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64525: LINE routine
LINE_ROUTINE 64525 LD A,(IX+0) A=graphics command
64528 AND 24 Check inverse and over bits
64530 CP 24 Are they both set?
64532 JR NZ,DRAW_LINE If not, draw a line
64534 CALL CALC_RELATIVE_OFFSETS Calculate offsets
64537 LD (23677),BC Set current co-ordinates
64541 JP SKIP_3_THEN_NEXT Skip three bytes and execute next instruction
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