分析下列程序后个寄存器及存储单元的内容

显示全部楼层 · 2009-6-26 15:12:16

1.MOV 34H,#10H
MOV R0,#13H
MOV A,34H
ADD A,R0
MOV R1,#34H
ADDA,@R1
(A)=_______
2. MOV A,#30H
MOV B,#0AFH
MOV R0,#31H
MOV 30H,#87H
XCHA,R0
XCHDA,@R0
XCHA,B
SWAP A
(A)_____
写出分析过程谢谢

千问 · 2009-6-26 15:12:16

MOV 34H,#10H;(34H)=10HMOV R0,#13H ;R0 = 13HMOV A,34H
;A=(34H)=10HADD A,R0
;A=A+R0=23HMOV R1,#34H ;R1=34HADD A,@R1
;A=A+(R1)=23H+(34H)=23H+10H=33H;(A)= _33H_____ MOV A,#30H
;A=30H MOV B,#0AFH ;B=0AFH MOV R0,#31H ;R0=31H MOV 30H,#87H;(30H)=87H XCH A,R0...