Two mice for Lemmings

[boogenheimer]

I am trying to set up a kiosked version of Lemmings with AmiBerry on RetroPie. The game runs beautifully but I'm wondering if there is any way to set up a second mouse as a controller to allow for two player games? I have tried various things but cannot seem to make anything stick.

Secondly, for kiosking reasons I am trying to disable F12 (GUI toggle) and F10 (quit game) keys on the keyboard (needed to enter level codes) but I'm not having any luck. I've left the "default_open_gui_key=" entry blank in amiberry.conf but F12 still works. I cannot find an entry for F10, I assume this is a game specific option and cannot be disabled via the amiberry settings.

Any tips would be greatly appreciated.

[midwan]

Amiberry can support that, but SDL2 currently has support for only 1 mouse in the system.
Until that changes, there's not much I can do I'm afraid. I believe it's in their roadmap for the future...

F12 is the default key for Open GUI, but it can be changed to something else with the option you saw in the amiberry.conf file. If no option is specified there, the default applies. F10 is a game specific one, it's not intercepted by the emulator.
Keep in mind you can also use key combinations (e.g. Ctrl+F12) or game controller buttons, if you want.

[midwan]

Even a serial mouse would need to be handled by SDL2 as a 2nd mouse, and that's where the blocker is. Until they add support for it, we're kind of stuck in this.
You could assign the open GUI command to any key or gamepad button, by editing the config file manually, if you want.

[andyc1864]

Hello Midwan,

I have been in contact with a guy called Ryan who works on SDL. He has indicated that the option for introducing the feature to support two mice should be relatively easy to implement, but they have no plans to do so yet.

He did however say that if anyone were willing to come along with a patch he would be happy to support it through version control.

I don't have the coding skills to do that. Do you think it would be worth reaching out? Having the ability to support two mice for games such as Lemmings and Hired Guns would be awesome!

[midwan]

@andyc1864
From what I understand, they did implement a piece at least towards that direction, but the solution is not complete yet. Check the related issue here, where they mention a commit added to support multi-mouse support: libsdl-org/SDL#6223 (comment)

So it seems like they are (?) moving towards that direction already.

[andyc1864]

Any chance I can PM you and share the SDL email response to my query?

Thanks.

[midwan]

@andyc1864 sure, you can either mail me at midwan at gmail dot com, or find me on Discord (I'm available on multiple servers) or other channels (FB, Signal, etc)