Yes. The Harmony Cart and the UnoCart/PlusCart both have ARM chips. Games have b...

Yes. The Harmony Cart and the UnoCart/PlusCart both have ARM chips. Games have been made that make full use of the chip. Probably the most impressive IMO being Robotron from ChampGames.

The PlusCart also includes a WiFi chip for Internet access.

Exciting times in the world of the Atari2600.