Thunder HEsl (S2567) BIOS

  Current BIOS Revisions

For new BIOS versions (v1.05a or above)


Boot Disk - Refers to either a Windows 95 or Windows 98 boot disk. Any other type of boot disk might load memory resident programs which will interfer with the flash process. Make sure you hit the F5 key when the boot disk first starts running to make sure no other programs are loaded in the back ground without your knowledge.

Bios Flash Package -  Unzip the entire bios package to a seperate clean floppy.  Insure there are 3 files that are unpacked during the unzip process


Two separate diskettes are needed. The first diskette is the Windows 95/98 Boot Disk. The second diskette should contain the 3 files needed to flash the bios.  These files are provided when you unzip the bios flash package from the website.


At the A: prompt simply type in "
flash" and the rest will be handled by the files included in your download.

For previous BIOS versions (below v1.05a)

Important Note:

If your BIOS chip has part number
SST 28SF040A - image DO NOT flash the chip with BIOS versions below V.1.03; otherwise, this would render your system inoperable.


Add switch /c (clear CMOS) and switch /b (update boot block) when update to this BIOS: AMIFLASH 2567V103.ROM
* /c /b  If you do not use the switch /c, you will be forced to clear CMOS.






TYAN THUNDER HEsl (S2567)  V.1.05a  0928011030
New Features and Fixes :
Fix AGP problem with Win2K, Enable VGA Cycle Timing.



TYAN THUNDER HEsl (S2567)  V.1.05  0613011830
New Features and Fixes :
Add CPU ID 68A microcode, add Power Fail recovery support, add Console support to COM2, and chipset Regs program update.

Note: If you do not wish to use "go.bat" file, you MUST use the switches /b/c. If neither methods is used, BIOS will not work properly.

Note: If you are upgrading to BIOS v1.05, then download the 2567v105.exe and extract it to a clean, formatted floppy diskette.  Boot from a Windows 9x floppy and once boot-up is completed, put the diskette with the BIOS ROM file into your floppy drive and type "GO".  This will start the flash process for you.  From there, follow the onscreen prompts.



TYAN THUNDER HEsl (S2567)  V.1.04
New Features and Fixes :
New Console Redirect, fix for AMI Raid card support, and add new flash part.



TYAN THUNDER HEsl (S2567)  V.1.03
New Features and Fixes :
Add HM monitor, add support for non-BBS compliance SCSI/Raid card, and add new flash part support.



Get the latest flash utilities here: Flash Utility

Information published on is subject to change without notice.
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