I wonder if it were also possible to connect Atari using Kermit protocol. A Kermit client is found on original Atari SDK, that would also require runing Kermit Server on the PC to connect to.
This set up would ressemble how CP/M port to 68K and GEM was developed by Digital Research, I can almost imagine Atari connected to DEC/VAX machines, using Kermit, at those days of development.
Kermit is multiplaform (UNIX / Windows / MAC ...) as that was the original idea behind to share data across various diverse systems.
That would also explain presence of VT52 terminal emulator on Atari `Language Disk', VT52 predates VT100,VT220 as DEC's terminal standard.
ATARI was cheaper to get than a standard h/w DEC Terminal.http://www.kermitproject.org/ck90.html