Firmware archive for a board identified as NB2772 PCB MB version 4.1, holding two images according to the name: a 16MB dump and a 1MB dump. On many laptops a 16MB image belongs to the main SPI BIOS chip while a 1MB file usually serves a separate EC or auxiliary flash, but confirm by opening the archive. Before programming with a CH341A or similar tool, read and save the original chip contents, check that the PCB marking matches V4.1, and make sure each image size equals the capacity of the target chip.
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 →