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.
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CONTENTS REVISION HISTORY ...............................................................................................................................v PREFACE ............................................................................................................................................... vi Specification Update for AN430TX Motherboards GENERAL INFORMATION ......................................................................................................................
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AN430TX SPECIFICATION UPDATE REVISION HISTORY Date of Revision Version Description 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.
AN430TX SPECIFICATION UPDATE 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.
Specification Update for AN430TX Motherboards
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AN430TX SPECIFICATION UPDATE GENERAL INFORMATION Basic AN430TX Motherboard Identification Information AA Revision PBA Revision 82430TX PCIset Stepping BIOS Revision Notes 672839-304 669379-304 A1 4A3NT0X0.86A.0042.P02 1, 2, 3, 4, 5 672839-305 669379-305 A1 4A3NT0X0.86A.0047.P03 1, 2, 3, 4, 5 672839-306 669379-306 A1 4A3NT0X0.86A.0047.P03 1, 2, 3, 4, 5 672839-307 669379-307 A1 4A3NT0X0.86A.0047.P03 1, 2, 3, 4, 5 672839-308 669379-308 A1 4A3NT0X0.86A.0062.
AN430TX SPECIFICATION UPDATE 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 changes as noted.
AN430TX SPECIFICATION UPDATE NO. PLANS ERRATA 20 NoFix System using 3-mode floppy drive cannot read XDF format diskettes 21 NoFix System will not boot from ISA video adapter if Scan User Flash is enabled NO. PLANS 1 Doc Advanced Power Management (APM) will not function as expected with Universal Serial Bus (USB) enabled SPECIFICATION CLARIFICATIONS 2 Doc LS-120 drive and floppy will not function as expected for BIOS recovery 3 Doc PCI 2.
AN430TX SPECIFICATION UPDATE 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.
AN430TX SPECIFICATION UPDATE PBA Revision 669379-308 669379-309 680904-302 680904-303 BIOS Revision Errata That Apply ‡ 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, 10-11, 14-15, 17-18, 2021 4A3NT0X0.86A.0082.P07 1-2, 6, 8, 10-11, 14-16, 18-21 4A3NT0X0.86A.0086.P08 1-2, 6, 8, 10-11, 14-16, 19-21 4A3NT0X0.86A.0088.P09 1-2, 6, 8, 10-11, 14-15, 20-21 4A3NT0X0.86A.0042.P02 ‡ 1-3, 5-15, 17-18, 20-21 4A3NT0X0.86A.0047.
AN430TX SPECIFICATION UPDATE PBA Revision 680904-304 680904-305 BIOS Revision 4A3NT0X0.86A.0042.P02 Errata That Apply ‡ 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 4A3NT0X0.86A.0082.P07 1-2, 4, 6, 10-11, 14-16, 18-21 4A3NT0X0.86A.0086.P08 1-2, 4, 6, 10-11, 14-16, 19-21 4A3NT0X0.86A.0088.P09 1-2, 4, 6, 10-11, 14-15, 20-21 4A3NT0X0.86A.0042.P02‡ 1-7, 9-15, 17-18, 20-21 4A3NT0X0.86A.0047.
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. 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.
AN430TX SPECIFICATION UPDATE 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.
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.
AN430TX SPECIFICATION UPDATE 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.
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.
AN430TX SPECIFICATION UPDATE 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, 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.
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.
AN430TX SPECIFICATION UPDATE 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.
AN430TX 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.
AN430TX SPECIFICATION UPDATE 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.
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.
AN430TX SPECIFICATION UPDATE 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. 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.
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.
AN430TX SPECIFICATION UPDATE 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 handler 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).
AN430TX SPECIFICATION UPDATE 14. Revision 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 CB000-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.
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