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Over its lifetime, the Genesis came in three different models, each of which had several motherboard revisions. For more details, see [[Sega Genesis Hardware]].

<br />

They consisted of a Mega Drive/Genesis with the [[Sega CD|Mega-CD]] addon.

*[http://retroconsoles.wikia.com/wiki/Sega_CDX/Multi-Mega Sega CDX/Multi-Mega]

*[[Pioneer LaserActive]] used an add-on module consisting in a Mega Drive/CD combo.

===Model 1 US===

There are a few different types of power supplies for the model 1. The important distinction is the output voltage: some provide 9V, others 10V. Beyond that, they differ by input wattage, which does not matter to the functionality of the console and only affets power consumption. Check the voltage rating printed on the bottom of the model 1 for the correct voltage before using a power supply you find in the wild.

*The '''Power Base Converter''' adds compatibility with both cartridge and card-based games on the Sega Master System in an add-on that also adds compatibility with the 3-D Glasses through a port in the front. Master System or Genesis controllers may be used for gameplay, as they share the same type of input jack. Both North American and Japanese versions are designed to only fit the Model 1, while an additional  version fitting the Model 2 Mega Drive was released in Europe.

*[[Sega Genesis Cartridge]]

*[[Sega Genesis Hardware]]