text: Some poorly implemented game ports ( usually built-in on old motherboards and I\/O cards ) did n't fully support either 4 axes or 4 buttons , making only the use of a single 2-axis and 2-button joystick possible .
simplified: Some poorly implemented game ports ( usually built-in on old motherboards and I\/O cards ) did not fully support either 4 axes or 4 buttons , making only the use of a single 2-axis and 2-button joystick possible .