The spectrum is one of the classic icons of british computer gaming and heres an emulator for it:

Unreal Speccy Portable v0.0.78.2 is released. unreal speccy portable is a Portable ZX-Spectrum emulator. unreal speccy portable supports Z80 128K (Pentagon) AY/YM, Beeper, Beta Disk, Tape, Kempston Joystick/Mouse, Snapshots. Created to be ported to many platforms such as Windows/Linux/Symbian/WinMobile/Dingoo/...

Unreal Speccy Portable v0.0.78.2 Changelog:
GigaScreen video mode support option

download https://bitbucket.org/djdron/unrealspeccyp

via http://www.emucr.com/2017/12/unreal-...le-v00782.html