8051 ASM - copy from xmemory to xmemory

Hi all,

I am trying to copy a block of fata from one of my external memory to another.

The problem is, that there is only one dptr => i can't use a loop.
The dst exmemory address is fixed and doesn't change.

is there anyway to overcome this problem?

You can use 8-bit Data pointers if your size of block is less than 256 bytes. use instruction:
MOVX A, @Ri
where Ri can be R0 or R1
so you can access address range from XX00 to XXFFH, XX is MSB which can be configured prior to reading/writing on Port 2.

else you need to maintain memory addresses somewhere in RAM if using one DPTR.