BIOS for the MSI Z87-S01 motherboard, revision 2.1, known internally by the MSI number MS-7850, packed as an 8.94 MB RAR. MSI prints its MS-xxxx code on the PCB, which is the reliable way to identify the board, as OEM retail names vary. The Z87 chipset places this board on the Intel Haswell platform. Use the image to reflash the SPI chip when the board will not post; check the MS-7850 and revision marking, save the original contents and confirm the image size fits.
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 →