MVS Label Project
Neo-Geo Steering Wheel
Many thanks to Tony (Antonio Gonzalez jr.), an ex-SNK Employee for providing his circuit diagram to allow the use of an Optical Steering Wheel to play Neo-Geo Driving games such as Thrash Rally and Neo Driftout. This was demonstrated at various Trade Shows but sadly did not gather enough attention for SNK to put it into production.
The circuit simply connects inline between your Optical Wheel's encoder and the Left/Right pins of your Jamma Harness, no modifications re required to your Steering Wheel.
6x 1K Resistor
1x 12K Resistor
1x 10uF Capacitor
1x 4.7uF Capacitor
1x 74LS74 Dual D-type Positive Edge-triggered Flip-Flops (With Preset and Clear)
1x 74LS123 Dual Retriggerable One-Shot with Clear and Complementary Outputs
2x 4584 Inverter (NOT Gate)
2x 74LS08 Quad 2-Input AND Gates
2x 2N3904 General Purpose Amplifier (NPN Bipolar Transistor)
|Download the Neo-Geo Steering Wheel Schematic