multiple button config

[jsawhite]

So I've tried to search and also looked through the wiki and can't seem to find my answer.

Here's what I want to do:

When I used a Windows PC and MAME, I set it up so neogeo games were configured so that it appeared to be a 6 button control scheme... Let me explain.

For example in a fighting game in neogeo they were configured this way:
light kick = a
medium kick = b
heavy kick = a+b

I didn't want to have to push 2 buttons for heavy. I set it up so that button a could either be button a on the controller or button c, and button b could either be button b on the controller or button c. This way when I hit button c it would be both a and b.

TLDR;
how do you configure 2 different physical buttons to be the same virtual button in an emulator (specifically lr-fba)? Seems that the cfg files only want you to define 1 physical button. Can you put the config line in twice? And can I have one physical button defined for 2 virtual ones?

[dankcushions]

@jsawhite for lr-fba-next, there is a core option that sets the neogeo pad to either gamepad or arcade (not sure what that does.. maybe this?), and additionally there are various combo macros. i think this is where you should look... i'll have a look myself later as this sounds like a cool idea!