I've been getting some questions on the board's "mute" line (yellow wire).   The mute line is fully functional on all boards I shipped. The reason I had not mentioned it in the installation instructions is because initially I had designed it to be used with AV mods.   If RF is still used (which is my personal preference btw), the mute can still be used by connecting it directly to pin 13 on the TIA (both PAL and NTSC).   The caveat is that the audio will be grounded during pause. In my t