BIOS package for a board code-named PLANO BSW, carrying the Wistron-style board number 13329-1 and the DDTTT marking. Wistron prints a five-digit project number with a dash suffix on its PCBs, so check that code on your board before flashing. BSW most likely means Braswell, but the name does not confirm the CPU. The 5.14 MB archive is meant for SPI flash recovery with a programmer. Read and keep the original firmware first, and make sure the image size matches the chip.
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 @afsbiosfree. Enginerys does not host this file.
How to open a .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →