Difference between revisions 7927591 and 8171028 on enwiki

< previous diff
next diff >
Sega Mega-CD5555555
The '''Sega Mega-CD''' ([[Japanese language|Japanese]]: &#12513;&#12460;CD) is an add-on device for the [[Sega Mega Drive]] released in [[Europe]], [[Australia]] and [[Japan]]. The [[North America|North American]] version is called the '''Sega CD'''.

The device will allow the user to both play CD audio discs and specially designed game CDs. It can also play [[CD plus G|CD+G]] discs.

(contracted; show full)

===Europe===
In Europe the Mega-CD was overpriced. It was released in [[April]] [[1993]] in the [[United Kingdom]] for £270 (over €400 now). Only 4% of European Mega Drive owners bought a Mega-CD because of its price.
Unlike The [[Mega Drive]], which was a very successful console in Europe, only 60,000 of the 70,000 Mega-CD's shipped to Europe were sold by August 1993. 

Some European countries ([[Spain]] for instance), wouldn't get the original Mega-CD, but the Mega
  -CD 2, which also slowed sales. 

===Australia===
The [[Australia|Australians]] got their Mega-CD on [[19 April]], [[1993]].

==Models==
The following models were released:
*Sega Mega-CD I (Sega CD I in North America)
*Sega Mega-CD II (Sega CD II in North America). Designed for the Mega Drive/Genesis II and to reduce manufacturing costs
*JVC Wondermega ([[Xeye]] in North American release, never released in Europe), was a all-in one Genisis /Sega CD unit
*Sega Multimega (called Sega CDX in North America). A portable CD player that plays both Mega Drive and Mega-CD games
*Pioneer LaserActive Sega CD module, an add-on device you could add to a Laseractive Pioneer [[Laserdisc]] player

==Technical Specifications==

===CPU===
Main CPU: [[Motorola 68000]] 16 bit processor running at 12.5 MHz

<i>(Same as the Mega Drive/Genesis. Acts as a coprocessor along with the Genesis CPU. One must note that the Genesis clock speed is slower (7.9 MHz))</i>

===Graphics===
* Graphics Processor: Custom ASIC
* Number of simultaneous colours on screen: 64 (Using programming tricks, this limit is increased to 128 colours via HAM "Hold and Modify")
* Colours available in Cinepak and TruVideo modes: 128 to 256 colours
* Video size from 1/4 to full screen
* Advanced compression scheme
* Software-based upgrade

===RAM===
* Main RAM: 6 Mbit 
* PCM samples: 512 Kbit 
* CD-ROM data cache: 128 Kbit 
* 64 Kbit Internal Backup RAM

The Mega  -CD also features sprite enhancement effects such as scaling and rotation, similar to that of the [[Super Famicom]]/[[SNES]] Mode 7.

===Storage===
* 500 MB CD-ROM discs (equivalent to 62 min of audio data)
* 1/4 screen B/W footage video: 1.5 to 4 hours
* 1/4 screen color footage: 45 minutes
* CD-ROM drive transfer rate: 150 kKbytes/s (1Xx)
<i>(Above specs prior to compression)</i>

===Bios===
* Size: 1 Mb
* Used for games, CD player, CD+G and karaoke
* Access time: 800 ms

<table border="1" cellpadding="3" cellspacing="0">
<caption>'''Bios Revisions'''</caption>

<tr><td>Bios Version <td> Machine</td></tr>
<tr><td>1.00<td> Original Mega  -CD</td></tr>
<tr><td>2.00<td> Mega  -CD  2 (Sega CD  2 in North America)</td></tr>
<tr><td>2.05<td> Mega  -CD  2</td></tr>
<tr><td>2.10<td> Mega  -CD  2</td></tr>
<tr><td>2.21<td> Sega Mega LD (Japan), Sega Multimega (Europe), CDX (North America)</td></tr>
</table>


===Audio===
<i>The Mega  -CD adds 10 extra sound channels to the existing Mega Drive Z80 [[SPU]].</i>

* Sound format: Stereo PCM
* Sound channels: 8
* Maximum sample rate:  32 KHz (44.1  KHz for CD-DA)
* 16 Bbit [[DAC]]
* 8Xx internal over-sampling digital filter
* Frequency Range: 20  Hz - 20 KHz
* Signal-to-Noise Ratio: > 900  dB @ 1K
* Channel Separation: > 900 dB
* Output: RCA stereo Pin Jack x2 (L/R) / SCART cable

===Other===
Dimensions: 301mm x 212.5 x 112.5</br>
Weight: 1.4 kg (3.1 lbs)

==External Links==
*[http://www.consoledatabase.com/consoleinfo/segamegacd/index.html Console Database] - Sega Mega  -CD/Sega CD

[[de:Sega mega-cd]]
[[fr:Mega-CD]]
[[ja:&#12513;&#12460;CD]]

[[Category:Video game consoles]]
[[Category:Sega]]