This is a terminal program that you can use for serial communication with you AVR microcontrollers. The program is simple to use. All the files can be downloaded at the bottom of this page. Within the program the Com ports 1 to 8 can be choosen and also the baud rate from 600 to 25600 baud. The screen is divided in 2 areas, one for recieve and one for transmit. If you enter text in the input area and press [ENTER] the input area will automatically be cleared and send to the microcontroller.
You can use the ATTiny2313 project board to communicate with the AT2313 microcontroller, which has a on board RS232 interface.
The program can be downloaded from here.