Intel AN430TX User's Manual
Contents
1. Revision of Section 3 1 4 PCI IDE Support a AN430TX SPECIFICATION UPDATE intel The errata described in this specification update apply to combinations of PBA revision and BIOS revision as shown in the table below Descriptions of the individual errata referred to by number in the table below are found in the ERRATA section of this document PBA Revision BIOS Revision Errata That Apply 669379 304 4A3NT0X0 86A 0042 P02 1 3 5 15 17 18 20 21 4A3NT0X0 86A 0047 P03 1 3 5 15 17 18 20 21 4A3NT0X0 86A 0062 P06 1 2 5 6 8 10 1 o 4 15 17 18 20 4A3NT0X0 86A 0082 P07 1 2 6 8 10 11 14 16 18 21 4A3NTOX0 86A 0086 P08 1 2 6 8 10 11 14 16 19 21 4A3NT0X0 86A4 0088 P09 1 2 6 8 10 11 14 15 20 21 669379 305 4A3NT0X0 86A 0042 P02 1 3 5 15 17 18 20 21 4A3NT0X0 86A 0047 P03 1 3 5 15 17 18 20 21 4A3NT0X0 86A 0062 P06 1 2 5 6 8 10 1 a 4 15 17 18 20 4A3NTOX0 86A 0082 P07 1 2 6 8 10 11 14 16 18 21 4A3NTOX0 86A 0086 P08 1 2 6 8 10 11 14 16 19 21 4A3NTOX0 86A 0088 P09 1 2 6 8 10 11 14 15 20 21 669379 306 4A3NT0X0 86A 0042 P02 1 3 5 15 17 18 20 21 4A3NT0X0 86A 0047 P03 1 3 5 15 17 18 20 21 4A3NT0X0 86A 0062 P06 1 2 5 6 8 10 1 4 15 17 18 20 4A3NTOX0 86A 0082 P07 1 2 6 8 10 11 14 16 18 21 4A3NTOX0 86A 0086 P08 1 2 6 8 10 11 14 16 19 21 4A3NT0X0 86A4 0088 P09 1 2 6 8 10 11 14 15 20 21 669379 307 4A3NT0X0 86A 0042 P02 1 3 5 15 17 18 20 21 4A3NT0X0 86A 0047 P03 1 3 5 152. 15 Advanced Power Management May Suspend System During CD ROM Playback PROBLEM ATAPI devices such as CD ROM and DVD drives do not reset the inactivity timer that is used by Advanced Power Management to determine when to place the system into suspend mode IMPLICATION When playback of an audio CD or a DVD file is the only system activity the system will go into suspend mode when the inactivity timer expires WORKAROUND Temporarily disable the Low power standby and Shut off monitor options on the Display Properties Screen Saver menu This menu is available from the Windows 95 Control Panel STATUS This erratum will not be fixed 16 BIOS Does Not Correctly Size 64 MB or Larger DIMMs PROBLEM Because of an incorrect register setting in the memory controller the BIOS may not correctly identify the size of 64 MB or larger DIMMs IMPLICATION Only 16 MB of the memory will be reported by the power on self test POST The additional memory will not be available to the operating system This erratum applies only to BIOS revision 4A3NT0X0 86A 0082 P07 and later WORKAROUND None STATUS This erratum was fixed in BIOS revision 4A3NT0X0 86A 0088 P09 13 a AN430TX SPECIFICATION UPDATE intel 17 System Will Not Boot with Network as First Boot Device PROBLEM The feature allowing the system to boot from the network is not implemented After the attempt to boot from a network device selected as the first boot device fails
3. 3 x session within OS 2 Warp IMPLICATION No audio is available during a Windows 3 x session within OS 2 Warp Normal audio support will be available in native OS 2 Warp WORKAROUND None STATUS This erratum will not be fixed 3 System BIOS Does Not Recognize Bootable USB Devices PROBLEM The system BIOS does not recognize a USB keyboard or mouse during a system boot A USB keyboard or mouse is not recognized until an operating system that supports USB is loaded IMPLICATION 1 The user is not able to use a USB keyboard to enter the BIOS Setup or to respond to error messages that are displayed before an operating system with USB support is loaded 2 The user is not able to use a USB keyboard or mouse with any operating system that does not have USB support WORKAROUND Use a standard PS 2 style keyboard and mouse in any configuration where input is required before an operating system with USB support is loaded STATUS This erratum was fixed in BIOS revision 4A3NT0X0 86A 0062 P06 4 Video Corruption or No Video on Boot PROBLEM An ATI 264GTU device initialization problem will occur on power up when the power supply ramping of the 3 3 V leads the 5 0 V by 5 ms or more The 2 01 ATX Specification recommends that the 3 3 V DC rails always be held at a lower potential than the 5 V DC rails during power up and power down transition IMPLICATION The onboard video device will not initialize causing the system to display video corr
4. or mouse is used USB activity is not monitored by the APM event counter therefore activity from a USB keyboard or mouse will not keep the system awake or bring a system out of APM sleep mode If a USB keyboard or mouse is being used APM should be disabled 2 LS 120 Drive and Floppy Will Not Function as Expected for BIOS Recovery The following note will be added to Section 3 1 14 Recovering BIOS Data The LS 120 drive does not work as a legacy floppy drive when attempting to perform a BIOS recovery A 1 44 MB disk must be used in place of an LS 120 disk in the LS 120 drive for BIOS recovery 3 PCI 2 1 Specification Optional Features The following will be added to Section 1 12 Add in Board Expansion Connectors The following optional features in the PCI 2 1 Specification are not implemented on the AN430TX motherboard e Cache Support Pins SBO and SDONE Section 2 2 7 e PRSNTx Section 2 2 8 CLKRUN Section 2 2 8 e 64 Bit Bus Extension Pins Section 2 2 9 e 66 MHz support Section 2 2 8 e _ JTAG Boundary scan Section 2 2 10 4 Supervisor and User Passwords The following will be added to Section 3 2 5 Security Menu If a supervisor password has been set but no user password has been set a user can create a password by entering BIOS Setup at boot by pressing the F2 key and pressing enter at the supervisor password prompt Once in Setup a user will be able to create a new user password 16 a intel AN430
5. rails Section 4 2 e All timing parameters Section 4 2 1 3 e All voltage tolerances Section 4 2 2 20 a intel AN430TX SPECIFICATION UPDATE 11 Revision of Section 3 1 12 USB Support This section will be replaced in its entirety as follows USB LEGACY SUPPORT USB legacy support enables USB keyboards and mice to be used even when no operating system USB drivers are in place By default USB legacy support is disabled USB legacy support is only intended to be used in accessing BIOS Setup and installing an operating system that supports USB This sequence describes how USB legacy support operates in the default disabled mode 1 When you power up the computer USB legacy support is disabled 2 POST begins 3 USB legacy support is temporarily enabled by the BIOS This allows you to use a USB keyboard to enter the Setup program or the maintenance mode 4 POST completes and disables USB legacy support unless it was set to Enabled while in Setup 5 The operating system loads While the operating system is loading USB keyboards and mice are not recognized After the operating system loads the USB drivers the USB devices are recognized To install an operating system that supports USB enable USB Legacy support in BIOS Setup and follow the operating system s installation instructions Once the operating system is installed and the USB drivers configured USB legacy support is no longer used USB Legacy Support can be lef
6. system BIOS cannot detect the secondary IDE hard drive WORKAROUND None STATUS This erratum was fixed in BIOS revision 4A3NT0X0 86A 0062 P06 12 a intel AN430TX SPECIFICATION UPDATE 13 System BIOS May Corrupt Audio Add In Card EEPROM PROBLEM Audio add in cards using the Yamaha OPL3 SA2 or OPL3 SA3 audio codec have the same hardware identification number that is used by the Yamaha audio device integrated on the motherboard This causes the system BIOS to inadvertently write information into the audio add in card s serial EEPROM during system startup thereby corrupting the audio add in card s EEPROM contents IMPLICATION The audio add in card will not operate and no audio will be available WORKAROUND Disable the onboard audio in BIOS Setup before installing an audio add in card STATUS This erratum was fixed in BIOS revision 4A3NT0X0 86A 0062 P06 14 Windows 95 Will Not Boot if LS 120 Drive is Only Device on IDE Channel PROBLEM An LS 120 drive will not be recognized by Windows 95 if it is the only device on the IDE channel IMPLICATION If an LS 120 drive is the only device on an IDE channel a black screen with a cursor blinking in the upper left hand corner will be displayed when Windows 95 is starting to boot and the system will hang WORKAROUND The LS 120 drive is recognized when connected as either the master or the slave on an IDE channel with another device STATUS This erratum will not be fixed
7. 17 18 20 21 4A3NT0X0 86A 0062 P06 1 2 5 6 8 10 11 14 15 17 18 20 21 4A3NT0X0 86A4 0082 P07 1 2 6 8 10 11 14 16 18 21 4A3NT0X0 86A4 0086 P08 1 2 6 8 10 11 14 16 19 21 4A3NT0X0 86A4 0088 P09 1 2 6 8 10 11 14 15 20 21 669379 308 669379 309 PBA Revision BIOS Revision Errata That Apply 680904 302 680904 303 4A3NT0X0 86A 0042 P02 4A3NTOX0 86A 0047 P03 4A3NT0X0 86A4 0062 P06 4A3NT0X0 86A4 0082 P07 4A3NT0X0 86A4 0086 P08 4A3NT0X0 86A4 0088 P09 4A3NT0X0 86A 0042 P02 4A3NT0X0 86A 0047 P03 4A3NT0X0 86A4 0062 P06 4A3NT0X0 86A4 0082 P07 4A3NT0X0 86A4 0086 P08 4A3NT0X0 86A4 0088 P09 4A3NT0X0 86A 0042 P02 4A3NT0X0 86A 0047 P03 4A3NT0X0 86A 0062 P06 4A3NT0X0 86A4 0082 P07 4A3NT0X0 86A4 0086 P08 4A3NT0X0 86A4 0088 P09 4A3NT0X0 86A 0042 P02 4A3NT0X0 86A 0047 P03 4A3NT0X0 86A4 0062 P06 4A3NT0X0 86A4 0082 P07 4A3NT0X0 86A4 0086 P08 4A3NT0X0 86A4 0088 P09 AN430TX SPECIFICATION UPDATE 1 3 5 15 17 18 20 21 1 3 5 15 17 18 20 21 1 2 5 6 8 10 11 14 15 17 18 20 21 1 2 6 8 10 11 14 16 18 21 1 2 6 8 10 11 14 16 19 21 1 2 6 8 10 11 14 15 20 21 1 3 5 15 17 18 20 21 1 3 5 15 17 18 20 21 1 2 5 6 8 10 11 14 15 17 18 20 21 1 2 6 8 10 11 14 16 18 21 1 2 6 8 10 11 14 16 19 21 1 2 6 8 10 11 14 15 20 21 1 7 9 15 17 18 20 21 1 7 9 15 17 18 20 21 1 2 4 6 10 11 14 15 17 18 20 21 1 2 4 6 10 11 14 16 18 21 1 2 4 6 10 11 14 16
8. 19 21 1 2 4 6 10 11 14 15 20 21 1 7 9 15 17 18 20 21 1 7 9 15 17 18 20 21 1 2 4 6 10 11 14 15 17 18 20 21 1 2 4 6 10 11 14 16 18 21 1 2 4 6 10 11 14 16 19 21 1 2 4 6 10 11 14 15 20 21 AN430TX SPECIFICATION UPDATE IN e PBA Revision BIOS Revision Errata That Apply 680904 304 4A3NT0X0 86A 0042 P02 1 7 9 15 17 18 20 21 4A3NT0X0 86A 0047 P03 1 7 9 15 17 18 20 21 4A3NT0X0 86A 0062 P06 1 2 4 6 10 11 14 15 17 18 20 21 4A3NT0X0 86A4 0082 P07 1 2 4 6 10 11 14 16 18 21 4A3NT0X0 86A4 0086 P08 1 2 4 6 10 11 14 16 19 21 4A3NT0X0 86A4 0088 P09 1 2 4 6 10 11 14 15 20 21 680904 305 4A3NT0X0 86A 0042 P02 1 7 9 15 17 18 20 21 4A3NT0X0 86A 0047 P03 1 7 9 15 17 18 20 21 4A3NT0X0 86A 0062 P06 1 2 4 6 10 11 14 15 17 18 20 21 4A3NT0X0 86A4 0082 P07 1 2 4 6 10 11 14 16 18 21 4A3NT0X0 86A4 0086 P08 1 2 4 6 10 11 14 16 19 21 4A3NT0X0 86A4 0088 P09 1 2 4 6 10 11 14 15 20 21 NOTE This combination of BIOS revision and PBA revision has not undergone regression testing Use of a PBA with down revision BIOS is an untested combination and is undertaken at the user s risk a intel AN430TX SPECIFICATION UPDATE SPECIFICATION CHANGES The Specification Changes listed in this section apply to the AN430TX Motherboard Technical Product Specification Order Number 282955 All Specification Changes will be incorporated into a future version of that specification 1
9. 1997 Updated Erratum 3 Added Errata 7 10 and Documentation Change 11 November 1997 007 Updated Errata 9 10 and Documentation Change 11 Added Erratum 11 and Documentation Changes 12 13 December 1997 Added Erratum 12 and Specification Clarifications 6 7 January 1998 009 Added Errata 13 14 and Specification Clarification 8 February 1998 Added Erratum 15 April 1998 Added Erratum 16 and Documentation Change 14 May 1998 Added Errata 17 18 Updated Errata 5 13 and 16 June 1998 Added Documentation Change 15 July 1998 014 Added Erratum 19 and Documentation Change 16 Updated status of Erratum 16 August 1998 Added Erratum 20 September 1998 Added Erratum 21 Updated status of Erratum 20 m AN430TX SPECIFICATION UPDATE intel PREFACE This document is an update to the specifications contained in the AN430TX Motherboard Technical Product Specification Order Number 282955 It is intended for hardware system manufacturers and software developers of applications operating systems or tools It will contain Specification Changes Errata Specification Clarifications and Documentation Changes Refer to the Pentium Processor Specification Update Order Number 242480 for specification updates concerning the Pentium processor Items contained in the Pentium Processor Specification Update that either do not apply to the AN430TX motherboard or have been worked around are noted in this document Otherwise it should be assumed
10. 71AB PIIX4 Specification Update Order Number 297738 either do not apply to the AN430TX motherboard or have been worked around in this PBA and or BIOS revision All other errata associated with the PClset apply to this PBA revision For specific details of any erratum please refer to the 82371AB PIIX4 Specification Update 5 The following errata contained in Part of the Pentium Processor Specification Update Order Number 242480 either do not apply to the AN430TX motherboard or have been worked around in this PBA and or BIOS revision 5 7 9 11 13 14 16 17 29 31 34 36 37 39 40 46 48 50 58 60 64 66 67 69 71 all DP errata all AP errata all TCP errata All other errata in Part may apply to this revision level of the motherboard depending on the stepping of the processor or the specific software that is being executed Also some of these errata apply only to motherboards being used in an application development environment For specific details of any erratum please refer to the Pentium Processor Specification Update a AN430TX SPECIFICATION UPDATE intel Summary Table of Changes The following table indicates the Specification Changes Errata Specification Clarifications or Documentation Changes which apply to the AN430TX motherboard Intel intends to fix some of the errata in a future revision of the motherboard and to account for the other outstanding issues through documentation or specification chang
11. A is subsequently accessed the system will lock up The problem does not occur if a 1 44 MB 3 1 2 floppy drive is also present as either drive A or drive B WORKAROUND None STATUS This erratum was fixed in BIOS revision 4A3NT0X0 86A 0062 P06 10 Serial Mouse Activity Does Not Wake System After APM Shutdown PROBLEM The system BIOS does not recognize activity from a serial mouse as an APM event IMPLICATION The system will not be restored from a power managed state until keyboard activity occurs WORKAROUND The system BIOS does recognize activity from a PS 2 style mouse STATUS This erratum will be fixed in a future BIOS revision 11 Stuck or Depressed Key During POST May Cause System Hang PROBLEM The BIOS is unable to detect when a key on the keyboard is stuck or depressed during Power On Self Test POST IMPLICATION If a key is stuck or depressed during POST the system BIOS will continue to read data from the keyboard resulting in a system hang condition WORKAROUND None STATUS This erratum will be fixed in a future BIOS revision 12 Unable to Define IDE Heads Value for Secondary IDE Hard Drive in BIOS Setup PROBLEM The Secondary IDE Master Slave Configuration Submenu in BIOS Setup does not display a field for the number of hard disk drive heads and has no value assigned for it in manual configuration mode IMPLICATION Since BIOS setup does not allow the user to define the number of hard disk heads thus the
12. AN430TX Motherboard Specification Update Release Date September 1998 Order Number 674301 016 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 this Specification Update 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 motherboard may contain design defects or errors known as errata which may cause the product to deviate from published specifications Current characterized errata are available on request Contact your local Intel sales office or your distributor to obtain the latest specifications before placing your product order Third party brand
13. Support for 233 MHz Pentium processors with MMX technology Support for 233 MHz Pentium processors with MMX technology is available in PBA revision 669379 304 680904 302 and higher Below are the jumper settings Processor Jumpers Jumpers Host Bus PCI Bus ISA Bus Bus Processor Freq MHz J9C1 C J9C1 D Freq MHz Freq MHz Freq MHz Freq Ratio NOTE There are no additional jumpering requirements for Pentium processors with MMX technology The 100 MHz Pentium processor and the 233 MHz Pentium processor with MMX technology have identical jumper settings The motherboard automatically detects which processor type is installed a AN430TX SPECIFICATION UPDATE intel ERRATA 1 System Does Not Meet FCC Class B with Unshielded USB Cables PROBLEM The motherboard will generate excessive electromagnetic radiation on unshielded USB cables even if no device or a low speed sub channel USB device is attached to the cable IMPLICATION The system will not meet FCC Part 15 Class B requirements when unshielded USB cable is used This is a violation of the USB v1 0 specification WORKAROUND Use USB devices with shielded cable that meet the requirements for high speed fully rated USB devices STATUS This erratum will not be fixed 2 Audio Driver Does Not Support Windows 3 x Session Within OS 2 Warp PROBLEM The AN430TX motherboard audio drivers for OS 2 Warp or Windows 3 x do not support audio during a Windows
14. TX SPECIFICATION UPDATE Once defined a user password can be cleared by either defining a new user password in BIOS Setup or by moving the Password Clear jumper J9C1 A on the motherboard See Section 1 13 2 Password Clear for more information on how to use this jumper 5 Power Supply Considerations The AN430TX motherboard has been designed to be configured in a system that uses a power supply that complies with the recommendations of ATX Specification Version 2 01 See Documentation Change 10 for the specific recommendations that must be met by a power supply for the motherboard 6 LS 120 Drive Configured as a Boot Device The second paragraph in Section 1 7 4 1 LS 120 Support will be replaced in its entirety as follows The 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 as a floppy device in the BIOS setup utility 7 Resource Allocation With All PCI Slots Used The BIOS assigns resources to PCI boot devices video cards and SCSI controllers for example during POST when Plug and Play is enabled in BIOS Setup PCI and ISA non boot devices network cards and audio for example will not have resources assigned by the BIOS during POST A Plug and Play operating system assigns resources to PCI and ISA non boot devices when it loads 6 Using Shift Print Screen in BIOS Setup In order to use the Shift Print Screen functi
15. d BIOS revision level must assume that all errata documented for that PBA and BIOS revision are present on all motherboards Specification Clarifications describe a specification in greater detail or further highlight a specification s impact to a complex design situation These clarifications will be incorporated in the next release of the specifications Documentation Changes include typos errors or omissions from the current published specifications These changes will be incorporated in the next release of the specifications vi Specification Update for AN430TX Motherboards a intel AN430TX SPECIFICATION UPDATE GENERAL INFORMATION Basic AN430TX Motherboard Identification Information tw Y rta RSE osm T un AA Revision PBA Revision Stepping BIOS Revision NOTES 1 The AA PBA number is found on a small label on the component side of the board 2 The 82430TX PClset kit used on this PBA revision consists of two different components as follows Stepping S Spec Numbers 82439TX A1 L238 82371AB o L23P 3 The following errata contained in the 82430TX PClset Specification Update Order Number 297736 either do not apply to the AN430TX motherboard or have been worked around in this PBA and or BIOS revision 1S 2S All other errata associated with the PClset apply to this PBA revision For specific details of any erratum please refer to the 82430TX PClset Specification Update 4 The following errata contained in the 823
16. es C omms Type Connguraton __Techrotoay Memory type size and speed can vary between sockets so EDO and SDRAM can be installed on the same motherboard 168 pin parity DIMMs can be installed but are not recommended for the following reasons e The motherboard does not provide parity checking or ECC Parity DIMMs cause excessive capacitive loading on memory data and address lines 18 a intel AN430TX SPECIFICATION UPDATE 2 Addition of Power On Section The following will be added to Section 1 11 2 Front Panel Connectors POWER ON This header must be connected to a front panel power switch The switch must pull the SW_ON pin to ground for at least 50 ms to signal the power supply to switch on or off The time requirement is due to the motherboard s internal debounce circuitry At least two seconds must pass before the motherboard will recognize another on off signal The system will turn on for 300 ms when AC power is first applied to the board A CAUTION If you need to turn off the computer during POST or because of a system lock up hold the power switch in for four seconds otherwise the computer will not switch off 3 Revision of Section 5 1 Specifications The following note will be added to the table entry for PCI compliance NOTE Certain optional PCI features have not been implemented on this motherboard see section 1 14 for more information 4 Revision of Section 1 7 1 82439TX System Controlle
17. es as noted This table uses the following notations CODES USED IN SUMMARY TABLE Doc Document change or update that will be implemented Fix This erratum is intended to be fixed in a future revision of the motherboard or BIOS Fixed This erratum has been previously fixed NoFix There are no plans to fix this erratum Shaded This erratum is either new or modified from the previous version of the document NO Pans ______SPEGIMICAMONGHANGEs no feas mm e Fr Hara ave not detected on boot user defined SSCS e Fres Poonia baten dra no AC powera Oooo o Frea 15 120 ave does not wori as expected in Windows 35 a intel AN430TX SPECIFICATION UPDATE CIO no Prans SPECIICAMONCLARIICATIONS 1 Doc Advanced Power Management APM will not function as expected with Universal Serial Bus USB enabled 8 Doc Ls 120 dive conigured as a ost device 8 Doe _ usnasnitprintsoreenmbiossep no PLANS DOCUMENTATION CHANGES Revision of Section 1 6 1 Main Memory Addition of Power On section Revision of Section 5 1 Specifications Revision of Section 1 7 1 82439TX System Controller MTXC le Doc Revision of Section 1 13 1 Processor Configuration J9C1 C D 8 Doc Revision of Section 1 8 1 Serial Ports 19 Doc Revision of Section 1 13 3 Clear CMOS J9C1 A Revision of Section 1 16 1 Power Supply Considerations Addition of BIOS Beep Codes section
18. gram An external coin cell battery powers the real time clock and CMOS memory When the computer is not plugged into a wall socket the battery has an estimated life of three years When the computer is plugged in the 3 3 V standby current from the power supply extends the life of the battery The clock is accurate to 13 minutes year at 25 C with 3 3 V applied 23
19. ion of Video Memory Address In Table 34 Memory Map the address ranges for Video memory and BIOS will be changed to 640K 812K decimal and A0000 CAFFF hex This will also change the ranges for Available High DOS memory to 812K 896K decimal and CBO00 DFFFF hex The following note will be added applicable to Video Memory and BIOS Note Applies only to boards with onboard video Video memory usage for other boards is determined by the add in video card 15 Change to Description of Manufacturing Options The following will be added as the first paragraph of Section 1 2 Motherboard Manufacturing Options The following are manufacturing options Not all manufacturing options are available in all marketing channels Please contact your Intel representative to determine what manufacturing options are available to you 16 Addition of Section Describing Real Time Clock The following will be added as Section 1 8 5 Following sections will be renumbered as necessary 1 8 5 Real Time Clock CMOS SRAM and Battery The real time clock is compatible with DS1287 and MC146818 components The clock provides a time of day clock and a multicentury calendar with alarm features and century rollover The real time clock supports 256 bytes of battery backed CMOS SRAM in two banks that are reserved for BIOS use The time date and CMOS values can be specified in the Setup program The CMOS values can be returned to their defaults by using the Setup pro
20. ler issues a beep code signifying the test point error writes the error to I O port 80h attempts to initialize the video and writes the error in the upper left corner of the screen using both mono and color adapters If POST completes normally the BIOS issues one short beep before passing control to the operating system Table 43 BIOS Beep Codes HEM MESA 332 ESTA NES MES eree paras EM EN 13 Revision of Section 3 1 4 PCI IDE Support This section will be replaced in its entirety as follows 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 tape drives and Ultra DMA drives see Section 5 1 for the supported version of ATAPI Add in ISA IDE controllers are not supported 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 22 a intel AN430TX SPECIFICATION UPDATE 14 Revis
21. 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 allow data transfers at speeds up to 115 2 Kbaud with BIOS serial port support 9 Revision of Section 1 13 3 Clear CMOS J9C1 A This section will be replaced in its entirety as follows Allows CMOS settings to be reset to default values by moving the jumper from pins 4 5 to pins 5 6 and turning the system on When the system reports that NVRAM cleared by jumper the system can be turned off and the jumper should be returned to the 4 5 position to restore normal operation Default is for this jumper to be on pins 4 5 Caution This procedure should only be done if after a BIOS update the system does not boot to a point where Setup can be entered or if after CMOS default settings have been restored from within the Setup program the system does not boot to the operating system 10 Revision of Section 1 16 1 Power Supply Considerations This section will be replaced in its entirety as follows For typical configurations the motherboard is designed to operate with at least a 200 W power supply see Section 5 1 for the specification A higher wattage power supply should be used for heavily loaded configurations The power supply must comply with the following recommendations found in the indicated sections of that specification e The potential relation between 3 3VDC and 5VDC power
22. move the EtherExpress Pro 100B memory range to D000 or higher in Windows 95 Device Manager STATUS This erratum was fixed in BIOS revision 4A3NTOX0 86A 0062 P06 6 Potential Battery Drain if No AC Power Applied PROBLEM A potential battery drain condition caused by the AC power loss recovery circuit can cause the battery to source approximately 500 uA current instead of the typical 3 uA drawn when the system is powered off This drain condition can occur if AC power is removed from the power supply and the front panel on off switch is depressed IMPLICATION The excessive battery drain state can result in a shortened battery life The battery will drain completely over a period of 3 to 4 weeks if left in this state Reapplying AC power eliminates the excessive battery drain condition A battery that has been completely drained will cause a CMOS checksum error to be displayed the next time that the system is powered on 11 a AN430TX SPECIFICATION UPDATE intel WORKAROUND None STATUS This erratum was fixed in PBA revision 669379 306 9 LS 120 Drive Does Not Work as Expected in Windows 95 PROBLEM After restarting Windows 95 from MS DOS mode the system BIOS does not configure the diskette parameter table correctly if an LS 120 drive is the only floppy drive in the system IMPLICATION Windows 95 will report the LS 120 drive as a hard drive instead of a floppy drive and will report a floppy drive available as Drive A If drive
23. on to print screens from BIOS Setup PnP OS must be set to no If PnP OS is set to yes in BIOS Setup the Shift Print Screen function will not work The BIOS does not assign resources to the parallel port when PnP OS is set to yes in BIOS Setup Resources for the parallel port will be allocated by the plug and play operating system when it loads If PnP OS is set to no the BIOS allocates resources to the parallel port 17 a AN430TX SPECIFICATION UPDATE intel DOCUMENTATION CHANGES The Documentation Changes listed in this section apply to the AN430TX Motherboard Technical Product Specification Order Number 282955 All Documentation Changes will be incorporated into a future version of the appropriate AN430TX motherboard documentation 1 Revision of Section 1 6 1 Main Memory This section will be replaced in its entirety as follows 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 128 MB for EDO memory and 256 MB SDRAM memory 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 gold plated contacts e 60 and 66 MHz bus speeds 60 ns 3 3 V EDO DRAM e Unrestricted CAS Latency 2 unbuffered 4 clock 3 3 V SDRAM e Caching for the first 64 MB of main memory e 64 bit data path e Single or double sided DIMMs in the following siz
24. r MTXC The fourth bullet in this section will be replaced in its entirety as follows e 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 transfers up to or greater than 100 MB sec Upto four PCI masters in addition to the PIIX4 5 Revision of Section 1 12 Add In Board Expansion Connectors The text in the first paragraph of this section will be replaced in its entirety as follows The motherboard Expansion Slots support up to four bus mastering PCI and up to three ISA add in boards One of the PCI slots may be shared with an ISA slot 6 Revision of Section 1 13 1 Processor Configuration J9C1 C D The following note will be added to the bottom of Table 30 in this section NOTE Pins 1 2 and 3 on Jumper J9C1 C are not used 19 a AN430TX SPECIFICATION UPDATE intel 7 Revision of Section 1 6 1 1 EDO DRAM The following will be added to the end of this section EDO DIMM should meet the Intel 60 ns 64 bit 3 3 V unbuffered EDO DIMM v1 2 specification A CAUTION Due to loading anomalies using EDO DIMMs with a n x 4 DRAM base in the AN430TX motherboard is not recommended For example a DIMM that uses sixteen 16 Mbit x 4 devices should not be used 8 Revision of Section 1 8 1 Serial Ports This section will be replaced in its entirety as follows The motherboard has one 9 pin D Sub serial port connector
25. s 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 5937 Denver CO 80217 9808 or call in North America 1 800 548 4725 Europe 44 0 1793 431 155 France 44 0 1793 421 777 Germany 44 0 1793 421 333 other Countries 708 296 9333 Copyright 1998 Intel Corporation CONTENTS REVISION HISTORY nA ii A A Adega a e ba diets i v RREFACE id vi Specification Update for AN430TX Motherboards GENERAL INFORMA TON a 3 SPECIFICATION CHANGES aaa 9 ERRATA ii A toh eae ded A tit 10 SPECIFICATION CLARIFICATIONS cooncccoccnccconaconcnncananncancnoncnn cnn anno nan cnn r nino narnia 16 DOCUMENTATION CHANGES nuuusunsussennnnnannnnnnnnnnnnnnnnnnannnnnnnnnnnnnannnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn 18 a intel AN430TX SPECIFICATION UPDATE REVISION HISTORY May 1997 001 This document is the first Specification Update for the Intel AN430TX motherboard June 1997 002 Added Specification Change 1 Specification Clarifications 1 3 and Documentation Changes 1 3 July 1997 003 Added Erratum 4 Specification Clarification 4 and Documentation Changes 4 9 August 1997 004 Updated Documentation Changes 1 and 7 8 Added Specification Clarification 5 and Documentation Change 10 September 1997 Updated Documentation Change 10 Added Errata 5 and 6 October
26. t enabled in BIOS Setup if needed Notes on using USB legacy support e If USB legacy support is enabled don t mix USB and PS 2 keyboards and mice For example do not use a PS 2 keyboard with a USB mouse or a USB keyboard and a PS 2 mouse e Do not use USB devices with an operating system that does not support USB USB legacy is not intended to support the use of USB devices in a non USB operating system e USB legacy support is for keyboards and mice only Hubs and other USB devices are not supported 12 Addition of BIOS Beep Codes Section The following will be added after Section 4 2 Remaining tables will be renumbered accordingly BIOS BEEP CODES Whenever a recoverable error occurs during Power On Self Test POST the BIOS displays an error message describing the problem The BIOS also issues a beep code one long tone followed by two short tones during POST if the video configuration fails no card installed or faulty or if an external ROM module does not properly checksum to zero An external ROM module e g video BIOS can also issue audible errors usually consisting of one long tone followed by a series of short tones For more information on the beep codes issued check the documentation for that external device 21 a AN430TX SPECIFICATION UPDATE intel There are several POST routines that issue a POST Terminal Error and shut down the system if they fail Before shutting down the system the terminal error hand
27. that any processor errata for a given stepping are applicable to the Printed Board Assembly PBA revision s associated with that stepping Refer to the 82430TX PClset Specification Update Order Number 297736 for specification updates concerning the 82430TX PClset Items contained in the 82430TX PClset Specification Update that either do not apply to the AN430TX motherboard or have been worked around are noted in this document Otherwise it should be assumed that any PClset errata for a given stepping are applicable to the Printed Board Assembly PBA revision s associated with that stepping Refer to the 82371AB PIIX4 Specification Update Order Number 297738 for specification updates concerning the 82371AB PIIX4 Items contained in the 82371AB PIIX4 Specification Update that either do not apply to the AN430TX motherboard or have been worked around are noted in this document Otherwise it should be assumed that any PClset errata for a given stepping are applicable to the Printed Board Assembly PBA revision s associated with that stepping Nomenclature Specification Changes are modifications to the current published specifications These changes will be incorporated in the next release of the specifications Errata are design defects or errors Characterized errata may cause the AN430TX motherboard s behavior to deviate from published specifications Hardware and software designed to be used with any given Printed Board Assembly PBA an
28. the system BIOS does not attempt to boot from any additional boot devices specified in the BIOS Setup program IMPLICATION If Network boot is selected as the first boot device the system will hang WORKAROUND Remove Network boot from the boot sequence STATUS This erratum was fixed in BIOS revision 4A3NT0X0 86A 0082 P07 18 Unattended Start Feature Does Not Require Password Before Boot PROBLEM The Unattended Start feature at power on allows the system to boot without any password being entered at the keyboard even though a user or administrator password has been set in the BIOS Setup program IMPLICATION A system that is booted without an operator in attendance could be vulnerable to unauthorized access WORKAROUND None STATUS This erratum was fixed in BIOS revision 4A3NTOX0 86A 0086 P08 19 System BIOS Does Not Display User Logo During POST PROBLEM The status bit that allows display of a user logo during the POST process is disabled in some versions of the BIOS IMPLICATIONS If a user logo has been defined and loaded in the user logo flash memory area it will not be displayed This erratum only affects BIOS versions 4A3NT0X0 86A 0082 P07 and later WORKAROUND None STATUS This erratum was fixed in BIOS revision 4A3NT0X0 86A 0088 P09 20 System Using 3 Mode Floppy Drive Cannot Read XDF Format Diskettes PROBLEM The buffer area that stores floppy drive parameters does not have room to store the speed information
29. to allow a 3 mode floppy drive to read a diskette in the XDF format IMPLICATION A system that has a 3 mode floppy drive cannot be used to install a program or operating system such as PC DOS 7 0 that is distributed on XDF format diskettes WORKAROUND None STATUS This erratum will not be fixed 14 a intel AN430TX SPECIFICATION UPDATE 21 System Will Not Boot From ISA Video Adapter if Scan User Flash is Enabled PROBLEM If the option to scan the user flash area during the boot process is enabled in the BIOS setup program the system will hang when the BIOS attempts to initialize an ISA video adapter This erratum does not affect PCI video adapters IMPLICATION A user who requires an ISA video adapter will not be able to use the scan user flash area option WORKAROUND None STATUS This erratum will not be fixed 15 a AN430TX SPECIFICATION UPDATE intel SPECIFICATION CLARIFICATIONS The Specification Clarifications listed in this section apply to the AN430TX Motherboard Technical Product Specification Order Number 282955 All Specification Clarifications will be incorporated into a future version of that specification 1 Advanced Power Management APM Will Not Function as Expected with Universal Serial Bus USB Enabled The following will be added to Section 1 7 3 Universal Serial Bus and Section 3 1 8 Advanced Power Management Advanced Power Management will not function as expected when a USB keyboard
30. uption or no video on boot 10 a intel AN430TX SPECIFICATION UPDATE WORKAROUND Use a power supply that meets the recommendation in the 2 01 ATX Specification STATUS This erratum will not be fixed 5 Memory Decrease Warning Message Not Displayed PROBLEM During POST the BIOS will not generate and display a memory decrease warning message on the screen IMPLICATION The user will not be warned about a decrease in the amount of memory WORKAROUND None STATUS This erratum was fixed in BIOS revision 4A3NT0X0 86A 0082 P07 6 Hard Drive Not Detected on Boot if User Defined PROBLEM If the drive type in BIOS Setup is set to USER the hard drive will not be detected by the motherboard at boot IMPLICATION The hard drive will not be detected by the BIOS during the boot process and will not be available to the operating system WORKAROUND None STATUS This erratum will be fixed in a future BIOS revision 7 Intel EtherExpress Pro 100B Fails to Initialize With Windows 95 PROBLEM The system BIOS allocates 48 KB of memory at location COOOH 0 rather than 44 KB as expected IMPLICATION Since the EtherExpress Pro 100B attempts to map memory starting at location CBOOH 0 by default this results in a resource conflict with the system BIOS Therefore Windows 95 will be unable to initialize the EtherExpress Pro 100B and an exclamation mark will be displayed in Device Manager for this device WORKAROUND Manually
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