In general you do not use the DPTR instructions directly in C. Instead you simply declare variables to be in the CODE or the XDATA spaces and then by writing code that accesses these variables the compiler will generate the appropriate MOVC or MOVX opcodes to read or write the memory locations as appropriate.

By the way,....it is kind of a policy on this forum to post with our real names. So please dispatch this Keil Young stuff to the other side of the moon. I asked you about this some time back but now I see you sign as Ruben.

Michael Karas