Tiny (
https://josh.com/tiny/) is (old) remote control software for DOS;
from the web page 'the TINY host is written in C and runs as a small TSR
in DOS. It uses the Novell or PCTCP networking API to listen for
incoming UDP requests. It extracts keystroke requests from incoming
requests and sends back snapshots of the local screen via UDP packets.'
Any chance Tiny might work with mTCP? (The website says it does not
work with WATTCP TCP/IP.)