The PC Engine/TurboGrafx family went through a lot of power supply revisions. Different internal and external tip sizes, voltages and polarity. Here’s a list of the different models and settings. PC Engine/TG Model Voltage Minimum Current Polarity Original PSU DC Barrel Jack Size Notes Old Model New Model Purchase PC Engine 9V 650mA – PAD-105 … Continue reading NEC PC Engine & TurboGrafx Power Supply Compatibility List