Routines
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F641: Routine at F641
Used by the routine at F612.
F641 LD A,($5EA0)
F644 CP $FF
F646 JR NZ,$F649
F648 XOR A
F649 CALL $B699
F64C LD B,A
F64D AND $0F
F64F LD C,A
F650 LD A,B
F651 RRA
F652 RRA
F653 RRA
F654 RRA
F655 AND $0F
F657 RET
This entry point is used by the routine at F628.
F658 LD A,($5EA4)
F65B CP $FF
F65D JR NZ,$F649
F65F XOR A
F660 JR $F649
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