The TK90X was a Brazilian ZX Spectrum clone made in 1985 by Microdigital Electrônica, a company from São Paulo, that had previously manufactured ZX80 and ZX81 clones.
TK90X
TK90X boot screen
The ZX Spectrum is an 8-bit home computer developed and marketed by Sinclair Research. It is one of the most influential computers ever made, and also one of the best selling computers ever, with over five million units sold. It was first released in the United Kingdom on 23 April 1982, and around the world in the following years, most notably in Europe, the United States, and Eastern Bloc countries.
An issue 2 1982 ZX Spectrum
Sir Clive Sinclair riding an X-Bike prototype in 1990.
An original concept sketch of the ZX Spectrum, depicting an angular and wedge-like form similar to its predecessor, the ZX81.
Designer Rick Dickinson pictured in Sinclair Research's Cambridge office in 1983.