Phitronics H55-M motherboard BIOS, supplied as a 711 KB RAR archive, intended for boards based on the Intel H55 desktop chipset. The name gives no BIOS version or PCB revision, so compare the board silkscreen and any version information inside the archive before writing it. Such dumps are used to recover a board that is dead after a failed update or with a corrupted firmware chip, flashed with a programmer like a CH341A. Always dump the current chip contents first and check that the file size equals the flash capacity.
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 →