So you want to connect to your Didj…

If you attempt a direct connection from your pc’s serial port to the Didj you WILL Damage your Didj and possibly your computer!

A direct serial-line connection won’t work with the Didj because the RS-232 spec uses 12v, while the Didj prefers about 3-5v. So you’ll need an adapter to communicate to the UART on the Didj.
You can use almost any UART adapter with the Didj

The one on the leftt needs the right angle 3 pin header
The one on the right can use ether the 6 pin straight or right angle