Editing Intellivision (section)

===Tutorvision===
{{See also|List of Intellivision games#Tutorvision}}
In 1989, INTV Corp and [[World Book Encyclopedia]] entered into an agreement to manufacture an educational video game system called Tutorvision.<ref>{{cite web|url=http://www.intellivisionlives.com/media/newsletters/news030715.html|archive-url=https://web.archive.org/web/20170728181110/http://www.intellivisionlives.com/media/newsletters/news030715.html|url-status=usurped|archive-date=2017-07-28|title=Intellivision Classic Videogame System July 2003 News|website=www.intellivisionlives.com}}</ref> It is a modified Intellivision, the case molded in light beige with gold and blue trim.<ref>{{cite web|url=http://www.zutco.com/Tutorvision.htm|title=The Virtual Pac-Man Museum|website=www.zutco.com|access-date=2017-03-22|archive-date=2016-07-01|archive-url=https://web.archive.org/web/20160701030150/http://www.zutco.com/Tutorvision.htm|url-status=live}}</ref> The Exec [[Read-only memory|ROM]] expanded, system RAM increased to 1.75K, and graphics [[Random-access memory|RAM]] increased to 2KB.<ref name="google1">{{cite web|url=https://docs.google.com/document/d/13ApQEm1Xw_DcCAaXcQvpFot_BvrzSzeUo95EXCf41uc/pub|title=TutorVision / INTV88 Reverse Engineering Notes|website=docs.google.com|access-date=2017-05-15|archive-date=2020-06-02|archive-url=https://web.archive.org/web/20200602210813/https://docs.google.com/document/d/13ApQEm1Xw_DcCAaXcQvpFot_BvrzSzeUo95EXCf41uc/pub|url-status=live}}</ref> That is enough graphics RAM to define unique graphic tiles for the entire screen.

Games were designed by [[World Book Encyclopedia|World Book]], ''J. Hakansson Associates'', and programmed by [[Realtime Associates]]. [[List of Intellivision games|Sixteen games]] were in production, plus one Canadian variation. However, the cartridges and the Tutorvision were never released; instead World Book and INTV Corporation sued each other. In 1990, INTV Corporation filed for bankruptcy protection and closed in 1991.

An unknown number of later Intellivision SuperPro systems have Tutorvision hardware inside. A subset of these units contain the full Tutorvision EXEC and can play Tutorvision games.<ref name="google1"/>
<ref name = INTV/>