Interfaces in this category will allow you to attach your switch based controls (Arcade Pushbuttons, Microswitch-based Joysticks, etc.) to your PC using the PS/2 keyboard port. These interfaces output Key-press data to the PC, just like your keyboard.
PS/2 keyboard technology is very fast and has no limits on the number of simultaneous button presses inherent to USB keyboard technology. They are easy to use and require no extra drivers to be installed.
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