The Colecovision, which is similar, came out a year earlier. The Z80 (1976) and the TI graphics chip (1979) were old news by that point. I could almost imagin

The Colecovision, which is similar, came out a year earlier. The Z80 (1976) and the TI graphics chip (1979) were old news by that point. I could almost imagine an MSX standard a year earlier, with a fast Z80 (i.e. the 8 MHz Z80H, 1982) and an iteration on the TMS9918.