BIOS and keyboard EC firmware for an all-in-one PC on the MS-AAC11 board, revision 1.0, packed in a RAR archive. The MS- prefix follows MSI's board numbering. The archive is meant to hold both the main system BIOS and the KBEC image, which runs keyboard, power and battery management. These are typically written with an SPI programmer to recover a unit that is dead or stuck after a failed update. Dump and keep the existing chip contents before writing, and check that the board revision matches.
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 →