Raw 8 MB BIOS image for a Lenovo board NM-B244, marked as tested, provided as a plain bin file ready for a programmer. NM-xxxx numbering is used by LCFC, Lenovo's own ODM. The size suits an 8 MB, 64 Mbit SPI flash chip, which you write with a CH341A or similar tool after reading and saving the original contents, since those may hold serial and product data. Check that the board number on the PCB is NM-B244 and that the fitted chip is 8 MB before writing.
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 @ITHINKHS. Enginerys does not host this file.
How to open a .bin file
A raw, byte-for-byte image of a flash chip: the main BIOS / UEFI, the embedded-controller (EC) firmware, or both.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →