Firmware package for the ASUS PRIME J4005I-C mini-ITX motherboard, supplied as an 18.5 MB RAR archive; the name spells BIOS as BOS but the content is BIOS firmware. No revision or version is stated, so compare it with what the board needs before use. A dump like this is used to recover a board that fails to POST after a bad update, by programming the SPI chip directly. Check the archive for the image size matching the flash capacity, and read and keep the original chip contents first.
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 .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 →