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CP System III
The or CPS-3 is an arcade system board that was first used by Capcom in 1996 with the arcade game ''Red Earth''. It was the second successor to the CP System arcade hardware, following the CP System II. It would be the last proprietary system board Capcom would produce before moving to the more common Taito Type X system boards used in Japan.
==History==
The CP System III became the final arcade system board to be ever 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〔(MAME's CPS-3 driver )〕 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 loaded into 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 become unplayable when the battery inside the security cartridge dies.
In June 2007, the encryption method was reverse-engineered by Andreas Naive,〔()〕 making emulation possible.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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