A.TEST AL,02H B.OR AL,AL C.CMP AL,BL D.AND AL,BL
A.MOV CS,AX B.MOV DS,AX C.MOV SS,AX D.MOV ES,AX
A.DH=10H,CF=1 B.DH=0F0H,CF=0 C.DH=10H,CF=0 D.DH=0F0H,CF=1