tk-90x
     
         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
        http://www.kendalls.demon.co.uk/cssfaq/.
     
        "comp.sys.sinclair faq", d burke m fayzullin p kendall et al,
        pub. philip kendall 1998
     
        1998-11-09
     
     
see also:
clone micro digital sinclair research zx spectrum 8-bit microcomputer 
interface 2 joystick interface basic programming 
graphics commodore 64 rom timex tc2048 
lt;comp.sys.sinclair faqgt;