计算得到的物理地址是20000H+0100H+0002H=20102H,所以应该将20102H)存储的数值56H赋给AL,将(20103H)存储的数值78H赋给AH,所以执行这条指令后,AX的值是7856H⑦MOV AX,1100H[BX][SI]这条指令使用了相对基址变址寻址,计算方法:“DS段地址左移4个二进制位+BX中存储的数值+SI中存储的数值+1100H=物理地址...
答: (1) AX=1200H ,立即数寻址; (2) AX=0100H ,寄存器寻址; (3) AX=4C2AH ,直接寻址; (4) AX=3412H ,寄存器间接寻址; (5) AX=4C2AH ,寄存器相对寻址; (6) AX=7865H ,基址变址寻址; (7) AX=65B7H ,基址变址相对寻址。 根据入口参数L=0、1、2,依次实现对大些字母转换成小写、小写转换...
现有(DS)=2000H,(BX)=0100H,(SI)=0002H,(20220H)=12H,(20221H)=34H,(20222H)=56H,(20223H)=78H,(21200H)=2AH,(21201H)=4CH,(21202H)=B7H,(21203H)=65H,试说明以下各条指令执行完后AX存放器的内容。 〔1〕MOV AX,1200H 〔2〕MOV AX,BX 〔3〕MOV AX,[1200H] 〔4〕MOV AX...
(2) MOV AX,BX ;寄存器寻址。指令执行后,(AX)=(BX)= 0100H (3) MOV AX,[1200H] ;存储器直接寻址。 EA = 1200H,PA =(DS)×10H+EA = 2000H×10H+1200H = 21200H, 执行后,(AX)= 2A90H (4) MOV AX,[BX] ;寄存器间接寻址。 EA =(BX)= 0100H, PA =(DS)×10H+EA = 2000H×10H+0...
设有关寄存器及存储单元的内容如下:(DS)=2000H, (BX)=0100H, (AX)=1200H, (SI)=0002H, (20100H)=12H, (20101H)=34H, (20102H)=56H, (20103H)=78H, (21200H)=2AH, (21201H)=4CH, (21202H)=0B7H, (21203H)=65H.;IR0~IR7的中断类型码为70H~77HINCDX;取从片8259A的奇地址端口OUTD...
(2) MOV AX,BX 解:(AX)= 0100H (3) MOV AX,[1200H] 解:物理地址=(DS)×10H+1200H (AX) = 4C2AH (4) MOV AX,[BX] 解:物理地址=(DS)×10H+0100H=20100H (AX)=3412H (5) MOV AX,1100[BX] 解:物理地址=(DS)×10H+0100H+1100H=21200H (AX)=4C2AH 反馈 收藏 ...
设〔DS〕=2000H,〔BX〕=0100H,〔SI〕=0002H,〔20100〕=3412H,〔20102〕=7856H,〔21200〕=4C2AH,〔21202〕=65B7H,求以下指令执行后AX存放器的容: 〔1〕MOV AX,1200H; 〔2〕MOV AX,BX; 〔3〕MOV AX, [1200H]; 〔4〕MOV AX, [BX]; 〔5〕MOV AX,1100[BX];〔6〕MOV AX, [BX][SI]; ...
现有(DS)=2000H,(BX)=0100H,(SI)=0002H,(20100H)=12H,(20101H)=34H,(20102H)=56H,(20103H)=78H,(21200H)=2AH,(21201H)=4CH,(21202H)=0B7H,(21023H)=65H,下列指令执行后填入AX寄存器的内容: (1)MOV AX,1200H;(AX)=___ (2)MOV AX,BX;(AX)=___ (3)MOV AX,[1200H];(AX...
答(1)MOV AX,1200H ;(AX)=1200H (2)MOV AX,BX ;(AX)=0100H (3)MOV AX,[1200H] ;(AX)=4C2AH (4)MOV AX,[BX] ;(AX)=3412H (5)MOV AX,1100H[BX] ;(AX)=4C2AH (6)MOV AX,[BX+SI] ;(AX)=7856H (7)MOV AX,[1100H+BX+SI] ;(AX)=65B7H结果...
设有关寄存器及存储单元的内容如下:DS=2000H, BX=0100H, AX=1200H, SI=0002H, [20100H]=12H, [20101H]=34H,