Probably, but I have found that to be a black hole of time and effort. Perhaps you’ll figure it out and post! I tried several times to get vi working and was only ever able to get it partially working... at best. I didn’t try it for a trek window though. Sent from my iPhone

The 2BSD tape <https://streaklinks.com/BaMmLKiKytAy22lj8wq2nx50/https%3A%2F%2Fwww.tuhs.org%2FArchive%2FDistributions%2FUCB%2F2bsd.tar.gz> on TUHS (web interface: https://www.tuhs.org/cgi-bin/utree.pl?file=2BSD) has the original ex source -- remember vi is the visual command for ex. It includes binaries that will run on v6 in the tape - you need to build it for v7. I also don't know if the VT05 is in the termcap file. Plus, a Tek 4014 in the termcap is likely to be not very useful for vi mode as it's a DVST (storage terminal), but I think there may be a Tek 4025 definition in there (as I wrote it back in the day and sent it Mary Ann who was the collector of them). That said ex is big and it needs a separate I/D (11/45 class) system, so a while ago, I got Webb Miller's s (mini vi) to compile a while back: https://github.com/udo-munk/s which has much more modest requirements (it is known to have been ported to 8-bit micros under CP/M) but it assumes ANSI sequences so there is no termcap. ᐧ On Sun, Feb 26, 2023 at 4:35 PM Will Senn &lt;will.senn(a)gmail.com&gt; wrote: