Firmware image for the HP EliteBook 840 marked 128, a 16.0 MB raw dump intended for a 128-Mbit flash device. No generation, revision or Management Engine information appears in the name, and there is no file extension. It is used to reprogram the main BIOS chip with a CH341A or similar SPI programmer. Since this model has several board versions with different chip layouts, compare the PCB number and chip markings first, and read out the original contents before erasing anything.
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 @biosfilebins. Enginerys does not host this file.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →