The NeoGeo SNAC adapter allows for interfacing the NeoGeo and Jotego arcade cores with the NeoGeo AES arcade fighting stick andNeoGeoCD controller. Aftermarket DB15 arcade sticks/controllers should also be compatible as long as they are wired to work with theNeoGeo. The NeoGeo multitap is also supported.
The adapterprovides zero input lag for the controllers. The adapterconnects to the USB 3.0 port on the IO boards.Note: not compatible with Analog IO boards older than version 6.1.The adapter is a standalone deviceand should not be used with any other SNAC board.

Download the DB9 version 20260607 of the NeoGeo core (avoid newer releases20260609 and20260611)

Run update_all to download the latest Arcade cores

Connect theadapter and extension cable to the USB 3.0 port on the IO board

Select DB15 as the controller within the NeoGeo core menu (User IO Joystick -> DB15)

Select 2 players within the NeoGeo core menu (User IO Players -> 2 Players)

Select MVS as the system within the NeoGeo core menu (System Type -> Arcade (MVS))

Select DB15 as the controller within the Arcade core menu (User port -> DB15 Joystick)