How to install the PICO-8 on Retropie for dum-dums

pjft

@capeman you can edit to ES when loading a games directly, let that not scare you into doing it.

I'll share my config file later. I think by default I'm loading a game, and then I just have a '+Start SPLORE.sh' file to load SPLORE directly. Will look into it when I get the hands on my pi!

pjft

@Capeman for reference, here are my notes:

1. Change theme
2. Change es_systems.cfg
  <system>
    <name>pico8</name>
    <fullname>Pico-8</fullname>
    <path>/home/pi/RetroPie/roms/pico8</path>
    <extension>.p8 .png .sh</extension>
<command>/opt/retropie/supplementary/runcommand/runcommand.sh 0 _SYS_ pico8 %ROM%</command>    
    <platform>pico8</platform>
    <theme>pico8</theme>
  </system>

3. in /opt/retropie/configs/pico8/emulators.cfg add

default = "pico8_dyn"
pico8_dyn = "/home/pi/RetroPie/roms/pico8/pico8_dyn -run %ROM%"

4. See this:
https://www.lexaloffle.com/pico-8.php?page=manual

add this to the sdl_controllers.txt file:

03000000790000000600000010010000,DragonRise Inc. Generic USB Joystick,a:b3,b:b1,back:b8,dpdown:h0.4,dpleft:h0.8,dpright:h0.2,dpup:h0.1,leftshoulder:b4,leftstick:b10,lefttrigger:b6,leftx:a0,lefty:a1,rightshoulder:b5,rightstick:b11,righttrigger:b7,rightx:a3,righty:a4,start:b9,x:b2,y:b0,

5. Change in ~/.lexaloffle/pico8/config.txt

// audio volume: 0..256 
volume 96

// Location of pico-8's root folder
root_path /home/pi/RetroPie/roms/pico8/

// Location of cartridge save data
cdata_path /home/pi/RetroPie/roms/pico8/cdata

6. Create SPLORE launcher by adding a "+Start Splore.sh" file at /home/pi/RetroPie/roms/pico8/

#!/bin/bash
/home/pi/RetroPie/roms/pico8/pico8_dyn -splore -root_path /home/pi/RetroPie/roms/pico8/

Some notes:

I have my executable and roms in /home/pi/RetroPie/roms/pico8/ (needs execution permission if external storage)
Step 4 is useful for me as I have a DragonRise joystick. If you have others that need more specific settings, you can add yours from the SDL list, or ignore that step - my PS3 controller works perfectly out of the box.
Step 6 is needed to have Splore be launched.

Hope this helps. What games do you have there that you recommend, if you don't mind me asking?

Best.

Capeman

@pjft Sweet! I'll have to try that, I tried to follow another writeup before but it definitely didn't include some of the steps you detailed above. I'll update it one of these evenings and let you know how it works out for me, thanks!

pjft

@capeman Sure thing. Just saying that these were my notes for my specific setup. Your paths and decisions may vary (for instance, the changes to the .ini file).

silent_lesch

Thank you for the guide. Almost all of it worked in 2021, but there are few things I'd like to alter for those who will come after us.

First, there's a typo in pt 5

Stick a few into the /home/pi/pico8 folder

the correct folder path is /home/pi/pico-8 with a dash. Not a big thing, but if you doing this via SSH, there could be a hiccup.

Then, the es_systems.cfg file. There's no such file in /opt/retropie/configs/all/emulationstation by default. Maybe it was changed in some RetroPie update, but anyway. To add a new system to Emulation Staion, you have to:

Copy the system config to the home folder to make a custom config:

cp /etc/emulationstation/es_systems.cfg ~/.emulationstation/es_systems.cfg

Edit this file and add the Pico8 configuration snippet from the guide

nano ~/.emulationstation/es_systems.cfg

Restart RetroPie

sudo shutdown -r now

Finally, I use my RetroPie as an emulation station it is. There's no keyboard in my setup, only a gamepad. Therefore I cannot press Ctrl-R to run a cartridge. For those like me who just wanna play their games, just add -run suffix to the command line in the snippet

<command>/opt/retropie/supplementary/runcommand/runcommand.sh 0 "/home/pi/pico-8/pico8 %ROM% -run"</command>

You still gonna have to manually restart RetroPie (or use ssh), but at least your ROMs will start automatically.

Also, as for that WiringPi lib - I'd say that it is needed only if you want to connect a custom controller using GPIO.

Anyway, thanks again for the guide. Cheers.

Tupin86

I'm still having trouble installing this. I followed all of the instructions and it still kicks me out with a black screen. Is it some issue with permissions? I went into the dev log and this is what I got:

Parameters: 
Executing: /home/pi/pico-8/pico8 /home/pi/pico-8/picooffroad-5.p8
/opt/retropie/supplementary/runcommand/runcommand.sh: line 1279:  1279 Segmentation fault      /home/pi/pico-8/pico8 /home/pi/pico-8/picooffroad-5.p8

pjft

A segmentation fault shouldn't really be a permissions thing.

What happens when you run it straight from the command line? What system are you on?

Tupin86

@pjft
"SDL error: Could not initialize EGL

FATAL ERROR: Unable to create window

Segmentation fault"

That's what I get running it from the command line, I'm on a RPi4

pjft

@tupin86 Please provide more details per https://retropie.org.uk/forum/topic/3/read-this-first , specifically:

RetroPie Version Used (eg 3.6, 3.8.1, 4.1 - do not write latest):
Built From: (Pre made SD Image on RetroPie website, Berryboot, or on top of existing OS etc.. - please provide the filename of any image used)
Attachment of config files: /boot/config.txt
Pico8 version that you installed, and from.

That error you're getting suggests an issue with the video driver being used in your setup.

EDIT: it seems @GoodClover had the same issue as you in the past. Maybe others can help here, as I certainly don't have that from my RetroPie setup, but I can certainly imagine that more recent versions use a different video driver that causes issues with Pico8.

BenMcLean

This is still somewhat confusing as it has you editing files that may not even exist and aren't accessible by the default samba shares. Also, leaving out that chmod step was very bad. I may need to write my own better guide if nobody else has made a simple one.

Anyway, I did this over ssh to make es_systems.cfg accessible so I could open it in Notepad++ on Windows

sudo cp /etc/emulationstation/es_systems.cfg /opt/retropie/configs/all/emulationstation/

I also had to do

sudo chmod -R 0777 /opt/retropie/configs/all/emulationstation/es_systems.cfg

in order to allow me to edit it. This is not easy stuff for dum-dums. It needs a script really. People who just want to play Pico-8 games cannot understand all this arcane wizardry.

Also had to switch to using pico8_dyn

I shouldn't have to choose between running the pico8 cartridge directly versus running splore. I should be able to do either one, anytime. How do I fix this?

(later edit) More recent guide here: https://retropie.org.uk/forum/topic/30736/how-to-install-pico-8-on-a-raspberry-pi-3-or-4-for-dummies-2021-version?_=1627524066426