• 2021-04-14
    DS=1000H,BX=0200H,SI=2,内存10200H-10205H 单元的内容分别是10H, 2AH, 3CH, 46H, 59H, 6BH 下列指令执行后,AX=? (1)MOV AX,0200H (2) MOV AX,[200H] (3)MOV AX,BX (4) MOV AX,3[BX] (5)MOV AX,[BX+SI] (6) MOV AX,2[BX+SI]
  • (1)0200H, (2)2A10H (3)0200H (4)5946H (5)463CH (6)6B59H

    内容

    • 0

      下列使用正确的指令是( )。 A: MOV AH, BX B: MOV BX, OFFSET MYDAT [SI] C: MOV AX, [BX+SI] D: MOV CS, AX

    • 1

      阅读下面程序段: MOV AX,1234H MOV CL,4 ROR AX,CL INC AX MOV BX,0 ADD BX,AX 该程序段执行后,AX=______H,BX=_______ H。(注:(1)字符全部大写,并且为半角字符)

    • 2

      指出下列传送类指令中非法的指令(针对8086/8088 CPU)。 (1)MOV BX,AL (2)MOV BH,AL (3)MOV 100,CL (4)MOV SS,2400H (5)MOV [SI],[BX] (6)MOV [SI+4*3],BX (7)MOV AX,[BX][BP] (8)MOV AX,[SI][BP] (9)MOV AX,BX+DI (10)MOV AX,[BX+DI] (11)MOV SP,AX (12)MOV SP,[AX] (13)XCHG AH,AL (14)XCHG 200,AL (15)OUT 21H,AL (16)OUT 260H,AL

    • 3

      已知DS=091DH,SS=1E4AH,AX=1234H,BX=0024H,CX=5678H,BP=0024H,SI=0012H,DI=0032H,[09226H]=00F6H,[09228H]=1E40H,[1E4F6H]=091DH,试求单独执行下列指令后的结果。 (1)MOV CL,20H[BX][SI]; CL=? (2)MOV [BP][DI],CX; [1E4F6H]=? (3)LEA BX,20H[BX][SI]; BX=? MOV AX,2[BX]; AX=? (4)LDS SI,[BX][DI] MOV [SI],BX; SI=? [SI]=? (5)XCHG CX,32H[BX]; XCHG 20H[BX][SI],AX; AX=? [09226H]=?

    • 4

      写出每条汇编指令执行后相关寄存器的值 mov ax,62627 AX=________________ mov ah,31H AX=________________ mov al,23H AX=________________ add ax,ax AX=________________ mov bx,826CH BX=________________ mov cx,ax CX=________________ mov ax,bx AX=________________ add ax,bx AX=________________ mov al,bh AX=________________ mov ah,bl AX=________________ add ah,ah AX=________________ add al,6 AX=________________ add al,al AX=________________ mov ax,cx AX=________________