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- ;----前三个字母转换为大写----
- assume cs:code,ds:data,ss:stack
- stack segment
- db 10h dup(?)
- stack ends
- data segment
- db '1.file '
- db '2.edit '
- db '3.search '
- db '4.view '
- db '5.options '
- db '6.help '
- data ends
- code segment
- start:
- mov ax,data
- mov ds,ax
-
- mov ax,stack
- mov ss,ax
- mov sp,10h
-
- mov si,0h
- mov cx,6h
- cap:
- push cx
- mov cx,03h
- mov bx,2h
- s:
- mov al,[bx+si]
- and al,0dfh
- mov [bx+si],al
- inc bx
- loop s
- pop cx
-
- add si,10h
- loop cap
-
- mov ax,4c00h
- int 21h
- code ends
- end start
复制代码
用到了栈保存cx |
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