NeoGeo to Sega Adapter (Bliss-Box Bridge Universal Adapter)

How the NeoGeo to Sega Adapter Works

The Bliss-Box Bridge Adapter uses a communication protocol called LLAPI(Low-Level API). LLAPI was originally developed for internal Bliss-Box products, but it is now fully open-source for the community. All modern Bliss-Box adapters support LLAPI, allowing the Bridge to read the controller’s raw data and translate it into the format required by the output device—acting just like a native controller.

Once connected, the Bridge communicates seamlessly between your Neo Geo, Famicom, Atari 5200 and your Sega console.

Supported Bliss-Box Adapters

 

Supported Sega Consoles

  • Sega Master System
  • Sega Mega Drive/Genesis
  • Sega Saturn
  • Sega Dream Cast


Features

  • Wide peripheral support
    Works with keypads, paddles, joysticks, arcade sticks, and standard controllers.

  • Console-synced timing
    Latency remains tied to the original console’s timing for accurate input response.

  • Flexible controller mapping
    Pre-flashed and runtime mapping options available.

  • Full Bliss-Box feature set
    All LLAPI-enabled adapters unlock the complete range of Bliss-Box capabilities.

     

    Setup Guide

    1. Connect your Neo Geo, Famicom, or Atari 5200 controller to the Bliss-Box adapter using the DB15 cable.

    2. Plug the adapter’s USB output into the Bliss-Box Bridge.

    3. Ensure the Bridge firmware is flashed with the retro Firmware

    4. Connect the Bridge to your Sega console with the correct output cable.

    5. Your controller should now register as a native Sega controller.

     

    Where to Buy

    You can purchase the Bliss-Box Bridge and compatible DB15 cable directly from our online store: Visit Bliss-Box.com. You will need both a Bridge and an Adapter that supports LLAPI. 

     

    Related Adapters

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    Effective Date: September 2025

     

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