Lenovo BIOS package of 25.9 MB in ZIP form covering ThinkCentre desktops on the Intel B150 chipset, naming the M900x and the M700 Tiny. Archives of this size often hold an official update with flashing utilities rather than a raw chip dump, so inspect the contents before use. Vendor update tools run from the operating system or a boot drive, while a raw image needs an SPI programmer. Confirm the machine type matches, and back up the current flash if writing directly to the 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 .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 →