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问答题
已知:DS=2000H,BX=0300H,SI=0002H,(20300H)=12H,(20301)=34H,(20302H)=56H,(20303H)=78H,(21400H)=2AH,(21401H)=4CH,(21402H)=B7H,(21403H)=65H
试说明下列指令执行完后AX寄存器的内容:MOV AX,[1400H]
问答题
已知:DS=2000H,BX=0300H,SI=0002H,(20300H)=12H,(20301)=34H,(20302H)=56H,(20303H)=78H,(21400H)=2AH,(21401H)=4CH,(21402H)=B7H,(21403H)=65H
试说明下列指令执行完后AX寄存器的内容:MOV AX,BX
问答题
已知:DS=2000H,BX=0300H,SI=0002H,(20300H)=12H,(20301)=34H,(20302H)=56H,(20303H)=78H,(21400H)=2AH,(21401H)=4CH,(21402H)=B7H,(21403H)=65H
试说明下列指令执行完后AX寄存器的内容:MOV AX,1400H
问答题
问答题
试编程实现:
(1)AL寄存器的低4位清0
(2)BL寄存器的低4位置1
(3)CL寄存器的低4位取反
(4)测试DL寄存器的最低2位是否同时为0,若是,将0送入BL寄存器;否则将1送入BL寄存器。