How to convert EAX number to string for printing (TASM)

;put numbers in str
putYSq:
	MOV BX,20           ;the number start at string[20]->[19]....
	MOV tempXSq,EDX     ;
	XOR EDX,EDX 
	DIV Ten             ;divided by 10 to get the laft digit
	ADD EDX,'0'         ;convert to ascii
	MOV XYstrSq[BX],EDX ;THIS IS WERE I KEEP GETTING THE ERROR***
	DEC BX              ;next is string[19]->[18]....     
	CMP EAX,0           ;if the number is 0 or less then exit from loop
	JBE nextNum 
	JMP putYSq