Retro Fix Lab
Practical, problem-focused guides for getting retro games and handhelds working again. Start with the symptom you can see, follow the checks in order, and verify the result before changing anything else.
Browse by problem
- Troubleshooting — diagnose missing games, network problems, storage issues, controls, and other specific symptoms.
- Setup Guides — configure controls and other features with clear, scoped steps.
- Gear & Compatibility — check hardware, storage, charging, and compatibility guidance.
- Start Here — learn how Retro Fix Lab separates documented information from hands-on test results.
KNULLI and RG CubeXX
Fix common KNULLI problems on RG CubeXX, including storage selection, missing games, BIOS warnings, Wi-Fi, Windows file sharing, scraped artwork, and save-state restrictions.
- KNULLI games not showing up
- Second SD card detected but not used
- Wi-Fi not connecting or disconnecting
- SMB SHARE not visible in Windows
DOSBox Pure on RG CubeXX
Use the guide that matches the problem you are seeing in DOSBox Pure.
Latest Guides
- Install PortMaster in KNULLI and Add One Ready-to-Run Port
- Secure KNULLI Network Access Before Using SMB or SSH
- KNULLI Scraper Finds the Wrong Game or No Match: Fix One Game Manually
- Set Up Multi-Disc Games in KNULLI with an M3U Playlist
- KNULLI Quick Resume Boot Loop: Disable the Stuck Auto-Launch from knulli.conf
- KNULLI Built-In Controls Stop In-Game with an External Controller: Restore Handheld Player 1
Evidence and testing
Retro Fix Lab identifies hands-on testing only when it was actually performed. Other guidance is based on official documentation and clearly scoped sources, with corrections made when verified information changes. Read How We Test & Update.