A schematic diagram for ECS hardware. Shared as “BIOSTAR_A78XC-A2S(A770E)-V6.3(RTM880N-793)-0824-PDF.rar” — a .rar file, 1.89 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 @alischematics. 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)