Resets the control registers of the Processor_(PC_, ECR_ and SP_)

def reset(self):
		"""
		Resets the control registers of the Processor_(PC_, ECR_ and SP_)
		"""
		rom = self.memory_bus.devices[0]
		if(self.memory_bus.device_count() > 1):
			ram = self.memory_bus.devices[1]
			self._set_sp(rom.size + ram.size - 1)
		self._set_pc(0)
		self._set_ecr(0)
		self.cycles = 0