This Problem began when I changed from an Analog io board to Dual ram digital io.
If SNAC is enabled when the game is selected, it doesn't get past the Sega logo. If the game is already running and SNAC is turned on in the menu, the core hangs. The problem persists with older versions of the Saturn core, including the single ram core version I'd previously used with the analog IO board. I tested my other SNAC adapters with their respective cores and they work perfectly fine, so the user port does seem to be functioning properly.
https://ultimatemister.com/product/snac-saturn/
I'm using this Saturn SNAC adapter from Ultimate Mister. It has level shifting on board.
Is my adapter faulty?
