IDC-10 DB-25 Pin 1 Pin 8 Pin 2 Pin 3 Pin 3 Pin 2 Pin 4 Pin 20 Pin 5 Pin 7 Pin 6 Pin 6 Pin 7 Pin 4 Pin 8 Pin 5 Pin 9 Pin 22A 12 Inch Ribbon cable with one end db-25 Male and the other IDC 10 pin Female. These small cables plug into motherboards and some I/O Cards.