assume cs:code,ds:data,ss:stack
data segment
dw 0123h,0456h,0789h,0abch,0defh,0fedh,0cbah,0987h
data ends
stack segment
dw 0,0,0,0,0,0,0,0
stack ends
code segment
start:mov ax,stack
mov ss,ax
mov sp,16
mov ax,data
mov ds,ax
push ds:[0]
push ds:[2]
pop ds:[2]
pop ds:[0]
mov ax,4c00h
int 21h
code ends
end start
将实验5第一小题编译后用debug加载发现
AX=1401 BX=0000 CX=0042 DX=0000 SP=0010 BP=0000 SI=0000 DI=0000
DS=1401 ES=13F1 SS=1402 CS=1403 IP=000D NV UP EI PL NZ NA PO NC
1403:000D FF360000 PUSH [0000] DS:0000=0123
-d 1402:0
1402:0000 00 00 00 00 00 00 01 14-00 00 0D 00 03 14 0A 0E ................
ss指向的堆栈段中的16个字节没有都被初始化为0,是什么原因? |
