汇编语言的输出问题，输出一堆乱码,为什么？

DATA SEGMENT
MATH DB 5 DUP(5),'$'
DATA ENDS

CODE SEGMENT
ASSUME DS:DATA,CS:CODE
START:
MOV AX,CODE
MOV DS,AX

MOV AH,09H
LEA DX,MATH
INT 21H

MOV AH,4CH
INT 21H

CODE ENDS
END START