operating systems and applications using the BIOS date/time services to reliably
manipulate the year as a four-digit value.
For more information on proper date access in systems with Intel motherboards please see
http://support.intel.com/procs/support/year2000/status/motherboard paper.htm
19
JN440BX Motherboard Technical Product Specification
1.8 I/O Controller
The motherboard uses the SMC FDC37C777 I/O controller which features:
x
5 Volt operation
x
ISA Plug-and-Play compatible register set
x
Two serial ports or one serial port and one infrared port
x
Single diskette drive interface
x
FIFO support on both serial and diskette interfaces
x
One parallel port with ECP and EPP support
†
x
x
The Setup program provides configuration options for the I/O controller.
style mouse and keyboard interfaces
PS/2
Intelligent auto power management, including:
Shadowed write-only registers for ACPI compliance
Programmable wake-up event interface
1.8.1 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 a mouse or 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 controller supports the <Ctrl><Alt><Del> key sequence to reset 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,
1.8.2 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:
x
Compatible (standard mode)
x
Bi-directional (PS/2 compatible)
x
Bi-directional Enhanced Parallel Port (EPP). A driver from the peripheral manufacturer is
required for operation. See Section 6.2 for EPP compatibility
x
Bi-directional high-speed Extended Capabilities Port (ECP)
20
Motherboard Description
1.8.3 Diskette Drive Controller
The I/O controller is software compatible with the 82077 diskette drive controller. The diskette
drive connector is located on the riser card. In the Setup program, the interface can be configured
for the following drive capacities and sizes:
x
1.2 MB, 5.25-inch
x
1.2 MB, 3.5-inch (Mode 3 diskette support, driver required)
x
1.44 MB, 3.5-inch
x
2.88 MB, 3.5-inch
1.8.4 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.
1.8.5 Optional Infrared
There is no infrared header on the motherboard; however, the edge connector does accommodate
†
infrared signals from the riser. If an IrDA
Peripheral Configuration Submenu to change the mode for Serial Port B from COM2 to infrared
applications. You will no longer be able to use Serial Port B.
connector is available on the riser, use the BIOS
1.9 Audio Subsystem
The audio subsystem consists of the following:
x
Crystal Semiconductor CS4235 audio codec
x
Back panel and onboard audio connectors
1.9.1 Crystal Semiconductor CS4235 Audio Codec
The CS4235 audio codec’s features include:
†
x
Compatibility with Sound Blaster, Sound Blaster Pro
x
MPU-401 compatible MIDI and joystick interfaces
x
Advanced MPC3-compliant input and output mixer
, and Windows Sound System
21
JN440BX Motherboard Technical Product Specification
1.9.2 Audio Connectors
The audio connectors include the following:
x
Back panel connectors: stereo line-level output (Line-out), stereo line-level input (Line-in),
and Mic-in
x
CD-ROM audio header (Creative Labs style)
CAUTION
The LINE-OUT connector, following convention, is designed to power headphones or amplified
speakers ONLY. Do not connect passive (non-amplified) speakers to this output, as poor audio
quality and/or damage to the motherboard may occur.
1.9.3 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 Microsoft Windows 3.1, Microsoft Windows 95, and
Microsoft Windows NT operating systems.
22
Motherboard Description
1.10 Graphics Subsystem
The graphics subsystem features the ATI Rage† Pro Turbo 2X graphics controller. See Intel’s
World Wide Web site (see Section 6.1) for graphics drivers.
1.10.1 ATI Rage Pro Turbo 2X Graphics Controller
The ATI Rage Pro Turbo 2X Graphics Controller provides the following features:
x
Comprehensive A.G.P. support, including 1X (66 MHz) and 2X (133 MHz) fully pipelined
operation and sideband support
x
Full bus mastering support
x
Triple 8-bit palette DAC with gamma correction. Pixel rates up to 230 MHz
x
Supports DDC1 and DDC2B+ for Plug and Play monitors
†
x
Game acceleration including support for Microsoft’s DirectDraw
sprites, transparent blit, masked blit, and context chaining
x
4 KB on-chip texture cache
†
x
Direct3D
x
4 MB of 100 MHz SGRAM on the motherboard
texture lighting
: double buffering, virtual
1.10.1.1 Motion Video Acceleration
The ATI Rage Pro Turbo 2X supports motion video acceleration by providing:
x
Multistream video for video conferencing
x
Filtered horizontal/vertical, up/down, scaling enhances playback quality
x
Enhanced line buffer allows vertical filtering of native MPEG-2 size (720 x 480) images
x
DVD/MPEG-2 decode assist
x
Filter circuitry that eliminates video artifacts caused by displaying interlaced video on
noninterlaced displays
x
Hardware mirroring for flipping video images in video conferencing systems
x
Bidirectional bus mastering engine with planar YUV-to-packed format converter
x
YUV to RGB color space converter with support for both packed and planar YUV:
YUV 4:2:2, YUV 4:1:0, and YUV 4:2:0
RGB 32, RGB 16/15, RGB 8, and monochrome
1.10.1.2 Disabling On-Board A.G.P.
To provide an upgrade path, the on-board A.G.P. is disabled if an A.G.P. add-in card is used. Only
half-length NLX A.G.P. cards can be used with this motherboard.
23
JN440BX Motherboard Technical Product Specification
1.11 Hardware Monitor
The management extension hardware provides low-cost instrumentation capabilities on a chip.
The features include:
x
Integrated temperature sensor
x
Fan speed sensors
x
Power supply voltage monitoring to detect levels above or below acceptable values
£
x
Remote reset capabilities from a remote peer or server through LANDesk
Version 3.3 and service layers
Client Manager,
1.12 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:
x
32-bit direct bus mastering on the PCI bus
x
Shared memory structure in the host memory that copies data directly to/from host memory
x
10Base-T and 100Base-TX capability using a single RJ-45 connector
x
IEEE 802.3P Auto-Negotiation for the fastest available connection
x
Jumperless configuration; the LAN subsystem is completely software configurable
x
Remote wake up controller
1.12.1 Intel® 82558 LAN Controller
This device is the heart of the LAN subsystem. It provides the following functions:
x
CSMA/CD protocol engine
x
PCI compatibility
x
DMA engine for movement of commands, status, and network data across the PCI bus
x
Standard MII interface for access to IEEE 802.3P -compliant physical layer devices
24
Motherboard Description
1.12.2 Alert On LAN Component
The Alert on LAN component is a companion device to the Intel® 82558 LAN controller.
Together, these devices provide a management interface between a remote management console
(or management server) and a client system monitoring instrumentation. When an alert input is
asserted, the Alert on LAN component transmits Ethernet packets to the 82558 through an 8-bit
dedicated data path. Examples of events that can trigger alert messages to a management server
include:
x
Chassis intrusion
x
System BIOS hang (transmits POST code error)
x
LAN leash (transmits an alert that the LAN cable was disconnected)
x
Processor missing signal
x
Sensing an interrupt from the hardware monitor
1.12.3 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 Intel web site. See Section 6.1.
25
JN440BX Motherboard Technical Product Specification
1.13 Motherboard Connectors
Figure 5 shows the connectors on the motherboard.
B1
B66
DIMM Sockets(3)
A1
A. G. P
J1K1
A66
J1D1, J2D1
J2D2
J8M1
4
1
CD-ROM
Audio
Table 1. CD-ROM Connector (J8M1)
Pin Signal Name
1 Ground
2 CD-Left
3 Ground
4 CD-Right
26
Fan
1
3
CPU Slot
J4D1
J2A1
Figure 5. Motherboard Connectors
OM07091
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