Abstract: The invention is embodied by game adapter card for interfacing between a host bus of a host central processing unit (CPU) and a game joystick including a variable resistor having a bias voltage input and a wiper output, the game adapter card including: a programmable resistor connected in series between the wiper output of the joystick and a voltage return terminal, an analog-to-digital converter (ADC) having a digital output and an analog input coupled to a connection point between the wiper output and the programmable resistor, apparatus for providing asynchronous data transfer from the digital output to the host bus and for rapidly programming said resistor with an optimal divider resistor value corresponding to a current joystick wiper output. The game adapter card can be backward compatible with existing game software by providing a default analog channel.

Abstract: The invention is embodied by game adapter card for interfacing between a host bus of a host central processing unit (CPU) and a game joystick including a variable resistor having a bias voltage input and a wiper output, the game adapter card including: a programmable resistor connected in series between the wiper output of the joystick and a voltage return terminal, an analog-to-digital converter (ADC) having a digital output and an analog input coupled to a connection point between the wiper output and the programmable resistor, apparatus for providing asynchronous data transfer from the digital output to the host bus and for rapidly programming said resistor with an optimal divider resistor value corresponding to a current joystick wiper output. The game adapter card can be backward compatible with existing game software by providing a default analog channel.

Abstract: The invention is embodied by game adapter card for interfacing between a host bus of a host central processing unit (CPU) and a game joystick including a variable resistor having a bias voltage input and a wiper output, the game adapter card including: a programmable resistor connected in series between the wiper output of the joystick and a voltage return terminal, an analog-to-digital converter (ADC) having a digital output and an analog input coupled to a connection point between the wiper output and the programmable resistor, apparatus for providing asynchronous data transfer from the digital output to the host bus, apparatus for incrementing the resistance of the programmable resistor whenever the digital output falls below a predetermined minimum digital value. The game adapter card can be backward compatible with existing game software by providing a default analog channel.