This is the RepRapPro version of Marlin. http://reprappro.com Modifications mainly be Jean-Marc and Adrian The core Marlin code in the Marlin directory is stable and is our standard release firmware for all RepRapPro RepRap machines. For instructions see: RepRapPro Mendel: http://reprap.org/wiki/RepRapPro_Mendel_maintenance RepRapPro Huxley: http://reprap.org/wiki/RepRapPro_Huxley_maintenance Code in the Slave directory is under development. This will drive a slave controller (with the core Marlin code on the master controller) to control multiple extruders.