Serial Port and dj3

[nomemory99]

What is the intended use of the serial port on the back of the dc? What purpose does it serve besides creating backups?

And DJ3 is giving me a TOC error on almost every *.cdi I have burned. What are the recommended settings?

Thanks

[emulsoin]

It was originally built for liinking to the neogeo pocket... sega messed up in to many ways on that one...