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B68F: Routine at B68F
B68F POP HL
B690 LD E,(HL)
B691 INC HL
B692 LD D,(HL)
B693 INC HL
B694 LD B,(HL)
B695 INC HL
B696 PUSH HL
B697 EX DE,HL
B698 XOR A
B699 CP (HL)
B69A RET NZ
B69B INC HL
B69C DJNZ $B699
B69E RET
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