Change Arcade game from 2 player to 4 player?

[rastaman1201]

Hi,

Is there a way to convert a 2 player arcade game to 4 player if the game is offered in both 2 player and 4 player formats? Do they use the same rom file or are there 2 completely different files for 2 player and 4 player?

I am using Recalbox 7.2.2 with mame and fbneo. Wanting to convert Metamorphic Force and Captian America and the Avengers from to 2 player to 4 player.

Thanks

[barbudreadmon]

@rastaman1201 2P/4P mode is set through dipswitches for this game

[rastaman1201]

Thanks for the response! Managed to change Metamorphic Force to 4P by flipping the dip switch, but player 3 and 4 controls are not working, and I cannot set the controls up for 3P and 4P in RetroArc? When I try to set joystick/button controls it wont allow me too? I am using 2 IPAC2's for a four player arcade machine I built. Other 4P games work just fine.

[barbudreadmon]

@rastaman1201 said in Change Arcade game from 2 player to 4 player?:

I cannot set the controls up for 3P and 4P in RetroArc?

Works fine on my side with FBNeo. Maybe RetroArch's Settings > Input > Maximum Users is set to 2 ? Or maybe you are using MAME ? If you are using MAME, you might want to enter MAME OSD every time you launch a new game to properly set buttons. I might be a bit biased about this since i'm one of its devs, but you should use FBNeo if you want a user-friendly arcade emulator, and especially whose controls work out-of-the-box.

[rastaman1201]

I have the max players set to 5. I think I will try a different rom for the game, are there config files for games in other folders that could be causing this? Thanks for your help, I am still a noob at this but learning quickly.

[barbudreadmon]

@rastaman1201 Did you read my previous answer properly ? As i said, if it doesn't work while Maximum Users has a correct value, then you are probably using MAME and should take a look at its OSD. FBNeo doesn't have this problem of "multiple layers" for input management, everything is done from within RetroArch's menus, and 4P games will work out-of-the-box as long as you have 4 controllers detected by RetroArch.

Note that i don't know much about this ipac2 stuff, so i'm just assuming you have 4 distinct controllers recognized properly by RetroArch here, but that could not be the case.

[rastaman1201]

Sorry forgot to mention I am using fbneo not mame.

[barbudreadmon]

@rastaman1201 said in Change Arcade game from 2 player to 4 player?:

Sorry forgot to mention I am using fbneo not mame.

Then i can only guess that retroarch doesn't see your ipac2 stuff as "4 controllers". You'll need to make sure each of Settings > Input > Port X Controls (where X is the player number) is properly configured : make sure the Device Index in there is pointing the correct device (there might be no need for that if your ipac2 stuff is only seen as a keyboard), and set controls for each port.

[rastaman1201]

Thanks for the response.

I checked the Settings - Input - Port Controls 1-4 and they are all mapped as Xbox controllers #1, #2, #3, #4. When I go to Quick Menu - Controls - Port Controls, players #3 and #4 have no buttons assigned and it will not let me add them. Its weird...all of my other 4 player games are working just fine.

I am going to try a new rom file when I have time and see what happens. I will let you know.

Thanks

[barbudreadmon]

@rastaman1201 said in Change Arcade game from 2 player to 4 player?:

I am using Recalbox 7.2.2

I just noticed the version, that's your issue here : there was a bug until april 2021 preventing 4P on Metamorphic Force

[rastaman1201]

Oh really...ok thanks for letting me know. I will update and let you know.

[rastaman1201]

The update made the game work! Thanks

But now some Dreamcast games are not working...?