题目内容
(请给出正确答案)
[单选题]
设内存单元(10FFOH)=10H,(10FF1H)=20H,(10FF2H)=30H,如从地址10FF1H中取出一个字的内容是__。
A.1020H
B.3020H
C.2030H
D.2010H
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A.1020H
B.3020H
C.2030H
D.2010H
已知单元(10H)中存放着一个有符号数x(补码),试编写一个程序段,确定以下函数值:
并将函数值y存放到单元(11H)中。
MOV R7,#10H
MOV R1,#30H
L00P:CJNE @R1,#00H,NEXT
MOV @R1,#00H
SJMP NEXT1
NEXT:DEC @R1
NEXT1:INC R1
DJNZ R7,LOOP
SJMP $
END
语句Y DW 10DUP(10H,20H)所定义的变量Y在内存中占用的字节数是 ()
A.10
B.20
C.40
D.80
A.00H
B.40H
C.30H
D.10H
A.08H
B.09H
C.10H
D.11H
A.SP=2502H,BX=1020H
B.SP=2504H、BX=4030H
C.SP=2504H,BX=3040H
D.SP=2500H,BX=2010H
A.(Msp)—>Ri,(SP)+1—>SP
B.(SP)+1—>SP,(Msp)—>A:
C.(SP)-1—>SP,(Msp)—>A:
D.(Msp)—Ri,(SP)-1—SP