Arcade Output Plugin Instant

Best for: DIY builders using Raspberry Pi or low-cost Arduino boards. Cost: Free (Open Source).

Built into the "MAME Current" core of RetroArch, the Serial I/O plugin allows raw serial output over USB. This is the most granular but most technical option. You write your own Arduino sketch that listens for specific keywords ("COIN_LOCKOUT," "LED_1").

Key Features:

High-end builders use 24v solenoids (stripped from old pinball machines) attached to the sides of the cabinet. An output plugin triggers these solenoids on hard punches in Mortal Kombat, causing the wooden cabinet to physically thud. It feels like you hit the opponent.

ArcadeOutput.OnAck += (msg) => 
    Debug.Log($"Arcade display confirmed: msg");
;

For decades, the arcade experience has been defined by more than just pixels on a screen. The thump of a bass speaker during an explosion, the rattle of a steering wheel on a dirt track, and the wash of cold air over your skin as you pilot a virtual spacecraft—these physical sensations are what transform a video game into a memory. arcade output plugin

In the modern era of DIY arcade cabinets, virtual pinball, and high-end sim racing rigs, recreating this "force" has been elusive. You can have the perfect joystick and a 4K display, but without the rumble, the lights, and the motion, the cabinet feels dead.

Enter the Arcade Output Plugin. This piece of software is the Rosetta Stone between your emulator/game and the real world. It decodes in-game events (like a collision, a gear shift, or a coin insert) and sends specific signals to physical hardware—LEDs, solenoids, fans, motors, and relay boards. Best for: DIY builders using Raspberry Pi or

This article is a deep dive into what an arcade output plugin is, why you need one, how the architecture works, and where to find the best plugins for your specific cabinet build.