BIOS and KBC firmware for a board marked BM5387 revision 1.2, in a RAR archive of 2.44 MB. KBC refers to the keyboard controller, the embedded controller that handles power-on, charging and keyboard functions. The name gives no brand or model, so identify the board by the number on the PCB. Both images are meant for flashing with an external programmer to recover a dead or bricked board. Make a backup of each original chip first and confirm file sizes match the flash capacity.
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 →