Creality Ender-2 Controller Board (Labeled)

This is the PCB from my Creality Ender-2 circa January 2018. It is based on the ATMega1284P with a 16MHz crystal. I have added labels for all the connectors as well as inserting better captures of the top of each of the four main ICs in the picture of the top side of the PCB. The board is 100mm long by 75mm wide. I believe that for firmware purposes this board may be equivalent to the "Melzi (Creality)" as used in the CR-10 (or at least a kissing cousin). The closest match I have found is the fi