BIOS package for the ASRock B85 Anniversary desktop motherboard, built on Intel's B85 chipset, compressed as RAR at about 8.9 MB. The name gives no version number, so check the contents after extracting to see whether it is a vendor update file or a raw chip dump. A vendor update can be installed with ASRock's own flashing tools. A raw dump has to be written to the SPI chip with a programmer, and the existing chip should be read and saved first. Make sure the image size matches the chip.
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 →