4 player on Sega Genesis/Mega Drive - not working

[rhj501]

Hi guys,

I'm a noob to all this so forgive me for asking any daft/stupid questions.

I am trying to play 4 player games on the Genesis/Mega drive but can't get controllers 3/4 to work. My set up works fine on MAME but looks like it needs to be configured for the Mega Drive.

I have searched the forum and read that adding the below to the individual config file for the ROMs should fix this.

input_libretro_device_p2 = "1025"

However, this has not worked and the j_cart games i'm trying to play still do not recognise the 3rd and 4th controllers.

Pi Model: B
Retropie Version: 3.8.1
Built from: Premade SD image from RetroPie website
USB devices connected: keyboard and piHut powered usb hub- 4 iBuffalo USB SNES style controllers plugged into it
Controller used: iBuffalo Snes x 4 all plugged into the USB hub
emulator: lr-picodrive

love what you guys have done for free - i just donated :) Any help would be really appreciated! want to have some mates round to play some classic 4 player mega drive games but can't get it working.
Let me know if any other info needed.

Thanks,

[edmaul69]

@rhj501 if you go into a 4 player game using lr-genesis-plus-gx, then go into rgui (select and x by default) then choose "quick menu" then "controls"and under " user 1 player device type" and "user 2 device type" change the controller to "3 button + team player". Then choose "save game remap file". Then exit out of the rgui and you should have 4 players working

[rhj501]

Thanks @edmaul69. I have got that working on some games but others behave like there is no controller connected.

I have also noted that lr-genesis-plus-gx makes my Pi1 struggle a bit. is there no fix for this within lr-picodrive?

Thanks for the support

[edmaul69]

@rhj501 i couldnt find an option in picodrive for team play or multi tap.