Melzi board (ATmega 1284P) + LCD12864 + Marlin: is it possibile?

Hello! Actually I have a melzi board with atmega1284p and a lcd 2004 (the 5 button ones without the SD) with Marlin, I'd like to change the LCD with the LCD 12864, do you have any links or suggestions to the pinout or the changes to do into Marlin FW?

Thank you for any help!