Third copy of the ASUS K53S BIOS for the K53SV board revision 3.1, described in the name as fully working. It is 4 MB, matching a 32 Mbit SPI chip. Duplicates are handy for checksum comparison so a technician can confirm the dump is consistent before relying on it. Flash with a CH341A or comparable programmer, but first save the original chip contents, and only use it on a board whose silkscreen shows revision 3.1.
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 @abgm_manutencao_bios. Enginerys does not host this file.
How to open a .bin file
A raw, byte-for-byte image of a flash chip: the main BIOS / UEFI, the embedded-controller (EC) firmware, or both.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →