54.asm

本书为清华大学第二版汇编语言的课后题详解

;54.asm
 ;即实验讲义第一个题目
datarea segment
  string1   db   'Move the cursor backward.'
  string2   db   'Move the cursor backward.'
;
  mess1     db   'Match.',13,10,'$'
  mess2     db   'No match.',13,10,'$'
datarea ends
prognam segment
main    proc   far
        assume cs:prognam,ds:datarea,es:datarea
start:
        push  ds
        sub   ax,ax
        push  ax
        mov   ax,datarea
        mov   ds,ax
        mov   es,ax
        lea   si,string1
        lea   di,string2
        cld
        mov   cx,25
        repz  cmpsb
        jz    match
        lea   dx,mess2
        jmp   short disp
match:  lea   dx,mess1
disp:   mov   ah,09
        int   21h
        ret
main    endp
prognam ends
        end   start