I'm not sure how many people read this area, but if you are a TI-99/4, TI-99/4A or Geneve 9640 user, you need to check out this website. It is where most of the support for these computers take place.
Website
https://forums.atariage.com/forum/164-ti-994a-computers/
This is a very very active forum.
Beery Miller
www.9640News.com
--Beery Miller -- 9640 News BBS -- 9640news.ddns.net:9640 --
... A Skydiver is taken by the gravity of his situation.
--- Mystic BBS v1.12 A48 (Windows/64)
* Origin: 9640 News BBS (21:4/109)