Enter the isolated USB null-modem. The device consists of two USB Communication Device Class, or CDC chips, creating a USB serial port for each attached computer. The TX and RX lines are cross ...

May refer to any serial communications port or specifically to the serial ports on a PC. See COM1. THIS DEFINITION IS FOR PERSONAL USE ONLY. All other reproduction requires permission.

The code is very simple, and even if you never find yourself needing to fire up an impromptu terminal, it offers an interesting example of how straightforward serial communications really are.