Sega MarkIII to Megadrive/Genesis cartridge adapter

A cartridge adapter circuit to play Sega MarkIII games on a Megadrive/Genesis console.

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You want to play Sega MarkIII/Japanese Master System games but you only have a Genesis/Megadrive console? No problem, the system is backward compatible. All you need is a cartridge adapter.

  • Supports 44 pin Sega MarkIII/Japanese Master system cartridges
  • Two layer white PCB, gold plated.
  • Fully assembled and ready to use.
  • Tested on Genesis/Megadrive models 1 and 2. (American and Japanese)
  • Tested on the Hyperkin Retron5
  • Not compatible with Genesis model 3.
This product is an implementation of the following open source project: SMS to Megadrive/Genesis cartridge adaptor


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In stock : Ships within 5 business days unless noted otherwise (out of stock, pre-order, holidays, etc).
DescriptionMarkIII to SMD cartridge adapter (assembled PCB)

We normally ship within 5 days (excluding week-ends and holidays) after payment.
Prices are in US dollars and are subject to change without notice.

Download(s) & Link(s)

Adapter schematicmarkIII_to_smd_schematic.png

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Product photo

A cartridge adapter circuit to play SMS games on a Megadrive/Genesis console.

Out of stock