If there are a lot of datas:
mov count,#number_ofdata
mov R0,#Internal_table
mov dptr,#X_table
loop:
mov a,#0
movc a,@a+dptr
mov @R0,a
inc dptr
inc R0
djnz count,loop
....


Xtable:
db ....
db .....

Why not use the table direcly in rom?