Rapid Fire Unit
From Sega Retro
The Rapid Fire Unit is a small device that is inserted between a two-button controller and the Sega Master System. It provides an auto-repeat capability for the control buttons which saves a lot of wear-and-tear on fingers for games like Astro-Warrior. The auto-repeat could be turned on for each button independently.
Switches to turn on/ | off auto-repeat Plug for V system ----------------- | | | V | 2 [X ] | --- | | | |=======| RAPID FIRE [<- Plug for --- | | controller | 1 [ X] | | | ----------------- ASCII art by Brett Carver
This unit was seen offered through Sega in their early "SEGA Challenge" newsletters. Buying 3 games would get you the item. It was also available via retail ($8.50), and packaged with the Control Stick as the "Rapid Fire Control Stick" ($??.??).