Backup read of the BIOS chip from an ASUS K43S laptop, saved as a 4.00 MB raw binary that matches a 32 Mbit SPI flash. Being a backup, it likely contains the full chip image from a single unit, including its own serial and configuration areas. Technicians write such a file with a programmer like a CH341A or RT809 to revive boards with corrupted firmware. Check that your board revision matches and that the chip is 4 MB, and keep a copy of your own chip contents before overwriting it.
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 @biosarchive. 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 →