That info is in the AmigaDOS Reference manual published by Bantam during Commodore days.
NOT an exciting read, but handy for that sort of info. It might also be in the Guru book by Ralph Babel (but I have not read it, so don't know for sure).
I think there is an online version of the AmigaDOS manual floating around although I don't know how legal it is (I own a copy by the way, no flames please!).
