I can't tell for the reasons below

;what does dptr point to here ???????
WRITE_LINE: 
MOV R0,#00H 
LineLoop: 
mov A,R0
INC r0 
MOVC A,@A+DPTR 

LCALL WRITE_TEXT ;what does that subr do ???????????? 
CJNE A,'$',LineLoop ;does WRITE_TEXT save acc???????
RET