The Intellicart is a recently-produced RAM-based cartridge for the Intellivision, designed and sold by Chad Schell. It provides 64Kx16-bit of memory for games. Through a clever bankswitching scheme, modern software can use all 64K words. It is also capable of playing nearly all existing games. The few it cannot play without modification require 8-bit RAM.
This is currently an anchor page. It would be good to put the Intellicart technical documentation here.