Sega Genesis US/JP Region Modification

This does exactly what it says, allowing you to "modify" the region of your system.  Specifically this means that you can play normally locked out cartridges on any Genesis or Mega Drive system. 

Some important facts to know about region dependence and modification, including known issues:

 

Systems that I currently will mod with a region switch:

Wanna see what the switch looks like on these systems?  Take a look below....

US/JP, 50/60Hz, S-Video, and RCA mods on a Model 1 Genesis

S-Video, RCA, and US/JP switch mods on a Model 2 Genesis

US/JP, 50/60Hz, S-Video, and RCA mods on a Model 1 Genesis