ws7_5.asm

汇编语言-王爽 源代码 加 卜艳萍版源代码

assume cs:code,ds:data,ss:stack
data segment
db 'ibm             '
db 'dec             '
db 'doc             '
db 'vax             '
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
mov bx,0
mov cx,4
s1:push cx
mov si,0
mov cx,3
 s:mov al,[bx+si]
 and al,11011111b
 mov [bx+si],al
 loop s
add bx,16
pop cx
loop s1
mov ah,4ch
int 21h
code ends
end start