HP laptop firmware set for board DAU88MMB6A0, revision A, containing both BIOS and EC images in a 2.97 MB RAR archive. Board numbers starting with DA and ending in MB plus a revision code follow the Quanta ODM pattern, which HP uses widely. The BIOS goes to the SPI flash and the EC firmware to the embedded controller or its own flash, which helps when a board has no power or charging problems. Dump the original chips before programming. Match the board number and revision on the PCB first.
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 .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →