System246 JAMMA PCB This I/O board is only used on the 246A chassis, as it is installed internally, and connects directly to a socket on the Namco Daughterboard. Its capabilities are identical to its updated external version.
System246(B) JAMMA PCB The default I/O board supplied with most 246B and later chassis, and also available as an add-on kit, contains an onboard stereo amp, video sync inverters to convert the malformed PlayStation 2 sync signal, a JAMMA pinout, and a 10-pin kick harness to support up to 6 buttons per player.
Namco FCA PCB is Factory installed inside the System 246(Driving) chassis, but also makes an appearance on Cobra as an interface to the card reader.
Namco V185 I/O PCB is a JVS I/O board common on most 2X6 series gun games such as Vampire Night, Cobra, and Time Crisis 3 and Time Crisis 4.
Namco V257 STR PCB is a PCB that can be connected to the 246(Driving) chassis via its proprietary front cable port to provide normal driving game and force-feedback functionality. Game that supper this PCB may verify that the force feedback motor is powered by performing a power-on test that checks the wheel potentiometer value while turing the wheel via force feedback. If this check fails, the game may not boot
Namco V290 FCB PCB is a JVS I/O board required for Touchscreen games on the 2X6 platform such as Dragon Chronicle Online, Druaga Whole Brain, and others. It supports serial touchscreen interface, card readers, and limited button I/O.
Namco V329 NA-JV PCB is a JVS I/O board that is also used on some 2X6 series gun games, and appears mostly interchangeable with the V185 I/O PCB depending on cabinet fittings.
Taito Driving I/O is an unknown model (Please update) PCB required for Taito's Battle Gear 3 and Battle Gear 3: Tuned games, providing driving interface and custom card reader functionality for the "key" cards as required by the games.
Namco Cyber Lead Arcade Cabinet feature an LED display that, when connected to a 2X6 game that supports them, will display game-specific graphics and information. If a game does not support it, it will show the default display modes.
Other Many other JVS I/O pcb from various manufacturers have been tested to work flawlessly for general lever and button games, for example Sega 837-13551-92, 837-13844-02 and 838-13683-02, and the Capcom JVS I/O, with analog inputs and pass-through JVS mode supported on a per-game basis.