The way I see it, the pins on the SGB are cut - the pins on the DMG have the signal split off onto the SGB traces. That way the DMG & SGB both display the same thing.
The SGB would lose the custom palettes/borders, as the cart is read from the DMG - however, you would still be able to change the TV palette by keeping a controller plugged into the SNES (using button combos as standard)
Having an 8 way switch though, seems almost pointless - unless you still want to use the SGB separately. In which case there would be no custom case. And the only way I can think of to easily do an 8 way switch is using a microcontroller.
But then I am a bit of a noob, there could be an obvious idea I'm missing.
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Alternatively, you could put the guts of a SNES controller into a DMG, then run the SGB as normal with LSDJ or whatever - but then its not really a video out, just a different controller. And the DMG would not show the same on-screen info
Last edited by Category (Aug 20, 2014 9:11 pm)