题目内容
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[主观题]
(SP)=40H,(39H)=30H,(40H)=60H。执行下列指令:POP DPHPOP DPL执行后,DPTR的内容为(),SP的内容为()。
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A.00H
B.40H
C.30H
D.10H
30H, 32H COUNT EQU ($-ASCBUF)/2 ;$为当前地址指针 BCDBUF DB COUNT DUP() DATA ENDS CODE SEGMENT ASSUME CS: CODE, DS:DATA, ES:DATA START: MOV AX, DATA MOV DS, AX MOV ES, AX ;设置附加段与数据段完全重叠 CLD MOV SI, OFFSET ASCBUF MOV DI, OFFSET BCDBUF MOV CX, COUNT AA: LODSB AND AL, 0FH MOV BL, AL LODSB PUSH CX MOV CL, 4 SHL AL, CL POP CX OR AL, BL STOSB LOOP AA MOV AH, 4CH INT 21H CODE ENDS END START
A.20H,30H
B.30H,20H
C.3AH,30H
D.3AH,3AH