Reply To: ZX81 Emulation? Welcome Page › Forums › RetroPie Project › New to RetroPie? Start Here! › ZX81 Emulation? › Reply To: ZX81 Emulation? 03/17/2016 at 12:04 #120685 dudleydesParticipant You can use ZEsarUX emulator which can be installed from the experimental menu. To emulate the ZX81, you will need to add the following line to the config file, /opt/retropie/configs/zxspectrum/.zesaruxrc: --machine ZX81 I’m not not familiar with the ZX81 so I’ve not played around with it myself. If you need further guidance in using ZEsarUX, then please let me know.