A.MOV SS:[BX+DI],1000H B.MOV DX,1000H C.MOV WORD PTR[BX],1000H D.MOV DS,2000H
A.REP LODSB B.REP SCASB C.REP CMPSB D.REP MOVSB
A.OF=1,CF=0 B.OF=1,CF=1 C.OF=0,CF=0 D.OF=0,CF=1