;initillise pointer
mov dptr,#code_table
mov r6,dph
mov r7,dpl
ret

;increment pointer
mov dph,r6
mov dpl,r7
inc dptr
mov r6,dph
mov r7,dpl
ret

;decrement pointer

dec r7
mov a,r7
jnz next
dec r6
next:
ret

;read using pointer
mov dph,r6
mov dpl,r7
clr a
movc a,@a+dptr
;lcall incr_pointer/decr_pointer


regards
pranav