Jumper and DIP switch help and support Updated: 09/15/2017 by Computer Hope Jumper and DIP switch basics What is a jumper? What is a DIP switch? Hard drive jumper settings and older drive specifications. Jumper and DIP switch questions and answers What is the 1 by the jumper or how do I locate pin 1? Computer jumpers don't have any pins, only solder beads. Where can I find or buy more jumpers? Only plastic cover comes off when removing a jumper. How to move, remove, and adjust jumpers and DIP switches.