网站建设优化公司,苏州学网站建设,建设论坛网站步骤,网络安装ds 数据段放入数据正确#xff1b; 两次push 操作后#xff0c;ss栈段正确#xff1b; 由于pop 操作顺序#xff0c;ds数据段并没有发生改变#xff1b; Source Code: assume cs:code, ds:data, ss:stackdata segmentdw 0123H,0456H,0789H,0abcH,0defH,0fedH,0cbaH,0987H
… ds 数据段放入数据正确 两次push 操作后ss栈段正确 由于pop 操作顺序ds数据段并没有发生改变 Source Code: assume cs:code, ds:data, ss:stackdata segmentdw 0123H,0456H,0789H,0abcH,0defH,0fedH,0cbaH,0987H
data endsstack segmentdw 0,0,0,0,0,0,0,0
stack endscode segment
start:mov ax,stackmov ss,axmov sp,16mov ax,datamov ds,axpush ds:[0]push ds:[2]pop ds:[2]pop ds:[0]mov ax,4c00Hint 21Hcode ends
end start View Code (2)程序加载后数据段和栈段加载后实际占据的空间是以16个字节为单位。程序中只给出了前两个字其他空间都是补充0 Source Code: assume cs:code , ds:data , ss:stackdata segmentdw 0123H,0456H
data endsstack segmentdw 0,0
stack endscode segmentstart:mov ax,stackmov ss,axmov sp,16mov ax,datamov ds,axpush ds:[0]push ds:[2]pop ds:[2]pop ds:[0]mov ax,4c00Hint 21H
code ends
end start View Code 3 Source Code: assume cs:code ,ds:data, ss:stackcode segment
start:mov ax,stackmov ss,axmov sp,16mov ax,datamov ds,axpush ds:[0]push ds:[2]pop ds:[2]pop ds:[0]mov ax,4c00Hint 21H
code endsdata segmentdw 0123H,0456H
data endsstack segmentdw 0,0
stack endsend start View Code 相比之前三个段的顺序发生改变数据没有改变但是三个段的入口地址肯定变了 具体差别 代码段标号减小 (5) a 段 b 段 的和放到 c 段 栈段也可以用 段地址偏移地址访问 Source Code: assume cs:codea segmentdb 1,2,3,4,5,6,7,8a endsb segmentdb 1,2,3,4,5,6,7,8b endsc segmentdb 0,0,0,0,0,0,0,0c endscode segmentstart:mov ax,amov ds,axmov ax,bmov ss,ax ;栈段mov ax,cmov es,axmov bx,0mov cx,8s:mov al,ds:[bx]add al,ss:[bx] ;栈段也段地址偏移地址访问mov es:[bx],alinc bxloop smov ax,4c00Hint 21H
code ends
end start View Code 6将a段的前8个字逆序放到 b 段中 入栈的方式即为逆序 Source Code: assume cs:codea segmentdw 1,2,3,4,5,6,7,8,9,0aH,0bH,0cH,0dH,0eH,0fH,0ffH
a endsb segmentdw 0,0,0,0,0,0,0,0
b endscode segment
start:mov ax,amov ds,axmov ax,bmov ss,axmov sp,10Hmov bx,0mov cx,8s:push ds:[bx]add bx,2loop smov ax,4c00Hint 21Hcode ends
end start View Code 转载于:https://www.cnblogs.com/TreeDream/p/6920881.html
