Command:
    speed = GetSpeed

  Description:
    Get the current speed slider position and place the result in  "speed".
    The result is a signed integer.

  Input:
    None

  Result:
    speed - the current speed

 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

  Command:
    SetSpeed speed

  Description:
    Set the speed to "speed". "Speed"  can  range  from  -111  to  112.  If
    "speed" is  out of range  the  speed  will  be set to either maximum or
    minimum.

  Input:
    speed - the speed to be set

  Result:
    None

 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

  Command:
    speed = SpeedDown

  Description:
    Move the CIA speed one tick down.

  Input:
    None

  Result:
    speed - The new speed

 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

  Command:
    speed = SpeedUp

  Description:
    Move the CIA speed one tick up.

  Input:
    None

  Result:
    speed - The new speed