I'm setting up a bartop arcade with MAME and several consoles installed, including the TI-99/4A. I'm using Retropie, and with the latest version, you can install TI99sim using the Retropie setup script (it's located under 'manage experimental packages'). I've never had any luck getting the built-in scraper to work so I'm using Stephen Selph's scraper (with thegamesdb.net as the database) to download game art, and it works for all of the systems except the TI. Googling around a bit, I see that there should be a TI99 folder with a file named gamelist.xml located at /home/pi/RetroPie/roms/ and also at /home/pi/.emulationstation/gamelists/.
Neither of those locations has a TI99 folder on my system. Has anyone else gotten this working, or do any of the Linux experts out there have any suggestions?