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.
- 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
- Transfer Games to KNULLI from Windows: SMB and SFTP Setup
- How to Install KNULLI on RG CubeXX: Correct Image, Safe Flash, and First Boot
- KNULLI Quick Menu Not Opening? Fix M+B and RetroArch Hotkey Problems
- KNULLI Save States Not Working? Check RetroAchievements Hardcore Mode
- KNULLI Second SD Card Detected but Not Used? Fix Userdata Storage Selection
- KNULLI Scraped Box Art Not Showing? Fix Missing Game Images and Metadata
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.