[quote=87285]Have you got this solved? I haven’t been able to get 5200 roms to work either (or atari 800 for that matter).[/quote]

I haven’t seen this thread before now, but I’ve had no trouble at all getting Atari800 to work – I can play an 400/800/XL/XE games just fine, either as cartridge roms or disk images (.atr files). I only have a handful of 5200 roms but they play fine as well.

I installed the 3.0 Beta 1 SD image on my Pi 2, and simply added the system rom files and game roms and disk images to the appropriate directories. The key is having actual Atari OS roms. Press F1 the first time you load Atari800 and navigate the menus to set the file paths for system roms,cartridge roms and system OS roms; set system configuration options (OS version, memory settings, etc), and screen display options, controller configuration, etc.

PM me if you have specific questions (except where to get roms).