> can someone please explain this
> line of code?
>
> *MOVT A,@DPTR

This is not a valid 8052 instruction. At least not on a standard 8052. Perhaps it is a 16-bit extension of an 8052? Do you know what microcontroller it is supposed to run on?

The 8052 has two instructions that look similar. They are:

MOVC A,@A+DPTR
MOVX A,@DPTR

But MOVT, nope.

Take care,
Craig Steiner