Hex_table:
db '0','1','2','3'
db '4','5','6','7'
db '8','9','A','B'
db 'C','D','E','F'

mov dptr,#hex_table ;Point to table base
movc a,@a+dptr ;Acc nibble = Table index

everything is clear.
(were questions, but disappeared after viewing the listing file)

And now when using ext.memory for program and using look-ups. Oh my...
Whats different now?
(Should i use MOVX to 'save' all the table values? Or are they somehow magicly stored in ex.RAM? Should i switch segments?)

To Michael:
you are very kind. but i dont understand what the table index should i set. Maybe i will understand after answering previous question.

MOV A,#LOW (C2F_Table) ;add word index
ADD A,R7 ;from R6::R7
MOV DPL,A ;to table address
MOV A,#HIGH (C2F_Table)

Thaks again,
Rob