Emulate the original 16k, 48k, 128k, 2 models!, Screen inc. correct timing and borders , Sound, Memory delays, load tape files and snap shot files inc. tzx tap z80 sna wav - original analogue tape via external cassette deck and sound card, or even mp3 player, plus Joystick interfaces Kempston, Sinclair. Its pretty much a complete ZX Spectrum.
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