Vecna's actually adding documentation now.
A lot of the reason I haven't personally added docs to functions is that there are a lot of functions I personally haven't used yet (file IO being a very good example). I was hoping vecna and zeromus would be quicker in adding documentation, but alas, nobody likes writing.
However, vecna's writing up a buncha stuff on the map/system vc code section.
And, for your edification, the scan codes are indeed not ASCII, but I believe they're the standard keyboard scan codes. Also, the Color Filter defines are used by, oddly enough,
ColorFilter().