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{{Infobox information appliance | name = CP System II | image = [[File:Cps2.png|250px]] | caption = Super Street Fighter II ''B'' board mounted on an ''A'' board | manufacturer = [[Capcom]] | releasedate = {{Start date|1993|09}} | input = 8-way [[joystick]], from 3 to 6 [[Button (control)|buttons]] | cpu = [[68000|Motorola 68000]] (@ 16 MHz) | display = [[Raster graphics|Raster]], 384 x 224 pixels (Horizontal), 4096 colors | audio = Sound CPU: [[Zilog Z80|Z80]] (@ 8 MHz) <br/> Q-Sound (@ 4 MHz) }} The {{nihongo|'''CP System II'''|CPシステムII|shīpī shisutemu tsū}} or '''CPS-2''' is an [[arcade system board]] that Capcom first used in 1993 for ''[[Super Street Fighter II]]''. It was successor to their previous [[CP System]] arcade hardware and was succeeded by the [[CP System III]] hardware in {{vgy|1996}}. ==History== The earlier Capcom [[Arcade system board|system board]], the original CP System (or CPS-1), while successful, was very vulnerable to bootleggers making unauthorized copies of the games. In order to rectify the situation, Capcom took the CP System hardware (with [[QSound]]) with minimal changes and employed encryption on the program ROMs to prevent software piracy. The CP System II consists of two separate parts; the ''A'' board, which connects to the [[JAMMA]] harness and contains components common between all CP System II games, and the ''B'' board, which contains the game itself. The relationship between the ''A'' and ''B'' board is basically the same as that between a home video game console and cartridge. CP System II ''A'' and ''B'' boards are color-coded by region, and each board can only be used with its same-colored mate. The exception to this is that the blue and green boards can be used together. The ''B'' boards hold battery-backed memory containing decryption keys needed for the games to run. As time passes, these batteries lose their charge and the games stop functioning, because the CPU cannot execute any code without the decryption keys. This is known to hobbyists as the "suicide battery". It is possible to bypass the original battery and swap it out with a new one<ref>[http://cps2shock.retrogames.com/suicide.html CPS-2 Shock<!-- Bot generated title -->]</ref> in-circuit, but this must be done before the original falls below 2V or the keys will be lost. Consequently the board would just die anyway, meaning even if used legally it would not play after a finite amount of time (Unless a fee was paid to Capcom to replace it). Due to the heavy encryption, it was believed for a long time that CP System II [[Video game console emulator|emulation]] was next to impossible. However, in January 2001, the CPS-2 Shock group<ref>[http://cps2shock.retrogames.com/wip.html CPS-2 Shock<!-- Bot generated title -->]</ref> was able to obtain unencrypted program data by hacking into the hardware, which they distributed as [[XOR]] difference tables to produce the unencrypted data from the original ROM images, making emulation possible, as well as restoring cartridges that had been erased because of the suicide system. In January 2007, the encryption method was fully reverse-engineered by Andreas Naive<ref>[http://andreasnaive.blogspot.com/ Notas de Andy<!-- Bot generated title -->]</ref> and [[Nicola Salmoria]]. It has been determined that the encryption employs two four-round [[Feistel cipher]]s with a 64-bit key.<ref>[http://www.mameworld.net/maws/mamesrc/src/mame/machine/cps2crpt.c MAWS - MAME source<!-- Bot generated title -->]</ref><ref>[http://mamelife.blogspot.com/2007/01/cps2-getting-closer.html Nicola's MAME Ramblings: CPS2 Getting Closer<!-- Bot generated title -->]</ref> The algorithm was thereafter implemented in this state for all known CPS-2 games in [[MAME]]. Also thanks to the encryption, the system was never bootlegged until unencrypted program data became available. ===Region colors=== * Blue: U.S.A., Canada, and Europe * Green: Japan * Orange: South America * Gray: Asia * Yellow: "Region 0" (available by rental only) * Black: "Region 0" incorporated ''A'' and ''B'' board in the same unit ==List of games== <!-- To edit the text of this article, skip past the table. --><!-- Dates given are the earliest possible dates shown in the game's bootup screen, any region. --><!-- There are rumors of a CPS-2 version of Pnickies ぷにっきいず and a prototype called Galum Pa! ぐるんぱ but they are not listed due to the lack of concrete information --> {| class="wikitable sortable" style="width:auto" ! Release date ! Developer ! English title ! Japanese title ! Genre |- | 1993-09-10 | [[Capcom]] | ''[[Super Street Fighter II|Super Street Fighter II: The New Challengers]]''<br>''[[Super Street Fighter II|Super Street Fighter II: Tournament Battle]]'' | ''Super Street Fighter II''<br>(スーパーストリートファイターII) | [[fighting game|Head-to-Head Fighting Game]] |- | 1993-12-03 | [[Capcom]] | ''[[Eco Fighters]]'' | ''Ultimate Ecology''<br>(アルティミットエコロジー) | [[Shoot 'em up]] |- | 1994-01-13 | [[Capcom]] | ''[[Dungeons & Dragons: Tower of Doom]]'' | ''Dungeons & Dragons: Tower of Doom''<br>(ダンジョンズ&ドラゴンズ タワーオブドゥーム) | [[Beat 'em up]] |- | 1994-02-23 | [[Capcom]] | ''[[Super Street Fighter II#Super Street Fighter II Turbo|Super Street Fighter II Turbo]]'' | ''Super Street Fighter II X: Grand Master Challenge''<br>(スーパーストリートファイターIIX) | [[fighting game|Head-to-Head Fighting Game]] |- | 1994-05-20 | [[Capcom]] | ''[[Alien vs. Predator (arcade game)|Alien vs Predator]]'' | ''Alien VS Predator''<br>(エイリアンVSプレデター) | [[Beat 'em up]] |- | 1994-07-05 | [[Capcom]] | ''[[Darkstalkers|Darkstalkers: The Night Warriors]]'' | ''Vampire: The Night Warriors''<br>(ヴァンパイア -The Night Warriors-) | [[fighting game|Head-to-Head Fighting Game]] |- | 1994-08-08 | [[Capcom]] | ''[[Saturday Night Slam Masters|Ring of Destruction: Slammasters II]]'' | ''Super Muscle Bomber: The International Blowout''<br>(スーパーマッスルボマー -THE INTERNATIONAL BLOWOUT-) | [[fighting game|Head-to-Head Fighting Game]] |- | 1994-09-16 | [[Capcom]] | ''[[Armored Warriors]]'' | ''Powered Gear: Strategic Variant Armor Equipment''<br>(パワードギア -STRATEGIC VARIANT ARMOR EQUIPMENT-) | [[Beat 'em up]] |- | 1994-12-08 | [[Capcom]] | ''[[X-Men: Children of the Atom (arcade game)|X-Men: Children of the Atom]]'' | ''X-Men: Children of the Atom''<br>(X-MEN Children of The Atom) | [[fighting game|Head-to-Head Fighting Game]] |- | 1995-03-02 | [[Capcom]] | ''[[Darkstalkers|Night Warriors: Darkstalkers' Revenge]]'' | ''Vampire Hunter: Darkstalkers' Revenge''<br>(ヴァンパイアハンター -Darkstalkers' Revenge-) | [[fighting game|Head-to-Head Fighting Game]] |- | 1995-04-20 | [[Capcom]] | ''[[Cyberbots: Full Metal Madness]]'' | Cyberbots: Full Metal Madness''<br>(サイバーボッツ -FULL METAL MADNESS-) | [[fighting game|Head-to-Head Fighting Game]] |- | 1995-06-05 | [[Capcom]] | ''[[Street Fighter Alpha]]'' | ''Street Fighter Zero''<br>(ストリートファイターZERO) | [[fighting game|Head-to-Head Fighting Game]] |- | 1995-09-22 | [[Capcom]] | ''[[Mega Man: The Power Battle]]'' | ''Rockman: The Power Battle''<br>(ロックマン ザ・パワーバトル) | [[Platformer]] |- | 1995-10-24 | [[Capcom]] | ''[[Marvel Super Heroes (arcade game)|Marvel Super Heroes]]'' | ''Marvel Super Heroes''<br>(MARVEL SUPER HEROES) | [[fighting game|Head-to-Head Fighting Game]] |- | 1995-12-07 | [[Capcom]] | ''[[19XX: The War Against Destiny]]'' | ''19XX The War Against Destiny''<br>(19XX -THE WAR AGAINST DESTINY-) | [[Shoot 'em up]] |- | 1996-02-06 | [[Capcom]] | ''[[Dungeons & Dragons: Shadow over Mystara]]'' | ''Dungeons & Dragons: Shadow over Mystara''<br>(ダンジョンズ&ドラゴンズ シャドーオーバーミスタラ) | [[Beat 'em up]] |- | 1996-02-27 | [[Capcom]] | ''[[Street Fighter Alpha 2]]'' | ''Street Fighter Zero 2''<br>(ストリートファイターZERO2) | [[fighting game|Head-to-Head Fighting Game]] |- | 1996-05-29 | [[Capcom]] | ''[[Puzzle Fighter|Super Puzzle Fighter II Turbo]]'' | ''Super Puzzle Fighter II X''<br>(スーパーパズルファイターIIX) | [[Puzzle game]] |- | 1996-07-08 | [[Capcom]] | ''[[Mega Man 2: The Power Fighters]]'' | ''Rockman 2: The Power Fighters''<br>(ロックマン2 ザ・パワーファイターズ) | [[Platformer]] |- | 1996-08-05 | [[Capcom]] | ''[[Street Fighter Alpha 2#Arcade|Street Fighter Zero 2 Alpha]]'' | ''Street Fighter Zero 2 Alpha''<br>(ストリートファイターZERO2 ALPHA) | [[fighting game|Head-to-Head Fighting Game]] |- | 1996-08-26 | [[Capcom]] | ''[[Quiz Nanairo Dreams|Quiz Nanairo Dreams: Nijiirochō no Kiseki]]'' | ''Quiz Nanairo Dreams: Nijiirochō no Kiseki''<br>(クイズなないろDREAMS 虹色町の奇跡) | [[Quiz game]] |- | 1996-09-09 | [[Capcom]] | ''[[X-Men vs. Street Fighter]]'' | ''X-Men vs. Street Fighter''<br>(X-MEN VS. STREET FIGHTER) | [[fighting game|Head-to-Head Fighting Game]] |- | 1997-03-19 | [[Capcom]] | ''[[Battle Circuit]]'' | ''Battle Circuit''<br>(バトルサーキット) | [[Beat 'em up]] |- | 1997-05-19 | [[Capcom]] | ''[[Darkstalkers|Vampire Savior: The Lord of Vampire]]'' | ''Vampire Savior: The Lord of Vampire''<br>(ヴァンパイアセイヴァー -The Lord of Vampire-) | [[fighting game|Head-to-Head Fighting Game]] |- | 1997-06-20 | [[Capcom]] | ''[[Marvel Super Heroes vs. Street Fighter]]'' | ''Marvel Super Heroes vs. Street Fighter''<br>(MARVEL SUPER HEROES VS. STREET FIGHTER) | [[fighting game|Head-to-Head Fighting Game]] |- | 1997-07-22 | [[Capcom]] | ''[[Capcom Sports Club]]'' | ''Capcom Sports Club''<br>(カプコンスポーツクラブ) | [[Sports game]] |- | 1997-09-04 | [[Capcom]] | ''[[Pocket Fighter|Super Gem Fighter Mini Mix]]'' | ''Pocket Fighter''<br>(ポケットファイター) | [[fighting game|Head-to-Head Fighting Game]] |- | 1997-09-13 | [[Capcom]] | ''[[Darkstalkers|Vampire Hunter 2: Darkstalkers' Revenge]]'' | ''Vampire Hunter 2: Darkstalkers' Revenge''<br>(ヴァンパイアハンター2 -Darkstalkers' Revenge-) | [[fighting game|Head-to-Head Fighting Game]] |- | 1997-09-13 | [[Capcom]] | ''[[Darkstalkers|Vampire Savior 2: The Lord of Vampire]]'' | ''Vampire Savior 2: The Lord of Vampire''<br>(ヴァンパイアセイヴァー2 -The Lord of Vampire-) | [[fighting game|Head-to-Head Fighting Game]] |- | 1998-01-12 | [[Capcom]] | ''[[Marvel vs. Capcom: Clash of Super Heroes]]'' | ''Marvel vs. Capcom: Clash of Super Heroes''<br>(MARVEL VS. CAPCOM CLASH OF SUPER HEROES) | [[fighting game|Head-to-Head Fighting Game]] |- | 1998-06-29 | [[Capcom]] | ''[[Street Fighter Alpha 3]]'' | ''Street Fighter Zero 3''<br>(ストリートファイターZERO3) | [[fighting game|Head-to-Head Fighting Game]] |- | 1999-02-22 | [[Takumi Corporation|Takumi]] | ''[[Giga Wing]]'' | ''Giga Wing''<br>(ギガウイング) | [[Shoot 'em up]] |- | 1999-05-27 | [[Capcom]] | ''[[Jangokushi: Haō no Saihai]]'' | ''Jangokushi Haō no Saihai''<br>(雀國志 覇王の采牌) | [[Puzzle game]] |- | 2000-01-21 | [[Eighting/Raizing]] | ''[[Dimahoo]]'' | ''Great Mahō Daisakusen''<br>(グレート魔法大作戦) | [[Shoot 'em up]] |- | 2000-04-12 | [[Takumi Corporation|Takumi]] | ''[[Mars Matrix: Hyper Solid Shooting]]'' | ''Mars Matrix''<br>(マーズマトリックス) | [[Shoot 'em up]] |- | 2000-06-20 | [[Eighting/Raizing]] | ''[[1944: The Loop Master]]'' | ''1944 The Loop Master''<br>(1944 THE LOOP MASTER) | [[Shoot 'em up]] |- | 2000-10-10 | [[Mitchell Corporation|Mitchell]] | ''[[Mighty! Pang]]'' | ''Mighty Pang''<br>(マイティ・パン) | [[Platform game|Platformer]] |- | 2001-01-17 | [[Cave (company)|Cave]] | ''[[Progear]]'' | ''Progear no Arashi''<br>(プロギアの嵐) | [[Shoot 'em up]] |- | 2001-02-05 | [[Mitchell Corporation|Mitchell]] | ''[[Puzz Loop 2]]'' | ''Puzz Loop 2''<br>(パズループ2) | [[Puzzle game]] |- | 2001-08-20 | [[Mitchell Corporation|Mitchell]] | ''[[Janpai Puzzle Chōkō]]'' | ''Janpai Puzzle Chōkō''<br>(雀牌パズル 長江) | [[Puzzle game]] |- | 2003-12-22 | [[Capcom]] | ''[[Hyper Street Fighter II: The Anniversary Edition]]'' | ''Hyper Street Fighter II''<br>(ハイパーストリートファイターII) | [[fighting game|Head-to-Head Fighting Game]] |} <!-- END OF TABLE --> ==See also== * [[CP System]] * [[CP System III]] ==References== {{reflist|2}} ==External links== * [http://maws.mameworld.info/maws/mamesrc/src/mame/drivers/cps2.c Technical information in the MAME CPS-2 driver] * [http://cps2shock.retrogames.com/techinfo.html CPS-2 Shock - Technical Information] * [http://www.system16.com/hardware.php?id=795 CPS-2 at System 16 - The Arcade Museum] * [http://www.jammaparts.com/keystonemod.htm CPS-2 Keystone Suicide Battery Retainer Mod - JAMMAPARTS.COM] * [http://www.uvlist.net/groups/compare/cps1-hw,cps2-hw,cps3-hw ''CPS-1, CPS-2 and CPS-3 releases comparison''] [[Category:Capcom]] [[Category:Arcade system boards]]
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