I'm glad you're enjoying it! I would be interested in eventually having my emulator available in RetroArch's updater once it's more feature-complete. Right now, the TAS instruction works correctly, like on a Genesis 3. I know that this is technically incorrect since this breaks the game 'Gargoyles', but right now my 68000 interpreter has no way of knowing that that instruction shouldn't work. I may need to add support for that instruction's special bus behaviour so that it has the opportunity to break. What do you mean by 'interrupt and screen blank debugging'? I'm not sure what that's supposed to be.