Virtual Serial Ports Driver XP - VSPD XP 4.0 - Linked serial ports emulator
Using Virtual Serial Ports Driver XP you can create any number of virtual serial COM ports in your system which will be virtually connected to each other via virtual null-modem cable. For other Windows applications, virtual serial port pair will be seen exactly as two real serial ports connected via null-modem cable. You can transfer files, exchange data or do whatever you want as they were real serial ports.