Sega ST-V
ST-V (Sega Titan Video game system) was an arcade system board released by Sega in 1995. Departing from their usual process of building custom arcade hardware, Sega's ST-V is essentially identical to the Sega Saturn home console system. The only difference is the media: ST-V used ROM cartridges instead of CD-ROMs to store games. Being derived from the Saturn hardware, the ST-V was presumably named after the moon Titan, a satellite of Saturn.
The majority of ST-V titles were released in Japan only, but a notable exception was the port of Dynamite Deka, which became Die Hard Arcade. Games released for the ST-V includes the arcade version of Virtua Fighter Remix, Golden Axe: The Duel and Final Fight Revenge. The shared hardware between Saturn and ST-V allowed for very "pure" ports for the Saturn console.
Read more about this topic: List Of Sega Arcade System Boards