The is part of the RetroMatic 2000 project.  See the index page for other posts.

I’ve done some recent repairs and improvements:

• replaced the damaged Arduino Nano
• fixed a problem with the video sync (I’d incorrectly connected two pins when I changed the Nano)
• reattached the displays with bolts as the hot-glue kept failing
• added YUV support from the external phono sockets for my TI99/4a

I decided a quick video would explain these all best:

In the video I mention a new project by ramapcsx2 involving the GBS8200 / HD9800, which is well worth checking out.