Archive holding BIOS firmware for the Acer Aspire One AO521 netbook, 602 KB in RAR form. The name gives no motherboard number or firmware version. Extract it and check whether it contains a raw dump or update tools before use. A raw image goes onto the SPI flash with a hardware programmer when the machine has power but no POST or video. Make sure the extracted file size matches the chip capacity, check the board marking against your unit, and keep a backup of the existing chip contents.
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 @ComputerBIOSBinFile. 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 →