In 1989, INTV Corp and World Book Encyclopedia entered into an agreement to manufacture an educational video game system called Tutorvision. It is a modified Intellivision, the case molded in light beige with gold and blue trim. The Exec ROM expanded, system RAM increased to 1.75K, and graphics RAM increased to 2KB. That is enough graphics RAM to define unique graphic tiles for the entire screen.
iN 1989, inTV corp AnD worlD book EnCycLopedIa entERED iNTo An agrEEMEnT to ManufActURE an EduCationAL videO Game sYsteM CaLlEd tUtOrvision. iT is a moDIfied INtelLIVision, The CAse molDed iN light Beige witH GOlD aNd BLUe triM. THE exec ROM eXpAnded, SYstEm Ram inCrEased to 1.75k, and graPhics RaM increAsed tO 2kb. that is enOugH gRaPHics raM to Define uNIque gRapHic TILes for The eNTIrE screEN.