I got rid of mine at a garage sale in about 10 years ago. (Before I started
restoring my junk.)
I had a Trendata1000, which was similar to the IBM 2741. It had a real IBM
Selectric Terminal with Trendata's custom electronics. Many members of The
Northwest Computer Society (Seattle) bought refurbished Trendata1000s from a
local Computer Land store for about $900.
Here is a photo of my Selectric Terminal and my SWTPC system in 1978.
http://www.swtpc.com/mholley/MySystem/MySystemPhoto.htm
I still have the IBM reference manual for the 2741 Communitations Terminal.
It is 20 pages on how to write a driver for the 2741. I also have the
documentation on how to connect it to a SWTPC 6800 with no special hardware.
I normally used it for a printer but it also worked as a terminal.
Here is a description of my computer that I wrote in 1978.
http://www.swtpc.com/mholley/MySystem/MySystem.htm
Michael Holley
www.swtpc.com/mholley