High Quality Content by WIKIPEDIA articles! The XBC, or the Xport Botball Controller, is a robot based on Charmed Labs` Xport hardware. It was built specifically for the Botball competition and uses a Game Boy Advance for its display and for high-level processing; a Field-Programmable Gate Array is used to offload low-level processing of motors and sensors from the Game Boy Advance. The XBC is programmed using Interactive C, which is a variant of the C programming language. The XBC replaced the RCX in 2005 as Botball`s official processor. The RCX can be programmed using Interactive C, Not Quite C, or Lego`s simple GUI interface. Both robots can have bases built with Lego pieces.