An archive of repair files (board 12209-1). Shared as “b95=lb59a mb=12209-1 48 (1).4xb01.011.rar” — a .rar file, 3.16 MB.
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 @one5technology. 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.
7-ZipWinRARThe Unarchiver (macOS)