Package holding BIOS plus EC firmware for the P15xSMA platform at version B0311, a later release than B0302 by its number. Both images in one ZIP of 3.18 MB make it possible to restore the system flash and the embedded controller as a consistent pair, which matters when charging, keyboard or power-on logic misbehaves. Before writing, read and store the current chip contents, compare the dump size with the flash capacity, and confirm the board actually carries the P15xSMA designation rather than a similar variant.
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 →