The MiSTer ZX Spectrum core was derived from the works of Till Harbaum.
The ZX Spectrum is an 8-bit personal home computer released in the United Kingdom in 1982 by Sinclair Research.
Referred to during development as the ZX81 Colour and ZX82, it was launched as the ZX Spectrum by Sinclair to highlight the machine’s colour display, compared with the black and white of its predecessor, the ZX81. The Spectrum was released as eight different models, ranging from the entry level with 16 KB RAM released in 1982 to the ZX Spectrum +3 with 128 KB RAM and built in floppy disk drive in 1987; together they sold over 5 million units worldwide (not counting clones).
The Spectrum was among the first mainstream-audience home computers in the UK, similar in significance to the Commodore 64 in the US. The introduction of the ZX Spectrum led to a boom in companies producing software and hardware for the machine, the effects of which are still seen. Some credit it as the machine which launched the UK IT industry. Licensing deals and clones followed, and earned Clive Sinclair a knighthood for “services to British industry”.
The Commodore 64, Dragon 32, Oric-1, Oric Atmos, BBC Micro and later the Amstrad CPC range were rivals to the Spectrum in the UK market during the early 1980s. While the machine was officially discontinued in 1992, new software titles continue to be released – over 40 so far in 2018.