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6859: Draw trail of photon bolt
Used by the routine at 663D.
6859 LD IX,($5DDA) Get the screen offset for the photon bolt
685D LD L,(IX+$03) Put the attribute address in HL
6860 LD H,(IX+$05)
6863 LD A,($5DD8) Get photon bolt position
6866 ADD A,L
6867 LD L,A Adjust the attribute address relative to this
6868 LD (HL),$23 Set to green PAPER, magenta INK
686A RET
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