TITLE Print String Backwards Program
INCLUDE Irvine16.inc
.data
myString BYTE "Hello, World!"
stringBkwd BYTE 0ah,0ah,0dh,"Here is the same string backwards: ",0ah,0ah,0dh
dblSpc BYTE 0ah,0ah,0dh
.code
main PROC
mov ax,@data ;
mov ds,ax ;
mov si,OFFSET myString ;mov offset of myString to si
mov cx,LENGTHOF myString;set loop counter
stringFwd: ;print string forwards
mov ah,2 ;
mov dl,[si] ;
int 21h ;
add si,1h ;
loop stringFwd ;
mov ah,40h ;
mov bx,1 ;
mov cx,SIZEOF stringBkwd;
mov dx,OFFSET stringBkwd;
int 21h ;
mov cx,LENGTHOF myString;set loop counter
sub si,1h ;position si at end of string
stringBwd: ;print string backwards
mov ah,2 ;
mov dl,[si] ;
int 21h ;
sub si,1h ;
loop stringBwd ;
mov ah,40h ;print double space
mov bx,1 ;
mov cx,SIZEOF dblSpc ;
mov dx,OFFSET dblSpc ;
int 21h ;
exit
main ENDP
END main
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