Archive for the ECS P13G+ motherboard, revision 1.0, in RAR format at 974 KB. Note the plus suffix: this is a separate model from the plain P13G, so do not mix up documentation between the two. The name says nothing about the contents, which should be checked after extraction. Schematic material is useful for tracing power rails, identifying test points and finding faulty MOSFETs or capacitors, while a BIOS dump is reflashed with a programmer after backing up the existing chip.
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 @IT_SERVICE_WORLD. 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.