BIOS image for a board identified only as PA_HM65, which points to the Intel HM65 chipset, version V5.21, with a 4MB flash size in the name; the RAR archive is 3.02 MB. The maker and laptop model are not stated, so identify the board from its PCB markings first. Dumps like this are written to the SPI chip with an external programmer to repair a bricked BIOS. Read and store the original chip contents, confirm the chip is 4MB, and compare any board numbers before writing.
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 →