Intel AN430TX - Motherboard - ATX Technical Product Specification

AN430TX Motherboard

Technical Product Specification

April, 1997 Order Number 282955-001

The AN430TX motherboard may contain design defects or errors known as errata which may cause the product to deviate from published specifications. Current characterized errata are documented in the AN430TX Motherboard Specification Update.

Revision History

Revision

-001

Revision History Date

First release of the AN430TX Motherboard Technical Product Specification. 4/97

This product specification applies only to standard AN430TX motherboards with BIOS identifier AN430TX0.86A.

Changes to this specification will be published in the AN430TX 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 AN430TX 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.

†

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

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.

Contents

1 Motherboard Description

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

1.2 Motherboard Manufacturing Options............................................................................9

1.3 Form Factor ...............................................................................................................10

1.4 I/O Shield...................................................................................................................11

1.5 Microprocessor...........................................................................................................12

1.5.1 Microprocessor Upgrade..............................................................................12

1.6 Memory......................................................................................................................13

1.6.1 Main Memory...............................................................................................13

1.6.2 Second Level Cache ...................................................................................14

1.7 Chipset.......................................................................................................................14

1.7.1 82439TX System Controller (MTXC) ...........................................................14

1.7.2 82371AB PCI ISA IDE Xcelerator (PIIX4) ....................................................15

1.7.3 Universal Serial Bus (USB) Support ............................................................16

1.7.4 IDE Support.................................................................................................16

1.8 Super I/O Controller ...................................................................................................17

1.8.1 Serial Ports..................................................................................................17

1.8.2 Parallel Port.................................................................................................18

1.8.3 Floppy Controller .........................................................................................18

1.8.4 Keyboard and Mouse Interface....................................................................18

1.8.5 Infrared Support...........................................................................................19

1.9 Graphics Subsystem..................................................................................................19

1.9.1 Graphics Controller......................................................................................19

1.9.2 VESA/ATI Multimedia Channel Connector ..................................................20

1.9.3 Brooktree Video Capture Processor ............................................................20

1.9.4 ImpacTV NTSC/PAL Encoder......................................................................21

1.10 Audio Subsystem.......................................................................................................22

1.10.1 Yamaha OPL4-ML.......................................................................................23

1.10.2 Audio Drivers and Utilities............................................................................23

1.10.3 Audio Connectors ........................................................................................23

1.10.4 CD-ROM audio connector............................................................................23

1.11 Motherboard Connectors ...........................................................................................24

1.11.1 Power Supply Connector .............................................................................29

1.11.2 Front panel Connectors ...............................................................................30

1.11.3 Back Panel Connectors ...............................................................................33

1.11.4 Optional TV/Video Riser Card Connectors ..................................................36

1.12 Add-in Board Expansion Connectors .........................................................................38

1.13 Jumper Settings.........................................................................................................41

1.13.1 Processor Configuration (J9C1-C, D) ..........................................................42

1.13.2 Password Clear (J9C1-A) ............................................................................43

1.13.3 Clear CMOS (J9C1-A).................................................................................43

1.13.4 BIOS Setup Access (J9C1-B)......................................................................43

1.13.5 BIOS Recovery (J8A1) ................................................................................43

1.13.6 Processor Voltage (J6M1) ...........................................................................43

iii

AN430TX Motherboard Technical Product Specification

1.14 Reliability....................................................................................................................43

1.15 Environmental............................................................................................................44

1.16 Power Consumption...................................................................................................44

1.16.1 Power Supply Considerations......................................................................45

1.17 Regulatory Compliance..............................................................................................45

1.17.1 Safety ..........................................................................................................45

1.17.2 EMI..............................................................................................................46

1.17.3 Product Certification Markings.....................................................................46

2 Motherboard Resources

2.1 Memory Map..............................................................................................................47

2.2 DMA Channels...........................................................................................................47

2.3 I/O Map......................................................................................................................48

2.4 PCI Configuration Space Map....................................................................................50

2.5 Interrupts....................................................................................................................50

2.6 PCI Interrupt Routing Map .........................................................................................51

3 BIOS and Setup Program

3.1 Introduction................................................................................................................53

3.1.1 BIOS Flash Memory Organization ...............................................................53

3.1.2 BIOS Upgrades ...........................................................................................54

3.1.3 Plug and Play: PCI Auto-configuration ........................................................54

3.1.4 PCI IDE Support ..........................................................................................54

3.1.5 ISA Plug and Play........................................................................................55

3.1.6 ISA Legacy Devices.....................................................................................55

3.1.7 Desktop Management Interface...................................................................55

3.1.8 Advanced Power Management....................................................................56

3.1.9 Language Support .......................................................................................56

3.1.10 Boot Options................................................................................................57

3.1.11 OEM Logo or Scan Area..............................................................................57

3.1.12 USB Support................................................................................................57

3.1.13 BIOS Setup Access Jumper ........................................................................57

3.1.14 Recovering BIOS Data ................................................................................58

3.2 BIOS Setup Program .................................................................................................58

3.2.1 Overview of the Setup Menu Screens .........................................................58

3.2.2 Main Menu...................................................................................................59

3.2.3 Primary/Secondary IDE Master/Slave Configuration Submenus .................61

3.2.4 Advanced Menu...........................................................................................63

3.2.5 Security Menu..............................................................................................67

3.2.6 Power Menu ................................................................................................68

3.2.7 Boot Menu ...................................................................................................68

3.2.8 Exit Menu.....................................................................................................70

4 Error Messages

4.1 BIOS Error Messages ................................................................................................71

4.2 Port 80h POST Codes ...............................................................................................72

5 Specifications and Online Support

5.1 Specifications.............................................................................................................79

5.2 Online Support...........................................................................................................80

Figures

1. Motherboard Components ...........................................................................................8

2. Motherboard Dimensions...........................................................................................10

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

4. Motherboard Connectors ...........................................................................................24

5. Front Panel I/O Connectors .......................................................................................30

6. Back Panel I/O Connectors........................................................................................33

7. TV/Video Riser Card Connectors...............................................................................36

8. Jumper Locations.......................................................................................................41

Tables

1. ATI-264GT Rage II+ Maximum Refresh Rates at Different Resolutions ....................20

2. Standard CD-ROM Audio Connector (J2G2) .............................................................25

3. Optional ATAPI Audio Connector (J2G1)...................................................................25

4. Line-In Audio Input Connector (J2H3)........................................................................25

5. Telephony Connector (J2H4).....................................................................................25

6. Serial Port 2 Header (J2J1)........................................................................................25

7. CPU Fan Connector (J6M2).......................................................................................26

8. Floppy Drive Connector (J7L2) ..................................................................................26

9. Optional Video Capture Input Connector (J7B1) ........................................................26

10. GPIO Header (J9A1)..................................................................................................27

11. PCI IDE Connectors (J9H1, J10H1)...........................................................................27

12. System Fan Connector (J10A1).................................................................................27

13. Optional VESA/ATI Multimedia Channel Connector (J5F1) .......................................28

14. Optional Video Riser Header (J3F1) ..........................................................................28

15. Power Supply Connector (J7L1) ................................................................................29

16. Front Panel I/O Connectors .......................................................................................31

17. PS/2 Keyboard and Mouse Connectors .....................................................................34

18. USB Connectors ........................................................................................................34

19. Parallel Port Connector..............................................................................................34

20. Serial Port Connector.................................................................................................34

21. Optional VGA Video Monitor Connector ....................................................................35

22. MIDI / Game Port Connector......................................................................................35

23. S-Video Out Connector..............................................................................................36

24. RCA Composite Video Out Connector .......................................................................36

25. S-Video In and I2C Connector...................................................................................37

26. RCA Composite Video In Connector..........................................................................37

27. PCI Bus Connectors ..................................................................................................38

28. ISA Bus Connectors...................................................................................................39

29. Jumper Settings.........................................................................................................42

30. Jumper Settings for Processor and Bus Frequencies ................................................42

31. Motherboard Environmental Specifications ................................................................44

32. DC Voltage.................................................................................................................44

33. Power Usage for a static Windows 95 Desktop .........................................................44

34. Memory Map..............................................................................................................47

Contents

AN430TX Motherboard Technical Product Specification

35. DMA Channels...........................................................................................................47

36. I/O Map......................................................................................................................48

37. PCI Configuration Space Map....................................................................................50

38. Interrupts....................................................................................................................50

39. PCI Interrupt Routing Map .........................................................................................51

40. Flash Memory Organization .......................................................................................53

41. Recommendations for Configuring an ATAPI Device.................................................55

42. Overview of the Setup Menu Screens........................................................................59

43. BIOS Error Messages ................................................................................................71

44. Port 80h Codes..........................................................................................................73

45. Compliance with Specifications..................................................................................79

1 Motherboard Description

1.1 Overview

The AN430TX motherboard supports Pentium processors and Pentium processors with MMX technology. The motherboard features:

• ATX form factor

• Socket 7 Pentium OverDrive

Main Memory

• Two 168-pin DIMM sockets

• Support for up to 256 MB of:  extended data out (EDO) memory  unbuffered 4-clock synchronous DRAM (SDRAM) memory

• Up to 64 MB of main memory cacheable

Second Level Cache Memory

• 512 KB pipeline burst static RAM (PBSRAM) soldered to the motherboard

Chipset and PCI/IDE Interface

• Intel 82430TX PCIset

• Integrated PCI bus mastering controller

• Two fast IDE interfaces

• Support for up to four IDE drives or devices

• Support for Ultra DMA/33 drives

• Support for LS-120 removable media IDE drives



processor socket

I/O Features

• PC87307VUL I/O controller

• Integrates standard I/O functions: floppy drive interface, one multimode parallel port, two

FIFO serial ports, keyboard and mouse controller, IrDA

• Support for two Universal Serial Bus (USB) interfaces

Expansion Slots

• Standard version (without video option):  Three PCI  Two ISA  One shared PCI/ISA

• With optional video subsystem:  Three PCI  Three ISA  Video riser (required for TV-out and/or video capture)

†

-compatible interface

AN430TX Motherboard Technical Product Specification

Audio Subsystem

• Yamaha OPL3-SA3 3-D audio codec soldered to the motherboard

• Yamaha OPL4-ML wavetable synthesizer soldered to the motherboard

Video Subsystem

• Optional ATI

†

-264GT Rage II+ 3-D graphics controller

• Optional Brooktree Bt829A video capture processor

• Optional ATI-ImpacTV

• Optional VESA

†

/ATI Multimedia Channel connector

†

NTSC/PAL TV-out encoder

Other features

• Plug and Play compatible

• Support for Advanced Power Management

Software drivers and utilities are available from Intel.

C FE

DBA

DD CC

BB AA

W T

U R

Sec.

Pri.

I J

K L

M N

O P

OM06169

Figure 1. Motherboard Components

Motherboard Description

A. Yamaha OPL3-SA3 audio codec S. Battery B. Yamaha OPL4-ML component T. Optional ATI-264GT Rage II+ graphics controller C. CD-ROM audio connector U. Optional Brooktree Bt829A video capture processor D. Line-in audio input connector V. Front panel header E. Telephony connector W. Onboard speaker F. Back panel I/O connectors X. GPIO header G. Serial port 2 header Y. System fan connector H. 512 KB PBSRAM cache Z. Configuration jumper block I. Socket 7 Pentium processor socket AA. Optional 2 MB of SGRAM video memory J. 82430TX MTXC system controller BB. BIOS recovery jumper K. Linear voltage regulator CC. 2 Mbit TSOP Flash memory device L. Processor voltage jumper DD. Optional Video capture input connector M. Fan connector EE. Optional ATI-ImpacTV NTSC/PAL TV-out device N. Power connector FF. Optional VESA/ATI Multimedia Channel connector O. Floppy drive connector GG. PCI connectors P. 82430TX PIIX4 PCI ISA IDE Xcelerator HH. DIMM sockets Q. PC87307VUL I/O controller II. Optional video riser card header R. IDE connectors JJ. ISA connectors

1.2 Motherboard Manufacturing Options

• ATI-264GT Rage II+ 3-D graphics controller with 2 MB of SGRAM

• Brooktree Bt829A video capture processor

• ATI-ImpacTV NTSC/PAL TV-out encoder

• VESA/ATI Multimedia Channel connector

• Unshrouded floppy disk and IDE controller connectors

AN430TX Motherboard Technical Product Specification

1.3 Form Factor

The motherboard is designed to fit into a standard ATX form factor chassis. Figure 2 illustrates the form factor for the motherboard. The location of the I/O connectors and mounting holes are in strict compliance with the ATX specification (see Section 5.1).

9.04

8.95

8.05

2.85

0.25

0.0

0.65

0.0

3.10

4.90

Figure 2. Motherboard Dimensions

11.35

11.10

OM06161

Motherboard Description

1.4 I/O Shield

The back panel I/O shield for the AN430TX motherboard must meet specific dimensional and material requirements. Computers based on this motherboard need the back panel I/O shield in order to pass certification testing. Figure 3 shows the critical dimensions for the I/O shield and indicates the position of each cutout. The example shown is chassis-specific and will not necessarily work with other chassis types.

4.610

1.590

0.295

1.955

0.133

0.597

0.200

0.478

1.407

0.458

0.768

1.158

0.671

0.395

0.553

0.990

1.911

2.184

3.327

4.735

4.899

0.193

Note: Material = 0.010 ±.0.001 Thick Stainless Steel, Half Hard

5.391

5.883

6.533

0.652

2.055

0.050

2.326

2.023

0.120

Left-end View

0.306 Dia (3)

0.666

OM05669

Figure 3. Back Panel I/O Shield Dimensions

AN430TX Motherboard Technical Product Specification

OM05908

1.5 Microprocessor

The motherboard supports:

• Pentium processors operating at 90, 100, 120, 133, 150, 166, and 200 MHz

• Pentium processors with MMX technology operating at 166, and 200 MHz

An onboard voltage regulator derives the necessary voltage from the computer’s power supply and enables use of standard or VRE-specified processors. The motherboard automatically detects the type of processor (Pentium processor or Pentium processor with MMX technology).

CAUTION

If you use clips to secure a heat sink to the processor, do not use bail-wire style heat sink clips, such as the type shown in the figure to the right. These clips have been known to damage the motherboard when installed or removed incorrectly.

1.5.1 Microprocessor Upgrade

The motherboard has a 321-pin Socket 7 zero insertion force (ZIF) microprocessor socket. Socket 7 supports upgrades to higher performance Pentium OverDrive processors not supported by Socket 5.

Motherboard Description

1.6 Memory

1.6.1 Main Memory

The motherboard has two 168-pin DIMM sockets. Memory can be installed in one or two sockets. Minimum memory size is 8 MB. Maximum memory size is 256 MB. The BIOS automatically detects memory type, size, and speed so no jumper settings are required.

The motherboard supports the following:

• 168-pin 3.3 V DIMMs with tin-plated contacts

• 60 and 66 MHz bus speeds

• 60 ns 3.3V EDO DRAM

• 60 ns unrestricted CAS Latency 2 unbuffered 4-clock 3.3V SDRAM

• Caching for the first 64 MB of main memory

• 64-bit data path

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

DIMM Size Type Configuration Technology

8 MB 60 ns EDO 1M x 64 16 Mbit 16 MB 60 ns EDO 2M x 64 16 Mbit 32 MB 60 ns EDO 4M x 64 16 Mbit 64 MB 60 ns EDO 8M x 64 16 Mbit 8 MB CAS Latency 2 SDRAM 1M x 64 16 Mbit 16 MB CAS Latency 2 SDRAM 2M x 64 16 Mbit 32 MB CAS Latency 2 SDRAM 4M x 64 16 Mbit 64 MB CAS Latency 2 SDRAM 8M x 64 64 Mbit 128 MB CAS Latency 2 SDRAM 16M x 64 64 Mbit

Memory type, size, and speed can vary between sockets, so EDO and SDRAM can be installed on the same motherboard. Parity (x 72) DIMMs can be installed but are not recommended for the following reasons:

• The motherboard does not provide parity checking or ECC

• Parity DIMMs cause excessive capacitive loading on memory data and address lines

1.6.1.1 EDO DRAM

EDO DRAM improves memory read performance by holding the memory data valid until the next CAS# falling edge, unlike fast page mode DRAM, which tri-states the memory data when CAS# negates to precharge for the next memory cycle. With EDO DRAM, the CAS# precharge overlaps the data-valid time, which allows CAS# to negate earlier while still satisfying the memory datavalid window.

AN430TX Motherboard Technical Product Specification

1.6.1.2 SDRAM

Synchronous DRAM (SDRAM) is designed to improve main memory performance. Unlike fast page or EDO DRAM, SDRAM 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. SDRAM DIMM should meet the Intel 4-clock 66 MHz 64-bit unbuffered SDRAM DIMM v1.0 specification.

CAUTION

The board does not support SDRAM DIMMs with an n x 4 DRAM base due to loading anomalies. For example, a DIMM that uses sixteen 16 Mbit x 4 devices should not be used.

NOTE

✏

The AN430TX supports unbuffered, 4-clock 3.3V SDRAM DIMMs only. Buffered, 5V, or 2-clock SDRAM DIMMs cannot be used.

1.6.2 Second Level Cache

The 512 KB direct-mapped write-back L2 cache consists of two 64K x 32 global write enable (GWE) pipeline burst asynchronous RAMs (PBSRAMs) and a 32K x 8 external tag SRAM. These devices are soldered to the motherboard.

1.7 Chipset

The Intel 82430TX PCIset consists of the 82439TX System Controller (MTXC) device and the 82371AB PCI ISA IDE Xcelerator (PIIX4) device.

1.7.1 82439TX System Controller (MTXC)

The MTXC integrates the cache and main memory DRAM control functions and provides bus control to handle transfers between the processor, cache, main memory, and the PCI bus. The MTXC allows PCI masters to achieve full PCI bandwidth by using the snoop ahead feature. For increased system performance the MTXC integrates posted write and read prefetch buffers. The MTXC comes in a 324-pin MBGA package that features:

• Microprocessor interface control

• Integrated L2 write-back cache controller  Supports pipeline burst SRAM  64 MB maximum DRAM cacheability  Direct mapped organization—write back only  Cache hit read/write cycle timings at 3-1-1-1  Back to back read/write cycles at 3-1-1-1-1-1-1-1

Motherboard Description

• Integrated DRAM controller  8 MB to 256 MB main memory  64-Mbit DRAM/SDRAM technology support  3.3V EDO and unbuffered synchronous DRAM support  Non-parity (x64) support only

• Fully synchronous minimum latency PCI bus interface  PCI compliance (see Section 5.1 for compliance level)  30 and 33 MHz bus speeds  PCI to DRAM data throughput at greater than 100 MB/sec  Up to four PCI masters in addition to the PIIX4

• Power management control  Provides PCI CLKRUN# signal to control memory clock on the PCI bus (on/off)  Internal clock control (gated off if no host or PCI bus activity)

1.7.2 82371AB PCI ISA IDE Xcelerator (PIIX4)

The Intel 82371AB PCI ISA IDE Xcelerator (PIIX4) is a multifunction PCI device implementing a PCI to ISA bridge, PCI IDE functionality, a 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 30 and 33 MHz  PCI compliant (see section 5.1 for compliance level)  Full ISA or extended I/O (EIO) bus support

• USB controller  Two USB ports (see section 5.1 for compliance level)  Supports legacy keyboard and mouse  Supports UHCI design guide revision 1.1 interface

• Integrated dual-channel enhanced IDE interface  Support for 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  Integrated 8 x 32-bit buffer for bus master PCI IDE burst transfers  Bus master mode

• 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  Support for 15 interrupts  Programmable for edge/level sensitivity

• Power management logic  Sleep/resume logic  Supports thermal alarm  Support for wake on modem through Ring Indicate input

AN430TX Motherboard Technical Product Specification

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

• 16-bit counters/timers based on 82C54

1.7.3 Universal Serial Bus (USB) Support

The motherboard features two USB ports. The ports permit the direct connection of two USB peripherals without an external hub. If more devices are required, an external hub can be connected to either of the built-in ports. The motherboard fully supports the standard universal host controller interface (UHCI) and uses standard software drivers that are UHCI-compatible. Features of the USB include:

• Self-identifying, hot pluggable peripherals

• Automatic mapping of function to driver and configuration

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

• Support for up to 127 physical devices

• Guaranteed bandwidth and low latencies appropriate for telephony, audio, and other

applications

• Error handling and fault recovery mechanisms built into protocol

NOTE

✏

Computers that have an unshielded cable attached to the USB port might not meet FCC Class B 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.

1.7.4 IDE Support

The motherboard has two independent bus mastering PCI IDE interfaces that support PIO Mode 3, PIO Mode 4, ATA-33 (Ultra DMA/33), and ATAPI (e.g., CD-ROM) devices. The BIOS supports Logical Block Addressing (LBA) and Extended Cylinder Head Sector (ECHS) translation modes. IDE device transfer rate and translation mode are automatically detected by the BIOS.

Normally, programmed I/O operations require a substantial amount of processor bandwidth; however, in true multi-tasking operating systems like Windows mastering IDE can be devoted to other tasks while disk transfers are occurring.

1.7.4.1 LS-120 Support

LS-120 MB Diskette technology enables users to store 120 MB of data on a single, 3.5-inch removable diskette. LS-120 technology is backward (both read and write) compatible with

1.44 MB and 720 KB DOS-formatted diskettes and is supported by Windows 95 and Windows

†

operating systems.

NT The AN430TX motherboard allows connection of an LS-120 compatible drive and a standard

3.5-inch diskette drive. The LS-120 drive can be configured as a boot device, if selected in the

BIOS setup utility.

†

95, the bandwidth freed by bus

Motherboard Description

NOTE

✏

If you connect an LS-120 drive to an IDE connector and configure it as the “A” drive and configure a standard 3.5-inch floppy as a “B” drive, the standard floppy must be connected to the floppy drive cable’s “A” connector (the connector at the end of the cable).

1.8 Super I/O Controller

The PC87307VUL Super I/O Controller from National Semiconductor is an ISA Plug and Play compatible (see section 5.1 for compliance level), multifunction I/O device that provides the following features:

• Serial ports:  Two 16450/16550A-software compatible UARTs  Send/receive 16-byte FIFO  Four 8-bit DMA options for the UART with Slow Infrared Support (USI)  Ring indicator support for both serial ports

• Multimode bidirectional parallel port  Standard mode, IBM  Enhanced Parallel Port (EPP) mode with BIOS and driver support  High-speed Extended Capabilities Port (ECP) mode

• Floppy disk controller  DP8473 and N82077 compatible  16 byte FIFO  PS/2  CMOS disk input and output logic  High performance digital data separator (DDS)  PC-AT

• Keyboard and mouse controller  Industry standard 8042A compatible  General purpose microcontroller  8 bit internal data bus

• Support for an IrDA and Consumer IR-compliant infrared interface

†

diagnostic register support

†

and PS/2 drive mode support

†

and Centronics† compatible

By default, the I/O controller interfaces are automatically configured during boot up. The I/O controller can also be manually configured in the Setup program.

1.8.1 Serial Ports

The motherboard has one 9-pin D-Sub serial port connector located on the back panel, and one keyed 10-pin header located on the motherboard for cabling to the back panel. The 16540 and 16550A compatible UARTs support data transfers at speeds up to 921.6 Kbits/sec, while the extended UART mode supports data rates up to 1.5 Mbits/sec.

AN430TX Motherboard Technical Product Specification

1.8.2 Parallel Port

The connector for the multimode bidirectional 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)

• Bidirectional (PS/2-compatible)

• Bidirectional Enhanced Parallel Port (EPP) (see Section 5.1 for EPP specification compliance

level)

• Bidirectional Extended Capabilities Port (ECP)

1.8.3 Floppy Controller

The I/O controller is software compatible with the DP8473 and N82077 floppy drive controllers and supports both PC-AT and PS/2 modes. In the Setup program, the floppy interface can be configured for the following floppy drive capacities and sizes:

• 360 KB, 5.25-inch

• 1.2 MB, 5.25-inch

• 720 KB, 3.5-inch

• 1.2 MB, 3.5-inch (driver required)

• 1.25/1.44 MB, 3.5-inch

• 2.88 MB, 3.5-inch

1.8.4 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

fuse, 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 the Phoenix keyboard and mouse controller 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 also supports the following hot-key sequences:

• <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

Motherboard Description

1.8.5 Infrared Support

The motherboard has a 6-pin header that supports Hewlett Packard† HSDL-1000 compatible infrared (IR) transmitters/receivers. In the Setup program, Serial Port 2 can be directed to a connected IR device. The connection can be used to transfer files to or from portable devices like laptops, PDAs and printers. The Infrared Data Association (IrDA) specification supports data transfers of 115 Kbits/sec at a distance of 1 meter. See section 5.1 for IrDA specification compliance level.

1.8.5.1 Consumer Infrared Support

The motherboard has a dedicated signal pin that supports Consumer Infrared (IR) devices (remote controls). The signal pin supports receive only. Consumer IR devices can be used to control telephony functions and multimedia operations like volume and CD track changes. In this mode, data rates of up to 685.57 Kbits/sec are supported. A software and hardware interface is needed to use this feature.

1.9 Graphics Subsystem

The optional onboard graphics subsystem features the ATI-264GT Rage II+ graphics controller.

1.9.1 Graphics Controller

The ATI-264GT Rage II+ provides the following features:

• Drawing coprocessor that operates concurrently with the host processor

• Optional video coprocessor that enables simultaneous display of 24 bits per pixel (bpp) video

and 8 bpp graphics

• VGA

• PCI compliant

• Support for power management

• Support for VESA Display Data Channel (DDC2B)

• Video scaler, color space converter, true color palette

• Triple-clock synthesizer

• Support for ATI multimedia feature connector

• 3-D graphics capability

• PCI bus master

1.9.1.1 Video Memory

The motherboard supports 2 MB of 66MHz (15 ns burst mode cycle time) SGRAM for video memory, soldered to the board. There are no upgrade options for video memory.

†

and VESA compatibility

AN430TX Motherboard Technical Product Specification

1.9.1.2 Resolutions and Refresh Rates

Table 1. ATI-264GT Rage II+ Maximum Refresh Rates at Different Resolutions

2 MB Memory Maximum Refresh Rate (Hz) At:

4-bit Color

Resolution

640 x 480 160 160 160 160 800 x 600 160 160 160 160 1024 x 768 160 160 160 not supported 1152 x 864 160 160 160 not supported 1280 x 1024 160 160 160 not supported

(16 Colors)

8-bit Color (256 Colors)

16-bit Color (64K Colors)

24-bit Color (16M Colors)

1.9.1.3 Graphics Drivers and Utilities

Graphics drivers and common graphics utilities are available for Windows 3.x, Windows 95, and Windows NT. Drivers and utilities are available from Intel’s World Wide Web site (see

Section 5.2).

1.9.2 VESA/ATI Multimedia Channel Connector

The motherboard has an optional 40-pin VESA/ATI Multimedia Channel connector that uses 26 pins for the VESA standard bus and 12 pins for the ATI Enhanced Visual Architecture bus. The connector features a shared frame buffer interface and a Local Peripheral Bus (LPB) with a bidirectional interface that supports video companion devices like MPEG/live video decoders.

1.9.3 Brooktree Video Capture Processor

The motherboard features an optional Brooktree Bt829A Video Capture Processor for digitizing analog NTSC/PAL/SECAM input signals from TV tuners, VCRs, cameras, and other sources of composite or Y/C video. The Bt829A has the mixed signal circuitry required to convert an analog composite signal into a scaled digital video stream supporting several video formats, resolutions and frame rates. The Bt829A features include:

• Single-chip composite/S-Video NTSC/PAL/SECAM to YCrCb digitizer

• Square pixel and CCIR601 resolution for NTSC, PAL, and SECAM

• Chroma comb filtering

• Horizontal and vertical filtered scaling

• Programmable hue, brightness, saturation, and contrast

• User-programmable cropping of the video window

• 2x oversampling

• Two-wire I

• 8- or 16-bit pixel interface

• Automatic NTSC/PAL format detection

• Automatic gain control

C bus interface

Motherboard Description

The motherboard provides two inputs for video on the video riser card I/O panel: an RCA input connector for composite video signals, and a 7-pin mini-DIN connector for S-Video signals and

Inter-Integrated Circuit (I

C) signals.

The Bt829A’s registers are accessed using the I device. To reprogram the default settings, you must connect an I

C/S-Video connector. The I2C serial clock and data lines transfer data from the master device at

C interface. The Bt829A operates as an I2C slave

C master to the 7-pin mini-DIN

a rate of 100 Kbits/sec.

1.9.3.1 Video Capture Input Connector

A 1x4 pin connector is available on the motherboard for applying a composite video signal (from a TV Tuner add-in card, for example) to the input of the Brooktree Bt829A Video Capture device.

Two pins are dedicated to external control capability via the I

C protocol using serial clock (SCL)

and serial data (SDA) pins.

1.9.3.2 Video Capture Drivers and Utilities

Video capture software and utilities are available from Intel’s World Wide Web site (see Section 5.2).

1.9.4 ImpacTV NTSC/PAL Encoder

The optional ATI-ImpacTV NTSC/PAL Encoder is an ASIC that provides a TV-out interface for the ATI-264GTB 3D Rage II+ multimedia graphics accelerators. Quality issues such as image flicker, illegible text and low-definition graphics are controlled through on-chip circuitry for scaling, flicker removal, and artifact suppression. Features include:

• Circuitry for producing interlaced images with flicker removed

• Circuitry for eliminating dot crawl

• Filters for bringing out detail in fine text while suppressing color artifacts

• Support for both NTSC and PAL formats

• Filters that ensure signal bandwidth does not exceed TV standards

• Fully programmable timing that enables NTSC or PAL signals to be generated from monitor

resolutions that include 320x200, 320x240, 320x350, 320x400, 360x200, 360x240, 360x400, 360x440, 512x384, 640x350, 640x400, 640x480, 720x350, 720x400, 720x480, and 800x600

• Simultaneous display of images on both a TV and a PC monitor

• Independent horizontal positioning of the TV image and the PC monitor image

• Independent vertical positioning of the TV image and the PC monitor image

• Independent horizontal scaling of the TV image and the PC monitor image

• Power management for full VESA DPMS and EPA Energy Star compliance

• Automatic power down of the ASIC at initialization if a TV is not detected

• Support for both composite and S-Video connectors

The motherboard provides two outputs for video on the video riser card I/O panel: an RCA connector for composite video-out signals and a 4-pin mini-DIN connector for S-Video output signals.

AN430TX Motherboard Technical Product Specification

NOTE

✏

A video riser card is required for TV outputs and video capture inputs (shown in Figure 7).

1.10 Audio Subsystem

The onboard audio subsystem features the Yamaha OPL† YMF715, a 100-pin SQFP audio chip. It integrates a 16-bit audio codec, OPL3 FM synthesis and its DAC, 3-D enhanced stereo controller, and an interface for MPU-401 and a joystick. The YMF715 provides all the digital audio and analog mixing functions needed for recording and playing sound on personal computers. It features the following:

• Integrated 3-D enhanced stereo controller including all required analog components

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

• Analog mixing, anti-aliasing, and reconstruction filters

• Support for 16-bit address decode

• Line, microphone, mono, and modem inputs

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

• Full digital control of all mixer and volume control functions

• Software switching between rear panel Mic In and Line In connectors

• Plug and Play compatibility

• Sound Blaster

• Pin compatible with the Yamaha YMF711

†

and Windows Sound System compatibility

The following table shows the IRQ, DMA channel, and base I/O address options for the audio subsystem. These options are automatically chosen by the Plug and Play interface, so there are no default settings.

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)

5 7 9 10 11

DMA Channel (Options)

0 1 3

I/O Address (Options)

220h 240h 220-280h

530h E80h 530-F48h

330h 300h 300-334h

201-211h 388h

388-3F8h

Motherboard Description

1.10.1 Yamaha OPL4-ML

The Yamaha OPL4-ML wavetable is a ROM table containing live instrument sound samples. Wave synthesis results in richer and more realistic sounds then that of FM synthesis.

1.10.2 Audio Drivers and Utilities

Audio software and utilities are available from Intel’s World Wide Web site (see Section 5.2).

1.10.3 Audio Connectors

The board has these audio connectors:

• Back panel audio jacks (Line In, Line Out, Mic In)

• CD-ROM audio connector (either standard CD or optional ATAPI styles provided)

• Telephony connector (ATAPI style only)

• Line-in audio input connector (ATAPI style only)

1.10.4 CD-ROM audio connector

A 1 x 4-pin connector is available for connecting the audio output of an internal CD-ROM connector to the audio subsystem’s mixer. The connector is compatible with most cables supplied with ATAPI CD-ROM headers designed to connect to audio add-in cards.

AN430TX Motherboard Technical Product Specification

1.11 Motherboard Connectors

Figure 4 shows the connectors on the motherboard.

Video

Riser

(Optional)



VESA/ATI

Multimedia

Channel

(Optional)

25 27

J3F1

J5F1

Connectors(4)

J4C1, J4D1

J4E1, J4E2

ISA

Connectors(3)

J4A1, J4B1 J4B2

PCI

J2G2

CD-ROM Audio

J2G1

ATAPI

Audio

(Optional)

Sec. Pri.

J2H3

Line-in

Audio

J2H4

Serial Port 2

CPU Fan

J6M2

Telephony

1 2

J2J1

J7L1

Power

J10A1

Chassis

Fan

J9A1

GPIO

J7B1

Video

Capture

Input

(Optional)

J9H1

J10H1

IDE(2)

Secondary

Primary

J7L2

234

1335

Floppy Drive

OM06165

Figure 4. Motherboard Connectors

Table 2. Standard CD-ROM Audio

Connector (J2G2)

Pin Signal Name

1 Ground 2 CD audio left channel 3 Ground 4 CD audio right channel

Table 3. Optional ATAPI Audio Connector

(J2G1)

Pin Signal Name

1 CD audio left channel 2 Ground 3 Ground 4 CD audio right channel

Motherboard Description

Table 4. Line-In Audio Input Connector

(J2H3)

Pin Signal Name

1 Left channel audio in 2 Ground 3 Ground 4 Right channel audio in

Table 5. Telephony Connector (J2H4)

Pin Signal Name

1 Mono output 2 Ground 3 Ground 4 MIC input

Table 6. Serial Port 2 Header (J2J1)

Pin Signal Name Pin Signal Name

1 DCD# 2 DSR# 3 Serial In 4 RTS# 5 Serial Out 6 CTS# 7 DTR# 8 RI# 9 Ground 10 Key

AN430TX Motherboard Technical Product Specification

Table 7. CPU Fan Connector (J6M2)

Pin Signal Name

1 Ground 2 +12 V 3 No connect

Table 8. Floppy Drive Connector (J7L2)

Pin Signal Name Pin Signal Name

1 Ground 2 DENSEL 3 Ground 4 Reserved 5 Key 6 FDEDIN# 7 Ground 8 FDINDX# (Index) 9 Ground 10 FDM00# (Motor enable A) 11 Ground 12 FDDS1# (Drive select B) 13 Ground 14 FDDS0# (Drive select A) 15 Ground 16 FDM01# (Motor enable B) 17 MSEN1 18 FDDIR# 19 Ground 20 FDSTEP# 21 Ground 22 FDWD# (Write data) 23 Ground 24 FDWE# (Write gate) 25 Ground 26 FDTRK0# (Track 0) 27 MSEN0 28 FDWPD# (Write protect) 29 Ground 30 FDRDATA# (Read data) 31 Ground 32 FDHEAD# (Side 1 select) 33 Ground 34 DSKCHG# (Diskette change)

Table 9. Optional Video Capture Input

Connector (J7B1)

Pin Signal Name

1 Composite Video In 2 Ground 3 SCL 4 SDA

Motherboard Description

Table 10. GPIO Header (J9A1)

Pin Signal Name

1 No connect 2 Key 3 GPIO1_7 4 Ground 5 GPIO1_2 6 Ground 7 GPIO1_1 8 Ground

Table 11. PCI IDE Connectors (J9H1, J10H1)

Pin Signal Name Pin Signal Name

1 Reset IDE 2 Ground 3 Host data 7 4 Host data 8 5 Host data 6 6 Host data 9 7 Host data 5 8 Host data 10 9 Host data 4 10 Host data 11 11 Host data 3 12 Host data 12 13 Host data 2 14 Host data 13 15 Host data 1 16 Host data 14 17 Host data 0 18 Host data 15 19 Ground 20 Key 21 DDRQ0 [DDRQ1] 22 Ground 23 I/O write# 24 Ground 25 I/O read# 26 Ground 27 IOCHRDY 28 Vcc pull-up 29 DDACK0# [DDACK1#] 30 Ground 31 IRQ 14 [IRQ 15] 32 Reserved 33 Address 1 34 Reserved 35 Address 0 36 Address 2 37 Chip select 1P# [Chip select 1S#] 38 Chip Select 3P# [Chip select 3S#] 39 Activity# 40 Ground

NOTE: Signal names in brackets ([ ]) are for the secondary IDE connector

Table 12. System Fan Connector (J10A1)

Pin Signal Name

1 Ground 2 +12 V 3 Ground

AN430TX Motherboard Technical Product Specification

Table 13. Optional VESA/ATI Multimedia Channel Connector (J5F1)

Pin Signal Name Pin Signal Name

1 Ground 2 Data 0 3 Ground 4 Data 1 5 Ground 6 Data 2 7 Data enable 8 Data 3 9 Sync enable 10 Data 4 11 PCLK enable 12 Data 5 13 SDA 14 Data 6 15 Ground 16 Data 7 17 Ground 18 DCLK 19 Ground 20 BLANK 21 VFCSNS 22 HSYNC 23 SCL 24 VSYNC 25 Key 26 Ground 27 Key 28 Key 29 VCC 30 SA 31 RST 32 SNRDY 33 SAD 34 VMASK 35 No connect 36 AMCREV 37 Ground 38 +12 V 39 No connect 40 No connect

Table 14. Optional Video Riser Header (J3F1)

Pin Signal Name Pin Signal Name

1NC 2NC 3 Ground 4 Composite in 5 Ground 6 Y in 7 Ground 8 SCL 9 Ground 10 SDA 11 Ground 12 C-In 13 Ground 14 +12 V 15 Ground 16 Composite out 17 Ground 18 Luma out 19 Ground 20 Chroma out 21 Ground 22 +5 V 23 NC 24 NC (Reserved)

Motherboard Description

1.11.1 Power Supply Connector

When used with a power supply that supports remote power on/off, the motherboard can turn off

the computer’s power through software control. Pin 14 of the power supply connector lets the motherboard recognize a power supply that supports this “soft-off” feature; the power supply must tie pin 14 to ground.

When the BIOS receives the correct APM command from the operating system, the BIOS turns off power to the computer. For example, in the Windows 95 Start menu, the user selects Shutdown to turn off the power.

If power to the computer is interrupted by a power outage or a disconnected power cord, when power resumes, the computer remains in the off state until the power on switch is pressed.

Table 15. Power Supply Connector (J7L1)

Pin Signal Name Pin Signal Name

1 +3.3 V 11 +3.3 V 2 +3.3 V 12 -12 V 3 Ground 13 Ground 4 +5 V 14 PS-ON# (Power Supply Remote

On/Off Control) 5 Ground 15 Ground 6 +5 V 16 Ground 7 Ground 17 Ground 8 PWRGD (Power Good) 18 -5 V 9 +5 VSB (Standby for real-time clock) 19 +5 V 10 +12 V 20 +5 V

AN430TX Motherboard Technical Product Specification

1.11.2 Front panel Connectors

The front panel connector includes headers for these I/O connections:

• Speaker

• Reset switch

• Power LED

• Hard drive activity LED

• Infrared (IrDA) port

• Sleep switch

• Power switch

Speaker Reset Pwr LED HD LED Infrared Sleep Pwr On

27 1

OM06166

Figure 5. Front Panel I/O Connectors

Table 16. Front Panel I/O Connectors

Pin Signal Name Connector

1 SW_ON# Power On 2 Ground

3 SLEEP Sleep/Resume 4 SLEEP_PU (pullup)

5 No connect none 6 +5 V IrDA

7 Key 8 IrRX 9 Ground 10 IrTX 11 CONIR (Consumer IR)

12 No connect none 13 HD_PWR +5 V HD LED

14 Key 15 HD Active# 16 HD_PWR

17 No connect/Key none 18 Ground Sleep/Power LED

19 Key 20 PWR_LED

21 No connect/Key none 22 Ground Reset 23 SW_RST 24 Ground Speaker

25 Key 26 PIEZO_IN 27 SPKR_HDR

Motherboard Description

1.11.2.1 Sleep/Resume

When advanced power management (APM) is enabled in the BIOS and the operating system’s APM driver is loaded, the computer can enter Sleep (Standby) mode in one of two ways:

• Pressing the optional front panel Sleep/Resume button

• Prolonged inactivity; the timeout period is adjustable in the Setup program

A sleep/resume button is supported by the 2-pin header located on the front panel I/O connector. The front panel sleep/resume switch must be a momentary SPST type that is normally open.

AN430TX Motherboard Technical Product Specification

Closing the sleep/resume switch generates a system management interrupt (SMI) to the processor, which immediately goes into system management mode (SMM). While the computer is in sleep mode it is fully capable of responding to and servicing external interrupts (such as an incoming fax) even though the monitor turns on only if a keyboard or mouse interrupt occurs. To reactivate the computer, or resume, you must press the sleep/resume button again, or use the keyboard or mouse.

1.11.2.2 Infrared connector

Serial Port 2 can be configured to support an IrDA module connected to this 6-pin header. After configuring the IrDA interface, you can transfer files to or from portable devices such as laptops, PDAs, and printers using application software.

1.11.2.3 Hard Drive (HD) LED

You can connect this header to an LED to provide a visual indicator that data is being read from or written to an IDE hard drive. For the LED to function properly, the IDE drive must be connected to the onboard IDE controller on the motherboard.

1.11.2.4 Sleep/Power LED

You can connect this header to an LED that will light when the computer is powered on. This LED will also blink when the computer is in a power-managed state.

1.11.2.5 Reset

You can connect this header to a momentary SPST type switch that is normally open. When the switch is closed, the board resets and runs the POST.

1.11.2.6 Speaker

A speaker may be installed on the motherboard as a manufacturing option. The speaker option includes a jumper on pins 26-27 of the front panel connector. You can disable the onboard speaker by removing the jumper, and you can connect an offboard speaker in its place. The speaker (onboard or offboard) provides error beep code information during the Power-On Self Test (POST) in the event that the computer cannot use the video interface. The speaker is not connected to the audio subsystem, and does not receive output from the audio subsystem.

1.11.3 Back Panel Connectors

Figure 6 shows the location of the back panel I/O connectors, which include:

• PS/2-style keyboard and mouse connectors

• Two USB connectors

• One parallel port

• One serial port

• Optional video monitor connector

• MIDI/game port

• External audio jacks: Line Out, Line In and Mic In

Motherboard Description

Keyboard

USB 1

Mouse Serial Port 1

USB 0

Figure 6. Back Panel I/O Connectors

Parallel Port

Video

(Optional)

MIDI/Game Port

Line Out Mic In

Line In

OM06167

AN430TX Motherboard Technical Product Specification

Table 17. PS/2 Keyboard and Mouse

Connectors

Pin Signal Name

1 Data 2 No connect 3 Ground 4 +5 V (fused) 5 Clock 6 No connect

Table 18. USB Connectors

Pin Signal Name

1 Power 2 USBP0# [USBP1#] 3 USBP0 [USBP1] 4 Ground

Table 19. Parallel Port Connector

Pin Signal Name Pin Signal Name

1 Strobe# 14 Auto Feed# 2 Data bit 0 15 Fault# 3 Data bit 1 16 INIT# 4 Data bit 2 17 SLCT IN# 5 Data bit 3 18 Ground 6 Data bit 4 19 Ground 7 Data bit 5 20 Ground 8 Data bit 6 21 Ground 9 Data bit 7 22 Ground 10 ACK# 23 Ground 11 Busy 24 Ground 12 Error 25 Ground 13 Select

Table 20. Serial Port Connector

Pin Signal Name Pin Signal Name

1 DCD# 6 DSR# 2 Serial In 7 RTS# 3 Serial Out 8 CTS# 4 DTR# 9 RI# 5 Ground

Table 21. Optional VGA Video Monitor Connector

Pin Signal Name Pin Signal Name

1 Red 9 +5 V fused 2 Green 10 Ground 3 Blue 11 No connect 4 No connect 12 Monitor ID 1 5 Ground 13 Horizontal Sync 6 Ground 14 Vertical Sync 7 Ground 15 Monitor ID 2 8 Ground

Table 22. MIDI / Game Port Connector

Pin Signal Name Pin Signal Name

1 Power 9 Power 2 Joystick button 0 10 Joystick button 2 3 Joystick X1 11 Joystick X2 4 Ground 12 MIDI out 5 Ground 13 Joystick Y2 6 Joystick Y1 14 Joystick button 3 7 Joystick button 1 15 MIDI in 8 Power

Motherboard Description

AN430TX Motherboard Technical Product Specification

OM05670

S-Video Input

Composite Video Output

Composite Video Input

S-Video Output

1.11.4 Optional TV/Video Riser Card Connectors

Figure 7 shows the location of the connectors on the TV/video riser card, which include:

• S-Video input and output jacks

• RCA composite video input and output jacks

Figure 7. TV/Video Riser Card Connectors

Table 23. S-Video Out Connector

Pin Signal Name

1 Ground 2 Ground 3 Y (LUMA Out) 4 C (CHROMA Out)

Table 24. RCA Composite Video Out Connector

Pin Signal Name

1 (Sleeve) Ground 2 (Tip) COMPOUT

Motherboard Description

34567

Table 25. S-Video In and I2C Connector

Pin Signal Name

1 Ground 2 Ground 3 Y (LUMA In) 4 C (CHROMA In) 5 IICCLK (I2C bus clock)

6 +12 V (fused) 7 IICDAT (I2C bus data)

Table 26. RCA Composite Video In

Connector

Pin Signal Name

1 (Sleeve) Ground 2 (Tip) COMPIN

AN430TX Motherboard Technical Product Specification

1.12 Add-in Board Expansion Connectors

The motherboard contains three PCI slots, two ISA slots and one shared slot (for a PCI or ISA card). The PCI bus supports up to four bus masters through the four PCI connectors (see Section 5.1 for information about compliance with the PCI specification).

Table 27. PCI Bus Connectors

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

A1 +5 V (TRST#)* B1 -12 V A32 AD16 B32 AD17 A2 +12 V B2 Ground (TCK)* A33 +3.3 V B33 C/BE2# A3 +5 V (TMS)* B3 Ground A34 FRAME# B34 Ground A4 +5 V (TDI)* B4 no connect (TDO)* A35 Ground B35 IRDY# A5 +5 V B5 +5 V A36 TRDY# B36 +3.3 V A6 INTA# B6 +5 V A37 Ground B37 DEVSEL# A7 INTC# B7 INTB# A38 STOP# B38 Ground A8 +5 V B8 INTD# A39 +3.3 V B39 LOCK# A9 Reserved B9 PRSNT1# A40 SDONE B40 PERR# A10 +5 V (I/O) B10 Reserved A41 SBO# B41 +3.3 V A11 Reserved B11 PRSNT2# A42 Ground B42 SERR# A12 Ground B12 Ground A43 PAR B43 +3.3 V A13 Ground B13 Ground A44 AD15 B44 C/BE1# A14 Reserved B14 Reserved A45 +3.3 V B45 AD14 A15 RST# B15 Ground A46 AD13 B46 Ground A16 +5 V (I/O) B16 CLK A47 AD11 B47 AD12 A17 GNT# B17 Ground A48 Ground B48 AD10 A18 Ground B18 REQ# A49 AD09 B49 Ground A19 Reserved B19 +5 V (I/O) A50 Key B50 Key A20 AD30 B20 AD31 A51 Key B51 Key A21 +3.3 V B21 AD29 A52 C/BE0# B52 AD08 A22 AD28 B22 Ground A53 +3.3 V B53 AD07 A23 AD26 B23 AD27 A54 AD06 B54 +3.3 V A24 Ground B24 AD25 A55 AD04 B55 AD05 A25 AD24 B25 +3.3 V A56 Ground B56 AD03 A26 IDSEL B26 C/BE3# A57 AD02 B57 Ground A27 +3.3 V B27 AD23 A58 AD00 B58 AD01 A28 AD22 B28 Ground A59 +5 V (I/O) B59 +5 V (I/O) A29 AD20 B29 AD21 A60 REQ64C# B60 ACK64C# A30 Ground B30 AD19 A61 +5 V B61 +5 V A31 AD18 B31 +3.3 V A62 +5 V B62 +5 V

* These signals (in parentheses) are optional in the PCI specification and are not implemented on this motherboard

Motherboard Description

Table 28. ISA Bus Connectors

Pin Signal Name Pin Signal Name

B1 Ground A1 IOCHK# (IOCHCK#) B2 RESET (RESDRV) A2 SD7 B3 +5 V A3 SD6 B4 IRQ9 A4 SD5 B5 -5 V A5 SD4 B6 DRQ2 A6 SD3 B7 -12 V A7 SD2 B8 SRDY# (NOWS#) A8 SD1 B9 +12 V A9 SD0 B10 Ground A10 IOCHRDY (CHRDY) B11 SMEMW# (SMWTC#) A11 AEN B12 SMEMR# (SMRDC#) A12 SA19 B13 IOW# (IOWC#) A13 SA18 B14 IOR# (IORC#) A14 SA17 B15 DACK3# A15 SA16 B16 DRQ3 A16 SA15 B17 DACK1# A17 SA14 B18 DRQ1 A18 SA13 B19 REFRESH# A19 SA12 B20 BCLK A20 SA11 B21 IRQ7 A21 SA10 B22 IRQ6 A22 SA9 B23 IRQ5 A23 SA8 B24 IRQ4 A24 SA7 B25 IRQ3 A25 SA6 B26 DACK2# A26 SA5 B27 TC A27 SA4 B28 BALE A28 SA3 B29 +5 V A29 SA2 B30 OSC A30 SA1 B31 Ground A31 SA0 Key Key D1 MEMCS16# (M16#) C1 SBHE# D2 IOCS16# (IO16#) C2 LA23 D3 IRQ10 C3 LA22

Note: Items in parentheses are alternate versions of signal names

continued ☛

AN430TX Motherboard Technical Product Specification

Table 28. ISA Bus Connectors (continued)

Pin Signal Name Pin Signal Name

D4 IRQ11 C4 LA21 D5 IRQ12 C5 LA20 D6 IRQ15 C6 LA19 D7 IRQ14 C7 LA18 D8 DACK0# C8 LA17 D9 DRQ0 C9 MEMR# (MRDC#) D10 DACK5# C10 MEMW# (MWTC#) D11 DRQ5 C11 SD8 D12 DACK6# C12 SD9 D13 DRQ6 C13 SD10 D14 DACK7# C14 SD11 D15 DRQ7 C15 SD12 D16 +5 V C16 SD13 D17 Master16# (MASTER#) C17 SD14 D18 Ground C18 SD15

Note: Items in parentheses are alternate versions of signal names

1.13 Jumper Settings

Figure 8 shows the location of jumper blocks on the motherboard.

J8A1

Normal/

Recovery

Motherboard Description

J6M1

STD/ VRE

A B C D

465

J9C1

321

OM06168

Figure 8. Jumper Locations

CAUTION

Do not move any of the jumpers with the power on. Always turn off the power and unplug the power cord from the computer before changing jumpers.

AN430TX Motherboard Technical Product Specification

Table 29. Jumper Settings

Function Jumper Configuration

Processor Voltage J6M1 1-2 Standard voltage

Password J9C1-A 1-2 Password enabled (Default)

CMOS (NVRAM and ESCD) Clear J9C1-A 4-5 Keep (Default)

BIOS Setup Access J9C1-B 1-2 Access enabled (Default)

Reserved J9C1-B 4-5 (Reserved)

Host Bus Frequency* J9C1-C See Table 30 Processor Frequency J9C1-D See Table 30 BIOS recovery J8A1 1-2 Normal (Default)

* These jumpers also set the PCI and ISA bus frequencies

2-3 VRE voltage (Default)

2-3 Password clear/disabled

5-6 Clear

2-3 Access denied

5-6 (Reserved)

2-3 Recovery

1.13.1 Processor Configuration (J9C1-C, D)

The motherboard must be configured for the frequency of the installed processor. Table 30 shows the jumper settings for each frequency and the corresponding host bus, PCI bus, and ISA bus frequencies.

Table 30. Jumper Settings for Processor and Bus Frequencies

Processor Freq. (MHz)

200 5-6 1-2 and 5-6 66 33 8.33 3 166 5-6 2-3 and 5-6 66 33 8.33 2.5 150 4-5 2-3 and 5-6 60 30 7.5 2.5 133 5-6 2-3 and 4-5 66 33 8.33 2 120 4-5 2-3 and 4-5 60 30 7.5 2 100 5-6 1-2 and 4-5 66 33 8.33 1.5 90 4-5 1-2 and 4-5 60 30 7.5 1.5

NOTE

✏

There are no separate or additional jumpering requirements for Pentium processors with MMX technology.

Jumpers J9C1-C

Jumpers J9C1-D

Host Bus Freq. (MHz)

PCI Bus Freq. (MHz)

ISA Bus Freq. (MHz)

Bus/Processor Freq. Ratio

Motherboard Description

1.13.2 Password Clear (J9C1-A)

Use this jumper to clear the password if the password is forgotten. The default setting is pins 1-2 (password enabled). To clear the password, turn off the computer, move the jumper to pins 2-3, and turn on the computer. Then, turn off the computer and return the jumper to pins 1-2 to restore normal operation. If the jumper is in the 2-3 position (password disabled), you cannot set a password.

1.13.3 Clear CMOS (J9C1-A)

This jumper resets the CMOS settings to the default values. This procedure must be done each time the BIOS is updated. The default setting for this jumper is pins 4-5 (keep CMOS settings). To reset the CMOS settings to the default values, turn off the computer, move the jumper to pins 5-6, then turn on the computer. When the computer displays the message “NVRAM cleared

by jumper,” turn off the computer and return the jumper to pins 4-5 to restore normal operation.

1.13.4 BIOS Setup Access (J9C1-B)

This jumper enables or disables access to the Setup program. The default setting is pins 1-2 (access enabled). To disable access to the Setup program, move the jumper to pins 2-3.

1.13.5 BIOS Recovery (J8A1)

This jumper lets you recover the BIOS data from a diskette in the event of a catastrophic failure. The default setting is pins 1-2 (normal operation). To recover the BIOS, turn off the computer, move the jumper to pins 2-3, then turn on the computer to perform BIOS recovery. After recovery, turn off the computer and return the jumper to pins 1-2 to restore normal operation. See Section 3.1.12 for more details.

1.13.6 Processor Voltage (J6M1)

This jumper sets the output of the onboard voltage regulator. For processors that require Standard voltage, place the jumper on pins 1-2. For processors that require VRE voltage, place the jumper on pins 2-3. Voltage specifications are as follow:

• Standard = 3.3 - 3.465 V

• VRE = 3.465 - 3.63 V

CAUTION

When installing a processor in the motherboard for the first time or upgrading to a new processor, check the processor’s documentation for the correct voltage setting. Operating the processor at the wrong voltage can cause unreliable performance.

1.14 Reliability

The Mean-Time-Between-Failures (MTBF) data is calculated from predicted data at 55 oC. Motherboard MTBF: 69,416 hours

AN430TX Motherboard Technical Product Specification

1.15 Environmental

Table 31. Motherboard Environmental Specifications

Parameter Specification Temperature

Non-Operating -40 oC to +70 oC Operating 0 oC to +55 oC

Vibration

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

20 Hz to 500 Hz : 0.02g² Hz (flat)

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

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

1.16 Power Consumption

Tables 32 and 33 list voltage and current specifications for a computer that contains the motherboard, a 200 MHz Pentium processor with MMX technology, 32 MB SDRAM, 256 KB cache, 2 MB SGRAM graphics memory, a 3.5-inch floppy drive, a 1.6 GB hard drive, an 8X IDE CD-ROM, and a 28.8 Kbps ISA faxmodem. This information is preliminary and is provided only as a guide for calculating approximate power usage with additional resources added.

NOTE

✏

AC power measurements include all peripheral components mentioned above. DC current measurements include only the motherboard components.

Table 32. DC Voltage

DC Voltage Acceptable Tolerance

+3.3 V ± 5% +5 V ± 5%

-5 V ± 5% +12 V ± 5%

-12 V ± 5%

Table 33. Power Usage for a static Windows 95 Desktop

APM Mode System AC (watts) Motherboard DC (amps)

APM disabled in BIOS 58 0.9 5.0 0.01 0.16 0.03 Maximum power savings 28 0.6 2.0 0.01 0.13 0.03

+3.3 V +5 V -5 V +12 V -12 V

Motherboard Description

1.16.1 Power Supply Considerations

The motherboard is designed to operate with at least a 200 W ATX power supply for typical configurations or a higher wattage supply for heavily loaded configurations. The power supply must meet the following requirements:

• Rise time for power supply: 2 ms to 20 ms

• Minimum delay for Reset to Power Good: 100 ms

• Minimum Powerdown warning: 1 ms

• 3.3 V output must reach its minimum regulation level within ± 20 ms of the 5V output

reaching its minimum regulation level

1.17 Regulatory Compliance

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

1.17.1 Safety

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

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

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

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

1.17.1.3 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)

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

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

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

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

AN430TX Motherboard Technical Product Specification

1.17.2 EMI

1.17.2.1 FCC Class B

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

1.17.2.2 CISPR 22, 2nd Edition, 1993

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

1.17.2.3 EN 55 022, 1995

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

1.17.2.4 EN 50 082-1 (1992)

Generic Immunity Standard; Currently compliance is determined via testing to IEC 801-2, -3 and

-4. (Europe)

1.17.2.5 VCCI Class 2 (ITE)

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

1.17.2.6 ICES-003, Issue 2

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

1.17.3 Product Certification Markings

This printed circuit assembly has the following product certification markings:

• European CE Marking: Consists of a marking on the board or 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 34. Memory Map

Address Range (decimal)

1024 K - 262144 K 100000 - 10000000 255 MB Extended Memory 960 K - 1024 K F0000 - FFFFF 64 K BIOS 944 K - 960 K EC000 - EFFFF 16 K Boot Block (available as UMB) 936 K - 944 K EA000 - EBFFF 8 K ESCD (Plug and Play configuration and

932 K - 936 K E9000 - E9FFF 4 K Reserved for BIOS 928 K - 932 K E8000 - E8FFF 4 K OEM Logo or Scan User Flash 896 K - 928 K E0000 - E7FFF 32 K POST BIOS (available as UMB) 800 - 896 K C8000 - DFFFF 96 K Available High DOS memory (open to ISA

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

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

2.2 DMA Channels

Table 35. DMA Channels

Address Range (hex) Size Description

DMI)

and PCI bus)

manager software)

DMA Channel Number Data Width 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 ECP parallel port / Audio 4 Reserved - Cascade Channel 5 16-bits Open 6 16-bits Open 7 16-bits Open

AN430TX Motherboard Technical Product Specification

2.3 I/O Map

Table 36. 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 Super 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 - Board Configuration 0079 1 byte Reserved - Board Configuration 0081 - 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 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 0377, bits 6:0 7 bits Secondary IDE Channel Status Port 0378 - 037F 8 bytes LPT1 0388- 038D 6 bytes AdLib (FM synthesizer)

continued ☛

Table 36. I/O Map (continued)

Address (hex) Size Description

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-SA 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 Dynamically

allocated in PCI I/O space

* DWORD access only ** Byte access only

32 bytes USB

Motherboard Resources

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 addin cards in the computer.

AN430TX Motherboard Technical Product Specification

2.4 PCI Configuration Space Map

Table 37. PCI Configuration Space Map

Bus Number (hex)

00 00 00 Intel 82430TX (MTXC) 00 07 00 Intel 82430TX (PIIX4 ) PCI/ISA bridge, function 0 00 07 01 Intel 82430TX (PIIX4 ) IDE Bus Master, function 1 00 07 02 Intel 82430TX (PIIX4 ) USB, function 2 00 07 03 Intel 82430TX (PIIX4) Power Management, function 3 00 08 00 ATI VGA Graphics 00 0D 00 PCI Expansion Slot #1 (J4E2) 00 0E 00 PCI Expansion Slot #2 (J4E1) 00 0F 00 PCI Expansion Slot #3 (J4D1) 00 10 00 PCI Expansion Slot #4 (J4C1)

Device Number (hex)

2.5 Interrupts

Table 38. 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 / USB 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)

* Default, but can be changed to another IRQ

Function Number (hex) Description

Motherboard Resources

2.6 PCI Interrupt Routing Map

The PCI specification allows for sharing of interrupts between devices attached to the PCI bus. In most cases, the small amount of latency added by interrupt sharing does not affect the normal operation or throughput of the devices. However, in some special cases where maximum performance is needed from a device, you may want to ensure that it does not share an interrupt with other PCI devices.

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

between the motherboard’s PCI expansion slots and onboard PCI devices. Use this information to avoid sharing an interrupt for 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 39 lists the PIRQ signals and shows how the signals are connected to the PCI expansion slots and to onboard PCI interrupt sources.

Table 39. PCI Interrupt Routing Map

First PCI PIIX4 PIRQ Signal

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

Expansion

Slot: J4E2

Second PCI Expansion Slot: J4E1

Third PCI Expansion Slot: J4D1

Fourth PCI Expansion Slot: J4C1

Onboard Video USB

For example, assume that you plug an add-in card that has one interrupt (group INTA) into the fourth 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. The PCI interrupts will dynamically configure an available interrupt on the interrupt controller contained within the PIIX4.

AN430TX Motherboard Technical Product Specification

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.

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 BIOS and Setup Program

3.1 Introduction

The motherboard uses an Intel BIOS, which is stored in Flash EEPROM and can be upgraded using a floppy disk-based program. In addition to the BIOS, the Flash EEPROM contains the Setup program, Power-On Self Tests (POST), advanced power management (APM), the PCI autoconfiguration utility, and Windows 95-ready Plug and Play. See Section 5.1 for the supported versions of these specifications.

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

The BIOS displays a sign-on message during POST identifying the type of BIOS and a revision code. The initial production BIOS on the motherboard is identified as AN430TX0.86A.

3.1.1 BIOS Flash Memory Organization

The Intel PA28FB200BX 2 Mbit Flash component is organized as 256K x 8 (256 KB). The Flash device is divided into areas as described in Table 40. The table shows the addresses in the ROM image in normal mode (the addresses change in BIOS Recovery Mode).

Table 40. Flash Memory Organization

Address (Hex) Size Description

FFFF0000 - FFFFFFFF 64 KB Main BIOS * FFFEC000 - FFFEFFFF 16 KB Boot Block FFFEA000 - FFFEBFFF 8 KB Virtual Product Data (VPD) Extended System Configuration Data

(ESCD) (DMI configuration data / Plug and Play data) FFFE9000 - FFFE9FFF 4 KB Used by BIOS (e.g., for Event Logging) FFFE8000 - FFFE8FFF 4 KB OEM logo or Scan Flash Area FFFC0000 - FFFE7FFF 160 KB Main BIOS Block

* At runtime, only this section is shadowed into RAM below the 1 MB address

AN430TX Motherboard Technical Product Specification

3.1.2 BIOS Upgrades

Flash memory simplifies distributing BIOS upgrades. You can install a new version of the BIOS from a diskette. BIOS upgrades are available to be downloaded from the secure section on the

Intel bulletin board or from Intel’s FTP or World Wide Web sites (see Section 5.2). The disk-based Flash upgrade utility, IFLASH.EXE, has three options for BIOS upgrades:

• Update the Flash BIOS from a file on a disk

• Copy the current BIOS code from the Flash EEPROM to a disk file as a backup, in the event

that an upgrade cannot be successfully completed

• Compare the BIOS in the Flash device with a file to make sure the computer has the correct

version

The upgrade utility ensures that the upgrade BIOS extension matches the target computer to prevent accidentally installing a BIOS for a different type of computer.

3.1.3 Plug and Play: PCI Auto-configuration

The PCI auto-configuration utility operates in conjunction with the Setup program to let you insert and remove PCI cards without user configuration (Plug and Play). When you turn on the computer after adding a PCI card, the BIOS automatically configures interrupts, I/O space, and other parameters. Any interrupts set to “available” in Setup are considered free for use by PCI add-in cards. PCI interrupts are distributed to available ISA interrupts that have been not been assigned to an ISA card or to system resources. The assignment of PCI interrupts to ISA IRQs is nondeterministic. An ISA device cannot share an interrupt allocated to PCI.

PCI configuration information is stored in ESCD format. You can clear the ESCD data by moving the CMOS Clear jumper (see Section 1.13.3).

For information about the version of PCI and Plug and Play supported by this BIOS, see Section 5.1. You can obtain copies of the specifications from the Intel World Wide Web site (see Section 5.2). Peer-to-peer hierarchical PCI Bridge is supported, and by using an OEM-supplied option ROM or TSR, a PCI-to-PCMCIA bridge capability is possible as well.

3.1.4 PCI IDE Support

If you select “Auto” 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 5.1 for the supported version of ATAPI). The BIOS determines the capabilities of each drive and configures them to optimize capacity and performance. To take advantage of the high capacities typically available today, hard drives are automatically configured for Logical Block Addressing (LBA) and to PIO Mode 3 or 4, depending on the capability of the drive. You can override the auto-configuration options by specifying manual configuration in Setup. The ATAPI Specification recommends that ATAPI devices be configured as shown in Table 41.

BIOS and Setup Program

Table 41. Recommendations for Configuring an ATAPI Device

Primary Cable Secondary Cable

Drive 0 Drive 1 Drive 0 Drive 1 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

3.1.5 ISA Plug and Play

If you select in Setup to boot with a Plug and Play OS (see Section 3.2.4.1), the BIOS autoconfigures only ISA Plug and Play cards that are required for booting (IPL devices). If you select to not boot with a Plug and Play OS, the BIOS auto-configures all Plug and Play ISA cards.

3.1.6 ISA Legacy Devices

Since ISA legacy devices are not auto-configurable, the resources for them must be reserved. You can reserve resources in the Setup program or with an ISA configuration utility (see Section 5.2 for a Web site address).

The computer’s configuration information is stored in ESCD format. You can clear the ESCD data by moving the CMOS Clear jumper (see Section 1.13.3).

3.1.7 Desktop Management Interface

Desktop Management Interface (DMI) is a method of managing computers in an enterprise. The main component of DMI is the Management Information Format (MIF) database, which contains information about the computer and its components. Using DMI, a system administrator can obtain the system types, capabilities, operational status, installation date and other information about the computer’s components. The DMI specification requires that certain information about the computer’s motherboard be made available to an applications program. This information is located in a series of data structures which are accessed in various ways by the DMI service layer. Component instrumentation allows the service layer to gain access to information stored in the general-purpose area of non-volatile RAM. The MIF database defines the data and provides the method for accessing the information.

The BIOS support for DMI enables the maximum benefit from applications such as LANDesk Client Manager from Intel. The BIOS stores and can report on the following types of DMI information:

• BIOS data, such as the BIOS revision level

• Fixed information, such as data about the motherboard, peripherals, serial numbers and asset

tags, etc.

• Information discovered during bootup, such as memory size, cache size, processor speed, etc.

• Dynamic information, such as event detection

AN430TX Motherboard Technical Product Specification

An OEM can use a utility that makes DMI calls to program system and chassis-related information into the Flash memory, so the BIOS can also report that information. Once this information is written, it is locked (read-only).

Intel can provide a utility for making DMI calls to the BIOS. The latest DMI specification is available from Intel (see Section 5.2) and other sites.

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 OSs. Using this support, a DMI service-level application running on a non-Plug and Play OS can access the DMI BIOS information.

3.1.8 Advanced Power Management

The BIOS supports Advanced Power Management (APM); see Section 5.1 for the version supported. You can initiate the energy saving Standby mode in two ways:

• Pressing the optional front panel Sleep/Resume button

• Prolonged inactivity; the timeout period is adjustable in the Setup program

When in Standby mode, the motherboard reduces power consumption by using the processor’s System Management Mode (SMM) capabilities and by spinning down hard drives and reducing power to or turning off VESA DPMS-compliant monitors. In Setup you can select the DPMS mode to use for the monitor: Standby, Suspend, Sleep, or Disabled.

While in Standby mode, the computer retains the ability to respond to external interrupts; it can service requests such as incoming faxes or network messages while unattended. Any keyboard or mouse activity brings the computer out of Standby mode and immediately restores power to the monitor.

APM is disabled in the BIOS by default; however, the computer must be configured with an OS-dependent APM driver for the power-saving features to take effect. For example, Windows 95 enables APM automatically upon detecting the presence of the APM BIOS.

3.1.9 Language Support

The BIOS Setup program and help messages can be supported in 32 languages. Five languages are available at this time: 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 Program (IFLASH.EXE). See Section 5.2 for information about downloading IFLASH and other utilities.

BIOS and Setup Program

3.1.10 Boot Options

Booting from CD-ROM is supported in adherence to the “El Torito” bootable CD-ROM format specification developed by Phoenix Technologies and IBM. Under the Boot Options field in Setup, CD-ROM is one of four possible boot devices, which are defined in priority order. The default settings are:

• First boot device - Removable devices (floppy drive)

• Second boot device - Hard drive

• Third boot device - CD-ROM

• Fourth boot device - Network

If you select CD-ROM as the boot device, it must be the first device.

NOTE

✏

A copy of the “El Torito” specification is available on the Phoenix Web site http://www.ptltd.com/techs/specs.html.

In Setup you can also select the network as a boot device, which allows booting from a network add-in card with a remote boot ROM installed.

3.1.11 OEM Logo or Scan Area

The motherboard supports a 4 KB programmable Flash user area at memory location E8000-E8FFF. You can use this area to display a custom OEM logo during POST, or can insert a binary image that executes at certain times during the POST. A utility is available from Intel to assist with installing a logo into Flash for display during POST.

3.1.12 USB Support

The USB connector on the motherboard allows you to attach any of several USB devices as they become available. Typically, the device driver for USB devices will be managed by the OS. However, because keyboard and mouse support may be needed in the Setup program before the OS boots, the BIOS supports USB legacy keyboards and mice. You can disable this support if necessary.

3.1.13 BIOS Setup Access Jumper

You can move the Setup Access jumper on the motherboard to enable or disable access to the Setup program. The default is for access to be enabled. See Section 1.13.4 for the specific pins on which to place the jumper.

AN430TX Motherboard Technical Product Specification

3.1.14 Recovering BIOS Data

Some types of failure can destroy the BIOS data. For example, the data could be lost if a power outage occurs while your are updating the BIOS in Flash memory. You can recover the BIOS data from a diskette by changing the setting of the BIOS Recovery jumper (see Section 1.13.5).

To create a BIOS recovery diskette, you must make a bootable DOS diskette and place the recovery files on it. The recovery files are available from Intel.

To recover the BIOS, turn off the computer and move the jumper to the BIOS recovery setting. Insert the bootable BIOS recovery diskette in drive A:. Boot the computer to recover the BIOS. Two beeps and the end of floppy access to drive A: indicate a successful BIOS recovery. After a successful recovery, turn off the computer by pressing the power switch for at least 4 seconds, and return the jumper to the original pins to restore normal operation. A series of continuous beeps indicates that the recovery operation failed.

NOTE

✏

No video is displayed during the recovery process.

3.2 BIOS Setup Program

The Setup program lets you modify the configuration for most basic changes without opening the computer. Setup is accessible only during the Power-On Self Test (POST). To enter Setup, press the <F2> key after the POST memory test has begun and before boot begins. See Section 1.13.4 for information on placing the jumper that prevents user access to Setup for security purposes.

3.2.1 Overview of the Setup Menu Screens

Table 42 lists the screens displayed by the Setup program. Setup initially displays the Main menu

screen. In each screen there are options for modifying the computer’s configuration. Select a menu screen by pressing the left <←> or right <→> arrow keys. Use the up <↑> or down <↓> arrow keys to select items in a screen. Use the <Enter> key to select a sub-menu. After you have selected an item, use the <+> and <−> keys to modify the setting.

BIOS and Setup Program

Table 42. Overview of the Setup Menu Screens

Setup Menu Screen Description

Main Set up and modify some of the basic options of a PC, such as time, date,

diskette drives, and hard drives.

Advanced Modify the more advanced features of a PC, such as peripheral configuration

and advanced chipset configuration. Security Specify passwords that can be used to limit access to the computer. Power Access and modify Power Management options. Boot Modify options that affect boot up, such as the boot sequence. Exit Save or discard changes.

Setup Subscreens Description

Floppy Options Used to configure diskette drive interface. Primary IDE Master Used to configure the primary master IDE drive. Primary IDE Slave Used to configure the primary slave IDE drive. Secondary IDE Master Used to configure the secondary master IDE drive. Secondary IDE Slave Used to configure the secondary slave IDE drive. Resource Configuration Used to reserve memory blocks and specific IRQs. Peripheral Configuration Used to configure peripherals. Keyboard Configuration Used to configure keyboard options. Video Configuration Used to configure onboard video resources. DMI Event Logging View and modify DMI event logs. Hard Drive Used to select hard drive. Removable Devices Used to select removable devices.

3.2.2 Main Menu

3.2.2.1 Processor Type

Displays processor type.

3.2.2.2 Processor Speed

Displays processor speed.

3.2.2.3 Cache RAM

Displays size of L2 cache.

3.2.2.4 Total Memory

Displays the total amount of RAM on the motherboard.

3.2.2.5 BIOS Version

Displays the version of the BIOS.

AN430TX Motherboard Technical Product Specification

3.2.2.6 Language

Selects the current default language used by the BIOS. The options are:

• English (US) (default)

• Italiano

• Français

• Deutsch

• Español

3.2.2.7 System Time

Specifies the current time.

3.2.2.8 System Date

Specifies the current date. Select the month, day, and year from a pop-up menu.

3.2.2.9 Floppy Options Submenu

When selected, this is used to configure the diskette drives.

3.2.2.9.1 Diskette A:

Specifies the capacity and physical size of diskette drive A:. The options are:

• 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

3.2.2.9.2 Diskette B:

Specifies the capacity and physical size of diskette drive B:. The options are:

• 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

3.2.2.9.3 Floppy Write Protect

Disables or enables write protect for the diskette drive(s). The options are:

• Disabled (default)

• Enabled

BIOS and Setup Program

3.2.2.10 Primary IDE Master

Reports size of a connected IDE device. When selected, this displays the device configuration subscreen for the Primary IDE master interface.

3.2.2.11 Primary IDE Slave

Reports size of a connected IDE device. When selected, this displays the device configuration subscreen for the Primary IDE slave interface.

3.2.2.12 Secondary IDE Master

Reports size of a connected IDE device. When selected, this displays the device configuration subscreen for the Secondary IDE master interface.

3.2.2.13 Secondary IDE Slave

Reports size of a connected IDE device. When selected, this displays the device configuration subscreen for the Secondary IDE slave interface.

3.2.3 Primary/Secondary IDE Master/Slave Configuration Submenus

Used to manually configure the hard drive or have the computer automatically configure it.

3.2.3.1 Type

Selects the drive type that corresponds to the drive installed in your system. If set to User, the number of Cylinders, Heads, and Sectors can be modified. The options are:

• None

• ATAPI Removable

• IDE Removable

• CD-ROM

• User

• Auto (default)

3.2.3.2 Cylinders

If device configuration is set to Auto, this field reports the number of cylinders for your hard disk and cannot be modified. If IDE Device Configuration is set to User Definable, you must type the correct number of cylinders for your hard disk.

3.2.3.3 Heads

If device configuration is set to Auto, this field reports the number of heads for your hard disk and cannot be modified. If IDE Device Configuration is set to User Definable, you must type the correct number of heads for your hard disk.

AN430TX Motherboard Technical Product Specification

3.2.3.4 Sectors

If device configuration is set to Auto, this field reports the number of sectors for your hard disk and cannot be modified. If IDE Device Configuration is set to User Definable, you must type the correct number of sectors for your hard disk.

3.2.3.5 Maximum Capacity

Reports the maximum capacity of your hard disk, which is calculated from the number of cylinders, heads, and sectors. There are no options.

3.2.3.6 Multi-Sector Transfers

Determines the number of sectors per block for multiple sector transfers. The options are:

• Disabled

• 2 Sectors

• 4 Sectors

• 8 Sectors

• 16 Sectors (default)

Check the specifications for your hard disk drive to determine which setting provides optimum performance for your drive.

3.2.3.7 LBA Mode Control

Specifies the IDE translation mode. LBA causes logical block addressing to be used in place of Cylinders, Heads, and Sectors. The options are:

• Disabled

• Enabled (default)

CAUTION

Do not change the IDE translation mode from the option selected when the hard drive was formatted. Changing the option after formatting can result in corrupted data.

3.2.3.8 32 Bit I/O

Enables or disables 32 bit IDE data transfers. The options are:

• Disabled (default)

• Enabled

3.2.3.9 Transfer Mode

Sets how fast the transfers occur on the IDE interface. The options are:

• Standard

• Fast PIO 1

• Fast PIO 2

• Fast PIO 3

• Fast PIO 4 (default)

3.2.3.10 Ultra DMA

Sets the Ultra DMA mode for the hard disk drive. The options are:

• Disabled (default)

• Mode 0

• Mode 1

• Mode 2

3.2.4 Advanced Menu

3.2.4.1 Plug & Play O/S

Select Yes if a Plug and Play operating system is being used. The options are:

• No

• Yes (default)

3.2.4.2 Reset Configuration Data

Used to clear the computer’s configuration data. The options are:

• No (default)

• Yes

BIOS and Setup Program

3.2.4.3 Memory Cache

The options are:

• Disabled

• Enabled (default)

3.2.4.4 Memory Bank 0

This status field reports the size and type of memory module in bank 0. There are no options.

3.2.4.5 Memory Bank 1

This status field reports the size and type of memory module in bank 1. There are no options.

3.2.4.6 Resource Configuration Submenu

3.2.4.6.1 Memory Reservation

Reserves specific upper memory blocks for use by legacy ISA devices. The options are:

• 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

AN430TX Motherboard Technical Product Specification

3.2.4.6.2 IRQ Reservation

Reserve specific IRQs for use by legacy ISA devices. The options are:

• IRQ3 Available | Reserved

• IRQ4 Available | Reserved

• IRQ5 Available | Reserved

• IRQ7 Available | Reserved

• IRQ9 Available | Reserved

• IRQ10 Available | Reserved

• IRQ11 Available | Reserved

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

3.2.4.7 Peripheral Configuration Submenu

3.2.4.7.1 Serial Port A

Used to configure Serial Port A. The options are:

• Disabled

• Enabled

• Auto (Setup assigns the first free COM port, normally COM1, 3F8h, IRQ4) (default)

An * (asterisk) indicates a conflict with another device.

3.2.4.7.2 Serial Port B

Used to configure Serial Port B. The options are:

• Disabled

• Enabled

• Auto (Setup assigns the first free COM port, normally COM2, 2F8h, IRQ3) (default)

An * (asterisk) indicates a conflict with another device.

3.2.4.7.3 Mode

Sets the mode for Serial Port B: for normal (COM 2) or infrared applications. The options are:

• Normal (default)

• IrDA

• ASK-IR

3.2.4.7.4 Parallel Port

Used to configure the parallel port. The options are:

• Disabled

• Enabled

• Auto (Setup assigns LPT1, 378h, IRQ7) (default)

An * (asterisk) indicates a conflict with another device.

3.2.4.7.5 Mode

Selects the mode for the parallel port. The options are:

• Output only (operates in AT

†

-compatible mode)

• Bi-directional (operates in bidirectional PS/2-compatible mode) (default)

• EPP (Extended Parallel Port, a high-speed bidirectional mode)

• ECP (Enhanced Capabilities, a high-speed bidirectional mode)

3.2.4.7.6 Floppy disk controller

Configures the floppy disk controller. The options are:

• Disabled

• Enabled (default)

3.2.4.7.7 IDE Controller

Configures the IDE controller. The options are:

• Disabled

• Primary

• Secondary

• Both (primary and secondary) (default)

BIOS and Setup Program

3.2.4.7.8 Audio

Enables or disables the onboard audio subsystem. The options are:

• Disabled

• Enabled (default)

3.2.4.8 Keyboard Features Submenu

3.2.4.8.1 Numlock

Sets the power on state of the Numlock feature on the numeric keypad of your keyboard. The options are:

• Auto (default)

• On

• Off

3.2.4.8.2 Key Click

Enables the key click option. The options are:

• Disabled (default)

• Enabled

AN430TX Motherboard Technical Product Specification

3.2.4.8.3 Keyboard Auto-repeat Rate

Selects the key repeat rate. The options are:

• 30/sec (default)

• 26.7/sec

• 21.8/sec

• 18.5/sec

• 13.3/sec

• 10/sec

• 6/sec

• 2/sec

3.2.4.8.4 Keyboard Auto-repeat Delay

Selects the delay before key repeat. The options are:

• ¼ sec

• ½ sec (default)

• ¾ sec

• 1 sec

3.2.4.9 Video Configuration Subscreen

3.2.4.9.1 Palette Snooping

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

• Disabled (default)

• Enabled

3.2.4.9.2 Video Monitor Type

Selects the type of video monitor being used. (Available only with the ATI-ImpacTV option.) The options are:

• VGA

• VGA and TV Out (default)

3.2.4.9.3 TV Out Signal Type

Selects the type of TV Out signal to be used. (Available only with the ATI-ImpacTV option.) The options are:

• NTSC (North America) (default)

• PAL (Europe)

• PAL-M (South America)

BIOS and Setup Program

3.2.4.10 DMI Event Logging Sub-menu

3.2.4.10.1 Event Log Capacity

Indicates if there is space available in the event log. There are no options.

3.2.4.10.2 Event Log Validity

Indicates if the contents of the event log are valid. There are no options.

3.2.4.10.3 View DMI event log

Enables viewing of DMI event log. Press <Enter> to view the event log. If there are no event logs stored, the screen will read “No unread events”.

3.2.4.10.4 Clear all DMI event logs

Clears the DMI Event Log after rebooting. The options are:

• No (default)

• Yes

3.2.4.10.5 Event Logging

Enables Logging of DMI events. The options are:

• Disabled

• Enabled (default)

3.2.4.10.6 Mark DMI Events as read

Used to mark all DMI events as read. Press <Enter> to access the confirmation dialog box.

3.2.5 Security Menu

3.2.5.1 User Password Is

Reports if there is a User password set. There are no options.

3.2.5.2 Supervisor Password Is

Reports if there is a Supervisor password set. There are no options.

3.2.5.3 Set User Password

Sets the User password. The user will be asked to enter the new password and confirm the new password. The password can be up to seven alphanumeric characters.

3.2.5.4 Set Supervisor Password

Sets the Supervisor password. The user will be asked to enter the new password and confirm the new password. The password can be up to seven alphanumeric characters.

AN430TX Motherboard Technical Product Specification

3.2.5.5 Unattended Start

When enabled, the computer will boot; however, if the computer is password protected, the keyboard will be locked. Enter the user password to unlock the computer. The user password is also required to boot from the floppy drive. The options are:

• Disabled (default)

• Enabled

3.2.6 Power Menu

3.2.6.1 Power Management

Enables or disables the BIOS Advanced Power Management feature. When set to disabled, fields for Inactivity Timer, Hard Drive, and Video will not appear. The options are:

• Disabled (default)

• Enabled

3.2.6.2 Inactivity Timer

Sets the amount of time before the computer enters standby mode. The options are:

• Off (default)

• 1 Minute

• 2 Minutes

• 4 Minutes

• 6 Minutes

• 8 Minutes

• 12 Minutes

• 16 Minutes

3.2.6.3 Hard Drive

Enables the hard drive to be power managed during Standby and Suspend. The options are:

• Disabled

• Enabled (default)

3.2.6.4 Video

Enables video to be power managed during Standby and Suspend. The options are:

• Disabled

• Enabled (default)

3.2.7 Boot Menu

3.2.7.1 Scan User Flash Area

Allows BIOS to scan the flash memory for user binaries. The options are:

• Disabled (default)

• Enabled

BIOS and Setup Program

3.2.7.2 First Boot Device

This status field reports the category of bootable device. The options are one (and only one) of the following:

• Removable devices

• Hard Drive

• ATAPI CD-ROM devices

• Network boot

3.2.7.3 Second Boot Device

This status field reports the category of bootable device. The options are one (and only one) of the following:

• Removable devices

• Hard Drive

• ATAPI CD-ROM devices

• Network boot

3.2.7.4 Third Boot Device

This status field reports the category of bootable device. The options are one (and only one) of the following:

• Removable devices

• Hard Drive

• ATAPI CD-ROM devices

• Network boot

3.2.7.5 Fourth Boot Device

This status field reports the category of bootable device. The options are one (and only one) of the following:

• Removable devices

• Hard Drive

• ATAPI CD-ROM devices

• Network boot

3.2.7.6 Hard Drive

This screen lists the available hard drive devices. The computer attempts to boot the operating system from the first hard-drive in this list. If no operating system is found, the computer tries the next drive listed until an operating system is found.

The options are any available hard drives. Press <Enter> for a list of available devices. To select the boot device, use the up <↑> or down <↓> arrow keys. Press <+> to move the device up the list, or <-> to move it down the list. Press <Esc> to exit this menu.

AN430TX Motherboard Technical Product Specification

3.2.7.7 Removable Devices

This screen lists the available removable devices. The operating system assigns drive letters to these devices in the order listed. You may change the sequence and therefore the drive lettering for these devices by pressing the <+> or <-> keys.

The options are any available removable devices. Press <Enter> for a list of available devices. To select the boot device, use the up <↑> or down <↓> arrow keys. Press <+> to move the device up the list, or <-> to move it down the list. Press <Esc> to exit this menu.

3.2.8 Exit Menu

This section describes how to exit Setup with or without saving the changes you have made to battery-backed CMOS RAM.

3.2.8.1 Exit Saving Changes

Exits Setup and saves the changes in CMOS RAM. You can also press the <F10> key anywhere in the Setup program to do this.

3.2.8.2 Exit Discarding Changes

Exits Setup program without saving any changes. This means that any changes you have made while in Setup are discarded and not saved. Pressing the <Esc> key in any of the four main screens will also exit and discard changes.

3.2.8.3 Load Setup Defaults

Returns all of the Setup options to their defaults. The default Setup values are loaded from the ROM table. You can also press the <F9> key anywhere in Setup to load the defaults.

3.2.8.4 Load Custom Defaults

Loads the setup settings from the Custom Defaults.

3.2.8.5 Save Custom Defaults

Normally, the BIOS reads the setup settings from battery backed CMOS RAM. If the CMOS RAM fails, the BIOS uses the Custom Defaults (if you have set them). If no Custom Defaults are set, the BIOS uses the factory defaults.

3.2.8.6 Discard Changes

Discards any changes made up to this point in Setup without exiting Setup. This selection loads the CMOS RAM values that were present when the computer was turned on.

4 Error Messages

4.1 BIOS Error Messages

Table 43. BIOS Error Messages

Error Message Explanation

Diskette drive A error or Diskette drive B error

Extended RAM Failed at offset: nnnn Extended memory not working or not configured properly at offset

Failing Bits: nnnn The hex number nnnn is a map of the bits at the RAM address (in

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

Incorrect Drive A type - run SETUP Type of floppy drive A: not correctly identified in Setup. Incorrect Drive B type - run SETUP Type of floppy drive B: not correctly identified in 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

Keyboard locked - Unlock key switch Unlock the system to proceed. Monitor type does not match CMOS -

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

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

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

Drive A: or B: is present but fails the BIOS POST diskette tests. Check to see that the drive is defined with the proper diskette type in Setup and that the diskette drive is attached correctly.

nnnn.

System, Extended, or Shadow memory) which failed the memory test. Each 1 (one) in the map indicates a failed bit.

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

stuck key.

Monitor type not correctly identified in Setup.

Enter 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 ????.

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

continued ☛

AN430TX Motherboard Technical Product Specification

Table 43. BIOS Error Messages (continued)

Error Message Explanation

Previous boot incomplete - Default configuration used

Real time clock error Real-time clock fails BIOS test. May require board repair. Shadow Ram Failed at offset: nnnn Shadow RAM failed at offset nnnn of the 64k block at which the

System battery is dead - Replace and run SETUP

System cache error - Cache disabled RAM cache failed the BIOS test. BIOS disabled the cache. System CMOS checksum bad - run

SETUP

System RAM Failed at offset: nnnn System RAM failed at offset nnnn of in the 64k block at which the

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

Previous POST did not complete successfully. POST loads default values and offers to run Setup. If the failure was caused by incorrect values and they are not corrected, the next boot will likely fail. On systems with control of wait states, improper Setup settings can also terminate POST and cause this error on the next boot. Run Setup and verify that the wait-state configuration is correct. This error is cleared the next time the system is booted.

error was detected. The CMOS clock battery indicator shows the battery is dead.

Replace the battery and run Setup to reconfigure the system.

System CMOS 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.

error was detected.

4.2 Port 80h POST Codes

During POST (power-on self test), 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 the use of 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 motherboard’s BIOS. Some codes are repeated in the table because that code applies to more than one operation.

Table 44. Port 80h Codes

Code Description of POST Operation Currently In Progress

02h Verify Real Mode 03h Disable Non-Maskable Interrupt (NMI) 04h Get CPU 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 11h Load alternate registers with initial POST values 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 8742 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)

xxxx

* of low byte of memory bus

xxxx

* of high byte of memory bus

Error Messages

continued ☛

AN430TX Motherboard Technical Product Specification

Table 44. Port 80h Codes (continued)

Code Description of POST Operation Currently In Progress

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 values 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 (Rel. 5.1 and earlier) 48h Check video configuration against CMOS 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 board 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 Multi Processor APIC 68h Enable external and CPU 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

continued ☛

Table 44. Port 80h Codes (continued)

Code Description of POST Operation Currently In Progress

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 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 multi-processor boards 94h Disable A20 address line (Rel. 5.1 and earlier) 95h Install CD-ROM for boot 96h Clear huge ES segment register 97h Fixup Multi Processor table 98h Search for option ROMs. One long, two short beeps on checksum failure 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

Error Messages

continued ☛

AN430TX Motherboard Technical Product Specification

Table 44. Port 80h Codes (continued)

Code Description of POST Operation Currently In Progress

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 BCh Clear parity checkers BDh Display MultiBoot menu BEh Clear screen (optional) BFh Check virus and backup reminders C0h Try to boot with INT 19 C1h Initialize POST Error Manager (PEM) C2h Initialize error logging C3h Initialize error display function C4h Initialize system error handler

The following are for boot block in Flash ROM

E0h Initialize the chipset E1h Initialize the bridge E2h Initialize the CPU 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 Multi Processor EAh Initialize OEM special code EBh Initialize PIC and DMA ECh Initialize Memory type EDh Initialize Memory size

continued ☛

Table 44. Port 80h Codes (continued)

Code Description of POST Operation Currently In Progress

EEh Shadow Boot Block EFh System memory test F0h Initialize interrupt vectors F1h Initialize Run Time Clock F2h Initialize video F3h Initialize beeper F4h Initialize boot F5h Clear Huge segment F6h Boot to Mini DOS F7h Boot to Full DOS

Error Messages

5 Specifications and Online Support

5.1 Specifications

The motherboard complies with the following specifications:

Table 45. Compliance with Specifications

Specification Description Revision Level

APM Advanced Power Management

BIOS interface specification

ATA-33 Synchronous DMA Transfer

Protocol specification (to be proposed as Ultra DMA/33

standard) ATX ATX form factor specification Revision 2.01, February 1997 DDC Display Data Channel standard Version 2, Revision 0, April 9, 1996

DMI Desktop Management Interface

BIOS specification

DPMS Display Power Management

Signaling

“El Torito” Bootable CD-ROM format

specification EPP Enhanced Parallel Port IEEE 1284 standard, Mode [1 or 2] Feature

Connector IrDA Serial Infrared Physical Layer Link

PCI PCI Local Bus specification Revision 2.1, June 1, 1995

Plug and Play Plug and Play BIOS specification Version 1.0a, May 5, 1994

UHCI Universal Host Controller Interface Revision 1.0 USB Universal Serial Bus specification Revision 1.0, January 15, 1996

Advanced Feature Connector

(VAFC)

specification

Revision 1.2, February, 1996 Intel, Microsoft

Revision 0.7, May 21, 1996 Quantum document no. 70-108412-1

Video Electronics Standards Association Version 2.0, October 16, 1995

American Megatrends Inc., Award Software International Inc., Dell Computer Corporation, Intel, Phoenix Technologies Ltd, SystemSoft Corporation

Revision 1.0 Video Electronics Standards Association

Version 1.0, January 25, 1995 Phoenix Technologies, IBM Corporation

Version 1.0, March 1994 Video Electronics Standards Association

Version 1.1, October 17, 1995 Infrared Data Association.

PCI Special Interest Group

Compaq Computer Corp, Phoenix Technologies, Intel

Compaq, Digital Equipment Corporation, IBM PC Company, Intel, Microsoft, NEC, Northern Telecom

AN430TX Motherboard Technical Product Specification

5.2 Online Support

Find information about Intel motherboards under “Product Info” or “Customer Support” at this World Wide Web site:

http://www.intel.com/

or at this FTP site:

ftp://ftp.intel.com/pub/bios/

Index

116450, 17 16550A, 17

AMI Megakey, 18 APM, 79 ATA-33, 79 ATI TractorBeam, 21 ATI-264GT Rage II+, 19 ATX, 79

B-C

battery, 18 BIOS, recovery jumper, 43 cache controller, 14 certification markings, 46 CISPR 22 compliance, 46 CSA compliance, 45

DDC2, 79 DMA controller, 15 DMI, 79 DPMS, 79 DRAM controller, 15 drivers, video capture, 21

ECP, 18 El Torito, 79 EMI regulations, 46 EMKO-TSE compliance, 45 EN 50 082-1 compliance, 46 EN 55 022 compliance, 46 EN 60 950 compliance, 45 EPP, 18, 79 error messages, port 80h codes, 72 expansion slots, 38

FCC compliance, 46 Feature Connector, 79 floppy drive controller, 18 form factor, 79 FTP site, 80

G-H

graphics controller, 19 heat sink, clips for, 12 hot key, 18

I/O controller, 17 I2C bus, 20 I2C connector, 37 ICES-003 compliance, 46 IDE interface, 15 IEC 950 compliance, 45 infrared, 19 interrupt controller, 15 interrupts, sharing PCI, 51 INTx PCI interrupt classification, 51 IrDA, 19, 79 ISA bus connectors, 39, 40 ISA Plug and Play, 17

J-M

jumpers, BIOS recovery, 43 keyboard interface, 18 mouse interface, 18 MPEG, 20 MTXC, 14

AN430TX Motherboard Technical Product Specification

parallel port, 18 PC87307VUL, 17 PCI, 79

bus connectors, 38 bus interface, 15 expansion slots, 51

interrupt sharing, 51 PIIX4, 51 PIRQ signals, 51 Plug and Play, 79 port 80h codes, 72 POST (Power On Self Test), diagnostic

codes, 72 power management control, 15 product certification markings, 46

R-S

recovering BIOS data, 43 regulatory compliance, 45 safety regulations, 45 SECAM, 20 serial ports, 17

sharing interrupts, 51 slots for add-in cards, 38 specifications, 79 Super I/O controller, 17 S-Video, 21 S-video connector, 36, 37

T-U

TractorBeam, 21 TV-out, 21 UARTs, 17 UL compliance, 45 USB, 79

controller, 15

V-W

VCCI compliance, 46 VESA, 79 VESA connector, 20 video out, 21 video resolutions, 20 World Wide Web site, 80

Intel AN430TX - Motherboard - ATX Technical Product Specification

Specifications and Main Features

Frequently Asked Questions

User Manual