Moo
Moo
I'm hoping the PCBs aren't the issue here, I've made both a Mega Drive and Super Nintendo adapter using the same boards and ICs. I'm reading a resistance of about...

My issue is that even with only gnd and 5v connected this issue still occurs.
I gave it a shot with a bare PCB and a DB25 connector, 5V was making its way to the esp32 (I'm using the blueretro AIO mainboard) but the AM1117...
Put another one together, the ICs literally went up in smoke. I give up.