Simple Genesis 3-button to PC-Engine adapter Tested on breadboard, test PCBs incoming Genesis Controller Pin Type Name (Select=GND) Name (Select=+5V) 1 Out Up Up 2 Out Down Down 3 Out Gnd Left 4 Out Gnd Right 5 +5VDC +5VDC 6 Out Button A Button B 7 In Select Select 8 Ground Ground 9 Out Start Button C PC-Engine Controller Pin Type Name (Select=GND) Name (Select=+5V) 1 +5VDC +5VDC 2 Out Button C (I) Up 3 Out Button B (II) Right 4 Out Button A (Sel) Down 5 Out Start Left 6 In Select Select 7 In /Enable /Enable 8 Ground Ground PC-Engine Extension Wiring Pin Color 1 Brown 2 Red 3 Orange 4 Yellow 5 Green 6 Blue 7 Purple 8 Black
