Combined BIOS and EC firmware for a Lenovo A78M_V1 board, with the name pointing to a 1MB image. An AMD A78 chipset is likely behind the A78M naming, though the file itself confirms only the board label. The 2.71 MB RAR archive should be unpacked and the contents checked against the flash chip on the board, since a 1MB dump only fits a chip of matching capacity. Back up the existing chip with an SPI programmer before flashing, and verify the board silkscreen matches V1.
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 →