Archive containing the HxD hex editor, a 1.92 MB RAR. HxD is a free Windows hex editor widely used in board repair to inspect BIOS and EC dumps, compare files byte by byte, check that an image is not blank or filled with FF, and edit serial numbers, MAC addresses or other data blocks in a firmware file. It also opens disks and RAM. Always work on a copy of a dump rather than the only backup, and verify file size is unchanged after editing before flashing.
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 @laptop_bios_schematic. 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)