Editing TurboGrafx-16 (section)

==Add-ons==
===TurboGrafx-CD/CD-ROM²===
[[File:PC Engine CD-ROM2 Interface Unit.jpg|thumb|PC Engine CoreGrafx with CD-ROM² and interface unit]]
The ''CD-ROM²'' is an add-on attachment for the PC Engine that was released in Japan on December 4, 1988. The add-on allows the core versions of the console to play PC Engine games in CD-ROM format in addition to standard HuCards. This made the PC Engine the first video game console to use CD-ROM as a storage media. The add-on consisted of two devices – the CD player itself and the interface unit, which connects the CD player to the console and provides a unified power supply and output for both.<ref>[http://www.ign.com/top-25-consoles/13.html Top 25 Videogame Consoles of All Time], IGN. Retrieved June 14, 2010</ref><ref>{{cite book|title=The video game explosion: a history from PONG to Playstation and beyond|last=Wolf|first=Mark J. P.|publisher=[[ABC-CLIO]]|year=2008|isbn=978-0-313-33868-7|page=119|url=https://books.google.com/books?id=XiM0ntMybNwC&pg=PA119|access-date=April 10, 2011}}</ref> It was later released as the ''TurboGrafx-CD'' in the United States in November 1989, with a remodeled interface unit in order to suit the different shape of the TurboGrafx-16 console.<ref>{{Cite magazine|date=December 1989|title=TurboGrafx-CD System|url=https://retrocdn.net/images/d/d6/ComputerEntertainer_US_Vol.8_09.pdf|magazine=[[Computer Entertainer]]|volume=8|issue=9|page=11|archive-url=https://web.archive.org/web/20180925065311/https://retrocdn.net/images/d/d6/ComputerEntertainer_US_Vol.8_09.pdf|archive-date=September 25, 2018|url-status=live}}</ref> The TurboGrafx-CD had a launch price of $399.99 and did not include any bundled games.<ref name="ToysRUs">{{cite news|author=<!--Staff writer(s); no by-line.-->|url=https://news.google.com/newspapers?nid=373&dat=19901205&id=ek1OAAAAIBAJ&pg=2470,1037511|title=Toys R Us weekly ad|date=December 5, 1990|newspaper=The Catoosa County News|access-date=June 17, 2014}}</ref> ''[[Fighting Street]]'' and ''[[Wonder Boy III: Monster Lair|Monster Lair]]'' were the TurboGrafx-CD launch titles;<ref name="RePlay">{{cite magazine |title=Home Games Look Robust at Winter CES Show; "Coin-Op Must Get On Track Fast," Observers Say |magazine=RePlay |date=February 1990 |volume=15 |issue=5 |pages=38–44 |url=https://archive.org/details/re-play-volume-14-issue-no.-5-february-1990-600dpi/RePlay%20-%20Volume%2014%2C%20Issue%20No.%205%20-%20February%201990/page/38/mode/2up}} {{Dead link|date=December 2021}}</ref> ''[[Ys Book I & II]]'' soon followed.

===Super CD-ROM²===
[[File:Super CD-ROM2 with CoreGrafx II (3-4 right view).jpg|thumb|Super CD-ROM² attached to a CoreGrafx II]]
In 1991, NEC introduced an upgraded version of the CD-ROM² System known as the ''Super CD-ROM²'', which updates the BIOS to Version 3.0 and increases buffer RAM from 64 KB to 256 KB. This upgrade was released in several forms: the first was the ''PC Engine Duo'' on September 21, a new model of the console with a CD-ROM drive and upgraded BIOS/RAM already built into the system. This was followed by the ''Super System Card'' released on October 26, an upgrade for the existing CD-ROM² add-on that serves as a replacement to the original System Card. PC Engine owners who did not already own the original CD-ROM² add-on could instead opt for the Super-CD-ROM² unit, an updated version of the add-on released on December 13, which combines the CD-ROM drive, interface unit and Super System Card into one device.

===Arcade Card===
On March 12, 1994, NEC introduced a third upgrade known as the {{nihongo|''Arcade Card''|アーケードカード|Ākēdo Kādo}}, which increases the amount of onboard RAM of the Super CD-ROM² System to 2MB. This upgrade was released in two models: the ''Arcade Card Duo'', designed for PC Engine consoles already equipped with the Super CD-ROM² System, and the ''Arcade Card Pro'', a model for the original CD-ROM² System that combines the functionalities of the Super System Card and Arcade Card Duo into one. The first games for this add-on were ports of the [[Neo-Geo]] fighting games ''[[Fatal Fury 2]]'' and ''[[Art of Fighting]]''. Ports of ''[[World Heroes 2]]'' and ''[[Fatal Fury Special]]'' were later released for this card, along with several original games released under the ''Arcade CD-ROM²'' standard. By this point, support for both the TurboGrafx-16 and Turbo Duo was already waning in North America; thus, no North American version of either Arcade Card was produced, though a Japanese Arcade Card can still be used on a North American console through a HuCard converter.