Working BIOS for a Lenovo M5800 desktop built on an A75M board, version 1.0, packaged as RAR. The A75M name indicates an AMD A75 chipset motherboard. Such an image is written to the SPI flash with an external programmer to revive a machine with corrupted firmware or after replacing the chip. Read and save the existing contents first, since it may hold system specific data, check that the board marking and version match, and make sure the image size fits the flash chip exactly.
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 →