MOV AL, 12H ADD AL, 0FFH 上述两条指令执行后，CF和OF的值为 ( ) -题库考试答案搜索网

MOV AL, 12H ADD AL, 0FFH 上述两条指令执行后，CF和OF的值为 ( )

单选题

2021-09-01 16:56

A、CF=1 OF=0
B、CF=1 OF=1
C、CF=0 OF=1
D、CF=0 OF=0

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正确答案

B

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标签：青书学堂平顶山学院计算机科学与技术汇编语言程序设计

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MOV CL,4
SHR AL,CL
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OR BH,30H
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AND AL,OFH
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OR BL,30H
INT 3
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MOV AL, BL
MOV CL, 4
SHR BL, CL
OR BL, 30H
MOV BH, BL
AND AL, OFH
OR AL, 30H
MOV BL, AL
INT 3
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