BIOS image for the MSI B450M Mortar motherboard, model code MS-7B89, intended for a 16 MB flash chip and delivered as a 9.25 MB zip archive. The stated 16 MB matches a 128 Mbit SPI device, so the extracted file should be exactly that size before it is written. Such a dump is used to revive a board after a failed update or a corrupted firmware region, programmed directly with an external programmer. Read and keep the original chip contents first, and confirm the MS-7B89 code and revision printed on the PCB.
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 .zip file
Compressed archive that every operating system opens without extra software.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →