BIOS firmware for the ASUS Eee PC 1215B netbook, board revision 2.2 according to the name, supplied as a RAR archive. Such a dump is used to restore a corrupted SPI flash on boards stuck with no display, no POST or a boot loop, usually with an external programmer and clip or after desoldering the chip. Check that the revision silkscreened on your mainboard is 2.2, save a copy of the original chip contents first, and make sure the image size matches the flash chip's capacity before writing.
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 →