Zipped BIOS image tied to platform code GH4FT, version 1.09, about 6 MB compressed. GH4FT also appears with Compal board LA-K281P elsewhere in this collection, but this file itself states no board number or brand. Extract it and confirm the binary size before writing it to the SPI flash with a programmer. Make a full backup of the existing chip first. Check that the board and platform code match your unit, because a mismatched image can brick the machine.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @vinafix_bios. Enginerys does not host this file.
How to open a .zip file
Compressed archive that every operating system opens without extra software.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →