[drzaiusx11]

The 2600 had carts with SuperCart/SARA chips added to double the consoles ram (to a whole 256 bytes!)

The 2600's Pitfall II cart even added their own co-processor (Display Processor Chip/DCP) providing advanced music generation, improved graphics handling, and increased data storage.

I truly love the ingenuity involved in enhancing and prolonging the life of game systems and the bypassing of inherent limitations. True hacks in the literal sense. Some beautiful, some funny (in retrospect like the stun chip I mentioned.)