RAR archive of 416 KB containing BIOS firmware labelled K21 PDC. The name provides no brand, board revision or flash type. PDC may indicate a Pentium Dual-Core build, but this is not stated outright. After extraction, technicians usually check the binary against the flash chip capacity and then write it with a programmer to revive a board that no longer posts. Make a verified backup of the current chip contents first and confirm the model identifier on the machine corresponds to K21.
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 →