is megaman 9 an actual NES ROM being played as a virtual console thing, or is it just a Wii game with a *lot* of attention to detail re: NES limitations?

@Felthry the latter, there isn't a NES ROM to extract and run on a regular emulator

@Dex Makes sense, I guess. It sure looks like it'd be possible to play on NES though!

@Felthry A NES version was apparently planned at some point going by the Wikipedia article, but they'd have needed some way of getting the new engine running on NES and the game was still far too big for standard NES carts.

@Dex @Felthry

I thought NES carts could have variable sizes?

@Tathar @Dex Yes, but they need a specially-made memory mapper chip on the cartridge if they're over a certain size, and making custom silicon for NES games today is, well, very not worth it. Even an fpga or cpld solution would probably be more trouble than it's worth to develop.

@Felthry @Dex

Is this basically how extended memory works?