Please follow the steps below carefully for AMIBIOS support. Use the AMIBIOS Checkpoint and beep Codes to aid in problems that occur during the pre-boot process. Use the AMIBIOS Flash Utility if you are flashing an AMIBIOS that is using core 6.31 or earlier.

Identify your motherboard

To identify your motherboard, you may either run the AMT Motherboard Identification Utilityor you may view the BIOS string on bootup.

  •     Turn the system power off.
  •     Unplug your keyboard or hold down one of the keys on the keyboard.
  •     Power-on the system (you should get a keyboard error).
  •     Notice the long string of numbers in the lower left hand corner of your screen. This is your BIOS identification string. It will look like one of these:

BIOS from 1991 - Present


This indicates a motherboard with BIOS from 1991 to the present.

If the next to the last set of BOLD letters is:

AMT - it is a TRUE AMT motherboard - the numbers that follow are the motherboard series number - i.e. S875 is a Series 875 motherboard

From 1986 - 1990

DINT- 1123-04990-K8

This indicates a motherboard with BIOS from 1986 - 1990.The BIOS identification number for this BIOS identification string, which is in BOLD and is in the first set of numbers, would be 1123.

If the first BOLD number of the first set of numbers in BIOS from 1986 - 1990 is:

  •     1, 2, 8, or a letter - it is a NON-AMT Taiwanese manufactured motherboard
  •     3, 4, or 5 - it is a TRUE AMT motherboard
  •     50 or 6 - it is a NON-AMT US made motherboard
  •     9 - it is an evaluation BIOS for a Taiwanese manufacturer

NOTE: If you have an identification number that corresponds to a NON-AMT motherboard you will need to contact the company or person who sold you the product.

Go to your motherboard manufacturer for support.

We do not have your BIOS upgrade. Only your motherboard manufacturer can give you this upgrade. Most manufacturers have BIOS upgrades available on their website. If you can't determine your motherboard manufacturer, contact the company or person who sold you the product.

AFUDOS v4.xx

AFUDOS is a BIOS update utility, also referred to as a "BIOS flash utility", with a command line interface for MS-DOS

# The target board MUST use AMIBIOS Core 7.xx or AMIBIOS8 # Older AMIBIOS systems support the AMIFLASH.COM program. This utility offers the following features:

  •     Small executable file size
  •     Quickly update
  •     Clear updating information and status
  •     Fully compatible with previous version (See Appendix B AFUDOS v3.xx Commands)

Supported Operating System

  •     DOS environment (MS-DOS, FreeDOS, ...)

Getting Started:

Copy the AFUDOS.EXE executable file to any storage location accessible by the host system and then run AFUDOS in command prompt.

Basic Usage:


  •     Program main BIOS image, reset CMOS to defaults


  •     Program main BIOS image & bootblock image
  •     Reset CMOS and NVRAM to defaults

AFUWIN v4.xx

AFUWIN is an updating system BIOS utility with command line and GUI interface

  •     It has same command line parameters and behavior as AFUDOS plus a simple graphical interface
  •     The target board MUST use AMIBIOS Core 7.xx or AMIBIOS8
  •     Older AMIBIOS systems support the AMIFLASH.COM program, which works in MS-DOS

AFUWIN Utility is supported in following operating systems:

  •     Microsoft Windows 98
  •     Microsoft Windows ME
  •     Microsoft Windows 2000 (32bit & 64bit editions)
  •     Microsoft Windows NT 4.0
  •     Microsoft Windows XP/XP64
  •     Microsoft Windows PE
  •     Microsoft Windows Vista (32bit & 64bit editions)

Operating System Driver Requirements:

  •     UCOREVXD.VXD Driver for Microsoft Windows 98/ME
  •     UCORESYS.SYS Driver for Microsoft Windows NT/2000/XP/PE/Vista (32bit)
  •     UCOREW64.SYS Driver for Microsoft Windows XP64 & Vista (64bit)

Getting Started:

Copy AFUWIN.EXE, UCOREVXD.VXD, UCORESYS.SYS and UCOREW64.SYS to any storage location accessible by the host system and then run AFUWIN in command prompt

  •     Remember that three files MUST be in same directory
  •     For launching GUI mode, just double-click on AFUWIN.EXE
  •     TO use in command line mode, run AFUWIN.EXE from a Microsoft Windows command prompt.

Note: Many of the Usage & Example for the command line mode (AFUDOS & AFUWIN) are advanced and can harm your system if used incorrectly.