RetroHQ Mega Multi [Sega Mega Drive]

Mega Multi Adapter by RetroHQ – An all-rounder for Sega controllers

At the end of 2024, RetroHQ launched the Mega Multi Adapter, a versatile accessory that originally emerged as a by-product during the design of the Game Drive for the Atari 7800. The result should especially please those who enjoy gaming with classic Sega controllers – such as those from the Mega Drive or the Master System – and want to use them on various home computers as well.

Compatibility and supported systems

The adapter allows Sega controllers to be used on the following systems:

• Atari ST
• Atari XL/XE
• Amiga / CD32
• C64 / VC20
• Sinclair ZX Spectrum (Kempston-Interface)

It supports not only standard functions but also multiple fire buttons—a real advantage for modern homebrew titles or action games. Particularly handy: in games where jumping is normally triggered by pushing the joystick up, this function can easily be assigned to a button.

Controllers and Modes

Whether it’s the classic Master System D-pad or the 3-button or 6-button Mega Drive pad, the adapter recognizes all standard models. Thanks to an integrated LED indicator, the operating mode can be selected directly on the device, and switching between modes is conveniently handled via the controller itself.

Operating modes

• STD: Atari ST, Atari XL, Amiga, Kempston (ZX Spectrum)
• ALT: C64, VC20
• CD32: Amiga CD32 mode (e.g., for games with extended input)

In addition, depending on the mode, the following sub-modes are available for jump control:

• 1: In addition, depending on the mode, the following sub-modes are available for jump control:
• 2: Jump using the B button and the D-pad (Up)
• 3: Jump only with the B key

Button layout for CD32 mode (6-button controller)

In CD32 mode, a Mega Drive 6-button controller is mapped to the Commodore Amiga CD32 buttons as follows:

• A = red
• B = blue
• C = forward
• X = green
• Y = yellow
• Z = reverse
• MODE = Play/Pause

This button layout allows for comfortable use of the Mega Drive controller, even with games that utilize the extended functions of the CD32 gamepad.

Light gun support

Lightgun fans haven't been forgotten either—the Sega Lightgun is supported on the Amiga, C64, and Atari XL/XE. Depending on the system, there are various sub-modes to ensure compatibility with different games and gun types:

• Amiga: Trojan (M1), Actionware (M3)
• C64: Magnum, Cheetah, MARPES (M2) / Stack (M1)
• Atari XL/XE: M4

Device configuration

Configuration is performed directly via the connected controller:

1. Press the START button for one second → LED starts flashing.
2. Mit dem Steuerkreuz:
   • hoch/runter: Modus wählen
   • links/rechts: Sub-Mode wählen
3. Auto-Feuer aktivieren:
   • Beliebige Taste (A, B, C, X, Y oder Z) gedrückt halten
   • Mit Steuerkreuz hoch/runter eine der vier Geschwindigkeitsstufen auswählen
   • LED blinkt 1–4× je nach gewählter Stufe
4. Finally, press START again to save.

Conclusion

The Mega Multi Adapter is a true all-rounder for retro fans who want to use their Sega controllers across a range of systems. Whether for platformers, shooters, or light-gun games, the compatibility and configuration options are impressive. It is a powerful accessory for anyone who frequently switches between vintage home computers or simply wants a more comfortable gaming experience.

In Germany, the adapter is available exclusively from the Dragonbox Shop for €26 (August 2025: out of stock).