Second copy, marked (2), of the 4540s O firmware image, 8 MB in binary format. The name has no board number, version or ME status, and the meaning of O is not stated. Keeping two reads lets you compare them byte for byte and spot a bad read from a weak clip connection. Use it to restore a dead or bricked BIOS chip with an SPI programmer. Erase and verify after writing, keep your own backup of the original chip, and confirm the target is a 64 Mbit flash on the same model of board.
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 @biosfilebins. 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 →