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Sega CD

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Title Screen

Sega CD

Also known as: Mega CD (JP/EU)
Developer: Sega
Publishers: Sega, Tec Toy (BR)
Released in JP: December 12, 1991
Released in US: October 15, 1992
Released in EU: April 19, 1993
Released in BR: October 1993


RegionIcon.png This game has regional differences.
Carts.png This game has revisional differences.


The Sega CD was Sega's answer to the PC-Engine CD in Japan. While it had fairly-decent third-party support and floated in Japan (where the Mega Drive was never in first place), Sega of America and Sega Europe's insistence on shoving out FMV games and the popularity of the Super Famicom in Japan meant it could not be successful anywhere for long. In fact, it's now mainly remembered for all those FMV games.

It had a number of different variants:

  • CDX (US)/Multi-Mega (EU)/Linguaphone Education Gear (JP): an all-in-one Genesis, Sega CD, and portable CD player.
  • Wondermega (JP)/X'eye (US): a Genesis and Sega CD in one unit, usually with other extra features. Both Sega and Victor produced the Wondermega, whereas Victor's parent company JVC produced the X'eye. Victor also produced a later Wondermega M2.
  • Mega LD: an add-on for the Pioneer LaserActive Laserdisc player (the LaserActive name is often incorrectly used to describe the Mega LD; a PC-Engine unit was also made) which allows playing Genesis, Sega CD, and "Mega LD" (basically a Laserdisc with Sega CD code) games. These Laserdisc games constitute their own separate software library and should be counted as a separate console.
  • Aiwa Mega CD: a rare Japanese unit integrated into an Aiwa portable stereo.

Regional Differences

Hmmm...
To do:
  • See if any of these BIOSes will just load arbitrary code (not check the game region)
  • Upload the music tracks.

There are many different versions of the Sega CD BIOS, each featuring their own boot screens and UIs, and each running on a different set of Mega Drives.

The Intro Type and UI Type numbers are arbitrary and provided for expository purposes only; they do not represent an official order.

System Will this Mega CD run if connected to a Mega Drive that comes from... Intro Type UI Type
Japan? Asia? US? Europe?
Japanese Mega CD 1 with BIOS v1.00g Yes Yes Yes Yes 1 1
Japanese Mega CD 1 with BIOS v1.00l Yes Yes Yes Yes 1 1
Japanese Mega CD 1 with BIOS v1.00o Yes No No No 1 1
Japanese Mega CD 1 with BIOS v1.00p Yes No No No 1 1
Japanese Mega CD 1 with BIOS v1.00S Yes No No No 1 1
Asian Mega CD 1 with BIOS v1.00S Yes Yes No Yes 1 1
US Sega CD 1 with BIOS v1.00 No No Yes No 2 2
US Sega CD 1 with BIOS v1.10 No No Yes No 2 2
European Mega CD 1 with BIOS v1.00 No No No Yes 3 1
Japanese Mega CD 2 with BIOS v2.00c Yes Yes Yes Yes 4 1
US Sega CD 2 with BIOS v2.00 No No Yes No 5 3
European Mega CD 2 with BIOS v2.00 No No No Yes 6 3
US Sega CD 2 with BIOS v2.00W No No Yes No 5 3
European Mega CD 2 with BIOS v2.00W No No No Yes 6 3
US Sega CD 2 with BIOS v2.11X No No Yes No 5 3
US CDX with BIOS v2.21X No No Yes No 5 3
European Multi-Mega v2.21X No No No Yes 6 3
Japanese Linguaphone Education Gear Yes No No No 6 3
Japanese Mega LD with BIOS v0.98 Yes No No No 9 Inaccessible
US Mega LD with BIOS v0.98 No No Yes No 9 Inaccessible
US Mega LD with BIOS v1.04 No No Yes No 9 Inaccessible
Japanese Mega LD with BIOS v1.05 Yes No No No 9 Inaccessible
Japanese Victor Wondermega Yes  ?  ?  ? UNKNOWN
Japanese Sega Wondermega with BIOS v1.00W Yes No No No 7 1
Japanese Wondermega M2 with BIOS v2.00 Yes No No No 7* 4
US X'Eye with BIOS v2.00 Yes Yes Yes Yes 8 4
Aiwa Mega CD Yes Yes No No 4 1
(Source: GerbilSoft (region compatibility))

Intro Types

Note that there may be some version number and slight copyright differences between minor revisions of a major revision, though everything else is still the same. An example would be the differences between the Sega Wondermega and the Wondermega V2.

1

Mega CD-JP-title.png

The Japanese Mega CD logo animated on top of a sky backdrop. The music in this version, a short piano/strings loop, is the most common background music across all revisions of the BIOS.

A slight variant of this intro, complete with music, appeared in the first-party Sega CD game Panic as can be seen here.

2

Sega CD-title.png

The Sega CD and SEGA logos animated over a space backdrop. The music in this one is unique to the US Sega CD 1 and is a loop of electronic rock-type music. It should also be noted that the first part of the animation and music don't loop.

3

Mega CD-EU-title.png

The European Mega CD Logo and the SEGA logo being animated over a space backdrop similar (but not identical) to the Sega CD 1 BIOS. The music loop is the same as the Japanese Mega CD 1 BIOS.

4

Mega CD 2-JP-title.png

The Japanese Mega CD 2 logo (the only region with a Mega CD 2 logo) and the SEGA logo being animated over a backdrop with some geometric solids and Sonic doing one of his trademark poses. The music is the same loop from the Japanese Mega CD 1 BIOS.

5

Sega CD 2-title.png

The Sega CD and SEGA logos animated over the same space backdrop from the original Sega CD BIOS. The animations are nearly (if not exactly) the same as the Japanese Mega CD 2 BIOS, but since the backdrop is different the animations may look odd at times. The music in this version is also unique to it, and is an electronic rock-type music.

6

Mega CD 2-EU-title.png

The European Mega CD logo and the SEGA logo animated over a backdrop similar to the Japanese Mega CD 2 BIOS, with a yellow CD instead of Sonic. While the Japanese BIOS had the logos layered behind the shapes at times, the European BIOS removes that and everything is layered on top. The animations are also nearly (if not fully) identical to the other versions. The music loop is also the same as the European Mega CD 1 BIOS, which in turn is the same as the Japanese Mega CD 1 BIOS.

7

Wondermega-title.png
Victor Wondermega M2-title.png

The Wondermega BIOS is, graphically, different from all other BIOS types, as the BIOS has a "W" logo animated against a backdrop of what appears to be a sphere with a hole in it, above a static Wondermega logo. The music is the same loop as the one from the Japanese Mega CD BIOS, though the piano sample seems to have been modified somewhat.

  • The Victor Wondermega M2 is a special case. While the UI may be the same as the X'Eye, the animation is exactly the same as the Sega Wondermega. Just the message and copyright info were modified on the startup screen.

Copyright

Wondermega Wondermega M2
©SEGA 1991 Ver 1.00 ©VICTOR Co./SEGA 1993 Ver 2.00

Message

Wondermega Wondermega M2
スタートボタンを押して下さい
[Press the Start button]
ディスクチェック中
[Checking Disc]

8

X'Eye-title.png

The JVC X'Eye BIOS is virtually identical to the Wondermega BIOS, animations, music and all, except the graphics for the "W" logo are now an "X", and the Wondermega logo has been replaced with logos for JVC and the X'Eye.

9

Laseractive-title.png

No animations with this one. All this has is the Pioneer logo, a basic select screen, and copyright information. This screen does not respond in emulators or actual Mega/Sega CD systems, possibly due to the differences between the Mega LD and Mega CD hardware.

UI Types

1

Mega CD-JP-UI.png

2

Sega CD-UI.png

3

Sega CD 2-UI.png

4

Victor Wondermega M2 X'Eye
Victor Wondermega M2-UI.png X'Eye-UI.png

There are a few changes between the Victor Wondermega M2 and X'Eye, like the addition of the "Pitch" button and "MUSIC" being displayed at the top.