The 65816 was used in the SNES but it was only initially 2MHZ and I believe the cpu's are in the cart, not the unit.
Later SNES carts has a 23 or 25MHz cpu. Find out which games had those and you can rape them.
How does this work in 128 mode?
I have a 128D that powers on but I get no screen. Anyone want to take it off my hands? I installed an extr SID chip and have it wired to the RF out connector. So you can only use a composite cable or the 80col RGB cable for output.
Yes, it was working years ago. No idea what's wrong.