Chorded keyboards are useful tools used to enter characters or commands formed by pressing several keys together. They are a bit like a piano. In the great blog post from Sustburbia, we will see how to efficiently connect one with an FPGA board, especially the Papilio DUO. The keypad is loosely based on the Microwriter – an early UK designed portable keypad / notewriter. Having 6 keys, there are 64 different possible combinations. The wiring process will allow us to interface the keypad directly an Atari joystick port of a Classic Computing Shield.