BIOS for an H81-M1 motherboard, provided as a 3.05 MB RAR, with no brand stated in the name. H81-M1 is a board model used in Acer desktops built on the Intel H81 chipset, but confirm the exact model on your PCB. Such an image is written to the SPI flash with a programmer when the system no longer boots after corruption. Save a copy of the current chip before writing, and check that the extracted file size matches the flash capacity, because a mismatched image will not fit.
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 →