I picked up a Master System 2 cheaply and since it only supports RF as the video out I thought I would have a go at modding to support at least composite video out. The version I had used the Sony CXA1145 video chip. This seems to be a fairly common video chip found in a few consoles so it is well documented on what it does. On the SMS Power forums I found the following schematic:

I have had the 3D Adaptor for the Master System for a while now along with a pair of 3rd party glasses. Testing out the 3D using the 3rd party glasses never seemed to work quite right, so I decided to get a pair of the official 3D glasses. Looking on eBay the cheapest glasses I found (including shipping) came with the 3D adaptor for the Mark III. Having a look into whether or not the glasses would be compatible or not with the Master System I didn’t find much about the Mark III’s 3D abilities anywhere. So I decided to chance it anyway.