New version (1.2) up and main post updated.
STANDARD edition gains a switch to toggle button 4 from the Jamma edge.
ADVANCED edition gains a switch to toggle button 4 from the Jamma edge, a MONO / STEREO switch, a change of power connector, various silkscreen and copper improvements.
STANDARD edition gains a switch to toggle button 4 from the Jamma edge.
ADVANCED edition gains a switch to toggle button 4 from the Jamma edge, a MONO / STEREO switch, a change of power connector, various silkscreen and copper improvements.