Assembly Level Programming to read a string and display it in lowercase (8086 MP)

Assembly Level Programming to read a string and display it in lowercase

.model small

.data

 str db 100 dup (?)

.code

 main proc

  mov ax,@data

  mov ds,ax

  mov si,offset str

 

  INPUT:mov ah,1

        int 21h

        cmp al,13

        je LAST

        cmp al,60h

        jc SMALLCASE

        mov [si],al

        inc si

        jmp INPUT

  SMALLCASE:mov [si],al

            XOR [si],32

            inc si

            jmp INPUT

  LAST: mov [si],'$'

  mov dx,offset str

        mov ah,09

        int 21h

        mov ah,4ch

        int 21h

 main endp

end