3200

The 3200 was planned to be a follow-up to the VCS/2600  Known as Super Stella, it included the next-gen TIA chip, the STIA (with a 10-bit architecture), a Votrax voice chip, a FRANTIC chip, and 8K of RAM.  The few programmers who worked with the hardware said it was even harder to program than the VCS, and development stopped soon after.