Romstar HAL21

sw 1
                  8  7   6   5   4   3   2  1
# air plane 3                        off
            5                        on
coin/play   1/1          off off off
            1/2          off off on
            1/3          off on  off
            2/1          on  off off
            3/1          off on  on
free play                on  on  on
bonus 1st/2nd
 20000/60000     off off
 40000/90000     off on
 50000/120000    on  off
 no bonus        on  on 

sw 2
                 8   7   6   5   4   3   2   1
every bonus set                              off
2nd bonus set                                on

difficulty
easy                                 off off
2                                    off on
3                                    on  off
4                                    on  on 

normal mode                  off off
sound w demo                 off on
never finish                 on  off
screen stop                  on  on

screen right dir         off