It's trivial in terms of how much documentation there is. Pinouts and dimensions are basically a given in any mobo manual. From that perspective they are just on par with the other SBCs out there. Here's a random example to compare to...
The comment may also be referencing the original IBM PC manuals, up until the AT, which contained far more information, including schematics and even BIOS source code listings.
http://advdownload.advantech.com/productfile/Downloadfile4/1...
The comment may also be referencing the original IBM PC manuals, up until the AT, which contained far more information, including schematics and even BIOS source code listings.