CPS-2

The or 'Capcom Play System 2' is an arcade system board that debuted in 1993 with ''Super Street Fighter 2'', and ''.

Contents

History

Specifications

Region colors

List of games

See also

External links

History

The earlier Capcom system board, CPS-1, while successful, was very vulnerable to bootleggers making unauthorized copies of the games. In order to rectify the situation, Capcom took the CPS-1 hardware (with QSound) with minimal changes and employed encryption on the program ROMs to prevent illegal copying.
The CPS-2 consists of 2 separate parts; the ''A'' board, which connects to the JAMMA harness and contains components common between all CPS-2 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. CPS-2 ''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. 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 in-circuit, but this must be done before the original falls below 2V or the keys will be lost.
Due to the heavy encryption, it was believed for a long time that CPS-2 emulation was next to impossible. However, in January 2001, the CPS-2 Shock group was able to obtain unencrypted program data by hacking the hardware and provided XOR difference tables to produce this data from ROM images, making emulation possible, as well as restoring cartridges that had been erased because of the suicide system. The legality of these difference tables is disputed.
In January 2007, the encryption method was fully reverse-engineered by Andreas Naive and Nicola Salmoria. It has been determined, with 99.9% confidence, that the encryption employs two four-round Feistel networks with a 64-bit key.[1][2] 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.

Specifications

★ Main CPU: Motorola 68000 at 16 MHz

★ Sound CPU: ZiLOG Z80 at 8 MHz

★ Sound chip: QSound at 4 MHz

★ Maximum number of colors: 4096 (12 bit RGB)

★
★ Colors per tile: 16 (4 bits per pixel)

★ Maximum number of objects: 900 (16×16 pixels)

★ Scroll faces: 3

★ Scroll features: Horizontal & vertical scrolling, linescroll

★ Resolution, pixels: 384×224

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

Release date	Developer	English title	Japanese title	Genre
2000-06-20	Eighting/Raizing	''	''1944 The Loop Master'' (1944 THE LOOP MASTER)	Shoot 'em up
1995-12-07	Capcom	''	''19XX The War Against Destiny'' (19XX -THE WAR AGAINST DESTINY-)	Shoot 'em up
1994-05-20	Capcom	''Alien vs. Predator''	''Alien VS Predator'' (エイリアンVSプレデター)	Beat 'em up
1994-09-16	Capcom	''Armored Warriors''	''Powered Gear: Strategic Variant Armor Equipment'' (パワードギア -STRATEGIC VARIANT ARMOR EQUIPMENT-)	Beat 'em up
1997-03-19	Capcom	''Battle Circuit''	''Battle Circuit'' (バトルサーキット)	Beat 'em up
1997-07-22	Capcom	''Capcom Sports Club''	''Capcom Sports Club'' (カプコンスポーツクラブ)	Sports game
1995-04-20	Capcom	''	Cyberbots: Full Metal Madness'' (サイバーボッツ -FULL METAL MADNESS-)	Versus Fighting
1994-07-05	Capcom	''Darkstalkers: The Night Warriors''	''Vampire: The Night Warriors'' (ヴァンパイア -The Night Warriors-)	Versus Fighting
2000-01-21	Eighting/Raizing	''Dimahoo''	''Great Mahō Daisakusen'' (グレート魔法大作戦)	Shoot 'em up
1996-02-06	Capcom	''	''Dungeons & Dragons: Shadow over Mystara'' (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
1994-01-13	Capcom	''	''Dungeons & Dragons: Tower of Doom'' (ダンジョンズ&ドラゴンズ タワーオブドゥーム)	Beat 'em up
1993-12-03	Capcom	''Eco Fighters''	''Ultimate Ecology'' (アルティミットエコロジー)	Shoot 'em up
1999-02-22	Takumi	''Giga Wing''	''Giga Wing'' (ギガウイング)	Shoot 'em up
2003-12-22	Capcom	''	''Hyper Street Fighter II'' (ハイパーストリートファイターII)	Versus Fighting
1999-05-27	Capcom	''	''Jangokushi Haō no Saihai'' (雀國志 覇王の采牌)	Puzzle game
2001-08-20	Mitchell	''Janpai Puzzle Chōkō''	''Janpai Puzzle Chōkō'' (雀牌パズル 長江)	Puzzle game
2000-04-12	Takumi	''	''Mars Matrix'' (マーズマトリックス)	Shoot 'em up
1995-10-24	Capcom	''Marvel Super Heroes''	''Marvel Super Heroes'' (MARVEL SUPER HEROES)	Versus Fighting
1997-06-20	Capcom	''Marvel Super Heroes vs. Street Fighter''	''Marvel Super Heroes vs. Street Fighter'' (MARVEL SUPER HEROES VS. STREET FIGHTER)	Versus Fighting
1998-01-12	Capcom	''	''Marvel vs. Capcom: Clash of Super Heroes'' (MARVEL VS. CAPCOM CLASH OF SUPER HEROES)	Versus Fighting
1995-09-22	Capcom	''	''Rockman: The Power Battle'' (ロックマン ザ・パワーバトル)	Versus Fighting
1996-07-08	Capcom	''	''Rockman 2: The Power Fighters'' (ロックマン2 ザ・パワーファイターズ)	Versus Fighting
2000-10-10	Mitchell	''Mighty! Pang''	''Mighty Pang'' (マイティ・パン)	Platformer
1995-03-02	Capcom	''Night Warriors: Darkstalkers' Revenge''	''Vampire Hunter: Darkstalkers' Revenge'' (ヴァンパイアハンター -Darkstalkers' Revenge-)	Versus Fighting
2001-01-17	Cave	''Progear''	''Progear no Arashi'' (プロギアの嵐)	Shoot 'em up
2001-02-05	Mitchell	''Puzz Loop 2''	''Puzz Loop 2'' (パズループ2)	Puzzle game
1996-08-26	Capcom	''Quiz Nanairo Dreams: Nijiirochō no Kiseki''	''Quiz Nanairo Dreams: Nijiirochō no Kiseki'' (クイズなないろDREAMS 虹色町の奇跡)	Quiz game
1994-08-08	Capcom	''Ring of Destruction: Slammasters II''	''Super Muscle Bomber: The International Blowout'' (スーパーマッスルボマー -THE INTERNATIONAL BLOWOUT-)	Versus Fighting
1995-06-05	Capcom	''Street Fighter Alpha''	''Street Fighter Zero'' (ストリートファイターZERO)	Versus Fighting
1996-02-27	Capcom	''Street Fighter Alpha 2''	''Street Fighter Zero 2'' (ストリートファイターZERO2) ''Street Fighter Zero 2 Alpha'' (ストリートファイターZERO2 ALPHA)	Versus Fighting
1998-06-29	Capcom	''Street Fighter Alpha 3''	''Street Fighter Zero 3'' (ストリートファイターZERO3)	Versus Fighting
1997-09-04	Capcom	''Super Gem Fighter Mini Mix''	''Pocket Fighter'' (ポケットファイター)	Versus Fighting
1996-05-29	Capcom	''Super Puzzle Fighter II Turbo''	''Super Puzzle Fighter II X'' (スーパーパズルファイターIIX)	Puzzle game
1993-09-10	Capcom	''Super Street Fighter II: The New Challengers'' ''Super Street Fighter II: Tournament Battle''	''Super Street Fighter II'' (スーパーストリートファイターII)	Versus Fighting
1994-02-23	Capcom	''Super Street Fighter II Turbo''	''Super Street Fighter II X: Grand Master Challenge'' (スーパーストリートファイターIIX)	Versus Fighting
1997-09-13	Capcom	''Vampire Hunter 2: Darkstalkers' Revenge''	''Vampire Hunter 2: Darkstalkers' Revenge'' (ヴァンパイアハンター2 -Darkstalkers' Revenge-)	Versus Fighting
1997-05-19	Capcom	''Vampire Savior: The Lord of Vampire''	''Vampire Savior: The Lord of Vampire'' (ヴァンパイアセイヴァー -The Lord of Vampire-)	Versus Fighting
1997-09-13	Capcom	''Vampire Savior 2: The Lord of Vampire''	''Vampire Savior 2: The Lord of Vampire'' (ヴァンパイアセイヴァー2 -The Lord of Vampire-)	Versus Fighting
1994-12-08	Capcom	''	''X-Men: Children of the Atom'' (X-MEN Children of The Atom)	Versus Fighting
1996-09-09	Capcom	''X-Men vs. Street Fighter''	''X-Men vs. Street Fighter'' (X-MEN VS. STREET FIGHTER)	Versus Fighting

See also

★ CPS-1

★ CPS-3

External links

★ Technical information in the MAME CPS-2 driver

★ CPS-2 SUICIDE BATTERY REPLACEMENT SERVICE

★ CPS-2 Suicide Battery Repair Kit by JAMMABOARDS.COM

★ CPS-2 Shock - Technical Information

★ CPS-2 at System 16 - The Arcade Museum

★ CPS-2 Keystone Suicide Battery Retainer Mod - JAMMAPARTS.COM