The Taito Type X2 was deceptively simple. If you opened the chassis, you wouldn't find proprietary chips soldered to a board. You would find a motherboard, an Intel Pentium 4 processor, an Nvidia graphics card, and a standard hard drive.
Since the original hardware used specific I/O boards (JVS), you need a "wrapper" or "loader" to translate your PC's keyboard or controller inputs into signals the game understands. 2. Essential Tools for Running Games
That standard was the , and the most iconic iteration remains the Taito Type X2 .