Patent ID: 7075515

Claim:
A method for testing a joystick control circuit, wherein said joystick control circuit is connected to a game port that comprises a plurality of pins addressed to a plurality of joystick buttons, comprising steps of: providing a testing device, latching under an order signal, either shorted circuit or opened circuit in said pins of said game port addressed to said joystick buttons; connecting said testing device to said game port; outputting a short circuit signal to said testing device for shorting circuit in said pins addressed to said joystick buttons; determining whether said joystick control circuit is in a state in accordance with a push-on of said joystick buttons; outputting an open circuit signal to said testing device for opening circuit in said pins of said game port addressed to said joystick buttons; and determining whether said joystick control circuit is in a state in accordance with a release of said joystick buttons.