Use the PSX to MVS NeoGeo Arduino Mini interface to connect BlueRetro (PS1) without the use of any switches and connect the two players with just a few cables.
The ESP8266 downloads the OTA for the Arduino Pro Mini from a URL on an http server, then powercycles the Pro Mini pulsing PC6/RESET, during which it also drives the Mini's DTR low. After RESET goes ...
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