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CP System III

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The CP System III (CPシステムIII shīpī shisutemu surī?) or CPS-3 is an arcade system board that was first used by Capcom in 1997 with the arcade game Red Earth. It was the second successor to the CP System arcade hardware, following the CP System II.


The CP System III is the latest arcade system board designed by Capcom. It features a security mechanism; games are supplied on a CD, which contains the encrypted game contents, and a security cartridge containing the game BIOS and the SH-2 CPU[1] with integrated decryption logic, with the per-game key stored in battery-backed SRAM. When the CP System III board is first powered on, the contents of the CD are flashed onto a bank of SIMMs on the motherboard, where it is executed. The program code is then decrypted at run time via the security cartridge. The security cartridge is sensitive to any sort of tampering, which will result in the decryption key being erased and the cartridge being rendered useless.

Games became unplayable when the battery inside the security cartridge died, which had to be replaced at cost to the owner. Furthermore, the CP System III was only capable of 2D graphics at a time when most games were being developed with 3D hardware in mind.

In June 2007, the encryption method was reverse-engineered by Andreas Naive, making emulation possible. The encryption turned out to be a fairly straightforward combination of rotates and XORs.[1]


  • Main CPU: Hitachi HD6417099 (SH-2) at 25 MHz
  • Storage:
  • Sound chip: 16-channel 8-bit sample player, stereo
  • Maximum number of colors: 32768 (15 bit colour, 555 RGB)
    • Palette size: 131072 pens
    • Colors per tile (backgrounds / sprites): 64 (6 bits per pixel) or 256 (8 bits per pixel), selectable
    • Colors per tile (text overlay): 16 (4 bits per pixel)
  • Maximum number of objects: 1024, with hardware scaling
  • Scroll faces: 4 regular + 1 text overlay 'score screen' layer
  • Scroll features: Horizontal & vertical scrolling, linescroll, linezoom
  • Framebuffer zooming
  • Color blending effects
  • Hardware RLE decompression of 6 bpp and 8 bpp graphics through DMA
  • Resolution, pixels: 384×224 (standard mode) / 496×224 (widescreen mode)
  • Known games on this hardware: 6

List of games

Release date Developer English title Japanese title Genre
1996-11-21 Capcom Red Earth Warzard
Head-to-Head Fighting Game
1997-02-04 Capcom Street Fighter III: New Generation Street Fighter III
Head-to-Head Fighting Game
1997-09-30 Capcom Street Fighter III 2nd Impact: Giant Attack Street Fighter III 2nd Impact
(ストリートファイターIII 2nd Impact)
Head-to-Head Fighting Game
1998-12-02 Capcom JoJo's Venture JoJo no Kimyōna Bōken
Head-to-Head Fighting Game
1999-05-12 Capcom Street Fighter III 3rd Strike: Fight for the Future Street Fighter III 3rd Strike
(ストリートファイターIII 3rd Strike)
Head-to-Head Fighting Game
1999-09-13 Capcom JoJo's Bizarre Adventure JoJo no Kimyōna Bōken Miraie no Isan
(ジョジョの奇妙な冒険 未来への遺産)
Head-to-Head Fighting Game

See also


External links

ja:CPシステムIII pt:CPS-3

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