Neo Geo MVS HDMI Mod
A developer programmed an FPGA that is able to pull the audio and video digital signals from a Neo Geo MVS console (before it goes to the digital to analog converter) and convert those signals to HDMI. This process only adds a 100 microsecond delay, which equates to only about 1 frame of video – essentially not noticeable.
The process they went through is an interesting one and I recommend reading it if you’re interested in the inner workings of a Neo Geo.
Unfortunately, this mod doesn’t come as a kit, but the developer has posted all of his code on GitHub. So, if you’re up for a DIY challenge and you have an FPGA, this would be a great project to tackle with an excellent end result.
Here is a video of the mod in action: