At the top of the EasyC window, there should be three boxes labeled “L1”, “L2” and “Pro”. If you change this from “L1” to “L2” or “Pro”, you will have the option for four wheel drive.
And if you don’t have the programming kit…
With 4 motors you have 2 options:
- Use a splitter to hook both motors to the same port in ports 1 and 2.
- Use ports 7 and 8 which should be pair with ports 1 and 2.
Fiddle with servo reversing and stuff like that on the controller (or in software if you can program your stuff).
i would like to point out this page (pages D7 on are really helpful for this situation) it is incredibly helpful until you get you hands on a programming kit or if you just don’t want/need to program the robot.
http://www.vexrobotics.com/docs/inventors-guide/main-2008/12-d-control-configurations-06272008.pdf