The Sega Mega-CD released as the Sega CD in North America, is an add-on device for the Sega Mega Drive / Genesis video game console. It was designed and produced by Sega, released in Japan on December 12, 1991, North America and Brazil June 1992, and Europe and Australia April 1993. Over six million units have been sold worldwide and production of the unit was discontinued 1996.
The device played CD based games, audio CDs and CD+G discs. There were two versions of the Sega CD produced. The first sat underneath the Mega Drive and loaded the CDs in a motorized tray. The second unit had a top loading CD-ROM drive and set to the right of the console. Both versions were compatible with the Mega Drive and Mega Drive II but will not work with the Mega Drive 3 or Genesis 3.
Six different models were released,:the Mega-CD I, Mega-CD II, Sega Wondermega which had a CD player, with video and karaoke capabilities. Wondermega RG M2 released in Japan only and was identical to the Wondermega. Sega Multi-Mega was a portable CD player that played Mega Drive and Mega CD games, audio CDs, and CD-G discs. And the Pioneer LaserActive Sega Mega-CD module for the LaserActive system.
The unit had a 12.5 Mhz CPU, a graphics coprocessor, 512kb main RAM, 256kb shared RAM, 8kb internal battery-backed SRAM, and 500 MB storage on CD-ROM discs. Sega also released some accessories for the unit. A CD backup RAM cart used for external memory where games could be saved. It had 2045 game save blocks; the Mega-CD only had 125. Other accessories were a light gun and a multi function cartridge called “Megacart” released in 2006.
There were 220 games released for the Sega Mega CD.
Image Caption: Sega CD attached to a Sega Genesis. Credit: Evan-Amos/Wikipedia