project for compatible card with marlin 32bit and arduino due 

features: 
- ATX power supply with option external 24v 
- connectors X, Y, Z 
- connectors ENDSTOP MIN MAX X Y Z 
- connectors 4 SERVO 
- switch servo voltage 5v/12v 
- 6 mosfet pwm 
- 8 extruders outputs 
- connectors for external leds 
- standard connectors for Full Graphic Smart Controller 
- option module for bluetooth HC-06 
- option module for ESP8266 set to 250.000 baud with transparent bridge 
- eprom 256k / 512k on DIP 
- connectors I2C 
- connectors serial port 
- connectors cantx canrx with pin dac1 and dac2 

UPDATE license lets others remix, tweak, and build upon your work even for commercial purposes!

firmware beta

https://github.com/MKFirmware/MK4duo