Requirements

Remote debugging requires two computers, the host running Microsoft Windows NT and the target running Windows NT. Serial debugging requires a serial port connecting the host and target computers. Debugging through a named pipe requires that both computers be connected to a common network that is supported by Windows NT. Network debugging is faster and does not require a special cable between the two systems.

To remotely debug using the serial ports, connect the host and target computers with a null-modem cable plugged into the serial ports on the two computers. A null modem is a serial cable that connects the transmitting line at each end to the receiving line at the opposite end. You cannot use an extension cable with  straight-through  connections.

Most computer stores stock or can assemble a null-modem cable for you with the correct wiring and the appropriate connectors for your host and target computers.