For the Sinclair Spectrum use the Emulator "EmuZwin 2.7" - Commandline: EmuZWin.exe /FULLSCREEN "[ROMPATH]\[ROMFILE]" For the Sinclair Zx81 use "Eightyone 1.0a" - Commandline: EightyOne.exe "[ROMPATH]\[ROMFILE]" Both Emulators work fine together with GameEx. i hope that's help a little.