it functions with sidwizard just like any other midi interface, mostly play and stop commands are supported and note entry, possibly also some continuous controllers, i did not dive into the manual yet.
there will be one large virtual diskimage inside the cartridge that supports disk operations like saving and loading, so you can work standalone without a diskdrive. of course this will not work for things like games and demos that need the drive processor for more critical operations, but basic save and load operations will always work on the cart.
