I tried to configure Picotron in my current RetroPie setup. I got to the point where Picotron boots into its desktop. However I would like it to automatically load the cartridge that I selected in EmulationStation and start it. Is this possible with the current version of Picotron? If so, how should the entry in es_systems.cfg looks like?

Curious about this too, but I'm already happy it's booting - still trying to figure out screen and touch rotation on my system.

Following for more people experimenting with it.

Today I had some time to research this further. I should have read the manual more carefully. It seems the -x option if for launching a cart in headless mode.

So the EmulationStation config entry should look like this:

<system>
<name>picotron</name>
<fullname>Picotron</fullname>
<path>/home/user/RetroPie/roms/picotron</path>
<extension>.png .p64</extension>
<command>/opt/retropie/supplementary/runcommand/runcommand.sh 0 "/home/user/picotron/picotron -x %ROM%"</command>
<platform>picotron</platform>
<theme>picotron</theme>
</system>

This does indeed start Picotron with the cartridge loaded and running, but unfortunately it does not display graphics (I can hear the sound of the cartridge) and instead there is only a little blinking cursor in the top left corner. Maybe this is a bug or has to do with RetroPie or RetroArch, I do not know.

Edit: tried the same on my Linux computer from the desktop console and it has the same result: I can hear the sound, but I can't see a window with the graphics.