Compressed BIOS file for a desktop motherboard labelled p4m900t-m2, a name pointing to a VIA P4M900-based board, though the archive itself states nothing more. The RAR is 387 KB and probably contains one flash image. Such dumps serve to revive boards with a corrupted BIOS by reprogramming the flash chip out of circuit or through a clip. Before writing, dump the original contents as a fallback, compare the chip capacity with the image size, and make sure the board model and revision on the PCB agree with this file.
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 @afsbiosfree. 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 →