@stonemp What did you have to install to get the Atari800 emulation working? I don't care about 5200 but they seemed to get mentioned together. I downloaded RetroPie 4.3 a few weeks ago and followed directions but no-go. Granted, the directions & video I saw were for the 3.7 version of RetroPie.
I have all of the Atari ROMS and a bunch of game images (because I emulate atari800 on my Windows PC).
Is there more to the installation then copying ROMs and program image files?
I've visited a ton of links...there's a sea of information out there I'm drowning in.
What part am I missing?