An extruder is provided having a transfer region that, in an extruder sleeve, is provided with ribs between which extend flow channels. The least significant bit of the index word specifies the command and the remainder of the index word specifies the register address. An available slot in the data structure is used to store a pointer associated with a function. The motor is configured to rotate the pulse hammer. The electronic control unit can control machines of the paving system based on comparing actual data with model predicted data, and can further update either or both of a plan for paving a work area and the positional temperature model itself based on differences between actual data and model predicted data.