With the success of the early mass-production microcomputers, such as the
Commodore PET 2001, a whole new world upened up. The kit built computers had
limited appeal because not everyone had the skills needed to assemble them.
Now many new companies began producing 8-bit microcomputers, most based on
either the Zilog Z-80, Intel 8080, or MOS 6502 cpus. The Texas Instruments
TI-99/4A was actually built around a TMS-9900 16bit CPU.
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