GPi Zero 2 v1.52 & GPi Zero v1.15(Retropie Images for Pi Zero/Zero2 + GPi Case 1 & GPi Case 2W)

Sliver X

This image has a custom config.txt that the HDMI scripts edit in place to replace the (crude) functionality the original GPi Case patch performed.

When you enable HDMI out under the Advanced Settings menu, it removes a block of text that sets up the A/V over the GPIO pins, allowing the HDMI output to work at next reboot. When/if it detects the cable has been unplugged, or the HDMI toggle script is ran manually again, it adds it back.

Replace all text in config.txt with the following to set it back to how my setup expects it to be:

# For more options and information see
# http://rpf.io/configtxt
# Some settings may impact device functionality. See link above for details

# uncomment if you get no picture on HDMI for a default "safe" mode
#hdmi_safe=1

# uncomment this if your display has a black border of unused pixels visible
# and your display can output without overscan
#disable_overscan=1

# uncomment the following to adjust overscan. Use positive numbers if console
# goes off screen, and negative if there is too much border
#overscan_left=16
#overscan_right=16
#overscan_top=16
#overscan_bottom=16

# uncomment to force a console size. By default it will be display's size minus
# overscan.
#framebuffer_width=1280
#framebuffer_height=720

# uncomment if hdmi display is not detected and composite is being output
#hdmi_force_hotplug=1

# uncomment to force a specific HDMI mode (this will force VGA)
#hdmi_group=1
#hdmi_mode=1

# uncomment to force a HDMI mode rather than DVI. This can make audio work in
# DMT (computer monitor) modes
#hdmi_drive=2

# uncomment to increase signal to HDMI, if you have interference, blanking, or
# no display
#config_hdmi_boost=4

# uncomment for composite PAL
#sdtv_mode=2

# Uncomment some or all of these to enable the optional hardware interfaces
#dtparam=i2c_arm=on
#dtparam=i2s=on
#dtparam=spi=on

# Uncomment this to enable infrared communication.
#dtoverlay=gpio-ir,gpio_pin=17
#dtoverlay=gpio-ir-tx,gpio_pin=18

# Additional overlays and parameters are documented /boot/overlays/README

# Enable audio (loads snd_bcm2835)
dtparam=audio=on

[pi4]
# Enable DRM VC4 V3D driver on top of the dispmanx display stack
#dtoverlay=vc4-fkms-v3d
max_framebuffers=2

[all]
disable_splash=1
enable_uart=0
dtparam=sd_overclock=50
gpu_mem_256=128
gpu_mem_512=128
gpu_mem_1024=256
overscan_scale=1
arm_freq=1000
over_voltage=0
initramfs initramfs.img

###gpicase###
boot_delay=3
dtoverlay=audremap,pins_18_19,swap_lr
display_rotate=1
dtoverlay=dpi24
overscan_left=0
overscan_right=0
overscan_top=0
overscan_bottom=0
framebuffer_width=320
framebuffer_height=240
enable_dpi_lcd=1
display_default_lcd=1
dpi_group=2
dpi_mode=87
dpi_output_format=0x6016
#hdmi_timings=320 0 28 18 28 480 0 2 2 4 0 0 0 60 0 32000000 6
hdmi_timings=240 1 38 10 20 320 1 20 4 4 0 0 0 60 0 6400000 1
avoid_safe_mode=1
disable_pvt=1
disable_audio_dither=1
extra_transpose_buffer=2
audio_pwm_mode=2
dtparam=act_led_trigger=default-on
###gpicase###

The HDMI scripts should work now. Unless you deleted ~/gpihdmiout, in which case, you need to put that back since that's where the scripts themselves and the required dtbo files live.

If not, not sure what you're running into; I've gotten it to work with 8 different TVs and monitors so far.

killj0y1

@sliver-x ok got it but can I still add an overclock or will your script just refuse to work if anything is set differently. Really only would edit that and overvoltage. So long as it works but way you described I'm happy with that.

Sliver X

@killj0y1

"enable.sh" takes a backup of current Retroarch config files and EmulationStation's config then restores the HDMI mode copies of them if they exist, deletes the text between the #####gpizero##### markers in /boot/config.txt, copies /home/pi/gpihdmiout/hdmi.dtbo to /boot/overlays/dpi24.dtbo, blanks the file /etc/asound.conf and sets the default sound device in EmulationStation to HDMI.

"disable.sh" takes a backup of current Retroarch config files and EmulationStation's config then restores the LCD mode copies of them if they exist, adds the text between the #####gpizero##### markers in /boot/config.txt, copies /home/pi/gpihdmiout/lcd.dtbo to /boot/overlays/dpi24.dtbo, builds a copy of /etc/asound.conf that performs mono downmixing of the audio and sets the default sound device in EmulationStation to "Headphone".

So long as nothing you set in config.txt conflicts with something "disable.sh" or "enable.sh" is writing to config.txt, or trying to do custom ALSA configs via /etc/asound.conf, it shouldn't matter what you change, the scripts won't touch it.

killj0y1

@sliver-x ok awesome and I'm assuming you appended everything to the config.txt on the boot partition or is it stored elsewhere?

Edit: nvm I got what you meant in the first post. Swap it completely and let it do its thing.

Edit2: I think I know what the problem might be. Your original es_systems.cfg I disabled to use the updated (I installed more systems that didn't show up) in /etc vs /opt. I wonder if that's what's causing the problem I'll try and copy it over and see if that does the trick. I'll also check out config.txt to see if it matches what you posted.

Edit 3: yup config.txt matches. Moved over es_systems.cfg to match in /opt gonna try it out.

Edit4: yea no dice even tried another tv. Config.txt seems fine I'll attach it if I can or just add it to this post. Otherwise everything else seems fine the gpihdmi folder you mentioned is there and I even took a look at the script and nothing it references was changed. So odd.

# For more options and information see
# http://rpf.io/configtxt
# Some settings may impact device functionality. See link above for details

# uncomment if you get no picture on HDMI for a default "safe" mode
#hdmi_safe=1

# uncomment this if your display has a black border of unused pixels visible
# and your display can output without overscan
#disable_overscan=1

# uncomment the following to adjust overscan. Use positive numbers if console
# goes off screen, and negative if there is too much border
#overscan_left=16
#overscan_right=16
#overscan_top=16
#overscan_bottom=16

# uncomment to force a console size. By default it will be display's size minus
# overscan.
#framebuffer_width=1280
#framebuffer_height=720

# uncomment if hdmi display is not detected and composite is being output
#hdmi_force_hotplug=1

# uncomment to force a specific HDMI mode (this will force VGA)
#hdmi_group=1
#hdmi_mode=1

# uncomment to force a HDMI mode rather than DVI. This can make audio work in
# DMT (computer monitor) modes
#hdmi_drive=2

# uncomment to increase signal to HDMI, if you have interference, blanking, or
# no display
#config_hdmi_boost=4

# uncomment for composite PAL
#sdtv_mode=2

# Uncomment some or all of these to enable the optional hardware interfaces
#dtparam=i2c_arm=on
#dtparam=i2s=on
#dtparam=spi=on

# Uncomment this to enable infrared communication.
#dtoverlay=gpio-ir,gpio_pin=17
#dtoverlay=gpio-ir-tx,gpio_pin=18

# Additional overlays and parameters are documented /boot/overlays/README

# Enable audio (loads snd_bcm2835)
dtparam=audio=on

[pi4]
# Enable DRM VC4 V3D driver on top of the dispmanx display stack
#dtoverlay=vc4-fkms-v3d
max_framebuffers=2

[all]
disable_splash=1
enable_uart=0
dtparam=sd_overclock=80
gpu_mem_256=128
gpu_mem_512=128
gpu_mem_1024=256
overscan_scale=1
arm_freq=1300
over_voltage=5
initramfs initramfs.img

###gpicase###
boot_delay=3
dtoverlay=audremap,pins_18_19,swap_lr
display_rotate=1
dtoverlay=dpi24
overscan_left=0
overscan_right=0
overscan_top=0
overscan_bottom=0
framebuffer_width=320
framebuffer_height=240
enable_dpi_lcd=1
display_default_lcd=1
dpi_group=2
dpi_mode=87
dpi_output_format=0x6016
#hdmi_timings=320 0 28 18 28 480 0 2 2 4 0 0 0 60 0 32000000 6
hdmi_timings=240 1 38 10 20 320 1 20 4 4 0 0 0 60 0 6400000 1
avoid_safe_mode=1
disable_pvt=1
disable_audio_dither=1
audio_pwm_mode=2
dtparam=act_led_trigger=default-on
extra_transpose_buffer=2
###gpicase###

killj0y1

@sliver-x also noticed that samba shares arent persistent after reboot but I didn't see a toggle for it. Dunno if that's intentional for power saving. It's not a big deal since I just reinstall it and it takes 2 seconds and it works. Not something I need often anyways but just curious.

killj0y1

@sliver-x ok after testing with a bone stock raspbian image to see if it's hardware or software. I tried stock raspbian on both my pi zero 2 and zero 1 and a lot of back and forth and I found it was the cable I had cut it back to make better contact but it seems not enough even though it seemed to fully fit in. So that's solved. The samba thing is still a mystery. Thanks for the help 🤘🏻

Sliver X

@killj0y1

Samba and all associated services are disabled by default. I wrote a script to toggle this; are you using it or doing this through raspi-config?

joao76

@sliver-x how can i replace advanced settings ? i have to copy es_cfg from /etc/retropie to /proc /retropie and replace the file to show missing emulators in the process i loose advanced settings options.

joao76

@joao76 A keyboard is needed to configure the nds emulator ? i cant exit the emulator . with select +start or another combination of keys.

Sliver X

@joao76

Why are you replacing the entire file rather than selectively adding what you're trying to set up?

I'm willing to support the setup I built, but you're straying outside of that at this point. Standard Retropie documentation should be sufficient to figure out what you're attempting to accomplish.

joao76

If someone can share one copy of the es_cfg in the proc/retropie its the only way i can correct my problem for replacing the advanced settings. This is a good system but there are litle things ...... and i'm begining to use and learning.

ScottHW

@Sliver-X Thanks for the fantastic work! I've just upgraded my GPi Case to Zero 2, using your RetroPie image, on a new microSD card. I manually copied over all my ROMs and saved .states, from old card to the new, using my RPi4.

I'm having one issue; the ROMs load and play just fine,
but cannot recognize/load the saved .state files.

I can Save, and Load new .state files. Can't figure out what is wrong with the copied ones. Any help would be appreciated. Cheers!

EDIT: Upon further testing, it seems it's only Nintendo NES that cannot load saved .state files.
gb and megadrive do it fine... hmmm...

ScottHW

This post is deleted!

ScottHW

@scotthw said in GPi Zero 2 v1.4 (Retroflag GPi Image for Pi Zero 2 W):

EDIT: Upon further testing, it seems it's only Nintendo NES that cannot load saved .state files.

Alright, seems to be a known issue, stemming from emulator core updates, rather than something specific to this build.

Unrecognized nes state file
https://retropie.org.uk/forum/topic/20167/unrecognized-nes-state-file
1 Dec 2018

Includes a link to the github issue.

.
And there's this discussion
Upgrading to Retropie 4.4 makes old lr-fceumm SaveStates incompatible
https://retropie.org.uk/forum/topic/17518/upgrading-to-retropie-4-4-makes-old-lr-fceumm-savestates-incompatible
25 Apr 2018

mediamogul [Global Moderator]
The best you can hope for is to load the save state from the previous core version and work your way to an area that allows for a normal memory save. Afterwards, update the core load the save and make a new save state. I realize this wouldn't be possible for all games and it's a major hassle, but it's really the only option. It's best to only utilize save states for very casual use and at no time when it's crucial to keep them for long periods of time. Save state formats can change at any time depending on development. You might see an emulator/core keep its format throughout its lifespan, or you might see it change several times a year.

Sliver X

@scotthw

It may be be worth trying to transplant the core .so file from the build the save states were created with to my image and see if that works: With a core as mature as fceumm I doubt any functionality/compatibility with various MMCs/etc would be missing between them.

If that works, just avoid updating the fceumm core in the future if possible.

celly

@Sliver-X any chance of adding Dreamcast to the list of available emulators? I know the pi0 can’t handle much but, I do know the game I want to play is playable on it (Wind and Water Power Battles).

retropieuser555

@celly I mean you can download Reicast and lr-flycast from RetroPie Setup. But obviously don't expect much

mitu

@retropieuser555 flycast is not enabled on Pi 0 in RetroPie-Setup, it can't be installed.

@celly you'll have to manually modify the lr-flycast scriptmodule to have the module available to be installed and you'll need to install from source. Note that in order to be able to update RetroPie-Setup, the changes will need to be reverted (but that will not remove the installed lr-flycast).

celly

@mitu ok thanks. Sounds like a lot more involved and I really don’t want to break anything for just one game really.

joao76

Hello i using retropie and i flashed to a new 64 gb sdcard but after i installed some neew emulators and transfering the roms the system stop to boot - corrupted sd card.

The question i have is i will flash retropie to a new 64gb card , can i expand the share partition on gparted and copy some roms before i boot the card on the rasperry pi ?

Can i have problems with this ?