王爽汇编10.12

;10.12
assume cs:code,ds:data
data segment
        db 'word',0
        db 'unix',0
        db 'wind',0
        db 'good',0
data ends

code segment
start :
        mov ax,data
        mov ds,ax
        mov si,0
        mov di,16
        mov cx,4

s:      
        call cap
        inc si
        loop s
        MOV AX,4C00H
        INT 21H

    cap:
       
        push cx 
    tip:
        mov cl,[si]
        mov ch,0
        jcxz ok
        and byte ptr [si],11011111B
        inc si
        jmp short tip
    ok:
        pop cx
        
        ret


CODE ENDS
END start 

书上有的代码，稍微把几句废话去掉了