Dingoonity.org

Well the goal of emulation is to recreate the original experience with all it's flaws.
If you want the games centered that would be an extra added feature not originally in the system.
It also begs the question of how hard this would be to implement. Remember these emulators are mostly just ports, adding a new feature can be challenging if not present in the original emulator it was ported from. Although I think the devs here are probably talented enough to be able to implement this. We'll see what happens.

The goal of emulation is to be able to play retro games, nobody said its to have the original flaws. If the goal was to reproduce the exact same experience than the original, why would they have added the possibility to save / load states, to use autofire, and change the gamepad configuration ? If you can tweaks thoses options with emulation, why not have the same freedom to also correct some mistakes like this annoying off centering problem ?

Like I said those are extra features for user convenience. At first an emulator's goal is to recreate the original system as accurately as possible, after that extra features are implemented.

Thank you, David Knight. I'm testing Stella 3.9.3 on the RG350 with stock firmware. I found one problem to look at.

While you cant see an .a26 file unzipped in the file browser, you can add a .a26 file into a zip file and it will show those zips and load the zipped game inside ok as long as there is just one single .a26 or bin game in each zip. You dont then need to rename the .a26 files. I use winrar to do this. Or can rename the .a26 to .bin and then can also leave unzipped as mentioned.

But I found a problem it seems only if you have a zip file with several roms inside. It does show the zip in the file browser and then open it up and display the contents of all the other roms inside, but the entire choice of which rom to load display screen flickers badly, and the cursor when moving leaves a trail and graphics get messed up. I ran into this during testing using adventure from a good2600 set that has multiple roms inside many of the zips and originally just had converted the 7zip with multiple roms to zip since 7z was not recognized by the file browser. While there is a workaround by the methods above to play, I was wondering if this can be fixed so I dont have to work on reformatting of the roms and zips.