Sega Master System to MarkIII/SMS-J cartridge adapter

A cartridge adapter to play Sega SMS games (non-japanese, 50 pin cartridge) on a MarkIII or Japanese SMS system.

  •  Current version (white)
  •  Front (old version)
  •  Example use (old version)
  •  Example use (old version)


If you own a Sega MarkIII or a Japanese Master System, this adapter enlarges your game library by letting you use non-japanese 50 pin cartridges. Ideal for games without a Japanese version, games you already own, or games difficult/expensive to get from Japan. Also, many titles originating in Japan still support FM sound, so if you have a MarkIII FM sound unit or a Japanese SMS, some games will sound better.

  • Supports 50 pin non-Japanese Master system cartridges.
  • Works on Sega MarkIII and Japanese SMS.
  • Two layer PCB, gold plated.
  • Ready to use, no soldering required.


Buy here

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

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

Related products

Product photo

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

Out of stock