Prodatron, how mouse detection is implemented in SymbOS/EP? I only ask this because I noticed an odd behaviour with my Enterprise-128 (Xep128) emulator. Mouse is only emulated, if you click inside the emulation window ("mouse grab mode"), before that, you can use numeric keypad arrow keys as joystick. If I start SymbOS in mouse grab mode, it works. But if I don't it's useless the enter into mouse grab mode, pointer does not react as well. Zozo commented (and it seems the only logical answer) this as SymbOS should have some kind of mouse detection, and if it fails at the startup, mouse won't work even if you plug it meanwhile (or in an emulator: if mouse emulation is switched on meanwhile). It's a problem, as some EP software seem to be picky when having mouse emulated (like EPDOS) if it would use joystick for example. So I can't see a clear solution now, unless if I can implement a workaround, to "cheat" for SymbOS there is some mouse, even if it's not emulated at the detection time only later. Of course it's not a fatal error, as user can enter into mouse grab mode with a click before starting SymbOS, but it's somewhat uncomfortable as for example I always forget it, and have to restart SymbOS to work this around. Thanks for your answer in advance!