The same link is also available for the user to transfer data from the host to the DSK-board and vice versa. TI implemented for this purpose a communication channel architecture called RTDX. The basic functionality is similar to I/O-channels found in major operating systems. In order to function it needs a running "CodeComposer Studio" program on a PC, which has to be connected by hardware and software to the DSK-board: the RTDX-link is for development purposes only and has to be replaced by other link-implementations, such as a standard serial or USB link, in final applications.
For details of the DSK6416-board see the user manual. In short: it implements the 32-bit fixed-point DSP 6416 of TI. It has 1MB memory on-chip, 16MB of external RAM and 512KB of flash memory.