@ptitSeb Just noticed the emulator https://sourceforge.net/projects/mz800emu/ has been updated quite regularly last two years. Guy working on it is Czech see link for all updates. Not sure if it helps any of the issues you had two years ago, but might be worth checking. https://translate.google.com/transl...limit=100#5b72dd5f3241d267ef03e7a9&edit-text= Two updates since your last attempt that I thought might be interesting: - Fine tuning in audio - SDL-2.0.7. Change configuration in Makefile. - Fixed r109 for linux + upgrading the treeview columns in the debugger If there are no updates in the list that might help speed it up don't bother, but if there is a chance it can be full speed on Pandora I would appreciate another try BTW you mentioned that SDL2 and GTK were fighting for the display - would that be something the developer might help with (if so - I can contact the developer and ask for assistance)? Or does that mean a significant re-write of code?