Hey , that worked on the 800. I had a 400 and I forget the 800 had 2 cart slots. I'm assuming that is what that's about?
The Adam is not a huge deal. It's a total nostalgia thing (I had access to a lot of 8-bit computers growing up) but aside from a slightly better version of Donkey Kong, there really isn't much there. I just assumed it would be easier than a CHD based machine to do.
Anyway, thanks for the help. I'll play around with the command line parameters as I would like to use this for more modern CHD stuff and I haven't tried any of that yet. I'm getting back into emulation after about 10 years and a lot has changed. MESS was still it's own thing back when I was running anything. Haha.