ZX Spectrum Next | I have built this distro linux for Raspberry pi all version Zx sinclair Spectrum like with fuse unix ZX emulator , i dunno if it can be of
Tynemouth Software: ZXBaremulator - Bare metal ZX Spectrum emulator for Raspberry Pi
Hermit Retro ZX Spectrum Board Is a Replacement Board for ZX Spectrum Cases - Hackster.io
Amazing Raspberry Pi Zero ZX Spectrum Emulator Is Retro-Stuffed Into A Cassette Tape | HotHardware
Spectrum Emulator (full screen) on the Raspberry Pi » Alistair's Blog
Bare Metal Emulation - ZX Spectrum on a Raspberry Pi - YouTube