Norton Commander "Link" between DOS and Win10 computer

This setup is used for transferring files between an old MS-DOS computer and a modern computer like Windows 10. Both sides are using Norton Commander only one of them is running in a DOSBox.
All was tested on DOS 6.22 with Norton Commander 5.5 running on one side and Windows 10 Pro 1809 with DOSBox 0.74-2 running on the other side of a (serial) nullmodem cable.

How to use "Link" in Norton Commander between an old DOS computer and a Windows 10 computer with Norton commander inside a DOSBox.

• Use a (serial) nullmodem cable on both computer COM1 ports. DOSBox has not implemented the use of LPT ports. To test it with a parallel port you will need two real DOS computers.
• Set the COM1 port on both computers to the same speed.(9600 is reliable on old computers)
• Open DOSBox and configure "serial1=directserial realport:COM1". You can do this by typing " serial1 directserial realport:COM1" (This is confusing because you are using a cable called nullmodem and there is also the (wrong) option to go for "serial1=nullmodem")
• Check the setting at the dosbox command prompt with "serial1"
• Better to set this in the dosbox config file.
• Restart dosbox and check in the dosbox terminal (The black second screen behind the DOSBox screen) if the COM port is used ok. If not, a connection in Windows might prevent DOSBox from taking the line.
• Start Norton Commander 5.5 on both computers and open the menu with F9 and open the "Left" or "Right" panel, scroll down and open "Link".

Screenshot of Norton Commander 5.5 in DOSBox on Ubuntu 18.04.2 LTS

• Choose Master on one side and Slave on the other side and press Link on both sides.

Now the master computer has a panel that has files on the other computer and files can be copied from one computer to the other and back.