Go to Settings > Input Mapping . The coin input for MAME is usually "5" (Player 1) and "6" (Player 2). Remap your physical credit button to those keys via the SmartLaunch remapper tool.
However, it is not for everyone. If you lack basic PC troubleshooting skills (BIOS settings, file paths, driver installation), you will hit a wall. And if you have moral objections to ROM piracy, you should look into legal alternatives like Arcade1Up cabs or the Capcom Home Arcade . smartlaunch 48 full
: Cut bandwidth consumption and update time by up to 99%. Your PCs stay updated without the downtime. Go to Settings > Input Mapping
Each fixture needs a .