阅读下列程序,指出运行结果 MOV SI,2500H MOV AX,1000H MOV DS,AX MOV CL,05H NEXT:MOV[ SI] ,AL INC AL INC SI DEC CL JNZ NEX TINT 3 程序运行后结果为:DS=()H SI=()HAX=()H CL=()H

阅读下列程序,指出运行结果 MOV SI,2500H MOV AX,1000H MOV DS,AX MOV CL,05H NEXT:MOV[ SI] ,AL INC AL INC SI DEC CL JNZ NEX TINT 3 程序运行后结果为:DS=()H SI=()HAX=()H CL=()H


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根据下面的汇编语言源程序,其运行结果是在屏幕上显示 。 DSEG SEGMENT DAT DB 0FFH N EQU 3 BUF DB 3 DUP(‘?’) DB ‘$’ DSEG ENDS SSEG SEGMENT STACK DB 256 DUP(0) SSEG ENDS CSEG SEGMENT ASSUME DS:DSEG,SS:SSEG,CS:CSEG START: MOV AX,DSEG MOV DS,AX MOV BX,OFFSET BUF MOV SI,N MOV AL,DAT MOV AH,0 MOV CX,10 NEXT: XOR DX,DX DIV CX ADD DL,30H ;形成ASCII码 DEC SI MOV [BX+SI],DL OR SI,SI JNE NEXT LEA DX,BUF MOV AH,9 INT 21H MOV AH,4CH INT 21H CSEG ENDS END START

下面的程序用来从键盘重复接收一字符送BUFF开始的单元,直到接收到行结束标志ODH。在程序中填空,保证其正确运行。1 DATA SEGMENT2 BUFF DW 128 DUP(0)3 DATA ENDS4 CODE SGEMENT5 ASSUME CS:CODE,DS:DATA6 BEGIN: MOV AX, DATA7 MOV DS, AX8 LEA SI, BUFF9 GCH: MOV AH, 01H10 INT 21H11 MOV [SI], AL12 INC SI13 __________14 JNE GCH15 MOV AH, 4CH16 INT 21H17 CODE ENDS18 END BEGIN

完成41H送[2100H]、42H送[2101H]的正确程序是( )。A.MOV AL,41H MOV [2100H], AL INC AL MOV [2100H],ALB.MOV SI, 2100H MOV [SI], ‘A’ INC SI MOV [SI], ‘B’C.MOV AX,4241H MOV AX,AXD.MOV AX, ‘AB’ MOV [2100H],AX

下列程序执行后,SI寄存器中的内容为( )。 MOV SI, -1 MOV CL, 4 SAL SI, CL AND SI, 7FFFH OR SI, 7800H NOT SIA.0FHB.FOHC.FFHD.00H

下列程序执行后,SI寄存器中的内容是______。1 MOV SI, -12 MOV CL, 43 SAL SI, CL4 AND SI, 7FFFH5 OR SI, 8000H6 NOT SI

下列程序执行后,(SI)为( ) MOV CX,5 MOV SI,4 Al:INC SI INC SI LOOP AIA.4B.5C.14D.15

设内存22000H和22001H单元分别存放的数据为04H和06H,写出如下程序的运行结果,并指出该程序段的功能。 MOV AX,2000H MOW DS,AX MOC CL,4 MOV SI,2000H MOV AL,[SI+1] SHL AL, CL ADD AL,[ SI] MOV[ SI+2], AL INT 3 请问:SI=();AL();(22002H)=();程序功能是:()

已知DS= ES =1000H执行下列程序: MOV SI,101H MOV DI,100H MOV CX,4 LP1:MOV AL,[ SI] MOV[ DI] ,AL INC SI INC DI LOOP LP1 INT 3 DS:101H DB 69H,23H,56H,3AH 程序运行后结果为:(10100H)= ()H(10101H)= ()H(10102H)= ()H(10103H)= ()H

判断下列指令是否正确。若不正确,指出错误原因。 (1)MOV SI, DL (2)MOV ES, 1000H (3)LEA AX, 3006H (4)MOV [BP][DI], 0 (5)MOV [SI], [DI] (6)MOV [DI],[BX] (7)MOV [DX+SI],AL (8)MUL AL , 58H (9)MOV DS,SEG DAT (10)MOV WORD PTR [BX],-1

指出下列指令中哪些是错误的,错在什么地方。  (1)MOV DL,AX  (2)MOV 8650H,AX  (3)MOV DS,0200H  (4)MOV [BX],[1200H]  (5)MOV IP,0FFH  (6)MOV [BX+SI+3],IP  (7)MOV AX,[BX][BP]  (8)MOV AL,ES:[BP]  (9)MOV DL,[SI][DI]  (10)MOV AX,OFFSET 0A20H  (11)MOV AL,OFFSET TABLE  (12)XCHG AL,50H  (13)IN BL,05H  (14)OUT AL,0FFEH

设(DS)=1234H,(SI)=124,(12464H)=30ABH,(12484H)=464H。试写出下列程序段执行后有关寄存器的结果。LEA.SI,[SI]MOV.AX,[SI]MOV.[SI+22H],1200HLDS.SI,[SI+20H]ADD.AX,[SI](DS)=();(SI)=();(AX)=()。

下列指令中错误指令是()A、MOV AX,DSB、MOV CS,1500HC、MOV SI,BXD、MOV [3000H],ALE、MOV [DI+32H],[1845H]F、MOV AL,1000H

指出以下指令中,哪些指令是非法的,并说明为什么(8086系统)。 (1) PUSH 1234H (2) MOV CS,AX (3) IN AX, 300 (4) MOV AX,[DX+12] (5) MOV BX,[BX] (6) MOV DS,1000H (7) XCHG AL,AL (8) MOV AL,100H (9) MOV DX,AL (10)LEA BL,[BX+5] (11)LEA DX,BX (12)MOV [1000H],12H (13)ADD AX,DS (14)SUB [0100H],BYTE PTR [0001] (15)SHL BL,2 (16)SHR CL,CL (17)MUL AL,BL (18)INT 400

分别说明下列指令的源操作数和目的操作数各采用什么寻址方式。  (1)MOV AX,2408H  (2)MOV CL,0FFH  (3)MOV BX,[SI]  (4)MOV 5[BX],BL  (5)MOV [BP+100H],AX  (6)MOV [BX+DI],’$’  (7)MOV DX,ES:[BX+SI]  (8)MOV VAL[BP+DI],DX  (9)IN AL,05H  (10)MOV DS,AX

已知:DS=1000H,BX=0200H,SI=02H,内存10200H~10205H 单元的内容分别为10H, 2AH,3CH,46H,59H,6BH。下列每条指令执行完后AX 寄存器的内容各是什么?  (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]

设(DS)=2000H,(ES)=2100H,(SS)=1500H,(SI)=00A0H,(BX)=0100H,(BP)=0010H,数据变量VAL的偏移地址为0050H,请指出下列指令的源操作数字段是什么寻址方式?它的物理地址是多少? (1) MOV AX,21H (2) MOV AX,BX (3) MOV AX,[1000H] (4) MOV AX,VAL (5) MOV AX,[BX] (6) MOV AX,ES:[BX] (7) MOV AX,[BP] (8) MOV AX,[SI] (9) MOV AX,[BX+10] (10) MOV AX,VAL[BX] (11) MOV AX,[BX][SI] (12) MOV AX,VAL[BX][SI]

判断下列指令是否正确。若不正确,指出错误原因。  (1)MOV AX, [EBX]  (2)MOV SI, DL  (3)MOV EBP, [ESP][EAX*3] (4)LEA AX, 3006H   (5)MOV [BP][DI], 0    (6)MOV [SI], [DI]   (7)MOV ES, 1000H   (8)MOV AX, X+2  (9)MOV AX, CX+2    (10)MOV [EAX][EAX*2], AL

说明下列指令中不合法的原因。 (1)MOV 64H, CL  (2)MOV CL, 100H  (3)MOV CL, 256  (4)MOV SS, 6180H  (5)MOV CS, WORD PTR[BX] (6)MOV DS, SS  (7)XCHG AL, 40H (8)XCHG ES, AX  (9)IN 160H, AL  (10)CMP [SI], [BX] (11)MOV DS, 1000H  (12)POP CS

设DS=1000H,ES=2000H,SS=3500H,SI=00A0H,DI=0024H,BX=0100H,BP=0200H, 数据段中变量名为VAL 的偏移地址值为0030H,试说明下列源操作数字段的寻址方式是什 么?物理地址值是多少?  (1)MOV AX,[100H]  (2)MOV AX,VAL  (3)MOV AX,[BX]  (4)MOV AX,ES:[BX]  (5)MOV AX,[SI]  (6)MOV AX,[BX+10H] (7)MOV AX,[BP]  (8)MOV AX,VAL[BP][SI]  (9)MOV AX,VAL[BX][DI]  (10)MOV AX,[BP][DI]

问答题判断下列指令是否正确。若不正确,指出错误原因。  (1)MOV AX, [EBX]  (2)MOV SI, DL  (3)MOV EBP, [ESP][EAX*3] (4)LEA AX, 3006H   (5)MOV [BP][DI], 0    (6)MOV [SI], [DI]   (7)MOV ES, 1000H   (8)MOV AX, X+2  (9)MOV AX, CX+2    (10)MOV [EAX][EAX*2], AL

填空题阅读下列程序,指出运行结果 MOV SI,2500H MOV AX,1000H MOV DS,AX MOV CL,05H NEXT:MOV[ SI] ,AL INC AL INC SI DEC CL JNZ NEX TINT 3 程序运行后结果为:DS=()H SI=()HAX=()H CL=()H

填空题设内存22000H和22001H单元分别存放的数据为04H和06H,写出如下程序的运行结果,并指出该程序段的功能。 MOV AX,2000H MOW DS,AX MOC CL,4 MOV SI,2000H MOV AL,[SI+1] SHL AL, CL ADD AL,[ SI] MOV[ SI+2], AL INT 3 请问:SI=();AL();(22002H)=();程序功能是:()

填空题已知DS= ES =1000H执行下列程序: MOV SI,101H MOV DI,100H MOV CX,4 LP1:MOV AL,[ SI] MOV[ DI] ,AL INC SI INC DI LOOP LP1 INT 3 DS:101H DB 69H,23H,56H,3AH 程序运行后结果为:(10100H)= ()H(10101H)= ()H(10102H)= ()H(10103H)= ()H

问答题说明下列指令中不合法的原因。 (1)MOV 64H, CL  (2)MOV CL, 100H  (3)MOV CL, 256  (4)MOV SS, 6180H  (5)MOV CS, WORD PTR[BX] (6)MOV DS, SS  (7)XCHG AL, 40H (8)XCHG ES, AX  (9)IN 160H, AL  (10)CMP [SI], [BX] (11)MOV DS, 1000H  (12)POP CS

问答题设(DS)=1234H,(SI)=124,(12464H)=30ABH,(12484H)=464H。试写出下列程序段执行后有关寄存器的结果。LEA.SI,[SI]MOV.AX,[SI]MOV.[SI+22H],1200HLDS.SI,[SI+20H]ADD.AX,[SI](DS)=();(SI)=();(AX)=()。

填空题用DEBUG调试如下程序段: MOV SI,O MOV AL,1000[ SI] LP:INC SI CMP SI,08H JAE A11 CMP.AL,1000[SI] JGE A22 MOV AL,1000[SI] A22:JMP LP A11:INT 3 DS:1000H DB 34H,47H,78H,77H DB 88H,99H,OAAH,OFFH 则程序执行后,AL=()该程序的功能是:()

问答题判断下列指令是否正确。若不正确,指出错误原因。 (1)MOV SI, DL (2)MOV ES, 1000H (3)LEA AX, 3006H (4)MOV [BP][DI], 0 (5)MOV [SI], [DI] (6)MOV [DI],[BX] (7)MOV [DX+SI],AL (8)MUL AL , 58H (9)MOV DS,SEG DAT (10)MOV WORD PTR [BX],-1