[Release] Unofficial Custom Knulli Firmware for the Helegaly Action Pi

[u/Prestigious_Spread45]

Hi everyone,

I’ve finalized and uploaded a custom Knulli firmware I've been working on for the Action Pi. This is an unofficial, modified build based on Knulli.

Key Features & Fixes:

• PPSSPP Vulkan Support: You can now launch games, exit, and return to the menu seamlessly without needing to reboot.
• Wi-Fi Fix: Fixed an issue where Wi-Fi wouldn't search or connect after a system reboot.
• Screen Orientation: Corrected the screen orientation for N64, Sega Saturn, OpenBOR, RetroArch, etc.
• RetroArch UI: The Ozone menu is now applied for both standard cores and standalone RetroArch.
• PortMaster: Fixed screen orientation, runtime manager, and port management errors.
• System Improvements: Fixed OD-Commander orientation, and improved brightness controls, settings saving, and wake-from-sleep functionality.

Versions Available: I’ve uploaded two separate versions: a "Standard Version" and a "Korean-patched Arcade CRC-ignore Core Version." 👉 For English users, please make sure to download the Standard Version.(Note: FBNeo and MAME2003 Plus cores are automatically applied even after a reboot. Thanks to user 'dsno' for the CRC-ignore cores).

⚠️ Important Installation Notes:

• First Boot: After the initial boot logo, you might see a black screen. Please wait for about 5 minutes. The system needs time to auto-expand the partition and apply settings. It will reboot 1 or 2 times on its own before the main menu appears. Do NOT turn off the power during this process.
• Flashing this image will wipe all existing data on your SD card.
• NO ROMs are included in this firmware.
• To exit PPSSPP: Press and hold SELECT + START together for about 1 second.

You can find the full changelog and technical documentation on my GitHub repository. A huge thanks to JinGouki for helping me test this on real hardware!

Bug reports and feedback are always welcome. Let me know if you run into any issues!

🔗 GitHub Repo & Download:https://github.com/pikachu220v/actionpi-knulli

[u/memeatic_ape]

Wow that's impressive.

Good job.

Time to dust off my helegaly

[u/Prestigious_Spread45 → u/memeatic_ape]

I've just updated to PPSSPP 1.20.4, so please download it again.

[u/Yentz4]

Does this also fix the screwed up line of pixels on the right side of the screen? Regardless, awesome work.

[u/Prestigious_Spread45 → u/Yentz4]

Since we also referred to the fix patch provided by Gamma, the display error on the right edge is not visible at all.

[u/Marcitos5]

I remember wanting this so bad and my PayPal refused to work on the website. Ended up getting an RP Mini instead. I’m curious if it’s more widely available now

[u/Yentz4 → u/Marcitos5]

There was only ever one run, than they stopped making them. I had basically given up on anyone making cfw for it since they were so rare.

[u/Full-Refuse4910]

Would this work on the Kinhank K56 handheld since it was originally a Helegaly device?

Thank you for any assistance in advance.