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[单选题]
设BL=78H,AL=89H,执行指令ADDBL,AL后,BL中的数据是()?
A.78H
B.89H
C.101H
D.01H
查看答案
![](https://static.youtibao.com/asksite/comm/h5/images/solist_ts.png)
A.78H
B.89H
C.101H
D.01H
A.3412H;7856H
B.1234H;7856H
C.7856H;3412H
D.7856H;1234H
A.它们都是按位操作的
B.指令XOR AX,AX执行后,结果不变,但是影响标志位
C.指令AND AL,0FH执行后,使AL的高4位清零,低4位不变
D.若DL=09H,CH=30H,执行OR,DL,CL后,结果为DL=39H