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I'm no expert in any of this frankly but I wanted to document how I got Picotron working using Portmaster on my ARM based retro handheld, the Anbernic RG353P. Since the ARM release this was the first thing I wanted to do, even though my device has a 4:3 3.5 inch screen (which is not ideal).

I have only tested it on Ark OS but in theory as long as your OS supports SDL 2 it should be the same process. Don't shoot me if I'm wrong.

  1. Create a picotron folder within your ports folder (for me this sits within roms/roms2 - make sure you pick roms2 if you have a second SD card)
  2. Download and extract the ARM version of Picotron to your new picotron folder
  3. Create a picotron.sh file with the following content and save it to the ports folder (not the picotron folder - the parent folder)
 
#!/bin/bash
# PORTMASTER: picotron.zip, Picotron.sh

XDG_DATA_HOME=${XDG_DATA_HOME:-$HOME/.local/share}

if [ -d "/opt/system/Tools/PortMaster/" ]; then
  controlfolder="/opt/system/Tools/PortMaster"
elif [ -d "/opt/tools/PortMaster/" ]; then
  controlfolder="/opt/tools/PortMaster"
elif [ -d "$XDG_DATA_HOME/PortMaster/" ]; then
  controlfolder="$XDG_DATA_HOME/PortMaster"
else
  controlfolder="/roms/ports/PortMaster"
fi

source $controlfolder/control.txt
source $controlfolder/device_info.txt

get_controls

GAMEDIR=/$directory/ports/picotron

> "$GAMEDIR/log.txt" && exec > >(tee "$GAMEDIR/log.txt") 2>&1

cd $GAMEDIR

$ESUDO rm -rf ~/.picotron
ln -sfv $GAMEDIR/conf/.picotron ~/

$ESUDO chmod 666 /dev/tty1
$ESUDO chmod 666 /dev/uinput
$GPTOKEYB "picotron" -c "$GAMEDIR/picotron.gptk.1" &
LD_LIBRARY_PATH="$GAMEDIR/libs" SDL_GAMECONTROLLERCONFIG="$sdl_controllerconfig" ./picotron 2>&1 | tee $GAMEDIR/log.txt
$ESUDO kill -9 $(pidof gptokeyb)
$ESUDO systemctl restart oga_events &
printf "\033c" >> /dev/tty1
  1. Create a picotron.gptk.1 file with the following content and save it to the picotron folder
 
back = \"
start = \"
a = \"
b = \"
x = \"
y = \"
l1 = \"
l2 = mouse_right
l3 = \"
r1 = \"
r2 = mouse_left
r3 = esc
up = up
down = down
left = left
right = right
left_analog_up = \"
left_analog_down = \"
left_analog_left = \"
left_analog_right = \"
right_analog_up = mouse_movement_up
right_analog_down = mouse_movement_down
right_analog_left = mouse_movement_left
right_analog_right = mouse_movement_right
deadzone_triggers = 3000
mouse_scale = 8192
mouse_delay = 16

So for me, right analog stick controls the mouse, R2 is left click, L2 is right click and R3 (right thumbstick in) is escape key. Mouse speed is a little slow but it's only just sensitive enough to navigate the OS.

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