Below are the specific dip-switch settings users have contributed for HAL 21:
HAL 21, Romstar --------------- 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
NOTE: Dip switch setting information is contributed by the community and although is believed to be correct (most of the time), has not been tested or verified.
Use this information at your own risk.
Official dip switch information may be available in the manual: