Editing PC Engine SuperGrafx (section)

==Hardware==
Compared to the PC Engine, the SuperGrafx has four times the amount of working [[RAM]] for the main [[CPU]]. Its main upgrade is an additional video chip with its own video RAM, with a priority controller chip, which allows the output of both video chips to be combined in various ways. This gives the SuperGrafx twice as many on-screen sprites as the original PC Engine and support for two independently scrolling background layers opposed to the PC Engine's single layer.[[File:PCEngine SuperGrafx with SuperCDRom2.jpg|thumb|250px|SuperGrafx with the Super CD-ROM² peripheral]]

Since the SuperGrafx was produced and marketed as an upgraded PC Engine model rather than as a new platform, it was backwards compatible with standard PC Engine [[HuCard]]s in addition to its own. However, SuperGrafx-specific HuCards were expensive compared to standard HuCards, in some cases approaching as much as $110 [[United States dollar|USD]] at retail.

The SuperGrafx is also compatible with the CD-ROM² System add-on (via the ROM² Adaptor), as well as the Super CD-ROM² add-on. No CD-ROM² format games were produced that took advantage of the SuperGrafx's added capabilities.