Changing control map for an Atari 5200 game. How?

[hfgx1]

Can I edit control map for individually games?

I want to play Moon Patrol for Atari 5200
The game requires "A" button to fire and "X" button to jump.

I am using a USB classic NES controller so it has no "X" button. Only "A" and "B".

I edited "/opt/retropie/configs/atari5200/retroarch.cfg" and added:

input_player1_a_btn = 0
input_player1_x_btn = 1

It works.... But can I just do this for individual games, like just Moon Patrol? How do I do it on a per game basis???

Retropie 4.4
RASPi 3B+
lr-Atarti800 emulator
Moon Patrol Atari 5200 game

[mitu]

@hfgx1 Use the RetroArch GUI to re-map your buttons, then save the core remap once you're satisfied with the results - see https://retropie.org.uk/docs/RetroArch-Configuration/#core-input-remapping and the video linked from the page

.

[hfgx1]

@mitu Thank You
That led me to it.
Many thanks.

I got confused because the NES original controller only has 2 buttons A and B, while all the others have more. But I figured it out now.
THANK YOU.

If the mods care to delete this trivial question. It's so obvious.

[Clyde]

@hfgx1 Even the most trivial question may be searched for by others, too, and now they may find this thread for an answer.