However, in January 2001, the CPS-2 Shock group 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. 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.Ĭonsequently 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).ĭue to the heavy encryption, it was believed for a long time that CP System II emulation was next to impossible. This is known to hobbyists as the "suicide battery".
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As time passes, these batteries lose their charge and the games stop functioning, because the CPU cannot execute any code without the decryption keys. The B boards hold battery-backed memory containing decryption keys needed for the games to run. The system is comprised of a motherboard (the 'A Board') and a game ROM board (the 'B Board'). It was successor to their previous CP System arcade hardware and was succeeded by the CP System III hardware in 1996. The exception to this is that the blue and green boards can be used together. CPS-2 is an arcade system board that Capcom first used in 1993 for Super Street Fighter II. 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 relationship between the A and B board is basically the same as that between a home video game console and cartridge. The 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.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.
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