Difference between revisions of "Sega Mega-CD"
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Revision as of 14:02, 20 July 2016
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The Sega Mega-CD (メガCD), known as the Sega CD in North America and Brazil, and CD Aladdin Boy (CD 알라딘 보이) in South Korea, is a hardware add-on developed by Sega for the Sega Mega Drive. As the names suggest, it allows a Mega Drive to run compact discs, be it proprietary Mega-CD software, audio CDs or CD+G discs. It also acts as an upgrade to the Mega Drive hardware, sporting an extra processor and extra RAM. The Mega-CD was first released in 1991 and was supported alongside regular Mega Drive cartridges.
Contents
Hardware
The Mega-CD comes in many forms, but in all cases the hardware adds the capability of reading compact discs, technology which in the late 1980s and early 1990s, was becoming a more affordable storage option than the traditional video game ROM cartridge of previous console generations.
A traditional Mega-CD does not act as a stand-alone unit, and needs to be hooked up to a Mega Drive via the expansion port located on the right hand side of the console. Mega-CDs do, however, require their own AC adaptor, meaning that in order to play Mega-CD games, two sockets will be occupied by the upgraded console.
Though one would expect the Mega-CD to simply give the Mega Drive access to compact discs, it in fact adds extra processors, memory and audio features as well, all of which can only be utilised by CD software. The Mega-CD does not, however, solve the issue of graphics, which aside from the ability to scale and rotate sprites on the fly, remain identical to the standard Mega Drive system.
The Mega-CD also offers stereo sound RCA connectors. The Mega Drive on its own will output a monaural audio signal to the television, with stereo only being available through the headphone port located at the front of the console. An external connection from the Mega Drive to the Mega-CD will allow all games to play through the television in stereo.
The Mega-CD can be used in conjunction with a Sega 32X to run one of the six Sega Mega-CD 32X games. Alternatively it can be used to just play regular 5-inch or 3-inch audio CDs.
Models
- Main article: Mega-CD consoles.
Like the Mega Drive, there were two major revisions of the add-on by Sega and several special combination units.
Mega-CD
The original Mega-CD utilises a CD tray, and sits underneath the Mega Drive (or Mega Drive 2). It is a reasonably large add-on designed to be permanently attached to the console at all times.
Mega-CD 2
A cost-reduced model of the Mega-CD was produced and released around the same period as the cost-reduced Mega Drive 2. This version sits on the right hand side of the Mega Drive, though continues to act as a new base for the console, and is a top-loading device. Fewer mechanical parts means less is likely to go wrong with a Mega-CD 2, and is designed to look sleeker and more appealing. The Mega-CD 2 is designed primarily with the Mega Drive 2 in mind, however a plastic extension piece was included to add extra support with an original Mega Drive attached.
Mega Drive combos: JVC Wondermega/X'eye, Pioneer LaserActive, Sega Multi-Mega, and Aiwa Mega CD
- Main articles: Wondermega, LaserActive, Sega Multi-Mega, Aiwa Mega CD.
Combination Mega Drive/Mega-CD units were developed over the course of the Mega-CD's lifetime. The Wondermega and LaserActive are standalone consoles; the LaserActive also plays LaserDiscs. The Multi-Mega is a portable audio CD player that can play Mega Drive and Mega-CD games when plugged in to wall power and a TV. The Aiwa Mega CD is a Mega Drive/Mega-CD packed into Aiwa's consumer-level portable CD stereos.
Development systems
Cross Products SNASM Mega CD
The SNASM Mega CD is a fully featured debugging system developed by Cross Products and officially licensed by Sega for Mega-CD debugging and development. Its features include a debugging interface through a port on the rear of the system as well as CD-ROM emulation through a proprietary SCSI card. The system contains a modified boot-rom which includes all used region combinations for localized debugging. Also available to developers are a number of controls for both the main and sub 68000 CPUs in the Mega-CD. The SNASM Mega CD is used with the SNASM2 family of development programs and Cross Products's SN Server.
Psygnosis PsyQ Mega CD SDK
Psygnosis, a prominent 3rd party developer, developed their own tools for use with the systems which they developed for, including the Mega-CD. The PsyQ development software includes the popular ASM68K and can be used with the Cross Products Mega CD.
Technical specifications
The following are upgrades over the Sega Mega Drive technical specifications.
Processors
- Main CPU: Motorola 68000 16-bit processor running at 12.5 MHz
- 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 (7.67 MHz)
- Instruction set: 16-bit and 32-bit instructions, 16 registers
- Instruction performance: 2.19 MIPS
Graphics
- GPU (Graphics processor): Custom ASIC
- Number of simultaneous colors on screen: 64 (Using programming tricks, this limit is increased to 128 colors via raster effects)
- On-screen colors available in Cinepak and TruVideo modes: 128 to 256 colors
- Video size from 1/4 to full screen
- Advanced compression scheme
- Software-based upgrade
- Sprites/Tilemaps: The Mega-CD features enhancement effects such as scaling and rotation, similar to that of the "Mode 7" effect employed by the Super NES. While Mode 7 only supports the scaling and rotation of tilemap backgrounds, the Sega CD supports the scaling and rotation of both the sprites and the tilemap backgrounds. [5]
- 3D polygon capabilities:
- Geometry performance: Up to 3,333 polygons/sec
- Rendering performance: 960 polygons/sec [6]
Sound
The Mega-CD adds 10 sound channels to the 10 provided by the Mega Drive's sound chips.
- CD Digital Audio
- 2-channel stereo
- 44.1 kHz sampling rate
- 16-bit PCM audio depth
- Ricoh RF5C164 PCM chip provides 8 sound channels:
- Sound format: 8-bit sign/magnitude monaural PCM (with "stereo" support by allowing each channel to have different volumes on both left and right channels)
- Maximum sample rate: 32 kHz
- PCM audio depth: 16-bit[5]
Other specifications:
- 16-bit DAC
- 8x internal over-sampling digital filter
- Frequency Range: 20 Hz - 20 KHz
- Signal-to-Noise Ratio: > 90 dB @ 1K
- Channel Separation: > 90 dB
- Input: Mixer cable for Genesis Model 1 compatibility.
- Output: Stereo RCA connectors.
Memory
- System RAM: 856 KB [7]
- System Boot ROM: 1 Mbit (128 KB)
- External Memory Card: 1 Mbit (128 KB) CD BackUp RAM Cart
- System RAM bandwidth: 59.6 MB/sec (16-bit) [7]
Storage
- 500 MB CD-ROM discs (equivalent to 62 min of audio data)
- Access time: 800 ms
- 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 Kbytes/s (1x)
(Above specs prior to compression)
Boot ROM
- Size: 1 Mb (128 KB)
- Used for games, CD player, CD+G viewing, karaoke (limited to Japanese systems) and regional lockout
- Region codes: "NA" = North America (NTSC), "EU" = Europe (PAL)
Boot ROM Version | Machine | Download | CRC32 |
---|---|---|---|
0.98 | Pioneer LaserActive | 0.98 (NA) (info) ("Us lsr 930329.zip" does not exist) | 8c3e3945 |
0.98 (Asia) (info) ("Jp lsr 930329.zip" does not exist) | 9f5771d2 | ||
1.00 | Sega/Mega CD Model 1 Victor WonderMega 1 (Asia) Sega WonderMega (Asia) |
1.00g (Asia, NTSC) (info) ("BIOS Mega CD Japan 1.00g.7z" does not exist) | 3beb1ac2 |
1.00l (Asia, NTSC) (info) ("BIOS Mega CD Japan 1.00l.md.zip" does not exist) | f18dde5b | ||
1.00o (Asia, NTSC) (info) ("BIOS Mega CD Japan v1.00o.7z" does not exist) | 1d9756a3 | ||
1.00p (Asia, NTSC) (info) ("Jp mcd1 911217.zip" does not exist) | 9d2da8f2 | ||
1.00s (Asia, NTSC) (info) ("BIOS Mega CD Japan 1.00S.md.zip" does not exist) | 79f85384 | ||
1.00s (Asia, PAL) (info) ("Jp mcd1 911228.zip" does not exist) | 550f30bb | ||
1.00w (Sega WonderMega Bios) (info) ("Jp wmg 920206.zip" does not exist) | d21fe71d | ||
1.00 (NA) (info) ("BIOS Sega CD USA 1.00.md.zip" does not exist) | e7e3afe2 | ||
1.00 (EU) (info) ("Eu mcd1 921027.zip" does not exist) | 529ac15a | ||
1.04 | Pioneer LaserActive | 1.04 (NA) (info) ("Us mld 930922.zip" does not exist) | 2ed602d7 |
1.05 | Pioneer LaserActive | 1.05 (Asia) (info) ("Jp lsr 930810.zip" does not exist) | b24b919d |
1.10 | Sega CD Model 1 (minor update) | 1.10 (NA) (info) ("Us scd1 921011.zip" does not exist) | c6d10268 |
2.00 | Sega/Mega CD 2 Victor WonderMega 2 (Asia) JVC X'Eye (NA) |
2.00 (1st NA version) (info) ("Us scd2 930314.zip" does not exist) | 8af65f58 |
2.00w (2nd NA version) (info) ("Us scd2 930601.zip" does not exist) | 9f6f6276 | ||
2.00c (Asian version) (info) ("Jp mcd2 921222.zip" does not exist) | dd6cc972 | ||
2.00 (1st EU version) (info) ("Eu mcd2 930330.zip" does not exist) | 0507b590 | ||
2.00w (2nd EU version) (info) ("Eu mcd2 930601.zip" does not exist) | 4d5cb8da | ||
2.00 (X'Eye) (info) ("Us xeye 931227.zip" does not exist) | 290f8e33 | ||
2.00 (Wondermega) (info) ("Wondermega 2.00 Bios.zip" does not exist) | 2b19972f1 | ||
2.11 | Sega/Mega CD 2, Aiwa CSD G1M (Japan) | 2.11w (NA) (info) ("Us scd2 930621.zip" does not exist) | 2e49d72c |
2.11c (JP) (info) ("Aiwa_CSD_GM1_Bios.zip" does not exist) | 12154531 | ||
2.21 | Sega Multimega (Europe & Japan), CDX (North America), Linguaphone Education Gear (Japan) | 2.21x (MultiMega, EU) (info) ("Eu mmg 930916.zip" does not exist) | aacb851e |
2.21x (CDX) (info) ("Us cdx 930907.zip" does not exist) | d48c44b5 |
1 The ZIP file contains two dumps, a "good" dump and a "bad" dump. The "bad" dump has an incorrect HINT vector, but is otherwise identical to the "good" dump. The CRC32 listed here is for the "good" dump.
Other
Dimensions: 301mm x 212.5 x 112.5
Weight: 1.4 kg (3.1 lbs)
History
- Main article: History of the Sega Mega-CD.
Games
List of games
- Main article: List of Mega-CD games.
The five games marked with an asterisk(*) were later released in enhanced form, requiring both the Mega-CD and 32X to be played, and taking advantage of the latter's improved graphics (see Sega Mega-CD 32X).
- 3 Ninjas Kick Back / Hook (1994)
- 3x3 Eyes: Seima Densetsu (1993)
- AX-101 (1994)
- A-Rank Thunder Tanjouhen (1993)
- The Adventures of Batman & Robin (1995)
- The Adventures of Willy Beamish (1993)
- After Armageddon Gaiden (1994)
- After Burner III (1992)
- Aisle Lord (1992)
- Alshark (1993)
- Android Assault: The Revenge of Bari-Arm (1994)
- Anetto Futatabi (1993)
- The Animals (1994)
- Aoki Ookami to Shiroki Mejika: Genchou Hishi (1993)
- Arcus I.II.III (1993)
- Arslan Senki (1993)
- Bakuden: The Unbalanced Zone (1994)
- Batman Returns (1993)
- Battle Frenzy (1995)
- Battlecorps (1993)
- BC Racers (1995)
- Bill Walsh College Football (1993)
- Black Hole Assault (1992)
- Bouncers (1995)
- Bram Stoker's Dracula (1993)
- Brutal: Paws of Fury (1993)
- Burai: Hachigyoku no Yuushi Densetsu (1992)
- Cadillacs and Dinosaurs: The Second Cataclysm (1994)
- Capcom no Quiz Tonosama no Yabou (1992)
- Captain Tsubasa (1994)
- Chuck Rock II: Son of Chuck (1992)
- Chuck Rock (1992)
- Cliffhanger (1993)
- Cobra Command (1992)
- Colors of Modern Rock (1993)
- Compton's Interactive Encyclopedia (1994)
- Corpse Killer (1994)*
- Cosmic Fantasy Stories (1992)
- Crime Patrol (1994)
- Cyborg 009 (1993)
- Daihoushinden (1994)
- Dark Seed (1993)
- Dark Wizard (1993)
- Death Bringer: The Knight of Darkness (1992)
- Demolition Man (1995)
- Detonator Orgun (1992)
- Devastator (1993)
- Double Switch (1995)
- Dracula Unleashed (1993)
- Dragon's Lair (1994)
- Dune (1993)
- Dungeon Explorer (1994)
- Dungeon Master II: Skullkeep (1994)
- Dynamic Country Club (1993)
- Earnest Evans (1991)
- Earthworm Jim: Special Edition (1995)
- Ecco the Dolphin (1993)
- Ecco the Dolphin CD (1995)
- Ecco: The Tides of Time (1994)
- Egawa Suguro no Super League (1993)
- ESPN Baseball Tonight (1994)
- ESPN National Hockey Night (1994)
- ESPN NBA Hangtime '95 (1994)
- ESPN Sunday Night NFL (1994)
- Eternal Champions: Challenge from the Dark Side (1994)
- Eye of the Beholder (1994)
- F-1 Circus CD (1994)
- Fahrenheit (1995)*
- Fatal Fury Special (1995)
- Fhey Area (1992)
- FIFA International Soccer (1994)
- Final Fight CD (1993)
- Flashback: The Quest for Identity (1993)
- Flink (1994)
- Formula One World Championship: Beyond the Limit (1994)
- Frog Feast (2005)
- Funky Horror Band (1991)
- Gambler Jikko Chuushinha 2 (1992)
- Game no Kanzume: Sega Games Can Vol. 1 (1994)
- Game no Kanzume: Sega Games Can Vol. 2 (1994)
- Genei Toshi: Illusion City (1993)
- Ground Zero: Texas (1993)
- Heart of the Alien (1994)
- Heavy Nova (1991)
- Heimdall (1994)
- Hook (1992)
- INXS (1992)
- Iron Helix (1994)
- Ishii Hisaichi no Daisekai (1994)
- Jaguar XJ220 (1993)
- Jango World Cup (1993)
- Jeopardy! (1994)
- Joe Montana's NFL Football (1993)
- Jurassic Park (1993)
- Keio Flying Squadron (1993)
- Kids on Site (1994)
- Kris Kross (1992)
- The Lawnmower Man (1994)
- Lethal Enforcers II: Gun Fighters (1994)
- Lethal Enforcers (1993)
- Links: The Challenge of Golf (1995)
- Loadstar: The Legend of Tully Bodine (1994)
- Lords of Thunder (1995)
- Lunar: Eternal Blue (1994)
- Lunar: The Silver Star (1992)
- Mad Dog II: The Lost Gold (1994)
- Mad Dog McCree (1993)
- Mahou no Shoujo: Silky Lip (1992)
- Mansion of Hidden Souls (1993)
- Marko's Magic Football (1994)
- Marky Mark and the Funky Bunch (1992)
- Masked Rider (1994)
- Mega Schwarzschild (1993)
- MegaRace (1994)
- Mickey Mania: The Timeless Adventures of Mickey Mouse (1994)
- Microcosm (1994)
- Midnight Raiders (1994)
- Might and Magic III: Isles of Terra (1993)
- Mighty Mighty Missile! (2005)
- Mighty Morphin Power Rangers (1994)
- Mortal Kombat (1994)
- My Paint: The Animated Paint Program (1993)
- NBA Jam (1993)
- NFL Football Trivia Challenge (1994)
- NFL's Greatest: San Francisco vs. Dallas 1978-1993 (1993)
- NHL '94 (1993)
- Night Striker (1993)
- Night Trap (1992)*
- The Ninja Warriors (1993)
- Nostalgia 1907 (1993)
- Novastorm (1993)
- Panic! (1993)
- Pitfall: The Mayan Adventure (1994)
- Popful Mail (1994)
- Power Factory featuring C+C Music Factory (1992)
- Power Monger (1994)
- Prince of Persia (1993)
- Prize Fighter (1995)
- Pro Yakyuu Super League CD (1992)
- Psychic Dectective vol. 3: Psychic Detective Aya (1993)
- Psychic Dectective vol. 4: Psychic Detective Orgel (1993)
- Puggsy (1993)
- Quiz Scramble Special (1992)
- Racing Aces (1993)
- Radical Rex (1994)
- Ranma ½: Byakuran Aika (1993)
- RDF Global Conflict (1995)
- Record of Lodoss War JASPAC (1994)
- Revenge of the Ninja (1993)
- Revengers of Vengeance (1993)
- Rise of the Dragon (1992)
- Road Avenger (1992)
- Road Rash (1995)
- Robo Aleste (1993)
- Romance of the Three Kingdoms III: Dragon of Destiny (1993)
- Samurai Shodown (1995)
- The Secret of Monkey Island (1993)
- Sega Classics Arcade Collection (1993)
- Sengoku Denshou (1993)
- Sensible Soccer (1993)
- Sewer Shark (1992)
- Shadow of the Beast II (1994)
- Shadowrun (1996)
- Sherlock Holmes: Consulting Detective Vol. II (1992)
- Sherlock Holmes: Consulting Detective (1992)
- Shin Megami Tensei (1994)
- Shining Force CD (1994)
- Silpheed (1993)
- SimEarth (1993)
- Slam City with Scottie Pippen (1992)*
- The Smurfs (1995)
- Snatcher (1994)
- Sol-Feace (1991)
- Sonic the Hedgehog CD (1993)
- Soulstar (1994)
- Space Ace (1993)
- The Space Adventure (1995)
- Spider-Man vs. The Kingpin (1993)
- Star Strike (2000)
- Star Wars Chess (1993)
- Star Wars: Rebel Assault (1994)
- StarBlade (1994)
- Stellar Fire (1993)
- Supreme Warrior (1994)*
- Surgical Strike (1995)*
- Syndicate (1993)
- Tenbu: Mega CD Special (1992)
- Tenka Fubu (1991)
- The Terminator (1994)
- Theme Park (1995)
- The Third World War (1993)
- Thunderhawk (1993)
- Time Gal (1992)
- Tokyo Mahjong Gakuen (1996)
- Tomcat Alley (1994)
- Trivial Pursuit (1994)
- Ultraverse Prime / Microcosm (1994}
- Urusei Yatsura: Dear My Friends (1994)
- Vay (1993)
- Warau Salesman (1993)
- Wheel of Fortune (1994)
- Who Shot Johnny Rock? (1993)
- Wild Woody (1995)
- Wing Commander (1994)
- Winning Post (1993)
- Wirehead (1995)
- Wolfchild (1993)
- Wonder Dog (1992)
- World Cup USA 94 (1994)
- WWF Rage in the Cage (1993)
- Yumimi Mix (1993)
Launch titles
Japan
North America
United Kingdom
Germany
Spain
Italy
- Sol-Feace/Cobra Command (pack-in)
Magazine articles
- Main article: Sega Mega-CD/Magazine articles.
Promotional material
Print advertisements
- MegaCD US PrintAdvert.jpg
US (1)
- MegaCD US PrintAdvert 2.jpg
US (2)
- MCDII9GamePack MCD UK PrintAd.jpg
UK (Mega-CD II 9 Game Pack)
- 1993 07 - Teaser Mega CD.jpg
ES (teaser; 2)
- 1993 08 - Teaser Mega CD.jpg
ES (teaser; 3)
- MegaCD ES PrintAdvert2.jpg
ES (launch; 2)
- MegaCD ES PrintAdvert3.jpg
ES (1)
- 1993 12 - Mega CD.jpg
ES (2)
- 1994 01 - Mega CD.jpg
ES (3)
- 1994 04 - Mega CD.jpg
ES (4)
- 1994 07 - Mega CD.jpg
ES (5)
- 1994 11 - Mega CD.jpg
ES (5)
- 1995 06 - Mega CD.jpg
ES (6)
- 1995 09 - Mega CD.jpg
ES (7)
- 1995 12 - Mega CD.jpg
ES (8)
- Samsung megacd2.jpg
KR (Mega-CD 2)
Television advertisements
JP
US
US (Chill E.B.)
UK (Sega TV)
UK or AU?
UK (Horiscope)
Artwork
External links
References
- ↑ 1.0 1.1 File:SegaVisions US 09.pdf, page 6
- ↑ File:MegaPlay US 11.pdf, page 16
- ↑ 3.0 3.1 File:CVG UK 138.pdf, page 8
- ↑ Encyclopedia of Video Games
- ↑ 5.0 5.1 http://www.angelfire.com/ny/dezmoowu/Sega/progscd.txt
- ↑ https://youtu.be/Vyme7CT04cw
- ↑ 7.0 7.1 http://console5.com/techwiki/images/1/16/Mega-CD_Maintenance_Manual%2C_Export%2C_August%2C_1992%2C_Rev_A.pdf
- ↑ File:TC511664B datasheet.pdf
- ↑ File:TC51832 datasheet.pdf
- ↑ http://data.datasheetlib.com/pdf1/73/30/733038/mb8464a-10l_e1cb591058.pdf
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Pico | Beena |
- Pages with broken file links
- JP Mega-CD hardware
- US Mega-CD hardware
- DE Mega-CD hardware
- ES Mega-CD hardware
- FR Mega-CD hardware
- UK Mega-CD hardware
- SE Mega-CD hardware
- IT Mega-CD hardware
- AU Mega-CD hardware
- BR Mega-CD hardware
- KR Mega-CD hardware
- TW Mega-CD hardware
- Mega-CD hardware
- External TXT reference
- External PDF reference
- GalleryPrintAd file defined
- Sega Mega-CD