The Megadrive is Sega's best console in my opinion (the Dreamcast comes close, but not quite!). Very well designed for the day with many excellent arcade conversions. I no longer own a Megadrive since my move to Japan, however I performed a couple of modifications that may be of interest.
These pages were rescued from my old website and need rework, so the layout is not perfect.
Unfortunately I no longer have a Megadrive collection. If I get back into owning games for the system again then I will cover these modifications for the Megadrive 2.
The Megadrive was originally called the Megadrive outside of the US. The name was changed to the Sega Genesis in the US due to another company using the name Mega Drive.