MSI notebook BIOS in a RAR archive for mainboard MS-15441, version 1.0, with a 32 MB image matching a 256 Mbit SPI flash. The MS- prefix is MSI's own board numbering, where the first digits mark the model family and the last one the board variant. Technicians program such dumps with a CH341A, RT809H or similar tool to revive boards with corrupted firmware. Verify the PCB marking and the flash size, and keep a read of the original chip before erasing 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 .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 →