Question for the devs...what is "NeGcon with Rumble"

[Isamu]

Hello. I just updated to the latest beta and noticed a new option to select a new type of controller called "NeGcon with Rumble". Can any of the devs, or perhaps the dev that implemented this please explain what this is? None of the PS1 racing games support any sort of rumble/FFB when the NeGcon is plugged in and recognized. Just wondering what this does. Thanks and keep up the great work