That sounds right. I've forgotten many of these details. IIRC: DEC had something called "regions" that were bastardized by the screen handlers like termcap et al to do some of the same things. Horton (termcap and terminfo author) or Kent (terminal firmware author) might remember. Clem On Mon, Feb 25, 2013 at 5:30 PM, Johnny Billquist <bqt at softjar.se> wrote: As far as I know, the VT100 do not do insert and delete at all. Those were added in the VT102...