Firmware for the Lenovo ThinkPad T450 with platform code AIMT1 on LCFC board NM-A301. LCFC, Lenovo's own manufacturing arm, uses NM-xxxx numbers on its motherboards, so confirm that marking on the PCB. The ZIP likely holds the SPI flash image used to revive a board after a failed update or corruption. Flash it with a hardware programmer only after saving the original dump, since it contains machine-specific serial data, and make sure the image size matches the chip capacity.
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 →