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Meaning of TK-90X

Computing Dictionary

A Brazilian clone, manufactured by micro digital, of the British sinclair research zx spectrum 8-bit microcomputer. It differed from the standard Spectrum by adding an interface 2-compatible joystick interface, and extra basic commands to aid programming and graphics-editing. Because of these differences, it was slightly incompatible with the standard Spectrum.

A later model, the TK-95, which boasted an improved keyboard (similar to the commodore 64's) and a more compatible rom, was little more than a timex tc2048 (another Spectrum clone) in disguise.

comp.sys.sinclair faq.

["comp.sys.sinclair FAQ", D Burke M Fayzullin P Kendall et al, pub. Philip Kendall 1998]