设有 DS=2000H,BX=0100H,SI=0002H,(20100H)=12H,(20101H)=34H,(20102H)=56H,(20103H)=78H,(21200H)=2AH,(21201H)=4CH,(21202H)=B7H,(21203H)=65H,试说明下列各条指令执行完后 AX寄存器的内容。(1) MOV AX,[1200H]AX=______(2) MOV AX,[BX]AX=______(3) MOV AX,1100[BX]AX=______(4) MOV AX,[BX][SI]AX=______(5) MOV AX,1100[BX][SI]AX=______
举一反三
- 现有(DS)=2000H,(BX)=0100H,(SI)=0002H,(20100H)=12H,(20101H)=34H,(20102H)=56H,(20103H)=78H,(21200H)=2AH,(21201H)=4CH,(21202H)=B7H,(21203H)=65H,试说明下列各条指令执行完后AX寄存器的内容。(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]______ (7) MOV AX, 1100[BX][SI]______
- BAS DB 11,22,33,44,55 NUM DB 10,20,30,40,50 IN DB 1,2,3 代码段定义如下: MOV BX,OFFSET BAS LEA SI,IN MOV DI,4 MOV AX,[SI+2] ;(AX)=【1】H XCHG AX,[SI] ;(AX)=【2】H MOV AX,4[BX] ;(AX)=【3】H MOV AX,[BX][DI] ;(AX)=【4】H
- 1.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.试说明下列各条指令单独执行后相关寄存器或存储单元的内容。(1)MOV AX, 1800H (2) MOV AX, BX(3) MOV BX, [1200H] (4) MOV DX, 1100[BX](5) MOV [BX][SI], AL (6) MOV AX, 1100[BX][SI]
- 设有关寄存器及存储单元的内容如下:(DS)=2000H,(BX)=0100H,(SI)=0002H,(20100)=12H,(20101)=34H,(20102)=56H,(20103)=78H,(21200)=2AH,(21201)=4CH,(21202)=0B7H,(21203)=65H,试说明下列各条指令执行完后AX寄存器的内容。 (1)MOV AX,1100[BX]答:AX= ______ (2)MOV AX,1100[BX][SI]答:AX= ______
- 现有(DS)=2000H,(BX)=0100H,(SI)=0002H,(20100H)=12H,(20101)=34H,(20102H)=56H,(20103H)=78H,(21200H)=2AH,(21201H)=4CH,(21202H)=0B7H,(21203H)=65H,下列指令源操作数寻址方式,执行后AX寄存器的内容:MOVAX,1200H;(AX)=MOVAX,BX;(AX)=MOVAX,[1200H];(AX)=MOVAX,[BX] ;(AX)=MOVAX,1100H[BX] ;(AX)=MOVAX,[BX][SI];(AX)=MOVAX,1100H[BX+SI];(AX)=