Routines
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C54A: Does the antibody at IY touch the thing at IX?
Used by the routine at ANTIBODY_STRIKE.
Input
IX the thing
IY an antibody record
Output
F carry if it does
ANTIBODY_TOUCHING C54A LD A,(IY+$00) not an antibody in flight (graphics 80-95): no
C54D SUB $50
C54F CP $10
C551 RET NC
C552 JR TOUCH_TEST the overlap test
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